基于爆破振速演变规律的采场安全分析  

Stope safety analysis based on blasting vibration velocity evolution law

作　　者：林之岳 黎俊华 王道林 Lin Zhiyue;Li Junhua;Wang Daolin(Yinshan Mining Co.,Ltd.of JiangXi Copper Corporation Limited;Yongping Copper Mine of Jiangxi Copper Corporation Limited;School of Resources and Safety Engineering,Central South University)

机构地区：[1]江西铜业集团银山矿业有限责任公司 [2]江西铜业集团有限公司永平铜矿 [3]中南大学资源与安全工程学院

出　　处：《黄金》2023年第3期5-11,共7页Gold

基　　金：中南大学中央高校基本科研业务费专项资金资助项目(2022ZZTS0415)。

摘　　要：在金属矿资源回采过程中,井下采场爆破对地表建(构)筑物、堤坝及边坡等稳定性带来严重威胁,尤其对于赋存有高陡边坡的露天地下联合开拓矿山。针对永平铜矿面临的井下矿体回采爆破与临近高陡边坡稳定性之间的矛盾,开展了地表及井下爆破振动监测,按照振速统计分析原理及萨道夫斯基经验公式,分析并得出了爆破引起的质点振动特性及振速衰减规律,在多数测点所测得的最大振速普遍分布于0~1 cm/s,主频分布在0~150 Hz。并按照边坡岩体的爆破地震波衰减规律和当地的地震烈度,确定了Ⅳ号矿体不同采场生产所允许的最大单段药量,为矿山的安全生产提供理论和实践依据。In the process of recovering metal ore resources,underground stope blasting poses a serious threat to the stability of surface structures(buildings),dams,and slopes,especially for open-pit joint development of mines with high and steep slopes.In this paper,based on the contradiction between the mining and blasting of the underground ore body faced by the Yongping Copper Mine and the stability of the nearby high and steep slopes,the vibration monitoring of the surface and underground blasting is carried out.The particle vibration characteristics and vibration velocity attenuation law caused by blasting are obtained based on vibration velocity statistical analysis principles and the Sadovsky formula,and it is concluded that the maximum vibration velocity measured at most measuring points is generally distributed in 0-1 cm/s,and the main frequency is distributed in 0-150 Hz.According to the blasting seismic wave attenuation law of the slope rock mass and the local seismic intensity,the maximum charge per section allowed for the production of the No.IV ore body in different stopes is determined,which provides a theoretical and practical basis for the safe production of the mine.

关 键 词：爆破 爆破振动 振速 振动监测 边坡 安全 

分 类 号：TD853[矿业工程—金属矿开采]