我矿是一个小矿山,由于缺少大型钻机,1971年8月试验成功不需要钻凿中心孔的反向提升吊罐法掘进天井。1973年4月,进行了第四次生产试验,15天掘通了48米高的四中段东通风天井(断面1.6×1.6米~2),成井速度达80米/月。反向吊罐法与过去使用的方柱支架法相比具有许多优点:提高天井掘进速度四倍; My mine is a small mine. Due to the lack of a large rig, the pilot test in August 1971 succeeded without the need for drilling the center hole of a reverse lift crane to tunnel the well. In April 1973, the fourth production test was carried out. The 48-m high fourth-east east ventilation pavilion (section 1.6 × 1.6 m ~ 2) was dug up in 15 days and the rate of well completion was 80 m / month. The reverse jar method has many advantages over the square column method used in the past: to increase the speed of the tunnel boring by four times;