红透山铜矿深部斜坡道围岩发生层裂破坏数值分析

本文围绕红透山矿红透山矿深部-707m水平13#采场斜坡道围岩层裂破坏,通过现场工程地质调查、岩石力学实验、围岩应力分析,对13#采场斜坡道的围岩质量进行分析及岩体力学参数估算；在此基础上,应用FLAC3D分析回采对斜坡道围岩层裂破坏影响,开采矿体围岩在切向应力作用下,岩体微裂纹沿切向应力方向扩展、贯通,形成平行于开挖边界的宏观裂缝；数值分析采动过程斜坡道围岩层裂发生力学机制及其围岩应力场变化规律,数值模拟结果表明,深部斜坡道围岩高应力、采动应力以及爆破震动共同作用造成岩体产生层裂破坏。

Numerical simulation on the spalling of surrounding rock mass of the deep ramp at Hongtoushan Copper Mine

the purpose of this paper is to analyze the spalling of surrounding rock mass of deep ramp in 13# stope of -707m level at Hongtoushan Copper Mine. The field engineering geology investigation, rock mechanics testing and geo-stress analysis were employed to assess the rock mass quality and estimate the parameters of rock mass. On this basic, the FLAC3D was applied to analyze the mechanical mechanism and stress field distribution of surrounding ramp. The initial, propagation and fracture of surrounding rock mass is under tangential stress induced by the different stoping process. The numerical result shows: the spalling of surrounding rockmass is the together combined action under the high in-situ stress, stress induced by mining and blasting vibration condition.