Blast Design Formulas
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7 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE COMMON FORMULAS USED FOR BLAST DESIGN Absolute Bulk Strength (ABS) Absolute Weight Strength (AWS) Actual Scaled Distance Base-Charge Length Burden Deck Stemming -For Dry Holes -For Wet Holes Face Height Hole-to-Hole Delay Time Loading Density Maximum Charge Weight per Delay Minimum Distance Powder Factor -Volume of Rock Input -Weight of Rock Input Pre-Splitting Formulas for Air-Decked Charges -Spacing of Air-Decked Charges -Weight of Air-Decked Charges -Stemming Column Length Pre-Splitting Formulas for De-Coupled Charges -Linear Charge Weight -Spacing between Pre-Split Holes Pressure Formula Relative Weight Strength (RWS) Resistance Formulas -For Paralle Circuits -For Series Circuits Row-to-Row Delay Time Stone Stemming Particle Size Spacing -Instant -Delayed Sub-Drilling “Supersonic” Face Velocity Top-Stemming Length Water Displacement Weight of Rock per Blast Hole Vibration Level Prediction -Peak Particle Velocity Prediction -Site Speci c Ground Transmission Constant Volume of Rock per Blast Hole BLAST DESIGN FORMULAS ................................................................................ ....8 ................................................................................ 8 ................................................................................
............8 ................................................................................ ...............8 ................................................................................ ..................................9 ................................................................................ ......................9 ................................................................................ ...........................9 ................................................................................ ..........9 ................................................................................ ....................10 ..........................................................................10 ................................................................................ ..................10 ................................................................................ ......................10 ..........................................................11 .........................................................11 ................................................................................ ..................11 ...............................................................................1 2 ................................................................................ .............1 2 ................................................................................ .........12 ................................................................................ ..12 ................................................................................ ...............................13 ................................................................................ ..........................1 3 ................................................................................ .....13 ................................................................................ ...........13 ................................................................................ ..............14 ................................................................................ .14 ................................................................................ .......14 ................................................................................ 14 8 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE BLAST DESIGN FORMULAS Absolute Bulk Strength (ABS) ABSE = Absolute bulk strength of the explosive [cal/cc] AWSE = Absolute weight strength of the explosive [cal/g] dE = Density of the explosive [g/cm3] E ABS E E AWS d VARIABLES and [UNITS] Absolute Weight Strength (AWS) E E E d RBS AWS 462 . 7 AWSE = Absolute weight strength of the explosive [cal/g] RBSE = Relative bulk strength of the explosive [ANFO = 100] dE = Density of the explosive [g/cm3 ] VARIABLES and [UNITS] Acutual Scaled Distance Formula WD SD Actual Scaled Distance W SD D Minimum Distance 2 SD D W Maximum Charge Weight per Delay SD = Scaled distance factor W = Charge weight per delay [ lb ] D = Distance [ft]
