Research on the Influence of the Kilometers Rig Drilling Parameter on the Gas Drainage EffectReportar como inadecuado




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In 2005, VLD kilometer rigs were applied in Sihe Mine of JinCheng Anthracite Mining Group, butAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.because of borehole equipment factors, drilling technology, mainly coal geological conditions, lead to poorAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.drilling results. According to the situation of Sihe Mine, we can do experiments of drilling rig kilometers onAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.typical coal, after analyzing and researching relationship with gas resoluble and experimental drilling whichAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.includes drainage negative pressure that is between 8kPa and 20kPa and drilling length that is among 400m,Abstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.600m and 800m. Finally we can get the effective parameters of kilometer drilling. Get conclusions: At theAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.same drilling depth, the changing of negative pressure has little effect on gas flow, the negative pressure ofAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.drainage is adopted between 15 and 20kPa in Sihe Mine .Gas drainage concentration, extraction negativeAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.pressure and extraction flow are closely connected, if one factor’s change will lead to other factor’s change.Abstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.So in order to get the best drainage conditions we must monitor and control them; With the increasing depthAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.of drilling the initial drilling gas flow also increases, however, the increase of initial gas flow is notAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.proportional to the depth of drilling, in the same conditions, the drilling depth influences gas drainageAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.quantity, the longer the length of drilling is, the larger amount of gas drainage is. ComprehensiveAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.consideration, 600m is advisable for Sihe Mine kilometer drilling.

KEYWORDS

the kilometers rig drilling; long holes; negative pressure; gas drainage concentration; depthAbstract: In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gaspressure.of drilling; attenuation coefficient

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Autor: Xiao Pan, Yu-cheng Li, Guang-hui He

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



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