受采动影响底板隐伏断层滞后突水分析

Research on the Lagging Water Inrush Caused by the Hidden Fault Affected by Coal Mining on the Floor

为研究底板隐伏断层滞后突水,基于矿山压力与岩层控制理论,针对底板隐伏断层与回采工作面的不同空间位置关系,分析了采动引起的矿山压力对断层水压力的影响,得出断层水压增高的规律及断层水压力计算公式,分析了导致断层水压力变化的影响因素。分析结果表明:断层水压力随着断层倾角的增加而减小,受采动影响断层水压力随着最小主应力和支承压力的增加而呈线性增大的趋势。基于断层与回采工作面的不同空间位置关系,分析了受采动影响导致底板隐伏断层突水的力学原因,可为底板隐伏断层突水灾害防治提供理论依据。

In order to research the lagging water inrush caused by the hidden fault affected by coal mining on the floor,based on the theory of mine pressure and rock formation control,in view of the different spatial position relations between the hidden fault on the floor and the stope working face,the influence of mine ground pressure caused by mining on the water pressure was analyzed,the law of the increase of hydraulic pressure in the fault and the calculation formula of fault water pressure were obtained,the influencing factors of fault water pressure change were analyzed.The results show that the water pressure in the fault decreases with the increase of fault dip,the water pressure in the fault affected by mining increases linearly with the increase of the minimum principal stress and support pressure.Based on the different spatial position relations between the hidden fault and the stope working face,analyzed the mechanical reason of water inrush caused by the hidden fault on the floor affected by coal mining,the researching results can provide the theoretical basis for the prevention and treatment technology of water inrush caused by the hidden fault on the floor.