Research On Supporting Technology Of Roadway Of Qingshuiying Coal Mine

Qing shuiying Coal Mine of Shenhua Ningxia Coal Industry Group Ltd., locates in Ningdong mine, its geophysical and geological environment are very complex, joints and fracture of the rock are developing, and contains much water.And where rock mass deformation seriously, excavation disturbing caused rockmass support difficultly.All of these constrained and influenced safety in production. Therefore, it is great urgent to research on integrated supporting technology of dynamic mining pressure roadway,and that will make a great significance for the safety of coal mine.This paper aims the stability of the 110202 transporting-roadway, the deformation and failure characteristics of roadway in complex surrounding rocks are analyzed with the observation, the theoretical analysis and the computer simulation.It is pointed out that the main reasons of supporting failure are the special engineering geology conditions and affections of dynamic mining pressure. An integrated supporting technology of bolt-mesh-cable supporting together with high strength steel supporting and grouting consolidation are introduced based on these failure characteristics and the general concept of integrated controlling. In addition, the research is applied to engineering practice. The field observation shows that the floor heave and the roof crush can be controlled effectively by strengthening roof and sides and increasing bolts in sidewalls and floor corner of roadway.