Coal mining in remote mountainous district mainly on drift of coalpit, and its influence on surface deformation has already been attention.
偏远山区矿山开采多以小窑掘进为主，其对地表变形的影响已引起人们的重视。
Coal mining in remote mountainous district mainly on drift of coalpit, and its influence on surface deformation has already been attention.
偏远山区矿山开采多以小窑掘进为主，其对地表变形的影响已引起人们的重视。
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