煤层瓦斯主要赋存影响因素筛查--以河南汝州煤田朝川矿区二_(1)煤层为例  

Screening of main occurrence factor of coal seam gas:An case study of No.2-1 coal seam in Chaochuan mining area,Ruzhou coal field,Henan

作　　者：乐志军 徐永良 杨予生 陈良立 LE Zhijun;XU Yongliang;YANG Yusheng;CHEN Liangli(Henan fourth Institute of Resources and Environment Investigation,Zhengzhou 450000,Henan,China)

机构地区：[1]河南省资源环境调查四院,河南郑州450000

出　　处：《矿产与地质》2023年第5期1090-1097,共8页Mineral Resources and Geology

摘　　要：煤矿瓦斯赋存与众多地质因素相关,包括煤的变质程度、围岩性质、埋藏深度、水文地质条件、构造发育等。其中起主要作用的可能只是少数,且在不同条件下起主要作用的因素可能不同。如何在众多的地质因素中确定主要因素,是解决问题的关键。为了研究清楚朝川矿区二_(1)煤层瓦斯赋存影响主要因素从而服务于煤矿生产,文章基于瓦斯地质理论,通过定量的方式分析研究了朝川矿区构造、二_(1)煤层钻孔瓦斯含量,生产矿井鉴定瓦斯相对涌出量、绝对涌出量等方面的关系及规律,确定了朝川矿区二_(1)煤层瓦斯赋存的主要影响因素为地质构造,次要因素为埋藏深度,而围岩性质、煤的变质程度和地下水文因素对瓦斯的赋存影响较小。本次研究成果,可为地质条件类似的煤矿在瓦斯研究、监测及管理方面提供借鉴。The occurrence of coal seam gas is related to many geological factors,including the metamorphic degree of coal,the nature of surrounding rock,burial depth,hydrogeological condition,and structural development.Only a few of them may play a major role,and the factors that play a major role may be different under different conditions.How to determine the main factor among the numerous geological factors is the key to solve the problem.In order to study the main factor affecting the gas occurrence in No.2-1 coal seam of Chaochuan mining area and to serve the coal mine production,based on the gas geological theory,this paper analyzes and studies the relationship and regularity of the structure in Chaochuan mining area,the gas content in the No.21 coal seam drilling holes,the relative and absolute gas outflow amount identified by the production wells,and determines that the main factor affecting the gas occurrence in No.2-1 coal seam of Chaochuan mining area is geological structure.The secondary factor is the burial depth,and the nature of surrounding rock,the metamorphic degree of coal and underground hydrological factor have little influence on the occurrence of gas.The research result can provide a reference for gas research,monitoring and management of coal mines with similar geological condition.

关 键 词：瓦斯 涌出量 地质因素 埋藏深度 地质构造 

分 类 号：TD712[矿业工程—矿井通风与安全]