承压水上采煤底板破坏规律的解析法计算及应用  

Analysis Calculation on Floor Failure Law of Coal Mining Above Pressurized Water Strata and Application

作　　者：冯磊[1] 赵光明[1,2] 孟祥瑞[1] 

机构地区：[1]安徽理工大学能源与安全学院,安徽淮南232001 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221008

出　　处：《煤炭科学技术》2011年第9期13-16,共4页Coal Science and Technology

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-08-0819);国家自然科学基金资助项目(50804003);霍英东青年教师基金基础性研究课题(121050);中国矿业大学煤炭资源与安全开采国家重点实验室开放研究基金资助项目(10KF03)

摘　　要：根据工作面回采过程中其前后方支承压力并考虑底板含水层的水压,建立支承压力与水压共同作用于底板的力学模型,以此求解底板任意一点的应力,与莫尔-库仑准则相结合给出了底板是否破坏的判别依据;根据孙疃煤矿1028工作面地质情况,理论计算得出底板下0～20 m内受采动影响较大;其破坏由工作面前方2 m向采空区方向发展,破坏深度范围0～16 m,最大破坏深度为16 m。现场采用电阻率测试方法对相对于工作面不同位置处的底板破坏情况进行了探测,其结果与理论计算相近,验证了此力学模型理论分析的正确性。Based on the front and rear support pressures during the mining process of the coal mining face and in consideration of the water pressure of the aquifer under the floor,a mechanics model with the support pressure and water pressure jointly effected to the floor was established in order to calculate the stress at the any point of the floor.With the combination with the Mohr-Coulomb Criterion,the judgment basis of the floor failure or not could be provided.According to the geological conditions of No.1028 coal mining face in Suntuan Mine,the theoretical calculation showed that the strata within 0~20 m depth under the seam floor were highly affected by the mining activities,the failure at 2 meter in the front of the gateway driving face would be developed toward the direction of the goaf,the failure depth scope would be within 0~16 m and the max failure depth would be 16 m.The electric resistance rate test and measurement method was applied at the site to detect the floor failure condition at the different locations of the gateway driving face.The results and the theoretical calculation were closed to each other and could verify the correction of the theoretical analysis for the mechanics model.

关 键 词：半无限体 应力分布 底板 破坏分布 电阻率 水压 

分 类 号：TD322[矿业工程—矿井建设]