深部巷道线性锚索束与立体注浆综合加固技术  

Comprehensive reinforcement technology of linear anchor cable bundle andthree-dimensional grouting in deep roadway

作　　者：方恩才 杨永刚[2] 杨张杰[2] 王雷斌[3] FANG En-cai;YANG Yong-gang;YANG Zhang-jie;WANG Lei-bin(National Institute of Engineering and Technology for Coal Mining,Huaihe Energy Holding Group,Huainan 232001,China;Center of Coal Mine Support,AnHui Coal Mining Research Institute,HeFei 230001,China;Dingji Coal Mine,Huaihu Coal and Electric Power Co.,Ltd.,Huainan 232141,China)

机构地区：[1]淮河能源控股集团煤炭开采国家工程技术研究院,安徽淮南232001 [2]安徽省煤炭科学研究院矿山支护技术中心,安徽合肥230001 [3]淮沪煤电有限公司丁集煤矿,安徽淮南232141

出　　处：《煤炭科技》2022年第3期104-108,113,共6页Coal Science & Technology Magazine

基　　金：安徽省重点研究与开发计划资助项目(1804a0802210)。

摘　　要：通过分析锚索破断形式及原因,指出锚索在自由段的软剪切和孔口段的硬剪切是锚索破断失效的主要形式。在此基础上提出了线性锚索束与轮次立体注浆围岩重构综合加固技术。应用简支梁理论计算了线性锚索束外锚组合梁的承载性能。结果表明,该组合梁承载能力较常用14号槽钢提高12倍以上,有利于避免外锚构件屈服变形导致的锚索硬剪切破坏,同时对线性锚索束支护作用机理进行了阐释。利用长、短高强中空注浆锚杆、线性锚索束预留的中空注浆锚索实现了巷道浅部及深部围岩轮次立体注浆,进而重构破碎围岩。工程应用结果表明,线性锚索束与轮次立体注浆围岩重构综合加固技术能够有效控制深部大变形巷道围岩变形,是一种科学有效的支护形式。By analyzing the failure forms and reasons of the anchor cable,it was pointed out that the soft shearing of the anchor cable in the free section and the hard shearing of the orifice section were the main forms of the failure of the anchor cable.On this basis,a comprehensive reinforcement technology of linear anchor cable bundle and three-dimensional grouting surrounding rock reconstruction was proposed.The load-carrying performance of linear anchor-cable bundle external-anchor composite beams was calculated by simply supported beam theory.The results showed that the composite beam was more than 12 times higher than the commonly used No.14 channel steel,which was beneficial to avoid the hard shear failure of the anchor cable caused by the yield deformation of the outer anchor member.At the same time,the mechanism of the linear anchor cable bundle support was explained.Using long and short high-strength hollow grouting bolts and hollow grouting anchor cables reserved by linear anchor cable bundles,rounds of three-dimensional grouting of surrounding rock in the shallow and deep parts of the roadway were realized,and then the broken surrounding rock was reconstructed.The engineering application results showed that the comprehensive reinforcement technology of linear anchor cable bundle and three-dimensional grouting surrounding rock reconstruction could effectively control the deformation of the surrounding rock in the deep large deformation roadway,and it was a scientific and effective form of support.

关 键 词：锚索破断 锚索束 围岩控制 轮次注浆 钻孔窥视 

分 类 号：TD353[矿业工程—矿井建设]