大断面岩巷中深孔爆破快速掘进技术应用

Application of Rapid Heading Technology with Deep Borehole Blasting in Mine Large Cross Section Rock Roadway

通过推行直眼中空四角柱式掏槽技术、多向聚能爆破技术、新型定向断裂巷道轮廓成形控制技术等一套坚硬围岩中深孔爆破技术,巷道成形效果和围岩稳定性明显增强,循环进尺和掘进效率显著提高,实现了全岩巷道的快速掘进,有效缓解了矿井单一煤层采掘接替紧张局面,对高产高效矿井建设和提高经济效益具有重要作用。

With the promotions of the straight borehole central blank four comer pillar type cutting blasting technology, multi directional energy accumulated blasting technology, new forming control of a directional fracturing roadway profile and completed set hard rock blasting technology with medium depth boreholes, the roadway forming effect and surrounding rock stability were obviously improved and the circulated advance rate and heading efficiency were obviously increased. A rapid heading of the mine full rock roadway was released and a tension situation of the mining and excavation replacement for a single seam in the mine was released effectively. All those could have an important ro｜e to construct the high production and high efficient mine and to improve the economic benefit.