【作者】 张宇；

【导师】 周西华；

【作者基本信息】 辽宁工程技术大学 ， 安全技术及工程， 2014， 硕士

【摘要】 本文针对山西马军峪煤矿顶板周期来压期间邻近层瓦斯抽采的问题,采用数值模拟与现场实测数据相结合的方法进行分析。研究了顶板周期来压期间邻近层瓦斯涌出的规律,通过对矿井瓦斯基础参数进行测定,全面了解瓦斯赋存情况。通过对邻近层瓦斯卸压机理及规律的理论分析,利用FLUENT模拟软件模拟顶板来压期间工作面瓦斯浓度的变化,分析顶板来压对邻近层瓦斯涌出的影响。从提高回采工作面邻近层瓦斯抽采效果,尽量减少在回采过程中瓦斯涌出量的方面出发,结合山西马军峪煤矿工程实践,提出了采用倾向平行高位钻孔进行邻近层瓦斯抽采,并对抽采工艺参数进行优化设计,同时对抽采效果进行分析,研究了顶板周期来压期间邻近层钻孔抽采瓦斯量变化规律,分析出顶板来压期间钻孔抽采瓦斯量及有效的抽采瓦斯时间明显增加,且抽采瓦斯量与抽采时间呈周期性波动,与顶板周期来压步距有较好相关性,提出了布置钻孔参数时应考虑来压步距的影响。更多还原

【Abstract】 Method of numerical simulation combining with actual measured data is used in this thesis, which solves problem of adjacent layer gas extraction during roof periodic pressure of Ma Junyu. The law of Adjacent layer gas extraction during roof periodic pressure is researched, by determining mine gas parameters to understand gas occurrence conditions comprehensively. Through the oretical analysis of adjacent layer gas pressure relief mechanism and rule and Fluent simulation software is used to simulate gas concentration during roof pressure of working face, the influence of roof pressure on adjacent layers gas emission is analyzed. Through combination with engineering practice of Ma Junyu mine, parallel high drilling tendency to adjacent layer gas extraction is used, and extraction process parameters is optimized, from aspects of improving effect of adjacent layer gas extraction for working face and decreasing gas emission in process of mining as far as possible. At the same time, extraction effect is analyzed. Rule of gas emission for drilling extraction adjacent layer during roof periodic pressure is researched. Gas emission and extraction time is increased significantly. That’s cyclical fluctuation between gas extraction quantity and extraction time, and interval of roof periodic pressure has good correlation with gas extraction quantity. So it should be considered the influence of pressure interval when borehole parameters are arranged.更多还原