摘要
随着矿山开采由浅部逐渐转向深部,岩爆等地质灾害问题频发。根据一系列的岩爆预防和控制的相关研究,采用卸压开采可对岩爆易发区进行防控。以夏甸金矿为工程背景,针对夏甸金矿运输巷发生的岩爆现象,提出预先掘进卸压巷道来防控岩爆的方案,基于Flac3D数值模拟软件,模拟分析在巷道两侧实施预掘卸压巷道方案后,巷道围岩应力的分布情况和卸压效果。卸压后,应力集中区域明显减少,两帮的卸压效果最为明显,变形减小量可达17.6%,顶板变形减小量为8.5%。
With mining gradually turning from shallow to the deep,the geological disasters like rock burst frequently occur.According to a series of study on rock burst,its prevention and control,it is shown that pressure relief exploiting can prevent and control the areas prone to rock burst.The paper took Xiadian Gold Mine as the research subject,in light of the rock burst phenomena occurring in the haulage ways,proposed that pressure relief drifts be excavated in advance to prevent and control rock burst.Flac 3D numerical simulation software is used to simulate and ana-lyze the stress distribution status of drift wall rocks and the pressure relief effect.After the pressure is relieved,stress concentration area is greatly diminished with the most prominent pressure relief effect on both sides,of which the diminished deformation magnitude can reach 17.6%.The magnitude for the roof is 8.5%.
作者
周东良
刘玉桥
李占奎
万飞
Zhou Dongliang;Liu Yuqiao;Li Zhankui;Wan Fei(Zhaojin Mining Industry Co.,Ltd.;School of Civil and Resource Engineering,University of Science and Technology Beijing;State Key Laboratory of High-Efficient Mining and Safety of Metal Mines,Ministry of Education,University of Science and Technology Beijing)
出处
《黄金》
CAS
2018年第4期27-30,47,共5页
Gold
关键词
深部开采
岩爆
卸压开采
数值模拟
应力
地压控制
deep mining
rock burst
pressure relief exploiting
numerical simulation
stress
ground pressure control
