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DOI:
有色金属(矿山部分):2022,74(4):34-38
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控制爆破技术优化在杏山铁矿巷道贯通中的应用
张 达1,杨子龙2
((1.首钢集团有限公司矿业公司,河北 迁安 064400;2.北京科技大学,北京 100083))
Application of controlled blasting technology optimization in tunnel penetration of Xingshan iron mine
ZHANG Da 1, YANG Zilong2
((1. Mining Company of Shougang Group Co., Ltd., Qian''an Hebei 064400, China; 2. University of Science and Technology Beijing, Beijing 100083, China))
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投稿时间:2022-04-26    修订日期:2022-05-25
中文摘要: 地采矿山无底柱分段崩落法开采中,对于已运行的风井或管缆井进行爆破,会出现爆破飞石对井内电缆造成严重损伤的问题,影响整个采场供电系统,对井下回采和其他作业的安全产生威胁。结合杏山铁矿地采的现场情况,通过探孔探明现场实际现状,采用预留隔离保安岩层与控制爆破抛渣方向技术,对-236 m水平1#风井联络道实施贯通爆破。本次风井联络道爆破采用先后两次爆破,将乳化药卷Ф36 mm×450 mm均改为Ф32 mm×330 mm。第一次是进行小断面掏槽爆破,降低爆破破坏作用,为第二次爆破提供抛渣自由面。第二次是对轮廓面进行爆破,改变贯通爆破的抛渣方向,安全高效完成了-236 m水平1#风井联络道贯通爆破工程,为今后同类工程的实施提供了实践经验。
Abstract:In the subsection caving method mining without a bottom pillar in the underground mining mountain, blasting the operating air shaft or cable shaft will cause serious damage to the cables in the shaft caused by blasting flying stones, affecting the power supply system of the entire stope, and affecting the underground mining and mining. Threats to the safety of other operations. Combined with the on-site conditions of the Xingshan iron mine, the actual status of the site was verified through exploration holes, and the technology of reserved isolation and security rock formation and control of blasting and slag-throwing direction was used to carry out penetration blasting on the -236 m horizontal 1# air shaft connection channel. This time, the blasting of the air shaft connection channel was blasted twice successively, and the ∮36 mm×450 mm of the emulsion charge was changed to ∮32 mm×330 mm. The first time is to carry out small-section undercut blasting to reduce the damage of blasting and provide a free surface for slag throwing for the second blasting. The second time is to blast the profile surface, change the slag throwing direction of the through blasting, and complete the through blasting project of the -236 m horizontal 1# air shaft connection channel safely and efficiently, providing practical experience for the implementation of similar projects in the future.
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基金项目:*国家自然科学基金青年(51804016)
引用文本:
张 达,杨子龙.控制爆破技术优化在杏山铁矿巷道贯通中的应用[J].有色金属(矿山部分),2022,74(4):34-38.
ZHANG Da,YANG Zilong.Application of controlled blasting technology optimization in tunnel penetration of Xingshan iron mine[J].NONFERROUS METALS(Mining Section),2022,74(4):34-38.

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