宿南矿区主采煤层含气量特征及其影响因素分析

Analysis of Gas Content Characteristics and Influencing Factors in Main Mining Coal Seams from Su’nan Mining Area

摘要: 为探究宿南矿区主采煤层含气量特征及其影响因素，本文对煤层含气量及其组分进行了测定，并对其影响因素进行了分析。结果表明：祁南煤矿7-2煤层含气量为0.26~27.62 m³/t (平均12 m³/t)。组分中，CH₄含量为16.34%~97.61%，平均为72.71%；CO₂和N₂分别为0.2%~15.07% (平均3.5%)和1.2%~69.9% (平均为17.34%)。祁东煤矿8-2煤层含气量为0.05~15.24 m³/t (平均为6.99 m3/t)。组分中，CH₄含量为4.89%~98.54%，平均为72.83%，CO₂和N₂占比分别为0.51%~50.29% (平均为8.33%)和0.41%~77.51% (平均为22.04%)。含气量与煤层埋深成正相关，CH₄、CO₂和N₂与煤层埋深没有相关性。

Abstract: In order to explore the characteristics and influencing factors of the gas content in the main coal seams from the Su’nan Mining Area, the gas content and components of the selected coal seams were tested, and the influencing factors were analyzed in this paper. The results show that the gas content of No. 7-2 coal seam from Qi’nan Coal Mine is 0.26~27.62 m³/t (average of 12 m³/t). For the components, CH₄ content accounts for 16.34% to 97.61%, with an average of 72.71%. The CO₂ and N₂ are 0.2%~15.07% (average of 3.5%) and 1.2%~69.9% (average of 17.34%), respectively. The gas content of No. 8-2 coal seam from Qidong Coal Mine is 0.05~15.24 m³/t (average of 6.99 m3/t). For the components, the CH₄ content accounts for 4.89% to 98.54%, with an average of 72.83%. The CO₂ and N₂ are 0.51%~50.29% (average of 8.33%) and 0.41%~77.51% (average of 22.04%), respectively. The gas content is directly proportional to the burial depth of coal seam, while CH₄, CO₂, and N₂ are not correlated with the burial depth of coal seams.