Roadway Supporting Control with Extra Thick and Soft Coal Seam in Deep
To some characters of high crustal stress, low bearing capacity of coal, seriously convergence of roof to floor and two sides of roadway with extra thick coal seam in deep, it tacking 2304N extra thick coal seam roadway as engineering background of Xinjulong coal mine, and then combined method of field survey and number simulation were applied, the influence principle of supporting parameters to roadway control, and some effectively schemes were put forward, and reinforce zone was formed within rock with pretension bolt, net and steel strip, the stress state of rock was improved, roadway roof was controlled by long length cable and cable bridge, roof subsidence was controlled. Surrounding rock shearing capacity was improving and then two sides deformation was controlled by cables layout at upper corner and two sides. And then the schemes were applied in field, the effectiveness of supporting scheme was verified by field monitoring and bore observation.
in deepextra thick coal seamroadway supportingFLAC3D
NETL
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万方数据
维普
