煤层深部开采瓦斯赋存规律与临界采深研究  

Study on Gas Occurrence Rule and Critical Mining Depth in Deep Mining of Coal Seam

作　　者：邹永洺 ZHOU Yongming(General Research Institute of Coal Science,Beijing 100013,China;Shenyang Research Institute of China Coal Science and Technology Group Co.,LTD.,Shenfu Demonstration Zone,Liaoning Province 113122,China;National Key Laboratory of Coal Mine Disaster Prevention and Control,Shenfu Demonstration Zone,Liaoning Province 113122,China)

机构地区：[1]煤炭科学研究总院,北京100013 [2]中煤科工集团沈阳研究院有限公司,辽宁沈抚示范区113122 [3]煤矿灾害防控全国重点实验室,辽宁沈抚示范区113122

出　　处：《煤》2024年第10期10-13,55,共5页Coal

基　　金：国家重点研发计划项目(2023YFB3211000);国家自然科学基金资助项目(52174229,52174230);辽宁省自然科学基金资助项目(2022-KF-23-03,2023-MS-355)。

摘　　要：文章以多所煤矿作为研究对象,采用实验测试和现场应用结合的研究方法,在不同环境下研究煤层瓦斯赋存特征,进而对深部开采的临界深度进行分类。首先基于原生孔隙结构特征,对不同变质程度煤的孔径分布规律进行了分析;其次,进行了煤层瓦斯吸附特征研究,确定了不同温度、压力和埋藏深度条件下深部煤层瓦斯吸附规律;最后,分析了孔隙率、视密度、真密度和吸附特征与煤层埋深的关系,对深部煤层开采临界线进行了划分,确定了临界线为870 m,验证了我国煤矿的深部资源开采深度可界定的范围。Taking many coal mines as the research object,the characteristics of coal seam gas occurrence are studied in different environments by combining experimental testing and field application,and then the critical depth of deep mining is classified.Based on the characteristics of primary pore structure,the pore size distribution of coal with different metamorphic degree is analyzed.Secondly,the characteristics of coal seam gas adsorption are studied,and the law of deep coal seam gas adsorption under different temperature,pressure and burial depth is determined.Finally,the relationship between the porosity,apparent density,true density and adsorption characteristics and the buried depth of coal seam is analyzed,and the critical line of deep coal seam mining is divided,and the critical line is determined to be 870 m,which verifies the range of deep resource mining depth can be defined in China.

关 键 词：煤层 深部开采 瓦斯赋存规律 临界采深 吸附特征 

分 类 号：TD712.2[矿业工程—矿井通风与安全]