Research And Application Of Intelligent Dynamic Design For Surface Mine Safety And Efficient Blasting

The deep hole blasting of open-pit bench is the most widely used blastingtechnology in the surface mine, and the blasting effects have great influences on thefurther production processes. In this paper, a combination of theories, i.e. blastingengineering theory, the principle of geological statistics, and the methods, i.e.numerical modeling, field test, are used to create a series of perfect intelligentoptimization program for safe and efficient blasting of surface mine.Collecting and sorting fundamental date of topography and geology in surfacemine, the geological information database for surface mine is founded in this paper.Contour-line interpolation method, inverse distance square weighting interpolationmethod, etc, are used to figure out the elevation information of any sites at the mine,the strata information and geological age information of any fracture surfaces at themine, the geological and topographical information of the blasting areas and aroundthe blast holes, and to dynamically renew the topographical information of each bench.The firmness coefficients of rocks tensile strength, density, wave impedance,intactness index of rock mass are chosen as the classification index for rockexplosiveness. Game theory is adopted to decide index weights calculated by analytichierarchy process (AHP) and entropy value methods. Fuzzy pattern recognitionapproach is employed to build the classification models of explosiveness of rock mass.The proper exposition types should be selected and explosive energy should beutilized efficiently in accordance with principles of matching rock mass with waveimpedance of explosive. In this paper, the explosive specific charge conceptions,“point”“line”“plane”, are put forward. With specific consumption of “plane” asguidance, the whole mining areas are designed with basic unit of “line”, and thespecific consumption of “point” in some areas are adjusted. The intelligentoptimization model of the first-row burden is created in order to dynamically adjustthe distance from first-row burden to bench slope. The blast-hole parameters manifestwhether blasting area in the horizontal direction is balanced or not. In reverse,explosive specific charge can be used to calculate the blast-hole parameters. Thecharging structure reflects whether the blasting area is balance in vertical space, andthe filling length should be no less than the minimum burden distance from the top ofblast hole to the dome, according to the Livingston blasting crater theory. The isochrones distribution is put forward to measure the rationality of time delay networkof blasting attachment, and to set up the system of inspection for network safety ofdetonation and intelligent optimization. The non-linear relationship between thedesign parameter and effects of blasting are analyzed to establish a prediction modelof blasting effects. Fuzzy evaluation theory is applied to grade the blasting effects andto build a prediction model of blasting evaluation. The difference between ideal valueand predicted value of blasting effects is figured out to optimize and adjust the designparameter. At the same time, the difference between the true value and predicted valueof blasting effects is also calculated to optimize and adjust the prediction model. Thesuccessful application of this system in the surface mine has increased the efficiencyof blasting design, improved the blasting effects and saved the blasting costs, which isbeneficial to improve blasting technology to be safer and more efficient and themanagement ability of digitization and intellectualization of the blasting technology.