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Ventilators should know and be able to-rig workers
Release time:
2023-01-09
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Ventilators should know and be able to-rig workers
Rig worker
1. induction conditions
(1) Gas drainage rig workers must be qualified through professional training and take up their posts with valid certificates.
(2) Must master the operation essentials of various drilling rigs and the knowledge of maintenance and troubleshooting.
(3) The construction method and sealing technology of gas drainage drilling should be mastered.
(4) Be familiar with and abide by the "Coal Mine Safety Regulations" and the relevant regulations of the province and the company on the personnel entering the well.
(5) Understand the allowable concentration, over-limit hazards and prevention knowledge of various toxic and harmful gases underground.
(6) to understand the coal mine prevention of gas, coal dust explosion and fire and other mine disaster knowledge, and familiar with the mineWell disaster avoidance route.
2. preparation
(1) check whether the construction site has the construction conditions, do not have the construction conditions must first contact the relevant singleBit processing, processing can be carried out after construction.
(2) Prepare materials and tools such as large plate, single column, nail grabbing and post returning device for stable drilling, and place them inA safe and convenient location for pedestrians and transportation.
(3) The drilling site must be equipped with a small bucket containing water and wet cotton yarn, and the cotton yarn must be soaked thoroughly. Keg HangingIn the air inlet side roadway side not more than 2.0m away from the opening position, and move to the corresponding position with the drilling, drillingDrilling is prohibited if there is no keg filled with water and wet cotton yarn at the hole construction site.
(4) Connect the slag discharge pressure air pipe or water pipe, and check whether the water pressure and air pressure meet the requirements of construction drillingPlease, check whether the feng shui switching device can switch normally, and it is strictly prohibited to start drilling when the feng shui switching cannot be switched normally,It is forbidden to start up when the cooling water supply is abnormal.
(5) Before assembling the drilling rig, check the lubrication degree of the reduction box and the runway first. If the gear in the reduction box is lubricatedInsufficient or dirty oil, must be added to the reduction box oil;Apply engine oil on the runway, and add grease to each bearing part. After cleaning up the sundries in the fuel tank, in the fuel tankAdd No. 46 anti-wear hydraulic oil, and the oil level should be more than 2/3 of the oil level indicator.
(6) After cleaning up the sundries in the oil pipe and the threads of each connector, straighten out the oil pipe according to the hydraulic system,And connect with the drilling rig and pump station; after connecting, it is necessary to carefully check whether the tubing is connected correctly and not connected incorrectly.Location; After the air pipe and the oil pipe are connected, the oil pipe, air pipe and cable must be straightened out and hung neatly.On or atop a roadway gang.
(7) After the drilling rig is assembled, it is necessary to carefully check whether the drilling rig is in good condition; If the drilling rig is not in good condition, it must beThe drilling can be started after the drilling is properly carried out, otherwise it is strictly prohibited to start drilling.
(8) After the rig is assembled, turn on the power supply (the power supply voltage level should be consistent with the motor voltage level,That is, 380V or 660V), jog the motor, check the rotation direction of the motor and the arrow marked on the oil pumpWhether the direction is consistent or not must be adjusted to be consistent in case of inconsistency.
(9) The test run can only be carried out after all the work is ready. During the test run, each operating valve shall be sensitive and reliable, and each component shall beSmooth operation, no abnormal sound and abnormal phenomenon, otherwise should be shut down for inspection. The test run must also be carefullyCheck whether the oil pipe, joint and air pipe are leaking, and check whether the oil in the oil tank is sufficient (rig transportationWhen the oil level in the oil tank is more than 2/3 of the oil level indicator, the oil level is sufficient), and the shortage must be made up in time.
(10) The driller is responsible for checking whether the wind, water and electricity required by the drilling site are normal, and is responsible for cleaning up the drilling.Ditch from drill point to water nest.
(11) Before drilling, hang the portable tile detector and carbon monoxide portable hanger to the back of the orifice as required.Wind flow.
3. operation method
(I) handling rig
(1) The person in charge of safety handling the drilling rig will bring all the personnel handling the drilling rig to the site and make a clear inventory of the site.What equipment and tools need to be handled. The oil in the oil tank is put into a clean oil drum, and then the familiar drilling rigAccording to the drilling rig structure, the number of handling personnel and the actual situation of the handling roadway, the personnel of the structure will be organized.When the drilling rig is disassembled, the connecting hoses shall not be littered and excessively bent, and all exposed joints shall be wrapped with cotton yarn orAdd a cap to prevent foreign matter from entering the hydraulic system, causing wear of hydraulic equipment and contamination of hydraulic oil. DisintegrationWhen drilling, all kinds of bolts, nuts, nipples, joints and plugs of the drilling machine must be bagged and concentrated.Put it away to avoid loss and damage during handling.
