基于基岩风化带裂隙损伤演化与渗流规律的高承压厚松散层突水机理研究

项目名称： 基于基岩风化带裂隙损伤演化与渗流规律的高承压厚松散层突水机理研究

项目编号： No.41472235

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 地质学

项目作者： 胡友彪

作者单位： 安徽理工大学

项目金额： 90万元

中文摘要： 我国华北型煤田新生界松散层底部富水性较强的含水层，直接赋存在煤系基岩顶部，若松散层覆盖厚度较大，该含水层水往往具有很高的承压性。近年来，高水压松散含水层下采煤引起的突水灾害，严重威胁煤矿安全生产。突水时常伴随有顶板压力显现异常增大甚至将综采支架压死，此类灾害不仅与高承压松散层的水文地质条件有关，还与松散层与煤层之间的岩层的工程地质条件、覆岩结构有关，并与采动过程中岩层破断运动特征紧密相关。有充分证据表明松散层下基岩风化带原生裂隙的发育及水文工程地质特征对于高水压松散含水层压架突水有着重要的影响作用。课题拟通过松散层水文地质、工程地质条件分析、采动条件下影响覆岩运动和破坏规律研究。并将突水水文地质、工程地质条件与基岩风化带原生裂隙的发育规律、采动条件下原生裂隙的损伤演化、裂隙带渗流特征覆岩运动和破坏性规律相结合，采用模拟实验、理论研究和现场实测，将揭示高水压厚松散含水层下开采突水机理。

中文关键词： 基岩风化带；裂隙损伤演化；渗流；高承压松散层；突水

英文摘要： Aquifer of strong water abundance in the bottom of cenozoic loose bed in the North China type coalfields,are directly occurrence at the top of the bedrock,it tends to have very high pressure if the cover thickness of loose bed is large.In recent years,water inrush disasters caused by coal mining under the loose aquifer of high water pressure,seriously threatens the coal mine safety production.Water inrush is often accompanied by abnormal enlargement of the roof pressure behavior,even crush the fully mechanized mining support,such disasters not only related to the hydrogeological conditions of high pressure loose bed ,but also the engineering geological conditions,the structure of overlying strata between the loose bed and coal seam,and it is closely related to the characteristics of rock fracture movement in the mining process.There is sufficient evidence to show that the primary fissure of bedrock weathering zone under loose bed and the hydrological and engineering geological characteristics play an important role in the pressure frame of water inrush under the loose aquifer of high water pressure.This article through analying the hydrogeology and engineering geological conditions of the loose bed,studying the movement of overlying strata and the failure law under the influence of mining conditions.And combining the water inrush hydrogeology and engineering geological conditions with the rule of the primary fissure of bedrock weathering zone under loose bed, damage evolution of the primary fissure under the mining conditions,fissure zone seepage characteristics and the movement of overlying strata and the failure law,using the simulation experiment,theoretical research and field test,will reveal the mining water inrush mechanism under the loose aquifer of high water pressure.

英文关键词： bedrock weathering zone;cracks damage evolution;seepage;thick unconsolidated layers with high pressure;water bursting