摘要
针对冲击倾向性围岩条件下沿空掘巷的防冲及稳定性控制问题,从应力控制和支护系统设计两方面入手,在分析巷道诱冲因素和变形特征的基础上,提出了冲击倾向性围岩沿空掘巷的防冲控制原理。即合理设计窄煤柱宽度有效降低围岩应力,人为制造软弱夹层释放围岩应力、吸收冲击能,高性能锚杆支护技术体系强化围岩支护小结构强度。现场实践表明,综合采用上述3方面技术措施后,可实现对冲击倾向性围岩条件下沿空掘巷的有效控制,工作面准备及回采期间没有冲击矿压发生,巷道变形满足安全生产要求。
Aimed at controlling the stability of surrounding rocks of roadway driving along goaf in deep coal seam with outburst-proneness, intensity weakening mechanisms were proposed. Including stress controlling, support system designed and technical measured, which included rational design of narrow pillar＇s width and roadway support system, were proposed by analyzing the failure characteristics and influencing factors of the roadway. Studies show that design reasonable narrow pillar＇s width can help reducing stress of surrounding rocks. Creating soft interlayer with external measures can release stress and absorb impact energy, and high-performance bolting system can enhance the strength of surrounding rocks. The integrated approaches can make stability controlling of roadway driving along goaf in deep coal seam with outburst-proneness effectively.
出处
《采矿与安全工程学报》
EI
北大核心
2012年第6期751-756,共6页
Journal of Mining & Safety Engineering
基金
江苏高校优势学科建设工程项目
国家自然科学基金项目(50974118)
教育部新世纪优秀人才支持计划项目(NCET-09-0727)
关键词
冲击矿压
沿空掘巷
防冲控制原理
围岩控制
rock burst driving roadway along goal
controling theory for rock burst
surrounding rock control