(2) When loading and unloading the truck, hang the intact guide chain (which must be the guide chain that can bear the weight of the drilling rig components) onThe rig shall be hoisted and stabilized on the solid and reliable support point or beam, and the rig shall be checked and confirmed to be reliable by the person in charge of field safety.Only when there is no potential safety hazard can the chain guide truck be operated. Any part of the operator's body is strictly prohibited in the rigFalling position and force direction to prevent lifting objects from falling and injuring personnel and equipment.
(3) Before manually handling the drilling rig, it is necessary to check the binding of the lifting bar, rope buckle, wire rope or iron wire,Only after confirming that there is no potential safety hazard can the transportation be ordered. All handling personnel must obey the unified direction of the safety director.Wave, to do the same up and down, echo each other, and by the person in charge of safety to view the mountain, found abnormal timely stopNext, the transportation can be continued after rectification.
(4) When it is necessary to cross the belt conveyor or scraper conveyor during the handling of the drilling rig, it is necessary to contact the post department in advance.Machine contact, the driver will switch the belt conveyor or scraper conveyor hand to the "zero" position to lock, hang upThe blackout card can be passed.
(5) When the handling personnel need to pass through the lane repair point or other construction site, they must first contact the on-site construction personnel.system, agreed to pass.
(II) steady drilling
(1) Steady drilling shall be carried out after the drilling rig is moved to the position, and the drilling shall be carried out according to the drilling design parameters, and the drilling rig shall be used.The drilling rig is stabilized by tools such as logs, logs, square logs, nail grabbing, and column retractors, and logs, large plates or monomers are used.The top of the column must be firmly tied to the anchor cable, steel ladder, anchor rod orShed and other solid objects on, so as not to fall loose accident.
(2) When the drilling rig needs to stabilize drilling above the belt conveyor and scraper conveyor, the bottom of the drilling rig runway andThe distance between the top of the belt conveyor and the scraper conveyor must be above 300mm. Really need to stand on the glueWhen steady drilling is carried out on the belt conveyor or scraper conveyor, the switch of the belt conveyor or scraper conveyor must be set.Hit the handle to the "zero" position to lock and hang the power failure card.
(3) The hand-cranked retractor used to reinforce the drilling rig must be firmly tied to the anchor cable, anchor rod, shed, etc.At the pulling point, it is strictly forbidden to hang the hand-cranked return device on the anchor net, steel ladder, shed pull rod and other weak supports.Pull on the point.
(4) After the drilling rig is stable, it must be checked by the person in charge of on-site safety to confirm that it is safe and reliable before it can be started.Drilling construction holes, otherwise it is strictly prohibited to start drilling.
(III) drilling and drilling back
Before drilling, return the gyrator to the rear end of the frame, and connect the drill pipe and the drill bit through the clamp;Cut the metal mesh at the drilling opening, and brush the coal and rock at the opening to ensure the smooth contact of the drill bit. Turn on coolingWater supply valve and water braid water supply or air supply valve, slowly forward rotation of the gyrator, and slowly advance;After entering a certain depth and the drilling rig and drilling tools run smoothly, ream the hole with normal rotation and normal feed speed.After the reaming depth reaches 10m, return the drill pipe in the hole, take down the reaming drill bit, and install a dust collector (during air slag dischargeUse) and replace Φ75mm drill bit for drilling.
The dust collector must be plugged into the drill hole and plugged with wet cotton yarn around the outer diameter of the dust collector. Dust CollectorAfter installation, the dust collector shall be firmly tied to the anchor rod or shed with No. 8 iron wire to avoid sudden pressure in the hole.However, if the dust collector or other debris is blown out, it will hurt people or damage the equipment.
1. Operation of adding drill pipe
Before adding and connecting the drill pipe, it is necessary to check whether the drill pipe is in good condition, and it is strictly prohibited to use the drill pipe that is not in good condition. Before adding and connecting,The thread part of the drill pipe and the sundries in the drill pipe must be cleaned with compressed air or water to avoid increasing the grinding of the thread part.Damage and plugging.
