Inner dumping covering height and repeated stripping depth of adjacent mining area in surface coal mines
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Abstract:
Features and calculation principles of inner dumping haul distances for various types of inner dumping covering are analyzed, mathematical modes about inner dumping covering height and repeated stripping depth are set up, and some general calculation formulas and feasible criteria are given. Taking Heidaigou surface coal mine as an example, we adopt a method of expense compensation to determine the optimal inner dumping covering height, and use the minimum repeated stripping ratio to determine the best repeated stripping depth. Results show that inner dumping covering height and repeated stripping depth must be determined at the same time, and the mathematical modes established by the method of expense compensation are not only simple but reliable. In addition, the research results can provide reference for the production of adjacent mining area in surface coal mines.
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Supported by National Natural Science Foundation of China(51204104).
