关键词: 瓦斯治理, 泄压瓦斯, 邻近层抽采, 高位钻场

Abstract: Gas disaster is a major dangerous source which is extremely difficult to control in the process of coal mine safety production.Especially for the mines in the South,they are featured by thin coal seams,small coal seam spacing,complex geological structures and large gas reserves and so on,which all makes the gas control work difficult.How to effectively control gas emitted from short distance seams when mining is carried out in thin coal seams under extremely complicated geological conditions.It is proposed to position high location drainage lane and supporting long drilling hole in the coal seams group,to drain gas in pressure relief area and gob area of adjacent coal seams in coalface during the coal mining process,so as to reduce the emission amount of the pressure relief gas in the adjacent seams.According to the research,the proper layout of parameters such as lanes spacing,drilling length,drilling spacing and drilling position of high location extraction lane makes the net volume of gas extraction in coalface increased by more than 10 m3/min,the extraction rate is increased to more than 60%,and the volume of windblown mine gas was reduced.The safe mining in coal seams under special storage condition is realized,and the purpose of safety production is achieved.

Key words: Gas Control, Pressure Relief Gas, Adjacent Seams Drainage, High Location Drilling Field