Experiments And Analysis About Influence Factors On Coal Seam Gas Extraction

At present, the effect of coal seam gas extraction is poor, and the drilling hole layout parametersare not optimized in most areas of China. In views of these situations, this thesis focuses on theexperiment and analysis related to those factors affecting the effect of coal seam gas extraction;including cloth hole spacing, drilling depth and extraction time. Some conclusions between thosefactors and extraction effect are also given.At the beginning of analyzing, we get the relationship between coal seam extraction effect andthose factors according to the rough theoretical analysis that the gas occurrence and flowing in coalseam, and finally get the exaction relationship between those factors and the extraction effect moreclearly through the test and analysis about natural gas flowing, pure gas flowing, total volume of gasdrainage and the efficiency of gas drainage in flowing field.We get the accurate relationship between those factors and the extraction effect afterexperiment data analysis and experiment in Xin’an ore, there are some guiding significances toimprove gas extraction rate and reduce the cost of coal seam gas extraction in Xin’an ore.