Results 191 to 200 of about 353,530 (338)

3. The Economic Scene (1919-1939)

, 1958
Control over the processes of production was made more efficient by the application of the new techniques of scientific management, a concept which first achieved prominence in America.
Bloom, Robert L., Crapster, Basil L., Dunkelberger, Harold L., Glatfelter, Charles H., Mara, Richard T., Richardson, Norman E., Schubart, W. Richard   +6 more
core  

Improvements of Mining System and Installation at Meiji-Saga Coal Mine

, 1956
T Miyamoto
openalex   +2 more sources

Damage Characteristics and Parameter Sensitivity of Fracture Caverns Under Pneumatic Disturbances

Energy Science &Engineering, EarlyView.
ABSTRACT In the construction process of abandoned mine compressed air energy storage projects, the presence and distribution of fractures within the rock mass significantly influence both the design and safe operation of the energy storage system. To investigate how initial fractures affect rock mass damage under pressure disturbances, a coupled model ...
Run Hu, Yuejin Zhou, Chaobin Zhu, Yunong Xu, Jichu Chen   +4 more
wiley   +1 more source

Rationalization of Coal Mining Industry

, 1961
Yoshiaki Taguchi
openalex   +2 more sources

Modeling and Experimentation of Fragmented Coal Porosity Evolution Under Stress, Temperature, and Moisture

Energy Science &Engineering, EarlyView.
Based on actual goaf conditions, a porosity evolution model considering the superimposed effects of stress–temperature–moisture interactions was developed and experimentally validated using a confined fractured coal mass low‐temperature oxidation testing system simulating goaf scenarios.
Boning Jiang, Yuexia Chen, Tingxiang Chu, Chunxi Wu, Lei Li, Tianru Zhu, Xi Zhang   +6 more
wiley   +1 more source

Coal mining as a risk factor for tuberculosis - Commodity or circumstance? [PDF]

S Afr J Infect Dis
Singh N, Irusen EM.
europepmc   +1 more source

Automatic interpretation of MSS-LANDSAT data applied to coal refuse site studies in southern Santa Catarina State, Brazil [PDF]

The coal mining district in southeastern Santa Catarina State is considered one of the most polluted areas of Brazil. The author has identified significant preliminary results on the application of MSS-LANDSAT digital data to monitor the coal refuse ...
Kux, H. J. H., Parada, N. D. J., Valeriano, D. D. M.   +2 more
core   +1 more source

Prospect of the Coal Mining Industry

, 1961
Hiroshi Saku
openalex   +2 more sources

Cost to mine coal in New Mexico, 1977; Mining cost estimates [PDF]

, 1976
David E. Tabet, Steve J. Frost, Frank Ε. Kottlowski, Paul Weir Company Paul Weir Company   +3 more
openalex   +1 more source

Porosity Optimization Model to Characterize Gas Seepage Behavior in Longwall Mining Gobs: An Application Case and Simulation Analysis

Energy Science &Engineering, EarlyView.
ABSTRACT The degree of fragmentation of coal rock determines the porosity distribution of goaf porous media, which can be expressed using empirical formulas. However, this method fails in regions with nonuniform caving, dynamic disturbances, or deep high‐stress conditions. Therefore, this study developed a porosity optimization model comprising A and B
Yipeng Song, Zhongshan Wang, Yueping Qin
wiley   +1 more source