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Reseach And Application On The Working Face Outburst Prevention Of Hebi 8th Coal Mine

Posted on:2012-01-05Degree:MasterType:Thesis
Country:ChinaCandidate:W T YinFull Text:PDF
GTID:2131330335453317Subject:Safety Technology and Engineering
Abstract/Summary:PDF Full Text Request
Coal and gas outburst accident has been one of the most important factors impact on the production of Hebi 8th coal mine.According to historical statistics, since the establishment of mine there had been a total of 9 times about coal and gas outburst accidents, causing heavy casualties and property losses.With the gradual increase of mining depth, resulting in a lot of the recent outbursts that are located in the coal working face,no longer the traditional view that the most prominent incidents occurs only in the heading face, or the process of uncovering coal seam.Besides,most accidents are partly due to the lack of scientific test measures or results.In this paper,author took the 3002(middle) working face of 8th coal mine as the research object.Due to its large deep mining conditions. Firstly, observe the tectonic coal along with the picking process of working face. Measured by downhole gas parameters, collected routine data of gas emission and verification indicators.Using geological theories to compile a gas geological map of the working face, we take advantage of gas geological map to guide the selection and layout parameters of regional measures.Secondly,we propose a verification indicator and critical value which suit to the current situation of Hebi 8th coal mine, and take several aspects into consideration and listed them as follows:Check residual gas content after regional measures exerted through inspect the gas emission of working face and measure the residual gas content of mined coal seam via calculate approach of gas emission; By laboratory simulation study on the relationship between gas content and indicators of cuttings desorption,finding a gas content which correspond to the given indicators; According to the mensuration to determine the gas content which corresponding routine verification indicator at a safe level; Finally, using the prominent features of the history of the mine to determine the residual gas content. Through these research aspects, determine residual gas content ultimately which fit for the Hebi 8th working face,that is 9m~3 / t.After applications through the site to inspect the gas content and through inspectable results we can found that it is suit to actual situation of the mine in aspects of safety and production needs.
Keywords/Search Tags:coal and gas outburst, Regional prevention, Technique system, Residual gas content, Review the effect against outburst
PDF Full Text Request
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