多空区条件下相邻中段矿柱回采爆破技术  

Recovery and Blasting Technologies for Adjacent Middle-section Ore Pillars under Multi-goaf Conditions

作　　者：高兆全 何文斌 赵世锐 原新宇 杨智广 GAO Zhaoquan;HE Wenbin;ZHAO Shirui

机构地区：[1]赤峰中色白音诺尔矿业有限公司,内蒙古赤峰025473 [2]辽宁工大爆破工程有限责任公司,辽宁阜新123000 [3]辽宁工程技术大学爆破技术研究院,辽宁阜新123000

出　　处：《科技创新与应用》2024年第34期1-10,共10页Technology Innovation and Application

摘　　要：采空区对矿山安全构成严重威胁,而回采矿柱则是有效利用残矿资源的重要手段。爆破技术是回采矿柱的常规方法。因此,如何高效利用爆破技术实现空区治理和矿柱回采具有重要意义。该文以赤峰白音诺尔铅锌矿3~6#矿体800中段矿柱和750中段间柱回采工程为例进行研究。在多个采空区和周边设施设备安全的前提下,通过对初选爆破方案和优化爆破参数进行数值模拟,采用扇形布孔、临孔交错装药结构、排间和空间分区延时等新技术,实现对采空区的治理和矿柱的回采。工程实践表明,回采的矿柱全部崩落至采空区,对750底板和下部采场没有产生任何影响;爆破大块率降低至4%;重点保护的目标质点振速低于规范值。研究成果对指导类似矿山施工具有一定的借鉴价值。Goafs pose a serious threat to mine safety,and mining pillar is an important means to effectively utilize residual ore resources.Blasting technology is a common method to recover ore pillars.Therefore,how to efficiently use blasting technology to achieve goaf management and pillar recovery is of great significance.This paper takes the mining project of middle pillar 800 and middle pillar 750 in No.3~6 ore bodies of Baiyinnuoer Lead-Zinc Mine in Chifeng as an example.On the premise of ensuring the safety of multiple goafs and surrounding facilities and equipment,through numerical simulation of the primary blasting plan and optimization of blasting parameters,new technologies such as fan-shaped hole layout,adjacent hole staggered charging structure,row and spatial zoning delay are adopted to achieve the management of goafs and the extraction of ore pillars.Engineering practice has shown that all the recovered pillars have collapsed into the goaf,which has no impact on the 750 floor and the lower stope;the blasting bulk rate has been reduced to 4%;and the vibration velocity of key protected target particles is lower than the specification value.The research results have certain reference value for guiding the construction of similar mines.

关 键 词：空区治理 矿柱回采 扇形布孔 临孔交错装药结构 爆破技术 

分 类 号：TD235.1[矿业工程—矿井建设]