厚煤层综放工作面架后深孔松动预裂爆破技术应用

Application of Deep Hole Loose Presplit Blasting Technology in Fully Mechanized Top Coal Caving Face of Thick Coal Seam

针对串草圪旦煤矿Ⅲ类中等稳定顶板,厚煤层综放开采工作面,在工作面初采初放过程中,初次垮落步距较长,对工作面安全生产带来一定影响,为消除安全隐患,减少初采初放过程中的煤炭损失,提高煤炭回收率。通过分析研究,提出了综放工作面架后深孔松动预裂爆破技术,并取得良好效果。

Aiming at the fully mechanized top coal caving face with class III medium stable roof and thick coal seam in Chuancao Gedan Coal Mine,in the process of initial mining and caving,the first caving step is longer,which has a certain impact on the safety production of the working face.In order to eliminate the potential safety hazard,reduce the coal loss in the process of initial mining and caving and improve the coal recovery rate,through analysis and research,the deep hole loose presplit blasting technology is put forward in fully mechanized top coal caving face and good results are achieved.