Glossary
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A hole which is not considered to be 'fired' with the blast, despite still being associated with the blast. See: Menus and Tools > Context Sensitive Ribbons > Hole > Abandon holes.
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The latest real-world data associated with the hole.
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An unplanned hole that was not part of the original drill and blast design
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The result of compression waves from material travelling through air due to blasting of a mine site. It is usually measured in either decibels, psi or Pascals.
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An advanced tool to model the movement of material through the air as a result of blasting of a mine site. The information is gathered within a specified distance from the blast and visualised. Exact air blast measurements can also be estimated at a single point given its x, y, x coordinates.
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The state of a hole immediately after it has been drilled.
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A file that can be linked to related patterns and blasts. A surface can be published as an attachment.
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The material added to a hole so that the difference between the actual drill depth and the target drill depth is within the set process tolerance.
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The difference between the dip depth after backfill and the target charge depth.
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The process of shortening the length of a hole so that the difference between the actual depth and the target charge depth is within the set process tolerance.
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The angle of the horizontal direction of the hole's toe from its collar, measured clockwise from North towards East. North = 0 or 360 degrees, East = 90 degrees, South = 180 degrees, West = 270 degrees
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A collection of holes with a unique name.
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The distance between holes in a row.
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The amount of time delay per metre of burden across the blast. It is calculated from a loaded tie-up design. The purpose of determining a burden relief surface is to model the displacement of material of fired holes row by row. The idea is that there is sufficient time delay between separate rows. This ensures that there is enough area for the displacement of material once holes have been fired.
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Explosive that is placed in a hole.
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The bottom of the lowest reconciled or loaded explosive deck.
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The distance from the collar of a hole to the bottom of the lowest explosive deck in a hole.
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The difference between the planned charge depth and the actual charge depth.
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The total length of explosive decks within the hole. This will almost always be less than the charge depth as the hole will typically have some non-explosive decks (i.e. drill cuttings or stemming). Charge length differs from column length.
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A length in metres used to determine whether a hole is charged correctly.
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A set of conditions which dictate how a hole should be filled. When a charge rule is applied to a hole, it has a charge plan.
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The vertical distance of the charge above the top of the ore body. A negative value indicates a vertical distance below the top of the ore body.
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The ring of drill cuttings that surround the opening of a hole at the surface.
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The difference between the target collar and the as-drilled collar or surveyed collar is available. The error is measured in X/Y only.
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The maximum tolerated difference between the target collar and the as-drilled collar (X and Y values only). This value is set in the Home > Setup > Site > Process tolerances tab.
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The difference between the target collar Z value and the as-drilled collar Z value.
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The maximum tolerated difference between the target collar Z value and the as-drilled collar Z value. This value is set in the Home > Setup > Site > Process tolerances tab.
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The continuous length of any number of explosive products.
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An interval of a hole uniformly filled with a particular blast product. A charged hole usually has a mixture of both explosive and inert decks.
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The distance along the hole from the top of the hole (its collar) to the bottom of the deck.
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The distance between the top and the bottom of the deck.
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The ideal specification for a blast, hole, charge, etc. as designed by a drill and blast engineer before any real-world data is provided.
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The measured distance from the collar to the toe of the hole during the dipping process.
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The maximum expected difference between the true depth of the hole and the dip depth measured using a tape measure. BlastLogic will allow holes to get longer by this amount (whereas normally a hole would not get longer, only shorter) by considering the difference within measurement precision.
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A hole that has had its depth measured after it has been drilled is said to have been dipped.
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The process of assessing the conditions of a hole after it has been drilled. Measurements include depth, water and wet sides, and temperature. Dipping is usually performed by a crew using a tape-measured with a weight on one end.
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A computer system on-board a drill machine used to guide the drill operator in the drilling process. The drill navigation system also typically records the drill date, as-drilled collar, as-drilled angle, as-drilled bearing, and as-drilled drill depth for each hole using onboard sensors such as GPS.
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The gradual shortening of a hole as material naturally falls back in.
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The change in depth of a hole due to the process of fallback.
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After a blast pattern has been detonated the holes in that pattern are said to have been fired.
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A visual display of the direction of first movement of material based on the hole firing times gathered from the tie-up design.
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An advanced tool used to model rock fragmentation size once a blast has been fired. To obtain results, the user is provided with geotechnical parameters, charge plans and initiation timings from the selected tie-up plan.
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The process of accounting for actual blast accessories and explosives used in the field versus design and depleting inventory stocks accordingly.
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The current status of the hole based on the latest data available. Can include design data if no real-word data is available.
