特拉布拉露天煤矿采空区探测研究

发布时间：2018-07-15 14:56

【摘要】：随着煤炭价格的变动，使国内外的部分矿山实施了井工转露天开采。而原有井工矿所遗留的大量形态各异、成因复杂的采空区困扰着诸多矿山，如何圈定出其影响区域及采空区深度已成为重要课题。本文针对采空区范围、深度探测问题以鄂尔多斯市乌兰煤炭集团公司特拉布拉煤矿为研究对象运用瞬变电磁探测技术，通过对范围明确的采空区的上赋岩层施加不同重量矿用卡车等大型矿用机械设备，，确定研究区域内上赋岩层所能承受的重量极限值。研究内容具体分为以下方面：（1）通过对矿区的现场调研，确定实验区域范围，运用GPS-RTK放样拐点坐标。（2）在确定的实验区域运用ATEM-10KW瞬变电磁发射机和ATEM-IV型瞬变电磁接收机，使用重叠回线法进行采空区探测工作。（3）分别运用Grapher4.0、ATEM-2pro、Voxler3、Surfer8等软件针对探测结果进行分析，最得出视电阻率等值线图以及地下采空区三维位置示意图。（4）针对三维位置示意图，运用FLAC-3D软件建立采空区模型，并选定6个岩土介质破坏严重且地下应力环境复杂的地表薄弱位置施加相当于不同吨位的矿用开车重量的面向载荷，计算出各位置的极限承重，最终得出地表最薄弱位置所能承受的最大矿用机械设备的重量为248t。本文针对运用瞬变电磁法圈定出的空间位置、形态、厚度已明确的采空区，对其上赋岩层施加不同重量矿用卡车等大型矿用机械设备，分析其极限承重能力，对特拉布拉煤矿甚至其他地质条件相似的拥有采空区安全隐患的矿山具有重要的现实和长远意义。
[Abstract]:With the change of coal price, some mines at home and abroad have been converted to open-pit mining. However, a large number of different shapes have been left over from the original wells and mines, and many mines have been troubled by the complex goaf of origin. How to delineate the affected area and the depth of the goaf has become an important subject. Aiming at the scope of goaf and depth detection problem, this paper applies transient electromagnetic detection technology to the Trabra Coal Mine of Wu Lan Coal Group Company of Ordos City. By applying large mining machinery and equipment such as truck with different weights to the upper strata of the goaf, the limit value of the weight of the upper strata in the study area can be determined. The research contents are divided into the following aspects: (1) through the field investigation of the mining area, determine the scope of the experimental area, GPS-RTK inflection point coordinates are used. (2) ATEM-10KW transient electromagnetic transmitter and ATEM-IV transient electromagnetic receiver are used in the determined experimental area. The overlapped loop method is used to detect the goaf. (3) the detection results are analyzed by using the software of Grapher 4.0 / ATEM-2proVoxler3 / Surfer8 respectively. The contour map of apparent resistivity and 3D position map of underground goaf are obtained. (4) the model of goaf is established by using FLAC-3D software. At the same time, six weak positions of ground surface with serious damage of rock and soil medium and complicated underground stress environment are selected to apply the face load equivalent to mine starting weight of different tonnage, and the ultimate bearing capacity of each position is calculated. Finally, it is concluded that the maximum weight of mining machinery and equipment can be supported by the weakest position of the earth's surface is 248 t. In this paper, aiming at the goaf defined by transient electromagnetic method in which the space position, shape and thickness have been determined, large mining machinery equipment such as mine truck with different weights is applied to its upper strata, and its ultimate load-bearing capacity is analyzed. It has important practical and long-term significance for Trabra coal mine and other mines with similar geological conditions.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD325.4

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