Width of strip branch roadway for recovering overlapping coal by strip filling green mining method
Based on the No.3 coal strip backfilling face in Shanxi Sanyuan Coal Industry,we analyzed the deformation and stress characteristics of the branch roadway roof by strip backfilling mining in terms of clamped beam theory model.The numerical simulation method was used to reveal the interaction between the branch roadways by strip backfilling mining in cycle interval,and the distribution characteristics of plastic zone in branch roadway wall rocks.According to the theoretical analysis results and the actual conditions of the backfilling working face of Sanyuan Coal Industry,the rational width of the branch roadway for multi-round cyclic interval strip backfilling mining was determined to be 5 m.By engineering practice,the width was verified and the overburden coal resource was safely recovered,which promote green and sustainable mining of Sanyuan Coal Industry.
coal resources under buidingsstrip backfillinggreen miningclamped beam modelbranch roadway width
万方数据
维普
