Exploration on the enhance of gas pressure prediction accuracies in coal seam

Abstract：By using computer technology, through the study of linear, exponential, logarithmic, power and polynomial correlation analysis of gas coal seam pressure and buried depth in seven pairs of Huaibei coal mine, the best fitting in relation for the coal seam gas pressure with potential outbust to the depth of buried coal seam can be used to express with polynomials.Polynomial curve can express the law of the coal seam gas pressure changes objectively.Most of the coal mine gas pressure with the increase of burial depth increased, and the gas pressure increase difference in different depth range.In a small number of mines, the gas pressure come to fall with the increased depth of the coal seam buried when buried up to a certain depth.In maximum curvature site of polynomial curve, or in a gas pressure jumping changes regional within a pressure scope, coal and gas outburst is most likely to occur.

Keyword：coal seam;gas pressure;forecast accuracy;