煤层底板突水灾害演化规律研究

项目名称： 煤层底板突水灾害演化规律研究

项目编号： No.50874103

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 王连国

作者单位： 中国矿业大学

项目金额： 36万元

中文摘要： 我国承压水上的煤层开采，量大面广，且已发生多起突水事故，不仅经济损失巨大，而且破坏了矿区生态环境，具有严重的社会危害。随着矿井开采向深部延伸，采动应力和水压越来越大，由采动诱发煤层底板突水这类动力灾害的可能性亦越来越大，严重影响矿井安全生产和企业的经济效益，煤层底板突水问题已是当前我国煤炭开采亟待解决的重大课题。本课题基于大量实测信息，在深入开展采动应力转移和分布规律系统分析的基础上，将岩层控制的关键层理论、采动岩体渗流理论与非线性科学的突变理论相结合，研究了煤层底板突水灾害演化规律，揭示了底板隔水层采动裂隙生成、贯通与导水通道形成规律，并结合仪器监测，分析了底板突水形成的灾变条件，建立了底板突水预测预报模型，对承压水上煤层开采安全性进行科学的评价，为我国承压水上煤层开采提供理论依据及技术途径，从而推动我国绿色采矿技术的发展。

中文关键词： 采动应力；裂隙扩展；渗流；突水灾害；演化规律

英文摘要： In china, many coal seams are extracted above the confined water, and many water-inrush accidents have happened, not only giving rise to great economic losses but also destroying ecological environment, with great harm. With mining depth increasing, mining induced pressure and water pressure become higher and higher. Then, dynamic disasters are easy to occur, such as water-inrush from coal floor induced by coal mining, affecting safety operation and giving rise to great economic losses seriously. So, water-inrush from coal floor has become a great subject that needed to be solved urgently.Based on lots of measured information and systematical analysis on transferring and distribution of mining induced pressure, the evolution rule of water-inrush from coal floor, generation and transfixion of mining-induced fracture in water-resisting floor key strata, and formation rule of underground watercourse had been studied, by using key strata theory in ground control, percolation theory of mined rock mass, and catastrophe theory in nonlinear science.In addition, with instrument monitoring system, the catastrophe conditions of water-inrush from coal floor had been analyzed, and the prediction model had been built for it, then, the safety of mining above confined water had been evaluated scientifically, the theoretical basis and technical approach were provided for mining above confined water and the technology of green mining will be developing.

英文关键词： mine-induced stress；cracks propagation； seepage； water-inrush disaster；evolution rule