Numerical Simulation Analysis and Prevention Measures of Dynamic Disaster Risk in Coal Seam Variation Areas During Deep Mining

作者：Chenglin Tian, Xu Wang, Yong Sun, Qingbiao Wang, Xuelong Li, Zhenyue Shi, Keyong Wang · 发表于：Sustainability · 年份：2025 · DOI：10.3390/su17030810 · 被引用次数：5 · 研究领域：Coal Properties and Utilization、Geoscience and Mining Technology、Rock Mechanics and Modeling

Deep coal mining is essential for energy use and sustainable development. In a situation where coal–rock–gas dynamic disasters are prone to occur in coal seam variation areas affected by different degrees of roof angle during deep coal seam mining, a disaster energy equation considering the influence of roof elastic energy is established, and the disaster energy criterion considering the influence of roof elastic energy is derived and introduced into COMSOL6.1 software for numerical simulation. The results show that, compared with the simple change of coal thickness and coal strength, the stress concentration degree of a thick coal belt with small structure is higher, and the maximum horizontal stress can reach 47.6 MPa. There is a short rise area of gas pressure in front of the working face, and the maximum gas pressure reaches 0.82 MPa. The plastic deformation of the coal body in a small-structure thick coal belt is the largest, and the maximum value is 18.04 m3. The simulated elastic energy of rock mass is about one third of that of coal mass, and the influence of the elastic energy of roof rock on a disaster cannot be ignored. When the coal seam is excavated from thin to thick with a small-structural thick coal belt, the peak value of the energy criterion in front of the excavation face is the largest, and the maximum value is 1.42, indicating that a dynamic disaster can occur and the harm degree will be the greatest. It is easy to cause a coal and gas outburst accident w...