含断层采场顶板膨胀型浆体注浆加固效果研究  

Study on Reinforcement Effect of Expansive Slurry Grouting at the Fractured Roof Plate of the Mining Field

作　　者：张文豪 姚囝[1,2] 叶义成[1,2] 李鹏程 ZHANG Wenhao;YAO Nan;YE Yicheng;LI Pengcheng(School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallergic Mineral Resource,Wuhan 430081,China;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.,Maanshan 243000,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 [3]中钢集团马鞍山矿山研究总院股份有限公司,安徽马鞍山243000

出　　处：《金属矿山》2023年第6期79-84,共6页Metal Mine

基　　金：国家自然科学基金项目(编号:51804224,51574183);湖北省重点研发计划项目(编号:2020BCA082)。

摘　　要：为研究某矿含断层采场顶板处采用膨胀型浆体注浆加固效果,开展了由膨胀型浆体和普通型浆体注浆加固相似模拟试验,对比分析了不同浆体注浆加固后含断层采场顶板沉降和围岩应力变化情况。研究结果表明:相较于普通型浆体,膨胀型浆体注浆加固含断层采场顶板能够进一步减小顶板沉降及其上下盘围岩应力增量,使加固后的含断层采场顶板稳定性更高;膨胀型浆体通过先挤后黏增加了浆—岩接触面的粘结强度和摩擦强度,提升了复合顶板整体力学强度和承载力,减小了上覆岩层自重应力向矿柱围岩中底部转移;膨胀型浆体产生的膨胀应力分别向上支撑和向下挤压断层两侧岩体,缓解了上覆岩层对上盘岩体矿柱围岩的挤压,略微增大了下盘矿柱的围岩应力。In order to study the reinforcement effect of expansive slurry grouting at the fractured roof plate of the mining field.A similar simulation experiment of slurry reinforcement by expansive slurry and the ordinary slurry was carried out to compare and analyze the roof plate subsidence and the change of surrounding rock stress at the fractured roof plate of the mining field after reinforcement with different slurry.The results show that compared with the ordinary slurry,the expansive slurry grouting can further reduce the roof plate subsidence and the stress increment of the surrounding rock of the hanging wall and footwall,and make the stability of the fractured roof plate of the mining field higher.The expansive slurry increased the bonding effect and friction strength of the slurry-rock interface by squeezing first and then sticking,improved the overall mechanical strength and bearing capacity of the compound roof,and reduced the transfer of self-weight stress of overlying strata to the middle and bottom of mine pillar surrounding rock.The expansion stress generated by expansive slurry supports and compresses the rock mass on both sides of the fracture,which reduced the extrusion of the overlying strata on the surrounding rock of the hanging wall mine pillar and slightly increases the surrounding rock stress of the footwall mine pillar.

关 键 词：含断层顶板 膨胀型浆体 注浆加固 顶板位移 围岩应力 

分 类 号：TD355[矿业工程—矿井建设]