Article(id=1321866314906456649, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1321866297609146910, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1748275200000, receivedDateStr=2025-05-27, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793087088561, onlineDateStr=2026-10-27, pubDate=1779638400000, pubDateStr=2026-05-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793087088561, onlineIssueDateStr=2026-10-27, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793087088561, creator=13701087609, updateTime=1793087088561, updator=13701087609, issue=Issue{id=1321866297609146910, tenantId=1146029695717560320, journalId=1225396423026438145, year='2026', volume='46', issue='5', pageStart='1', pageEnd='312', issueExtLink='null', onlineDate='null', pubDate='1779638400000', pubDateStr='2026-05-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793087084438, creator='13701087609', updateTime=1793094562481, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1321897662853533805, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1321866297609146910, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1321897662853533806, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1321866297609146910, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=53, endPage=64, ext={EN=ArticleExt(id=1321866315325887050, articleId=1321866314906456649, tenantId=1146029695717560320, journalId=1225396423026438145, language=EN, title=Optimization of Blasting Parameters for Fan-Shaped Medium-Length Holes in Filling Stope of Deep Iron Mines, columnId=null, journalTitle=Mining Research and Development, columnName=null, runingTitle=null, highlight=null, articleAbstract=

Aiming at the problems of roof over-excavation, roof failure and high block rate in the deep mining process of an iron mine, taking the ore body between －360 m and －450 m level of the mine as the engineering background, the optimization of blasting parameters for fan-shaped medium-length holes was carried out. Based on the mechanism of ore rock blasting fragmentation and the theoretical formula of blasting parameters, the theoretical value range of each blasting parameter was derived. Combined with the physical and mechanical properties of ore rock and the performance parameters of on-site explosives, Ansys LS-DYNA numerical simulation software was used to construct a stope blasting model with different hole bottom spacings, explosive unit consumption and resistance line combinations, and the effective stress distribution characteristics of the mine roof were analyzed. The results show that when the hole bottom spacing is 1.4 m and the explosive unit consumption is 2.09 kg/m³, the maximum effective stress of the monitoring grid in the room area is closest to the maximum dynamic tensile strength of the rock, which can fully break the ore rock in the hole bottom area, and the maximum effective stress of the roof monitoring grid does not reach the dynamic tensile strength, and the roof is stable. When the minimum resistance line is 1.6 m, the average maximum effective stress of the monitoring grid near the free surface is 44.31 MPa, and the peak value of blasting vibration velocity in the roof area is 18.51 cm/s, which does not exceed the allowable standard of blasting vibration safety. Based on the optimized parameters (hole bottom spacing 1.4 m, explosive unit consumption 2.09 kg/m³, minimum resistance line 1.6 m), the field industrial test was carried out. The bulk rate is reduced from 6% before optimization to 3%. The roof is well formed, the surface is flat, and there is no obvious crack and collapse. The research results can provide reference for the optimization of fan-shaped medium-length hole blasting parameters in similar deep filling stopes.

, authors=Ping Wang¹, Cong Guan¹, Aiping Cheng¹, Linfang Mei², Chunyuan Huang³, Zenggui Zhang³, authorsList=Ping Wang, Cong Guan, Aiping Cheng, Linfang Mei, Chunyuan Huang, Zenggui Zhang, authorCompany=null, correspAuthors=Cong Guan, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1321866316110221899, articleId=1321866314906456649, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=深部铁矿充填采场扇形中深孔爆破参数优化研究, columnId=1226462294490657775, journalTitle=矿业研究与开发, columnName=采矿与矿山充填, runingTitle=null, highlight=null, articleAbstract=

针对某铁矿深部开采过程中存在顶板超挖、顶板破坏及大块率高等问题，以该矿－360~－450 m水平之间的矿体为工程背景，开展了扇形中深孔爆破参数优化研究。基于矿岩爆破破碎机理和爆破参数理论公式，推导了各爆破参数的理论取值范围；结合矿岩物理力学特性与现场炸药性能参数，运用Ansys LS-DYNA数值模拟软件构建了不同孔底距、炸药单耗和抵抗线组合的采场爆破模型，分析了矿房顶板的有效应力分布特征。结果表明：当孔底距为1.4 m、炸药单耗为2.09 kg/m³时，矿房区域监测网格的最大有效应力与岩石最大动态抗拉强度最为接近，可充分破碎孔底区域矿岩，且顶板监测网格的最大有效应力未达到动态抗拉强度，顶板稳定；当最小抵抗线为1.6 m时，自由面附近监测网格的最大有效应力平均值为44.31 MPa，顶板区域爆破振速峰值为18.51 cm/s，未超过爆破振动安全允许标准。基于优化后的参数（孔底距1.4 m、炸药单耗2.09 kg/m³、最小抵抗线1.6 m）开展现场工业试验，大块率由优化前的6%降低至3%，顶板成型良好，表面平整，无明显的裂隙和坍塌现象。研究结果可为类似深部充填采场的扇形中深孔爆破参数优化提供参考。

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王平（1972—），男，湖北监利人，教授，研究方向为采矿工程。E-mail: 434931490@qq.com

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