五虎山矿高位钻孔抽采采动卸压瓦斯技术研究
发布时间：2018-07-28 10:49
【摘要】：煤炭是我国国民经济发展的主要能源，瓦斯灾害连续多年影响着我国安全生产的总体形势，而卸压瓦斯抽采是煤层群瓦斯治理的重要途径，可以改善煤矿安全生产条件、提高煤矿的经济效益，实现煤与瓦斯安全共采。 系统地总结评述了近年来采动卸压瓦斯运移理论和高位钻孔治理瓦斯技术的研究成果及其应用现状，结合五虎山煤矿1201综采工作面开采条件，以室内煤岩体力学测试结果为基础，采用ANSYS软件，构建采场弹塑性模型，研究了采场围岩应力-采动裂隙场分布规律及围岩破断空间的应力分布特征，进而判断工作面上覆岩层受采动影响的“三带”分布情况；在理论分析与Fluent数值模拟的基础上，研究煤层群开采采动卸压瓦斯分布规律、尾巷对采空区瓦斯分布的影响等，进一步研究了回采空间采动瓦斯流场分布规律。最后，结合工作面瓦斯涌出来源分析及涌出量预测，，将基于数值模拟试验结果所设计的高位钻孔抽采采动卸压瓦斯方案在五虎山煤矿进行现场实验，考察单个钻孔抽采量随推进距离、抽采时间等因素的变化特征，并最终确定高位钻孔的合理布孔参数。 结果表明：数值模拟方法所得到的卸压瓦斯抽采参数布置合理，高位钻孔布置在采动裂隙场中，能取得良好的抽放效果，保证了工作面的安全生产，为优化卸压瓦斯抽采系统、实现煤与瓦斯安全共采提供了一定的理论依据和技术支持。
[Abstract]:Coal is the main source of energy for the development of national economy in our country. Gas disaster affects the overall situation of safety production in our country for many years, and unpressurized gas extraction is an important way to control gas in coal seam group, which can improve the safe production condition of coal mine. To improve the economic benefit of coal mine and realize the safe co-mining of coal and gas. This paper systematically summarizes and comments on the research achievements and application status of gas migration theory of mining movement and pressure relief in recent years and gas control technology with high drilling hole, combined with the mining conditions of 1201 fully mechanized mining face in Wuhushan Coal Mine. Based on the mechanical test results of indoor coal and rock mass, the elastic-plastic model of stope is constructed by using ANSYS software, and the distribution law of stress-mining fracture field and the stress distribution characteristics of surrounding rock fracture space are studied. On the basis of theoretical analysis and Fluent numerical simulation, the distribution law of mining pressure relief gas in coal seam group mining and the influence of tail roadway on gas distribution in goaf are studied. The distribution law of gas flow field in mining space is further studied. Finally, based on the analysis of the source of gas emission and the prediction of gas emission in the working face, field experiments are carried out in Wuhushan Coal Mine, which is based on the results of numerical simulation test. The variation characteristics of the extraction amount of a single borehole with the propulsive distance and extraction time were investigated, and the reasonable hole layout parameters of the high hole were determined. The results show that the pressure relief gas drainage parameters obtained by the numerical simulation method are reasonable, and the high level drilling holes are arranged in the mining fissure field, which can obtain a good drainage effect and ensure the safe production of the working face. In order to optimize the pressure relief gas drainage system, It provides certain theoretical basis and technical support to realize coal and gas safe co-mining.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712
本文编号：2149861
[Abstract]:Coal is the main source of energy for the development of national economy in our country. Gas disaster affects the overall situation of safety production in our country for many years, and unpressurized gas extraction is an important way to control gas in coal seam group, which can improve the safe production condition of coal mine. To improve the economic benefit of coal mine and realize the safe co-mining of coal and gas. This paper systematically summarizes and comments on the research achievements and application status of gas migration theory of mining movement and pressure relief in recent years and gas control technology with high drilling hole, combined with the mining conditions of 1201 fully mechanized mining face in Wuhushan Coal Mine. Based on the mechanical test results of indoor coal and rock mass, the elastic-plastic model of stope is constructed by using ANSYS software, and the distribution law of stress-mining fracture field and the stress distribution characteristics of surrounding rock fracture space are studied. On the basis of theoretical analysis and Fluent numerical simulation, the distribution law of mining pressure relief gas in coal seam group mining and the influence of tail roadway on gas distribution in goaf are studied. The distribution law of gas flow field in mining space is further studied. Finally, based on the analysis of the source of gas emission and the prediction of gas emission in the working face, field experiments are carried out in Wuhushan Coal Mine, which is based on the results of numerical simulation test. The variation characteristics of the extraction amount of a single borehole with the propulsive distance and extraction time were investigated, and the reasonable hole layout parameters of the high hole were determined. The results show that the pressure relief gas drainage parameters obtained by the numerical simulation method are reasonable, and the high level drilling holes are arranged in the mining fissure field, which can obtain a good drainage effect and ensure the safe production of the working face. In order to optimize the pressure relief gas drainage system, It provides certain theoretical basis and technical support to realize coal and gas safe co-mining.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712
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