Results 71 to 80 of about 69,019 (276)

Study on fracture parameter calibration and failure characteristics of rock with hole and crack

Deep Underground Science and Engineering, EarlyView.
The SIF and plastic zone equations for a single hole and crack have been derived. The model's failure state leads to the identification of four types of cracks. The plastic zone increases with increased brittleness and decreased crack length. Abstract Cracks within the surrounding rock of roadways significantly affect their stability and failure ...
Shaochi Peng, Wensong Wang
wiley   +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

Research on automatic detection and alarm methods for coal mine rock burst and coal and gas outburst accidents

Gong-kuang zidonghua
The automatic perception and alarm method for coal mine rock burst and coal and gas outburst is an effective measure to timely detect accidents and emergency rescue, reduce casualties, avoid or reduce secondary accidents such as gas and coal dust ...
SUN Jiping, CHENG Jijie
doaj   +1 more source

Investigation on the pore characteristics of coal specimens with bursting proneness [PDF]

Scientific Reports, 2019
AbstractTo achieve further insight into the pore characteristics, the coal specimens with different bursting proneness before and after uniaxial compression failure are tested and compared in this paper. The data of mercury intrusion test is corrected by that of low-temperature nitrogen adsorption and desorption test (LTNAD). The pore size distribution
Li, Yutao, Jiang, Yaodong, Zhang, Bo, Song, Honghua, Dong, Wenbo, Wang, Pengpeng   +5 more
openaire   +2 more sources

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Classification of coal bursting liability of some chinese coals using machine learning methods

Scientific Reports
AbstractThe classification of coal bursting liability (CBL) is essential for the mitigation and management of coal bursts in mining operations. This study establishes an index system for CBL classification, incorporating dynamic fracture duration (DT), elastic strain energy index (WET), bursting energy index (KE), and uniaxial compressive strength (RC).
Chao Wang, Yv Liu, Yuefeng Li, Xiaofei Liu, Qiwei Wang   +4 more
openaire   +3 more sources

Coal bursting tendency evaluation by needle penetration test

Meitan xuebao, 2023
The bursting tendency is the inherent mechanical property of coal, and the important basis for evaluating the degree of coal bursting risk in underground coal mine. In this paper, an experimental method based on a needle penetration test for a rapid determination of coal bursting tendency was proposed.
Yixin ZHAO, Ronghuan XIE, Yirui GAO
openaire   +1 more source

Listen to Nice [PDF]

, 2013
In describing Humphrey Jennings’ wartime documentary propaganda film, 'Listen to Britain' (1942), a film with an overtly poetic sensibility and dominantly musical soundtrack, John Corner asserts that ‘through listening to Britain, we are enabled to ...
Aitken Ian, Aldgate Anthony, Anderson Lindsay, Barsam Richard, Birtwistle Andy, Caux Jacqueline, Cavalcanti Alberto, Chanan Michael, Corner John, Elsaesser Thomas, Grierson John, Grierson John, Grierson John, Hill John, Hubble Nick, Jennings Humphrey, Kaufman Boris, Korda Alexander, Marley Keith, Mitchell Donald, Nicholls Bill, Pudovkin V. I., Pérez Fernando, Ruby Jay, Ruttmann Walter, Salles Gomez P.E., Sussex Elizabeth, Sussex Elizabeth, Tomlinson Charles, Vaughan Dai, Vertov Dziga, Vigo Jean, Watt Harry, Watt Harry   +33 more
core   +1 more source

An optimizing microseismic method for rock burst early warning based on mining production process

Deep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han, Linming Dou, Wu Cai, Mingbo Chi, Guojun Xi, Shuai Chen, Biao Jiao   +6 more
wiley   +1 more source

Lignosulfonate as a Strength Additive for Non-Wood Paperboard [PDF]

, 2000
Recycle mills that use old corrugated cardboard (OCC) in their furnish experience difficulties in maintaining the quality of the paperboard produced. Recycle mills using the OCC collect their OCC from many parts of the world.
Martin, Francisco L.
core   +1 more source