大红山铜矿点柱预裂爆破损伤控制  

Damage Control of Point Pillar Presplitting Blasting in Dahongshan Copper Mine

作　　者：郑超 黄原明 赵艳伟[2] 胡正祥[2] 王正雄 左雪飞 王建国[1] ZHENG Chao;HUANG Yuanming;ZHAO Yanwei;HU Zhengxiang;WANG Zhengxiong;ZUO Xuefei;WANG Jianguo(College of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yuxi Mining Co.,Ltd.,Yuxi 653499,China;Yunnan Fuel First Chemical Technology Co.,Ltd.,Qujing 655600,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]玉溪矿业有限公司,云南玉溪653499 [3]云南燃一化工科技有限责任公司,云南曲靖655600

出　　处：《有色金属工程》2024年第5期104-112,共9页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(52274083);兴滇英才支持计划(CCC21321262A);云南省基础研究计划(202201AT070178);云南省重大科技专项(202202AG050014)

摘　　要：地下矿山在采用房柱法或者房柱法嗣后充填采矿法开采的过程中,为保证采场的稳定性,往往会预留大部分的矿柱来支撑着上部岩体。目前采用的一些采矿方法在一定程度上会对矿柱的稳定性造成损伤,因此研究和预防矿柱损伤变得至关重要。通过对比大红山铜矿西矿段180中段360-B144采场常规点柱法回采与点柱边界预裂爆破法两个方案,对矿柱造成的损伤来研究矿柱的稳定性。结果表明,常规点柱法回采爆破对矿柱的损伤深度在1.47 m左右,而点柱边界预裂爆破对矿柱的损伤深度在1.21 m左右,点柱边界预裂爆破与常规点柱法回采爆破相比,对周边矿柱的损伤影响较小。点柱边界预裂爆破区矿柱岩体声速变化幅度为9.02%,小于常规点柱法回采爆破区矿柱岩体声速变化幅度14.65%。During underground mining using room-and-pillar method or room-and-pillar subsequent filling mining method,in order to ensure the stability of the quarry,most of the pillars are often reserved to support the upper rock body.Some mining methods used nowadays cause damage to the stability of the pillars to a certain extent,so it is crucial to study and prevent the damage to the pillars.In this paper,the stability of the pillars is investigated by comparing the damage caused by the conventional point-pillar method and the point-pillar boundary pre-cracking and blasting method in the west section of the Dahongshan Copper Mine in the middle of the 180th section of the 360-B144 quarry.The findings show that the damage depth of the conventional point-pillar mining is about 1.47 m,while the damage depth of the point-pillar boundary pre-cracking blasting is about 1.21 m,and the damage impact of the point-pillar boundary pre-cracking blasting on the neighboring pillars is smaller than that of the conventional point-pillar mining.The change of sound velocity of the rock body in the point pillar boundary pre-cracking blasting area is 9.02%,which is smaller than the change of sound velocity of the rock body in the conventional point-pillar blasting area by 14.65%.

关 键 词：声波测试 预裂爆破 损伤效应 矿柱 

分 类 号：TD235[矿业工程—矿井建设]