Arrangement of Gas Drainage Boreholes and Investigation and Analysis on Effect of Pre-drainage Gas by High Gas-drainage RoadwayReportar como inadecuado




Arrangement of Gas Drainage Boreholes and Investigation and Analysis on Effect of Pre-drainage Gas by High Gas-drainage Roadway - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

In order to investigate the effect of drainage arrangement and time of the Roadway pre-pumpingAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.high seam Coal gas drilling, take YiAn mine FD003 alley pumping of Yima Industry Group as test site, ByAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.investigating the Five presbyopia drilling group arrangement and control scope of which the spacing is fourAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.meters, five meters and six meters, through the length time of the drainage to analyze the drainage effect.Abstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.Experiment results show that through changing holes arrangement, expand control scope and increase controlAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.drainage time can improve drainage effect, could also eliminate the risk, through analysis on the drainageAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.time, size of excavation and validity of the indexes for the footage investigation, Drilling distance is sixAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.meters, Drainage time seventy-five days, could get the best effect, compare with other three layouts the speedAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.of tunneling can increase by 50%.

KEYWORDS

high gas-drainage;gas;arrangement;investigation and analysis

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Autor: Feng Pan, Peiliang Ren, Nianhong Wang

Fuente: http://www.scirp.org/



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