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Effects of Changing Cost and Price on Final Pit of Openpit Coal Mine
WANG Qing ， XU Xiaochuan ， GU Xiaowei ， ZHENG Youyi
2013, 34 (5):
712-714.
DOI: -
Based on the criterion of economic strapping ratio， surface model and columnar seam model， CoalDesign software system was used to optimize the final pit of an openpit coal mine in the Inner Mongolia. Some final pits were obtained under different technical and economic conditions. The case of final pit changing with cost and price was analysed. In practice， taking current technical and economic parameters as benchmark， when the price of raw coal increased by 10%， it resulted in raw coal yield increasing by 79%， stripped rock volume increasing by 115%， the stripped quaternary layer volume increasing by 6%， the boundary total volume increasing by 95% and the profit value increasing by 238% without considering infrastructure investment. When the cost of mining lowered by 10%， it resulted in raw coal yield increasing by 84%， stripped rock volume increasing by 123%， the stripped quaternary layer volume increasing by 65%， the boundary total volume increasing by 102% and the profit value increasing by 245% without considering infrastructure investment. The result showed that the final pit is influenced by price and cost greatly. Boundary analyses had an important reference value to making good decisions.
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