底板承压水水害致灾机理研究

Study on mechanism of water disaster caused by floor pressure

底板承压水致灾的过程主要体现为底板岩层的突水,以庞庞塔煤矿9-101工作面为例,对底板的破坏特征进行理论研究和数值模拟分析,得到了底板应力分布的演化特征,研究了底板遇断层构造时的承压水水害致灾机理。研究表明,当该工作面推进距离为140 m时,底板破坏深度为12.5 m,此时,承压水就会沿着导水通道进入采场采空区形成水害。

The process of water pressure caused by the confined water in the floor is mainly reflected in the water inrush of the floor rock. 9-101 working face of Pangpangta Mine was taken as example to study damage characteristics of floor, the evolution of floor stress distribution was got, disaster mechanism of confined water damage when bottom with fault structure was studied, it was considered that when the working surface advancing distance was 140 m, the floor damage depth was12.5 m. The confined water would enter the goaf to form water hazards.