摘要
针对冲击倾向性煤岩层条件下沿空掘巷的围岩控制问题,从应力控制和支护系统设计方面入手,提出了沿空掘巷围岩减冲控制原理。分析了冲击倾向条件下沿空掘巷的破坏特征和影响因素,通过合理选取煤柱宽度降低围岩应力、人为制造软弱夹层释放围岩应力吸收冲击能、采用高性能锚杆支护技术体系强化围岩支护小结构强度等综合措施,可实现对冲击煤层沿空巷道的有效控制。
Aiming at the surrounding rock control problem of roadway driving along goaf in coal seam with outburst-proneness, based on the stress controlling and support system designing, the rockburst weakening mechanism is proposed. According to the analysis of the failure characteristics and influencing factors of the roadway driving along goal in the seam with out- burst-proneness, the comprehensive measures are adopted including designing reasonably pillar＇s width to reduce surrounding rock stress, creating soft interlayer to release wall rock stress and absorb impact energy, and using high-performance bolting support technology system to enhance the strength of surrounding rock support structure, which can realize the effective control on the roadway driving along goaf in coal seam with outburst-proneness.
出处
《中国煤炭》
北大核心
2012年第9期32-35,共4页
China Coal
关键词
冲击矿压
沿空掘巷
围岩强度弱化
围岩控制
rock burst, roadway driving along goal, surrounding rock intensity weakening, surrounding rock control
