摘要
大口径硬岩钻凿是一个技术难题，尽管国内外科学家和工程技术人员研究思路及方法较多，并取得了一定效果，但是，仍然存在着各种问题和不足。笔者对目前国内外研究现状作了简要综述，并结合国情对其研究方向和思路提出了自己的观点。
The large hole hard drilling is a technical difficult problem,though there are many researching thinking and methods from scientists and engineering technical personnel at home and abroad and achieved certain results.But,there still exist each sorts of problems and insufficient.The author has summarized the researching situation briefly at home and abroad,and provided his views about researching trend and thinking combining the situation of the country.
出处
《河南地质》
1998年第1期57-60,共4页
Henan Geology
