采动孔隙水压变化对底板破坏及突水机理研究  

Study on Mechanism of Floor Failure and Water-inrush Induced by Variation of Pore Water Pressures under Process of Mining

作　　者：高东川 胡书贞 高东忍 王振连 

机构地区：[1]陕西鲁泰能源科技有限公司,陕西榆林719400 [2]山东鲁泰控股集团有限公司,山东济宁272100 [3]山东新巨龙能源有限责任公司,山东菏泽274918

出　　处：《煤炭技术》2018年第1期165-167,共3页Coal Technology

基　　金：国家自然科学基金资助项目(51274135);山东省优秀中青年科学家科研奖励基金(BS2011SF016)

摘　　要：基于岩体渗流和岩体力学理论,从岩体微单元入手,给出了煤矿承压开采底板岩体微单元体应变与孔隙水压的关系;借助三维数值模拟,研究了工作面采动过程中,底板单元体积应变和孔隙水压二者的变化规律。研究结果表明,单元体应变微小变化会产生较大数量级岩体孔隙水压变化,造成岩体强度弱化,该结论为带压开采突水机理及防治提供理论依据。Based on the seepage theory of rock mass and the theory of rock mass mechanics,the relations between bulk strain of rock＇s element and pore water pressures from tiny element of rocks are derived. With simulation data,mainly analyzes the process of bulk strain of the floor rock＇s element, pore water pressures and the changing relation between the two under the process of mining, the law of which is obtained. The study results show that the increment of rock mass unit＇s micro- strain produced pore water pressures change in greater amount,causing volume change of the micro unit,which will finally lead to rock mass strength weakening. This conclusion can provide theoretical basis for coal mining above aquifer.

关 键 词：体应变 孔隙水压 底板破坏及突水 数值模拟 

分 类 号：TD745[矿业工程—矿井通风与安全]