摘要
为获取"三下"压煤环境下矸石充填开采对地表沉陷的影响,以某煤矿6号煤层1623矸石充填工作面为研究对象,布设沉降观测站进行长期、持续观测,结合概率积分法对地表沉陷程度定量化处理。根据1623矸石充填工作面52个月的观测数据分析得出,矸石充填下沉量最大96 mm,占采高的2.07%;超前影响距离和影响角会随着开采区面积的扩大而缓慢增加,稳定在一定的水平;与垮落开采方式相比,矸石充填开采的下沉系数平均降低96%,主要影响角正切值缩小52%,最大水平变形0.226 mm/m,最大倾斜变形0.168 mm/m,大大减小了煤炭资源开采对地表沉陷的影响,对地表建(构)筑物构不成威胁。
In order to obtain the influence of waste filling mining on surface subsidence under"three-under"coal compression environment,1623 waste filling face of No.6 coal seam of a coal mine was taken as the research object,a settlement observation station was set up for long-term and continuous observation,and the degree of surface subsidence was quantitatively treated by probability integral method.According to the observation data analysis of T923 gangue filling face for 40 months,the maximum subsidence of gangue filling was 83 mm,accounting for 2.07% of mining height;the advance influence distance and angle would increase slowly with the expansion of mining area and stabilize at a certain level;compared with caving mining method,the subsidence coefficient of gangue filling mining was reduced by 96% on average,and the positive tangent value of main influence angle was reduced by 52%.The maximum horizontal deformation was 0.183 m m/m and the maximum inclined deformation was 0.125 m m/m,which greatly reduced the impact of coal mining on surface subsidence and did not threaten surface structures.
作者
贺杰兵
He Jiebing(Xinzhouyao Mine,Safety Supervision Station of Datong Mining Group,Xinzhou 037021,China)
出处
《煤炭与化工》
CAS
2019年第2期38-41,45,共5页
Coal and Chemical Industry
关键词
矸石充填开采
地表沉陷
控制效果
gangue backfilling mining
surface subsidence
control effect