2. Operation of adding drill pipe in the middle
(1) After the previous drill pipe is finished, stop the propulsion first, then stop the rotation, and close the slag discharge air or water valveThe door;
(2) close the gripper and clamp the drill pipe stably. when the square mouth of the drill pipe is not aligned with the gripper mouth, reverse it properly.The rotor shall be clamped to stabilize the drill pipe, and the rotor shall not be reversed for more than one revolution (this operation is used for manual grippers); equippedHydraulic gripper drilling machine, directly manipulate the gripper handle to clamp the drill pipe;
(3) Operate the rotating handle of the gyrator to reverse the gyrator, and wait for the drill pipe and the water braid shaft (use the rear water braidWhen the drill pipe is turned), return the gyrator to the rear end of the frame;
(4) The drill pipe to be connected is screwed on the previous drill pipe, and the gyrator is slowly pushed forward when the water braid shaft(Drill pipe when using rear water braid) When the male thread is in contact with the female thread of drill pipe, the drilling rig stops advancing and is to be added.The person connecting the drill pipe leaves with his hand, opens the clamper, rotates the gyrator in the forward direction to tighten the drill pipe, and completes the drill pipe addition once.pick up. Repeat the above operations, you can continue to connect the drill pipe, until the drilling is completed.
3. Operation of connecting drill pipe to rear position
(1) After the previous drill pipe is finished, stop the propulsion first, then stop the rotation, and close the slag discharge air or water valveThe door.
(2) Manually remove the rear water braid with a pipe wrench.
(3) According to the space behind the gyrator, add drill pipe behind the gyrator.
(4) Manually screw the rear water braid on the drill pipe and tighten it with a pipe wrench.
(5) Loosen the chuck and return the gyrator to the rear end of the frame.
(6) Clamp the drill pipe with the chuck, loosen the clamp, and complete the connection of the drill pipe.
(7) Every time a drill pipe is connected, butter must be applied to the male thread of the drill pipe; 3~4 drill pipes per dozenAfter that, apply butter once on the male thread pattern of the water braid shaft (drill pipe when using rear water braid) to ensure smoothDrill back and reduce thread wear
(8) After the drill pipe is connected, open the water supply or air valve of the water braid, and then goFront drilling
(9) During the drilling process, the drill pipe should be drilled at a constant speed, and the data change of the pressure gauge and the drilling rig should be observed at any time.Operation; at the same time, we must also pay attention to the stability of the drilling rig, found that abnormal conditions must be immediately shut down to deal,The drilling can be continued after handling.
(10) Drilling construction personnel must concentrate on, at any time pay attention to the drilling back water or back wind situation;If the current drilling does not return water or wind, or the return water or wind is abnormal, the drilling shall be stopped immediately. At this time, you can turnThe device reciprocates back and forth to see if the return water and wind from the borehole are normal. If the return water and wind are still abnormal, it is necessaryReturn the drill pipe and drill bit, check whether the drill pipe and drill bit are blocked, and continue drilling after handling.
(11) If there is a nozzle phenomenon during the construction process, the drilling rig shall stop drilling, and the personnel shall stand at the station, which may be affected.Observe the air inlet side outside the scope, and it is strictly forbidden for personnel to observe the nozzle hole facing the borehole. Such as due to the spray holeWhen the drilling does not return water, the gas should be released for a period of time. After confirming that the nozzle degree is reduced or no nozzle is used,After the normal return of water or wind, the drilling can continue to advance.
(IV) disassembly operation of drill pipe
1. Operation of middle disassembly drill pipe
(1) After the drilling construction meets the design requirements, open enough air or water to blow or flush the residue in the hole.After that, the drill pipe can be returned.
(2) Return the square opening of the drill pipe to the clamp bayonet position and rotate to align it. close the clamp to stabilize and reverse it.Rotary gyrator. After the drill pipe is separated from the water braid shaft (when the rear water braid is used, the drill pipe is used), and the gyrator is returned to the machine.At the rear end of the rack, the drill pipes shall be unloaded and stacked by pipe tongs manually.
(3) After the previous drill pipe is removed, the gyrator is pushed forward to the male thread of the water braid shaft and the female thread of the drill pipe.When it is on, the rotary device stops rotating and advancing, opens the clamp, and then turns positively to tighten the thread.
(4) After the thread of the water braid shaft and the thread of the drill pipe are tightened, rotate forward and backward the square opening of the drill pipe to the holder bayonet position.Set; close the gripper to stabilize and reverse the gyrator. After the connection between the drill pipe and the water braid shaft is separated, the gyrator will returnAt the rear end of the rack, the drill pipes shall be unloaded and stacked in order by manual pipe tongs. Repeat the above operation until the lastDrill pipe.
