Adhibition Study On Coal Pillar Rotary Mining Under Complex Conditions L Island

In good working rotation mining geological conditions research is case studyrevolving mining is widely applied in our country at present. This paper studies theworking face under the complex geological conditions spin recovery problems andtheir solutions.This article is based on axis ShenJiaZhuang coal mine2109L island coal pillarmining face as the background of the line of research, axis ShenJiaZhuang as anadvocate of coking coal mine, with the increase of mining intensity, coal resourcesless and less, to extend the service life of mine at this time, try to improve theextraction rate became the key work of mine, a lonely island coal pillar generallymore complex geological conditions, how to island coal pillar safe mining undercomplex geological conditions become a solution to solve this problem. Implementssolid rotate for2109L island coal face mining technology, under the complicatedcondition of the working face of safe mining and roadway supporting technologyresearch, establish the l-type isolated working face by FLAC3D model, analysis thechange of stress field and displacement field before and after the island coal pillarmining and influence, finally choose L the joint rotation mining of mining method.And USES FLAC3D to simulate the surrounding rock mass in the process of miningface the change of the stress and displacement, demonstrates the rationality of theselected supporting roadway, the way, and to face the old and waste of coal aresimulated and analog simulation, based on the testing point of the stress anddisplacement changes to optimize roadway support and operation procedures. Afterall of these islands under complicated geological conditions of rotating coal pillarmining provides a theoretical reference and laid a theoretical foundation.