Deformation Characteristics Of Tunnel Walk Rock Of Horsehead And Bracing Optimization Research On Qianyingzi Mine

Coal is the main energy resource and important industrial raw material in our country, With the development of national economy, the need of coal is increasing day by day. So it's necessary to build some large-scale pits to develop the economy. In addition, the resources of good exploit condition are nearly exhausted after a long-term and extensive exploitation. In this regard, the way to increase yield is to mine those resources, which lie hidden in the earth and has a terrible existence condition .it means that the exploit in future will go on in such high ground pressure and bad wall rock circumstances. The part of horsehead is the difficult key point for its significant location, large cross section, long servicelife and it's complicated stress suffering condition..This passage is based on the bracing design optimization of air pit horsehead of Qianyingzi mine of Wanbei coal-electricity corporation, and details as bellow:â‘ We penetrated in its wall rock deformation characteristics of horsehead.â‘¡We mastered its stress characteristic, deformation characteristic, and pressure and displacement characteristic of wall rock, by monitoring on the spst.â‘¢We made a research on the characteristic of motive force and displacement space of horsehead, wall rock and advanced the plan of support optimization.â‘£We operated a numerical value simulation on the support and mechanic characteristic of wall rock, according to which, we designed support plan and optimized support parameters.On the basis of these tasks, we gain these consequences:â‘ Stress space characteristic of horsehead wall rock of Qianyingzi mine.â‘¡The support optimization plan.â‘¢The bracing optimization design.The achievement has a leading meaning on the bracing design of horsehead in deep well.