Article
Chemistry, Multidisciplinary
Zhonglian Luo, Jiaming Li, Shibin Tang, Xiaoshuang Li, Leitao Zhang
Summary: This study presents a theoretical and numerical investigation on the influence of temperature change on rock failure and the possibility of rockbursts under high-temperature and high in situ stress conditions. The results show that ventilation and cooling can reduce the possibility of rockbursts, but continuous cooling may increase the risk of wall rock failure. The study also discusses the effects of convection heat transfer coefficient, in situ stress, and fault effect on the stress distribution and possibility of rockbursts.
APPLIED SCIENCES-BASEL
(2022)
Article
Computer Science, Interdisciplinary Applications
Haoyu Han, Daisuke Fukuda, Hongyuan Liu, Ebrahim Fathi Salmi, Ewan Sellers, Tingjin Liu, Andrew Chan
Summary: In this study, the combined finite-discrete element method (FDEM) was used to investigate rockbursts in deep tunnels under high in-situ stresses, with a focus on the Jinping II Hydropower Station drainage tunnel. The effects of geological and geotechnical characteristics, pre-existing faults, and in-situ stresses on rockburst development were studied. The study highlighted the importance of fault location and dip angle, lateral pressure coefficient, and tunnel shape in determining rockburst occurrences around tunnels.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Environmental
Lei Hu, Xia-Ting Feng, Zhi-Bin Yao, Wei Zhang, Wen-Jing Niu, Xin Bi, Guang-Liang Feng, Ya-Xun Xiao
Summary: This article proposes a rockburst time warning method based on microseismic monitoring and the blasting cycle as the unit of time. The developed models achieve accuracies of approximately 74.6%, 71.2%, and 63.1% for predicting rockburst occurrence in subsequent blasting cycles in a railway tunnel excavation. This combination of MS monitoring and artificial intelligence provides a new approach for rockburst time warning.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Construction & Building Technology
Rujiu Zhang, Yaoru Liu, Shaokang Hou
Summary: This study is crucial for evaluating the risk of rockbursts in deep-tunnel construction. It introduces a new rockburst criterion based on energy dissipation rate index and explores the role of structural planes in rockburst potential. By conducting numerical simulations and a case study, the effectiveness of the criterion is validated. The findings provide insight into the influence of structural planes on rockbursts and offer a methodology for rockburst evaluation and prevention in tunnel construction.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Xingbo Han, Xiaoming Liang, Fei Ye, Xin Wang, Ziming Chen
Summary: Rockbursts pose a serious threat to engineering safety. This article analyzes the rockburst data from the Qinling Tunnel of the Hanjiang-Weihe River Diversion Project to investigate the size and locations of rockfalls, the volume of blasts, and the relationships between rockbursts and lithology, and between rockbursts and buried depth. It also examines the form of rockburst damage and summarizes specific construction methods under different rockburst levels. Additionally, a method for replacing the cutter head under rockburst risk after long-distance tunnelling is proposed.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Geological
Jianchao Wang, Guoqing Chen, Yaxun Xiao, Shaojun Li, Yi Chen, Zhibin Qiao
Summary: Rockburst is a type of dynamic failure that can cause significant damage during underground construction. This study in Southwest China found that microseismic activity increases when joints with large scale appear and vanish, impacting rockburst risk. The dip angle of joints influences the likelihood of rockburst occurrence.
ENGINEERING GEOLOGY
(2021)
Article
Engineering, Geological
Fengqiang Gong, Wuxing Wu, Li Ren
Summary: By combining rock drilling unloading devices and triaxial systems, the influence of unloading effect of a circular tunnel face on rockburst process was investigated. Experimental tests were conducted on intact cubic red sandstone samples to simulate strain rockburst under high initial stress and internal unloading. It was found that internal unloading affects sidewall failure, causing strength-weakening effect which becomes more significant with an increase in buried depth.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Yong Fan, Xianze Cui, Zhendong Leng, Junwei Zheng, Feng Wang, Xiaole Xu
Summary: This research discussed the rockbursts that occurred during the construction of a diversion tunnel at Jinping II hydropower station and numerically described the brittle-ductile-plastic transition property of Jinping marble. The dynamic energy release process derived from the transient unloading of in-situ stress plays a crucial role in rockburst events.
FRONTIERS IN EARTH SCIENCE
(2021)
Review
Energy & Fuels
Yulong Chen, Junwen Zhang, Jiahao Zhang, Bin Xu, Luji Zhang, Wenxin Li
Summary: With the rapid development of underground caverns in fields such as hydraulic engineering, mining, railway, and highway, the frequency and intensity of rockburst and dynamic instability have gradually increased, becoming a bottleneck in the safe construction of deep caverns. This paper reviews the current understanding of rockburst precursors and the dynamic failure mechanism of deep tunnels, focusing on the stability of surrounding rock and methods for predicting rockbursts. Identified gaps in understanding aim to encourage further research in these areas.
