Characteristics and Control Measures of Gas Emission in Low-gas Coal Seam Mining Face
Taking the mine of Shouyang Luyang Xiangsheng Coal Industry Co.,Ltd.of Shanxi as the research object,the gas emission of the mine was calculated based on the prediction method of the gas emission of the mine,the gas emission characteristics of the low gas coal seam working face were analyzed,and the gas drainage effect of pipe burying-pipe inserting in upper corner drainage method was analyzed.The gas emission of the mine was within the standard limit before the collapse of the foundation roof,the gas emission had a significant upward trend and was greater than the limit specified in the specification when the foundation roof collapsed for the first time.The gas concentration difference between the production team and the non production team was small,and the gas emission difference was large,which indicated that the process of coal mining and drawing and coal transportation had a great impact on the gas emission of the mine.There was a certain difference between the gas drainage amount and gas concentration between the maintenance team and the production team.The gas drainage amount and gas concentration at the upper corner of the production team are greater than those of the maintenance team.
gas emission characteristicsprediction method of gas emissionupper corner pipe burying-pipe inserting drainage
NETL
NSTL
万方数据
