直接原因

It even results in geologic hazard;for the mine geologic hazard,the background of physiognomy is the potential factor,while the irrational exploitation is the magistral factor.

矿山地质发生，地质地貌背景是诱发潜在因素，不合理开采方法是诱发主导因素，雨和水文条件是激发难发生直接原因。