淮南矿区煤层气含气性分析——以13煤为例

CBM Gas-bearing Property Analysis in Huainan Mining Area——A Case Study of Coal No.13

通过收集淮南矿区顾桥矿、潘三矿和丁集矿13煤层煤样的等温吸附实验数据,对13煤的含气性进行了分析。研究结果表明:淮南矿区13#煤层最大吸附量变化范围为15.85～20.12 m^3/t,平均为17.33 m^3/t,朗格缪尔压力为0.89～1.94 MPa,平均为1.37 MPa;13#煤层气含气量变化于0.48～31.90 m^3/t,平均为9.35 m^3/t;13#煤层的理论饱和度变化于2.93%～186.43%,平均理论饱和度为53.89%,含气理论饱和度局部较高,可达190%;不同钻孔取样测试的煤层含气量差异较大,最高可达33.5 m^3/t,最低为4.9 m^3/t;受地质因素影响,煤层气含气量随深度变化的差异不明显,在平面上由南到北整体上呈逐渐降低的趋势。

Based on the sample isothermal adsorption tested data from coal No.13 of the Guqiao,Panji No.3 and Dingji coalmines,Huainan mining area carried out gas-bearing property analysis.The result has shown that:Huainan mining area coal No.13 maximum adsorptive capacity variation range is 15.85~20.12m^3/t,average 17.33m 3/t;Langmuir pressure 0.89~1.94MPa,average 1,37MPa;coal No.13 CBM gas content 0.48~31.90m 3/t,average 9.35m^3/t;theoretical saturation 2.93%~186.43%,average 53.89%,local part rather high can be 190%as high.CBM gas content has large difference of samples from different boreholes,the highest can be 33.5m^3/t,lowest 4.9m^3/t.Because of geological factors,gas content difference with depth is not obvious;horizontally,as a whole,from south to north presents gradually decreasing trend.