摘要
为解决煤与瓦斯突出煤层采空区瓦斯治理难题,文章系统分析了采空区瓦斯来源及运移特征,明确了采空区瓦斯分布与裂隙发育规律的内在关联,精准定位了瓦斯富集区域,并针对性提出采空区瓦斯治理技术方案。研究表明,煤矿开采过程中产生的采动裂隙,是瓦斯储存的核心空间与抽采的关键目标区域。煤层瓦斯在压力差驱动下发生解吸与扩散,通过离层裂隙、穿层裂隙等通道进入裂隙带富集。高位定向长钻孔瓦斯抽采技术可实现采空区瓦斯高效抽采,其中裂隙带中部是布设高位定向长钻孔的关键区域,该技术的抽采效果主要受煤壁支撑影响区长度、有效抽采裂隙带高度等因素调控。研究成果可为同类条件下采空区瓦斯治理提供理论支撑与实践参考。
To solve the gas control problem in the goaf of coal and gas outburst coal seams,this paper systematically analyzes the gas sources and migration characteristics in the goaf,clarifies the internal relationship between gas distribution and fracture development law in the goaf,accurately locates the gas enrichment area,and puts forward targeted gas control technology schemes for the goaf.The research shows that the mining-induced fractures generated during coal mining are the core space for gas storage and the key target area for gas extraction.Driven by pressure difference,coal seam gas is desorbed and diffused,and enters the fracture zone for enrichment through channels such as bed separation fractures and cross-layer fractures.The gas extraction technology using high-level directional long boreholes can realize efficient gas extraction in the goaf.The middle part of the fracture zone is the key area for arranging high-level directional long boreholes,and the extraction effect of this technology is mainly regulated by factors such as the length of the coal wall support influence area and the height of the effective extraction fracture zone.The research results can provide theoretical support and practical reference for gas control in goaf under similar conditions.
作者
尹智勇
YIN Zhiyong(Shaanxi Changwu Tingnan Coal Industry Co.,Ltd.,Xianyang 713600,China)
出处
《化工管理》
2026年第2期153-156,共4页
Chemical Management
关键词
煤与瓦斯突出煤层
采空区
瓦斯运移
高位定向长钻孔
钻孔层位
coal and gas outburst coal seam
goaf
gas migration
high-level directional long borehole
borehole horizon
