1958年以来,我国矿山科学研究机构和一些薄矿脉矿山,曾陆续地开展了采场小直径炮眼崩矿的研究与试验,取得一定成绩,并已获得下列初步效果,从表1中看出。减小40～46毫米的炮眼直径至30～36毫米时,凿岩速度提高了30～50％(最高达198％),单位炸药消耗量降低了15～32.4％,压气单位降低了42.33％,采幅减小了2～32.8％,个别矿山块度测定结果,无法手选的碎矿产出率减少了14.5％,<5毫米的粉矿 Since 1958, China’s mining scientific research institutes and some thin vein mines have successively carried out research and experiments on small-diameter blast-hole collapse in the stope and achieved certain achievements. The preliminary results have been obtained as shown in Table 1. Reducing the hole diameter from 40 to 46 mm to 30 to 36 mm increased rock drilling speed by 30-50% (up to 198%), unit explosives consumption by 15-32.4%, reduction in gas units by 42.33% The amplitude of sampling decreases by 2 ~ 32.8%. As a result of the measurement results of individual lumps, the output of crushing ore that can not be selected by hand is reduced by 14.5%