地层沉降协调法防治煤矿立井破坏试验研究  

EXPERIMENTAL INVESTIGATION ON METHOD OF STRATUM SETTLEMENT COORDINATION TO PREVENT AND CONTROL COALMINE SHAFT FAILURE

作　　者：周鑫 于庆[1] ZHOU Xin;YU Qing(School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学,资源与地球科学学院,徐州221116

出　　处：《工程地质学报》2021年第4期1105-1112,共8页Journal of Engineering Geology

基　　金：教育部留学回国人员科研启动基金;江苏高校优势学科建设工程资助项目。

摘　　要：近年来已有许多专家学者对立井附加应力的产生以及相应的消除方法进行了理论和试验研究,在此基础上,本文首次提出地层沉降协调法,分析了其作用机理,进行了立井井壁变形破坏防治的试验研究,对地层沉降协调法消除附加应力的有效性进行了分析。试验中通过设置不同的隔离协调条件,得出了地层排水固结沉降过程中井壁应变变化以及土体表面沉降变形规律。结果表明,开始阶段的井壁纵向应变都有突然增大的现象,其中未加隔离体试验的突增较大。隔离协调体对井壁纵向应变的突变有减小作用。此外,隔离体能够有效减缓其内侧沉降速率以及最终沉降量。地层沉降协调法可以明显降低沉降过程中井壁纵向应变突增值与稳定值以及竖向力与最大主应力,同时可以保持井壁横向变形及受力的稳定,因此,可以发展为防治矿山立井井壁破坏的有效方法。In recent years,many experts and scholars have carried out theoretical and experimental research on the mechanism of additional stress in shaft lining and the corresponding eliminating methods.On the basis of these researches,this paper proposes the strata settlement coordination method,analyzes the mechanism of the proposed method,carries out an experimental study on the change of additional stress in shaft lining in the soil layer,as well as analyzes the effectiveness of the proposed method while it is used in eliminating the additional stress.By setting different isolation coordination conditions,the proposed method acquires the stress variation of shaft lining and the settlement deformation of soil surface in the strata settlement process.In the experiment,there are sudden increases in the vertical strain of the shaft lining.The first group without isolation coordination body,the sudden increase values are obviously higher than the latter three groups.In addition,the settlement of the ground surface in the process of strata subsidence can be decreased using the method of stratum settlement deformation.The proposed method can decrease the sudden increase values and the steady values of shaft lining vertical strain effectively.In the meantime,the horizontal strain of cylinder can keep steady.Therefore,the proposed method can be developed to be a potentially effective approach for prevent and control lining failure of coal mine shaft.

关 键 词：地层沉降 协调 附加应力 试验研究 

分 类 号：TU91[建筑科学—建筑理论]