Distributive feature of f value of different coal body structure coal

Abstract：On the basis of 118 solidity coefficients determined (f value) of different coal body structure type coal in the coal seam C_13-1of Huainan coal field, the paper analyses the distributive feature and statistical regularity of f value of different coal structure type coal. It shows the mutual relation of coal body breakage and f value, and proposes that f value is regarded as the classification quota of hard coal and tectonic soft coal.

Keyword：coals solidity coefficient (f value) ; mean of common range; coal body structure type coal; tectonic soft coal.;