Ground Pressure Monitoring and Result Analysis of Gob-side Entry Driving in Nanzhuang Coal Mine
Nanzhuang Coal Mine studied and tried the high-efficiency bolt support technology with large spacing in 8824 working face,and applied the fast support parameters of bolt length of 3 m and mesh of 1.1 m.In order to verify the rationality of the parameters,Nanzhuang Coal Mine carried out the monitoring of the displacement of the two sides of the roadway,the monitoring of roof separation,the monitoring of the working load of the anchor rod,the monitoring of the deep base point of the coal body and the monitoring of the peeping hole in the 8824 working face.The monitoring results show that the maximum displacement between the two sides is 118 mm,the maximum subsidence of the roof is 95 mm,the roadway is relatively stable,and the maximum load of the roof anchor cable and the maximum load of the anchor rod are less than the breaking load,which shows that the high-efficiency anchor rod support technology with large spacing can effectively control the deformation of surrounding rock and can be applied to coal mine roadway support under this geological condition.
roadway supportdisplacement monitoringroof separationanchor working load
NETL
NSTL
万方数据
维普
