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一、问题的提出徐家山、小源、小水等矿区，含涌水层段坑道掘进，采用2~#岩石铵梯炸药、8~#火雷管起爆，因炸药被水浸湿，常常拒爆。眼径40mm、眼深18m、每个循环需经2—3次爆破后，方能推齐掌子面。台班进尺常在0.3—0.5m，每米耗药量多达30—40kg。进尺少，效率低，材料消耗多，成为掘进工作两个效益提高的“拦路虎”。通过长期的探索，采用比较适合含涌水层的掘进、掏槽、凿岩爆破、浅眼多循环、小台阶分层爆破和药包防水等工艺技术后，每班推进1—1.5循环，并获一次性成巷。钻月进尺提高21％，每米材料消耗降低30％，各项技术指标和效益都取得了较好的成绩。
First, the issue raised Xujiashan, small source, small water and other mining areas, with gushing tunnel excavation, the use of 2 ~ # ammonium rock explosives, 8 ~ # detonators detonated, because the explosives were wet, often refused to burst. Eye diameter 40mm, 18m deep, each cycle after 2-3 blasting, before pushing the palm face. Taiwan often into the 0.3-0.5m footage, consumption of drugs per meter up to 30-40kg. Small footage, low efficiency, material consumption and more, as driving efficiency improvement two “stumbling block.” Through long-term exploration and adoption of more suitable excavation, undercutting, rock blasting, multi-circulation with shallow water level, multi-stage blasting with small steps and water-proofing of drug packs, the class is advanced by 1-1.5 cycles per class and obtained Alley into a one-time. Drilling footage increased by 21%, 30% reduction in material consumption per meter, the technical indicators and benefits have achieved good results.