论文部分内容阅读
通常的爆破作用都会使裂缝向开挖工程帮壁内扩展。这些裂缝会降低开挖工程的稳固性。控制爆破的目的就是要减少周边的这种破裂现象,从而提高开挖工程的稳固性。杜邦公司与其它一些公司合作,出版了一本小册子,综合论述了四种主要控制爆破法,本文转引了其部分内容。通过数年的现场试验和观察,确定了四种控制爆破法所需的孔径、孔距、最小抵抗线和装药量等数据。现简介于下。
The usual blasting effect will make the cracks extend to the wall of the excavation. These cracks will reduce the stability of excavation. The purpose of controlling the blasting is to reduce the surrounding rupture, thereby enhancing the stability of the excavation. In collaboration with a number of other companies, DuPont publishes a pamphlet outlining four major controlled blasting methods, which is quoted in part. After several years of field test and observation, the data of the four kinds of controlled blasting methods such as the required aperture, the hole distance, the minimum resistance line and the charge amount were determined. Now brief below.