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Ventilators should know and be able to-gas inspectors
Release time:
2023-01-09
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Ventilators should know and be able to-gas inspectors
Gas inspector
1. induction conditions
(1) Gas inspectors must pass professional and technical training and take up their posts with valid certificates.
(2) Gas inspectors must master the "Coal Mine Safety Regulations" on air volume, gas concentration, temperature andProvisions for gas inspection.
(3) Be familiar with the performance and parameters of the instruments used.
(4) Be familiar with the mine ventilation system and master the relevant knowledge of the air volume required by each air use location and coal and gas outburst.Knowledge.
(5) familiar with the gas, carbon dioxide emission mechanism and law, as well as the coal mine gas, coal dust explosionKnowledge and mine disaster avoidance routes.
2. preparation
(1) Prepare the instrument. When going down the well, gas detector, leather hose, thermometer, inspection report and otherThe specified instruments and appliances.
(2) Check the components of the gas detector to be carried, and ensure that the components are complete and the gas path is smooth.The circuit is intact and the spectrum is clear.
(3) Check whether the drug is invalid: check the calcium chloride or silica gel installed in the absorption tube and the additional absorption tubeThe absorption capacity of soda lime, drug particle diameter of about 3~5mm.
(4) Air tightness inspection. First of all, check the suction balloon, pinch the suction balloon with your right hand and hold the suction glue with your left hand.Tube, if the suction balloon does not expand and restore, it means that the suction balloon does not leak. Secondly, check whether the instrument leaks,Connect the suction balloon rubber tube with the suction hole of the gas detector, block the air inlet with one hand, and pinch the other hand to inhale.The ball will not rise and restore within 1min after loosening the hand that squeezes the flat balloon, indicating that the gas detector will not leak air. FinallyCheck whether the air path is unblocked, release the air inlet, pinch and release the balloon, and the balloon is in good condition when it is deflated.If the gas leakage, gas path is not smooth, need to find out the reason for treatment, repeat the above steps.
(5) When checking whether the interference fringes are clear, observe by the eyepiece, press the power button, and rotate the eyepiece at the same timeAdjust the visibility until the observation number is the clearest, and then see if the interference fringes are clear.
(6) Calibrate the instrument.
(7) Clean the air chamber with fresh air; Before entering the workplace, each shift must re-match the zero position and the indicator line.Composite, then press the power button, turn the thick handwheel, from the eyepiece, put the blackest one orEither one of the two black lines is aligned with the zero line on the reticle, and the black line at the zero position is calibrated,Screw on cover.
3. operation method
(1) The zero gas detector will be adjusted to check the gas and carbon dioxide. When checking the gas, measuring the groundThe point should generally be 200mm below the shed beam near the roadway. In the roadway with roof fall, the rubber pipe should beExtend into the height of the roof fall, and check from low to high gradually upward. The head of the inspector must not extend into the height of the roof fall,To prevent suffocation from lack of oxygen.
(2) Press the coarse counting button, watch the eyepiece, check the moving position of the original zero black line, and read the integer.
(3) Press the precision button, turn the micrometer handwheel, move the zero black line to the integer position, and then check the engravingThe readings on the dial are decimal places, and the sum of integers and decimals is the gas concentration at the location.
(4) When checking the carbon dioxide concentration, use the carbon dioxide absorption tube to check the mixed gas according to the above operationconcentration (concentration of gas and carbon dioxide). Read the mixed gas concentration value and subtract the measured pointThe gas concentration is multiplied by the correction factor, and the resulting number is the carbon dioxide concentration at that point.
(5) Check the temperature of the measuring point with a thermometer.
(6) When checking other gases with a multi-gas detector, first pump the piston back and forth at a constant speed at the place to be measured5~6 times, so that the original gas in the detector is completely converted by the gas to be measured;Check that the glass seals at both ends of the gas calibration tube are opened, and insert the inlet end into the socket of the calibration device;Then set the three-way valve to the ventilation position, push the piston at a constant speed, and according to the ventilation volume andTime, evenly send the gas sample to the calibration tube; According to the scale of the discoloration ring generated on the calibration tube, read outThe concentration of the gas sample. When measuring carbon monoxide, the blasting time should be avoided to prevent the drying of carbon monoxide in the gun smoke.Disturbance.
(7) After checking the gas, carbon dioxide and other gases and temperatures, the gas inspector shall check the results in a timely mannerWrite into the gas inspector manual, then fill in the gas inspection board at the inspection site, and finally put the inspection resultsNotify the site operation personnel and report the dispatch.
(8) The gas inspector shall also inspect the use of ventilation facilities and dust-proof facilities along the way.Timely handling and reporting of current problems.
(9) Tour inspection of other locations, the specific operation in accordance with the above provisions.
(10) The gas inspection data on duty shall be matched with "card board", "manual" and "ledger.
(11) The gas inspection in the coal bunker and the gas inspection and treatment after the bunker is blocked shall be carried out according to the chief engineer of the mine.The measures formulated by the organization shall be carried out by the mine rescue team.
(12) When blasting and caving in goaf of coal mining face, the inspection range of gas concentration in goaf shall be in accordance with the total mineThe measures prepared by the engineer shall be implemented; when the gas concentration exceeds the limit, the blasting shall be stopped immediately.
(13) When checking gas at a temporary shutdown location, two people must go together, carry an oxygen detector, andTwo people 4~6m apart, from the outside to check the gas and oxygen concentration at any time.
(14) For possible gas accumulation areas, gas inspection must be carried out;Stop work, withdraw personnel, cut off power supply, handle and report to dispatcher.
