摘要
基于付村煤矿工程实践,采用大变形数值模拟对矿区3上402采场刷帮区的支护方案进行了优化设计。结果表明:采用预应力锚杆(索)综合加固方案能有效地抑制顶板变形,增加巷道围岩稳定性,保证工程安全;而在原巷道支护设计基础上,顶部补充锚索加固后再进行巷道刷帮,边帮位移可降低3 cm,锚索加固效果明显;补强支护方案下,刷帮引起的煤岩塑性区范围降小,塑性区在煤层中深度约5 m。根据开采强动压实际情况,将普通锚杆替换为让压锚杆后应用于实际工程,对支护效果进行了验证,监测数据表明补强支护设计合理有效。
Based on the engineering practice in Fucun Coal Mine,we carry out optimization design for the supporting scheme in 3 upper 402 mining area brushing area by large deformation numerical simulation.The result shows that the comprehensive scheme of pre-stressed anchor / bolt can inhibit the roof deformation,increase the stability of surrounding rock and ensure project safety.On the base of original tunnel supporting system,if some anchor reinforcement is added on the top of the tunnel,the displacement caused by the brushing can be decreased 3 cm,at the same time,the plastic zone located in the coal layer is only about 5 m caused by the brushing than former design.The monitoring data meet the numerical results well after the proposed supporting design was applied in the real project.
出处
《煤矿安全》
CAS
北大核心
2015年第2期186-189,共4页
Safety in Coal Mines
基金
国家自然科学基金青年基金资助项目(51309089)
江苏省基础研究计划(自然科学基金)资助项目(BK20130846)
关键词
煤矿安全
煤岩
煤巷刷帮
支护体系
数值模拟
coal mine safety
coal
brushing coal roadway
supporting system
numerical simulation
