SU1417577A1 - Method of contour rock mass blasting - Google Patents

Method of contour rock mass blasting

Info

Publication number
SU1417577A1
SU1417577A1 SU4076345/03A SU4076345A SU1417577A1 SU 1417577 A1 SU1417577 A1 SU 1417577A1 SU 4076345/03 A SU4076345/03 A SU 4076345/03A SU 4076345 A SU4076345 A SU 4076345A SU 1417577 A1 SU1417577 A1 SU 1417577A1
Authority
SU
USSR - Soviet Union
Prior art keywords
boreholes
charges
borehole
blasted
blasting
Prior art date
Application number
SU4076345/03A
Other languages
Russian (ru)
Inventor
Ю.К. Краснов
М.И. Шуйфер
Original Assignee
Специализированный Проектно-Изыскательский И Экспериментально-Конструкторский Институт "Гидроспецпроект"
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Специализированный Проектно-Изыскательский И Экспериментально-Конструкторский Институт "Гидроспецпроект" filed Critical Специализированный Проектно-Изыскательский И Экспериментально-Конструкторский Институт "Гидроспецпроект"
Priority to SU4076345/03A priority Critical patent/SU1417577A1/en
Application granted granted Critical
Publication of SU1417577A1 publication Critical patent/SU1417577A1/en

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  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

FIELD: blasting. SUBSTANCE: contiguous boreholes 1 are drilled in the plane of the design contour, they serve as a nucleus of the system and are spaced at a = (2-5) d,, where d-diameter of borehole 1. The number of boreholes 1 is determined by formula N= a/d+1+1. Then boreholes 2 and 3 are drilled, they are spaced at b=10-25 b = 10-25 d.. Boreholes 1 through 3 are loaded with explosive charges. Detonating cords 5 are laid from main line 4 to each charge in borehole 1, the other charges are connected through detonating cords 6,7. Charges in boreholes 1 through 3 are blasted. Detonation wave through line 4 passes on to detonating cord 5, as a result, first the charges in borehole 1 are blasted simultaneously. A crack is formed in the vicinity of borehole 1. After the last boreholes 2,3 are reached, after time interval τ≥ b/v, c,, where b-distance between boreholes, m; V rock mass surface velocity m/s, boreholes 2,3 are blasted. EFFECT: reduced cost of blasting and improved directivity of action of explosive charges. 2 dwg
SU4076345/03A 1986-06-12 1986-06-12 Method of contour rock mass blasting SU1417577A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU4076345/03A SU1417577A1 (en) 1986-06-12 1986-06-12 Method of contour rock mass blasting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU4076345/03A SU1417577A1 (en) 1986-06-12 1986-06-12 Method of contour rock mass blasting

Publications (1)

Publication Number Publication Date
SU1417577A1 true SU1417577A1 (en) 1995-10-10

Family

ID=60536074

Family Applications (1)

Application Number Title Priority Date Filing Date
SU4076345/03A SU1417577A1 (en) 1986-06-12 1986-06-12 Method of contour rock mass blasting

Country Status (1)

Country Link
SU (1) SU1417577A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2312299C1 (en) * 2006-03-16 2007-12-10 Государственное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" Contour charge with thrust stemming

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2312299C1 (en) * 2006-03-16 2007-12-10 Государственное образовательное учреждение высшего профессионального образования "Тихоокеанский государственный университет" Contour charge with thrust stemming

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