摘要
某铜矿薄矿体主要采用浅孔留矿嗣后充填法开采,开采效率低下,贫化及损失指标难以控制。针对薄矿体开采存在的技术难题,运用中深孔对矿岩界限进行预裂爆破形成预裂缝,对矿体和围岩进行预分离。利用矿体内布置的中深孔爆破,改变矿体内岩石的稳固性,从而实现采场矿体的自然崩落落矿并与围岩进行有效的分离。研究表明:薄矿体中深孔预裂爆破开采技术通过矿岩界限预裂爆破分离矿体及围岩,矿体内炮孔爆破贯通对矿体稳固性改性后实现自然崩落落矿,能够控制采场回采边界,为采场的大规模开采创造有利的外部条件;开采技术适用于急倾斜薄矿体的地下高效开采,可大幅提高开采效率,有效控制矿体开采经济指标。
The thin ore body of a copper mine is mainly mined by Shallow-hole shrinkage mining method with subsequent filling.The mining efficiency is low,and the dilution and loss indexes are difficult to control.Aiming at the technical problems existing in thin orebody mining,the long hole was used to pre-split the ore-rock boundary to form pre-crack,and the ore-body and surrounding rock were separated.The long hole blasting arranged in the ore body can change the stability of the rock in the stope,hence,the ore body natural caving in the stope can be realized and the orebody and rock can be effectively separated.The results showed that the long hole pre-splitting blasting mining technology using in thin ore body can separate ore body and rock by the ore-rock boundary pre-splitting blasting,and realize the orebody natural caving after the stability changed by the perforation blasting,which can control the stope mining boundary and create favorable external conditions for the large-scale mining of the stope.The mining technology is suitable for the efficient underground mining of steeply inclined thin orebody,which can greatly improve the mining efficiency and effectively control the economic index of orebody mining.
作者
党建东
阚忠辉
董凯程
陈刚
DANG Jiandong;KAN Zhonghui;DONG Kaicheng;CHEN Gang(Anhui Tongguan(Lujiang) Mining Co.,Ltd.,Lujiang Anhui 231500,China;BGRIMM Technology Group,Beijing 100160,China;National Centre for International Research on Green Metal Mining,Beijing 102628,China)
出处
《有色金属（矿山部分）》
2022年第1期1-4,25,共5页
NONFERROUS METALS(Mining Section）
基金
国家重点研发计划项目(2018YFE0123000)。
关键词
急倾斜薄矿体
中深孔
预裂爆破
地下高效开采
自然崩落
steeply dipping thin ore body
long hole
pre-splitting blasting
efficient underground mining
the natural caving
作者简介
党建东(1987—),男,工程师,采矿工程专业,主要从事采矿技术及采矿生产管理工作。
