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Integrated Exploration Technology in Deep-buried Ultra-thick Coal Seam Fully Mechanized Caving Mining Overburden Failure Height
Author(s): 
Pages: 26-30
Year: Issue:  7
Journal: Coal Geology of China

Keyword:  fully mechanized caving miningoverburden failure heightexploration technologyBinchang mining area;
Abstract:  The coal mining in the Binchang mining area is seriously threatened by the roof ultra-thick Cretaceous Luohe Formation aquifer, while one of the most critical parameters is overburden failure height. Surface drilling or underground packer permeability test are often used previously, measured failure height/mining thickness ratio is 12~13 times, that is not tally with actual revealed data. Tak-ing the Dafosi coalmine in Binchang mining area as a test mine, using integrated exploration technologies of surface drilling borehole leakage measurement, borehole water table observation, infrared borehole imaging, surface water long-term observation, numerical sim-ulation etc., combined with working face water inflow analysis, carried out integrated working face overburden failure height study, and obtained correct results, maximum failure height/mining thickness ratio can be 26.98 times as high. This overburden failure height inte-grated exploration technology can provide reference for the design of exploration scheme of coalmines under similar conditions.
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