降低结构面发育露天矿爆破大块率的技术措施  

Technical measures to reduce blasting boulder rate of open-pit mine with structural plane development

作　　者：王晓 张晓华 赵曰超 苏筱嘉 杨亚明 王珂 WANG Xiao;ZHANG Xiaohua;ZHAO Yuechao;SU Xiaojia;YANG Yaming;WANG Ke(Henan Xunda Blasting Co.,Ltd.,Jiaozuo 454000,China;Public Security Corps of Shandong Provincial Public Security Department,Jinan 250000,China;Tengzhou Xinyan Stone Co.,Ltd.,Zaozhuang 277000,China)

机构地区：[1]河南迅达爆破有限公司,河南焦作454000 [2]山东省公安厅治安总队,山东济南250000 [3]滕州市鑫岩石料有限责任公司,山东枣庄277000

出　　处：《露天采矿技术》2020年第6期52-55,共4页Opencast Mining Technology

摘　　要：为了降低爆破大块率,从而减少二次破碎工程量,在露天矿深孔台阶爆破施工中,提出并采用了增大炮孔密集系数、更换炸药品种、优化起爆网路、缩短炮孔堵塞长度、深孔间加密浅孔等技术措施。结果表明:综合应用以上技术措施,有效地降低了结构面发育位置和孔口堵塞段的大块率,取得了较好的爆破效果,提高了铲装效率和日生产量。In order to reduce the blasting boulder rate and reduce the amount of secondary crushing,in the deep hole bench blasting construction of open-pit mine,the article proposes and adopts some technical measures,such as increasing the blasting hole density coefficient,changing the explosive variety,optimizing the initiation network,shortening the plugging length of the blast hole,and densifying the shallow holes between the deep holes.The results show that the comprehensive application of the above technical measures can effectively reduce the development position of the structural plane and the block rate of the blocking section of the orifice,achieve good blasting effect,and greatly improve the shoveling efficiency and daily production.

关 键 词：结构面发育 露天矿 大块率 爆破参数 炸药匹配 起爆网路 

分 类 号：TD824.2[矿业工程—煤矿开采]