充填开采地表沉陷及顶板控制基础研究

发布时间：2018-04-25 12:43

本文选题：充填开采 + 顶板控制　；参考：《太原理工大学》2015年硕士论文

【摘要】：我国是一个以煤炭为主要消费能源的能源大国，随着采煤技术的发展与革新以及人类对煤炭资源需求的加大，我国的煤炭年产量急剧增长。加之煤炭的利用率低、许多煤炭属于“三下”压煤，使得许多地方的煤炭资源在短短几十年甚至几年很快枯竭。为了解决煤炭“三下”压煤问题，充填开采逐渐开始被人们采用。充填开采是一种新型的绿色开采方法，对于减小地表沉降和增加煤炭的利用率效果比较显著。本文以潞安集团李村矿的地质资料为背景，对影响本矿开采沉陷的机理进行了探究；以岩层控制的关键层理论为基础，运用弹性力学的相关知识，将煤层开采后充填工作面顶板简化为弹性薄板的模型，通过理论计算得出顶板的极限跨距为20.33m；计算得出了顶板的应力、应变与顶板变形的挠度的关系，从而可以通过顶板位移的监测来判断顶板的应力变化情况；通过相似模拟技术和数值模拟技术对理论计算的结论进行验证和补充，，从而在一定程度上可以为本矿充填开采中工程问题有一定的指导作用。
[Abstract]:With the development and innovation of coal mining technology and the increase of human demand for coal resources, the annual output of coal in China has increased rapidly. In addition, the low utilization rate of coal, many coal belong to the "three down" coal, so that coal resources in many places in just a few decades or even a few years quickly depleted. In order to solve the problem of coal mining, filling mining is gradually adopted by people. Filling mining is a new type of green mining method, which can reduce the surface subsidence and increase the utilization rate of coal. Based on the geological data of Licun Mine of Lu'an Group, this paper probes into the mechanism of affecting the mining subsidence of the mine, and applies the relevant knowledge of elasticity to the theory of key strata controlled by rock strata. In this paper, the roof of filling face after coal seam mining is simplified as a model of elastic thin plate, the limit span of roof is 20.33 m by theoretical calculation, and the relationship between stress and strain of roof and deflection of roof deformation is calculated. Therefore, the stress change of roof can be judged by monitoring the displacement of roof, and the conclusion of theoretical calculation can be verified and supplemented by the technique of similar simulation and numerical simulation. To some extent, it can be used as a guide for engineering problems in filling mining of this mine.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD327

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