Results 41 to 50 of about 139,365 (154)

Formation of the Wink Sink, A Salt Dissolution and Collapse Feature, Winkler County, Texas [PDF]

, 1982
UT ...
Baumgardner, Jr., Robert W., Goldstein, Arthur G., Hoadley, Ann D.   +2 more
core   +1 more source

Experimental study on the strain energy evolution mechanism of thick and hard sandstone roof in Xinjiang Mining Area

Heliyon
For understanding the mechanical performance and strain energy evolution mechanism of thick hard roof sandstone samples, a sequence of uniaxial compression trials with acoustic emission (AE) monitoring were carried out.
Dongdong Qin, Zechao Chang, Ze Xia
doaj   +1 more source

Research on the causal mechanism of a rock burst accident in a longwall roadway and its prevention measures

Scientific Reports, 2023
Based on the disaster characteristics and the geo-conditions at the scene, in this study, the occurrence mechanism of a serious rock burst accident that occurred in the Tangshan Coal Mine, China, was analysed.
Ying Chen, Zikai Zhang, Chen Cao, Shiji Bao, Shuai Wang, Guangyuan Xu   +5 more
doaj   +1 more source

Don’t Talk About Your Fallout Shelter: Civilian Perceptions of Threat and Structural Responses during the Cold War in Regina, Saskatchewan between 1958 and 1963 [PDF]

, 2019
During the Cold War, the Canadian government initiated a civil defence campaign urging private citizens to construct shelters to protect themselves from the effects of nuclear fallout.
Mushynsky, Julie
core   +1 more source

Overview of technologies for constructing the facilities at the Dniester pumped storage power station [PDF]

, 2019
Purpose. Perform an overview of the construction technologies and substantiate the effectiveness of the Ukrainian experience in building a pumped storage power station (PSPS) on the Dniester River in difficult engineering-geological conditions with the ...
Horbatiuk, Yu, Parinov, V, Petrenko, V, Radkevych, A, Tiutkin, O   +4 more
core   +1 more source

Characteristics of mine pressure and roof disaster prevention and control technology on hard and thick roof of working face

Meitan kexue jishu
Mine pressure appears extremely strong during mining in hard and thick roof working faces. The prevention and control of this type of roof disaster has always been a problem that has plagued the safe and efficient production of working faces in my ...
Gang XU, Zhen ZHANG, Zhengjie LI, Yanjun FENG, Chunhui ZHANG, Jisheng XUE, Qianjin LIU, Xingyu LIN, Rongshan MA   +8 more
doaj   +1 more source

Breaking mechanism of hard thick roof during the life cycle of large mining height working face

Meitan kexue jishu
The hard and thick roof is the force source layer of the large mining height working face. During the life cycle of different large mining height working face, the boundary conditions of the roof are different, which leads to the breaking pattern of the ...
Zhaoyuan LEI, Feng LI, Zikui ZHAO, Lei LI, Xingli HUANG   +4 more
doaj   +1 more source

3D Stretchable Arch Ribbon Array Fabricated via Grayscale Lithography. [PDF]

, 2016
Microstructures with flexible and stretchable properties display tremendous potential applications including integrated systems, wearable devices and bio-sensor electronics.
Deng, Ningqin, MABOUDIAN, Roya, Mohammad, Mohammad, Pang, Yu, Ren, Tian-Ling, Shavezipur, Mohammad, Shu, Yi, Wang, Xuefeng, Yang, Yi, Zhao, Haiming   +9 more
core   +2 more sources

Lateral Structure of Multi-Layer Thick Hard Roofs and Hydraulic Roof-Cutting Pressure Relief in Xiao Jihan Mine

Applied Sciences
This study aims to address the pronounced stress concentration in roadway-surrounding rock under conditions of multiple thick and hard roof strata at Xiao jihan coal mine, China.
Hui Liu, Lichuang Chen, Xufeng Wang, Hui Gao, Chenlong Qian, Xuyang Chen   +5 more
doaj   +1 more source

Soft-Shelled Turtles (Trionychidae) from the Bissekty formation (Upper Cretaceous: Turonian) of Uzbekistan: Skull-Based Taxa and Probable Skull-Shell Associations [PDF]

, 2013
In this paper we describe previously unpublished trionychid turtle material, consisting of skull fragments, from the Late Cretaceous (late Turonian) Bissekty Formation of the Dzharakuduk locality in Uzbekistan.
Danilov, Igor G., Vitek, Natasha S.
core   +1 more source