摘要
采用理论分析、数值计算与现场工业性试验等综合研究手段，基于对残留煤柱内支承应力分布规律的分析，确定了采空区边缘煤体应力降低区的范围为0-5m，通过对不同护巷煤柱宽度下窄煤柱应力分布规律与变形特征的数值分析，合理确定护巷煤柱宽度为4m；并针对性提出沿空掘巷围岩控制对策：高强度高预应力锚杆（索）联合支护；水力膨胀锚杆全长锚固加固窄煤柱帮，确定了试验巷道围岩控制技术与参数，成功应用于现场工业性试验，围岩控制效果显著。
By adopting comprehensive research methods including theoretical analysis, numerical calculation and field industrial test, and based on analysis of distribution law of bearing stress in residual coal pillar, the paper determines the range of stress decreasing zone of coal mass by gob edge is about 0-5m. Through numerical analysis on stress distribution law and deforma- tion characteristics of narrow coal pillar with different roadway width, the reasonable width for roadway-protecting coal pillar is determined as 4m. Meanwhile, control countermeasures for surrounding rock of gob-side entry driving are put forward correspondingly： joint support of high- strength and high pre-stress bolt （cable） ; full-length anchorage of hydraulic expansion bolt for reinforcing narrow coal pillar side. Surrounding rock control technology and parameters for testing roadway are determined and applied in field industrial test successfully. Results show that control effectiveness of surrounding rock is remarkable.
出处
《中国煤炭》
北大核心
2014年第6期62-66,共5页
China Coal
关键词
沿空掘巷
残留煤柱
窄煤柱
控制技术
gob-side entry driving, residual coal pillar, narrow coal pillar, control technology
