Calculation of blast hole charge amount based on three-dimensional solid model of blasting rock mass

Chen, YingXian; Wang, Pengfei; Chen, Jian; Zhou, Meng; Yang, Hongxia

doi:10.1038/s41598-021-04615-8

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…A new bench blasting model is established based on the model parameters verifed by feld tests. Te parameters of deep bench blasting are as follows: the bench height is 5.5 m, the blast hole diameter is 90 mm, the blast hole depth is 6.5 m, the blasting delay between four rows is 30 ms, the spacing of the blast hole row is 2 m, and explosive consumption per unit volume is 0.53 kg/m 3 [27]. Te left and lower boundaries of the model are nonrefective, simulating the propagation of infnite media blasting.…”

Section: Analysis Of Influencing Factors Of the Open-pit Bench Blasti...mentioning

confidence: 99%

Study on Muck Pile Shape of Open-Pit Bench Blasting Based on PFC

Gao

Zhang

et al. 2023

Shock and Vibration

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To study the influence of different resistance lines and rows delay intervals on the shape of the muck pile and the throwing distance of open-pit bench blasting based on the open-pit bench blasting test, two-dimensional particle flow code (PFC2D) is used for numerical simulation. The experimental and simulation data were compared and analyzed, and the error value was acceptable. Meanwhile, different resistance lines and row delay intervals are used to conduct numerical simulation analysis. The results show that the height change of the muck pile is directly proportional to the resistance line, and the rock throwing distance is inversely proportional to the resistance line change. The best resistance line is 1.75 m in the actual working condition, according to the effect of the muck pile. By fitting the relationship between the resistance line and rock throwing distance and blasting muck pile’s height, it is found that the relationship is nonlinear. By simulating different row delays, the optimal row delay time difference in the bench blasting model is determined to be 25 ms under similar working conditions. It provides a guiding significance for the blasting parameter design under similar working conditions.

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Section: Analysis Of Influencing Factors Of the Open-pit Bench Blasti...mentioning

confidence: 99%

Study on Muck Pile Shape of Open-Pit Bench Blasting Based on PFC

Gao

Zhang

et al. 2023

Shock and Vibration

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“…Sun Shiguo [ 42 ] et al established a three-dimensional model that calculated the displacement and stress of the slope body by the finite difference method and investigated the characteristics of the influence of multi-stage open-pit cascade mining on the stability of the slope and its slope displacement and stress distribution. Chen [ 43 ] et al created a three-dimensional solid model of the rock mass that was blasted by utilizing the lithology data as a sample. They then employed this model to compute the quantity of charge present in the blasted rock mass.…”

Section: Introductionmentioning

confidence: 99%

Generation of 3D finite element mesh of layered geological bodies in intersecting fault zones

Chen,

Yang,

et al. 2024

PLoS ONE

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As the geological fault surface divides the 3D space of stratified ores and rocks into complex spatial surface domains, it is necessary to fully consider the spatial relationship between intersecting fault zones and geological bodies in the process of 3D modeling, and how to accurately establish the 3D finite element mesh of geological bodies in intersecting fault zones is a difficult point in modeling complex geological structure. The laminated geological body in intersecting fault zone is a multifaceted domain grid model consisting of a ground-level grid, a geological fault plane grid, and a range grid. By analyzing the spatial relationship between the geological interfaces of the intersecting fault zones, a closed manifold processing method is proposed to establish the closed manifold spatial surface model of the intersecting fault zones, based on which the closed spatial surface model is tetrahedrally divided to establish a 3D solid model. Finally, the 3D solid model is imported into Ansys to generate a 3D finite element mesh. VC++ is used as the development platform for programming, to realize the generation and closed manifold processing of ground level and geological fault surfaces, and use TetGen library to generate finite element mesh based on irregular tetrahedron. Taking an intersecting fault zone in an open-pit mine as an example, the 3D finite element mesh of laminated geological bodies in the intersecting fault zone is established successfully. This method provides an effective and feasible solution for generating accurate 3D finite element meshes in complex stratigraphic spaces based on closed manifold processing.

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“…The application yielded a satisfactory blasting outcome. Chen et al [15] calculated the blast hole charge amount based on a three-dimensional solid model of the blasting rock mass, aiming to make full use of drilling data and improve the blasting efficiency. Considering the application example of No.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the Effect of Three-Hole Simultaneous Blasting Technology on Open-Pit Mine Bench Blasting

Zhang,

Li,

Wei

et al. 2024

Applied Sciences

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Blasting technology is widely applied in various engineering applications due to its cost-effectiveness and high efficiency, such as in mining, transport infrastructure construction, and building demolition. However, the occurrence of cracking in the rear row has always been a major problem that disrupts mining bench blasting. To address this issue, a three-hole simultaneous blasting technology is proposed in this study. Both numerical simulations and onsite blasting experimental testing were conducted. To aid this endeavor, the three-hole simultaneous blasting and the hole-by-hole blasting methods were adopted to comparatively analyze the severity of the damage caused to the original rock and the effect of rock fragmentation in the rear row. The obtained results highlighted that the outcome of the blast produced by the three-hole simultaneous blasting method is satisfactory, with fewer flying stones and concentrated blasting piles required. Additionally, the original rock in the rear row showed no obvious sign of tensile damage and had uniform fragmentation. It was also found that a block size of less than 60 cm accounts for 100%, while a block size of less than 50 cm accounts for 98.7% of the whole blocks, with no large blocks reported. Moreover, a penetrating horizontal crack occurred in the direction of the connection of the blast hole center when the three-hole simultaneous blasting method was adopted. This resulted in a smooth and flat rear part of the rocks at the interface. Compared to the hole-by-hole blasting method, the three-hole simultaneous blasting method improved the effective stress and displacement at each measurement point. At the measurement point directly at the front of the borehole, the maximum effective stress attained 67.9 GPa, and the maximum displacement reported was 31.9 cm. Overall, it was shown that the three-hole simultaneous blasting technology is applicable in similar applications of mine bench blasting, which is conducive to addressing the rear row original rock strain for onsite bench blasting.

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Calculation of blast hole charge amount based on three-dimensional solid model of blasting rock mass

Cited by 3 publications

References 28 publications

Study on Muck Pile Shape of Open-Pit Bench Blasting Based on PFC

Study on Muck Pile Shape of Open-Pit Bench Blasting Based on PFC

Generation of 3D finite element mesh of layered geological bodies in intersecting fault zones

Experimental and Numerical Study on the Effect of Three-Hole Simultaneous Blasting Technology on Open-Pit Mine Bench Blasting

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