نتایج جستجو برای: surface mining

تعداد نتایج: 719231  

2015
Michael P. Strager Jacquelyn M. Strager Jeffrey S. Evans Judy K. Dunscomb Brad J. Kreps Aaron E. Maxwell Juan A. Añel

Predicting the locations of future surface coal mining in Appalachia is challenging for a number of reasons. Economic and regulatory factors impact the coal mining industry and forecasts of future coal production do not specifically predict changes in location of future coal production. With the potential environmental impacts from surface coal mining, prediction of the location of future activ...

2008
Linlin Ge Hsing-Chung Chang Alex Ng Chris Rizos

Land surface deformation can be caused by underground mining activities. The maximum subsidence normally occurs directly above the location of the excavation of the coal seam. In the case where the longwall mining technique is applied, the magnitude and shape of the subsidence bowl are constrained by the longwall structure (pillar). This paper describes the use of satellite radar interferometry...

The prerequisite of maintaining an efficient and safe mining operation is the proper design of a mine by considering all aspects. The first step in a coal mine design is a realistic geometrical modelling of the coal seam(s). The structural features such as faults and folding must be reliably implemented in 3D seam models. Upon having a consistent seam model, the attributes such as calorific val...

Journal: :Journal of the Mining and Metallurgical Institute of Japan 1970

Journal: :Journal American Society of Mining and Reclamation 1996

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