JKSimBlast Design: 2DRing

Overview

2DRing is the underground ring blast design and analysis module of JKSimBlast. It allows the user to create multiple planar ring designs consisting of blast holes, decks, downhole and surface delays and connections, and then to run specific analyses such as detonation simulations and energy distributions. The design can be further described by strings and polygons defining orebody outlines, drilling boundaries and underground openings (drives, etc.). Basic analyses for volume, tonnage, powder factor, component and total costs can be calculated for the design.

Although the design is created in 2D plan, all data is stored with full 3D coordinates (east, north, level) in Microsoft Access databases. Added to this are component details (hole parameters of dip, bearing, diameter, length, burden, spacing), properties of explosives, detonators, primers and connectors, and detonation timing information.

The data generated by 2DRing can also be analysed in TimeHEx (blast timing vs holes and explosives) and analysed in 2DView (section and oblique views) for explosive energy distribution contours of explosive mass and energy, and contouring of hole-related data.

Program Features:

A blast design is divided into five component options, created in the various modes in the program. Each mode has specific tools and functions, with several global editing tools and reporting, query, input and output functions.

Area mode and Drilling Positions
(Line/Polygon Creation)

draw and edit strings and polygons
set string and text labels on the design
import strings and polygons
cut/copy/paste strings and labels
definition of planes (drives) at any orientation, drilling drives and drill rig positions
auto creation of drive outlines from pre-defined shapes or convert from imported or created strings

Hole mode
(Hole Creation)

hole properties and hole types
drill single holes or automatic drill by angle or to boundaries
convert lines to holes
edit hole properties
cut/copy/paste holes and attached data

Load mode
(Material Loading)

load single holes
automatic loading of fans
load multiple decks of materials
load by length, mass, depth from collar or percentage of hole length
user-definable materials stored in Stocks database
modify material properties at any time
deck properties stored with design

Down Hole Delays mode
(Downhole Delay Sequencing)

insert detonators, primers and connectors
insert at distance from toe or collar
define scatter (standard deviation) for timing analysis
user-definable items stored in Stocks database
modify properties at any time
properties stored with design

Surface Delays mode
(Surface Delay Sequencing)

define detonators and connectors
define scatter (standard deviation) for timing analysis
connect any two holes or a line of holes
inter-ring connections
user-definable items stored in Stocks database
modify properties at any time
properties stored with design

Analysis tools

detonation simulation
display chart of maximum instantaneous charge with calculation of PPV and airblast
calculate 3D and 4D energy distributions
creation of a face pattern from an image file (Image digitiser)
model near field PPV attenuation using the Holmberg-Persson approach
calculate totals for design components: count, quantity, mass, cost
copy design data to external application (e.g. spreadsheet)
copy results to external application or save to file

JKSimBlast Overview

Modules
2DBench - 2DRing - 2DFace
Blast Management System
Design Importer - TimeHEx - 2DView


Area mode and Drilling Positions (Line/Polygon Creation) draw and edit strings and polygons set string and text labels on the design import strings and polygons cut/copy/paste strings and labels definition of planes (drives) at any orientation, drilling drives and drill rig positions auto creation of drive outlines from pre-defined shapes or convert from imported or created strings

Hole mode (Hole Creation) hole properties and hole types drill single holes or automatic drill by angle or to boundaries convert lines to holes edit hole properties cut/copy/paste holes and attached data

Load mode (Material Loading) load single holes automatic loading of fans load multiple decks of materials load by length, mass, depth from collar or percentage of hole length user-definable materials stored in Stocks database modify material properties at any time deck properties stored with design

Down Hole Delays mode (Downhole Delay Sequencing) insert detonators, primers and connectors insert at distance from toe or collar define scatter (standard deviation) for timing analysis user-definable items stored in Stocks database modify properties at any time properties stored with design

Surface Delays mode (Surface Delay Sequencing) define detonators and connectors define scatter (standard deviation) for timing analysis connect any two holes or a line of holes inter-ring connections user-definable items stored in Stocks database modify properties at any time properties stored with design

Analysis tools detonation simulation display chart of maximum instantaneous charge with calculation of PPV and airblast calculate 3D and 4D energy distributions creation of a face pattern from an image file (Image digitiser) model near field PPV attenuation using the Holmberg-Persson approach calculate totals for design components: count, quantity, mass, cost copy design data to external application (e.g. spreadsheet) copy results to external application or save to file