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几年来手掘硐探的效率提高很慢,这主要是由于凿岩爆破技术落后的緣故。在爆破方法上,近两年来随着边掏心爆破法及扩底爆破法的广泛採用,初步解決了。但穿孔速度低的問題,在今天就成为障碍生产继續发展的一大问題。五台山队經过多次試驗研究两差刃钎头凿岩的成功,使穿孔速度較原一字型钎头提高近半倍。現将其經驗介紹如下: 一、钎头形状及尺寸
In recent years, the efficiency of excavation exploration has been slow, mainly due to the backwardness of drilling and blasting technologies. In the blasting method, in the past two years, with the extensive use of the side-cut blasting method and the explosion-blasting method, a preliminary solution has been made. However, the problem of low piercing speed has become a major issue for the continued development of obstacle production today. Wutaishan team after several trials to study the difference between the two sides of the first drilling edge drill bit, the perforated bit faster than the original font bit nearly half times. The experience is introduced as follows: First, the shape and size of bits