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The state of a hole once charging data has been entered via the tablet.
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A device that logs the sequence of detonators as they are connected to the harness wire.
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The length between the collar and the bottom of the lowest explosive deck in a hole.
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An on-site location for storing product.
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The maximum charge initiated at any instant. Usually calculated within a timing window, which is typically set at 8ms.
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Overdrilling is the process of drilling a hole longer than desired to allow for fallback between the time of drilling and charging the hole. The difference between the design drill depth and the design charge depth is called the overdrill.
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The pressure caused by a shock wave over and above normal atmospheric pressure (as a result of firing a blast).
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The instantaneous sum of the velocity vectors (measured in mm/s or inches/s) of the ground movement caused by blasting.
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The ratio of explosive mass per unit volume of rock to be blasted, typically measured in kilograms per cubic metre. There are two methods of calculating powder factor, either by design volume or hole length. Design volume is: (designed drill length + charge standoff)*(cos(design angle))*burden*spacing. Hole length method volume: (last known hole depth or charge length + charge standoff)*cos(as-drilled angle)*burden*spacing.
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Reports the number of primers in each deck (reconciled data). The number of primers in inert decks will appear in parenthesis (if present). Decks are separated by a hyphen and are ordered from top to bottom.
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The speed at which a seismic wave travels away from the blast, measured in feet/s or m/s.
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A layer of rock left on top of a coal seam or ore body after blasting to protect the ore body from the blast.
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The maximum allowed vertical distance between the hole's toe at the actual charge depth and the actual protective cap surface.
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When a blast, attachment, tie-up, surface, or charge rule is published, it is stored on the server.
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The state of a hole once charging data entered on the tablet has been validated in the desktop application.
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A hole that is drilled as a replacement for a previously drilled hole which has since been abandoned.
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The setup of a hole is the combination of the angle and bearing of that hole.
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The measurement of the error resulting from angle and bearing. The error is measured by placing the design and as-drilled hole in the same XYZ position (which removes the influence of XY and Z error), and using the user-defined depth (setup error vertical depth that is set in Home ribbon > Setup group > Site > Process tolerances tab). This allows the measurement of the horizontal distance between the design and as-drilled holes. The obtained distance value is solely based on the angle and bearing change, which can be then used as an error value and compared to the defined tolerance values.
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The maximum tolerated setup error for a hole to be still considered drilled within the specification values.
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A continuous time period. Often personnel and crew are allocated to particular shifts within a cycle i.e. day/afternoon/night shift.
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The distance of a hole toe above a reference surface (e.g. coal seam) measured vertically.
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Any non-explosive bulk product used.
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The difference between the loaded and planned stemming heights.
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The maximum tolerated difference between the loaded and planned stemming heights.
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The distance of a hole toe below a reference surface (e.g. ore body) measured vertically.
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The target collar location for the drill operator to drill the hole. This is calculated by projecting the design collar along the design bearing and design angle to the same Z value as the As-drilled collar. This location is compared against the As-drilled collar when calculating the collar error rather than the design collar, as it takes into account differences between the design and actual bench RL.
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The target drill depth is the drill depth the drill operator should drill the hole to based on the actual collar, dip, and bearing. It is calculated as the drill depth required to achieve an as-drilled toe at the same RL as the design drill toe. It adjusts the design drill depth to take into account the differences in RL of between the as-drilled collar and design collar and differences in angle between the as-drilled angle and design angle.
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A plan showing detonation times for each hole. Tie-ups can be published as either a design or an actual tie-up. A design tie-up uses design and charge plan values. An actual tie-up uses the latest real-world data.
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A non-editable tie-up which has been stored on the server. Two tie-ups can be published per blast - an actual and a design tie-up.
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A display of surface initiation timing curves for the selected tie-up.
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A display of detonation information within a timing window (which is usually set to 8ms) for the selected tie-up.
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A way to assign timings to a section of a hole, known as an interval.
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The window of time which is treated as 'instantaneous' when calculating vibration or overpressure.
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The bottom of the hole.
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Describes data that is stored in the user's local cache and has not been published to the server yet.
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Vibration is the result of seismic waves from blasting which travel rapidly through the ground. The level of vibration is measured by the Peak Particle Velocity (in mm/s or inches/second).
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An advanced tool to model vibration within a specified distance from the blast. Exact vibration measurements can also be estimated at a single point given its x, y, z coordinates.
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The length between the bottom of the hole and the top of the water level.
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The length between the bottom of the hole and the top of the water level plus the distance above it where the sides of the hole are wet.
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