It is necessary to study the sedimentary microfacies and reservoir characteristics of the stable mineral bearing strata in Dongxin area to further explore the oil and gas reserve of the target zone.

In the system,rock integrality coefficients are used as input variables and stability of pillar and possibility of partial failure of pillar are used as two output variables.

In view of underground mining,an ore-rock stability evaluation was taken combining the fuzzy-grey-element,on the parameters that are capable to reflect ore-rock stability.