... maintenance of flooded field mining problems A. Grigoryev Research Institute «FGUP VIOGEM», Belgorod, Russian Federation ABSTRACT: This paper examines mining of a flooded deposit safeguarded by a roof pillar using traditional mining methods and by hydraulic borehole mining. The ratio of ore extraction...

... of under- ground coal mines of the country is relatively poor, mainly due to a lack of mechanization. Underground mining of a thick coal seam, by to- tal extraction of the whole seam in a single pass, has always had the edge over multi-pass working, due to favourable economics and safety. Mining conditions...

... ABSTRACT ABSTRACT: Outcrop-scale directional roughness profiles can be extracted from photogrammetric or laser scanner point clouds using a straightforward five step procedure consisting of: 1) calculation of the dip direction and magnitude for use as a geologically significant reference...

...1 INTRODUCTION Block caving mining is characterized by caving and extraction of a massive volume of ore which translates into a formation of major surface depression or subsidence zone directly above and in the vicinity of the mining operations (see Fig. 1). The block caving induced subsidence may...