益德煤业150103工作面动压巷道围岩稳定性分析及控制研究

发布时间：2018-07-07 23:15

本文选题：矿压规律 + 动压巷道　；参考：《河北工程大学》2015年硕士论文

【摘要】：巷道矿压规律及围岩控制技术一直都是矿井建设的首要工程,在现阶段煤炭行业处于寒冬阶段的大环境下,如何提高矿井生产的经济效益成了在竞争中生存的重要问题,那么巷道支护成本的控制和留设煤柱宽度的合理性就显得尤为的重要起来。本文为国家自然科学基金“深井巷道‘双壳’注浆加固支护机理研究(51174070)”、河北省自然科学基金“冀南地区深部巷道双壳注浆加固支护机理研究(E2011402046)、河北地区深井工程软岩巷道连续‘双壳’治埋底鼓机理研究(E2015402038)”中的一部分。益德煤业为新建整合矿井,本文以其150103备采工作面回风巷掘进为研究背景,通过理论分析、数值模拟等研究手段,对掘进巷道紧邻回采工作面时,巷道围岩应力分布、位移变化的规律及巷道支护方式、煤柱留设宽度进行了研究。首先,对150103工作面回风巷道掘进期间的三个阶段(实体煤掘进阶段、沿空掘巷阶段、受采动影响阶段)进行了围岩受力、围岩结构特征分析,并对150101工作面超前支承压力的分布进行研究,分析认为巷道在受动压影响时围岩结构破坏首先发现在弱结构面,并沿弱结构面向煤体深部发展;其次,对150103动压巷道围岩变形破坏机理进行了分析,包括动压巷道的围岩破坏特征的阐述、静压状态与动压状态下巷道围岩结构失稳的机理分析、动压巷道支护技术研究三部分组成,分析认为采用动压巷道围岩破坏主要是由于非对称变形造成巷道失稳。最后,通过FLAC3D数值模拟技术对150103工作面回风巷道掘进期间的三个阶段进行围岩应力、位移规律演化,并对原巷道布置方案、优化后煤柱及巷道支护方案进行模拟分析研究,模拟结果显示优化后支护方案能够使得巷道在动压影响下继续使用,且从模型塑性区云图发现,煤柱留设位置刚好位于应力降低区。
[Abstract]:The rule of roadway pressure and the control technology of surrounding rock are always the primary projects of mine construction. How to improve the economic benefit of mine production has become an important problem to survive in the competition under the environment of the coal industry in the cold winter stage at the present stage, and how to improve the economic benefit of mine production has become an important problem in the competition. So the control of roadway support cost and the rationality of retaining coal pillar width are particularly important. This paper is a study on the supporting mechanism of deep roadway 'double shell' grouting reinforcement (51174070) for the National Natural Science Foundation of China. Part of Hebei Province natural science foundation "deep tunnel double shell grouting reinforcement mechanism research (E2011402046), Hebei area deep well engineering soft rock roadway continuous' double shell 'control buried floor heave mechanism (E2015402038)" part. Yide coal industry is a new integrated mine. In this paper, the stress distribution of roadway surrounding rock is studied by means of theoretical analysis, numerical simulation and so on. The law of displacement change, the supporting mode of roadway and the width of coal pillar are studied. Firstly, three stages (solid coal driving stage, goaf driving stage, mining effect stage) during the excavation of 150103 face return air roadway are analyzed, and the surrounding rock structure characteristics are analyzed. The distribution of leading support pressure in 150101 working face is studied. It is considered that the failure of surrounding rock structure under the influence of dynamic pressure is first found on the weak structural plane and developed along the weak structure towards the deep part of the coal body. The deformation and failure mechanism of the surrounding rock in 150103 dynamic pressure roadway is analyzed, including the description of the failure characteristics of the surrounding rock in the dynamic pressure roadway, the mechanism analysis of the surrounding rock structure instability under the static pressure state and the dynamic pressure state, and the research on the supporting technology of the dynamic pressure roadway. It is considered that the failure of surrounding rock under dynamic pressure is mainly due to the instability of roadway caused by asymmetric deformation. Finally, through the FLAC3D numerical simulation technology, the surrounding rock stress and displacement law of the three stages during the driving period of the 150103 face return air roadway are analyzed and analyzed, and the original roadway layout scheme, the optimized coal pillar and the roadway support scheme are simulated and analyzed. The simulation results show that the optimized support scheme can make the roadway continue to be used under the influence of dynamic pressure, and from the cloud diagram of the plastic zone of the model, it is found that the position of the coal pillar is just in the stress reduction area.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353

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