低透气性煤层深孔控制预裂爆破技术研究

Study on deep-hole controlled pre-splitting blasting technology of low permeability coal seam

在低透气性突出煤层煤巷掘进工作面采用深孔控制预裂爆破技术后,大大提高了煤层透气性,通过抽放、排放措施,大大降低了煤层瓦斯含量和瓦斯压力,煤体应力向深部转移,消除前方突出危险性,煤巷单进水平大幅提高,月进尺由原来60 m提高到110 m,保障了采掘的正常接替。

The coal seam permeability was improved greatly by using deep-hole controlled pre-splitting blasting technology in coal roadway driving working face with low permeability outburst coal seam. By gas drainage,the gas content and gas pressure was reduced,outburst risk was eliminated,coal roadway driving rate was improved significantly and normal mining-excavation plan was ensured.