VARIABLES and [UNITS] Eb = Length of base charge of high density explosives [ft] B = Average burden [ft] J = Sub-drilling depth [ft] Base-Charge Length Formula J B Eb 0.3 0.5 VARIABLES and [UNITS] FORMULA NAME VARIABLES and [UNITS] FORMULA Variables used in formula and required units in [brackets]. If input variables are not in required units, then you must use the unit conversion tables. HOW TO READ FORMULAS 9 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE B = Burden [ft] de = Density of the explosives [g/cm3] dr = Density of the rock [g/cm3] De = Diameter of fully coupled explosive column [in] Burden Formula r e e d d D B 1.5 2 VARIABLES and [UNITS] H = Face Height [ft] D = Blast-hole Diameter [in] D H Face Height Formula 5 10 VARIABLES and [UNITS] BLAST DESIGN FORMULAS Td= Minimum length of stone deck consisting of particles of size Ts [ft] D = Blast-hole diameter [in] D Td 5 . 0 For Wet Holes For Dry Holes D Td 0 . 1 Deck Stemming Formula VARIABLES and [UNITS] Hole-to-Hole Delay Time Formula S Dhth 5 0 Dhth = Delay time between holes in a row [ms] S = Spacing between holes in a row [ft] Hole-to-Hole Delay Times to Improve Fragmentation ms/ft Sands, Loams, Marls and Coals 1.8 - 2.1 Some Limestones, Rock Shale and some Shales 1.5 - 1.8 Compact Limestones and Marbles, some Granites and Basalts, Quartzite Rocks and some Gneisses and Gabbros 1.2 - 1.5 0.9 - 1.2 Rock Type ms/ft Diabase, Diabase Porphyrites, Compact Gneisses, and Mica Schists and Magnetites VARIABLES and [UNITS] Leading underground mining technology. 10 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE 2 SD D W Maximum Charge Weight per Delay SD = Scaled distance factor W = Charge weight per delay [ lb ] D = Distance [ft] VARIABLES and [UNITS] W SD D Minimum Distance Formula SD = Scaled distance factor W = Charge weight per delay [lb] D = Distance [ft] VARIABLES and [UNITS] V W PF e PF = Powder factor [lb/yd ] 3 We = Total weight of explosives used in blast [lb] V = Total volume of rock generated in blast [yd3 ] Powder Factor Formula er WW PF PF = Powder factor [t/lb] Wr = Total weight of rock generated in blast [t] We = Total weight of explosives used in blast [lb] VARIABLES and [UNITS] VARIABLES and [UNITS] Volume of Rock Weight of Rock BLAST DESIGN FORMULAS dl = Explosives loading density [lb /ft] De = Diameter of explosives column [in] de = Density of explosives [g/cm3 ] Loading Density Formula e e l d D d 2 0.3404 VARIABLES and [UNITS] Loading a blast on an iron ore range. 11 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE h L S W 12 . 0 08 . 0 W = Weight of air-deck charge [lb] S = Spacing between blast-holes [ft] Lh = Length of blast-hole [ft] D S 0 . 2 5 . 1 S = Spacing between air-decked holes [ft] D = Diameter of blast-hole [in] D T 2 . 1 0 . 1 T = Stemming column length [ft] D = Diameter of blast-hole [in] Pre-Splitting Formulas for Air-Decked Charges VARIABLES and [UNITS] VARIABLES and [UNITS] VARIABLES and [UNITS] Spacing of Air-Decked Charges Weight of Air-Decked Charges Stemming Column Length Wl = Linear charge weight for pre-splitting explosive [lb/ft] D = Diameter of blast-hole [in] S= Spacing between pre-split holes [ft] D = Diameter of blast-hole [in] Pre-Splitting Formulas for De-Coupled Charges Linear Charge Weight Spacing between Pre-Split Holes 2 D S 2.8 2 D Wl 28 VARIABLES and [UNITS] VARIABLES and [UNITS] Pressure Formula P = Pressure [kbar] VOD = Velocity of detonation of explosive [ft/sec] dE = Density of explosive [g/cm3 ] E d VOD P 2 0.000000233 VARIABLES and [UNITS] BLAST DESIGN FORMULAS 12 ©
2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE Relative Weight Strength (RWS) E RWS RWSE = Relative weight strength of the explosive [ANFO = 100] AWSE = Absolute weight strength of the explosive [cal/g] E AWS 91,000 VARIABLES and [UNITS] Resistance Formulas n total R R R R R 1 ... 1 1 1 1 3 2 1 For Parallel Circuits n total R R R R R ... 3 2 1 For Series Circuits Rtotal = Total resistance of the electrical circuit [ ] R1... Rn = Resistance of individual blasting caps or circuit branches [ ] VARIABLES and [UNITS] BLAST DESIGN FORMULAS Row-to-Row Delay Time Formula Drtr = Delay time between consecutive rows [ms] B = Maximum burden in front of a row of holes [ft] Violent excessive air-blast and back-break 2 High pile close to face, moderate air-blast and back-break 2 - 3 Average pile height, average air-blast and back-break 3 - 4 Scattered pile with minimum back-break 4 - 6 Effects ms/ft Effects of Various Row-to-Row Delays B Drtr 15 2 ms/ft VARIABLES and [UNITS] Stone Stemming Particle Size Formula Ts = Clean crushed stone stemming particle size [in] D = Blast-hole diameter [in] 20 D Ts 12 VARIABLES and [UNITS] Bulk trucks preparing for another day on the job. 13 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE H = Face height [ft] B = Burden [ft] S = Blast-hole spacing [ft] Spacing Formulas B S 2.0 ) 2 ( B H S HB 4 If: HB<4 If: 8 ) 7 ( B H S 3 B S 4 . 1 Instant Delayed VARIABLES and [UNITS] BLAST DESIGN FORMULAS B = Burden [ft] J = Sub-drilling [ft] Sub-Drilling Formula B J 0.2 0.5 VARIABLES and [UNITS] Dmin = In order to avoid air-blast from "supersonic" lateral face velocity, the delay between holes must be more than Dmin [ms] S = Spacing between blast holes [ft] "Supersonic" Face Velocity Formula min S D 1.127 VARIABLES and [UNITS] B = Burden [ft] T = Top stemming length [ft] B T 3 . 1 7 . 