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扩底爆破法（俗称葫芦炮亦称药壶法）是把炸药集中在炮眼底部的药壶中进行爆破，以达到提高破坏岩石的作用和减少单位进尺的炮眼消耗量。通过这次重点试验证明，扩底炮与小口径炮比较，获得如下的经济效果：单位进尺打眼工作量减少4/6—5/6，炸药消耗量减少1/4—1/3，提高了掘进效率，根据试行后一个月初步统计，在8级整块致密坚硬的石灰岩中掘进，月进尺由8公尺提高到32公尺，队班效率由0.2公尺提高到0.7公尺（最高记录）。
Expansion blasting method (commonly known as gourd gun pot method) is concentrated in the explosives in the bottom of the blast hole in the blasting of pots, in order to achieve the role of improving rock destruction and reduce the unit footage of the hole consumption. Through this key trial, it has been proved that the bottoming-end gun and the small-caliber gun have the following economic effects: a reduction of work-load per unit footage by 4 / 6-5 / 6 and a reduction of 1 / 4-1 / 3 of explosive consumption have been achieved According to the preliminary statistics of the month after the trial, the tunneling efficiency was improved from 8 blocks to 8 meters and the team efficiency increased from 0.2 meters to 0.7 meters (the highest record ).