天府矿务局二汇坝二井皮带运输机上山全长1215米,倾角15度,掘进断面15.4米~2,喷射混凝土支护,局部砌(石旋)。1982年3月开始施工,至10月2日掘进了484米,遇F_4断层,在断层带中掘进了40米,已进入灰岩22米,由于顶板破碎,将掘进断面由15.4米~2改为6.8米~2,小断面掘进了9米。1983年1月24日掘进至561米处,放炮诱发煤(岩)与沼气突出,突出煤(岩)量5000米~3,沼气突出量达55万米~3。 Tianfu Mining Bureau Erhupu two belt conveyor belt up the mountain a total length of 1215 meters, 15 degrees dip, heading section 15.4 m ~ 2, shotcrete support, local puzzle (stone spin). Construction commenced in March 1982 and reached 484m on October 2 in case of F_4 fault, 40m in fault zone and 22m in limestone. As the roof was broken, the tunneling section was changed from 15.4m ~ 2 6.8m ~ 2, 9m for small section digging. On January 24, 1983, it was driven to a depth of 561 meters, and the blasting of coal and rock was highlighted. The amount of coal and rock was 5000-3 and the outburst of methane was 550,000-3.