摘要
依托于云南磷化集团晋宁磷矿6#坑深部缓倾斜中厚磷矿地下充填法采矿工程,采用有限元数值模拟的方法,通过折减充填体强度研究了充填体强度变化对围岩及边坡的应力和位移的影响,并且从能量角度对充填体的作用进行阐释。结果表明,充填体强度增大减少系统的能量释放,有效减少地表沉降和顶板变形,改善围岩应力状态,并限制了围岩破坏及裂隙的发展。
The filling mining method was used in the gentle-inclined and medium-thick phosphate layer in No.6 pit of Jinningphosphate mine of Yunnan Phosphate Chemical Group. Based on this project, the finite element numerical simulation was usedto study the influence of filling strength on the stress and displacement of surrounding rock and slope through filling strengthreduction. And the effect of filling mass was explained in terms of the energy. The results showed that increasing the fillingstrength could reduce energy release of the system, surface subsidence and roof deformation, improve stress state of surround-ing rock, as well as limit damage of surrounding rock of and development of crack.
出处
《矿业研究与开发》
北大核心
2017年第9期13-16,共4页
Mining Research and Development
基金
国家科技支撑计划项目(2011BAB08B01)
关键词
充填采矿法
充填体强度
能量
应力位移
Filling mining method, Filling strength, Energy, Stress and displacement
