新元煤矿基于沿空留巷的瓦斯综合治理技术研究

发布时间：2018-05-21 10:27

本文选题：沿空留巷 + 采空区　；参考：《中国矿业大学》2017年硕士论文

【摘要】：本文在新元煤矿3107工作面高水材料巷旁充填沿空留巷的基础之上,采用理论分析、数值计算和现场试验相结合的方法,研究了采空区裂隙随工作面推进的发育演化规律,建立了符合现场情况的三维数值模型,得到了采空区瓦斯浓度分布规律,确定了工作面瓦斯综合治理技术,提出了3107工作面瓦斯治理方案,现场实践取得了较好的经济效益和安全生产效果。取得的成果如下:(1)综合运用经验公式法、仰孔注水探测法和数值模拟法研究了采空区冒落带和裂隙带的最大高度,确定了采空区冒落带范围为0-10m、裂隙带范围为10-36m及其孔隙率。(2)在经典矿压理论和O型圈理论的基础之上,研究了采空区上覆岩层的破断垮落特征,建立了符合现场情况的三维数值模型,得到了采空区瓦斯浓度分布规律,为瓦斯综合治理提供了依据。(3)通过理论分析和数值模拟的方法,确定了顺层钻孔、Y型通风配比、高位钻孔、采空区埋管的瓦斯治理参数。其中,Y型通风方式主副进风巷的配风比确定为3.3∶1,主进风巷风量为2000m3/min,辅助进风巷的风量为600m3/min。上述研究成果在新元煤矿3107工作面的现场应用,与U+L通风系统相比,实行Y型通风系统后,回风巷道最高瓦斯浓度为0.4%,沿空留巷浇筑墙体处最高瓦斯浓度0.56%,工作面配风量由3000m3/min降至2600m3/min,取得了较好的经济效益和安全生产效果,并为以后相似条件下的瓦斯治理技术提供了参考和依据。
[Abstract]:In this paper, on the basis of filling along goaf with high water material in 3107 face of Xinyuan Coal Mine, using the method of theoretical analysis, numerical calculation and field test, the law of development and evolution of the crack in goaf with the advance of working face is studied in this paper. A three-dimensional numerical model is established to fit the field situation, the distribution law of gas concentration in goaf is obtained, the comprehensive gas control technology of working face is determined, and the gas control scheme of 3107 working face is put forward. The field practice has achieved good economic benefit and safe production effect. The results obtained are as follows: (1) the maximum height of caving zone and fracture zone in goaf is studied by using empirical formula method, upside-hole water injection detection method and numerical simulation method. On the basis of the classical rock pressure theory and the O-circle theory, the authors have studied the characteristics of the overlying strata breaking and caving in the goaf on the basis of the classical rock pressure theory and the O-circle theory, and determined that the range of the caving zone in goaf is 0-10 m, and the range of fracture zone is 10-36 m and its porosity. A three dimensional numerical model is established in accordance with the field situation, and the distribution law of gas concentration in goaf is obtained, which provides a basis for comprehensive control of gas. By means of theoretical analysis and numerical simulation, the ratio of Y-type ventilation is determined by the method of theoretical analysis and numerical simulation. Gas treatment parameters of high-level boreholes and buried pipes in goaf. The air distribution ratio of the main and secondary air entry roadways is determined to be 3.3: 1, the air volume of the main air entry roadway is 2000 m3 / min, and the air volume of auxiliary air entry lane is 600 m3 / min. The application of the above research results in the 3107 face of Xinyuan Coal Mine is compared with that of the U L ventilation system, and after the Y type ventilation system is implemented, The maximum gas concentration in the return air roadway is 0.4 and the maximum gas concentration in the wall is 0.56 along the goaf roadway. The air distribution volume in the working face is reduced from 3000m3/min to 2600m3 / min, and good economic benefits and safe production results have been obtained. It also provides a reference and basis for the gas treatment technology under similar conditions in the future.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD712

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