Aiming at the surface subsidence prediction assessment in the mining areas

this paper took the secondary rigidity and gentle coal layer for an example

and analyzed the stability of probability function model.The result indicates that the model has a good stability

and satisfies the precision demands for prediction assessment.Thus

we can use it in surface subsidence prediction of the secondary rigidity and gentle coal layer.Among the coal stratum angel

thickness

depth and the synthetic evaluation factor

the sensitivity of the synthetic evaluation factor is the greatest

and the factor is the main control parameter.