采空区系统失稳灾变链式效应机理及特性研究

Study on Mechanism and Characteristics of Mine Goaf Destabilization Chain Effect

以矿山采空区为研究对象,引入系统理论,建立了采空区系统模型。基于链式结构理论体系,对采空区失稳灾变的内在演化规律及特性进行了深入研究,建立了采空区失稳灾变链式框架图,划分了失稳灾变链式演化阶段,并基于非线性动力学理论建立了系统失稳的能量判据。研究表明,采空区并不是孤立的,而是与其赋存环境构成了一个开放式系统。采空区系统的失稳灾变具有支干流域-周期循环-冒落劈裂复合链式特征。采空区系统失稳灾变链式演化经历了早中晚3个阶段,并伴随着能量"一涨一落"式的发展及内部节理裂隙的闭合、扩展、贯通及破裂的演化过程。从系统理论角度入手,初步形成采空区失稳灾变链式理论,为更有效地控制矿山采空区稳定性提供了新的理论基础。

Taking the mine goaf as research object, the systems theory was introduced to establish a goaf system model. Based on the theoretical system of chain structure, the evolutionary process and characteristics of goaf destabi- lization were intensively studied, and the chain framework was modeled. Chain evolutionary stages were divided and the energy criterion model was established based on nonlinear dynamics. Research shows that the goaf is not isolated, but an open system comes into being with its existing environment. The goaf destabilization process shows obvious chain characteristics, a coupled chain of dry - valley, caas - cyclic and caving - splitting. The goaf characteristics chain processes three stages with the rise and fall of energy and evolutionary process including the closing, expan- ding, coalescence and breaking of joint plane. The goal destabilization disaster chain theory is initially formed and provides a new theoretical foundation for more effective control of the mine goal stability.