膨胀岩变形机理与注浆强化技术  

Deformation Mechanism of Swelling Rock and Its Grouting Reinforcement Techniques

作　　者：李国富[1] 戴铁丁[1] 吕芳礼[1] 杨捷[1] 

机构地区：[1]徐州工程学院土木工程学院,江苏徐州221008

出　　处：《采矿与安全工程学报》2007年第4期444-448,共5页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50774078);江苏省科技厅项目(BS2005614)

摘　　要：采用膨胀岩微观吸水及水理特征试验、浸水前后应力-应变关系与变形模量力学试验,分析膨胀岩微观水理作用特征,通过围岩本构关系理论分析,研究膨胀岩巷道受工程应力引起的变形、扩容、膨胀现象.研究结果表明:黏土矿物比表面积数值巨大,在水理作用下形成强结合水层,是引起围岩吸水膨胀的主要原因;巷道受工程应力引起的岩体破坏、扩容、膨胀是巷道持续变形的主要原因.研制了降低黏粒扩散水层厚度的"施工水"进行施工,并提出了控制"围岩吸水膨胀"和注浆围岩强化控制"应力扩容膨胀"对策方法.研究成果可以控制巷道的强烈变形,保证巷道的稳定,具有显著的技术经济效益.The micro-characteristic of water adsorption and the hydrological property of swelling rocks were tested, and the stress-strain relation and deformation modulus before and after water immersion measured. The deformation and dilation, caused by engineering stress, of the swelling rocks were analyzed by using the constitutive relation theory. The results show that the large specific surface area of clay minerals and the combined diffusing water layer and its thickness formed by microcosmic hydrological action are the major causes for water adsorption and swelling of the surrounding rocks while the failure and dilation of surrounding rocks are the major causes for continuous deformation the roadway. The so-called ＂construction-water＂ was prepared to reduce the thickness of diffusing water layer on clay particles. On the basis of this, some countermeasures to control the water-adsorption-caused-surrounding-rock-swelling and the engineering-stress-caused-surrounding-rock-swelling were proposed, which can control the serious deformation of roadway and guarantee the stability of roadway.

关 键 词：膨胀岩 注浆加固 控制原理 对策 

分 类 号：TD313[矿业工程—矿井建设]