Land Ecological Risk Evaluation in Coal Mining Based on the Improved Relative Risk Model

Ecological risk evaluation of coal mining areas is the basis of ecological restoration. This paper introduces the mining coefficient and Analytic Hierarchy Process (AHP) method to improve the Relative Risk Model. The ecological risks of four land types caused by different mining activities in Yulin Huojitu Mine are analyzed based on this improved model. The results show that higher technical efficiency can lead to greater possibility of ecological risk; larger area of a single type can result in higher ecological risk level; the distribution extent of the risk is positively correlated with the relative risk value. This paper suggests that the high-level no-enterprises-difference ecological compensation and environmental responsibility standards should be developed corresponding to the land damage extent and ecological restoration requirements.(1)