金山店铁矿-410 m水平主回风巷道稳定性分析  

Stability Analysis of-410 m Horizontal Main Return Air Roadway in Jinshandian Iron Mine

作　　者：王积林 WANG Jilin(Jinshandian Mining Co.,Ltd.,WISCO Resources Group)

机构地区：[1]武钢资源集团金山店矿业有限公司

出　　处：《现代矿业》2024年第7期94-99,共6页Modern Mining

摘　　要：金山店铁矿目前正在回收-410 m水平残留矿体,掘进爆破过程中,主回风巷道会受到爆破振动的影响,存在安全隐患。为了安全合理地进行采矿活动,降低对回风巷道的影响,开展了3次爆破振动现场测试试验,使用最小二乘法线性拟合得到了金山店铁矿的爆破振动衰减规律,确定采场掘进爆破对回风巷道围岩稳定性的影响程度较小。在此基础之上使用LS-DYNA数值模拟软件,模拟出不同爆源距离下的回风巷道围岩的应力、位移和振速衰减规律,确定了爆源距离对回风巷道围岩稳定性的影响程度,有助于保障矿山的稳定运营和经济持续发展。Jinshandian Iron Mine is currently recovering-410 m horizontal residual ore body.In the process of tunneling blasting,the main return air roadway will be affected by blasting vibration,and there are safety risks.In order to carry out mining activities safely and reasonably and reduce the influence on the return air roadway,three field test tests of blasting vibration are carried out.The attenuation law of blasting vibration of Jinshandian Iron Mine is obtained by linear fitting with the least square method,and it is deter⁃mined that the influence of mining blasting on the stability of the surrounding rock of the return air roadway is small.On this basis,LS-DYNA numerical simulation software is used to simulate the stress,displace⁃ment and vibration velocity attenuation laws of the surrounding rock of the return air roadway under different blast source distances,and determine the influence degree of the blast source distance on the stability of the surrounding rock of the return air roadway,which is conducive to ensuring the stable operation of the mine and sustainable economic development.

关 键 词：残留矿体回收 爆破振动 巷道稳定性 数值模拟 

分 类 号：TD322.4[矿业工程—矿井建设]