摘要
通过对马路坪矿740m水泵房断面收敛全过程观测和岩孔多点位移观测结果分析,发现加固后的破碎围岩位移存在着方向变异性、破坏周期性和速度变化的差异性,变形过程可分为急剧变形、调整变形和缓慢变形3个阶段.得出:岩体在调整变形阶段可能改变位移方向,岩石破坏呈现周期性,洞室边墙上部比边墙脚位移大;注浆加固后的岩层比未加固岩层的位移小,破坏周期短;洞室的收敛只是表层一定厚度的围岩位移的外在表现,收敛层外岩体向山体方向移动;加固破碎围岩的关键技术是按照工程所处应力场,充分考虑加固层周围地质构造影响,设计加固层的厚度和加固闭合拱.
This paper states that the displacement of the reinforced cracked wall rock has variability in direction, periodicity of destroy and otherness of velocity variety according to the whole process observation of convergence of the water pump room section of 740 m of maluping mine and the observation result analysis of rock hole poly-point displacement. The process of distortion can be divided into three phases, i.e., sharp distortion, regulative distortion and slow distortion. The results show that the displacement of rock body may change direction in regulative distortion phase, the displacement presents periodicity according to the storing and the destroy of the energy of rock distortion, the quantity of displacement of the top is more than that of the bottom, the quantity of displacement and the destroy periodicity of the reinforced terrane infused plasm are less than that of the irreinforced terrane infused plasm, the convergence of bordroom is the displacement of certain thickness wall rock of surface layer. The key technique is to consider fully the effect of faultage construct and to design the thickness of reinforced terrane and the form of closed shells according to the stress field.
出处
《中南工业大学学报》
CSCD
北大核心
2003年第3期311-314,共4页
Journal of Central South University of Technology(Natural Science)
关键词
地下工程
破碎岩石
位移
underground project
crushing wall rock
displacement
