Li Zhaotai, Zhou Yuejin, Xu Xiaoding, Xiao Yuhang, Xu Yunong
State Key Laboratory of Intelligent Construction and Construction and Healthy Operation, Maintenance of Deep Underground Engineering, China University of Mining and Technology, 221008, Xuzhou, Jiangsu, China.
School of Mechaics and Civil Engineering, China University of Mining and Technology, 221008, Xuzhou, Jiangsu, China.
Sci Rep. 2025 Jan 11;15(1):1660. doi: 10.1038/s41598-024-79523-8.
In coal mining operations, it is often challenging to control the deformation of the roadway in front of the working face. The excessive stress from the surrounding rock of the working face and the difficulties in caving the goaf roof have led to a prominent factor that hinders safe and efficient production in coal mines. For this reason, a mechanical model of the stress field in the advance roadway of the working face is established, and the stress evolution law of the surrounding rock before and after cutting the roof of the roadway is analyzed. Key parameters such as cutting depth, cutting angle, and hole spacing are determined through theoretical calculation, numerical simulation with 3DEC numerical software, and field testing. A kind of roof cutting and pressure relief techniques (TCPAF) for enhanced roadway safeguarding in advance mining face is proposed, and its effectiveness is verified through field testing. The results indicate that the stress on the low-stress side of the leading roadway remains slightly increased, while on the high-stress side, stress decreases significantly, optimizing the stress environment of the surrounding rock. In addition, the research results provide a scientific basis for similar conditions of roadway deformation.
在煤矿开采作业中，控制工作面超前巷道的变形往往具有挑战性。工作面围岩的过大应力以及采空区顶板垮落的困难，已成为阻碍煤矿安全高效生产的一个突出因素。为此，建立了工作面超前巷道应力场的力学模型，分析了巷道顶板切割前后围岩的应力演化规律。通过理论计算、采用3DEC数值软件进行数值模拟以及现场测试，确定了切割深度、切割角度和炮孔间距等关键参数。提出了一种用于加强采煤工作面超前巷道支护的顶板切割卸压技术（TCPAF），并通过现场测试验证了其有效性。结果表明，超前巷道低应力侧的应力略有增加，而高应力侧的应力显著降低，优化了围岩的应力环境。此外，研究结果为类似巷道变形情况提供了科学依据。
