Blast Monitoring


How it works

BMT makes every ore blast more profitable.

BMT’s technology accurately measures blast movement to determine the actual location of the ore-body post blast.

This information enables blast engineers, production geologists and pit foremen to make better decisions on the ore-waste boundaries in order to minimise ore loss and dilution.

The process:

  1. Remotely locatable sensors (Blast Movement Monitor sensors or BMM sensors) are activated, programmed and installed in dedicated drill holes prior to blasting.
  2. Post-blast, an operator walks the muckpile with our hand-held detector to locate each BMM sensor and record the signal strength.
  3. This data is used by our dedicated software to calculate the depth and the precise 3-dimensional movement vector of each BMM sensor.
  4. Ore boundaries can then be quickly redefined to reflect the measured movement, allowing the production team to know the precise location of the ore and waste.

The result: Ore and waste can be separated more accurately, improving mine reconciliation and making every ore blast more profitable.


The benefits

BMT is about getting more from your resource.

The Blast Movement Monitoring System (BMM System) is the most accurate and profitable blast movement monitoring method available.

Reducing ore loss is pure profit.

You still mine the same amount of rock, send the same number of trucks to the plant, process the same amount of ore. The only difference is that with the BMM System, there is more mineral produced by the plant.

More revenue for an incremental cost.

By adding only a few cents per tonne to the cost of ore blasts, you can significantly reduce ore loss and dilution, improve reconciliations and potentially gain millions of dollars’ worth of extra mineral. Without BMM sensors, that value would be lost to the waste dump, never to be converted into revenue.

Accurately accounting for blast movement offers a genuine step change in mining efficiency. In the words of Placer Dome’s Vice President of Operations, “This seems to me one of those low-hanging fruits that are easy to collect.”

Blast movement and its effect on ore loss and dilution – and ultimately the economic consequences – are generally poorly understood within the mining industry, and can be difficult to accurately quantify. The BMM System enables a more accurate determination of ore/waste boundaries after blasting, and has the potential to significantly increase an operation’s profit. Case studies from thousands of blasts involving the BMM System indicate that hundreds of thousands of dollars per blast can be lost if the movement of ore/waste boundaries post blast is not measured accurately.

“The new technique allows us to recover ore from narrow zones that has been excluded from the reserves, which in our case in turn leads to an increase in net present value,”

Sandra Pfeiferberger, Geologist, Tallering Peak Mine, Western Australia

The BMM System

BMT provides our customers with a package of products and services, collectively known as the BMM System.

The BMM System is an integrated solution consisting of a number of individual components:

Blast Movement Monitor sensors

The Blast Movement Monitor sensors (BMM sensors) is a directional transmitter that is programmed and installed in dedicated blast holes, with the ability to transmit through 25m of rock. The BMM sensors move with the rock during the blast and have been designed to withstand the extreme conditions within a blast. There are four versions of BMM sensors that can be identified by the Detector, which allows up to four BMM sensors to be installed in a single hole, or close to each other in different holes. Each version is colour coded for easy identification.


To enable a long-shelf life, the BMM sensors leave our factory in a low-power state. The Activator is a remote control device that provides the signal to turn on a BMM sensor and program functions prior to installation in the blast.


The Detector receives and interprets the signal produced by the BMM sensors, allowing the user to quickly locate the peak signal that occurs directly above each BMM sensor. This point is surveyed and the signal is recorded by the Detector for later processing by BMM Assistant. The Detector is designed for ease of use in a production environment and has been used in temperatures ranging from -50°C to +50°C.

BMM Explorer

BMM Explorer is the world’s most advanced software for defining ore polygons after blasting. It is integral to the BMM System. BMM Explorer captures many years of revolutionary blast movement research, and is designed to do the hard work behind the scenes so our customers can concentrate on interpreting and applying the results. Even if you are currently translating ore polygons to account for blast movement, it is likely to be inaccurate without BMM Explorer.

In a few easy steps:

  • Blast design parameters are stored in the database.
  • 3-dimensional movement vectors are calculated, and summarised numerically and graphically.
  • Ore polygons are translated by unique, proprietary algorithms.
  • All this valuable information is archived in a central database for future analysis.

Support, Maintenance and Training

The BMM System packages include access to our expert consultants that provide technical support, maintenance, and upgrades of all hardware and software. Additionally, Value and Optimum packages include on-site training with our consultants.

Our flexible and mobile team can provide services to mines in all corners of the globe.

Survey Enabled Detector

Survey Enabled Detector (SED)

This is a brand new product that removes the need for the presence of a survey team on the muckpile, thereby, reducing cost and providing greater efficiency, safety and accuracy. The Survey Enabled Detector (SED) is fully integrated into the existing BMT solution and is easily attached and released via a quick release bracket. This will speed up the logging of the blast movement monitor thereby ensuring minimal disruption creating the post blast dig polygon and providing the quickest possible turnaround form blast to excavation.

Remote Data Transfer (RDT) Unit

This product allows for the data from the PDA to be transferred to BMM Explorer Software remotely, eliminating the need to transfer data via a USB. This data transfer can occur directly from the pit if Wi-Fi is available, or alternatively it will use the office Wi-Fi to connect and transfer data in seconds with the press of a single button. The seamless transfer of pre and post-blast data ensures maximum efficiency and minimal disruption. It also eliminates previous driver conflicts that could arise when using USBs.

Value Calculator

The Value Calculator is an ore loss and dilution module that provides a visual comparison of ore blocks in there in-situ position versus post blast ore locations. It is a software enhancement that provides a summary report in a PDF format and highlights Ore Loss, Dilution and Misclassification.This is a valuable tool for all sites as it is a visual representation of the value that is being created with every blast and can be emailed to Senior Management to reinforce the financial value that is being created for the mine.

“The BMM System should become a standard that every mine will use.”

Johan Labuschagne, Mine Manager – Open Pits, Goldfields St Ives Gold Mine