DU Tong-sheng
Abstract
From the perspective of qualitative analysis, the paper investigates the forms of roof caving after seam mining of close hard rock and hard coal, the calculation of coal pillar load and working face bearing pressure under different forms of roof caving.
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From the perspective of qualitative analysis, the paper investigates the forms of roof caving after seam mining of close hard rock and hard coal, the calculation of coal pillar load and working face bearing pressure under different forms of roof caving.
Key concepts: Roof, Hard coal, Mining engineering, Coal mining, Pillar, Geology, Coal, Problems in coal mining