沙曲矿2号煤层瓦斯赋存规律研究  

Research on gas occurrence law of No.2 coal seam in Shaqu Mine

作　　者：刘明杰 Liu Mingjie(State Key Laboratory of Coal and CBM Co-mining,Jincheng 048012,China;Yi′an Lanyan Coal and Coalbed Methane Co-mining Technology Co.,Ltd.,Taiyuan 030000,China)

机构地区：[1]煤与煤层气共采国家重点实验室,山西晋城048012 [2]易安蓝焰煤与煤层气共采技术有限责任公司,山西太原030000

出　　处：《能源与环保》2020年第10期100-105,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：2018年晋煤科学技术项目(LYJS-JSKF-2018-0015);山西省科技重大专项(MQ2016-01);山西省科技重大专项(20191102001);山西省自然科学基金(201901D111005(ZD))。

摘　　要：瓦斯是地质作用的产物,从地质角度研究煤层瓦斯赋存规律及其控制因素是矿井瓦斯防治最为基础的工作和行之有效的方法。基于煤田地质勘查、矿井地质及相关瓦斯测试参数等资料,采用瓦斯地质理论和数理分析方法,对沙曲矿2号煤层瓦斯赋存规律进行了研究。研究结果表明:沙曲矿2号煤层瓦斯赋存规律主要受地质构造、地下水动力条件、煤层埋深、煤层围岩特征、煤变质作用等地质因素及其耦合作用控制。地质构造多具有封闭保存瓦斯性能,是控制煤层瓦斯赋存局部不均衡性的关键地质因素;地下水动力弱且具有承压性,对瓦斯保存起到良好的封堵效应;一定厚度的泥质岩是瓦斯保存的良好盖层,埋深与瓦斯含量关系显著,埋深越大,瓦斯含量越高,反之亦然;煤的变质程度相对较高,煤层生烃动力强,有利于煤层生烃和提高瓦斯含量。Gas is the product of geological action.The study of the law of coal seam gas occurrence and its controlling factors is the most basic and effective method for mine prevention and control.Based on the data of coalfield geological exploration,mine geology and relevant gas test parameters,the gas occurrence law of No.2 coal seam in Shaqu Mine was studied by using gas geology theory and mathematical analysis method.The results showed that the occurrence rule of No.2 coal seam is mainly controlled by geological structure,groundwater dynamic condition,depth of coal seam,characteristics of surrounding rock of coal seam,coal metamorphism and other geological factors and their coupling effects.Geological structure is the key geological factor to control the local unbalance of coal seam gas,which has the property of sealing and preserving gas.Groundwater has weak dynamic and bearing pressure,which has a good blocking effect on gas preservation.A certain thickness of argillaceous rock is a good cap layer for gas preservation,and there is a significant correlation between the buried depth and the gas content.The greater the buried depth,the higher the gas content,and vice versa.The metamorphic degree of coal is relatively high and the hydrocarbon generation dynamic of coal seam is strong,which is conducive to hydrocarbon generation and gas content improvement in coal seam.

关 键 词：沙曲矿 2号煤层 瓦斯赋存规律 主控地质因素 

分 类 号：TD712.2[矿业工程—矿井通风与安全]