ENDOSCOPIC SUBMUCOSAL DISSECTION: AN UPDATE ON TOOLS AND ACCESSORIES



Recovery Technology of Bottom Coal in the Gob-Side Entry of Thick Coal Seam Based on Floor Heave Induced by Narrow Coal Pillar

To improve the resource recovery efficiency of mining face in thick coal seams, the correlation between deformation failure of bottom coal UPGRADED COLLAGEN in the gob-side entry and coal pillar width was analyzed by theoretical analysis, numerical calculation, and similar simulation experiments.The results showed that, when the coal pillar was str

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Evolution of the Upper Reaches of Fluvial Systems within the Area of the East European Plain Glaciated during MIS 6

The headwaters of fluvial systems on the East European Plain between the boundaries of the Marine Isotope Stage 2 (MIS 2) and MIS 6 glaciations evolved during the last 150,000 years.At least three main events of high surface runoff caused intensive erosion: at the end of MIS 6, at the end of MIS 2 and in the Middle Holocene.Erosion developed in the

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