PROVISION OF SECURITY OF THE DRILLING AND BLASTING OPERATIONS BY BLASTING TWO PARALLEL CLOSELY SPACED WELLS OF HIGH LEDGES IN OPEN PITS

被引：0

作者：

Ugolnikov, N. V. ^{[1
]}

Domozhirov, D. V. ^{[1
]}

机构：

[1] Magnitogorsk State Tech Univ GI Nosov, Magnitogorsk, Russia

来源：

PROCEEDINGS OF THE TULA STATES UNIVERSITY-SCIENCES OF EARTH | 2019年 / 3卷

关键词：

blasting; by two parallel closely spaced holes; the critical speed of displacement of the medium; equivalent distance led; the drilling and blasting parameters; physical-mechanical properties; strength; the fracture of rocks; given resistance line on the sole and the distance between by two parallel closely spaced holes in a row;

D O I：

暂无

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

In open pits with a capacity of up to one million cubic meters per year in terms of rock mass the preparation of rocks for excavation is carried out by outsourcing companies with drilling equipment of small and medium diameter, which does not ensure the safety of drilling the first row of wells on working ledges with a height of more than 10 m and a slope angle of more than 70-75 degrees. The subject of research is deposit of non-metallic building materials. The paper describes the application by two parallel closely spaced wells as safe technology drilling and blasting operations (DBO). The method of calculating the parameters of DBO in the medium-and large-block rocks is presented by using of the principle of self-similarity taking into account critical speeds array offsets as in blasting on the free surface, and the interaction of related charges of the first row by two parallel closely spaced wells.

引用

页码：332 / 343

页数：12