急倾斜层状岩体巷道顶板膨胀型浆体注浆支护效果研究  

Research on the Effect of Expansive Slurry Grouting Support for Roadway Roof in Steeply Inclined Layered Rock Mass

作　　者：叶义成[1,2] 刘一鸣 姚囝[1,2] 邓兴敏 YE Yicheng;LIU Yiming;YAO Nan;DENG Xingmin(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081

出　　处：《金属矿山》2022年第3期57-64,共8页Metal Mine

基　　金：国家自然科学基金项目(编号:51804224);湖北省重点研发计划项目(编号:2020BCA082)。

摘　　要：为分析急倾斜层状岩体巷道顶板注浆后的支护效果,采用ABAQUS软件分别建立其顶板层理面普通型浆体注浆和膨胀型浆体注浆加固以及未注浆的数值分析模型,对比分析了不同注浆条件下巷道顶板的位移、应力与塑性应变的变化特征。开展了急倾斜层状岩体巷道顶板注浆相似模拟试验,在相似模型中设置了与数值模拟对应的位移与应力监测点,对比分析了普通型浆体注浆和膨胀型浆体注浆后的顶板位移及应力变化特征,并结合相似模拟试验现象分析了膨胀型浆体的注浆加固机理。研究表明:普通型浆体注浆和膨胀型浆体注浆条件下的顶板垂直位移较未注浆分别平均减少了19.7%和30.2%,膨胀型浆体注浆较普通型浆体注浆的垂直应力平均降低了18.4%。相似模拟试验中,巷道顶板位移及内部应力变化规律与数值模拟相吻合,膨胀型浆体注浆后的顶板承载能力和抵抗变形能力更强,加载后较普通型注浆下的顶板位移与应力更小。研究结果进一步表明,膨胀型浆体对于急倾斜层状岩体巷道顶板注浆加固具有良好的支护效果。In order to analyze the effect of slurry grouting support for roadway roof in steeply inclined layered rock mass,ABAQUS software was used to establish the numerical analysis models of regular slurry grouting,expansive slurry grouting reinforcement and non-grouting of the roof bedding surface.The variation characteristics of the displacement,stress and plastic strain of roadway roof under different grouting conditions were compared and analyzed.The similarity simulation test of roof grouting in steep layered rock roadway was carried out,displacement and stress monitoring points corresponding to numerical simulation were set in the similar test model,the variation characteristics of roof displacement and stress after regular slurry grouting and expansive slurry grouting were compared and analyzed.Combined with similar simulation test phenomenon,the grouting reinforcement mechanism of expansive slurry was analyzed.The results showed that the vertical displacement of roof under the conditions of regular grouting and expansive grouting was reduced by an average of 19.7%and 30.2%respectively compared with non-grouting,and the vertical stress was 18.4%lower than that of regular slurry grouting on average.In the similar simulation test,the variation law of roof displacement and internal stress was consistent with the numerical simulation.The bearing capacity and deformation resistance of the roof after expansive slurry grouting were stronger,and the displacement and stress of the roof after loading were smaller than those under regular grouting.The study results further indicated that the expansive slurry had a good support effect for the roof grouting reinforcement of roadway in steeply inclined layered rock mass.

关 键 词：急倾斜岩层 膨胀型浆体注浆 巷道围岩 应力分布 顶板位移 

分 类 号：TD353[矿业工程—矿井建设]