###
有色金属(矿山部分):2024,76(2):45-52
←前一篇   |   后一篇→
本文二维码信息
码上扫一扫!
填塞长度对单孔爆破轴向损伤分布影响研究
魏可心1,徐振洋1,叶图强2,任碧琦1,闫祎然1
((1. 辽宁科技大学 矿业工程学院,辽宁 鞍山 114051; 2. 广东宏大控股集团股份有限公司,广州 510623))
Research on the influence of stemming length on the axial damage distribution of single-hole blasting
WEI Kexin 1, XU Zhenyang 1, YE Tuqiang 2, REN Biqi 1, YAN Yiran 1
((1. School of Mining Engineering, University of Science and Technology Liaoning, Anshan Liaoning 114051, China; 2. Guangdong Hongda Holding Group Co., Ltd., Guangzhou 510623, China))
摘要
图/表
参考文献
相似文献
本文已被:浏览 137次   下载 157
投稿时间:2023-10-06    修订日期:2023-10-26
中文摘要: 为研究在爆破过程中填塞长度对圆柱岩样爆破效果的影响,通过数值模拟方法建立了分区域圆柱岩样单孔装药的三维模型。通过改变填塞长度,对爆破过程中填塞物及圆柱岩样的损伤情况、位移变化和裂纹扩展进行了对比分析。结果表明:模拟结果与圆柱岩样实验室爆破裂纹扩展与损伤情况相一致,验证爆破模型可有效模拟岩石爆破过程。在填塞长度为炮孔长度的23.7%内,填塞长度的增加可显著抑制填塞物冲出炮孔程度,而超过此区间后,单位抑制效应微弱。填塞长度从炮孔长度的7.9%到39.5%,岩柱表面裂纹网络复杂程度逐渐降低,但裂隙宽度显著增加。在炸药引爆后岩柱中部区域的损伤值最高,在填塞长度为炮孔长度的23.7%时取得最高值为0.75。在岩柱上部区域,损伤随填塞长度呈现凹形变化,差值在0.0543;而五种填塞长度在岩柱中部区域的损伤差值最大,为0.0679;对岩柱下部区域的损伤影响较小,变动幅度为0.0099。填塞长度的合理选取为实现精确区域爆破和提高爆破效果提供了新的途径。
Abstract:To investigate the effect of stemming length on the blasting of cylindrical rock samples, a three-dimensional zone-divided model of cylindrical rock samples undergoing single-hole charging was established through numerical simulation methods. A comparative analysis was conducted on the damage, displacement, and crack propagation of the stemming and rock by changing the stemming lengths. The simulation results were consistent with the observed crack propagation and damage during the blasting process of the cylindrical rock samples in the laboratory, validating the effectiveness of the blasting model in simulating the rock blasting process. Within a stemming length that constitutes 23.7% of the borehole length, an increase in stemming length considerably suppresses the extent of stemming expulsion from the borehole and the unit inhibition effect diminishes beyond this range. As stemming length increases from 7.9% to 39.5% of the borehole length, the complexity of surface crack networks gradually decreases while crack width significantly increases. The highest damage value, reaching 0.75, occurs in the middle region of the rock pillar at a stemming length of 23.7% of the borehole length. In the upper region of the rock pillar, the damage shows a concave change with the stemming length, with a difference of 0.0543. Among the five stemming lengths, the largest difference in damage is observed in the middle region of the rock pillar, with a value of 0.0679. The impact of the damage in the lower region of the rock pillar is relatively small, with a variation amplitude of 0.0099. The reasonable selection of stemming length offers a new approach to achieving precise regional blasting and improving blasting effectiveness.
文章编号:     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(51974187);辽宁省教育厅重点项目(LJKZ0282)
引用文本:
魏可心,徐振洋,叶图强,任碧琦,闫祎然.填塞长度对单孔爆破轴向损伤分布影响研究[J].有色金属(矿山部分),2024,76(2):45-52.
WEI Kexin,XU Zhenyang,YE Tuqiang,REN Biqi,YAN Yiran.Research on the influence of stemming length on the axial damage distribution of single-hole blasting[J].NONFERROUS METALS(Mining Section),2024,76(2):45-52.

我们一直在努力打
造,精品期刊,传
播学术成果

全国咨询服务热线
86-10-63299757

杂志信息

期刊简介

相关下载

联系我们

电话:010-63299757

传真:010-63299754

QQ:XXXXXXX

Email:ysjsks@sina.com;ysjsks@163.com

邮编:100160

地址:北京市南四环西路188号总部基地十八区23号楼

关注微信公众号