黏性土采动变形-渗透耦合效应研究

项目名称： 黏性土采动变形-渗透耦合效应研究

项目编号： No.41272343

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 董青红

作者单位： 中国矿业大学

项目金额： 80万元

中文摘要： )：本项目研究覆盖于基岩风化带之上的黏性土隔水段受开采影响的变形渗透耦合规律，对松散层水害预防和水资源保护有重要意义。研究以地质原型调查为基础，考虑多重地质、开采因素，通过实测黏性土和风化带的应力应变等可测信息和特征识别，试验和分析黏性土采动应力、应变、孔隙压力路径与开采对应关系，测试黏性土变形破坏的结构变化、渗透性变化和极限承载水头能力，归纳黏性土变形破坏和渗流耦合特征以及多重因素影响特征。研究将突破以往仅通过宏观结构、厚度决策松散层底界黏性土防止溃水、溃砂作用的模式，定性和定量揭示出黏性土采动变形破坏的结构稳定性和隔水稳定性；揭示若干深层黏性土变形破坏的宏观模式、力学机制以及渗透渗漏的判别依据，获得周期大变形条件下黏性土结构破坏-渗透耦合的规律；提炼影响黏性土变形破坏的地质开采关键因素，建立探查、观测、评价和论证新生界松散层水体下回收浅部资源的关键地质理论和系统化方法。

中文关键词： 黏性土；开采；大变形；渗透；耦合作用

英文摘要： The aquifer in the unconsolidated layers is a threat to shallow buried coal seams mining in central and eastern China. The layer of clay, sandy clay and clayey sand, as a auifuge above the weathering zone of bedrock, at the bottom of the unconslidated layers is a common geological structure in this areas. The deformation, failure and infiltration process of the aquifuge caused by mining is a key conditon for safe minging and water conservation. The study will begin after the survey of geological prototype. On considering multiple geological and mining factors, measurement of stress, strain and other informations that can be recorded in the clay layer and weathered zone, pattern recognition of these informations, the tests and analysis of mining stress, strain, pore pressure path and their relationship with mining, obsevation of the structural changes of the deformed clay and capture of the permeability changes and the ultimate bearing head capacity will be completed gradually in order to induce that the coupling effects among soil deformation, seepage, geological and mining factors. The study works would obtain the qualitative and quantitative regulation about the degree of deformation, failure and permeability of the soil for judging the structural stability and watertight stability. This will replace the origi

英文关键词： cohesive soil；mining；large deformation；penetration；coupling effects