超深竖井爆破掘进围岩损伤规律数值模拟研究  

Numerical Simulation Study on Damage Law of Surrounding Rock in Blasting Excavation of Ultra-deep Shaft

作　　者：杨小林 张光然 褚怀保[1] 孙博[1] 徐杰 王东辉 陈璐阳 郭鹏 王少华 YANG Xiao-lin;ZHANG Guang-ran;CHU Huai-bao;SUN Bo;XU Jie;WANG Dong-hui;CHEN Lu-yang;GUO Peng;WANG Shao-hua(School of Civil Engineering,Henan Polytechnic University,Jiaozuo 451003,China)

机构地区：[1]河南理工大学土木工程学院,焦作451003

出　　处：《爆破》2024年第2期8-14,39,共8页Blasting

基　　金：国家自然科学基金(No.52130403)深部金属矿连续智能化安全开采基础研究。

摘　　要：为了分析爆破荷载作用下超深竖井围岩损伤演化规律,基于三山岛金矿西岭副井爆破施工实践,采用数值模拟的方法,基于ANSYS/LS-DYNA重启动技术,根据爆破设计方案,利用等效爆炸荷载方法,分别对四种地应力(15 MPa、30 MPa、45 MPa和60 MPa)和四种侧压系数(1.0、1.25、1.5和2.0)条件下超深竖井爆破掘进围岩损伤进行数值计算;分析竖井围岩损伤效应,研究地应力与侧压系数对竖井围岩损伤范围的影响。数值计算结果表明:随着地应力的增大,损伤区域受到明显抑制作用,地应力从15 MPa增加到60 MPa,损伤区域的半径从5.75 m减小到3.4 m;随着侧压系数的增大,爆破损伤区域体现出各向异性,损伤区域向较大地应力方向集中。研究成果为控制竖井围岩爆破损伤提供理论基础。This study aims to analyze the damage evolution law of the surrounding rock mass in an ultra-deep shaft under blasting load.To achieve this,a numerical simulation method is adopted based on the blasting construction practice of Xiling Auxiliary Shaft in Sanshandao Gold Mine.The simulation utilizes a restart technology based on ANSYS/LS-DYNA and adopts the equivalent explosion load method according to the blasting design scheme.The surrounding rock mass damage of the ultra-deep shaft is calculated under four different ground stresses(15 MPa,30 MPa,45 MPa,and 60 MPa)and four different side pressure coefficients(1.0,1.25,1.5,and 2.0).Furthermore,this study analyzes the damage effect on the shaft's surrounding rock mass and investigates how ground stress and side pressure coefficient influence the extent of damage to the surrounding rock.The numerical results demonstrate that as ground stress increases from 15 MPa to 60 MPa,there is a significant inhibition in the damage area with a decrease in radius from 5.75 m to 3.4 m.Additionally,it is observed that with an increase in lateral pressure coefficient,there is anisotropy in terms of blasting damage area distribution where greater ground stress leads to concentrated damage areas.

关 键 词：超深竖井 爆破掘进 损伤规律 数值模拟 等效荷载 

分 类 号：TD235.3[矿业工程—矿井建设]