煤矿深部开采瓦斯压力计算的解析算法

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在考虑地应力和地温影响的基础上,提出了煤层瓦斯渗透率k(,θ)与平均应力和地温的关系及一维稳定流动的瓦斯渗流方程,并根据煤层在地表有无露头和通道的情况,导出了煤层瓦斯压力计算分析的解析式.现场实测和理论计算的比较分析表明,该算法能较准确反映实测结果,并从理论上进一步完善了煤层瓦斯压力的计算方法,对煤矿深部开采煤层瓦斯压力和含量的预测以及渗流场的分析具有重要意义. Based on the consideration of the influence of geostress and ground temperature, the relationship between the gas permeability k (, θ) of coal seam and the average stress and ground temperature and the gas seepage equation with one-dimensional steady flow are proposed. According to the presence or absence of outcrop and channel , The analytical formula of the calculation and analysis of gas pressure in coal seam is derived. The comparative analysis of field measurements and theoretical calculations shows that the proposed algorithm can reflect the measured results more accurately, and further improve the calculation method of gas pressure in coal seam theoretically. The prediction of gas pressure and content in coal seam deep mining and the analysis of seepage field have Significance.
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