摘要
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。
Focus on serious water disasters from floor of deep mining face,in order to deep understand karst water inrush mechanism from mining face floor and effective evaluate and control water disasters,studied the structure characteristics of aquifer and function character of high water pressure on the floor aquiclude rock of mining face with karst geology and karst development regulation.Gave the concept of non-uniform water pressure distribution to its roof aquiclude and divided non-uniform water pressure distribution into four basic types.Studied and modeled the mechanism of aquiclude failure characters under non-uniform distribution water pressure with mathematics,geo-mechanics theory and numerical model.It is recognized that thickness of failure rock zone with non-uniform water pressure is smaller than that of uniform water pressure under equal water pressure.Different water pressure distribution have a different affect to its roof aquiclude stability,thickness of failure rock zone under water pressure along mining face distribution is greater than that of across mining face distribution water pressure and the thickness of failure rock zone increase with increasing of water pressure distribution region.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第7期1109-1114,共6页
Journal of China Coal Society
基金
国家重点基础研究计划(973)资助项目(2006CB202200)
国家自然科学基金资助项目(40772163)
关键词
非均布水压
隔水岩层
破坏特征
工作面底板突水
non-uniform distributed water pressure
aquiclude
rock failure
water inrush from floor of mining face
