论文部分内容阅读
在斜井、盲井、下山等掘进中,其打眼方向均为下向的,因此在凿岩过程中,由于客观条件的影响,卡钎事故较之一般为多。这不仅減少了純打眼时間,有时因被卡住的钎子无法拔掉而浪费了钎子鋼,并影响了炮眼排列的質量,以致大大降低爆破效果。因此在下向凿岩中,如何防止卡钎事故也是掘进工作中一个重要问题。根据我們在实际凿岩工作中的摸索,取得了以下几点经验: 一、做好凿岩前的准备工作。因为下向凿岩容易卡钎的主要原因之一,是由于工作面上有石碴与积水,
In the incline, blind, downhill and other tunneling, the drilling direction is downward, so in the rock drilling process, due to the impact of the objective conditions, more than the average card brake accident. This not only reduces the time required for purely drilling the eye, but sometimes istes the brazing steel due to the stuck braze can not be unplugged, and affects the quality of the arrangement of the borehole so as to greatly reduce the blasting effect. Therefore, in the next rock drilling, how to prevent the accidental welding is also an important issue in tunneling work. According to our exploration in the actual drilling work, made the following experience: First, do a good job before drilling. One of the main reasons for easy brazing under the rock drilling is due to the presence of ballast and water on the work surface,