Results 51 to 60 of about 14,170 (290)

Optimization of cut‐hole layout under high in situ stress based on numerical simulation and field tests

Deep Underground Science and Engineering, EarlyView.
This study investigates the blast‐induced rock damage patterns under different cut‐hole layouts and ground stress conditions through numerical simulations and field tests. The findings in this study provide valuable insights for similar underground engineering applications.
Junjie Zhao, Diyuan Li, P. G. Ranjith, Xinxin Lü, Yanliang Li, Xiaoli Su   +5 more
wiley   +1 more source

ORGANISATIONAL-TECHNOLOGICAL CHARACTERISTICS OF BLASTING WORKS ON THE GRIČ TUNNEL

Rudarsko-geološko-naftni Zbornik, 2005
The paper describes organisational-technological characteristics of blasting works during the excavation of the Grič Tunnel. The significance of blasting works during the excavation of the tunnel is shown through adjustment of blasting parameters taking ...
Zvonimir Deković, Zvonimir Ester, Mario Dobrilović   +2 more
doaj  

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

Deep Underground Science and Engineering, EarlyView.
The rock failure mode is significantly influenced by the contributing factors, such as the joint inclination, the initial confining pressure, and the unloading point. We found six typical rock failure modes after a large number of numerical tests. Abstract Excavation unloading damages rock masses, with preferential failure along geological defects in ...
Fei Liu, Changhui Liang, Sijia Liu, Yongjun Zhang, Luo Wang   +4 more
wiley   +1 more source

Construction Optimization of Shallow Railway Tunnels under Unsymmetrical Pressure for Reducing Blasting Over-excavation

Chengshi guidao jiaotong yanjiu
Objective Over-excavation in tunnel construction, mainly caused by inappropriate blasting,will affect the smooth progress and safety of tunnel excavation, increase construction cost and reduce economic benefits.
YUAN Fengjie, WANG Haoqian, SONG Guanping, YUAN Lang, GAO Hang, XU Qianwei   +5 more
doaj   +1 more source

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

Deep Underground Science and Engineering, EarlyView.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza, Hendrik Grobler, Moshood Onifade, Manoj Khandelwal   +3 more
wiley   +1 more source

Dynamic response and safety control of adjacent tunnels under blasting excavation of drainage tunnels

Yantu gongcheng xuebao
In the process of parallel blasting excavation of two tunnels, the construction of new tunnels will cause different degrees of vibration damage to the linings of the adjacent tunnels due to the small tunnel spacing. In this study, the blasting excavation
WANG Xubin 1 , YANG Zhenye 2, HUANG Ning 2, QIAN Jiangu 1
doaj   +1 more source

A review on rockburst prediction and prevention to shape an ontology‐based framework for better decision‐making for underground excavations

Deep Underground Science and Engineering, EarlyView.
A scientometric analysis of 2449 journal articles and a comprehensive review of 336 papers were conducted, discussing and identifying challenges and research gaps in rockburst prediction and prevention and proposing an ontology‐based framework for better decision‐making in underground excavations. Abstract With underground engineering projects becoming
Hongchuan Yan, Haijiang Li, Hongqiang Xie, Mingli Xiao, Jianliang Pei, Huaizhong Liu, Jiangda He   +6 more
wiley   +1 more source

Development of a Model to Predict Vibrations Induced by Blasting Excavation of Deep Rock Masses under High In Situ Stress

Shock and Vibration, 2020
During the process of blasting excavation of deep rock masses under high in situ stress, energy produced by the explosive and the strain energy released by rock mass excavation constitute the energy source of vibration.
Yong Fan, Xianze Cui, Zhendong Leng, Yurong Zhou, Junwei Zheng, Feng Wang   +5 more
doaj   +1 more source

Numerical Analysis of the Influence of Foundation Pit Blasting on a Nearby Metro Tunnel

Shock and Vibration, 2021
It is important to guarantee the safety of adjacent underground structures during the foundation pit blasting excavation of modern city construction. The blasting excavation construction of a large, deep foundation pit near an existing metro station of ...
Haibo Wang, Yaoyao Wang, Mengxiang Wang, Qi Zong   +3 more
doaj   +1 more source

Extension of Gutenberg-Richter Distribution to Mw -1.3, No Lower Limit in Sight [PDF]

, 2009
With twelve years of seismic data from TauTona Gold Mine, South Africa, we show that mining-induced earthquakes follow the Gutenberg-Richter relation with no scale break down to the completeness level of the catalog, at moment magnitude MW −1.3.
Boettcher, Margaret S, Johnston, Malcolm J, McGarr, Art   +2 more
core   +3 more sources