| The coal mine gas is one of the important factors to restricting the safety in production and economy benefit of coal enterprises all the time. The prediction of gas emission and gas outburst in the coalmines is a prerequisite precondition of ventilation management and making rational gas prophylactic-therapeutic measures. Through geology synthetically analysis, on the basic of finding out the correlation between gas deposit and chiefly geological influencing factors of researchful coal seam, protracted the gas emission isoline map of excavated area in Sufer and AutoCAD. For using full and accurate correlative datas of bores which is more and systemic collocation,figuring out the value of gas emission in every bore,established the mathematics model of forecasting gas emission of researchful coal seam,and forecasted gas emission of not excavating area in mine,drawn gas emission isoline map of coal seam. On the basis of analysis about former coal and gas outburst,studying correlation between geological conditions in influence area of outburst place and outburst,protracting a series of analytical pictures,found out the primary geological factors which effect coal and gas outburst,Gas geology zoning, which divide the coal seam into no outburst dangerous zones, outburst dangerous zones and gas outburst dangerous zones, is built in the coal seam utilizing the gas geology indicator method and combining with the radical gas parameters. The forecast results of outburst fatalness are expressed with gas geology pictures. Its reliability is upper that the forecast of mine gas emission and outburst fatalness through verified by fractional excavating practice. |
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