Yunlong Jia, Zhengzheng Cao, Zhenhua Li, Feng Du, Cunhan Huang, Haixiao Lin, Wenqiang Wang, Minglei Zhai
International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, School of Civil Engineering, Henan Polytechnic University, Jiaozuo, 454000, Henan, China.
Henan Mine Water Disaster Prevention and Control and Water Resources Utilization Engineering Technology Research Center, Henan Polytechnic University, Jiaozuo, 454000, Henan, China.
Sci Rep. 2024 May 14;14(1):10982. doi: 10.1038/s41598-024-61968-6.
With the deep extension of coal mining in China, fault water inrush has become one of the major disasters threatening the safety production of coal mine. Based on the control equations of steady state and non-Darcy seepage in fractured rock mass, the multi-parameter nonlinear dynamic seepage equations of fractured rock mass are established in this paper. Based on the nonlinear dynamics theory, the function of the state variable in the system is derived, and the influence of the gradual change of non-Darcy flow factors on the structural stability of seepage system is studied. The research achievements show that there are three branches in the equilibrium state of the seepage system. Specifically, the stability of the equilibrium state changes abruptly near the limit parameter. The seepage dynamic system of fractured rock mass has the delayed bifurcation, and the coal mine disaster such as fault water inrush occurs easily at the bifurcation point. The research results are of great significance to enrich the theory of fault water inrush in coal mine, and to reveal the disastrous mechanism of fault water inrush and guide its prevention and control technology in coal mine, which can provide the theoretical reference for predicting the water seepage stability in fractured rock mass.
随着我国煤矿开采深度的不断延伸，断层突水已成为威胁煤矿安全生产的主要灾害之一。本文基于裂隙岩体稳态与非达西渗流控制方程，建立了裂隙岩体多参数非线性动态渗流方程。基于非线性动力学理论，推导了系统中状态变量的函数，研究了非达西流因素渐变对渗流系统结构稳定性的影响。研究成果表明，渗流系统平衡态存在三个分支。具体而言，在极限参数附近平衡态稳定性发生突变。裂隙岩体渗流动态系统具有延迟分岔现象，在分岔点附近易发生断层突水等煤矿灾害。研究结果对于丰富煤矿断层突水理论、揭示断层突水灾害机理并指导煤矿突水防治技术具有重要意义，可为预测裂隙岩体渗流稳定性提供理论参考。
