Abstract:
In order to visually study the relationship between support and surrounding rock in coal mine, based on the CDEM numerical simulation software, a numerical model consistent with the actual physical process of “working face advancing-roof strata movement” is established to realize the two-dimensional dynamic numerical simulation of the coupling between the support and the surrounding rock in the mining working face.Based on the conditions of 12311 mining working face of Dawan Coal Mine, the overburden structure movement and ground pressure law of mining working face in shallow coal seam are studied.The results show that there is little difference between the working pressure of the support during the initial and periodic weighting of the basic roof breakage.The area affected by the advance pressure is within 2.0~3.0 times of the mining height before the working face.The average working resistance of the support under the initial and periodic weighting of the basic roof of the working face is 9.0~11.0 times of the weight load of the rock stratum at the mining height.The simulation results are consistent with the field monitoring data, which provides a new research method for studying the support-surrounding rock relationship.