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此模型首先对矸石堆积的形状采取合理假设 ,建立了一个体积与坡道高度之间的微分方程 .在求解过程中用连续和离散相结合的方法 ,通过对出矸率在 7%— 1 0 %范围的值进行讨论 ,对问题 1得答案 :出矸率为 7%— 9%时 ,钱够用 ;出矸率为 1 0 %时 ,从第十八年开始钱就不够用 .对问题 2 ,在证明三个准则的基础上 ,得出了合理的年度征地方案并对不同出矸率及贷款情况 ,逐年计算出还款年数
In this model, we first make reasonable assumptions about the shape of the waste pile and establish a differential equation between the volume and the height of the ramps. By using a combination of continuous and discrete methods in the solution, % Of the value of the scope of the discussion on the answer to the question 1: the gangue rate of 7% - 9%, enough money; gangue rate of 10%, the money started from the eighteenth year is not enough. 2, On the basis of proving the three criteria, we draw a reasonable annual land acquisition plan and calculate the repayment year by year for different refuse rate and loan situation