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Advances in Rock Blasting and Mining
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Advances in Rock Blasting and Mining

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 8634

Special Issue Editor

Prof. Dr. Zhongwen Yue

E-Mail Website
Guest Editor
School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
Interests: rock mechanics; intelligent mining; lithologic identification
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Taking urban underground space as the main body, various environmental geotechnical engineering problems in the process of underground space development and utilization, the rational utilization strategy of underground space resources, as well as the design, calculation methods, and construction techniques of various underground structures need to be studied. At the same time, it is necessary to study the impact of excavation of foundation pits (including precipitation from foundation pits) on adjacent existing buildings and environments, the design and calculation theories and methods of foundation pit support structures, the optimization design and reliability analysis technology of foundation pit support structures, the analysis theory of slope stability, and the development and application of new support technologies. Potential topics include but are not limited to the following: geotechnical engineering, blasting engineering, mining engineering, and other aspects of scientific research and development of excavation equipment.

Prof. Dr. Zhongwen Yue
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • geotechnical engineering
  • blasting engineering
  • mining engineering

Published Papers (5 papers)

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Research

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17 pages, 12535 KiB  
Article
The Spatio-Temporal Evolution of Rock Failure Due to Blasting under High Stress
by Gang Lei, Shengyan Zhu, Xiaozhang Shi and Dawei Wu
Appl. Sci. 2023, 13(5), 2781; https://doi.org/10.3390/app13052781 - 21 Feb 2023
Viewed by 877
Abstract
The research aims to investigate the failure characteristics of rock caused by blasting under high stress, explore the energy generation and its transfer and release in rock under the effects of blasting. Physical experiments and numerical simulations were performed. The results showed that, [...] Read more.
The research aims to investigate the failure characteristics of rock caused by blasting under high stress, explore the energy generation and its transfer and release in rock under the effects of blasting. Physical experiments and numerical simulations were performed. The results showed that, as with AE time-series data, the attenuation time of the AE activity increases with the number of blasting events, thereby decreasing the overall stability of the samples. In terms of AE spatial evolution, different initial stress fields play a role in directional guidance in initiation, propagation, and coalescence of blasting-induced cracks. The direction of propagation of microcracks is consistent with the direction of the maximum principal stress. The blasting-induced disturbance in a high-stress state accelerates the extension and propagation of microcracks and is accompanied by the occurrence of numerous high-energy AE events. Numerical simulation showed that the maximum principal stress exhibits a guiding effect on the propagation of blasting-induced cracks and the pattern development of the damage zone, which is consistent with the conclusion of physical experiments. The research provides a theoretical guidance for designing and optimising the blasting parameters of deep rock. Full article
(This article belongs to the Special Issue Advances in Rock Blasting and Mining)
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13 pages, 5142 KiB  
Article
Numerical Study Investigating the Blasting Efficiency of the Long and Large-Diameter Uncharged Hole-Boring Method with Deck Charge Technique
by Min-Seong Kim, Wan-Kyu Yoo, Wooseok Kim, Sungpil Hwang, Chang-Yong Kim and Sean Seungwon Lee
Appl. Sci. 2023, 13(4), 2099; https://doi.org/10.3390/app13042099 - 6 Feb 2023
Viewed by 1376
Abstract
The long and large-diameter uncharged hole-boring (LLB) method is a cut-blasting method used to reduce vibration induced by blasting. This method typically involves creating an uncharged hole with a 382 mm diameter and drilling 50 m in the tunnel excavation direction at a [...] Read more.
The long and large-diameter uncharged hole-boring (LLB) method is a cut-blasting method used to reduce vibration induced by blasting. This method typically involves creating an uncharged hole with a 382 mm diameter and drilling 50 m in the tunnel excavation direction at a time. This method is reported to provide relatively good vibration reduction and with high blasting efficiency through short hole blasting compared to traditional cut methods. In this study, an advanced LLB method incorporating deck charge blasting was investigated to improve the blasting efficiency during long hole blasting. Numerical analysis was performed via ANSYS LS-DYNA to investigate the effectiveness of the deck charge technique. In the original LLB method, explosives were used to break the rocks more finely, and the fragmented rocks were concen trated at the end of the blast holes. On the contrary, the modified LLB, in which two-part explosives were loaded into the blast holes, is expected to push the fragmented rocks to the tunnel face more effectively than the original LLB method. Therefore, it is expected that the proposed LLB method combined with a deck charge technique can achieve superior blasting efficiency. Full article
(This article belongs to the Special Issue Advances in Rock Blasting and Mining)
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19 pages, 6674 KiB  
Article
Experiments and Fluent–Engineering Discrete Element Method-Based Numerical Analysis of Block Motion in Underwater Rock-Plug Blasting
by Liang Wu, Zhijian Liang, Ming Chen and Junru Zhou
Appl. Sci. 2023, 13(1), 348; https://doi.org/10.3390/app13010348 - 27 Dec 2022
Cited by 4 | Viewed by 1525
Abstract
Underwater rock-plug blasting is a special blasting technique for excavating underwater inlets. In the process of rock-plug blasting excavation, the blasting-block movement from the difference in water pressure inside and outside the tunnel is one of the key factors for successful construction. Laboratory [...] Read more.
Underwater rock-plug blasting is a special blasting technique for excavating underwater inlets. In the process of rock-plug blasting excavation, the blasting-block movement from the difference in water pressure inside and outside the tunnel is one of the key factors for successful construction. Laboratory underwater rock-plug blasting experiments were conducted using small explosive charges, and a high-speed camera was adopted to observe and study block motion. Then, numerical simulations were conducted for the model experiment based on the Fluent and Engineering Discrete Element Method (EDEM) coupling program developed using the user-defined function (UDF) interface to reveal the mechanism underpinning the penetration of underwater rock-plug blasting. The results showed that the process of block motion in underwater rock-plug blasting can be divided into two stages. In the first stage, broken blocks move to two sides along the axis of the rock plug under the blast load. A blasting crater is formed on the downstream end face of the rock plug under the effects of the free face, while the upstream end face is loosened, or blocks are ejected under the influence of the water pressure. In the second stage, blocks flow to the broken-rock pit under the effects of water scouring and gravity, and, finally, the rock plug is penetrated. The larger the head of water and the opening angle of the rock plug are, the better the penetration effect for the rock plug is. The Fluent–EDEM coupling algorithm was in good agreement with the experimental results in terms of the rock-plug blasting effect and the velocity curve of the blocks, indicating that the coupling method had a favorable effect in simulating the interaction of blocks and water during underwater rock-plug blasting. The findings are expected to promote the application and popularization of the rock-plug blasting technique and can provide a reference for rock-plug blasting in water-intake and water-diversion projects. Full article
(This article belongs to the Special Issue Advances in Rock Blasting and Mining)
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16 pages, 4760 KiB  
Article
Investigation on Cutting Blasting Efficiency of Hard Rock Tunnels under Different Charge Diameters
by Pengfei Gao, Qi Zong, Bing Cheng, Haibo Wang, Ying Xu and Binbin Zhang
Appl. Sci. 2022, 12(19), 9906; https://doi.org/10.3390/app12199906 - 1 Oct 2022
Cited by 4 | Viewed by 1621
Abstract
Considering the low efficiency of cutting blasting in hard rock mine tunnels, a novel solution of increasing the charge diameter of the cutting holes was put forward. To investigate the influence of the charge diameter on the cutting blasting results, three different working [...] Read more.
Considering the low efficiency of cutting blasting in hard rock mine tunnels, a novel solution of increasing the charge diameter of the cutting holes was put forward. To investigate the influence of the charge diameter on the cutting blasting results, three different working conditions of Φ 32 mm, Φ 42 mm, and Φ 50 mm blasting holes combined with Φ 27 mm, Φ 35 mm, and Φ 45 mm cartridges, respectively, were taken as the investigation objects. At first, the theoretical destruction ranges of single cutting holes under the three different charge diameters were computed. The computed results showed that the destruction range of the cutting holes could be expanded by increasing the charge diameter, which would be beneficial to the destruction of the rock far away from the cutting holes in the cutting cavity. Subsequently, numerical simulations of cutting blasting under the three different charge diameters were performed to display the dynamic propagation process of the blasting stress wave. Importantly, the stress field intensity in the cutting cavity was enhanced significantly with the charge diameter. The stronger stress field intensities generated by the larger diameter charges were more conducive to breaking the rock in the cutting cavity into small fragments that were easy to be discarded. Ultimately, a hard rock vertical slope was used instead of the driving face to carry out the cutting blasting experiments, and the hole utilizations of the cutting blasting were 70.4%, 82.0%, and 94.0%, respectively, under the three different charge diameters, from small to large. The experimental results forcefully substantiated that a higher cutting blasting efficiency could be achieved by increasing the charge diameter of cutting holes in hard rock mine tunnels. Full article
(This article belongs to the Special Issue Advances in Rock Blasting and Mining)
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Review

