采动底板断层“活化”的解析计算及其工程应用

在材料力学和矿山压力理论的基础上,建立了采动底板断层活化突水的解析力学模型。综合考虑断层面及其附近的受力条件,并结合水压力推导出采动底板断层活化突水的相关公式,得出了在临界突水条件下断层活化突水的水压和开采深度的相关公式,并对该公式相关参数进行了讨论。结合郑州矿区超化煤矿22081工作面断层活化突水实例进行应用,通过计算得出其理论与实际情况是基本吻合的。进而说明该力学模型及其相关公式可以作为采动底板断层活化的判据之一。

Analytic Calculation of Fault Activation in Mining Coal Floor and its Engineering Application

In this paper,the analytic mechanics model of fault activation and water inrush from floor is established base on the material mechanics and theory of coal mine stress.The correlative formulas of water pressure and mining depth for fault activation and water inrush from floor under the critical condition of water-inrush are drawn by comprehensively considering the stress conditions of fault plane and its nearby area and deducing the correlative formulas of fault activation combining water pressure.The relevant parameters of formulas are discussed.Finally,the formulas are used to the analyses of fault activation and water-inrush from floor in the 22081 working face of Chaohua mine in Zhouzheng mining area,the calculated results are approximate with the actual situation,this indicates that the analytic mechanics model and the relevant formulas can be used as one of the criteria fault activation in mining floor.