煤矿离层水害的成因与防治

Causes and Countermeasures for Water Inrush in Zone of Overburden Strata Separation

中岭煤矿在连续的暴雨之后发生了突水淹面灾害,使得防治水方针无法确定。分析否定了原来的侧方老空水成因,认为3~#煤层顶板以底部为黏土岩,上部厚层为细砂岩的结构在开采导水裂隙带高度小于煤层顶板黏土岩厚度的情况下,顶板上方形成了完整离层空间,强烈的大气降水补给进入离层空间。认为离层带内的积水因底板突然破坏是造成顶板突水淹没工作面根源。为再现离层水害的过程进行相似材料模拟实验,证实分析正确。后采用预疏干技术有效地解决了此类水害的再次发生。

In the Zhongling coal mine, water inrush happened after continuous rainstorm, and the cause made the countermeasures of preventing and treating water disasters uncertain. The analysis negated the original reason that the lateral goaf water caused the water disaster.It was considered that in the condition that it was clay rock in the bottom, sandstone in the top of the 3~#coal seam roof and the height of water flowing fractured zone was less than the thickness of the clay rock, there was integrated space of separated layers above the roof and intense atmospheric rainfall entered the space.The sudden destruction of the floor of the separation zone was the main cause of the water in overburden stratum separation bursting and inundating mining face. To know the process of the water disaster,the physical analogue of similar materials was made and verified the correctness of the analysis. Afterwards using drainage in advance technology effectively solve the recurrence of such water hazards.