A FIELD STUDY OF TRENCH BLASTING IN ROCK MASSES WITH DISCONTINUITY

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MORTAZAVI ALI; RAJAEIAN H.; ADIBI N.A.

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Journal Paper

Paper Information

Journal: JOURNAL OF ENERGETIC MATERIALS Year:2008 | Volume:3 | Issue:1 Page(s): 69-80

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Title

A FIELD STUDY OF TRENCH BLASTING IN ROCK MASSES WITH DISCONTINUITY

Author(s)

MORTAZAVI ALI | RAJAEIAN H. | ADIBI N.A. | Issue Writer Certificate

Keywords

TRENCH BLASTING

EXPLOSIVE

ROCK MASS

ROCK BLASTING

CONTROLLED BLASTING

Abstract

Excavation of trenches by blasting is an important application of EXPLOSIVEs. The number of pipeline trenches blasted during the recent years has increased in many countries. However, excavation of narrow trenches by blasting has had limited application. The intention of this study was to assess the feasibility of shallow and narrow trench excavation in rock media by blasting. One major application of narrow trenches is the placement of fiber optic communication cables. This paper presents the results of a blasting research work on construction of such channels. As a result of this work, a channel, 40 cm in width and 90 cm in depth, was excavated successfully. The specific charge used varied between 1.66 - 2.89 kg/m3 using gelatin dynamite as EXPLOSIVE charge. The initiation devices were of short delay Nonel, electric detonators (instantaneous and half second), and detonating cord (5gr/m & 10gr/m). The nominal burden was 50Cln and the effective burden was 43.8 cm. The blast hole spacing and sub drilling were 48 cm and 20 cm, respectively.

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APA: Copy

MORTAZAVI, ALI, RAJAEIAN, H., & ADIBI, N.A.. (2008). A FIELD STUDY OF TRENCH BLASTING IN ROCK MASSES WITH DISCONTINUITY. JOURNAL OF ENERGETIC MATERIALS, 3(1), 69-80. SID. https://sid.ir/paper/555103/en

Vancouver: Copy

MORTAZAVI ALI, RAJAEIAN H., ADIBI N.A.. A FIELD STUDY OF TRENCH BLASTING IN ROCK MASSES WITH DISCONTINUITY. JOURNAL OF ENERGETIC MATERIALS[Internet]. 2008;3(1):69-80. Available from: https://sid.ir/paper/555103/en

IEEE: Copy

ALI MORTAZAVI, H. RAJAEIAN, and N.A. ADIBI, “A FIELD STUDY OF TRENCH BLASTING IN ROCK MASSES WITH DISCONTINUITY,” JOURNAL OF ENERGETIC MATERIALS, vol. 3, no. 1, pp. 69–80, 2008, [Online]. Available: https://sid.ir/paper/555103/en

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