The following packages are presently on line, and are being offered at the indicated prices; see the Blaspa Web site for other subroutines being prepared for access on the web. 

Each package includes access to a given number of subroutines; what can be simulated with each subroutine is reviewed below.  During his simulation study, a user calls on any given subroutine, as needed; this simulation debits the indicated number of Simulation Points (SP) from the total in his account, till all the SP purchased are used. 

BASIC SIMULATION  PACKAGE: 

#

Usage Simulation Points

Access fee ( for 1 year )

1

Displacement profile & Average rock velocity

2 SP

2

Back & front grade Velocity

2 SP

3	Shock wave stress Chosen Point	1 SP
4	Shock wave stress Contour	2 SP

The $2,000 access fee allows 40 trial SP, i.e. about 10 simulations

$2,000

 PRICE: $2,000 for one seat and 40 SP (about 10 simulations) .

 OPTIONAL OTHER SIMULATORS: 

1

Semi-static stress field at the face ( Maximum Burden )

+1 SP

$500

2

Minimum & Optimal delay (DSB)

+1 SP

$500

3

Coal protection

+2 SP

$1,000

4

Wall control

+1 SP

$1,000

5

Quality Factors

2 SP

$500

6

*Explosives Rating

2 SP

$1,000

7

*Preshear

7 SP

$750

8

*Cast blasting ( vertical holes )

12 SP

$1,000

9

Record of 10 study’s and standard’s

$2,000

 Note: The simulators marked with * are not available on the WEB at this time.

 SP ADDITIONAL TO 40 TRIAL SP:  

1

Additional 400 SP (about 100 simulations)

$3,000

2

Additional 1000 SP (about 250 simulations)

$6,000

3

Additional 2500 SP (about 600 simulations)

$12,000

·        If a user runs out of SP within his license period, he can purchase additional SP in the above section.

·        Quotation for larger quantities of SP is available on request.

·        At the end of a license period, the remaining unused SP will be transferred on renewal of the license.

 ADDITIONAL EXPLOSIVES

The standard explosive bank on the web counts about 20 explosives.  Other explosives can be added to your private explosive bank at the following rates: 

1

Explosive presently available in the Blaspa explosive bank

$200 per explosive

2

Explosive not available in the Blaspa explosive bank

$500 per explosive

ADDITIONAL ROCKS 

The standard rock bank on the web counts about 20 rocks.  Other rocks can be added to your private rock bank at the following rates: 

1

The mine provides the rock properties

$50 per rock

2

Rocks samples are sent to Blaspa

$500 per rock

 

Blast studies usually require from 10 to 50 simulations, depending on the answer being sought (e.g. maximum pattern) and the cost optimization being sought (e. g. easy mucking at minimum cost).  Simulation blast studies done on a consulting basis usually cost about $6,000 to $15,000.

 

 

 

 

 

 

All rates and content are subject to change without notice.
 

Short description of the subroutines already on the web: 

1. Displacement profiles:  For a given bench blast procedure, the movement of the rock mass is simulated and displayed graphically at the face and inside the bench, at a time such as say 300 msec. after initiation; the numerical data can also be printed.  When doing simulation blast studies, this subroutine tends to be a most useful tool to evaluate and improve the mucking, as well as to address the aspect of horizontal dilution.  Experience shows that, once blocks, toe, etc are under control, producing loose muck is by far what a mine or quarry needs most for efficient operation. 

2. Shock wave stress contours:  For a given bench blast procedure, the contour of any given shock wave stress level T is simulated and displayed inside the bench.  With T=To, the dynamic resistance of the given rock, it is possible to predict blocks in the collar zone, toe, possible back-break, etc.  With other values of T, it is possible to improve the fragmentation in a given zone of the bench.  This helps predict burden, collar spacing, subgrade drilling, explosive type and distribution, etc. 

3. Semi-static stress fiels at the face:  For a given bench blast procedure, this simulates the  intensity of the semi-static stress field by the time the latter reaches the face, for each column of explosive.  Knowledge of this, together with the shock wave stress contour, allows the maximum burden to be predicted. 

4. Optimum delay:  For a given bench blast procedure, the velocity of the rock at the face is simulated and the optimum delay is calculated using the well proven Dupont D. S. B. criterion; it also allows the delay to be calculated according to any other choice of criterion. 

5. Quality Factors:  For a given bench blast procedure, evaluation of the quality of the blast results at various key locations in the bench are simulated, together with average movement and fragmentation, as well as relative fly-rock distance; these results are conveniently summarized in tabular form together with blasting costs.  Use of this subroutine does not replace a full study with the displacement profiles, shock wave contours, intensity of the semi-static stress at the face, burden velocity, etc. but it complements such a full study, especially to summarize a study report. 

6. Explosive rating in a specific rock:  In the 1950’s, Cook and others developed subroutines to calculate the thermo-chemistry of a given explosive formulation; these can supply the chemical energy which the explosive can release, as well as the total work energy it can perform under optimum conditions, both per gm.  During a blast, the work actually performed is much less than that under optimum conditions; in particular, this work in part turns to shock wave energy, and in part to movement and fragmentation, the amount of each depending on the type of rock being blasted.  Simulations with Blaspa take the rock into account and predict these partitions for a given rock.  Such information is of particular importance to an explosive supplier when he offers his products to a specific user, or when he develops a new explosive for a given market.  Thus the ability to simulate Brisance (shock wave energy) and Wef (effective energy) has been included in the subroutines on the web, for the sake of suppliers.  It is also useful to a mine or quarry which is considering a change in the type of explosives it uses.