断层滞后型突水渗-流转化机制及数值模拟研究  

The seepage-flowing conversion mechanism of the fault lagging water inrush and its numerical simulation

作　　者：李海燕[1] 张红军[1] 李术才[1] 刘人太[1] 郑卓[1] 白继文[1] 

机构地区：[1]山东大学岩土与结构工程中心,山东济南250061

出　　处：《采矿与安全工程学报》2017年第2期323-329,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51379114)

摘　　要：在系统研究王楼煤矿13301采煤工作面断层滞后突水特征的基础上,对断层滞后突水渗-流转化机制进行了深入分析,提出了"开采扰动-渗透弱化"双阶段理论模型,并进一步将断层渗透弱化阶段分解为非饱和渗流阶段、低速稳定饱渗流阶段以及快速饱和渗流阶段3个阶段;基于突水过程的流态变化的普遍特征,分别通过理查德方程、达西定律以及布里克曼方程建立了各阶段的数学物理模型;建立了煤层工作面回采有限元模型,实现了对断层组内部地下水由非饱和到饱和、由低速流动到快速流动、断层组渗透性由弱到强的过程的完整描述,其涌水量计算结果与实际基本吻合。On the basis of systematic study of the characteristics of fault lagging water inrush in the mining face 13301 of Wanglou coal mine, its seepage-flowing conversion mechanism was deeply ana- lyzed. Then the double-stage theory model of ＂mining disturbance-penetration weakened＂ is put forward. The stage of the fault permeability weakening is further divided into three stages： unsaturated seepage stage, slow and stable full seepage stage, and fast saturated seepage stage. Based on the com- mon characteristics of flow pattern changes in the process of water inrush, the mathematical and physi- cal model of each stage was established through Richard equation, Darcy＇s law, and Brickman equation respectively. Then finite element model for the coal mining faces was established, which realized the complete description of the process for the internal groundwater flow in the fault group from unsatu- rated to saturated, from slow to fast in water flow speed, from weak to strong in permeability. The water inflow amount calculated through the model basically tallies with the reality.

关 键 词：采动影响 断层 滞后突水 渗-流转化 数值模拟 

分 类 号：TD745[矿业工程—矿井通风与安全]