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该文探讨了河下开采的必要性，并对河下煤体的开采方法进行了选择，确定了条带法开采的采宽与留宽尺寸，指出了河下采煤应注意的问题
This paper discusses the necessity of mining under the river, and selects the methods of mining the river under the coal mining, determines the mining width and width of the strip mining method, and points out the problems that should be paid attention to under the coal mining