摘要
为研究锚固支护条件下深部巷道围岩是否产生分区破裂以及岩锚支护对分区破裂的影响,以淮南矿区丁集煤矿深部巷道为工程背景,进行了锚固支护条件下高地应力深部巷道开挖三维地质力学模型试验。通过模型试验发现围岩应变呈现波浪形变化规律以及洞周锚杆受力出现拉压交替变化现象。通过与未加锚支护模型试验结果的对比,揭示锚杆对抑制巷道围岩分区破裂具有重要的作用,这为深入分析深部巷道开挖锚固特性和优化深部巷道支护设计奠定了坚实的试验基础。
Whether the phenomena appear in the supporting condition of deep tunnels and how great the role of anchoring mechanism is have not been studied. A3-D model test of the anchor supporting condition for deep tunnels under high ground stress was carried out, with the background being the DINGJI coal mine in HUAINAN mine area. In the process of tunnel excavation, the wave variations of strain in the rock mass were obtained, and the phenomenon of alternating tension and compression in the anchor was observed. Comparing the result with the model without anchorage, it is revealed that the anchorage plays an important role in restraining the zonal disintegration phenomenon which lays a solid test foundation for revealing the impact of anchor on the deep tunnel and improving the design of supporting method in deep tunnel.
出处
《土木工程学报》
EI
CSCD
北大核心
2011年第9期107-113,共7页
China Civil Engineering Journal
基金
国家自然科学基金(40772173)
国家重点基础研究发展计划(2009CB724607)
教育部新世纪优秀人才支持计划(NCET-08-0336)
山东省自然科学基金(Y2007F52)
关键词
高地应力
深部巷道
分区破裂
锚固特性
地质力学模型试验
high geostress
deep tunnel
zonal disintegration
anchorage character
geomechanics model test