(5) When the drill pipe is disconnected from the male buckle, it is strictly forbidden to use pipe tongs to block the drill pipe, and reverse the drill rig to unscrew the drill pipe,To prevent the pipe wrench from swinging or falling off and injuring people; one pipe wrench must be used to block the water braid shaft, and the other pipe wrench must be blocked.Unscrew the drill pipe. If the length of the water braid shaft is insufficient and the pipe clamp cannot be clamped, the pipe clamp must be used to stabilize the pipe.Drill pipe; when the drill pipe is unscrewed by the reverse drilling rig, the driller stands at a safe place on the side of the drilling rig in the direction of rotation, and grasps the pipe tightly.If the handle of the pliers is reversed again, the posterior path of the operator must be unblocked.
2. Operation of removing drill pipe at rear position
(1) After the drilling construction meets the design requirements, the residue in the hole shall be blown or washed clean with compressed air or water,Only then can the back-drilling work be carried out.
(2) Place the gyrator in an appropriate position, close the water braid water supply or air valve, and use a pipe wrench to remove the rear waterBraided.
(3) The holder clamps the drill pipe, reverses the gyrator, and loosens the thread of the first drill pipe and the previous drill pipe,Loosen the chuck, move the gyrator forward and clamp the previous drill pipe, manually remove the first drill pipe and put it in order.Open the gripper and rotate the gyrator forward to separate the first drill pipe from the previous drill pipe.
(4) Repeat the above operation to remove the second drill pipe and the third drill pipe until the last drill pipe is removed.
(5) It is strictly forbidden to open the holder and pull the drill pipe out manually to prevent the drill pipe from suddenly sliding down and hurting people or sliding down the drill.inside the hole.
(6) When unloading the drill pipe with pipe tongs, the drilling machine is strictly prohibited from rotating; it is strictly prohibited to use pipe tongs to jam the drill pipe and let the drilling machine reverseTo unscrew the drill pipe to prevent the pipe wrench from jumping up and hurting people.
(7) When loading and unloading the drill pipe, the operator must stand in a safe place on the side of the drilling rig; the drill pipe to be used and itsOther objects must be neatly placed in a safe and easy-to-operate place, and it is strictly forbidden to litter, so as not to cause objects.Lost.
(8) When the operator closes the manual holder, it is forbidden to operate the arm around the top of the drill.Operate from the gripper handle side.
(9) In the process of drilling or back-drilling, the supporting berm pressure column must be checked at any time. If it is found to be loose,Drilling must be stopped in time for reinforcement.
(10) After the completion of the construction, the hole shall be sealed and the connecting pipe shall be drained in time.
(11) When drilling with pressurized air, each shift of drilling personnel must check the coal dust 50m before and after the drilling site.Cleaning is carried out.
(V) drilling and sealing operation
(1) Before the hole sealing pump enters the well, a comprehensive inspection must be carried out to ensure that the grouting pressure meets the requirements and other components are completed.Good, can be used in the well.
(2) Before sealing, debug the sealing pump and connect the high-pressure pipes reliably.
(3) Grouting process: set eye position → drill hole → check drilling quality → install grouting pipeline → prepare slurryLiquid → open pump for grouting.
(4) When grouting hole sealing operation, first connect the grouting pump, grouting pipe and mixer in good condition, and ensure that it canNormal operation.
(5) "two plugs and one note" shall be adopted for drilling and sealing, I .e. the two ends of the sealing section shall be plugged with Marie powder, and thenThe middle section adopts cement grouting under pressure.
(6) When drilling and grouting hole sealing operation, first clean up the floating cargo in the hole, and then send the PVC sealing pipeTo the bottom of the hole, in the appropriate position buried flower pipe, 20m away from the orifice before and after the use of Mary powder sealing tight, andBuried grouting iron pipe grouting sealing hole, grouting pipe length is not less than 2m, diameter is Ф 12.5mm, with pressure grouting straightUntil the borehole is sealed tightly.
(7) Grouting operation must be stopped immediately after returning slurry is found in the grouting process. After 2 hours, the cement slurry will setAfter the solid and volume decrease, make up grouting again until the end of grouting.
(8) After grouting, the cement can be completely solidified after at least 24 hours before pumping and connecting pipes.
