The displacement of the rock mass during the explosion is inherently non-uniform. Even within a single unit block, the absolute value of the offset tends to vary widely and deviate by more than +/- 50% from the average. In addition, the direction of displacement can vary greatly. It is obvious that ensuring an effective solution to the problems of ore control is inextricably linked with the accuracy of determining the contours of the excavation after the explosion. The impossibility of aggregate accounting for a wide range of mining and geological factors with current modeling tools leads to the fact that today there is no alternative to direct measurement method for evaluating ore displacement by explosion. It is not possible to obtain complete data, for example, on the compressive or fracture strength of the ore / host rocks, Young's modulus, Poisson's ratio for each point of the massif. When modeling, this information is entered on the basis of statistical distributions over the available fragmentary observations, which leads to the fact that the error of the modeling results based on historical data is such that it is inappropriate to ensure an effective solution of ore control problems using them.
The BMM system was introduced to the market after a team of scientists at the University of Queensland determined that it was not possible to simulate displacement with the accuracy required to control grades. BMT believes that the best way to protect your plant inventory value is to measure the displacement in the mined block using the BMM system - either as a standalone application or in combination with a sophisticated mine / mine contour optimizer.