Coal mining under
thick loose strata in North China leads to ground
subsidence, which is a natural result of hydromechanical coupling
(fluid flow coupled with solid deformation). Therefore, the land surrounding
the mining areas is greatly damaged. In this study, the combined weight
(CW) method and the fuzzy matter-element analysis (FMEA) method were
used to analyze and evaluate the control effect of subsiding land.
Overall, 20 sets of geological samples were collected from this area.
The influencing factors and the corresponding weights for the control
effect of subsiding land were comprehensively analyzed, and an FMEA
model was built to predict and verify the results. The results showed
that (1) the two evaluation indicators with the most significant impact
on land reclamation were the degree of integration and the economic
and social benefits and (2) among the 20 sets of samples selected,
the predicted conclusions of 17 sets were consistent with the actual
engineering situations, which led to an accuracy of 85%. In other
words, the CW-FMEA model showed good reliability for evaluating the
control effect of subsiding land, which can provide scientific references
for control and quality evaluations of land subsidence due to coal
mining.