Sunday, 17 June 2012

Windows 8 Release Preview

Images ISO

L'image ISO doit être convertie en média d’installation que vous stockerez sur un DVD ou un disque mémoire flash USB. Vous trouverez la procédure à suivre sur cette page. Des outils de développement sont disponibles en téléchargement sur le Centre de développementWindows
Important : Si vous décidez de revenir au système d’exploitation précédent, vous devrez le réinstaller à l’aide des médias de récupération ou d’installation fournis avec votre PC, en général un DVD. Si vous ne disposez pas d'un média de récupération, vous pouvez en créer un à partir de la partition de récupération du PC en utilisant le logiciel fourni par le fabricant du PC. Pour plus d'informations, consultez la section de support technique sur le site Web du fabricant. Après l'installation de Windows 8, il est impossible de réinstaller la version précédente deWindows à l’aide de la partition de récupération du PC. 

Vulcan 7.5










Monday, 11 June 2012



                                  insert downhole delays in blast holes - detonators, connectors, primers

Down Hole Delay mode toolbar
Edit Menu

  • Downhole delays are inserted into blast holes to detonate decks of explosives. A blast hole can contain more than one delay. At least one delay must be inserted in every group of explosive decks: if two or more adjoining decks are explosive materials, then only one delay located somewhere within the decks is required; however, if the explosive decks are separated by a non-explosive material, then a delay is required in each deck.
    The main features of this mode are:
    • insert detonators, connectors and primers
    • insert at distance from toe or collar
    • properties stored with design
    Connectors are used to join a downhole detonator to the surface delay at the collar. The burn rate of the connector is taken into account when calculating the actual detonation time of the delay during detonation simulation. A primer can be included with the downhole delay, but it has no effect on the performance of the blast hole.
    If the visibility option for downhole delays is turned on, the topmost delay is represented as a coloured triangle inside the blast hole.

       downhole delay parameters   Downhole Delay Parameters
    Downhole Delays dialog
    Selecting a Delay

    The Downhole Delays dialog is used to select a detonator, connector and primer and the position of the delay in the hole. Normally, items are selected from the JKBench series, but the display can be limited to a sub-set of created items. Click [Show Details] to display the properties of the selected item.
    Two options are available to insert the delay at a position in a hole. Enter a distance for either option. If a [from collar] is selected, the delay will be placed at that depth down the hole; if [from toe] is selected, the delay will be placed at that distance measured up from the bottom of the hole. The final length of the connector is calculated as the depth of the delay from the collar. A set of conditions apply to the calculation of the depth:
    1. if the distance is greater than the length of the hole, the depth will be equal to the hole length
    2. if the distance is greater than the fixed length of the connector, the depth will be the length of the connector
    3. if [from toe] is selected and the holes are different lengths, then the depth of the delays will also vary in each hole

       insert in a single hole   Insert Delay in a Single Hole
    To insert the selected detonator, connector and primer in a single hole, place the cursor near the hole and click.

       insert in all holes   Insert Delay in All Holes
    To insert the selected detonator, connector and primer in all holes, place the cursor anywhere in the design area and click.

       insert in marked holes   Insert Delay in Marked Holes Only
    To insert the selected detonator, connector and primer in marked holes, ensure that the holes are marked, then place the cursor anywhere in the design area and click.

       insert in unmarked holes   Insert Delay in Unmarked Holes Only
    To insert the selected detonator, connector and primer in unmarked holes, ensure that the holes are unmarked, then place the cursor anywhere in the design area and click.

       query   Query - display information about a deck
    Displays details of the data for the first delay in the nearest hole to the cursor. The hole is highlighted. To display the next delay in the same hole, click with the cursor on the hole, or click in the hole diagram. To select a different hole, move the cursor. For more information, go to Design Area: Query.

       Edit menu: Delete Downhole Delays in All / Marked / Unmarked Holes
    Delete all downhole delays from the design.
    To delete a single delay, place the cursor near the hole and press [Backspace]. The topmost delay in the hole (closest to the collar) is removed. Repeat to remove the next delay in the same hole


    JKBench is a program for the design and basic analysis of blasts in open cut mines. It allows the user to layout a blast design consisting of blast holes, decks, downhole and surface delays and connections, and then to run a detonation simulation. The design can be further described by strings and polygons. Basic analyses of 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 a Microsoft Access database. Added to this are object details (such as hole dip, bearing, diameter, length, burden, spacing), properties of explosives, detonators, primers and connectors, plus timing information.

    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
    (Line/Polygon Creation)
    • draw and edit strings and polygons
    • set text labels on the design
    • import strings and polygons
    • cut/copy/paste strings and text labels

    Area Mode

    Drill mode
    (Hole Creation)
    • hole properties and pattern parameters
    • drill single holes and patterns
      (square, staggered)
    • import holes from text file
    • cut/copy/paste holes and attached data

    Drill Mode

    Load mode
    (Material Loading)
    • load multiple decks of materials
    • load by length, mass, depth from collar or percentage of hole length
    • explosives and non-explosives
      (stemming, air-deck, water, etc)
    • properties stored with design

    Load Decks

    Down Hole Delays mode
    (Downhole Delay Sequencing)
    • insert detonators, primers and connectors
    • insert at distance from toe or collar
    • properties stored with design

    Down Hole Delays

    Surface Delays mode
    (Surface Delay Sequencing)
    • define detonators and connectors
    • connect any two holes or a line of holes
    • inter-hole, inter-row, uni- and bi-directional
    • properties stored with design

    Detonate mode
    (Detonation Simulation)
    • simulate the detonation sequence on screen
    • continuous and step display
    • show separation of initiation and detonation fronts
    • display detonation times for all components
    • all timing results saved in design database

    Analysis tools
    • contour of first detonation times for holes
    • chart of maximum instantaneous charge with calculation of PPV and airblast
    • calculate powder and energy factors based on defined volume or design parameters
    • 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

    General tools
    • cut, copy and paste data internally or externally
    • import strings and hole layouts from text files
    • zoom in/out or set scale of design area
    • query details on holes, decks, delays, strings, etc
    • print design to scale
    • save screen appearance and design parameters
    • select display of metric or imperial units
    • data saved in Microsoft Access databases is available to other applications

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