0 Top Stemming Length Formula VARIABLES and [UNITS] Industry’s leading Detonating Cord 14 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE BLAST DESIGN FORMULAS 27 H S B V V = Bank volume of rock per blast-hole [yd3 ] B = Burden [ft] S = Spacing [ft] H = Face height [ft] Volume of Rock per Blast Hole Formula VARIABLES and [UNITS] r d V W W = Weight of rock generated per blast-hole [t] V = Bank volume of rock generated per blast-hole [yd3] dr = Bank density of rock [t/yd3] Weight of Rock per Blast Hole Formula VARIABLES and [UNITS] Vibration Level Predictation Formulas 6 . 1 SD K PPV Peak Particle Velocity Prediction PPV = Peak particle velocity [in/s] K = Ground transmission constant [K=160 if no other seismic data is available] SD = Scaled distance factor 6 . 1 SD PPV K Site Specific Ground Transmission Constant PPV = Peak particle velocity [in/s] K = Ground transmission constant SD = Scaled distance factor VARIABLES and [UNITS] VARIABLES and [UNITS] Water Displacement Formula 2 1 hc c wDD L L C C = Number of explosives cartridges required to rise above standing water Lw = Length of the standing water column [ft] Lc = Length of one explosives cartridge [ft] Dc = Diameter of explosives cartridges [in] Dh = Diameter of blast-hole [in] VARIABLES and [UNITS] HEET Truck on display at an open house in 2001 Blast Design FormulasDownload this Document for FreePrintMobileCollectionsReport DocumentReport this document? Please tell us reason(s) for reporting this document
Spam or junk Porn adult content Hateful or offensive If you are the copyright owner of this document and want to report it, please follow these directions to submit a copyright infringement notice. Report Cancel This is a private document. Info and Rating Reads:32,492Uploaded:03/29/2007Category:Uncategorized.Rated:18 Ratings()Copyright:Attribution Non-commercial Blast Design Formulas for opencast mining. for more visit www.blastconsulting.co.za ReferenceDesignBlastingMiningScience-EngineeringReference-Cheat-SheetsCareer-Job -Search(more tags)ReferenceDesignBlastingMiningScience-EngineeringReference-Cheat-SheetsCaree r-Job-Searchcharge calculationcalculate psipwdernad prefactor explosivesrequiredvelocity predictionmining engineeringdrilling formulabalasting degsign(fewer)FollowMarco Olivier Share & Embed Related Documents PreviousNext p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. More from this user PreviousNext8 p.1 p.10 p.2 p.3 p.2 p.8 p.69 p.2 p. Recent Readcasters Add a Comment Submitshare:Characters: 400 Forresterdobsonleft a comment every time I try and download, this link says forbidden whats up with that..ps im a Quarry guy 05 / 03 / 2010 Reply Report vijay3janleft a comment please reply immediately. 07 / 03 / 2009 Reply Report vijay3janleft a comment hi marco, can you give suggesion for blasting in cracked area in surface mine. 07 / 03 / 2009 Reply Report widouleft a comment hi Marco, Iwant to know more about blast designs (tunnel) thanks a lot 11 / 28 / 2008 Reply Report ngoctugtleft a comment I m a tunnel man. Provide all blasting design form, please. E-mail: [email protected] 10 / 17 / 2008 Reply Report mangondozaeleft a comment its not easy to download the formulas 06 / 30 / 2008 Reply Report cksinghleft a comment provide blasting design for tunnel 06 / 12 / 2008 Reply Report cksinghleft a comment i am working in tunneling project at sikkim kindly provide different type of drilling&blasting pattern detail and explosive detail, also provide types of explosive for effective blasting. 06 / 12 / 2008 Reply Report raj_miningleft a comment i am working in a limestone mine. here during blasting boulder generation is more due to cavities present filled with clay.suggest method of blasting to reduce boulder generation. 05 / 14 / 2008 Reply Report
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7 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE COMMON FORMULAS USED FOR BLAST DESIGN Absolute Bulk Strength (ABS) Absolute Weight Strength (AWS) Actual Scaled Distance Base-Charge Length Burden Deck Stemming -For Dry Holes -For Wet Holes Face Height Hole-to-Hole Delay Time Loading Density Maximum Charge Weight per Delay Minimum Distance Powder Factor -Volume of Rock Input -Weight of Rock Input Pre-Splitting Formulas for Air-Decked Charges -Spacing of Air-Decked Charges -Weight of Air-Decked Charges -Stemming Column Length Pre-Splitting Formulas for De-Coupled Charges -Linear Charge Weight -Spacing between Pre-Split Holes Pressure Formula Relative Weight Strength (RWS) Resistance Formulas -For Paralle Circuits -For Series Circuits Row-to-Row Delay Time Stone Stemming Particle Size Spacing -Instant -Delayed Sub-Drilling “Supersonic” Face Velocity Top-Stemming Length Water Displacement Weight of Rock per Blast Hole Vibration Level Prediction -Peak Particle Velocity Prediction -Site Speci c Ground Transmission Constant Volume of Rock per Blast Hole BLAST DESIGN FORMULAS ................................................................................ ....8 ................................................................................ 8 ................................................................................
