|
In order to scientific manner control mine gas, guaranteed the mine safety production, Hongyuan Coal Mine and Coal Research Institute of Shenyang co-operation do basic parameters of gas and gas emission projections.This article has done following work:Carries on the scene investigation to the great far coal mine actual production situation, gathers the new exposed coal wall 8m deep place coal sample, the scene uses the FHJ-2 gas desorption speed cryoscope determination gas desorption speed, after and seals delivers the laboratory determination coal sample surviving gas quantity, the computation to obtain the coal bed gas content parameter, again schemes to set people at odds the connection to calculate the coal bed gas pressure; And hits in the scene drills the determination drill hole to gush out naturally the characteristic; Meanwhile in laboratory determination coal gas adsorption constant, factor of porosity and coal bed permeable parameter.According to the scene mine shaft actual parameter and the coal sample laboratory parameter determination material generalized analysis, and unifies the great far coal mine correlation data, with a minute source forecast the law forecast the computation mine pit working surface, the neighbor level, picks region and so on depletion region gas to gush out the quantity, is the damp government provides the data support.Gushes out the quantity forecast result according to the gas, the choice pulls out picks the method to the mine pit mining level, the neighbor level and picks the depletion region to carry on the gas to pull out picks, reduces the damp density, reduces the gas disaster to have the probability, raises the mine safety production level.At the same time,using the Fluent software to the gas picks the drill hole aperture to carry on the modelling, compared with scene 75mm, 85mm, 94mm and 113mm four kind of diameter drill bits pulls out to the gas picks the effect the influence, for enhances the gas to pull out picks the quantity, increases the gas to pull out picks the efficiency to provide the basis.
|