摘要
随着煤矿开采深度的增加,受奥灰岩溶底板高承压水的威胁日趋严重,矿井突水事故的频率不断增加。建立了弹塑性多孔介质渗流应力耦合模型,并基于多物理场耦合模型软件COMSOL Multiphysics,结合徐州某矿突水实例,分析了含水层水压的变化对含断层底板突水危险性的影响。研究表明:随着含水层水压的增大,岩体介质的有效应力减小,岩体强度降低并容易产生塑性破坏;含水层水压越大,底板的塑性破坏区范围越大,含断层底板的突水危险性越大。研究结果可为承压水上采煤底板断层突水的防治提供参考。
With the increase of the depth of coal mining and the growing threat by the high confined water in the Ordovician Karst,mine water inrush accidents occurred frequency.For this purpose,an elastic-plastic porous-media seepage stress couple model was established,and based on the software COMSOL Multiphysics and in the light of the water inrush examples occurred in some mine in Xuzhou Coal Mining Area,analysis was made on the influence of the variation of the aquifer water pressure upon the water inrush hazard of floor fault.Study showed that the effective stress of the rock media decreased with the increase of the aquifer water pressure,the strength of rock mass also decreased and was easy to produce plastic damage.The greater the aquifer pressure,the larger the plastic failure zone of the floor and the greater the water inrush hazard of floor fault.This study result can provide reference for the prevention of water inrush of floor fault with high confined water.
出处
《矿业安全与环保》
北大核心
2011年第3期1-4,8,共5页
Mining Safety & Environmental Protection
基金
国家重点基础研究发展计划(973计划)项目(2007CB209400)
国家自然科学基金重点项目(50634050)
国家自然科学青年基金项目(50904065)
