Cai Yi
Abstract
The coal of Qingshan coal mine is complicated and steeply inclined coal,gas and grime popping out and the thickness of the coal change clearly.The caving technique for the complicated coal is difierent from the general coal.According to the practice of the Qingshan coal mine,the technique for caving the complicated and steeply inclined was introduced.
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The coal of Qingshan coal mine is complicated and steeply inclined coal,gas and grime popping out and the thickness of the coal change clearly.The caving technique for the complicated coal is difierent from the general coal.According to the practice of the Qingshan coal mine,the technique for caving the complicated and steeply inclined was introduced.
Key concepts: Coal, Mining engineering, Coal mining, Engineering, Geology, Petroleum engineering, Waste management