黔西织纳煤田少普矿区16号煤煤层气富集的地质控制因素

摘要

The control of geological conditions on the coalbed methane（CBM）accumulation of No.16 coal seam in the Shaopu coal mining was discussed from four aspects：structure,coal seam thickness,burial depth of coal seam,and hydrogeologic condition.The following conclusions are drawn：the distribution of gas content in the present coal seam shows that the gas is controlled by folds,but gas is different in different fold positions due to different dev;it is very obvious that CBM content is influenced by thickness and the buried depth of coal seams,the coal seam and gas content,buried depth and gas content both shows certain positive correlation;meanwhile,the mining area groundwater condition of coalbed methane also has good sealing effect.Through the analysis of the geological factors configuration that：the central block of mining geological structure and development,coal thickness,buried depth,underground hydrodynamic weak enrichment to coalbed methane.%从构造、煤层厚度、煤层埋深和水文地质条件4个方面探讨了少普井田16号煤煤层气富集的地质控制规律。结果表明：现今煤层含气量的分布规律体现出褶皱控气的特征,其含气性在不同褶曲部位有所不同;煤层气含量受煤层厚度和煤层埋深的的影响也比较明显,煤层厚度与含气量、煤层埋深与含气量均呈现出一定的正相关性;同时,矿区地下水条件对煤层气也具有良好的封闭作用。通过配置分析各地质因素表明：矿区中部区块地质构造发育、煤层厚度大、埋藏深度大、地下水动力弱有利于煤层气的富集。