Research on the Law of Mine Pressure Behavior in Close Distance Coal Seam Laminated Layer Fully Mechanized Caving Face
Aiming at issues such as the movement and damage of overlying strata and the law of mine pressure behavior in close distance coal seam laminated layer fully mechanized caving mining and so on,taking the 842 first fully mechanized caving face in Wobei Coal Mine as the engineering background,similar simulation experiments and numerical analysis methods are used to study the working face mining process.The results show that under similar simulation experiments,the height of the overlying rock caving zone is 38 m,the height of the fissure zone near the open cut is 103.8 m,the height of the fissure zone near the stop mining line is 95.4 m,the initial pressure step distance of the basic roof is 28 m,and the periodic pressure step distance is 17.5 m.The numerical analysis shows that the displacement field and stress field of the surrounding rock in the stope are quite similar,and the distribution characteristics of the support pressure in front of the stope are consistent with the results of similar simulation experiments.The research results can provide technical guidance for the design of coal pillar width and working face support parameters in close distance coal seam laminated layer fully mechanized caving face.
close distance coal seamlaminated layerfully mechanized cavingmine pressurelaw
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