Research On Roadway Support Technology Under The Condition Of Dynamic Pressure In Lingxin Coal Mine

The control of roadway stability under the condition of dynamic pressure is one of the problems constrainting safe and efficient coal mining.L3515 roadway in LingXin coal mine of Shenhua Ningxia Coal Industry Group has a conditions of poor occurrence surrounding rock,by the upper part of the dynamic pressure of coal mining, large deformation of surrounding rock has occoured,roadway is difficult to control, which leads to a waste of human,material and financial resources.In this thesis,theoretical analysis,laboratory experiment,numerical simulation and field monitoring methods are used to settle the problem of roadway support under the condition of dynamic pressure,the parameters of technical bolting are optimized and the program is adjusted.The laws of mining tunnel in different rock strata under are comparatively analysed to optimize and determine the support scheme of L3515 roadway.The targeted on-site monitoring methods are proposed and implemented, the pressure laws of the tunnel during the pre-excavation,after-excavation and after one or two mining activities are comprehensively analysed,the results show that high pre-fixed bolting technology has a good adaptability to the roadway and achieves the desired results.The research results have be successfully applied to linxin coal mine of Shenhua Ningxia Coal Industry Group in the L3515 roadway,obtaining a good technical and economic results.which provides reference for the roadway stability control in the similar conditions on the roadway.