非均布高压水对采煤工作面底板隔水岩层破坏特征及其突水条件研究

针对深部煤炭资源开采严重受底板高承压岩溶水害威胁的现实问题，为进一步认识工作面底板岩溶水突出机理，有效评价和防范矿井突水灾害，确保矿井安全开采，从岩溶地质与岩溶发育的根本规律方面研究分析了底板高压水含水介质结构特征及高压水对工作面底板隔水岩层的作用力方式，提出高压水对其上覆隔水岩层具有非均布水压作用力的基本概念，并将非均布水压作用方式概化为4种基本类型。通过数学与力学理论分析和数值模拟计算，分析研究了不同类型非均布水压力对其上覆隔水岩层的破坏特征及其诱发突水的条件，得出非均布水压力对隔水岩层的破坏程度明显小于均布水压的重要认识。在相同的水压力条件下，不同的非均布水压作用方式，对其上覆隔水层的破坏程度有明显差异，在煤层走向上水压作用范围越大则底板破坏范围和深度越大，在煤层倾向上水压作用范围的大小对于底板破坏范围及程度的影响相对较小。

Study on floor rock mass failure and water inrush caused by high pressure water in mining face

Abstract: Focus on serious water disasters from floor of deep mining face, studies the structure characteristics of aquifer and function character of high water pressure on the floor aquiclude rock of mining face. Gives the concept of un-uniform water pressure character to its roof aquiclude and modeled the mechanism of aquiclude failure under water pressure and mining with a modeling model. It is recognized that thickness of failure rock with un-uniform water pressure is smaller than that of uniform. The results are important for deep coal safety mining.