Results 71 to 80 of about 1,774,538 (199)
EnergiesCoalbed methane (CBM), recognized as a sustainable and environmentally friendly energy source, plays a crucial role in mitigating global climate change and advancing low-carbon energy solutions. However, the prevalence of low-permeability coal seams poses a significant challenge to effective CBM extraction.
Guo, Xiaoyang +5 more
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Influence of pore-fracture structure characteristics of coal rock on its damage evolution law
Meitan kexue jishuThe development and expansion of fractures in coal rocks are the primary causes of mining disasters, such as gas outbursts, rock bursts, and instability of coal pillars.
Yiqing ZHAO +5 more
doaj +1 more source
Pore-fracture evolution and damage constitutive model of coals under hydro-mechanical coupling
Meitan kexue jishuThe evolution of pore-fracture structures in coal under high stress and high seepage pressure conditions is recognized as the fundamental cause of damage to its physical and mechanical properties. To ensure safe coal mining, the evolution characteristics
Jun WANG +6 more
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Lehigh Coal and Navigation Company Records - Item 378: Detail of Bearing Box, 40-Inch Wicket
, 1910 This schematic shows the standard detail plan of a bearing box, 40 inch wicket. The material of construction is cast iron. The drawing shows dimensions of the finished work.
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Lehigh Coal and Navigation Company Records - Item 375: Detail for Lower Bearing Box, 26-Inch Wicket
, 1910 This schematic shows the standard detail plan for a lower bearing box, 26 inch wicket. The material of construction is cast iron. The drawing shows the dimensions of the finished work.
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Investigation of spontaneous combustion of coal in a longwall panel
, 2014 31st Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2014 -- 6 October 2014 through 9 October 2014 -- 110055Spontaneous combustion of coal is pretty important especially for underground ...
Sivrikaya O., Ozdeniz H., Berberoglu S.
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, 1910 This schematic shows the detail plan of the lever and connections for a reverse mechanism of an engine at launch "Josiah White." It belonged to the Engineering Division of the Canal Department of the Lehigh Coal and Navigation Company.
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Ledger 1, Accounts Receivable Ledger, Coal, 1918 [PDF]
, 1918 The company was formed by Colonel Robert Dickie Hunter in 1888 in Erath County, Texas. Hunter also formed the company town of Thurber, named for H. K. Thurber, his business partner. The area reached peak development in the early 1900s, providing half the
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Applied SciencesPrecise monitoring of damage evolution in coal-rock mass during mining emerges as a paramount requirement for developing accurate early warning systems for coal burst hazards.
Changbin Wang +4 more
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