采动影响下断层分带间联动演化诱发突水灾变机制研究

断层带一般由断层核、破裂带和围岩三部分组成，具有强度低、易滑移、影响范围广等特点。在深部采动效应与强渗压水-岩作用下，断层等构造的破裂带与核部破碎带之间联动演化诱发水力特征变化形成导水通道是突水等众多灾害发生的实质。项目以断层分带结构为研究对象，采用理论分析、室内试验和现场监测数据相结合开展如下研究：1）构建断层分带结构力学模型，开展断层分带间应力传导及滑移破坏机制研究，探究原生构造与新生裂隙协同演化特征，揭示断层分带间联动演化力学机制；2）建立断层破裂带岩体水-岩分析数值模型，结合断层破裂带和核部破碎带岩体渗流试验，探究断层分带联动演化过程中的水力特征变化；3）应用数字图像等技术，将数值模拟与现场实测数据相结合，构建精确反映断层分带的三维数值模型，探究采动影响下断层分带之间联动演化诱发突水致灾过程。研究成果对近断层区域煤炭安全高效开采具有重要价值，为突水灾害溯源和防控提供理论和现实依据。

Fault generally comprises fault cores, rupture zones, and surrounding rocks. Fault features low strength, easy slippage, and a wide range of influence, among others. Under the mining effect and water-rock interactions with high osmotic pressure, water-conducting channels are formed in the fracture zones and core fracture zones of geological structures like faults, which can lead to the changes in hydraulic characteristics. With the fault zone in the studied stope as a research object, the following studies were conducted through theoretical analysis, laboratory tests, and field monitoring data analysis: 1) Built a mechanical model of the fault zoning structure, conducted mechanical tests on the rock mass sample of the fault zone, and explored the stress transmission mechanism of the zoning structure and the mechanism of coordination between the primary structure and new fractures in order to examine the mechanical characteristics of linkage evolution of the fault zone; 2) Built a numerical model for water-rock analysis of the ruptured rock mass in the fault zone, and explored the characteristics of hydraulic disasters of the fault zoning structure during linkage evolution based on the fracture evolution of the rock mass and seepage test results of fractured rock mass; 3) By digital image technology and combining numerical simulation with field measurement, a three-dimensional numerical analysis model of stope was constructed to accurately reflect the fault zoning, and the catastrophic process of water inrush induced by the joint evolution of fault zone in stope was revealed. The research results have important value for the safe and efficient mining of coal near fault area, and provide a theoretical and practical basis for the tracing, prevention and control of water inrush disaster.