............8 ................................................................................ ...............8 ................................................................................ ..................................9 ................................................................................ ......................9 ................................................................................ ...........................9 ................................................................................ ..........9 ................................................................................ ....................10 ..........................................................................10 ................................................................................ ..................10 ................................................................................ ......................10 ..........................................................11 .........................................................11 ................................................................................ ..................11 ...............................................................................1 2 ................................................................................ .............1 2 ................................................................................ .........12 ................................................................................ ..12 ................................................................................ ...............................13 ................................................................................ ..........................1 3 ................................................................................ .....13 ................................................................................ ...........13 ................................................................................ ..............14 ................................................................................ .14 ................................................................................ .......14 ................................................................................ 14 8 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE BLAST DESIGN FORMULAS Absolute Bulk Strength (ABS) ABSE = Absolute bulk strength of the explosive [cal/cc] AWSE = Absolute weight strength of the explosive [cal/g] dE = Density of the explosive [g/cm3] E ABS E E AWS d VARIABLES and [UNITS] Absolute Weight Strength (AWS) E E E d RBS AWS 462 . 7 AWSE = Absolute weight strength of the explosive [cal/g] RBSE = Relative bulk strength of the explosive [ANFO = 100] dE = Density of the explosive [g/cm3 ] VARIABLES and [UNITS] Acutual Scaled Distance Formula WD SD Actual Scaled Distance W SD D Minimum Distance 2 SD D W Maximum Charge Weight per Delay SD = Scaled distance factor W = Charge weight per delay [ lb ] D = Distance [ft]
VARIABLES and [UNITS] Eb = Length of base charge of high density explosives [ft] B = Average burden [ft] J = Sub-drilling depth [ft] Base-Charge Length Formula J B Eb 0.3 0.5 VARIABLES and [UNITS] FORMULA NAME VARIABLES and [UNITS] FORMULA Variables used in formula and required units in [brackets]. If input variables are not in required units, then you must use the unit conversion tables. HOW TO READ FORMULAS 9 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE B = Burden [ft] de = Density of the explosives [g/cm3] dr = Density of the rock [g/cm3] De = Diameter of fully coupled explosive column [in] Burden Formula r e e d d D B 1.5 2 VARIABLES and [UNITS] H = Face Height [ft] D = Blast-hole Diameter [in] D H Face Height Formula 5 10 VARIABLES and [UNITS] BLAST DESIGN FORMULAS Td= Minimum length of stone deck consisting of particles of size Ts [ft] D = Blast-hole diameter [in] D Td 5 . 0 For Wet Holes For Dry Holes D Td 0 . 