Abstract: in order to study the nining ifluence scope under the subcrtical extraction conditon.based on the suberitical extraction in Lizhail Mine affected to the partial ivil buildings in Shenzuil Vllage of Mazhai Town a conception of " adjustment coeicent of the suberitial extracion infuence scoe" was provide.Waith the probability inegral method obtained applied to predict the parameters and the ill subsidence ceicient appied to comprehensively caculate the infuence s:ope of the subcrtical extraction,the " adjustment coefficient of the subcritical extraction influence scope" applied to adjust the influence scope of the mining.The study results showed that under the suocritical extacion condtfon.the mining infuence scope predicted with the sofware of the probatilit integral method could be basicall fied to the sie actual invesigation condt on.Under the sub.ritial extracion condton,the mining infuence scope calculated with the boundary angle would be larger than the actualcondition.Lccording to the prediction with the probatilty integral method and in combination with the ful ubsidence coeficient, the mining infuence scoe under the subcritical extraction condition could be well calculated.