Results 131 to 140 of about 46,400 (239)

Applicability of satellite remote sensing for detection and monitoring of coal strip mining activities [PDF]

The author has identified the following significant results. Large areas covered by orbital photography allows the user to estimate the acreage of strip mining activity from a few frames.
Brooks, R. L., Parra, C. G.
core   +1 more source

Producers versus Profiteers: The Politics of Class in Newfoundland during the First World War [PDF]

, 2011
During the First World War a widespread public impression that merchants were taking advantage of the conflict to extract excessive profits became a major issue in Newfoundland politics, and a cause of widespread public discontent.
O'Brien, Mike
core   +1 more source

English for Study and Work [PDF]

, 2015
Подано всі види діяльності студентів з вивчення англійської мови, спрямовані на розвиток мовної поведінки, необхідної для ефективного спілкування в академічному та професійному середовищах. Містить завдання і ситуації, типові
Зуенок, И. И., Зуенок, Ирина Ивановна, Зуєнок, І. І., Зуєнок, Ірина Іванівна, Кострицкая, С. И., Кострицкая, Светлана Ивановна, Кострицька, С. І., Кострицька, Світлана Іванівна, Поперечна, Н. В., Поперечна, Неллі Василівна, Поперечная, Н. В., Поперечная, Неллі Василівна, Швец, Е. Д., Швец, Елена Дмитриевна, Швець, О. Д., Швець, Олена Дмитрівна   +15 more
core   +2 more sources

Study on the influence of fracture geometry characteristics on the shear behaviors of fractured rock mass

International Journal of Coal Science & Technology
The shear behavior of fractured rock masses critically influences engineering stability, particularly in slope engineering. Overcoming limitations of conventional preparation methods, this study utilizes sand-powder 3D printing to fabricate rock-like ...
Chaolei Wu, Lishuai Jiang, Yang Li, Kefang Tao, Mingtao Gao, Xin Yang, Jiaming Liu   +6 more
doaj   +1 more source

Analysis of Blasting Fragmentation Characteristics in Open-Pit Coal Mine

Meikuang Anquan, 2020
The distribution of blasting fragmentation in open pit coal mines is an important factor influencing the efficiency of resource mining. To clarify the distribution characteristics of coal rock mass under blasting, we use a Split Hopkinson Pressure Bar (SHPB) test system to perform specimen failure test under impact load, and use direct sieving method ...
openaire   +1 more source

The Mining Industries, 1899-1939: A Study of Output, Employment, and Productivity [PDF]

Harold Barger, Sam H. Schurr
core   +12 more sources

[Energy requirements of miners engaged in open-pit coal mining].

Voprosy pitaniia, 1988
It has been found that according to the value of daily energy consumption the coal miners engaged in open-cast mining should be referred to group III-IV of work intensity. The determining component of daily energy consumption is energy consumption during the working period the value of which depends on the character of working activity and duration of ...
G M, Pichkhadze, A E, Shalygin, Iu N, Zubtsov   +2 more
openaire   +1 more source

Application of EREP imagery to fracture-related mine safety hazards in coal mining and mining-environmental problems in Indiana [PDF]

The author has identified the following significant results. This investigation evaluated the applicability of a variety of sensor types, formats, and resolution capabilities to the study of both fuel and nonfuel mined lands.
Amato, R. V., Martin, K. R., Powell, R. L., Russell, O. R., Wier, C. E.   +4 more
core   +1 more source

Coal Handling Operational Risk Management: Stripped Overburden Transport in Brown Coal Open Pit Mines

Acta Montanistica Slovaca, 2020
Vanek, Michal, Fidalgo Valverde, Gregorio, Cerny, Igor, Hudecek, Vlastimil   +3 more
openaire   +3 more sources

Optimization study on transverse mining zoning during the capacity expansion stage of nearly horizontal open-pit coal mines. [PDF]

Sci Rep
Wen Y, Song Z, Su Q, Liu Z, Wu C, Zhang L.   +5 more
europepmc   +1 more source