陈耳金矿原岩应力测量及分布规律模拟研究

原岩应力是影响地下采矿工程稳定性的重要因素之一,是地下工程变形和破坏的根本作用力。针对陈耳金矿18坑1532盲竖井埋深超过1 000 m,井下各中段在进行巷道开挖过程中出现的岩爆现象,采用套孔应力解除法对井下6个测点进行原岩应力测量,获得了井下主原岩应力的大小及方向。分析了原岩应力分布的规律并采用Flac^3D数值模拟软件,模拟分析了陈耳金矿井下巷道在开挖过程中应力分布情况。结果表明,垂直最大主应力开挖时,巷道两帮的应力是沿最大主应力方向的2倍。为陈耳金矿井下巷道及采场布置、支护设计和动力灾害防治提供了科学依据。

Simulation of original rock stress measurement and distribution laws in Chener Gold Mine

The original rock stress is a key factor influencing the mining stability in underground mines and the fundamental force of underground deformation and damage.The burial depth of Blind Vertical Shaft 1532,Pit 18 of Chener Gold Mine is over 1 000 m and there is rock burst on each level deep underground in the excavation of roadways.In light of that,6 underground measuring points by means of the stress relief method of casing hole and the magnitude and direction of the stress of underground main original rock are obtained.The paper analyzes the distribution law and uses Flac^3D numerical simulation software to simulate and analyze the stress distribution status in the underground roadways of Chener Gold Mine in the process of mining.The results show that the stress on both sides when the excavation is perpendicular to the maximum main stress doubles that when the excavation is along the maximum main stress.The paper provides scientific basis for the layout,support design and dynamic disasters prevention of the underground roadways and stopes.