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我矿在东翼采区714工作面进行先炮采采出三角煤柱，然后进行综采的尝试，取得了明显的经济效益。1714工作面的基本情况该面位于-400m水平东翼采区的西翼，工作面设计走向长500m，倾斜长140m，在工作面切眼以西有一与工作面呈斜交方向的正断层，落差3．2m～3．5m。造成综采切眼
I mine in the east wing mining area 714 face shot first mining triangular pillars, and then attempt to fully mechanized mining, and achieved significant economic benefits. 1714 Basic Conditions of Working Face This face is located in the west wing of -400m horizontal east wing mining area. The working face is designed to be 500m long and inclined to 140m. There is a normal fault to the west of the working face which is oblique to the working face, 3.2m ~ 3.5m. Cause comprehensive mining cutting