Results 21 to 30 of about 815,128 (154)

Identifying Trends in Underground Coal Mine Incidents Caused by Roof Falls [PDF]

open access: yes, 2007
Current technology and safety practices generally provide today\u27s underground coal miner with a safe workplace in an unpredictable environment. However, incidents still occur and until the number of incidents resulting in injury or loss of life ...
Cooper, Cary
core   +4 more sources

Research status and development trend of near-bit MWD in underground coal mine

open access: yes, 2023
Near-bit meusurement while drilling (MWD) integrates several key technologies such as near-bit multi-parameter measurement, power supply and communication across positive displacement motor drills, turbine continuous power generation and high-speed mud ...
Shijun, HAO   +5 more
core   +1 more source

APPLING HIGH WATER PRESSURES EJECTOR SYSTEM TO CONTROL DUST IN QUANG NINH UNDERGROUND COAL MINE [PDF]

open access: yesSustainable Extraction and Processing of Raw Materials Journal, 2023
In recent years, in Quang Ninh coal underground mine, longwall mining has been increasingly applied to meet the energy demand. This has resulted in the potential for increased mining dust.
Phuong Thao Dang, Van Thao Le
doaj   +1 more source

Microbial diversity and biogenic methane potential of a thermogenic-gas coal mine [PDF]

open access: yes, 2014
The microbial communities and biogenic methane potential of a gas coal mine were investigated by cultivation-independent and cultivation-dependent approaches.
Wei, Min   +3 more
core   +1 more source

Projectile generator design for underground coal mine seal testing [PDF]

open access: yes, 2021
Underground coal mines have several dangers, one of the most hazardous of which is the possibility of an explosion caused by the ignition of methane gas.
Steward, Ethan Allan
core   +1 more source

Research on personnel re-recognition method in coal mine underground based on improved metric learning

open access: yesGong-kuang zidonghua, 2023
In the traditional personnel re-recognition method in coal mine underground based on metric learning, because metric learning ignores the absolute distance between positive and negative samples, the gradient of the loss function disappears or disperses ...
ZHANG Liya, WANG Yu, HAO Bonan
doaj   +1 more source

Characterising the acid mine drainage potential of fine coal wastes [PDF]

open access: yes, 2013
Includes bibliographical references.Acid mine drainage (AMD) is one of the major environmental challenges facing the South African mining sector. Acid mine drainage has received significant public attention in recent years.
Kotelo, Lerato Olga
core   +1 more source

Coal mine intelligence and mine-used 5G

open access: yesGong-kuang zidonghua, 2020
Aiming at characteristics of electrical explosion-proof and large wireless transmission attenuation in underground coal mine, 5G technology and its application scope were analyzed.Mine-used 5G should adopt intrinsically safe explosion-proof. Mine-used 5G
SUN Jiping
doaj   +1 more source

Probe on 5G architecture applied in coal mine underground

open access: yesGong-kuang zidonghua, 2020
Through comparing and analyzing network deployment of 5G non-standalone (NSA) and standalone (SA) as well as their advantages and disadvantages, and combining with current status of 4G 'one network one base-station' generally applied in coal mine ...
MENG Qingyong
doaj   +1 more source

Coal mine underground maps

open access: yes, 2005
Audio recording and transcript of Shari Lindsay's April 2005 presentation to the Nanaimo Historical Society about the atlas she's created featuring the underground workings of coal mines in the Nanaimo area, from Cassidy to Lantzville. A fifth generation
Lindsay, Shari
core   +1 more source

Home - About - Disclaimer - Privacy