Effect of mechanical caving extraction gas for coal seam borehole
In order to study the effect of mechanical cavitation drilling on gas extraction,taking the 3# coal seam of Shaqu No.2 Coal Mine as the engineering background,the numerical simulation research method is used to compare and analyze the effect of parallel drilling and mechanical cavitation drilling on the effective gas extraction area.The research shows that by using mechanical cavitation drilling,the volume of effective extraction area can be increased by 1.75 times compared with parallel drilling.Through the field experiment,and the gas extraction data monitoring,after the application of cavitation drilling,the average mixed extraction flow increased by 1.84 times,the average gas extraction purity increased by 1.62 times.Through the application and research of mechanical cavitation drilling,the theoretical foundation is laid for the gas ex-traction scheme of cavitation enhancement.
gas extractioncoal seam drillingmechanical cavingparallel drillingextraction effect
万方数据
维普
