煤矿深部开采煤层气含量计算的解析法

针对矿井深部煤层中地温和地应力梯度对煤的孔隙率和煤层渗透率的影响以及煤的吸附特性参数受温度影响变化的特点 ,在矿井深部煤层气压力解析算法的基础上 ,提出了考虑地温和地应力梯度影响的煤层气含量计算的新方法 .现场实测煤层气压力和理论计算的煤层气压力及煤层气含量的对比分析表明 ,该计算方法能较准确地反映现场实测结果 ,从理论上进一步完善了矿井深部煤层煤层气含量的计算方法 ,并对其分布规律的预测具有重要理论价值 .

Analytic Method of Calculating Gas Content in Coal Seams in Deep Mining

By considering the influence of in situ stress and ground temperature grads on the porosity and permeability of coal and the change of coal adsorption parameter with coalbed temperature in deep mining, a new method of calculating gas content in coal seams was put forward on the basis of the analytic formulas of calculating coalbed gas pressure in deep mining. Meanwhile, the contrast and analysis of the measured results of coalbed gas pressure and the theoretical values of coalbed gas pressure and gas content in coal seams indicate that this method can well reflect the authenticity of gas content in coal seams, further perfect the calculation method of gas content in coal seams in theory, and has important theoretical significance for analyzing gas content and forecasting its distribution law in coal seams in deep mining.