李雅庄矿中深孔松动预裂爆破技术研究

Study on Medium and Deep Hole Loosening Presplitting Blasting Technology in Liyazhuang Coal Mine

为解决李雅庄煤矿2-605工作面回采过程中遇到断层时难截割,推进缓慢,材料消耗大的问题,采用中深孔松动预裂爆破技术降低工作面断层处围岩强度,提高生产效率。实践证明,通过此技术,2-605工作面通过断层时推进速度提高约1.4倍,圆班减少截齿消耗约20个,提高了产能和推进速度,同时也节约了生产材料。

In order to solve the problem of difficult cutting, slow progressing and heavy material consumption during mining going through fault in 2-605 working cracking blasting technology is adapted to the cutting speed increased by about 1.4 increased, materials saved. loosen the times and face in Liyazhuang coal mine, the medium and deep hole pre- surrounding rock and improve efficiency. Practice has proved that pick consumption in a round shift reduced by 20, production