孤岛工作面覆岩结构破坏与矿压显现规律研究

发布时间：2018-04-18 18:34

本文选题：孤岛工作面 + 覆岩结构　；参考：《河北工程大学》2017年硕士论文

【摘要】：近年来孤岛工作面开采相关问题日益受到学者们的广泛关注,由于煤炭资源的消耗随着我国经济建设的稳步发展不断增大,但是我国20世纪30年代建成的煤矿面临着资源枯竭等问题,通过孤岛工作面的回采可以解决资源枯竭的问题,现场实际开采中孤岛工作面在回采过程中经常会出现一些安全事故,例如,冲击地压的发生,孤岛工作面覆岩的移动、断裂、跨落等,严重的影响了矿井的安全生产,降低了矿井的经济效益,因此更加需要我们对孤岛工作面相关问题加深的研究。论文以冀中能源峰峰集团薛村矿14093孤岛工作面为研究的背景,采取理论与实验相结合的研究方法,通过广泛的查阅了孤岛工作面覆岩的相关文献资料,了解孤岛工作面岩层的结构特征,并通过实验室相似模拟实验模拟冀中能源峰峰集团薛村矿14093孤岛工作面记录孤岛工作面两侧巷道、孤岛工作面的顶板,底板,老顶的应力变化,研究了开采过程中孤岛工作面覆岩裂隙发育规律。通过FLAC~(3D)数值模拟软件建立数值模拟模型,分析开采过程中孤岛工作面覆岩运动和应力分布规律,揭示了孤岛工作面开采过程中两侧巷道围岩发生动力灾害的机理,获得了孤岛工作面采空区尺度对孤岛工作面灾变的控制作用。研究成果可为孤岛工作面安全开采提供借鉴。
[Abstract]:In recent years, the problems related to the mining of Gudao face have been paid more and more attention by scholars, because the consumption of coal resources is increasing with the steady development of economic construction in our country.However, the coal mines built in the 1930s in our country are faced with the problems of resource depletion, and the problem of resource depletion can be solved through the mining of isolated island face.In actual mining, some safety accidents often occur in the process of mining. For example, the occurrence of impact ground pressure, the movement of overburden, the fracture and the fall of overburden of the isolated island face seriously affect the safe production of the mine.It reduces the economic benefit of the mine, so we need to deepen the research on the related problems of the island face.Based on the background of 14093 Gudao face in Xuecun Coal Mine of Fengfeng Group of Jizhong Energy, this paper adopts the research method of combining theory with experiment, and through extensive consulting the relevant literature of overburden rock of Gudao face.The structural characteristics of the rock strata of the Gudao face are understood, and the simulation results of the laboratory simulation experiments are used to record the roadways on both sides of the isolated island face, the roof and floor of the isolated island working face, and the 14093 island face of Xuecun Coal Mine of Xuecun Coal Mine of Fengfeng Group in Jizhong County.In this paper, the stress change of the main roof is studied, and the law of overburden crack development in the isolated island face is studied.The numerical simulation model is established by using the software FLACU (3D) to analyze the movement and stress distribution of the overburden rock in the isolated island working face, and the mechanism of the dynamic disaster in the surrounding rock of the roadway on both sides of the coal mining process is revealed.The control effect of goaf size on the disaster of isolated island face is obtained.The research results can be used for reference for safe mining of isolated island face.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD323

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