Dynamics Study Of Carbon Monoxide Of Coal Mine

The carbon monoxide is the index sign air for predicting spontaneous combustion in coal seams. But in recent years,it has been as a common phenomenon in medium-low rank coal seams that the content of carbon monoxide exceeds the standard of Law,and a great deal of prevention measure has been adopt, however the spontaneous combustion has never taken place in the coal seams. Then it results in a great deal of otiose economy losing for business enterprise, and hinders the normal safety production.In view of the phenomenon that carbon monoxide exceeds standard for a long time in DONG HUAN TUO coal mines, CUI JIA ZHAI coal mines etc,of KAILUAN Group Mining Corporation. 22 representative coal samples were collected from different coal seams and different places of 4 coal mines. The pore Structures, the adsorption quantity on different temperature and pressure and the proliferation quantity on normal temperature and pressure of carbon monoxide in coal seams were mensurated based on element analysis,industry analysis and petrographic analysis of coal samples.The carbon monoxide adsorption date on different temperature and pressure and proliferation date on normal temperature and pressure of coal microstructure were mensurated based on coal and rock separation of coal samples.Experiment date was analyzed. The conclusions as following:The carbon monoxide adsorption mode in coal seams was Langmuir monomolecular layer adsorption while T≤50℃and the relationship between carbon monoxide adsorption quantity and pressure was linearity while T>50℃. The carbon monoxide proliferation mode generally was Knudsen proliferation or transition proliferation.The carbon monoxide adsorption and proliferation quantity of inert group was more than those of vitrinoid group. It means that the influence of inert group on carbon monoxide adsorption and proliferation quantity was much more than vitrinoid group for medium-low rank coal.The biggish proportion of transition pore and micropore was the dominant effect to carbon monoxide adsorption–proliferation. The relationship between the adsorption quantity with the ratio of micropore was quadratic curve while P=0.8MPa, and it was direct proportion while P=3.2MPa. The carbon monoxide adsorption quantity was decreasing with the upgrade of temperature. The relationship between the carbon monoxide proliferation quantity with the ratio of transition pore was direct proportion, and it was inverse proportion with the ratio of micropore. The relationship between the carbon monoxide adsorption quantity with the specific surface area was direct proportion, and it was convexity quadratic curve with the porosity and fractal dimension of coal. The relationship between the carbon monoxide proliferation quantity with the specific surface area was saucer shape quadratic curve, direct proportion with the ratio of carbon and hydrogen and the ratio of vitrinoid group, and it was porosity and fractal dimension of coal, and it was convexity quadratic curve with the ratio of inert group.The experiment date was analyzed and the regression equation of the relationship between the carbon monoxide adsorption and proliferation quantity with main targets was fitted by QM software. The analysis offered an academic base for farther mechanics research of carbon monoxide movement and proliferation in coal seam.