涌山矿石门揭煤突出主要影响因素及防治措施研究

发布时间：2018-05-08 06:09

本文选题：石门揭煤 + 煤与瓦斯突出　；参考：《辽宁工程技术大学》2013年硕士论文

【摘要】：涌山煤矿是一个煤与瓦斯突出矿井,尤其是在石门揭煤中突出强度大、破坏性强。随着开采深度的增加,地应力和瓦斯压力也相应增加,加大了煤与瓦斯突出的危险性。本文采用理论研究、现场实测、实验分析、计算机模拟等综合研究方法,对涌山煤矿石门揭煤过程中煤与瓦斯突出的主要影响因素进行了研究,并提出了适合该矿石门揭煤的防突措施。地应力、瓦斯压力、煤岩体的物理力学性质是影响煤与瓦斯突出的三个重要因素,本文分别采用不同的方法对涌山煤矿影响突出的这三个因素进行了研究。在理论研究方面,结合煤与瓦斯突出机理的研究成果,研究了石门揭煤的突出过程及此过程中各因素的作用,研究了煤层的力学性能、破坏准则,掌握了突出煤层的特点。选择了二、四、五三个主采煤层进行现场突出参数测定,通过测定的相关突出参数,结合矿区突出的历史资料对其进行了初步的分析整理和评判。对影响煤层透气性的因素进行了分析,研究了在石门揭煤过程中,煤层透气性的变化规律,测定了各煤层的透气性系数、钻孔瓦斯衰减系数,并通过这些参数对煤层的瓦斯抽采难易程度进行了分析,对实施瓦斯治理措施有一定指导意义。利用FLAC3D软件对石门揭煤过程中地应力的变化情况进行了模拟,结合现场实际突出情况对模拟结果进行了分析,得出了揭煤过程中巷道周围应力分布的规律,对现场采取煤层卸压措施有一定指导意义,从而有助于预防煤与瓦斯突出事故；对该矿石门揭煤提出了煤层瓦斯预抽、金属骨架、煤体固化三项防突措施,并取得了很好的效果。
[Abstract]:Gongshan coal mine is a coal and gas outburst mine, especially in Shimen uncovering coal outburst strength and destructive. With the increase of mining depth, the in-situ stress and gas pressure increase correspondingly, which increases the danger of coal and gas outburst. In this paper, the main influencing factors of coal and gas outburst in the process of uncovering coal in Shimen coal mine of Yongshan coal mine are studied by means of theoretical research, field measurement, experimental analysis, computer simulation and so on. At the same time, the measures of preventing outburst suitable for uncovering coal in Shimen mine are put forward. Ground stress, gas pressure and physical and mechanical properties of coal and rock mass are three important factors affecting coal and gas outburst. In the aspect of theoretical research, combined with the research results of coal and gas outburst mechanism, this paper studies the outburst process of Shimen uncovering coal and the role of various factors in the process, studies the mechanical properties and failure criteria of coal seam, and grasps the characteristics of outburst coal seam. Two, four and fifty-three main coal seams are selected to measure the outburst parameters in the field. Through the relevant outburst parameters measured, combined with the historical data of outburst in the mining area, the preliminary analysis and evaluation of the outburst parameters are carried out. The factors influencing the permeability of coal seam are analyzed, and the changing law of permeability of coal seam in the process of uncovering coal in Shimen is studied. The permeability coefficient of each coal seam and the attenuation coefficient of borehole gas are measured. Through these parameters, the difficulty degree of gas drainage in coal seam is analyzed, which is of certain guiding significance to the implementation of gas control measures. The variation of in-situ stress in Shimen coal uncovering process is simulated by using FLAC3D software, and the simulation results are analyzed in combination with the actual outburst situation on the spot, and the law of stress distribution around the roadway during coal uncovering is obtained. It is helpful to prevent coal and gas outburst accidents, and three measures of preventing coal seam gas pre-drainage, metal skeleton and coal body solidification are put forward. And achieved good results.
【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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