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23
2022-12
Comprehensive mechanized coal mining technology
Comprehensive mechanized coal mining technology
2022-12-23
23
2022-12
Roadway layout for inclined mining and inclined mining
Roadway layout for inclined mining and inclined mining
2022-12-23
23
2022-12
Applicable conditions of inclined longwall coal mining method
Applicable conditions of inclined longwall coal mining method Whether it is arranged as an inclined longwall working face mainly considers the size of the coal seam dip angle, and secondly considers the geological structure. characteristics, focusing on the distribution law of faults and ensuring that the working face has sufficient continuous advancing length. (1) According to the current equipment conditions, the inclined longwall coal mining method is mainly applicable to the inclination angle of less than 12 degrees. Coal seams should be the focus of popularization and application; (2) when the coal mining face equipment to take effective technical measures, can be applied to 12 ° ~ 17 ° When the dip angle of the coal seam is about 20 °, only a few mines are used now and need to be improved; (3) For the area with more inclined and oblique faults, it can be roughly divided into more regular zones. The inclined longwall coal mining method or the pseudo-inclined longwall coal mining method can be used. Other factors have less influence on the use of inclined longwall mining. When necessary, to carry out technical and economic ratio. and finally determine the coal mining method.
2022-12-23
22
2022-12
22
2022-12
Longwall face coal mining method and roadway layout-roadway name
Longwall face coal mining method and roadway layout-roadway name
2022-12-22
22
2022-12
22
2022-12
Development Law of Overlying Strata in Coal Mining Face in Working Face Advancing Direction
Development Law of Overlying Strata in Coal Mining Face in Working Face Advancing Direction
2022-12-22
22
2022-12
Zones of the rock stratum above the goaf space of the coal mining face
Zones of the rock stratum above the goaf space of the coal mining face
2022-12-22
14
2022-12
Bearing pressure on the upper and lower sides of the coal face and near the original cut
Bearing pressure on the upper and lower sides of the coal face and near the original cut
2022-12-14
14
2022-12
Distribution of bearing pressure around coal mining face
Distribution of bearing pressure around coal mining face
2022-12-14
