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.
关键词
压覆煤炭资源/条带充填/绿色开采/固支梁/支巷宽度
Key words
coal resources under buidings/strip backfilling/green mining/clamped beam model/branch roadway width
维普
万方数据