Results 71 to 80 of about 6,644,658 (260)
Evaluation of Mitigation for Safety Concerns on Low-Volume, Unpaved Rural Roads, 2013. [PDF]
, 2013 The Institute for Transportation (InTrans) at Iowa State University completed work on an in-depth study of crash history on lowvolume, rural roads in Iowa in December 2010.
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Energy Science &Engineering, EarlyView.This study addresses hard roof coal seam conditions by optimizing key stratum blasting‐cutting parameters through theoretical analysis, numerical simulation, and field tests. It proposes calculation methods for blast hole spacing and delay timing based on stress wave theory, controlling roadway deformation within 35 mm, thereby enhancing resource ...
Qiong Liu, Duanxiang Fu, Hongbin Li
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Coupling support technique for coal roadway under double gobs in close coal seams
Energy Science & EngineeringIn the process of lower coal roadway support under double gobs in close coal seams, there are problems such as the whole destruction of the lower coal seam and the intermediate strata, the thin roof of the lower coal roadway with the smaller support ...
Xiaoyu Wu +4 more
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Meikuang Anquan, 2020 In view of the problem that the surrounding rock is disturbed severely and the pressure relief deformation is difficult to control in the support technology of pressure relief hole of deep high-stress roadway, this paper takes Beijing Changgouyu Mine as
WANG Jie, REN Jie
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Energy Science &Engineering, EarlyView.As the sublevel height increases, the top‐coal recovery amount gradually increases, but both the top‐coal recovery rate and the thickened top‐coal recovery rate show a downward trend, and the decline in the top‐coal recovery rate is gradually increasing. The comparison indicates that the optimal sublevel height is 20 m.
Hongsheng Tu +4 more
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Frontiers in Earth ScienceChina’s coal mines are mainly underground mines, and a large number of roadways have to be excavated underground. It is of great significance for coal mine production to adopt safe and reasonable roadway support methods.
Wanwei Fang +7 more
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Roadway Safety Institute: Human-Centered Solutions to Advance Roadway Safety 2013-2015
, 2016 This biennial report highlights research, education, and technology transfer activities by RSI from 2013 to 2015 and includes a summary of research projects.Roadway Safety Institute. (2016).
Roadway Safety Institute
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Energy Science &Engineering, EarlyView.This study on close coal seams shows that multi‐seam mining increases the height of the fractured zone from approximately 26 m (single upper‐seam mining) to about 49 m. When the lower seam is mined after the extraction of the upper seam, the heights of both the caved zone and the fractured zone increase by approximately two times.
Xiaoyu Wu +4 more
wiley +1 more source
Roadway Safety Institute: Summary Report 2013-2019
, 2019 This summary report highlights Roadway Safety Institute (RSI) research, education, and technology transfer activities from 2013 to 2019 and includes a summary of research projects.
Roadway Safety Institute
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International Journal of Climatology, EarlyView.Conceptual hydroclimatic pathway linking the concurrent negative North Atlantic Oscillation (NAO) phase and weak La Niña conditions to extreme February rainfall and flash flooding in Northwest Africa. ABSTRACT The winter of 2025–2026 in Morocco exhibited a rapid hydroclimatic transition from prolonged drought to widespread flooding, representing an ...
Afshin Amiri +2 more
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