露天转地下开采岩体稳定性三维数值模拟

基金项目:

教育部高等学校博士学科点专项科研基金(No.20040008025)

详细信息

3-D numerical simulation on the stability of rocks in transferred underground mining from open-pit

Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China

摘要: 露天转地下开采围岩应力和工程尺度同时影响着地下工程和露天边坡的稳定性.通过三维数值模拟,揭示了露天边坡内地下开采采场周围和边坡的力学环境,探讨了围岩移动变形、应力分布和破坏机理,分析了边坡稳定性状况.研究表明,在扰动边坡下进行地下开采,坡脚处的局部弧形破坏区将进一步恶化,但不会影响边坡的整体稳定性.由于边坡的卸荷作用,导致采场上覆岩层成拱机制减弱,采空区覆岩存在整体垮冒的可能性.
- 露天转地下开采 /
- 边坡 /
- 稳定性 /
- 三维数值模拟
Abstract: Both the stress environment and the size of underground excavation influence the stability of the mining face and the slope. Numerical analysis of FLAC^3D was used to reveal the stress environment arouiad the excavation in the slope, discuss the strata movement, stress distribution and failure mechanism, and analyze the stability of the slope affected by underground excavation. The results show that local curved failure zones may become worse during underground mining under the disturbed slope, but the stability of the slope as a whole will not be changed. For the unloading effect, the arching mechanism in the roof strata is weakened, and the probability of catastrophic collapse exists in roof strata above the mining zone.
- transferred underground mining from open-pit /
- slope /
- stability /
- 3-D numerical simulation