Evaluation on development effect of circular economy in coal enterprise based on grey relational grade

It is inevitable for coal enterprise to develop circular economy to achieve sustainable development. So the problem of how to measure the development effect of circular economy is proposed to us. The evaluation factor system of circular economic development effect in coal enterprise is determined first. From the basic theory of grey system, combined with the circular economy development characteristics of coal enterprise, the effect evaluation model of grey relational grade on circular economy development in coal enterprise is established secondly. And then the effect evaluation model is applied to examples which verify the rationality and feasibility of the effect evaluation model. This provides a certain degree of reference for managers to make decision develop circular economy.