黄河北煤田赵官井田煤层瓦斯赋存规律及主控因素

基于煤层瓦斯的生成、赋存、运移理论，结合地质勘探和矿井生产揭露的瓦斯地质资料，分析了山东黄河北煤田赵官井田煤层瓦斯赋存规律及其主控因素。从区域地质演化、煤的生储气能力、岩性组合特征、地质构造、埋藏深度、基岩厚度、水文地质条件和岩浆侵入等因素综合研究发现，影响赵官井田煤层瓦斯赋存的主控因素为地下水动力条件及岩浆侵入事件。地下水动力条件对煤层瓦斯的控气作用明显，浅部水动力条件对煤层瓦斯主要表现为水力运移逸散作用，不利于煤层瓦斯保存，向深部主要表现为封闭和封堵2种类型，有利于瓦斯的保存。岩浆侵入煤层的方式及其程度是造成下组煤（11号、13号煤）瓦斯含量普遍低于上组煤（7号、10号煤）的主控因素。 

Storage rule and controlling factors of coalbed gas in Zhaoguan mine field of Huanghebei coalfiled

Storage rule and controlling factors of coalbed gas in Zhaoguan mine field were analyzed on the basis of the generation, storage and migration theory of coalbed gas in combination with the data of geological exploration and mine production. From research on the regional geological evolution, coal generating and storing capacity and lithologic characteristics, geological structure, burial depth, bedrock thickness, hydrogeological conditions and magmatic intrusion, it was found that underground hydrodynamic conditions and magmatic intrusion events are the controlling factors of coalbed gas storage in the mine. Underground hydrodynamic conditions had obvious effect, shallow hydrodynamic conditions were manifested mainly as migration and escape and were unfavorable to the conservation of coalbed gas. The deep hydrodynamic conditions were presented mainly as sealing and blockage, advantageous to the storage of gas. The manner and degree of magmatic intrusion of coal seams were the major controlling factors resulting in the lower gas content in seam 11 and 13 than that in seam 7 and 10.