羊叉滩井田瓦斯分布的构造控制

Control of geological structure on gas distribution

针对羊叉滩井田地质构造及特征,分析了地质构造对二叠系煤层中瓦斯分布的控制作用。研究表明:该区煤层瓦斯分布主要受控于两河口向斜构造的影响。向斜轴部地应力相对集中、煤层埋藏较深,瓦斯质量浓度也明显较大;而向翼部,随煤层埋藏变浅,煤层中瓦斯的质量浓度也逐渐降低。整体而言,由于井田内次级构造发育,瓦斯质量浓度较高,具有瓦斯突出危险性。

The paper introduces the discussion of control of geological structure on gas outburst in Dyas, based on detailed study on geological characteristic in Yangchatan mining area. Results show that the gas distribution in area under study is mainly controlled by Lianghekou syncline. The highly tectonic stress and deep embedment of coal seam in synclinal axis result in the obviously larger gas content. The decreasing embedded depth of coal seam from synclinal axis to limbs in coal seam leads to the gradually decreasing gas content. Very developed secondary structure and greater gas content all over the mining area subject the area under study a greater exposure to the gas outburst.