炮采转综采工作面围岩控制技术研究

为了研究同一工作面不同回采工艺接续时的矿山压力显现规律及支护方案,通过UDEC数值模拟及工业性实验的方法对大倾角中厚煤层炮采工作面转综采切眼围岩应力、塑性区发育过程及控制技术进行研究。得出了以下结论:由于急倾斜煤层在采空区的非均匀充填作用,导致沿工作面倾向方向中部应力高,两端相对较低。通过锚网索联合支护及分次刷帮扩大工作面回采空间的施工方案,成功地解决了不同工作面转型的难题。

Study on Control Technology of Work Face which Changes Blasting Mining to Fully Mechanized Mining

Researches the strata behaviors and supporting scheme of mining face under different extraction ways, the stress distribution and plastic zone of inclined medium-thickness coal seam work face which changes blasting mining to fully mechanized mining is analyzed by using numerical modeling UDEC and industrial test. The conclusions are as following: because of the non-uniform filling effect of gangue in goaf of steep-inclined coal seam, the stress along extractive direction in the middle is relatively low and the stress is high in the end of work face. Based on the stress distribution characteristics, bolt-metal net-anchor supporting scheme and the construction scheme by using four times expansion of coal wall successfully solved the problem.