采动岩体应变-渗流耦合效应与致灾机理分析  

Analysis of Strain-Seepage Coupling Effect of Rock Mass Affected by Mining and Disaster-Causing Mechanism

作　　者：牛多龙[1] 杨科[2] 华心祝[2] 周广飞[2] 

机构地区：[1]淮南矿业(集团)有限责任公司潘一煤矿,安徽淮南232082 [2]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2013年第3期45-51,共7页Journal of Anhui University of Science and Technology:Natural Science

摘　　要：为了研究承压开采背景下顶板岩层破断和渗流规律的时空关系特征,在理论分析的基础上建立了基于有限元数值分析的等效连续介质流固耦合数学模型,嵌入了应变—渗透系数的耦合本构关系,应用于工程实践。得出采场围岩渗透性演化规律、含水层中孔隙压力演化规律及采动破坏区发育范围与渗透性增大区对比关系。研究结果表明:将岩体渗透性演化规律与岩体采动破坏区发展规律共同作为计算和设计防水煤柱的判据,更加符合现场实际;研究成果对厚松散层高承压含水层下安全高效开采具有指导意义。In order to study characteristics of space -time relations of regularity of roof rock breaking and seepage under the background of mining on confined aquifer ,the equivalent continuum media fluid -solid coupling math-ematical model based on the finite element numerical analysis was established on the basis of theoretical study ,in which coupling constitutive relationship between strain and permeability coefficients is embedded ,applied to prac-tical engineering .The evolution rule of permeability and aquifer pore pressure , relationship between strata failure and increased permeability zone were obtained .The results showed that the evolution law of permeability and de-velopment law of strata failure applied as the criteria to calculate and design waterproof coal pillar ,is more in line with the actual site .The research results provide a reference to safe and efficient mining on thick unconsolidated confined aquifer .

关 键 词：采场围岩 渗流场 应变场 防水煤柱 流固耦合 

分 类 号：TD325[矿业工程—矿井建设]