Experimental Study on the Gas Drainage Based on Parallel Boreholes with Large Diameter
Gas accidents today have become one of the major accidents that influences the safety of Chinese coal production.Aiming at the problem that gas outburst is very serious, gas drainage is mainly used at the working face to reduce the gas content.In order to better study the effects of the large diameter parallel boreholes technology, prevent the occurrence of the gas accidents, and reduce the casualties and property losses in the coal mines.Through the study on the spacing between the parallel boreholes, the author arranges 4 groups of parallel boreholes at Φ113 mm with the spacing at 4m, 6m, 8m and 10m in the same test roadway, and comprehensively investigates the effect of the boreholes gas drainage.The result showes that the pre - pumping effect of the spacing at 4m is better than any other spacing, and increasing the drilling density is conducive to improve the pre - pumping rate.So it determines the reasonable spacing of the parallel boreholes of the coal seam that contains the test roadway is 4m.
large diameter horizontal boreholes gas drainage time gas drainage volume attenuation coefficient prepumping rate the hundred meters drilling reasonable hole spacing
Zhou Yang Li Zhi Li Xuebing Mu Libin
College of Safety Science and Engineering,Liaoning Technical University,Fuxin,123000,China Mine called Guhanshan belongs to the coking coal company of Henan coalification group,Jiaozuo,Henan
国际会议
the 4th International Symposium on Mine Safety (2012) 第四届国际矿山安全学术研讨会(2012)
阜新
英文
13-17
2012-08-04（万方平台首次上网日期，不代表论文的发表时间）