高分段硬岩无切割井爆破拉槽试验研究  

Experimental Study on Blasting Grooving of Non-cutting Well in High-segment Hard Rock

作　　者：刘小强 寇旭东 许永斌 LIU Xiaoqiang;KOU Xudong;XU Yongbin(Anhui Development Mining Co.,Ltd.;Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.)

机构地区：[1]安徽开发矿业有限公司,安徽省六安市237400 [2]中钢集团马鞍山矿山研究总院股份有限公司

出　　处：《现代矿业》2024年第11期16-18,21,共4页Modern Mining

摘　　要：吴集铁矿(北段)采用高分段开采时,传统的切割井存在施工安全性差、周期长、成本高等缺点。结合矿体的特点,借鉴类似矿山成功经验,设计开展高分段硬岩中无切割井爆破拉槽试验。通过补偿空间理论计算论证了高分段硬岩开采时无切割井爆破拉槽的可行性,并进行了爆破工艺参数设计。试验结果表明:当分段高度为25 m时,中深孔施工精度难以控制,存在夹制作用大的问题,爆破失败风险较高;对于高分段硬岩的开采,无切割井爆破拉槽效果较差。试验结果可为类似矿山提供参考。WhenWuji Iron Mine(northern section)adopts high-segment mining,the traditional cutting wells have the disadvantages of poor construction safety,long cycle and high cost.Combined with the characteristics of the ore body and the successful experience of similar mines,the blasting grooving test of non-cutting well in high-segment hard rock was designed and carried out.The feasibility of blasting grooving of non-cutting well in high-segment hard rock mining is demonstrated by the theoretical calculation of compensation space,and the blasting process parameters are designed.The test results show that when the segmentation height is 25 m,the construction accuracy of medium-length hole is difficult to control,there is a problem of large clamping production,and the risk of blasting failure is high.For the mining of high-segment hard rock,the effect of blasting grooving of non-cutting well is poor.The test results can provide reference for similar mines.

关 键 词：高分段采场 硬岩 爆破拉槽 预裂爆破 

分 类 号：TD235[矿业工程—矿井建设] TD861.1