Results 91 to 100 of about 73,550 (313)
Optimal selection test of material ratio in the top of Ordovician limestone grouting reconstruction
Meitan kexue jishuIt is an effective method to reduce the risk of floor water inrush by grouting reconstruction and sealing of water channel on top of Ordovician limestone before deep confined water mining in Huabei type coal mine in China. The basic properties of fly-ash
Zhenli FAN +5 more
doaj +1 more source
Coal operator mining facts - 2003 [PDF]
In 2003, a total of 1,972 coal mining operations reported employment to the Mine Safety and Health Administration (MSHA). Coal mines comprised 13.7% of all mining operations. A total of 70,241 employees, corresponding to 75,425 full-time equivalent (FTE)
core
Deep Underground Science and Engineering, EarlyView.This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski +4 more
wiley +1 more source
A NEW CHALLENGE FOR THE ROMANIAN COAL INDUSTRY: ELIMINATION OF THE STATE AID [PDF]
According to the European Commission decision N 239/2007 the Romanian coal industry will receive state aid by the end of 2010. After this period public companies in this sector will finance the costs of current production and investment entirely by their
Gruian Claudiu-Marian
core
Best Practices for Dust Control in Coal Mining [2010] [PDF]
"Respirable dust exposure has long been known to be a serious health threat to workers in many industries. In coal mining, overexposure to respirable coal mine dust can lead to coal workers' pneumoconiosis (CWP).
core +1 more source
Deep Underground Science and Engineering, EarlyView.A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li +7 more
wiley +1 more source
Research on intelligent conveying technology of 500 m ultra-long face scraper
Meitan kexue jishuIn the field of medium and thick coal seam mining, intelligent mining of ultra-long face is the development trend of coal mining technology, and intelligent transportation is an important part of it.Based on the summary of the problems of the scraper ...
Weixiu CUI +3 more
doaj +1 more source
Deed of settlement of the Tomago Coal Mining Company.
Cover title.; Includes index.; Ferguson, no.
Tomago Coal Mining Company.
core
Bardo Coal Mining Company, Blue Diamond Coal Company, Wallins Creek Coal Company
, 1940 The scrips from the Bardo Coal Mining Company have values of 5¢, 10¢, and $1. The scrips from the Blue Diamond Coal Company have values of 5¢ and $1.
Wallins Creek Coal Company +2 more
core
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 +6 more
wiley +1 more source