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几年来,我们曾根据现场需要,进行了一些光面爆破喷锚方面的科研试验,除在巷道中试验成功了1.7～4米深孔的后裂光面爆破外,还曾于1975年8月协助某单位在建设地下油库工程中,初步试验成功了进度超过6米的超深孔预裂光面爆破,创造了“全深度全断面电裂,分阶段分层次抛碴”的爆破方式和“挤压抛碴式”的掏槽方法,最高一次爆成一个20米深的正方形竖井,打破了美国创造的一次超深孔光爆竖井14.63米的记录。超深孔光面爆破是快速、优质、安全、高效和机械化凿井的好方法。一、基本情况试验竖井位于一个海岛油库西侧的半山坡上,为某地下油库的总控制井和通风井,全深为21米多,掘进断面为4.2×4.2=17.6米~2的正
In the past few years, we conducted some scientific experiments on smooth blasting and shotcrete anchor according to the needs of the site. In addition to the successful trial of post-cracked smooth blasting of 1.7 to 4 meters deep holes in the roadway, Assist a unit in the construction of underground oil depot project, the initial test of the successful progress of ultra-deep hole progress over 6 meters pre-split smooth surface blasting, creating a “full-depth full-face electric split, stage sub-ballast ballast” blasting and “ Squeeze ballast ”cut method, the highest burst into a 20-meter-square shaft, breaking the United States to create a super-deep hole light explosion shaft 14.63 meters record. Super-deep-hole smooth blasting is a good method for quick, high-quality, safe, efficient and mechanized drilling. First, the basic situation Test shaft is located on the west side of an island oil depot on the hillside, the total control of the underground oil tank and ventilation shaft, full depth of 21 meters, heading section 4.2 × 4.2 = 17.6 m ~ 2 positive