Determination of production capacity for open-pit coal mines under uncertainty: A model based on economies of scale.

As shown in Fig 1 , when the production scale reaches Q E 1 or Q E 2 , the enterprise breaks even; when it exceeds Q E 2 , the enterprise begins to lose money; when the production scale is between Q E 1 and Q B , the scale benefit of the enterprise increases, meaning income increases more than production scale; when the production scale exceeds Q B , the income of enterprise-scale shows a decreasing trend.

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