深孔二次爆破增透效果的试验研究  

Experimental Research on Effect of Permeability by Secondary Blasting in Deep Hole

作　　者：武福生 WU Fu-sheng(Changzhou Research Institute, China Coal Technology and Engineering Group, Changzhou 213015, China)

机构地区：[1]中煤科工集团常州研究院有限公司

出　　处：《煤炭技术》2019年第6期118-120,共3页Coal Technology

基　　金：国家重点研发计划资助项目(2016YFC0801804)

摘　　要：为了研究深孔二次爆破对煤层的增透效果,采用相同爆破参数在矿井现场进行了3次爆破试验,通过对爆破后钻孔瓦斯抽放浓度的变化情况进行分析,揭示了二次爆破对煤层增透效果的影响规律。试验结果表明:二次爆破能进一步提高煤层的增透效果,但是相较第1次爆破的增透效果有所降低;在同等情况的爆破作用下,爆破后煤层的平均瓦斯抽放浓度增量随煤层初始瓦斯抽放浓度增加而呈衰减趋势。In order to research the effect of permeability by secondary blasting in deep hole of coal seam, three blasting tests were carried out in a coal mine by using the same blasting parameters.Through the analysis of the variation of the concentration of gas in drainage hole after blasting, revealed the law of the influence of the secondary blasting on the effect of coal seam permeability. The test results show that the secondary blasting can further improve the permeability increasing effect of the coal seam, but it is lower than that of the first blasting;and under the same condition of blasting, the average gas drainage increment of the coal seam after blasting is decreasing with the increase of the initial gas drainage concentration.

关 键 词：二次爆破 聚能爆破 煤层增透 

分 类 号：TD712[矿业工程—矿井通风与安全]