Strata-pressure Behavior In The Conditions Of Different Coal Pillar Sizes In The ChaiGou Coal

This paper mainly focuses on the influence of strata-pressure behaviour which is caused by the dimension of coal pillar in the process of whole seam mining. First, with theoretical analysis we deduce the mechanics model of coal pillar’s overlying load and the standard of division and confirm the supporting condition of overlying strata. And then we build up kinds of elastic thin plate mechanical models of roof pressure. On the basis of the results we regard the key strata as research object and get the confirmed height of caving zone. Secondly, through the physical simulation tests we analyse the fracture and collapse law of overlying strata in the process of whole seam mining. Eventually, we verify the correctness of corresponding theoretical analysis and physical simulation tests results by applying computer simulation tests.