(9) After drilling and sealing are completed, all connecting pipes of the sealing pump must be cleaned with clean water so as to be used next time.Use.
Maintenance and maintenance of (VI) drilling rig
(1) During the use of the drilling rig, it must be kept clean, intact, fully functional, sensitive and reliable, andRoutine maintenance and regular overhaul.
(2) During shift change, it is necessary to check whether each operating handle is sensitive and reliable and whether the pointer of each pressure gauge is correct.Indicate the pressure, whether the hydraulic system leaks, and deal with the problems found in time.
(3) When the drilling rig has been in normal operation for 3 months, check the oil quality in the oil tank once; if it is not qualified, the oil should beAll release, and clean the oil tank, filter, fill the new hydraulic oil.
When the oil temperature is too high, check the following parts:
(1) Whether the oil quantity in the oil tank meets the requirements. If the oil level is lower than the lower limit of the oil level indicator, it should be replenished in time.
(2) If the oil circuit resistance is too large, check whether each quick-change self-sealing joint fails and whether the coarse-fine filter is blocked;Otherwise, it should be cleaned, repaired or replaced in time.
(3) Whether the water volume of the cooler meets the requirements; otherwise, the cooling water volume should be increased or the cooler should be replaced.
(4) Observe the pressure gauge on the console to judge whether the pressure is overloaded; if overload occurs, adjust the sectionFlow valve, reduce the drilling speed, reduce the load.
(5) The hydraulic chuck and holder shall be cleaned and replaced frequently to ensure flexible and reliable movement of the slips.
(6) Check the hydraulic system at any time for oil leakage and water braid leakage. If there is any leakage, it should beReplace the seal when necessary; sufficient wearing parts shall be prepared at the drilling site for replacement.
(7) Open the cover of the gyrator every 3 months to check the gears and lubrication in the box. The main inspection gears areNo pitting, wear, lack of lubricating oil, etc., found that the problem must be handled in a timely manner.
Treatment Measures of Smoke in (VII) Drilling Construction
1. Air slag discharge
Stop drilling → stop air supply → open the water supply valve and supply water to the borehole by quantity; the drill pipe (head) is blockedWhen it is plugged, use a water pipe to flush water directly into the orifice; if the aperture is large enough, extend the water pipe and plug it into the hole to inject water →Use small plates, wrenches, drill rods and other tools to surround the drill pipe with wet cotton yarn and plug it tightly into the drilling hole → personnel stand on the air inlet sideObservation shows that there is no smoke in the orifice and the gas concentration in the roadway is lower than 1.0 → drill back under the supervision of the tile inspector →Timely sealing the hole and connecting pipe drainage; The smoke volume in the borehole cannot be effectively controlled, and the gas emission is abnormal → notify the site tileInspector → power failure, evacuation according to disaster avoidance route → report area dispatching → district dispatching report mine dispatching.
2. Water slag discharge
Stop drilling → Use small plates, wrenches, drill rods and other tools to surround the drill pipe with wet cotton yarn and plug it into the drill hole.Blocking is strict, flushing water against the orifice with water pipe → personnel standing on the air inlet side to observe, the orifice is smokeless and returns, roadwayThe internal gas concentration is lower than 1.0%→ drill back under the supervision of the security inspector and tile inspector → timely seal the hole and connect the pipe for drainage; drillThe amount of smoke in the hole cannot be effectively controlled, and the gas emission is abnormal → notify the on-site tile inspector → power failure, and press the disaster avoidance road.Line withdrawal → reporting area dispatching → district dispatching reporting mine dispatching.
3. Precautions
In the process of dealing with drilling smoke, the operator must stand on the air inlet side, and it is strictly forbidden to face the orifice.
4. considerations
(1) Drilling shall be carried out in strict accordance with the drilling construction design.
(2) When using a hydraulic gripper drilling rig, it is strictly forbidden to clamp the drill pipe with the gripper for reverse operation to prevent the drill pipeDisjoint due to reversal at the joint.
(3) During the drilling process, ensure that the drilling rig advances evenly to prevent the drill pipe from breaking and drilling due to excessive force.Displacement occurs.
(4) When returning the drill pipe, it must rotate forward and backward. It is strictly forbidden to break (take off) the drill due to non-rotation or reverse and backward.Rod.
(5) In the process of drilling and drilling back, the roughneck must pay attention to the tension of the clamping column and hand-cranked column returning device at any time,When looseness is found, the drilling must be stopped in time for reinforcement, otherwise it is forbidden to continue construction.
