采动效应下逆断层顶板突水规律相似模拟  

Similarity Simulation of Water-inrush from Reverse Fault Roof Under Mining Effect

作　　者：胡涛[1] 赵德深[1] 

机构地区：[1]大连大学辽宁省复杂结构体系灾害预测与防治重点实验室,辽宁大连116622

出　　处：《煤矿安全》2017年第2期52-55,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51274051)

摘　　要：以大平煤矿N2S3工作面作为相似模拟研究对象,采用相似模拟试验对下盘开采逆断层的活化失稳过程进行研究,分析了工作面推进过程中断层面应力演化特征,探索断层对采区工作面突水的影响规律。研究表明:随着工作面的推进,断层整体呈"上端活化—上端闭合—下端活化"的演化规律,断层上下盘之间相对运动逐渐向其下端发展。当下盘开采工作面位于逆断层附近30 m范围内时,断层带整体活化将导致了采空区突水事故的发生,此时需要通过留设断层防水煤岩柱来达到安全开采的目的。Taking N2S3 working face of Daping Mine as the object of analog simulation, we use simulation test to study the activation and instability of reverse fault during footwall mining, and analyze the stress evolution characteristics of fault plane during the advancing of working face, and explore the influence of fault on water-inrush from working face. The research indicates that the whole evolution law of fault presents ＂activation of upper end, closure of upper end, activation of lower end＂with the advancing of working face; the relative movement of the hanging and foot wall gradually develops to lower end. The whole activation of fault zone will cause water-inrush in mined-out area when the footwall working face is near reverse fault within the scope of 30 m. At this time, it is necessary to set up water-preventing coal pillar in the fault to achieve the purpose of safe mining.

关 键 词：采动效应 逆断层 顶板破坏 突水 相似模拟 应力分析 

分 类 号：TD741[矿业工程—矿井通风与安全]