新屋田露天矿拒爆原因分析及解决方案  

Cause Analysis and Solutions of Blast Rejection in Xinwutian Open-pit Mine

作　　者：胡敏 张俊杰 姚煜国 邹孝能 江飞 HU Min;ZHANG Junjie;YAO Yuguo;ZOU Xiaoneng;JIANG Fei(Jiangxi Yadong Cement Co.,Ltd.)

机构地区：[1]江西亚东水泥有限公司

出　　处：《现代矿业》2022年第8期81-84,共4页Modern Mining

摘　　要：新屋田露天矿短期密集发现9个拒爆孔。为解决此问题,在排除了爆破器材质量、爆破器材性能、网络设计和人为操作等一般因素后,从起爆具组合和炮孔环境入手,通过对地区季节气候环境、岩层水文环境、各厂家起爆器材组合爆破效果、不同器材水下接触环境、雷管管体规格变化等进行层层剖析,并对各项可能原因进行试验验证。分析认为,数码电子雷管聚能穴与起爆具功能孔孔底起爆药芯间距过大,受含水炮孔水介质间隔影响,雷管起爆能加速衰减,从而导致拒爆。根据分析结果制订加长数码电子雷管管体的解决方案,成功克服了拒爆现象的发生。Nine blast-rejection holes were found in Xinwutian Open-pit Mine in short term.In order to solve this problem,after excluding the general factors such as blasting equipment quality,blasting equipment performance,network design and man-made operation,starting from the combination of initiating explosive devices and blasthole environment,the seasonal climate environment of the region,the hydrological environment of the rock strata,the blasting effect of the combination of initiating explosive devices of various manufacturers,the underwater contact environment of different devices,and the change of the specifications of the detonator are analyzed,and the possible causes are tested and verified.The analysis shows that the distance between the energy-gathering cavity of the digital electronic detonator and the detonating core at the bottom of the functional hole of the detonating device is too large,and the detonator initiation can accelerate the attenuation due to the influence of the water medium interval of the water-bearing blast hole,resulting in the blast rejection.According to the analysis results,a solution for lengthening the digital electronic detonator tube is developed,which successfully overcomes the occurrence of blast rejection.

关 键 词：水孔爆破 拒爆 起爆能 接口标准 器材组合 

分 类 号：TD235[矿业工程—矿井建设] TD87