Results 91 to 100 of about 739,679 (204)

Study of the health effects of coal mining on coal mine workers of Baluchistan

International Journal of Occupational Safety and Health, 2017
Background: The data on coal mine workers was collected from May 2009 to April 2010.Objective:To study the health issues of coal mine workers. Methods: Two types of data were collected. Primary data was obtained through topographic survey and questionnaire while Secondary data about the health   issues, medical facilities and other allied facilities of
openaire   +4 more sources

Annual report.

Vols. for 1913-1940 called 1st-28th.Mode of access: Internet.Issued by the State Inspector of Coal Mines, 1913-39; by the Coal Mine Inspection Dept., 1940-59.Continued by: Colorado. Division of Mines. Coal.Continues: Colorado.
Colorado. Coal Mine Inspection Division. Coal., Colorado. Coal Mine Inspection Division., Colorado. State Inspector of Coal Mines.   +2 more
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Stress and permeability evolution characteristics of a long distance upper protected coal seam based on hydromechanical coupling and gas extraction technology

Scientific Reports
To address the ambiguity in the coupling mechanism between stress and gas seepage in the upper protected coal seam during deep and long-distance protective layer mining, this study takes the V8 coal seam (protective layer) and IV5-6 coal seam (upper ...
Keliang Zhan, Zhaohui Liu, Dejun Wei, Wei Yao, Wei Zhou, Rongchang Zhu, Yongmeng Yuan, Yuzhong Yang, Dongliang Zhang, Bing Li   +9 more
doaj   +1 more source

Coal mine

, 1900
View of interior coal mine, Central Coal Company ...
Smith, Eugene Allen, 1841-1927
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Geochemical characteristics and genesis of element enrichment of niobium-rich-rare earth metal layer in Longtan Formation of Zhina coalfield

Meitian dizhi yu kantan
BackgroundWith the increasing demand for strategic metals and the gradual depletion of traditional metal deposit resources, coal and coal-bearing rock series are considered to be potential sources of rare metals, and coal series associated has become one
Yunlong DING, Fangfa WANG, Bi LI, Lifang TANG, Yi YANG, Shangyuan LI, Xiaofang WANG, Yinhong ZOU, Yang WANG   +8 more
doaj   +1 more source

Denoising method and application of microseismic signals for coal seam hydraulic fracturing based on deep neural network mode

Meitan xuebao
To address the challenges of low signal-to-noise ratio and difficulty in phase picking of microseismic signals induced by coal fracturing during hydraulic fracturing in coal seams, a deep neural network model based on a masking strategy is proposed (Mask
Quangui LI, Yulong ZHAO, Qianting HU, Yunpei LIANG, Wanjie SUN, Wenxi LI, Jinfei ZHAN, Jiangfu HE, Kun HE, Haiyu CHEN   +9 more
doaj   +1 more source

asaki666/Coal-Mine-Drill-Pipe: First release of drill depth recognition

<p>Based on the video data from the underground coal mine, this method determines the number of drill rods to be removed by identifying two objects, the unit head and the front end of the body, and identifying the distance between the two in real ...
asaki666
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Coal-mine fatalities in the United States ...

As of 08/22/2018, GPO could not validate the distribution status of this title for the FDLP.At head of title: Department of the Interior, Bureau of Mines, Mode of access: Internet.Issued by: United States Bureau of Mines, 1914-Report for 1920 contains ...
United States. Bureau of Mines.
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Lehigh Coal and Navigation Company Records - Item 2596: Draft of the Great Coal Mine Near Mauch Chunk

This schematic shows a draft of the great Coal-Mine near Mauch Chunk exhibiting the various branches of the Rail-road leading from it and the situation of the workings on the 18 of July 1827.

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Characteristics and Key Technologies of Digital Coal Mine

, 2011
In view of problem that meaning of digital coal mine ca't be understood fully in construction process of demonstration mine of digital coal mine in China, the paper discussed concept and characteristics, included contents and present condition of ...
LIANG Hong, PAN Tao
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