大采高工作面回撤通道稳定性研究

Study on the stability of channel to withdraw the working face with large mining height

该文以纳一矿6 m大采高6204工作面末采为工程背景,结合6204综采面末采中回撤通道出现的破坏问题,对回撤通道受采动影响进行数值模拟分析,确定工作面超前支承压力的影响范围以及随工作面推进主回撤通道应力分布变化情况。

In this paper, taking the last cutting stope of 6204 working face with 6 m large mining height of nayi as engineering background, combined with the destruction of mining in the 6204 retracement channel at the end of fully mechanized mining face, the retracement channel influenced by mining numerical simulation analysis, determine the scope of influence of abutment pressure in working face, and the change of the stress distribution retracement roadway with the advance of working face, The research results will be applied to the engineering practice.