格目底向斜地质构造特征及其对瓦斯赋存的影响研究
Gemudi syncline geological structure characteristics and its influence on gas occurrence
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摘要: 为探明贵州水城县格目底向斜构造特征及其对瓦斯赋存控制影响,通过收集整理格目底向斜矿井瓦斯地质资料和生产资料,深入分析格目底向斜构造特征及其对矿井瓦斯赋存影响,并总结了该区域瓦斯赋存规律。结果表明:格目底向斜是1个呈NW走向的不对称向斜;北东翼地层倾角陡立,向东端地层倾角由85°逐渐减小为45°,南西翼地层相对平缓一般在15°~25°之间;煤层经历多起瓦斯生成过程,且受构造综合作用影响,煤层分化情况严重,造成含煤层数多,可采煤层数少,以薄煤层及中厚煤层为主;北东翼煤层瓦斯含量要高于南西翼,且同一瓦斯区及同一矿井中,由于次级褶皱、压性逆断层及张性正断层等局部构造不同,导致瓦斯赋存状态也存在差异。Abstract: In order to explore the structural characteristics of Gemudi syncline and its influence on gas occurrence control in Shuicheng County, Guizhou Province, the geological data and production data of Gemudi syncline mine were collected, and the structural characteristics of Gemudi syncline and its influence on the gas occurrence of the mine were analyzed in depth, and the gas occurrence law in the region was summarized. The results show that Gemudi syncline is a NW-trending asymmetric syncline. The dip angle of strata in the northeast wing is steep, and the dip angle to the east end gradually decreases from 85° to 45°, and the relatively flat strata in the southwest wing are generally between 15° and 25°. The coal seam experienced multiple gas generation processes, and affected by the comprehensive effect of structure, the coal seam differentiation was serious, resulting in that the quantity of coal seams is large, but the number of coal seams that can be mined is small, mainly thin coal seam and medium-thick coal seam. The gas content of the coal seam in the northeast wing is higher than that in the southwest wing. In the same gas area and the same mine, due to the different local structures such as secondary folds, compressive reverse faults and tensile normal faults, the gas occurrence states are also different.
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Keywords:
- Gemudi syncline /
- geological structure /
- gas occurrence /
- tectonic evolution /
- gas content
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