Results 81 to 90 of about 739,679 (204)

Annual report of the inspection of coal mines and coal production, State of Kansas.

Report year ends Dec. 31.Mode of access: Internet.Continued by: Kansas. Mine Inspection Dept. Annual report of Coal Mine Inspection and Mine Rescue Departments.Continues: Kansas. Mine Inspection Dept.
Kansas. Mine Inspection Dept.
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Indianhead Mine, coal-shearing mine

, 2022
D.C.-1; Coal-shearing machine, locally built. Front view showing cut. Note guard over exposed section of cutter bar. Indianhead Strip Mine, Dakota Collieries Company, Zap, Mercer County, North Dakota. February 1948 - M. L.
Williams, M. L.
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Integrated geophysical exploration of water-rich abnormalities in coal mine roofs: Example from the 31 123-1 panel, Dongxia Coal Mine

AIP Advances
Water inrush problems in coal mines pose a serious threat to safe and efficient production. How to effectively predict the potential water bodies in abnormal roof and floor strata is the key to water control in coal mines.
Hongli Liu, Jie Chen, Genfa Yang, Keyin Guo, Yidong Li, Hongfeng Lv, Junyu Xu, Guozhi Da   +7 more
doaj   +1 more source

Instability mechanism of coal pillar in steeply dipping ultra-thick coal seam “segmented and stratified” combined mining

Meikuang Anquan
In order to solve the problems of frequent high energy microearthquakes and large roadway deformation in full-mechanized caving “segmented and stratified” combined mining in Yanbei Coal Mine with large dip angle and extra-thick coal seam, theoretical ...
Yong LIU, Yao YANG, Xiao WANG, Wenqiang WANG, Xuesong WU, Anye CAO, Zujun LU, Tao YANG, Zhanquan WEI   +8 more
doaj   +1 more source

Causes and control of coal mine bumps [PDF]

"Coal mine bumps involve the violent, rapid failure of coal and rock around a mine excavation. Deep coal mines with strong roof and floor rocks and high-stress conditions frequently experience face and rib bumps.

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Mechanical analysis of floor deformation and floor heave control technology for gob-side entry retaining in medium thick coal seam with shallow cover depth

Meitan kexue jishu
Gob-side entry retaining technology is of great significance to improve coal recovery rate, improve roadway stress environment and ensure mine safety and efficiency.
Chaochao YAN, Guoen ZHANG, Tong CHANG, Pengfei WANG, Tianping WANG, Changquan WU   +5 more
doaj   +1 more source

Mine pressure monitoring and data analysis of Shanjiaoshu Coal Mine

, 2016
The paper introduced general situation of a coal face in Shanjiaoshu Coal Mine and its mine pressure monitoring purpose, content and problems that need attention, and gave a scheme of mine pressure monitoring, collected and analyzed mine pressure data ...
ZHANG Yaoqiu, ZU Ziyin, WU Guiyi
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Failure mechanisms of sandstone subjected to cyclic loading considering stress amplitude effects

International Journal of Coal Science & Technology
In underground engineering fields, such as mining engineering, rocks are often subjected to cyclic loading, resulting in the deterioration of their mechanical properties, which poses a serious threat to engineering construction.
Qican Ran, Yunpei Liang, Quanle Zou, Zihan Chen, Jinfei Zhan, Liang Chen, Zhaopeng Wu, Tengfei Ma   +7 more
doaj   +1 more source

Research on spatial-temporal evolution of roof structure in shallow buried depth high-intensity mining working face

Meikuang Anquan
To reveal the structural evolution law of roof strata in shallow-buried depth working faces with high-intensity mining, this paper takes the 12-upper 302 working face of Buertai Coal Mine as the engineering background.
Zhengyi Yang, Taotao Du, Jun Cao, Yongliang Yang, Jianhui Ren, Xuanliang Li   +5 more
doaj   +1 more source

Canaries in the Coal Mine

Professional Case Management, 2021
openaire   +3 more sources