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In the past decades,the intense excavation of coal resources in China has induced a series of severe waterrelated disasters or problems,such as water burst accidents,severe groundwater depletion and contamination.All of these problems were caused by the structural changes of roof rocks or bed rocks induced by coal excavation.The structure of collapsed roof rocks is generally classified into three zones:falling zone,cracking
In the past decades, the intense excavation of coal resources in China has induced a series of severe water-related disasters or problems, such as water burst accidents, severe groundwater depletion and contamination. All of these problems were caused by the structural changes of roof rocks or bed rocks induced by coal excavation. structure of collapsed roof rocks is classified classified into three zones: falling zone, cracking