深井软岩巷道顶帮强力适时锚注支护技术研究  

Research on Strong Strength and Timely Anchoring and Grouting Support Technology for Deep Well Soft Rock Roadway Roof Side

作　　者：赵复翔 张浩文 陈新明[2] Zhao Fuxiang;Zhang Haowen;Chen Xinming(Henan Energy Coking Coal Group,Henan Jiaozuo 454000;School of Civil Engineering,Henan Polytechnic University,Henan Jiaozuo 454000)

机构地区：[1]河南能源焦煤集团,河南焦作454000 [2]河南理工大学土木工程学院,河南焦作454000

出　　处：《山东煤炭科技》2024年第1期6-10,15,21,共7页Shandong Coal Science and Technology

基　　金：国家自然科学基金项目(51834001,52104129);河南省科技攻关项目(212102310107,212102310602)。

摘　　要：为解决软岩巷道支护锚杆受强剪破坏及锈蚀问题,提出以全长锚固为基础的顶帮强力适时锚注支护技术,在原有支护结构上设计了顶帮补强锚索支护技术。结合适时注浆理论和现场测量数据通过Maple计算出最佳注浆时间,采用数值模拟方法研究对比了端头锚固支护与全长锚固支护情况下的巷道围岩位移、应力及塑性区分布。结果表明,以全长锚固为基础的全断面支护技术能够有效控制顶板下沉,采用全长锚固的锚杆能够在有效防止腐蚀的情况下抵抗强剪破坏,最佳注浆时间为巷道开挖后的10~20 d。结合现场监测结果表明,在顶帮强力适时锚注支护下,整体矿压及顶板下沉量基本稳定,锚杆主动支护效果好。To solve the problems of strong shear failure and corrosion of support anchor rod in soft rock roadway,a roof side strong power and timely anchoring and grouting support technology based on full length anchoring is proposed,and the roof side strength reinforcement anchor cable support technology is designed on the original support structure.By combining the theory of timely grouting and on-site measurement data,the optimal grouting time is calculated by using Maple.Numerical simulation method is used to study and compare the displacement,stress,and plastic zone distribution of the surrounding rock of the roadway under the situations of end anchoring support and full length anchoring support.The result shows that the full section support technology based on full length anchoring can effectively control the subsidence of the roof,and the anchor rods that with the use of full length anchoring can resist strong shear failure under the situation of effectively preventing corrosion.The optimal grouting time is 10-20 days after roadway excavation.Based on the on-site monitoring result,it shows that under the strong power and timely anchoring and grouting support of the roof side,the overall mine pressure and roof subsidence amount are basically stable,and the active support effect of anchor rods is good.

关 键 词：全长锚固 全断面支护 数值模拟 适时注浆理论 

分 类 号：TD353[矿业工程—矿井建设]