重复采动影响下采场底板隔水层裂隙演化规律试验研究  

Experimental research on fracture evolution law of water-resisting in coal seam floor during re-mining

作　　者：付宝杰[1] 涂敏[1] 

机构地区：[1]安徽理工大学能源与安全学院,煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《采矿与安全工程学报》2015年第1期54-58,共5页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51074004,51174002);安徽省科技攻关计划项目(11010401015)

摘　　要：我国华北型矿区均受石炭二叠纪煤系底部的太灰、奥灰强含水层影响。为分析带压开采过程中,受采动应力及水压双重作用下,煤层底板隔水层承载变形特征及其破坏机理,设计了承压水自动加载系统,通过物理模拟试验再现底板隔水层重复采动影响下裂隙萌生、扩展、贯通等破坏失稳过程。明确底板不同层位的裂隙分布及其形成机理,并通过全场位移监测系统得出底板岩层移动变形规律及位移分区特征。North China mining area is affected by limestone water of Taiyuan formation and Ordovician at the bottom of the Permian coal series permo carboniferous coal. In order to analyze the load-transfer characteristics and failure mechanism of the water-resisting floor in response to the dual function of mine-induced stress and water pressure, confined water automatic loading system has been designed, and the failure process of the floor aquifuge fracture initiation, expansion and transfixion has been showed through physical simulation during re-mining. Thus, fracture distribution characteristics and formation mechanism have been presented at the different layers of floor, and through the displacement measurement system, the deformation rules and district characteristics have been drawn.

关 键 词：重复采动 底板隔水层 物理模拟 裂隙演化 力学机制 

分 类 号：TD163[矿业工程—矿山地质测量]