Comparison of Presplit and Smooth Blasting Methods for,
e primary difference between presplit and smooth blasting is the firing sequence of contour holes relative to the main blasting area [15]. As shown[PDF] Comparison of Presplit and Smooth Blasting Methods,,23-04-2019· To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices. The vibration results illustrate that at the samesmooth blasting presplit - adca,control blasts, comprising of three smooth blasts and one presplit blast were conducted at the Orphan Boy Mine (an underground mine at Montana Tech). Based on the half-barrels that resulted, the success of the three smooth blasting was less than 20%. The presplit blasting resulted in extensive fracturing of the adjoining rock mass.Comparison of Blast-Induced Damage Between Presplit,14-09-2013· The whole damage process of the smooth blasting and presplit blasting excavation method is studied by using a cumulative blasting damageComparison of Presplit and Smooth Blasting Methods for,,To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices. The vibration results illustrate that at the same monitoring distanceSummary of Surface Blasting with Comparison of Two,,Mitigation – Presplit Blasting Main Objective – Form a free face before main production blast Drill closely spaced holes and lightly pack with explosives and detonate first Takes advantage of same mechanisms in smooth blasting except more contained Mitigation Hu et al (2013) Mitigation Hoek (2007) Case Studies
smooth blasting presplit - adca
control blasts, comprising of three smooth blasts and one presplit blast were conducted at the Orphan Boy Mine (an underground mine at Montana Tech). Based on the half-barrels that resulted, the success of the three smooth blasting was less than 20%. The presplit blasting resulted in extensive fracturing of the adjoining rock mass.[PDF] Comparison of Presplit and Smooth Blasting Methods,,23-04-2019· To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices. The vibration results illustrate that at the sameCN203298660U - Pre-splitting and smooth blasting coupling,,The utility model discloses a pre-splitting and smooth blasting coupling-free charging auxiliary device which comprises a blast hole and a guide rod arranged in the blast hole. The cross section of the guide rod is in an I shape, explosive partition plates and a blocking article supporting plate are assembled on the guide rod in sequence from bottom to top, a cover plateComparison of Presplit and Smooth Blasting Methods for,,To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices.Summary of Surface Blasting and Damages with Analysis of,,Comparison of Blast-Induced Damage between Presplit and Smooth Blasting of High Rock Slope by Hu et al. (2013) Advance of computers has allowed for more modeling techniques over the last decade. This is noted by the use of numerical modeling comparing the damages of presplit and smooth blasting for the study done by Hu et al.(PDF) Design of controlled blasting (pre-splitting) in,,Normal production blast consists of detonation of 6–8 rows involving 140–200 holes in a blast round. A master plan of the pre-split, The shortcoming of conventional smooth blasting in,
Techniques of Controlled Blasting - SlideShare
17-12-2009· 4. Following are the techniques of controlled blasting: Line drilling, Trim (Cushion) blasting, Smooth (contour or perimeter) blasting, Pre-splitting, Selecting and employing various parameters of blast design, using modern technology, Precise and accurate timing delays, Muffle blasting at critical and congested areas. 4. 5.Explosives Engineers’ Guide,Presplit blasting Spacing = Hole diameter x 12 Burden = 0.5 x production blast burden (B) Uncharged length at top = 10 x D Powder factor = 0.5kg per square metre of face Do not stem holes. Fire all holes on the same delay, or in groups of ≥ 5 holes Smooth blasting Spacing = 15 x Hole diameter (hard rock) 20 x Hole diameter (soft rock)FINAL WALL STABILITY IN METAL OPEN PIT MINES USING,,The common controlled blasting techniques are line, smooth, cushion and presplit blasting. The latter technique has become the most widely used in metal open pit mines, due to good results and its operational nature in hard rock formation. PRESPLIT BLASTING Presplit blasting is an effective technique for stabilizing the final wall in open pit,Rock blasting for mining - SlideShare,28-07-2017· 85 Explosive Charge Depending upon the rock characteristics and spacing used for the presplit, charge loads will vary. Smooth Blasting The term “smooth blasting” refers to lightly loaded holes that have been drilled along excavation limits and are shot after the main excavation is removed. 86.smooth blasting presplit - adca,control blasts, comprising of three smooth blasts and one presplit blast were conducted at the Orphan Boy Mine (an underground mine at Montana Tech). Based on the half-barrels that resulted, the success of the three smooth blasting was less than 20%. The presplit blasting resulted in extensive fracturing of the adjoining rock mass.Comparison of Presplit and Smooth Blasting Methods for,,To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices.
Comparison of Presplit and Smooth Blasting Methods for,
To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices. The vibration results illustrate that at the same monitoring distanceFigure 4 from Comparison of Presplit and Smooth Blasting,,DOI: 10.1155/2019/3743028 Corpus ID: 150174109. Comparison of Presplit and Smooth Blasting Methods for Excavation of Rock Wells @article{Zhou2019ComparisonOP, title={Comparison of Presplit and Smooth Blasting Methods for Excavation of Rock Wells}, author={Zilong Zhou and Ruishan Cheng and X. Cai and Jinlong Jia and Wei-hua Wang},Numerical and experimental investigation of blasting,,10-04-2018· Because the conventional presplit and smooth blasting methods cannot achieve ideal damage control, a combination presplit-smooth blasting method was proposed. The key to the optimized approach is the application of different contour blasting methods at different positions, allowing the advantages of both presplit and smooth blasting methods to beSummary of Surface Blasting and Damages with Analysis of,,Comparison of Blast-Induced Damage between Presplit and Smooth Blasting of High Rock Slope by Hu et al. (2013) Advance of computers has allowed for more modeling techniques over the last decade. This is noted by the use of numerical modeling comparing the damages of presplit and smooth blasting for the study done by Hu et al.Explosives Engineers’ Guide,Presplit blasting Spacing = Hole diameter x 12 Burden = 0.5 x production blast burden (B) Uncharged length at top = 10 x D Powder factor = 0.5kg per square metre of face Do not stem holes. Fire all holes on the same delay, or in groups of ≥ 5 holes Smooth blasting Spacing = 15 x Hole diameter (hard rock) 20 x Hole diameter (soft rock)FINAL WALL STABILITY IN METAL OPEN PIT MINES USING,,The common controlled blasting techniques are line, smooth, cushion and presplit blasting. The latter technique has become the most widely used in metal open pit mines, due to good results and its operational nature in hard rock formation. PRESPLIT BLASTING Presplit blasting is an effective technique for stabilizing the final wall in open pit,
Rock blasting for mining - SlideShare
28-07-2017· 85 Explosive Charge Depending upon the rock characteristics and spacing used for the presplit, charge loads will vary. Smooth Blasting The term “smooth blasting” refers to lightly loaded holes that have been drilled along excavation limits and are shot after the main excavation is removed. 86.A better way to presplit - Mining & Construction online,03-08-2011· A fleet consisting of large drills and ROC rigs is, in my view, the most optimal presplit and blast hole solution on the market. And in these tight economic times when it is important to keep operating costs at rock bottom, this is one area in the mining process where fortunes can be saved.,,,,
