Comparison of Blast-Induced Damage Between Presplit and ,

Abstract This paper focuses on the comparison of damage induced by smooth blasting and presplit blasting based on the excavation of high rock slope...

The Use of Blast Timing to Improve Slope Stability 1 - ,

The Use of Blast Timing to Improve Slope Stability May 2003 3 common approach to achieving a smooth final wall is by presplitting This harnesses a well...

Senatel™ Powersplit™ - Orica Mining Services

Senatel™ Powersplit™ suits perimeter blasting applications such as smooth wall blasting, trimming and pre-splitting Market: Open Cut Coal, Open Cut ....

Application Ofpresplitting And Smooth Blasting For ,

Application Ofpresplitting And Smooth Blasting For , with smooth blasting when compared to , at an angle of I to 30 degrees to the presplit ....

A REVIEW OF THE DESIGN CRITERIA AND PRACTICAL ,

Smooth Blasting: The back holes are fired last as usual, relying on a reduced charge mass per hole for overbreak control The South African Institute of Mining and ....

Blasting damage in rock - Rocscience

Blasting damage in rock , it is far too late to attempt to remedy the situation by using smooth blasting to , face created by presplit blasting in jointed gneiss...

Controlled blasting for enhanced safety J in the ,

presplit is performed with decoupled charges, , In smooth wall blasting, , Controlled blasting for enhanced safety in the underground environment J o u r n a l P ....

Rock Excavation Methods | Drilling

Photo burden Cushion blasting is more demanding than presplit or smooth blasting for the explosives engineer because hole spacing 22 ...

Presplit Blasting and Smooth Blasting in the Slope ,

In the light of specific condition of Dahekou project, presplit blasting and smooth blasting wereadopted in the sIope excavation to achieve the desired resuIts...

Read Improved Blasting and Bench Slope Design at the Aitik ,

Read Improved Blasting and Bench Slope Design at the Aitik , For the footwall, presplit blasting in , A lighter smooth blasting pattern was tested in the ....

Rock Excavation Methods | Drilling - ptscribd

For example and explosive type used in smooth blasting are essentially the same as with presplit blasting Hole spacing for smooth blasting is slightly greater than ....

Explosives Engineers’ Guide - Dyno Nobel

the detonation of explosiv Back break Rock broken beyond the limits , used in presplit and smooth blasting Hole diameter 2PF (kg/m) Hard 06 – 09...

presplit pdf - P(1) - Docs-Engine

Left: Presplit blasting produces a smooth, stable final pit wall Right , FINAL WALL STABILITY IN METAL OPEN PIT MINES USING PRESPLIT BLASTING *Kazem ,...

A Study on the Fracture Mechanism of Smooth Blasting and ,

This paper presents a fracture mechanics model of smooth blasting and pre-split blast-ing, analyzes the function of stress waves and quasi-static pressure of ....

208 Rock Blasting - Ohio Department of Transportation

Specialized presplit blasting explosives are used , Ensure that the CA-EW-11 Item 208 Rock Blasting Site Security Plan is prepared by the Blaster 13...

Precision Presplitting: The Basics - Rock Products

Precision Presplitting: The Basics , to presplit the weak or heavily jointed with typical presplit blasting, , siltstones can be presplit to form smooth, ....

Blasting and Explosives Quick Reference Guide 2010

Presplit blasting Spacing = Hole diameter x 12 Burden = 05 x production blast burden (B) , Smooth Blasting Spacing = 15 x Hole diameter (hard rock)...

ROCK BLASTING - enemsfinalyearprojectmadeeasy

PRESPLIT BLASTING; DESCRIPTION Presplit holes are blasted before production blasts , Smooth blast holes are blasted after production blast...

presplit pdf - P(1) - Docs-Engine

Left: Presplit blasting produces a smooth, stable final pit wall Right , FINAL WALL STABILITY IN METAL OPEN PIT MINES USING PRESPLIT BLASTING *Kazem ,...

Mine Surveyor - Blast Control (Open-cut Mine Surveying ,

Blast Control (Open-cut Mine Surveying Duties) , To achieve a flat or smooth high wall, a 'pre-split' blast must be completed prior to blasting the rest of the ....

CUSHION BLASTING STUDY WHICH IMPROVES ROCK ,

CUSHION BLASTING STUDY WHICH IMPROVES ROCK SLOPE STABILITY AT LARGE EXTENT ABOUT ROCK EXCAVATION WITH EXPLOSION , and Comparison with Smooth (Presplit) Blasting,...

Rock Blasting and Associated Damages | Geoengineerorg

Summary of Surface Blasting and Damages with Analysis of Two Mitigation Techniques – Presplit and Smooth Blasting Prepared by: Charles Krolikowski...

A better way to presplit - Mining & Construction online

A better way to presplit , slopes that are close to the planned angle of the final pit wall and benches that are smooth , the most optimal presplit and blast ....

ROCK BLASTING - enemsfinalyearprojectmadeeasy

PRESPLIT BLASTING; DESCRIPTION Presplit holes are blasted before production blasts , SMOOTH BLASTING DESCRIPTION Smooth blast holes are blasted ,...

Comparison of Blast-Induced Damage Between Presplit ,

damage induced by smooth blasting and presplit blasting based on the excavation of high rock slope The whole damage process of the smooth blasting and presplit blasting...

LA-11097-MS, 'Controlled Blasting and Its Implications for ,

Final contours formed by smooth blasting, Swedish power station (from Langefors and Kihlstrom 1978, p 321) 19 , SOME RECOMMENDATIONS FOR PRESPLIT BLASTING...

A DISCUSSION ON CHARGE WEIGHT FOR SMOOTH AND PRE-SPLIT ,

The physical phenomena of smooth blasting and pre-split blasting are analyzed and compared, and the appropriate charge weight for both blastings is discussed ....

ROCK BLASTING - PROCEDURES - ENEMS ,

ROCK BLASTING Drilling and Blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation...

Improved Blasting and Bench Slope Design at the Aitik Mine

For the footwall, presplit blasting in inclined (70°) , An extensive project on smooth blasting was conducted in the period of 1991 to 1996 The project was...

Tunnelling and Underground Space Technology

Pre-split blasting Smooth blasting In situ stress abstract The choice of a reasonable excavation sequence and contour blasting method is one of the key techniques...