长平矿保护层开采卸压增透技术研究

发布时间：2018-06-03 04:38

本文选题：保护层开采 + 卸压增透　；参考：《辽宁工程技术大学》2013年硕士论文

【摘要】：长平煤矿瓦斯含量高、透气性低,煤层构造复杂。现在开采的3#煤四盘区是高瓦斯区,属于较难抽采煤层。随着开采水平的日益加深,瓦斯问题日渐突出,瓦斯隐患已严重威胁矿井的安全生产。通过对长平保护层开采卸压增透技术研究,为长平矿保护层开采及瓦斯抽采提供科学依据。在对长平矿地质条件分析的基础上,结合长平矿煤岩物理力学参数、地应力测量结果,应用理论分析、地质分析、实验研究和数值模拟等方法对长平矿保护层开采进行卸压增透技术研究。分析了长平矿保护层开采的可行性,得出长平矿8#煤作为3#煤的开采保护层是可行的,确定了3#煤四盘区的保护范围和各工作面保护范围；通过数值模拟研究了长平矿保护层开采后被保护层的应力分布规律、移动变形规律和透气性变化规律,研究结果表明,在保护层工作面采高大于1.2m,保护层和被保护层的层间距为37m左右时,保护层的开采能够使被保护层产生较好的卸压增透效果。采高越大,卸压增透效果越好；分析了保护层开采后被保护层煤层透气性变化规律,为被保护层卸压瓦斯抽采方式的选择和抽采钻孔的布置提供了理论依据；根据长平矿保护层开采应力分布规律、移动变形规律和透气性变化规律,结合保护层的开采条件,确定了保护层工作面合理的采高范围；初步提出了瓦斯抽采方案。
[Abstract]:Changping coal mine has high gas content, low permeability and complicated coal seam structure. Currently, the four-disk coal mining area is high gas area, which is difficult to extract coal seam. With the deepening of mining level, the gas problem is becoming more and more serious, and the hidden danger of gas has seriously threatened the safety of mine production. Through the research on pressure relief and antireflection technology of Changping protective layer mining, this paper provides scientific basis for the mining of protective layer and gas drainage in Changping Coal Mine. Based on the analysis of the geological conditions of Changping Mine, combined with the physical and mechanical parameters of coal and rock, the results of in-situ stress measurement, the application of theoretical analysis and geological analysis, Experimental research and numerical simulation are used to study the pressure relief and antireflection technology of protective layer mining in Changping Mine. The feasibility of mining protective layer in Changping coal mine is analyzed, and it is concluded that 8# coal in Changping coal mine is feasible as a protective layer of coal mining. The protection range of four plates of coal and the protection range of each working face are determined. Through numerical simulation, the distribution law of stress, the law of moving deformation and the law of change of permeability of protective layer after mining of protective layer in Changping mine are studied. The results show that, When the mining height is more than 1.2 m and the interval between the protective layer and the protected layer is about 37 m, the mining of the protective layer can make the protective layer produce better anti-reflection effect. The higher the mining height, the better the effect of pressure relief and antireflection, the change law of gas permeability of protected seam after mining is analyzed, which provides the theoretical basis for the selection of pressure relief gas extraction mode and the arrangement of drainage borehole. According to the distribution law of mining stress, the law of moving deformation and the law of change of permeability of protective layer in Changping Coal Mine, the reasonable mining height range of protective layer face is determined in combination with the mining condition of protective layer, and the scheme of gas drainage is put forward preliminarily.
【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】：2013
【分类号】：TD713

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