基于应力场干预的深立井围岩稳定性控制方法研究  

Study on Stability Control Method of Surrounding Rock of Deep Shaft Based on Stress Field Intervention

作　　者：丁金刚[1] 汪小东[1] DING Jingang;WANG Xiaodong(CINF Engineering Co.,Ltd,Changsha,Hunan 410019,China)

机构地区：[1]长沙有色冶金设计研究院有限公司,湖南长沙410019

出　　处：《矿业研究与开发》2020年第9期39-43,共5页Mining Research and Development

基　　金：国家重点研发计划项目(2016YFC0801605)。

摘　　要：随着浅部矿产资源的枯竭,我国矿山立井逐步进入1 500~2 000m深度范围,针对深立井围岩稳定性问题,以国内某高应力围岩深立井工程为背景,通过比较多种围岩应力场干预方案的井壁维护效果和围岩应力场分布特征,得出在围岩主应力方向环向开槽的方案井壁内外缘应力峰值分别降低23.16%和19.33%,井壁极值应力的不均衡系数Kσ由3.42降低至1.80,井壁各处应力、位移分布更均匀,并进一步探索了实现此围岩应力场干预方法的工程措施。相对于常规思路的加厚井壁、采用高标号混凝土等技术措施,合理的应力场干预方案为应对深立井的不均衡高地应力环境提供了另一种解决思路。With the depletion of shallow mineral resources,mine shafts are gradually entering the depth range of 1 500~2 000 m in China.According to the stability of surrounding rock in deep shaft,a domestic deep shaft project with high stress surrounding rock was taken as the background.By comparing the maintenance effects of various surrounding rock stress field intervention schemes and the distribution characteristics of surrounding rock stress field,it is concluded that the peak stress at the inner and outer edges of the shaft wall is reduced by 23.16% and 19.33% respectively for the scheme of circumferential slotting in the main stress direction of surrounding rock.The imbalance coefficient Kσof the extreme stress on the shaft wall decreases from 3.42 to 1.80,and the distribution of stress and displacement is more even.Then,the engineering measures to realize the intervention method of surrounding rock stress field are further explored.Compared with the conventional technical measures such as thickening the shaft wall and using high-grade concrete,the reasonable stress field intervention scheme can provide another solution to treat the unbalanced high stress environment of deep shaft.

关 键 词：应力场干预 深立井 高地应力 围岩控制 

分 类 号：TD322.5[矿业工程—矿井建设]