基于Apriori算法的盘江矿区煤与瓦斯突出特征研究OA北大核心CSTPCD

In order to reveal the occurrence law of coal and gas outburst disaster in Panjiang Mining area and improve the targeted work of gas prevention and control,the gas geological parameters of 37 coal and gas outburst accident points in Panjiang Mining Area were statistically analyzed according to the principle and method of Apriori algorithm.Data mining experiments are carried out on binomial association rules with minimum support of 40%and minimum confidence of 75%.The results show the following.The results show that:coal seam gas pressure(1-2 MPa)and buried depth(200-400 m),coal thickness(2-4 m)and coal initial gas release speed(≥15 mmHg),coal thickness(2-4 m)and coal thickness variation coefficient(≤0.2),mudstone thickness(≤5 m)and wall rock strength coefficient(≥2)are strongly correlated parameter combination types,and the coal and gas outburst sites in Panjiang Mining Area show the typical characteristics of shallow burial depth,high gas pressure,thick coal seam and high strength of sur-rounding rock;under special conditions of shallow mountain burial depth(200-400 m),the original ground stress of coal seam is of-ten not large,high gas pressure is the main factor affecting coal and gas outburst,and the gas pressure of coal seam generally reaches 1-2 MPa;the increase of coal thickness and the high initial velocity of gas release reflect that the coal structure has been too strongly damaged,and the local development of structural coal with coal and gas outburst tendency and the small variation coefficient of coal thickness indicates that the failure form of coal seam is not characterized by local variation of coal seam,but may exist in the form of coal structure failure characterized by stratified structural coal;in the case that the strong rock strata such as the top and bottom sand-stone of coal seam are generally thick,the dynamic load conditions generated by the mining disturbance of the high strength sand-stone roof of coal seam are superimposed to form the strong stress field conditions of coal and gas outburst;high gas pressure,struc-tural coal and roof surrounding rock characteristics are the main factors affecting coal and gas outburst in Panjiang Mining Area.In the process of coal mining,gas pressure should be taken as the main parameter index,and the characteristics of structural coal and roof lithology should be combined to predict and control coal seam outburst.