Doing so depends on understanding the granular structure of the rock it is trapped in.

要做到这点，人们需要对某些岩石的颗粒结构有所了解，而这些岩石是有石油困于其中的。分。

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For rock blocks with different strengths, the curves of grading of granular have strong similarity and relativity and can be described by polynomial.

对于强度不同的岩块，其级配曲线具有很强的相似性和相关性，并可用二次多项式进行描述。

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