论文部分内容阅读
在毛主席的革命路线指引下,我国钢铁工业结束了十年徘徊,正在高速度地向前发展,这就要求采矿工业提供更多的矿石。目前我国铁矿石生产中,百分之九十是靠露天开采的,而在露天采矿中,穿孔工序是最薄弱的环节,大多还是使用着五十年代以前的效率很低的钢绳冲击钻,远远不能适应大型机械化生产的需要,许多高效率新型钻机,由于钻具质量不好,不能发挥更大作用。我国许多露天矿山已经拥有相当数量的大型潜孔钻机,但是由于钻具效率和寿命很低,以及一些其他原因,使钻机不能正常工作,甚至废弃不用而改用钢绳冲击钻。因此,提高钻具质量以改变穿孔落后状况,对发展钢铁工业具有重要意义。
Guided by Chairman Mao’s revolutionary line, the steel industry in our country has ended a decade of stagnation and is moving forward at a high speed. This requires the mining industry to provide more ore. At present, 90% of China’s iron ore production is mined in the open pit. In the open pit mining, the perforating process is the weakest link, most of which still use the inefficient steel cord impact drill before the 1950s , Far can not meet the needs of large-scale mechanized production, many new high efficiency drilling rig, due to poor quality drilling can not play a greater role. Many of our country’s open mines already have a significant number of large-scale down-the-hole drilling rigs but have switched to rope-impact drilling due to the low efficiency and longevity of drilling tools, as well as a number of other reasons, preventing the rig from working properly or even abandoning it. Therefore, improving the quality of drilling tools to change the situation of perforation behind is of great significance to the development of the steel industry.