1 Deck Stemming Formula VARIABLES and [UNITS] Hole-to-Hole Delay Time Formula S Dhth 5 0 Dhth = Delay time between holes in a row [ms] S = Spacing between holes in a row [ft] Hole-to-Hole Delay Times to Improve Fragmentation ms/ft Sands, Loams, Marls and Coals 1.8 - 2.1 Some Limestones, Rock Shale and some Shales 1.5 - 1.8 Compact Limestones and Marbles, some Granites and Basalts, Quartzite Rocks and some Gneisses and Gabbros 1.2 - 1.5 0.9 - 1.2 Rock Type ms/ft Diabase, Diabase Porphyrites, Compact Gneisses, and Mica Schists and Magnetites VARIABLES and [UNITS] Leading underground mining technology. 10 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE 2 SD D W Maximum Charge Weight per Delay SD = Scaled distance factor W = Charge weight per delay [ lb ] D = Distance [ft] VARIABLES and [UNITS] W SD D Minimum Distance Formula SD = Scaled distance factor W = Charge weight per delay [lb] D = Distance [ft] VARIABLES and [UNITS] V W PF e PF = Powder factor [lb/yd ] 3 We = Total weight of explosives used in blast [lb] V = Total volume of rock generated in blast [yd3 ] Powder Factor Formula er WW PF PF = Powder factor [t/lb] Wr = Total weight of rock generated in blast [t] We = Total weight of explosives used in blast [lb] VARIABLES and [UNITS] VARIABLES and [UNITS] Volume of Rock Weight of Rock BLAST DESIGN FORMULAS dl = Explosives loading density [lb /ft] De = Diameter of explosives column [in] de = Density of explosives [g/cm3 ] Loading Density Formula e e l d D d 2 0.3404 VARIABLES and [UNITS] Loading a blast on an iron ore range. 11 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE h L S W 12 . 0 08 . 0 W = Weight of air-deck charge [lb] S = Spacing between blast-holes [ft] Lh = Length of blast-hole [ft] D S 0 . 2 5 . 1 S = Spacing between air-decked holes [ft] D = Diameter of blast-hole [in] D T 2 . 1 0 . 1 T = Stemming column length [ft] D = Diameter of blast-hole [in] Pre-Splitting Formulas for Air-Decked Charges VARIABLES and [UNITS] VARIABLES and [UNITS] VARIABLES and [UNITS] Spacing of Air-Decked Charges Weight of Air-Decked Charges Stemming Column Length Wl = Linear charge weight for pre-splitting explosive [lb/ft] D = Diameter of blast-hole [in] S= Spacing between pre-split holes [ft] D = Diameter of blast-hole [in] Pre-Splitting Formulas for De-Coupled Charges Linear Charge Weight Spacing between Pre-Split Holes 2 D S 2.8 2 D Wl 28 VARIABLES and [UNITS] VARIABLES and [UNITS] Pressure Formula P = Pressure [kbar] VOD = Velocity of detonation of explosive [ft/sec] dE = Density of explosive [g/cm3 ] E d VOD P 2 0.000000233 VARIABLES and [UNITS] BLAST DESIGN FORMULAS 12 ©
2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE Relative Weight Strength (RWS) E RWS RWSE = Relative weight strength of the explosive [ANFO = 100] AWSE = Absolute weight strength of the explosive [cal/g] E AWS 91,000 VARIABLES and [UNITS] Resistance Formulas n total R R R R R 1 ... 1 1 1 1 3 2 1 For Parallel Circuits n total R R R R R ... 3 2 1 For Series Circuits Rtotal = Total resistance of the electrical circuit [ ] R1... Rn = Resistance of individual blasting caps or circuit branches [ ] VARIABLES and [UNITS] BLAST DESIGN FORMULAS Row-to-Row Delay Time Formula Drtr = Delay time between consecutive rows [ms] B = Maximum burden in front of a row of holes [ft] Violent excessive air-blast and back-break 2 High pile close to face, moderate air-blast and back-break 2 - 3 Average pile height, average air-blast and back-break 3 - 4 Scattered pile with minimum back-break 4 - 6 Effects ms/ft Effects of Various Row-to-Row Delays B Drtr 15 2 ms/ft VARIABLES and [UNITS] Stone Stemming Particle Size Formula Ts = Clean crushed stone stemming particle size [in] D = Blast-hole diameter [in] 20 D Ts 12 VARIABLES and [UNITS] Bulk trucks preparing for another day on the job. 13 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE H = Face height [ft] B = Burden [ft] S = Blast-hole spacing [ft] Spacing Formulas B S 2.0 ) 2 ( B H S HB 4 If: HB<4 If: 8 ) 7 ( B H S 3 B S 4 . 