Theoretical and numerical simulation investigation of deep hole dispersed charge cut blasting
Chengxiao Li1
Renshu Yang2
Yanbing Wang1
Yiqiang Kang1
Yuantong Zhang1
Pin Xie3
1.School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China2.School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China3.Gubei Coal Mine of Huaizhe Coal and Electricity Co.,Ltd,Huainan 232150,China
摘要：Drilling and blasting methods have been used as a common driving technique for shallow-hole driving and blasting in rock roadways.With the advent of digital electronic detonators and the need for increased production efficiency,the traditional blasting design is no longer suitable for deep hole blasting.In this paper,a disperse charge cut blasting method was proposed to address the issues of low excavation depth and high block rate in deep hole undercut blasting.First,a blasting model was used to illustrate the mechanism of the deep hole dispersive charge cut blasting process.Then,continuous charge and dispersed charge blasting models were developed using the smooth particle hydrodynamics-finite element method(SPH-FEM).The cutting parameters were determined theoretically,and the cutting efficiency was introduced to evaluate the cutting effect.The blasting effects of the two charging models were analyzed utilizing the evolution law of rock damage,the number of rock particles thrown,and the cutting efficiency.The results show that using a dispersed charge improves the cutting efficiency by about 20％and the rock breakage for the deep hole cut blasting compared to the traditional continuous charge.In addition,important parameters such as cutting hole spacing,cutting hole depth and upper charge proportion also have a significant impact on the cutting effect.Finally,the deep hole dispersed charge cut blasting technology is combined with the digital electronic detonator through the field engineering practice.It provides a reference for the subsequent deep hole cutting blasting and the use of electronic detonators in rock roadways.
机标关键词：simulationdeepholeblastingchargedispersedinvestigationnumerical
论文发表日期：2023-02-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：21( 87-107 )
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