Experimental Study On Microporous Prominent Characteristic Of Prominent Coal And Non-prominent Coal

With increasing depth of mining, coal and gas outburst phenomenon will also increasing,so how to prevent and control the coal and gas outburst is that we had to face a severe test. With the pore structure of coal further studies, we found that the pore structure of coal have a great impact to gas storage capacity and permeability, especially micro and pico Kong to accounted for a large surface area of the coal. So coal-depth study to microscopic pore structure, not only explanation occurrence mechanism of gas in the coal, and have great significance to Proven coal and gas outburst phenomenon.Based on the different mine coal samples of different industrial analysis, draw methane emission rate and consistent coefficient of different coal samples, Preliminary determination the prominence of coal samples. Through low-temperature nitrogen adsorption experiment, obtained adsorption isotherm, compared the different of adsorption of outburst coal and non-coal prominent. Through Langmuir, HK and other methods to analyses the different of microscopic pore characteristics of outburst coal and non-coal prominent specific surface area, Pore volume, pore size distribution. Final results affect of the microscopic pore characteristics of coal to prominent and non-prominent.Through experimental research results:Outburst Coal microporous surface area greater than non-prominent coal; outburst coal microporous adsorption significantly greater than non-prominent coal in very low relative pressure; through HK equation to calculate the pore size distribution no significant differences of outburst coal and non-coal prominent; through DA equation to calculate the outburst coal pore volume was significantly larger than non-prominent coal.