银山矿区深部铜铅锌矿地应力测试研究

Ground Stress Test of Deep Copper-Lead-Zinc Mine in Yinshan Mining Area

江西银山铜铅锌矿浅部资源已经开采殆尽,为保证矿山产能,逐渐向深部矿体进行规模回采,将面临深部岩体应力扰动、岩爆等关键难题。为进一步探明银山铜铅锌矿深部岩体应力分布规律,基于水压致裂测量法,结合9个地质钻孔,在银山区、九龙上天区、西山区、北山区和九区5个区域开展地应力测试分析。结果表明,九龙上天区、西山区在深部标高880 m时即进入高应力开采区域,而银山区、北山区和九区在深部标高550 m时即进入高应力开采区域,此时水平地应力明显增高,测压系数可达到1.5。研究结果可为银山铜铅锌矿深部开采岩体应力演化规律提供参考依据。

The shallow resources of Yinshan Copper-Lead-Zinc Mine in Jiangxi Province have been exhausted.In order to ensure the production capacity of the mine,the large-scale mining to the deep ore body will be faced with some key problems such as deep rock stress disturbance and rock burst.In order to further investigate the stress distribution of the deep rock mass of Yinshan Copper-Lead-Zinc Mine,the ground stress analysis was carried out in five areas,including Yinshan district,Jiulongshangtian district,Xishan district,Beishan district and Nine district,based on the hydraulic fracturing measurement method and nine geological boreholes.The results show that Jiulongshangtian district and Xishan district enter the high stress mining area when the deep elevation is 880 m,while Yinshan district,Beishan district and Nine district enter the high stress mining area when the deep elevation is 550 m.At this time,the horizontal ground stress increases obviously and the pressure measurement coefficient can reach 1.5.The research re⁃sults can provide reference for the stress evolution of rock mass in deep mining of Yinshan Copper-Lead-Zinc Mine.