深井复合顶板回采巷道支护技术研究  

Study on complex roof support technology of mining gateway in deep mine

作　　者：常聚才[1] 

机构地区：[1]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《煤炭科学技术》2016年第6期60-63,77,共5页Coal Science and Technology

基　　金：国家自然科学基金资助项目(51204006);安徽省高校拔尖人才资助项目(2014ZY284);安徽省自然科学基金资助项目(1508085JGD08)

摘　　要：为解决深井复合顶板回采巷道难以支护的问题,以谢一矿4671B4工作面-600 m水平回风巷为研究背景,分析了深井大断面复合顶板回采巷道围岩变形破坏特点,认为受高地应力和回采动压影响,各层顶板极易发生离层,且高帮变形影响顶板的稳定,由此提出了高强全长树脂锚固预应力锚杆支护系统控制对策,同时配用自行设计的低稠度树脂锚固剂,实现了树脂全长锚固,结合自制的光纤光栅测力锚杆,分析了巷道掘进过程中树脂全长锚固锚杆受力特征。工程实践表明,全长锚固锚杆沿锚杆全长均产生较强的黏聚力,能有效控制复合层状顶板的离层变形,保持巷道围岩稳定。In order to solve the difficult support problems of the mining gateway with the complex roof in a deep mine shaft,based on the600 m level air returning gateway in No. 4671B4 coal mining face of Xieyi Mine as a study background,the paper had an analysis on the deformation failure features of the surrounding rocks along the large cross section mining gateway with the complex roof in the deep mine.With the influences of the high ground stress and mining dynamic pressure,each roof would easily cause the bed separation and the high sidewall deformation would influence the stability of the roof. Therefore,a control countermeasure of the high strength and full length resin pre- stress bolt support system was provided and the self designed low density resin anchoring cartridge applied. A resin full length anchoring was realized. In combination with the self made optical fiber and optical grating dynamometry bolt,the stress features of the resin full length anchoring bolt were analyzed during the heading process of the mining gateway. The engineering practices showed that the full length of the full anchoring resin bolt could cause a strong adhesion force,could effectively control the bed separation deformation of the complex roof and could keep the stability of the surrounding rocks along the mining gateway.

关 键 词：复合顶板 回采巷道 树脂全长锚固 光纤光栅 深井 

分 类 号：TD323[矿业工程—矿井建设]