基于应力-渗流-损伤耦合作用的煤矿突水模拟

Simulation of coal mine water inrush based on stress seepage damage coupling

突水是影响煤矿安全生产的重大灾害问题之一。本文以山西阳泉煤矿顶板突水为例,考虑突水破坏过程中岩体损伤的判别依据,及其对煤岩体力学性质的影响,建立应力-渗流-损伤耦合模型,阐述了煤岩体破坏的损伤演化过程与渗流突水机理。结果表明,顶板岩体损伤区域贯通、两侧裂隙网络交汇是造成阳泉煤矿顶板突水的根本原因。在此过程中,煤岩体中的裂隙延展、渗流状态与应力演化之间的相互作用,导致岩体损伤破裂形成贯通性的导水通道,诱发突水灾害。研究结果为矿山隔水煤柱的留设提供了依据,也为煤矿顶板突水问题提供了研究思路。

Water inrush is one of the major disasters affecting coal mine safety production.This paper takes the roof water inrush of Shanxi Yangquan coal mine as an example,considers the judgment basis of rock mass damage in the process of water inrush failure,and its influence on the mechanical properties of coal and rock mass,establishes a stress-seepage-damage coupling model,and elaborates the failure of coal and rock mass of the damage evolution process and seepage water inrush mechanism.The results show that the penetration of the roof rock mass damage area and the intersection of the fissure networks on both sides are the fundamental reasons for the roof water inrush in Yangquan coal mine.In this process,the interaction between the fracture extension,seepage state and stress evolution in the coal and rock mass causes the damage and fracture of the rock mass to form a permeable water channel,which induces water inrush disasters.The research results provide a basis for the retention of water-proof coal pillars in mines,and also provide research ideas for the problem of coal mine roof water inrush.