Collecting More Preferably Surface Image From Coal And Analysis The Structure Features Of Pore Fissures

Coal hole fissure is a space in the coal seam gas storage，the adsorption of gas themolecular and coal molecules in the hole fracture has a direct contact with the gasoutburst.In this paper，through analysis coal from Songzao，Nantong and Pingdingshanby "The polarized analysis software system CF-2000P"，improved method of acquiringimages and compared to traditional methods，get the following conclusion:1) Fundamentally different points of the traditional program and optimization programis the illumination intensity， Properties of light， illumination angle， the coalsample surface reflection light amount.When we use "the polarized analysissoftware system CF-2000P" analysis of coal-rock hole fissures，the particles andTolerance selected accurately determine to decision the accuracy of the data，for thepicture’s color mode is RGB， you should make a picture of the gray histogrampresents the distribution of "Twin Peaks"-like.A large number of experiments showthat the porosity of the optimization program is always less than the traditionalprogram，the picture hole fissures on traditional programs and non-porous fracturedlightness similar，which cause pixels concentrated in the traditional programhistogram was unimodal shape， there is no obvious critical point.2) Nantong coal hole fractured optimization program is the most fully，Songzao andthe Pingdingshan coal hole fissure relatively inadequate development，the Songzaocoal weathering relatively more serious， this data obtained conclusionscoincide.Each mine has the same characteristics， porosity have a certainrelationship with the fractured radius of the largest hole，the greater the porositycorresponding to the largest hole fractured radius may be greater，and the greaterthe porosity corresponding to the average pore fractured radius may be greater，butthe change in volatility between them does not vary between the radius of thelargest hole fractured fluctuation，the greater the porosity corresponding to the totalnumber of holes fractured more.3) The hole fracture characteristics of briquette molding pressure surface is directlylinked to the particle size category，from20to40mesh to100mesh particle sizecategory，holes fractured particle size of each smaller level， the correspondingchange about double the total number of holes fissures，with the hole fracturedparticle diameter becomes smaller， the porosity， the maximum pore radius of fissures， most hole fractured radius and an average pore fractured radiuscorresponding to each other becomes small.Briquette hole fractured structure of theconfining surface characteristics of certain degree of relationships and particle sizecategory，generally showed a decreasing trend as the particle size decreasesporosity fractured radius of the largest pore，while porosity become smaller morelinear.The briquette hole fissures structural features and has a direct connection tothe particle size category，but the structural characteristics of the raw coal holefissure is a manifestation of its own physical properties，the size of the porosityhave no direct relationship with other elements.