固体充填开采矿压显现特征监测及数值模拟

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英文篇名：Numerical Simulation and Monitoring of Pressure Characteristics of Solid Filling Mining 作者：郑训臻 ; 王岩 ; 赵海波 ; 成之祥 英文作者：ZHENG Xunzhen;WANG Yan;ZHAO Haibo;CHENG Zhixiang;School of Civil Engineering,Changchun University of Architecture & Civil Engineering;China Coal Technology and Engineering Group Shenyang Research Institute;The Fourth Team of Machine Excavation of Wangcun Coal Company,Datong Coal Mine Group; 关键词：固体充填开采 ; 现场监测 ; 矿压显现 ; 覆岩破坏 ; 数值模拟 英文关键词：solid-filled mining;;on-site monitoring;;mine pressure manifestation;;overburden destruction;;numerical simulation 中文刊名：MKAQ 英文刊名：Safety in Coal Mines 机构：长春建筑学院土木工程学院;煤科集团沈阳研究院有限公司;同煤集团王村煤业公司机掘四队; 出版日期：2019-07-20 出版单位：煤矿安全 年：2019 期：v.50;No.541 语种：中文; 页：MKAQ201907060 页数：5 CN：07 ISSN：21-1232/TD 分类号：260-264

摘要

为了研究充填开采覆岩破坏及应力场分布特征,以鑫源煤矿6~#煤层T6001充填工作面为工程背景,采用现场监测、数值模拟方法,通过布置液压支架压力感应器对工作面顶板压力进行监测,运用FLAC~(3D)软件模拟充填开采与垮落开采过程,分析覆岩破坏及应力场分布情况。结果表明:支架阻力曲线呈现两头高中间低的趋势,反映了充填体经过接顶、压实对顶板的支撑作用由小变大的过程;采空区范围较小时充填开采顶板破坏与应力分布情况与垮落开采相近,随着采空区范围增大,充填体对覆岩活动的控制作用逐渐增强,最终充填开采应力峰值约49MPa,覆岩破坏高度为3.5 m,较垮落开采分别降低了10%、71.5%,充填开采有效降低了矿压显现程度。
        To study the characteristics of overburden failure and stress field distribution in filling mining, the T6001 filling working face of Xinyuan Coal Mine is used as the engineering background. The pressure monitoring of the working face is monitored by the hydraulic monitoring of the hydraulic pressure sensor. The FLAC~(3D) software was used to simulate the filling and slump mining process to analyze the overburden failure and stress field distribution. The results show that the resistance curve of the bracket shows a trend of high at both ends and low in the middle, which reflects the process of supporting the roof from small to large after the filling and compaction of the filling body; the roof failure and stress distribution of the filling mining of the goaf is similar to that in caving mining, with the increase of the area of the goaf, the control effect of the filling body on the overburden activity is gradually enhanced. The peak value of the final filling mining is about 49 MPa, and the height of the overburden is 3.5 m,which is 10% and 71.5% lower than caving mining respectively, and filling mining effectively reduces the extent of mine pressure.

引文

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