摘要
在煤矿生产过程中,采空区的瓦斯灾害是威胁煤矿安全生产的重大隐患。由于采煤作业导致煤层空间遭到扰动,使得煤层裂隙大量增加,原先赋存于煤层中的瓦斯就会大量涌入采空区。为了实现采空区瓦斯的有效治理,需要深入研究工作面在回采期间,采空区上覆岩层垮落后形成的“三带”特征及裂隙发育规律。以余吾煤矿N1100工作面为研究对象,采用UDEC仿真软件模拟工作面回采期间的覆岩破坏情况,分析“三带”的分布特征及裂隙发育规律。研究结果显示,垮落带高度约为13 m,裂隙带高度约为60~70 m,裂隙区呈现“梯形”发育特征。同时,采空区中部形成了压实区,裂隙被挤压压实。深入揭示采空区“三带”分布及裂隙发育规律,对于优化瓦斯治理措施、提高煤矿安全生产水平具有重要指导意义。
In the coal mining production process,gas hazards in the goaf area are a major threat to safe coal mining operations.Due to the coal mining activities,the coal seam space is disturbed,resulting in a significant increase in coal seam fractures,and the gas originally stored in the coal seam will pour into the goaf area in large quantities.To achieve effective gas control in the goaf area,it is necessary to conduct in-depth research on the“three zones”characteristics and fracture development patterns formed after the overlying rock collapse during the mining process of the working face.We take the N1100 working face of the Yuwu Coal Mine as the research object,using the UDEC simulation software to simulate the overlying rock failure during the mining process of the working face,and analyze the distribution characteristics and fracture development patterns of the“three zones.”The research results show that the height of the collapse zone is about 13 m,the height of the fracture zone is about 60~70 m,and the fracture zone exhibits a“trapezoidal”development pattern.At the same time,a compaction zone is formed in the middle of the goaf area,where fractures are compressed and compacted.
作者
李云
潘超
LI Yun;PAN Chao(Yuwu Coal Industry Co.,Ltd.,Shanxi Lu’an Group,Changzhi 046101,China;School of Safety Engineering,China University of Mining&Technology,Xuzhou 221116,China)
出处
《陕西煤炭》
2025年第7期33-38,共6页
Shaanxi Coal
关键词
采空区
三带
裂隙发育
厚煤层
goaf
three zones
fracture development
thick coal seam
