基于RHT本构模型的连续装药预裂爆破孔距优化研究  

Optimization Study of Pre-Splitting Hole Spacing for Continuous Charging Based on RHT Constitutive Model

作　　者：张伟 王建国[1,2] 王勉 陶家龙 ZHANG Wei;WANG Jianguo;WANG Mian;TAO Jialong(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Advanced Blasting Technology Engineering Research Center of Yunnan Province Education Department,Kunming 650093,Yunnan,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南省教育厅爆破新技术工程研究中心,云南昆明650093

出　　处：《高压物理学报》2025年第1期109-118,共10页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(52274083);云南省基础研究计划(202201AT070178);云南省重大科技专项计划项目(202102AG050024)。

摘　　要：为解决北衙金矿在使用预裂爆破技术时整体爆破效果不佳的问题,基于RHT损伤本构模型,利用ANSYS/LS-DYNA数值模拟软件,开展了不同孔距下预裂爆破的数值模拟研究。结果表明:当预裂孔炮孔间距为120 cm时,孔间裂纹存在较为明显的分叉,且裂纹扩展范围较大;当炮孔间距为130 cm时,裂纹向四周扩展的范围减小,且炮孔周围岩石的损伤程度明显降低;当炮孔间距增加至140 cm时,相邻预裂孔连线上的裂纹仅在局部连通,无法实现孔间贯穿。上述结果说明,130 cm的炮孔间距在降低预裂爆破自身对岩体的扰动与实现有效爆破成缝之间达到了平衡。基于数值模拟试验结果开展了现场试验,爆破效果良好。研究结果可为矿山的预裂爆破设计和施工提供参考。In order to solve the problem of poor overall blasting effect when using pre-splitting blasting technology in Beiya gold mine,based on RHT damage constitutive model,numerical simulation research on pre-splitting blasting under different hole spacings was carried out by using ANSYS/LS-DYNA numerical simulation software.The results show that when the hole spacing of pre-splitting hole is set to 120 cm,the crack between holes has obvious bifurcation and the crack propagation range is large.When the hole spacing is set to 130 cm,the crack propagation range decreases within the surrounding area,and the rock damage around the blast hole is obviously reduced.When the hole spacing is further increased to 140 cm,it is found that the cracks on the connecting line of adjacent pre-splitting holes are only locally connected and cannot penetrate through holes.It shows that the 130 cm hole spacing has reached an ideal balance between reducing the disturbance of the pre-splitting blasting itself to the rock mass and achieving effective blasting.Based on the results of numerical simulation,the site test has achieved good blasting effect.The research results can provide reference for the design and construction of pre-splitting blasting in similar mines.

关 键 词：预裂爆破 连续装药 孔距优化 RHT本构模型 

分 类 号：O346[理学—固体力学] O521.9[理学—力学]