辛安煤矿厚煤层综放开采覆岩活动规律及围岩控制研究

发布时间：2018-04-16 23:24

本文选题：厚煤层 + 放顶煤　；参考：《辽宁工程技术大学》2015年硕士论文

【摘要】：厚煤层煤炭资源在我国已经探明的煤炭储量中占有的比例达到了33%以上。大采高开采技术渐渐地成为厚煤层开采的主要开采工艺之一。本文以辛安煤矿1402大采高综采面为背景,通过数值模拟、理论分析、相似材料试验及现场工业试验相结合,研究了厚煤层综放开采工作面覆岩活动规律及控制。掌握了工作面矿压显现特征及支承压力分布情况,得出厚煤层采场顶板来压机理。首先从理论基础出发,分析了综放采场支撑压力及覆岩活动规律理论；结合现场实际,在实验室开展相似材料模拟实验,得到工作面回采时,顶、底板运动规律及变形破坏规律,为进矿压管理及支护等提出预测防治措施和基础数据资料。结合FLAC3D数值模拟和实验室相似模拟试验进行分析,对大采高煤层采场围岩应力分布规律和上覆岩层运移规律进行研究,得出采场顶板来压步距和强度、采场超前支护范围等重要参数,并与相似材料实验进行对比；结合现场采场控制中出现的问题,提出厚煤层综放采场支护方案,经现场检验,改善了回采工作而顶底板控制状态,提高了顶煤放出率,确保了矿井安全生产。
[Abstract]:The proportion of thick coal resources in the proven coal reserves in China has reached more than 33%.High mining technology has gradually become one of the main mining techniques in thick coal seam mining.Based on the fully mechanized mining face of 1402 mining height in Xin-an coal mine, through numerical simulation, theoretical analysis, similar material test and field industrial test, this paper studies the law and control of overburden rock movement in thick coal seam fully mechanized caving mining face.The characteristics of face pressure and the distribution of supporting pressure are grasped, and the mechanism of roof pressure in thick coal seam is obtained.Firstly, based on the theoretical basis, the supporting pressure and overlying rock activity law theory of fully mechanized caving face are analyzed, and the similar material simulation experiment is carried out in the laboratory in combination with the field practice, and the roof of the working face is obtained when the mining face is coming out.The law of motion and deformation and failure of bottom plate are used to predict and prevent the ground pressure management and support, and the basic data and data are put forward.Combined with FLAC3D numerical simulation and similar laboratory simulation test, the stress distribution law of surrounding rock and the overlying strata migration law of stope in large mining height coal seam are studied, and the pressure step distance and strength of roof in stope are obtained.Comparing with the similar material experiment, combining the problems in the field control, the paper puts forward the support scheme of the fully mechanized caving stope in thick coal seam, which has been tested on the spot.The control state of roof and bottom plate is improved, the rate of top coal drawing is increased, and the safety of mine production is ensured.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD325

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