摘要
介绍了液态CO_2预裂爆破增透技术原理及预裂装置。现场试验表明:预裂爆破后煤层透气性系数增大了2.0~6.8倍,预裂钻孔浓度提高1.38倍;预裂钻孔的百米钻孔瓦斯抽采量是对比孔的4.6~11.5倍。试验取得较好的效果。
The mechanism of CO2 blasting fracturing pre-permeability and equipment were introduced. The field test shows： after the blasting, the permeability coefficient of coal seam was increased by 2.0~ 6.8 times and extraction concentration was improved by 1.38 times. Gas drainage from pre-fracturing was 4.6-11.5 times large than contrast boreholes. The experiment achieved good results.
出处
《煤炭技术》
北大核心
2017年第9期249-250,共2页
Coal Technology