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34 pages, 7000 KiB  
Review
A Comprehensive Review of Mechanisms, Predictive Techniques, and Control Strategies of Rockburst
by Muhammad Faisal Waqar, Songfeng Guo and Shengwen Qi
Appl. Sci. 2023, 13(6), 3950; https://doi.org/10.3390/app13063950 - 20 Mar 2023
Cited by 9 | Viewed by 2631
Abstract
Brittle failure, also known as rockburst, is a violent phenomenon that occurs during the excavation of hard rock in areas with high geostress, particularly at great depths. The induced hazards have been a global concern since the first half of the 20th century, [...] Read more.
Brittle failure, also known as rockburst, is a violent phenomenon that occurs during the excavation of hard rock in areas with high geostress, particularly at great depths. The induced hazards have been a global concern since the first half of the 20th century, leading to extensive efforts to understand the mechanisms and develop effective approaches to predict and control such rock mass failures. To understand the current state of research and future prospects of rockburst, a comprehensive review of past developments has been conducted. Firstly, we briefly summarize different definitions and types of rockburst. Next, we delve into the various technologies and methods employed in rockburst research and analyze the current knowledge on the mechanisms, classifications, and prediction of rockbursts. Then, we examine the existing methods for preventing and controlling these events. Despite the advancements made, the relationship between the behavior of rock masses at different scales, both in the laboratory and real-world conditions, remains an area of challenge. Additionally, the absence of rock mass classifications under high in-situ stress and lack of accuracy in rockburst prediction methods remain persistent issues that need to be addressed. This study delves into cutting-edge rockburst research, illuminating potential ground support strategies and empowering the mining industry in order to unleash innovative solutions for controlling these explosive phenomena. Full article
(This article belongs to the Special Issue Advances in Rock Blasting and Mining)
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