Abstract：For research ground surface movement law and prediction parameters obtaining method under the condition of super-subcritical extraction in deep mining,the prediction parameters recognition method of surface movement surveying monument was analyzed and compared in coal area. Based on a probability integral and a probability density function,the surface fitting function models of super sub-critical extraction along some directions were constructed for unconventional surveying monuments. For first 12303 panel of three mining sections in Yunjialing colliery example,surface mining prediction parameters were determined by means of surface fitting. The results of this research indicate that under the condition of unconventional surveying monuments layout the method of surface fitting is adapted to the geological condition of a coal mine. Moreover,surface subsidence factor is 0. 12,main influence angle tangent value is 0. 5 and 1. 2 along strike and diphead direction separately. Furthermore,inflexion point offsets alone strike left and right are 0. 46 H0 and 0. 2 H0 separately. However,the offset displacement of maximum subsidence point is very little along the diphead direction. It is of reference value to guide secure coal mining under structures and setting protective coal pillar in a coal area.

Keyword：deep mining;super sub-critical extraction;unconventional surveying monuments;mining subsidence;