Article
Geosciences, Multidisciplinary
Tian-hui Ma, Chun-an Tang, Fei Liu, Shi-chao Zhang, Zhi-qiang Feng
Summary: Rockburst hazard is a significant issue in deep rock mechanics, and can be effectively monitored and controlled through methods such as microseismic monitoring and numerical simulation. This approach has been successfully applied in deep underground engineering projects to reduce the incidence of rockburst events.
GEOMATICS NATURAL HAZARDS & RISK
(2021)
Article
Engineering, Environmental
Haosen Guo, Li Chen, Jinyang Zhu, Qiancheng Sun, Yaxun Xiao
Summary: This study focused on the prediction of instantaneous strain-structural-plane slip rockbursts in deep-buried hard rock tunnels. Through in situ testing, the distribution of structural planes in the surrounding rock and their influence on rockburst formation were visualized and analyzed. The results provide valuable insights for the estimation and prediction of rockbursts.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Environmental
Xiqi Liu, Gang Wang, Yan Chang, Leibo Song, Kai Liu
Summary: The tangential stress is high on tunnel walls and decreases in a gradient manner towards the interior of surrounding rocks. A mesoscopic model was created to study the effect of stress gradient on rockburst failure mechanisms. By using the particle flow code (PFC), the model analyzed the failure modes and energy evolution under different gradient stresses. The model also explored the features of acoustic emission (AE) events during rockbursts.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Geochemistry & Geophysics
Peng Xiao, Diyuan Li, Quanqi Zhu
Summary: In this study, a method to calculate the release of strain energy caused by excavation in pre-stressed rock is proposed. The influence of excavation height and width on strain energy release is inconsistent. The increase in lateral pressure coefficient leads to an exponential increase in strain energy release.
Article
Construction & Building Technology
Peng -Xiang Li, Bing-Rui Chen, Ya-Xun Xiao, Guang-Liang Feng, Yang-Yi Zhou, Jin-Shuai Zhao
Summary: Reasonable tunnel spacing is crucial in deeply buried tunnels to reduce the risk of rockburst occurrence. A study was conducted to investigate the effects of tunnel spacing on rockburst and microseismic activity during TBM excavation. It was found that increasing the spacing between twin tunnels significantly decreased rockburst frequency and microseismic radiated energy.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Construction & Building Technology
Pengxiang Li, Jinshuai Zhao, Wankui Bu, Wenjing Niu, Pinpin Liu, Minghong Sun
Summary: Choosing reasonable control measures can effectively prevent and mitigate rockburst risks, reducing time and engineering costs. The susceptibility of tunnels excavated by TBMs to rockbursts requires urgent research on mitigation measures.
Article
Construction & Building Technology
Abdul Muntaqim Naji, Muhammad Zaka Emad, Hafeezur Rehman, Hankyu Yoo
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2019)
Article
Energy & Fuels
Abdul Muntaqim Naji, Hafeezur Rehman, Muhammad Zaka Emad, Saeed Ahmad, Jung-joo Kim, Hankyu Yoo
Review
Geosciences, Multidisciplinary
Kausar Sultan Shah, Mohd Hazizan bin Mohd Hashim, Muhammad Zaka Emad, Kamar Shah bin Ariffin, Muhammad Junaid, Naseer Muhammad Khan
ARABIAN JOURNAL OF GEOSCIENCES
(2020)
Article
Environmental Sciences
Muhammad Usman Khan, Kelly O. Homan, Saqib A. Saki, Muhammad Zaka Emad, Muhammad Azeem Raza
Summary: Diesel exhaust is a major cause of occupational diseases, with DPM exposure leading to respiratory, lung, and heart issues. NIOSH and IARC classify DPM as 'probable carcinogenic' and 'carcinogenic'. Monitoring DPM in underground mines is challenging, with this study focusing on the evolution and application of real-time monitoring, different monitors' performance, and regulations in the US and other countries.
INTERNATIONAL JOURNAL OF MINING RECLAMATION AND ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Muhammad Badar Hayat, Muhammad Danishwar, Amna Hamid, Mirza Muhammad Zaid, Muhammad Zaka Emad
Summary: The study developed a dry beneficiation process for low-grade kaolin, focusing on creating a size difference between kaolinite and impurities using steel balls clad with rubber and classifying the feed with an air classifier. The process achieved high-grade kaolinite with a relatively high recovery rate through grinding, classification, and air classification processes.
Article
Environmental Studies
Atta Ur Rehman, Muhammad Zaka Emad, Muhammad Usman Khan, Muhammad Ahsan Saleem, Saqib A. Saki
Summary: Mining is one of the most hazardous industries due to unsafe working conditions. Research on mine accidents in Pakistan has been focused, but very little attention has been given to investigating and analyzing the mine accidents reporting system in the country. The study identifies that the increase in mining fatalities in Pakistan is attributed to primitive mining practices, negligence of workers, lack of resources, slackness from regulatory bodies and mine management, and a poor accident reporting mechanism. A new accident reporting tool is proposed to improve safety by holding stakeholders accountable for accidents.