1 Instant Delayed VARIABLES and [UNITS] BLAST DESIGN FORMULAS B = Burden [ft] J = Sub-drilling [ft] Sub-Drilling Formula B J 0.2 0.5 VARIABLES and [UNITS] Dmin = In order to avoid air-blast from "supersonic" lateral face velocity, the delay between holes must be more than Dmin [ms] S = Spacing between blast holes [ft] "Supersonic" Face Velocity Formula min S D 1.127 VARIABLES and [UNITS] B = Burden [ft] T = Top stemming length [ft] B T 3 . 1 7 . 0 Top Stemming Length Formula VARIABLES and [UNITS] Industry’s leading Detonating Cord 14 © 2002 AUSTIN POWDER COMPANY THE BLASTER’S GUIDE BLAST DESIGN FORMULAS 27 H S B V V = Bank volume of rock per blast-hole [yd3 ] B = Burden [ft] S = Spacing [ft] H = Face height [ft] Volume of Rock per Blast Hole Formula VARIABLES and [UNITS] r d V W W = Weight of rock generated per blast-hole [t] V = Bank volume of rock generated per blast-hole [yd3] dr = Bank density of rock [t/yd3] Weight of Rock per Blast Hole Formula VARIABLES and [UNITS] Vibration Level Predictation Formulas 6 . 1 SD K PPV Peak Particle Velocity Prediction PPV = Peak particle velocity [in/s] K = Ground transmission constant [K=160 if no other seismic data is available] SD = Scaled distance factor 6 . 1 SD PPV K Site Specific Ground Transmission Constant PPV = Peak particle velocity [in/s] K = Ground transmission constant SD = Scaled distance factor VARIABLES and [UNITS] VARIABLES and [UNITS] Water Displacement Formula 2 1 hc c wDD L L C C = Number of explosives cartridges required to rise above standing water Lw = Length of the standing water column [ft] Lc = Length of one explosives cartridge [ft] Dc = Diameter of explosives cartridges [in] Dh = Diameter of blast-hole [in] VARIABLES and [UNITS] HEET Truck on display at an open house in 2001 Blast Design FormulasDownload this Document for FreePrintMobileCollectionsReport DocumentReport this document? Please tell us reason(s) for reporting this document
Spam or junk Porn adult content Hateful or offensive If you are the copyright owner of this document and want to report it, please follow these directions to submit a copyright infringement notice. Report Cancel This is a private document. Info and Rating Reads:32,492Uploaded:03/29/2007Category:Uncategorized.Rated:18 Ratings()Copyright:Attribution Non-commercial Blast Design Formulas for opencast mining. for more visit www.blastconsulting.co.za ReferenceDesignBlastingMiningScience-EngineeringReference-Cheat-SheetsCareer-Job -Search(more tags)ReferenceDesignBlastingMiningScience-EngineeringReference-Cheat-SheetsCaree r-Job-Searchcharge calculationcalculate psipwdernad prefactor explosivesrequiredvelocity predictionmining engineeringdrilling formulabalasting degsign(fewer)FollowMarco Olivier Share & Embed Related Documents PreviousNext p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. p. More from this user PreviousNext8 p.1 p.10 p.2 p.3 p.2 p.8 p.69 p.2 p. Recent Readcasters Add a Comment Submitshare:Characters: 400 Forresterdobsonleft a comment every time I try and download, this link says forbidden whats up with that..ps im a Quarry guy 05 / 03 / 2010 Reply Report vijay3janleft a comment please reply immediately. 07 / 03 / 2009 Reply Report vijay3janleft a comment hi marco, can you give suggesion for blasting in cracked area in surface mine. 07 / 03 / 2009 Reply Report widouleft a comment hi Marco, Iwant to know more about blast designs (tunnel) thanks a lot 11 / 28 / 2008 Reply Report ngoctugtleft a comment I m a tunnel man. Provide all blasting design form, please. E-mail: [email protected] 10 / 17 / 2008 Reply Report mangondozaeleft a comment its not easy to download the formulas 06 / 30 / 2008 Reply Report cksinghleft a comment provide blasting design for tunnel 06 / 12 / 2008 Reply Report cksinghleft a comment i am working in tunneling project at sikkim kindly provide different type of drilling&blasting pattern detail and explosive detail, also provide types of explosive for effective blasting. 06 / 12 / 2008 Reply Report raj_miningleft a comment i am working in a limestone mine. here during blasting boulder generation is more due to cavities present filled with clay.suggest method of blasting to reduce boulder generation. 05 / 14 / 2008 Reply Report
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