摘要
采用评价、校正后的246个钻孔煤层瓦斯含量点绘制了嵩箕构造区主要煤田二1煤层瓦斯含量等值线图,通过分析比较各煤田瓦斯地质特征,总结了区域构造对瓦斯分布的控制规律。受后期构造变动破坏盖层的影响,嵩箕构造区煤层瓦斯含量总体偏低。构造区南部由于受秦岭造山带的影响,构造复杂,致使登封、新密、禹县等煤田瓦斯含量较低;靠近北纬35°带的新安、偃龙煤田受区域岩浆热的影响,煤变质程度较高,具有较高的吸附瓦斯能力,然而由于区内大型平移断层、掀斜断块发育,导致煤层瓦斯散失,瓦斯含量降低。
Adopting 246 available data , which had been evaluated and corrected,of Ⅱ1 coal seam gas content , the gas content contour map of Songji tectonic zone was drawn. Through the analysis of the gas geology of different coal fields,the controlling regularity of re-gional tectonic on gas distribution was summarized. Effected by late tectonics which destroyed the cap rock,the gas content of Ⅱ1 coal seam was overall small in Songji tectonic zone. In southern Songji tectonic zone which was affected by the Qinling orogenic belt, the structure is complex, which made the gas content small in Dengfeng, Xinmi, Yuxian coal fields and so on. Xin＇an, Yanlong coal fields near the north latitude 35° were influenced by regional magmatic thermal,so the coal metamorphism is deeper which made the coal seam has higher ability of gas adsorption. However, due to the large strike-slip faults and tilted fault blocks developed well in the area, the coal seam gas was lost and the gas content was small.
出处
《中州煤炭》
2016年第12期117-122,共6页
Zhongzhou Coal
基金
国家自然科学基金资助(41206037)
河南工程学院博士基金项目(D2015010)
