综放面近距离跨采下山分区加固技术  

Close quarters overhead mining diphead sub area reinforcement technique in top-caving mining coalface and its application

作　　者：王红胜[1] 张东升[1] 王旭锋[1] 范钢伟[1] 陈涛[1] 

机构地区：[1]中国矿业大学能源与安全工程学院

出　　处：《西安科技大学学报》2007年第4期559-564,共6页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金资助项目(50374065);教育部"新世纪优秀人才支持计划"项目(NCET-05-0408)

摘　　要：底板巷道围岩加固是近距离跨采应研究的一个关键技术。文中针对龙固煤矿7201工作面赋存特点,根据跨采采动应力对下山影响范围,提出了对跨采下山以小孔径锚索进行"分区加固"的方案。采用非线性数值分析软件UDEC,系统地分析了跨采下山围岩变形机理及支护物应力、应变变化特征。对加固区域巷道围岩收敛进行的观测表明,当工作面与下山垂距为10 m时是巷道水平应力变化的敏感区,以此作为"分区加固"的指标是合理的,加固效果明显,可为类似条件提供参考。The chief aim of the present work is to investigate the rational surrounding rock reinforcement of roadway in floor. This paper aims at the characteristics of the No. 7201 coalface in Longgu Mine, based on the overhead mining stress influence range, the authors put forward a scheme, which is called sub area reinforcement using small aperture anchor. Nonlinear numerical analysis software, UDEC （Universal Distinct Element Code） is applied to analyze the surrounding rock distortion mechanism and the supports stress-strain features on overhead mining diphead. The observation of reinforcement area surrounding rock constringency shows that the horizontal stress is hypersensitive when the vertical height between the coalface and diphead is about 10 m, taking this height as an index is rational and the reinforcing effect is prominent. The reinforcing scheme can be referenced in similar conditions.

关 键 词：近距离跨采 分区加固 数值分析 锚杆支护 

分 类 号：TD82[矿业工程—煤矿开采]