Gas Fathering Scheme Selection of 8104 Comprehensive Mechanized Caving Face in TASHAN Mine on the basis of numerical simulation
NIU Jianhua
Abstract：At first, necessity and feasibility of gas drainage was analyzed in the text about 8104 Comprehensive Mechanized Ca-ving Face in TASHAN Mine , the result shows that it is ncessary for the gas drainage to the working face , and moreover , it is not provided with the conditon for gas pre -drainage in mining seam.Three schemes was brought forward , and they are drainage in the top corner , natural extracting gas through roof roadway and using the pump to extract gas through roof roadway , and these schemes may solve the gas emission from the neighborhood seam and goaf;and then, the gas migration rule was studied in three conditions by making use of numerical simulation , the corresponding distribution of pressure , atmosphere velocity and gas con-centration was obtained in the working face and goaf.The research results are as follows.The drainage in the top corner and u-sing the pump to extract gas through roof roadway may reduce gas concentration in the top corner by a large margin , and at the same time, it is very easy to lead the spontaneous combustion of goaf;natural extracting gas through roof roadway has the ability to resolve the gas question from the top corner basically , and but , it is easy to exceed the limitation for the gas concentration of stope.Therefore , natural extracting gas through roof roadway and spraying surfactant were advised to use for fathering gas .
Keywords：Gas drainagenumerical simulationComprehensive mechanized caving face
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 24-28,43 )