Results 51 to 60 of about 1,774,538 (199)
Scientific ReportsStable underground tunnels and gas drainage boreholes are important guarantees for safe and efficient coal mining. The stability of these structures is closely related to the mechanical properties of coal and rock damage.
Jin Yan +3 more
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, 1930 This scrip is from the Coal Run Coal Company mine with a value of $1.https://scholarworks.moreheadstate.edu/kilgore_scrip_collection/1033/thumbnail ...
Coal Run Coal Company
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Floor Damage Evolution in Coal Mine Reservoirs
WaterAddressing the severe risks of floor instability and leakage in underground coal mine reservoirs in Western China under coupled mining and hydraulic pressures, this study developed a fully coupled stress-damage-seepage numerical model. Incorporating rock heterogeneity based on the geological conditions of the Shendong mining area, the model ...
Jinwang Zhang +4 more
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Lehigh Coal and Navigation Company Records - Item 736: Detail of Jag Bolt
, 1910 This schematic shows the detail plan of a jag bolt by the Engineering Division of the Coal Department of the Lehigh Coal and Navigation Company. The material used is soft steel.
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Experimental study and application of hydraulic fracturing in underlying coal seam
Meitan kexue jishuThe coalbed methane resource under goaf is rich, but has not been effectively developed for a long time. Hydraulic fracturing technology stands as an effective means to augment coalbed methane recovery.
Yongxin LU +7 more
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Coal and health in the Hunter: lessons from one valley for the world [PDF]
, 2015 Once an unquestioned source of economic prosperity, the damage caused by coal to people’s health, natural capital and the global climate has led to closer scrutiny of its impacts.
Fiona Armstrong
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Unloading damage mechanism and pore structure evolution characteristics of different coal and rocks
Geomechanics and Geophysics for Geo-Energy and Geo-ResourcesThe final macroscopic fracture of coal rocks is closely related to their internal microscopic structure and micro-defects. The continuous change of the microscopic structure of coal rocks is the main reason for the change of the macroscopic mechanical ...
Wentao Xu +3 more
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Energies, 2020 The pore and fracture structure of coal is the main factor that affects the storage and seepage capacity of coalbed methane. The damage of coal structure can improve the gas permeability of coalbed methane.
Hewan Li +4 more
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, 1910 This schematic shows the detail plan of elevation block for supporting a third rail by the Engineering Division of the Coal Department of the Lehigh Coal and Navigation Company. The material used is yellow pine.
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Meitan kexue jishuIn order to explore the energy evolution law and damage evolution characteristics of coal and rock mass in the process of deformation and failure under different water content, the uniaxial compression test of coal and rock mass in Shuangma No.1 Coal ...
Yongjiang YU +4 more
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