Study on the mathematical mode of mine workings advance direct cost, Optimal design and elect position of mine workings based on this mode. Search for the best economic benefit.
研究了井巷掘进直接成本数学模式，以此进行井巷位置的优化设计和选择，以求达到最佳经济效益。
Study on the mathematical mode of mine workings advance direct cost, Optimal design and elect position of mine workings based on this mode. Search for the best economic benefit.
研究了井巷掘进直接成本数学模式，以此进行井巷位置的优化设计和选择，以求达到最佳经济效益。
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