深部巷道钻孔卸压机理与围岩稳定控制研究

项目名称： 深部巷道钻孔卸压机理与围岩稳定控制研究

项目编号： No.51204166

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 冶金与矿业学科

项目作者： 王襄禹

作者单位： 中国矿业大学

项目金额： 25万元

中文摘要： 钻孔卸压具有转移高应力、改善巷道维护状况、施工方便等优点，但该方法的应用会再次扰动、弱化开挖卸荷后的煤岩体结构，巷道（尤其深部巷道）维护难易与卸压程度、支护时机等因素密切相关，合理控制卸压程度、开发相应控制技术是应用钻孔卸压解决深部巷道支护难题的关键。为此，本课题主要开展以下内容研究：（1）研究钻孔卸压煤岩体峰后损伤力学特性，揭示深部钻孔卸压巷道应力场演化特征与强度损伤规律，为研究深部巷道钻孔卸压机理提供依据。（2）分析钻孔卸压对深部巷道围岩稳定的动态作用机理，确定深部巷道合理的钻孔卸压参数和适用条件，揭示深部巷道钻孔卸压机理。（3）建立深部钻孔卸压巷道锚注支护结构的流变-损伤力学模型，揭示钻孔卸压与锚注支护结构相互作用的时效性与稳定控制机理，确定合理卸压程度、相应动态控制技术和时机，为研究深部巷道"围岩钻孔卸压-支护"方法提供依据。

中文关键词： 深部巷道；钻孔卸压；弹塑性变形；流变；稳定控制

英文摘要： Pressure relief of roadway has the advantages of transferring high stress and improvement of roadway conditions. But due to pressure relief being disturbance and damage to the opened coal and rock mass, degree of pressure relief and supporting opportunity and other factors can significantly affect roadway(especially the roadway buried deeply) stability subjected to pressure relief, reasonable control degree of pressure relief and development of the corresponding supporting techology was the key to solve the supporting puzzle of deep roadway used the pressure relief technology.Thence, this project will carry out some researches as follows:(1) based on the coal and rock mass post-peak mechanical behaviors, the evolution characteristics of stress field and strength weakening rules of deep pressure drilling relief roadway will be revealed, which provides the basic idea for studying the mechanism of deep roadway after pressure relieved;(2)by analysing the dynamic mechanism of pressure relief in the deep roadway, the proper drilling relief parameters and applicable conditions will be determined and the pressure relieving mechanism will be revealed;and (3) by establishment rheological-damage mechanics model of supporting structure characterised by bolting and grouting in drilling relief roadway buried deep, the timeli

英文关键词： Deep roadways；Drillhole pressure-releasing；Elastic-plastic deformation；Creep；Stability control