Article
Green & Sustainable Science & Technology
Naseer Muhammad Khan, Kewang Cao, Qiupeng Yuan, Mohd Hazizan Bin Mohd Hashim, Hafeezur Rehman, Sajjad Hussain, Muhammad Zaka Emad, Barkat Ullah, Kausar Sultan Shah, Sajid Khan
Summary: The uniaxial compressive strength (UCS) and static Young's modulus (E-s) are essential parameters for designing engineering structures in a rock mass environment. This study developed prediction models for UCS and E-S, taking into account the thermal effect on marble rock. The best model, based on the performance measures, was found to be the random forest (RF) model.
Article
Mathematics
Naseer Muhammad Khan, Kewang Cao, Muhammad Zaka Emad, Sajjad Hussain, Hafeezur Rehman, Kausar Sultan Shah, Faheem Ur Rehman, Aamir Muhammad
Summary: Thermal treatment and cooling conditions can induce damage to rocks. The damage can be quantified through laboratory evaluation or computer simulations. An artificial neural network (ANN) based on porosity was found to be the most efficient model for quantifying rock damage.
Article
Agronomy
Yasmeen Saleem, Muhammad Zaka Emad, Aamir Ali, Shagufta Naz
Summary: This study evaluated the response of different plant growth regulators on callus induction and regeneration in three sugarcane genotypes. The best callus response was obtained with the combination of 2,4-D and Kinetin, while Kinetin and BAP were found to be the most effective for shoot induction, and NAA and IBA were used for root induction. The results provide valuable information for optimizing tissue culture protocols for sugarcane.
Article
Green & Sustainable Science & Technology
Sajjad Hussain, Naseer Muhammad Khan, Muhammad Zaka Emad, Abdul Muntaqim Naji, Kewang Cao, Qiangqiang Gao, Zahid Ur Rehman, Salim Raza, Ruoyu Cui, Muhammad Salman, Saad S. Alarifi
Summary: The study developed four different predictive models to estimate the rock mass deformation modulus (Em), with the Artificial Neural Network (ANN) model proving to be the most suitable for accurate prediction. The findings of this research will offer valuable insights and groundwork for professionals in rock engineering field when predicting various engineering parameters, particularly Em, for sustainable engineering design.
Article
Metallurgy & Metallurgical Engineering
M. A. Raza, A. Hassan, M. U. Khan, M. Z. Emad, S. A. Saki
Summary: Digital modelling is essential for Earth science and mining applications, particularly in creating high-fidelity topographic surfaces through digital terrain models (DTMs). DTMs are constructed from 2D data collected using various techniques, such as ground surveying, LiDAR, radar, and GPS. Interpolation or extrapolation is necessary to estimate heights at points without available data. Different interpolation techniques exist, categorized based on factors like area size, accuracy, smoothness, continuity, and preciseness. This study examines DTM production methods using Surfer (R) software and highlights the importance of method selection due to the impact on outcomes. Natural neighbor interpolation appears to be the most effective for mining volume estimations based on the dataset (R2 = 0.969, beta = 0.98, P < 0.0001).
JOURNAL OF THE SOUTHERN AFRICAN INSTITUTE OF MINING AND METALLURGY
(2023)
Article
Metallurgy & Metallurgical Engineering
M. Z. Emad, Y. Majeed, G. Rehman
Summary: This paper focuses on the extraction and processing methods of rock salt in the Salt Range area of Pakistan, with experimental results indicating that the wedges and feathers technique is the most suitable method for mining rock salt blocks.
JOURNAL OF THE SOUTHERN AFRICAN INSTITUTE OF MINING AND METALLURGY
(2022)
Article
Engineering, Civil
Muhammad Zaka Emad, Muhammad Usman Khan, Muhammad Azeem Raza, Saqib Ahmad Saki, Muhammad Aijaz, Muhammad Usman Tahir
Summary: Numerical modeling is a useful tool for assessing inaccessible areas or unexpected conditions in geotechnical engineering. Rock mass classification, joint analysis, and stability assessment are crucial factors to consider in the design of half tunnels in steep rock slopes. The study recommends choosing suitable half tunnel designs in hard rock based on rock mass classification and stability assessment results.
TRANSPORTATION INFRASTRUCTURE GEOTECHNOLOGY
(2022)
Article
Mining & Mineral Processing
Atta Ur Rehman, Muhammad Zaka Emad, Muhammad Usman Khan
ARCHIVES OF MINING SCIENCES
(2020)
Article
Mining & Mineral Processing
Y. Majeed, M. Z. Emad, G. Rehman, M. Arshad
JOURNAL OF MINING SCIENCE
(2019)
