Optimized support technology of combining long and short anchor cables for mining roadway passing through fault
In view of the problems such as broken surrounding rock,difficult support and serious deformation of roadway when the 42226 haulage trough passes through a fault in Chaijiagou well of Yuhua Coal Mine,the existing problems of the o-riginal support scheme are analyzed,and the combined support scheme of long and short anchor cables is proposed and the support parameters are optimized.The field measurement shows that the surrounding rock begins to stabilize after 20 days.The maximum subsidence of the roof is 158 mm,the maximum floor heave is 92 mm,and the maximum shrinkage of the two sides is 166 mm,which are 21.9%,16.4%and 25.5%of the original deformation,respectively.After 13 days,the stress of the roof and two sides of the anchor cable gradually stabilized at 275～285 kN,with a small amplitude of vibration,and the bearing capacity is still largely surplus.The deformation of the surrounding rock of the roadway has been effectively con-trolled,which can meet the needs of safe production.
mining roadwaypass-through-faultcombined supportsurrounding rock controlsurrounding rock plastic area
国家科技期刊平台
NSTL
万方数据
维普
