Results 81 to 90 of about 1,774,538 (199)

Lehigh Coal and Navigation Company Records - Item 1426: Elevation and Sections of Standard Wooden Hinged Boat

, 1912
Full date of technical drawing: January 2, 1912. This schematic by the Lehigh Coal and Navigation Company Canal Department Engineering Division shows the plan for elevation and sections of a standard wooden hinged boat of 100 gross tons nominal capacity.

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Coal mining-induced composite damage to geological bodies and geological guarantee against damage reduction [PDF]

Objective and Background Coals have long served as a predominant energy source in China. With an increase in mining scale and intensity in recent years, the correlations between rocks, soils, hydrosphere, and ecological environment in coal mining areas ...
Qiang SUN, Xin HU, Enke HOU, Kai CHEN, Shijie SONG, Qingmin SHI, Shutao ZHOU, Shihao YUAN, Jishi GENG, Shuangming WANG, Shengquan WANG   +10 more
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Subsection amplification cyclic deterioration mechanism of creep damaged coal

Meitan kexue jishu
Under the excavation effects of deep coal and rock, obvious creep damage is produced under the action of high stress for a long time and the sudden destabilization of the creep-damaged coal body induces rock burst disaster under the mining action in ...
Yangyang LI, Shichuan ZHANG, Baotang SHEN, Yadong XU, Jinming DANG, Jiaqi HOU   +5 more
doaj   +1 more source

Lehigh Coal and Navigation Company Records - Item 6262: Layout for Terminal Tracks, Pockets, and Canal Facilities for Rail to Boat Coal Transfer: Dam number 5 near Siegfried

, 1922
This item includes both a map of the location plan and technical drawings of a conveyer system for rail-to-boat coal transfer near Siegfried (current day Cementon).

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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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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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Deformation mechanism and damage energy evolution of coal body under different gas pressures based on the energy principle

Scientific Reports
With increasing mining depth, the coal pillars of a coal mine will be in a stressful environment characterized by high gas pressures and unidirectional loading.
Yongjiang Yu, Xu Dong, Jiaming Liu, Zhiyuan Song, Zhiqiang Wu, Wenjing Guo   +5 more
doaj   +1 more source

Research on Determination of Coal Pillar Bearing Law and Width Based on Coal Damage Evolution

Meikuang Anquan, 2020
In order to solve the on-site problems of unclear coal pillar bearing law and difficult determination of reasonable width, this paper uses numerical simulation and on-site industrial tests to analyze the wall rock deformation law, coal pillar bearing property evolution law, the law of internal crack propagation and support control of coal pillar.
openaire   +1 more source

Lehigh Coal and Navigation Company Records - Item 371: Detail of Canal Boat Forgings

, 1909
This schematic shows the details of a canal boat and its forging. The material of construction is wrought iron. The drawing shows the details of a bow fender, stern iron, shoe iron and bumper iron.

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Lehigh Coal and Navigation Company Records - Item 398: Sketch Showing Arrangement of Dynamometer on Canal Boat for Towage Tests

, 1910
This schematic shows a sketch for the arrangement of a dynamometer on a canal boat for towage tests. It belonged to the Engineering Division of the Canal Department of the Lehigh Coal and Navigation Company.

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