煤矿深部开采瓦斯压力计算的解析算法

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．

INVESTIGATION OF ANALYTIC METHOD FOR COALBED GAS PRESSURE IN HIGH TEMPERATURE AND DEEPLY MINING MINES

Considering deeply the influence of insitu stress and geothermal temperature on coalbed gas, it is put forward that the relation between coal permeability and effective stress as well as geothermal temperature and the onedimensional stable gas flow equation. On the basis of coal seam having outcrop of coal seam and outlet on ground or not, the analytic formulas of calculating coalbed gas pressure are developed. Meanwhile, the contrast and analysis of measuring results with theoretically computing results indicates that the analytic method of calculating coalbed gas pressure can reflect more accurately actual situation. The research results further perfect the method in theory and have important action on the analysis of distribution law of coalbed gas pressure in deep mining and coalbed gas seepage.