scholarly journals Impact Assessment of Mining - and - Geological Factors of Kuzbass Coal Mines on the Level of Their Power Consumption

2016 ◽  
Author(s):  
Alla Zakharova ◽  
Irina Lobur ◽  
Nadezda Shauleva ◽  
Valeriy Borovtsov
Keyword(s):  
Power Consumption ◽  
Impact Assessment ◽  
Coal Mines ◽  
Geological Factors

scholarly journals Development of Interrelated Voltage Regulation System for Coal Mines Energy Efficiency Improving

2018 ◽  
Vol 41 ◽  
pp. 03013 ◽  
Author(s):  
Fedor Nepsha ◽  
Roman Belyaevsky
Keyword(s):  
Energy Efficiency ◽  
Power Consumption ◽  
Power Supply ◽  
Coal Mines ◽  
Voltage Regulation ◽  
Active Power ◽  
Regulation System ◽  
State Matrix ◽  
Voltage Level ◽  
Supply Systems

In this paper, the authors propose an algorithm for interrelated voltage regulation in the power supply system of coal mine which allows to provide a normative voltage level and to minimize the level of active power consumption. A feature of the proposed algorithm is a separate consideration of discrete and nondiscrete variables. Nondiscrete variables are represented as a state matrix. The optimization of nondiscrete variables is performed for each state. The algorithm chooses a state with the minimal active power consumption. The obtained values of discrete and nondiscrete variables are transferred in the form of control signals to voltage regulation devices. In this case, the periodicity of the switching is determined by the resource of the on-load tap-changing device. The use of this algorithm will theoretically allow increasing the energy efficiency of power supply systems of coal mines.

scholarly journals Geological factors of geodynamic effects manifestation in Japan coal mines

2013 ◽  
Vol 7 (2) ◽  
pp. 193-199
Author(s):  
V Savchyk ◽  
◽  
V Prikhodchenko ◽  
V Buzilo ◽  
◽  
...  
Keyword(s):  
Coal Mines ◽  
Geological Factors

scholarly journals Influence of geological factors on the manifestation and species composition geodynamic effects in coal mines of Poland

2015 ◽  
Vol 9 (1) ◽  
pp. 125-133
Author(s):  
V.O Rastsvietaiev ◽  
◽  
L.M Posunko ◽  
A.L Shyrin ◽  
S.S Zheglov ◽  
...  
Keyword(s):  
Species Composition ◽  
Coal Mines ◽  
Geological Factors

Air quality impact assessment of multiple open pit coal mines in northern Colombia

2012 ◽  
Vol 93 (1) ◽  
pp. 121-129 ◽  
Author(s):  
José I. Huertas ◽  
María E. Huertas ◽  
Sebastián Izquierdo ◽  
Enrique D. González
Keyword(s):  
Air Quality ◽  
Impact Assessment ◽  
Coal Mines ◽  
Open Pit

Sino-Japanese Business in China: The Luda Company, 1921–1937

1980 ◽  
Vol 39 (4) ◽  
pp. 711-727 ◽  
Author(s):  
Tim Wright
Keyword(s):  
Coal Mines ◽  
Foreign Company ◽  
Financial Success ◽  
Short Term ◽  
Fuel Supply ◽  
Foreign Companies ◽  
Company Policy ◽  
Geological Factors ◽  
Business In China

The weakening of Japan's position in China following the Washington Conference led to the establishment of the Sino-Japanese Luda Company to run the Zichuan coal mines, operated by the Japanese army since 1915. The inability of the Chinese promoters to raise sufficient funds for the company, however, allowed the Japanese investors the major say in company policy. As a Sino-foreign company, Luda enjoyed special privileges which were zealously upheld by the Japanese consuls. Though these practices eroded Chinese sovereignty, they did not make the company a financial success. This failure resulted partly from the Japanese investors' greater concern with their country's long-term fuel supply than with Luda's short-term profits; but this paper also stresses both the ways in which the Chinese, in their attempts to reassert China's sovereignty, harrassed and restricted privileged foreign companies, and the overriding importance of locational and geological factors in determining a mining company's success.

Sign in / Sign up

Export Citation Format

Share Document