深井大断面沿空掘巷围岩支护技术研究  

Technology of Supporting Roadway Driven along Gob with Large-section in Deep Mine

作　　者：樊克恭[1] 马池帅 王亚军[1] 甄恩泽 满建鑫 

机构地区：[1]山东科技大学矿山灾害预防与控制实验室,山东青岛266590

出　　处：《煤矿开采》2015年第2期43-46,共4页Coal Mining Technology

基　　金：国家自然科学基金青年科学基金项目(51104093)

摘　　要：针对湖西矿深井厚煤层大断面沿空掘巷出现的两帮整体外鼓、底鼓严重等问题,在现场调研、数值模拟的基础上,认为原岩应力高、巷道两帮岩性差、支护结构及参数不合理等是导致巷道变形破坏的主要原因,且小煤柱是整个沿空掘巷保持稳定的关键。据此针对深井厚煤层大断面沿空掘巷围岩结构特点,提出了"高强预应力让压锚杆+补强鸟巢锚索"联合支护方案,经现场监测发现,该支护方案有效地控制了沿空巷道围岩的变形,解决了原支护需多次扩帮、卧底的难题,确保了工作面正常生产。In order to solve the problem of severe floor heave and two-side whole deformation in roadway driven along gob in thick coal- seam in deep mine of Huxi Colliery, applying site survey and numerical simulation, it was believed that high geo-stress, bad lithology and unreasonable supporting structure and parameters were main reasons which resulted into roadway deformation and failure and the small coal-pillar was the key to keeping roadway stability. On the basis of surrounding rock structure characteristic, combined support- ing projection of ＂high pre-stress yielding anchored bolt ＋ reinforcement bird-nest anchored cable＂ was put forward. Site observation showed that this supporting projection could effectively control deformation of roadway driven along gob and solved the difficult problem of supporting.

关 键 词：深井 大断面 沿空巷道 联合让抗支护 

分 类 号：TD353[矿业工程—矿井建设]