摘要
针对深部巷道围岩在开挖与支护时所表现出的非线性力学过程特性,对锚网索耦合支护时空规律进行数值模拟与工程应用研究。研究结果表明,在巷道实施锚网耦合支护后,在围岩剧烈变形阶段结束或临近结束的时间施加锚索关键部位耦合支护,是实现锚索与锚网和围岩之间时空耦合的最佳二次支护时间,其主要特征是通过锚索调动深部围岩强度实现巷道围岩高应力向低应力的转化;同时,实施锚网索耦合支护的深部回采巷道能够满足巷道掘进与工作面回采期间的稳定性控制要求。
Aiming at the characters of nonlinear mechanical process for surrounding rock in deep gateway excavation and support, the space-time action rule of bolt-net-anchor coupling support is researched by numerical simulation method and engineering application. The result indicates that, after the gateway surrounding rock is reinforced by the bolt-net coupling support, the optimal secondary support time to realize the space-time coupling among anchor, bolt-net and surrounding rock is that when the obvious deformation stage of the surrounding rock is completed or almost completed. Its main character is the transformation from high stress concentration to low stress zone through mobilizing the strength of inner surrounding rock by anchor coupling support. The gateway with bolt-net-anchor coupling support can meet the requirements of the stability control during gateway excavation and coal extraction.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第5期895-900,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展计划(973)项目(2006CB202200)
国家自然科学基金资助项目(50490273
50544009
50221402)
教育部科学技术研究重大项目(10405)
关键词
采矿工程
深部回采巷道
锚网索耦合支护
时空作用规律
数值模拟
mining engineering
deep gateway
bolt-net-anchor coupling support
space-time action role
numerical simulation
作者简介
孙晓明（1970-），男，博士，2002年于中国矿业大学（北京）岩土工程专业获博士学位，现任副教授，主要从事岩土工程和软岩工程力学等方面的教学与研究工作。E-mail：xiaoming_s@263．net
