Ground-surface Environment Damage Evaluation of the Subsidence Areas from the Coal Mining with Filing

摘要

The comprehensive evaluation index system of ground-surface environment damage from coal mining subsidence areas was established based on fuzzy mathematics and comprehensive evaluation methods.The empirical research was developed as an example of the subsidence area of Anhui Wugou coal mine from mining filing.The results show that soil environment of slope collapse in research areas is only minor damage,and the destruction level of surface facilities and surface subsidence range stay low.Collapse regional center is seasonal hydrous area,and the depth of subsidence area is shallow.Coal mining has little effect on the soil moisture retention capacity mainly because of slightly soil structure damage.Ammonium nitrogen contents in soil have slight and slow downward trend.Although available phosphorus and available potassium contents is fluctuations,but that remains at current levels in general.The possibility of soil erosion is very small,which the cultivation factors play an important role.