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22
2020-07
Intelligent coal mining, the latest top video!
Intelligent coal mining, the latest top video!
2020-07-22
22
2020-07
22
2020-07
Restructuring of Coal Enterprises, Another City
On July 17, Jizhong Energy Group held a meeting of leading cadres. Announced that Jizhong Energy Group has decided to implement a joint reorganization between Xing Mining Group and Shanxi Jizhong Company, and at the same time inject the shares of the coal company held by Jing Mining Group and Zhang Mining Group into Xing Mining Group; announced the reorganized leadership of Xing Mining Group.
2020-07-22
22
2020-07
Shaanxi Coal Group, the mining area with the most severe impact ground pressure, was born.
On July 15, the on-site meeting of Shaanxi coal mine rock burst disaster treatment was held in Binchang mining area of Shaanxi coal group. The meeting conscientiously conveyed the spirit of instructions and instructions from the leading comrades of the CPC Central Committee, the State Council, the provincial party committee, and the provincial government, and comprehensively arranged and deployed the prevention and control of rock burst disasters in coal mines. The meeting requested to further unify thinking, clarify responsibilities, arrange tasks, and jointly do a good job in "top-level design", take goal-oriented, problem-oriented, take immediate action, persevere, and combine the three-year action plan for coal mine safety to crack the rock burst technology The plan is the first priority, and new results have been achieved in comprehensive disaster prevention and control.
2020-07-22
22
2020-07
Knowledge Popularization on Upper Corner of Return Air in Fully Mechanized Coal Mining Face
What is the upper corner of return air in coal mining face? The corner (yu, second tone) means the corner, and the corner refers to the corner position. The upper corner is generally a mining noun, which refers to the return air side of the coal mining face and the triangular zone near the upper side of the return air lane and the edge of the goaf. The ventilation in this area is not good, the temperature and humidity are high, and it is easy to accumulate the gas released by the intersection of goaf and mining face, and the gas concentration is high. It is the focus of gas prevention and control in working face.
2020-07-22
22
2020-07
Warm Tips of Yikuang Science and Technology -60 Things to Do during the Great Summer Heat
When the summer heat arrives, the summer is thick! Today is the heat, It means the roast day of the year is coming ~ The season of love and hate, 60 things we can do, Each piece is summer limited, One less is not perfect!
2020-07-22
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2020-07
Introduction of ZDY1200L crawler type full hydraulic drilling rig in underground coal mine
ZDY1200L crawler type full hydraulic drilling rig belongs to self-propelled, low speed, small torque type drilling rig. Equipped with electromagnetic starter, through the carbody turntable can adjust the drill hole direction. It is suitable for coal mine underground using spiral drill pipe and outer flat drill pipe to construct gas drainage drilling and water exploration and drainage drilling. Drilling depth: 100/200M matching drill pipe diameter: 78, 88 (spiral drill pipe),50/42 (outer flat drill pipe) maximum torque: 1200 rotation speed: 80~280 maximum feed overpull force: 45 feed stroke: 1000 spindle inclination angle: can be modified to -10~60 azimuth adjustment: 13
2020-07-22
22
2020-07
Introduction to Underground Tunnel Drilling
There are many kinds of underground mineral resources in China, and the geomorphic geological structure of many metal deposits and rare metal deposits are relatively complex in terms of ore body morphology and grade changes. In order to obtain reserves above grade C, it is necessary to use a combination of surface drilling and underground tunnel drilling to reach them. Underground tunnel drilling refers to the drilling work of drilling holes at different angles in narrow underground tunnels with special drilling rigs. Compared with surface drilling, tunnel drilling is mostly a full range of small-diameter shallow holes. We know that surface drilling due to the topography of the ore body morphology and other conditions, often through a very thick cover layer to control the ore body. While using tunnel excavation to control the ore body
2020-07-22
22
2020-07
Do you know the matters needing attention of rotary digging machine drill pipe
Precautions for Use of Drill Pipe of Rotary Digger? Drill pipe and drill bit can only be used for drilling pile hole, and are not allowed to be used for soil transfer, handling or leveling of construction site. Never immerse the drill in liquid concrete. The drilling operation can only be started when the drill bit touches the bottom of the hole. When drilling into sand layer or pebble layer, the driver should pay special attention to it. When drilling, the footage should not be too deep at one time. Otherwise, the hole wall will shrink, so that there will be no gap between the barrel wall of the drill bit and the hole wall, which will cause the drill bit to fail to reverse or lift, causing major accidents such as sticking. According to the geological environment, to select the appropriate drilling bucket. Selection of suitable and geological requirements of the drilling bucket, both to improve the work
2020-07-22
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2020-07
Rotary Excavator Drill Pipe Configuration Scheme
Drilling rod configuration skills of rotary digging machine: 1. During the construction of rotary digging machine, the drilling rod shall be locked by the machine for drilling hard strata and the drilling rod for drilling soft strata shall be strictly observed. 2. When the user determines that a certain formation needs to be drilled for a long time, it is recommended to configure two sets of the same drill pipe for alternate use, so that the drill pipe can be maintained and repaired in time to ensure the user's construction progress. 3. Due to the special geology, it is necessary to use drill pipe to resist torsion. When the compressive capacity is less than the output of the drilling machine, appropriate measures must be taken to protect the drill pipe of the rotary digging machine from damage. 4. When using the drill pipe of the rotary excavator, the user must first understand the instructions to avoid wrong operation.
2020-07-22
