黄土沟壑区浅埋近距煤层群开采地表移动变形规律研究

发布时间：2018-03-12 20:09

本文选题：黄土沟壑区　切入点：浅埋近距离煤层　出处：《西安科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：在黄土沟壑区下进行煤层开采,地表移动变形规律将随黄土沟壑区坡体稳定性的变化而改变,地表甚至产生一系列的地质灾害,若进行近距离煤层群开采,地表移动变形规律则显得更为复杂。因此,开展黄土沟壑区下浅埋近距离煤层群开采的地表移动变形规律,对实现黄土沟壑区浅埋煤层矿井安全生产、地面灾害防治和生态环境保护均具有重要意义。论文以陕北榆神府矿区为背景,以柠条塔煤矿为研究对象,结合柠条塔煤矿N1114和N1206工作面地表移动变形观测数据,分析了该区域的地表移动变形规律,同时借助FLAC3D数值模拟软件,分析了浅埋条件下的近距离煤层群重复采动及沟壑坡体对地表移动变形的影响,主要结论如下:⑴给出了柠条塔煤矿近距离煤层群开采的各个角量值,并结合该煤矿地表移动变形规律,分析了影响黄土沟壑区地表移动变形的主要因素;⑵应用FLAC3D数值模拟,分析了单一煤层、近距离煤层群重复采动及顺坡和逆坡开采时地表移动变形规律,通过对比分析,给出了浅埋条件下近距离煤层群重复采动及黄土沟壑区坡体稳定性对地表移动变形规律的影响;⑶应用概率积分预计理论,结合计算机反演模拟,对下沉系数等概率积分预计参数进行了修正,并给出了一种黄土沟壑区下近距离煤层群开采地表下沉系数的确定方法;结合黄土沟壑区坡体的稳定性分析,给出了黄土沟壑区下浅埋近距离煤层群开采的地表移动变形规律,为该采矿地质条件下的煤炭绿色开采、地面灾害防治和可持续发展提供科学依据。
[Abstract]:When coal seam is mined in loess gully area, the law of surface movement and deformation will change with the change of slope stability in loess gully region, and even a series of geological disasters will occur on the surface. The law of ground surface movement and deformation is more complicated, therefore, the law of surface movement and deformation of shallow buried coal seam group mining in loess gully area can realize the safety production of shallow buried coal seam mine in loess gully area. Ground disaster prevention and ecological environment protection are of great significance. This paper takes Yushenfu mining area in northern Shaanxi as background, takes Caragana coal mine as research object, and combines the observation data of surface movement and deformation of Caragana coal mine N1114 and N1206 working face. The law of surface movement and deformation in this area is analyzed. At the same time, with the help of FLAC3D numerical simulation software, the effects of repeated mining of short distance coal seam groups and gully slope body on surface movement and deformation under shallow burial condition are analyzed. The main conclusions are as follows: (1) the angle values of close distance coal seam group mining in Caragana tower coal mine are given. Combined with the law of surface movement and deformation in this coal mine, the main factors influencing the surface movement and deformation in loess gully area are analyzed. 2. The numerical simulation of FLAC3D is applied to analyze the main factors affecting the surface movement and deformation in loess gully area. This paper analyzes the law of surface movement and deformation in single coal seam, short distance coal seam group and mining along slope and inverse slope, and through comparative analysis, The effects of repeated mining of short distance coal seams and stability of slope body in loess gully region on surface movement and deformation under shallow burying condition are given. The probability integral prediction theory is applied to the simulation by computer inversion. The prediction parameters of probability integral such as subsidence coefficient are modified, and a method to determine the subsidence coefficient of coal seam group mining in loess gully region is given, and the stability analysis of slope body in loess gully region is also given. The law of surface movement and deformation of shallow buried near distance coal seams mining in loess gully region is given, which provides scientific basis for green coal mining, ground disaster prevention and sustainable development under this mining geological condition.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD325

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