水采矿压控制机理的有限元研究

FINITE ELEMENT METHOD RESEARCH OF CONTROLLING MECHANISM OF ROCK PRESSURE WITH HYDRAULIC MINING

本文利用有限元计算机模拟研究了水采采场周围的应力分布规律,着重探讨了顶板在煤体上方断裂前后的支承压力分布和不同的枪眼位置时的支承压力分布规律。研究结果表明,在塑性区掘进回采巷道引起的应力转移比在高应力的弹性区掘进回采巷道引起的应力转移要小得多,减轻水采矿压显现的关键是在低应力区掘进回采巷道和实行区段间交替回采。

The law of stress distribution around hydraulic mining stope is studied with computer modelling of the finite element method in this paper. The law of abutment pressure distribution before and after the roof breaking above the coal mass and the different position of roadways is especially discussed. The research results show that the stress change caused by excavating roadways in the plastic zone is much less than that in the elastic zone with high stress. The key for reducing mining pressure manifestation in hydraulic mining area is that the roadways should drive in low stress zone and coal should be mined in differen sublevels alternately.