(6) The drilling rig driver must always pay attention to the oil supply pressure, rotation speed and propulsion speed during the drilling processChange situation; suddenly found that the oil supply pressure of the drilling rig becomes higher, the rotation of the drilling rig becomes slower and it is difficult to push and return the coal.When the slag (rock) volume decreases and the drilling rig vibrates greatly, the drilling must be stopped.
(7) In the process of using fishing tools to fish the drill pipe in the hole, water must be supplied to the hole, otherwise it is strictly prohibited to fish.Fishing; personnel are prohibited from observing the orifice and must stand at a safe place on the side of the drilling rig for operation.
(8) When it is confirmed that the residual drill pipe in the hole cannot be salvaged after fishing, it must be reported to the dispatching area before returning it.Take out the fishing drilling tool and seal the hole before moving, stabilizing and drilling; the hole sealing personnel must stand on the side of the hole opening to operate.For, one person to view the mountain, personnel are strictly prohibited from facing the orifice, in case the remaining drill pipe in the hole suddenly slipped out and hurt people.
(9) When the drill pipe is disconnected or disjointed outside the hole, the drill pipe must be fixed on the anchor rod and anchor with hooks and wire ropesCable, shed and other solid points.
(10) The drilling with drill pipe remaining in the hole shall be subject to listing management, and the team shall make a ledger in time to ensure thatThe safety of personnel in the mining process of the mining face.
(11) In the process of construction drilling, attention must be paid to the situation of adjacent drilling and orifice;When the water or outlet increases or the wind returns, the drilling must be stopped and the hole must be drilled back and sealed in time.
(12) During the drilling process, pay attention to the temperature changes of each operating part at any time; if there is any abnormality,You must deal with it before you can continue working.
(13) During the drilling process, pay attention to observe whether there is oil leakage in the components, rubber hoses and pipe joints of the hydraulic system.For example, whether the mechanical connecting parts, fastening and anchoring parts are loose, otherwise they must be shut down for treatment.
(14) During the construction of this layer or through-layer drilling, when the phenomenon of top drilling, sticking and injection hole occurs, the drilling must be stopped,The personnel shall stand on the air inlet side outside the possible range of the spray hole, observe the situation of returning air or water, and check the gasEmission situation: the return wind or water is normal, and the gas concentration in the roadway is less than 1.0%, so drilling can continue. No return windOr do not return water, return wind, return water is not normal, roadway gas concentration reached 1.0% and above, must stopOperation of drilling rig; drilling can be continued only when gas concentration drops below 1.0%. The driller must observe the return at all times.Wind or backwater conditions.
(15) When dealing with drilling rigs or other things that require percussion of drilling rigs and drill pipes, portable tile inspectors must be used.Check the gas concentration within 20m around the knock; knock can only be performed when the gas concentration is less than 1.0%.
(16) in the process of construction drilling, when there is an outstanding sign, must immediately withdraw to the designated route according to the disaster avoidanceAfter the safe place, and timely report to the district dispatch.
(17) When drilling through goaf, water nest and water silo, and omens of water penetration are found, the person in charge of on-site safetyOrganize personnel to evacuate to the designated safe place according to the disaster avoidance route and report to the district dispatch in time.
(18) During drilling, drill pipes and metal supporting materials (anchor rods, anchor cables, steel ladders, metal sheds,When barbed wire, etc.) or other metal objects rub against each other, it is strictly prohibited to continue drilling in, and the opening must be re-selected.Location drilling.
(19) During the drilling process, construction personnel are strictly prohibited from wearing gloves, surrounding towels or cotton yarn, and labor protection materials must beWear good clothes.
(20) In the process of drilling, if the nozzle hole is serious, personnel are prohibited from passing through or within the scope of the nozzle hole.Work within this range.
(21) During the operation of the drilling rig, if any personnel need to pass through the construction site, they must communicate with the construction personnel.Contact well, stop the operation of the drilling rig, and set the operator to zero position; it is forbidden to start before the personnel pass safely.Move the drilling rig.
(22) When sealing the hole, the sealing personnel must wear qualified goggles and masks, and must not stand in the holeface operation.
(23) During sealing, the grouting pipe must be tied to the firm point of the orifice edge with iron wire.
(24) When injecting pressurized air into the sealing pump, it must be injected slowly, and it is forbidden to hit the air inlet valve in place at one time;When the pressure is relieved, the construction personnel are prohibited from facing the exhaust port.
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