Abstract: In the case of caving mining method,the ore rock mass drawn down has various shapes due to many influencing factors.It is difficult to predict exactly these shapes by means of a common mathematic model.A function linkage neutral network is introduced that is able to predict exactly the shape of ore rock mass drawn down,thus providing the possibility to reduce ore depletion.The predicted shape of ore rock mass conforms basically with the result from test.Besides,the network is also highly reliable and easily practicable.