(15) When the main ventilator stops running due to power failure and maintenance in the mine, or when the ventilation system has a significant occurrence.After the change (damage), all affected sites must be inspected by gas inspectors and confirmed.Work can be resumed after there is no danger.
(16) Gas inspection during electric welding and gas welding shall be carried out in accordance with the safety measures prepared.
4. the operation of checking gas in special places
(1) In high gas and coal and gas outburst mines, the use of shearers and roadheader mining face heelGas inspectors must stick to their posts.
When the shearer and roadheader are working, the tiles should be checked at the following locationsS:
① Check the gas within 20m before and after the shearer, 300mm from the coal wall and 200mm from the roof;When the local accumulated gas concentration reaches 2% or the gas concentration in the air flow within 20m before and after the shearer reaches 1.0, it must bePower supply of shearer and working face shall be shut down and treated immediately;
② Use inspection staff and rubber hose to inspect coal miningGas between machine drums, 300mm from coal wall and 200mm from roof, when locally accumulated gasWhen the concentration reaches 2%, the shearer must be stopped and the power supply of the working face must be cut off for treatment.Treatment, should immediately report to the ventilation dispatcher;
③For the heading face, the motor of the heading machine should be checkedGas concentration in the air flow within 20m nearby and between the outlet of the air duct and the coal wall; when the gas concentration reaches 1.0%Or when the gas concentration in the return air flow of the heading face reaches 1.0%, the heading machine must be stopped and the working face must be cut off.Power supply, withdraw personnel to deal with immediately; If it is impossible to stand up, it shall be reported to the ventilation dispatcher immediately.
(2) The gas inspection in the coal bunker and the gas inspection and treatment after the bunker is blocked must be carried out according to the chief engineer of the mine.Organize the preparation of measures.
(3) Gas inspectors must conscientiously implement the "one gun and three inspections" system, and gas inspectors are not allowed to be on site.Blasting.
(4) In the mining face of coal and gas outburst mines, gas inspectors must inspect gas and otherHarmful gas and temperature, etc. Locations requiring fixed-point inspection, including the edge of the goaf of the coal mining face,Face air flow, working face return air corner, working face scraper conveyor and scraper conveyor near the tail and bottom,Local roof leakage, high caving, heading face, roadway airflow, local high caving, roof leakage, bureaunear the ventilator, etc. When it is found that the limit is exceeded, the work must be stopped immediately, the power supply must be cut off, and the treatment must be carried out.Can not immediately deal with, should immediately report to the ventilation control room.
(5) When blasting and caving in the goaf of coal mining face, the inspection range of gas concentration in the goaf must be in accordance with the total mineThe relevant provisions of the measures prepared by the engineer shall be implemented, and when the gas concentration exceeds the limit, it must be stopped immediately.Blasting.
5. considerations
(1) strict duty call system and shift signature system, put an end to fraud, empty class missed inspection phenomenon.
(2) The mining working face shall be inspected at least 3 times per shift; Electromechanical chamber, unmanned working area and coal bunker up and downMouth, check at least once per shift.
(3) Fill in the gas plate carefully, with standard handwriting and accurate data.
(4) When using the gas detector to check the gas, check the number of portable gas detector and gas sensorAccording to, found that the error exceeds the regulations, immediately report and make records.
(5) Strictly implement the management system, and find "one ventilation and three prevention" problems in the walking route (such as open wind door,The distance between the air duct and the working face exceeds the regulations, the explosion-proof facilities fail, the water curtain is stopped, the fan stops running, etc.), mustStop or notify the rectification, and report to the dispatching room.
(6) Problems found during patrol inspection (abnormal gas, wind stop, etc.) must be handled in time when they can be handled;If it cannot be handled, it must be reported to the dispatching room and kept on site.
(7) The tile inspector must hand over the shift at the specified place, and must hand over the situation of the shift and pay attention to it after work.The problem.
(8) when checking the gas, each reading shall not be less than 5 times, each inspection point shall not be less than 3 points, take the mostLarge values are used as the basis for processing.
(9) When checking the gas, carbon dioxide and other harmful gases outside the waste lane, blind lane and closed wall, onlyCheck at the fence; when it is necessary to enter the blind lane for inspection, formulate special measures and check by the ambulance team;If the blind lane work is resumed, gas discharge measures must be formulated and the work must be carried out according to the measures.
(10) due to failure and other reasons of temporary power outage wind, need to check the temporary wind roadway to restore ventilation, canThe gas worker, the shift leader and the security inspector shall carry out the inspection together, one for inspection and two for supervision.When the gas concentration reaches 1.0 or the carbon dioxide concentration reaches 1.5, stop moving forward andExit, fence, reveal warning signs, and report to the ventilation control room. Then develop gas emission measures, rootAccording to the gas emission classification management regulations, the discharge shall be carried out according to the requirements of the measures.
(11) If the main ventilator is suddenly cut off or cut off, the personnel in the affected area shall be notified in time to cut off the power supply,Withdraw personnel to the air intake tunnel, set up fences, reveal warning signs, and report to the mine control room and ventilation control room,Work as instructed.
(12) If the gas exceeds the limit, immediately notify the personnel in the overrun area to stop working, cut off the power supply and withdraw.Personnel, set up fence warning signs at all entrances leading to the overrun area, and find out the reasons and report them in time.The air dispatching room and the on-duty leader shall discharge the gas according to the regulations after receiving the instructions of ventilation dispatching.
(13) If an abnormal wind flow is found, work in the area of abnormal wind flow must be stopped immediately and the cause must be found out,Report to the ventilation control room in time.
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