我矿几年来在中孔爆破的回填工作中,曾多次发生因充填物砸断雷管脚线而使中孔报废的现象。针对这种现象,在回填炮孔时采用了套管将雷管脚线保护起来,使其不被充填碴砸断的方法,这不仅减少了废孔率,而且可将原来的复式脚线改为单式脚线。以节约大量胶质线,这就是本文所介绍的“套管回填法”。 I mine several years in the backfilling of the hole in the blasting work, there have been many times because of the fill smashed off the detonated pinch and the hole in the phenomenon of scrapped. In response to this phenomenon, the use of casing in the backfill blasthole to protect the mine line, so that it is not filled ballast smashed broken method, which not only reduces the waste hole rate, but also the original split foot change Single-foot line. In order to save a lot of glue line, this is introduced in this article “casing backfill method.”