High-efficiency bench blasting method for interbedded rock mass

Abstract

The invention discloses a high-efficiency bench blasting method for interbedded rock mass and relates to the technical field of rock-mass blasting. The high-efficiency bench blasting method comprises the following steps of: step (1), primarily analyzing the geological structure of a blasting area; step (2), understanding detailed space information and interbedded structure of a blasting area; step (3), testing rock-mechanics properties of a main stratum of the blasting area, simplifying interbedded space information, establishing a blasting numerical model and analyzing an energy leaking area; and step (4) optimizing a blast-hole charging structure according to a simulation result, and adopting a sectional difference density charging method for charging. The high-efficiency bench blasting method disclosed by the invention has the beneficial effects that the main energy leakage area is explored by adopting a numerical analysis as a means, and the sectional difference density charging method is adopted, so that the problems of high boulder yield, more bedrocks and large explosive consumption in full-hole charging or common sectional charging are effectively reduced; and simultaneously, the high-efficiency bench blasting method is also conductive to reducing the operation time of field blasting, and has the advantages of simple process, low cost, good site operability and strong adaptability.

Description

technical field [0001] The invention relates to the technical field of rock mass blasting, in particular to a high-efficiency step blasting method for interbedded rock mass. Background technique [0002] In the process of open-pit mining, blasting is a common method to strip the overlying rock strata of the ore body, but due to the huge difference in the formation process of the geological structure, the rock stratum often presents a complex interbedded state of soft and hard layers, such as mudstone and Sandstone layered rock mass occurs repeatedly. Under such conditions, field operations often fail to analyze the spatial distribution of interlayers. The use of a full-hole charge structure makes it difficult for the explosives in the blast hole to achieve an optimal match with the interlayered rock mass, resulting in Problems such as uneven distribution of blasting energy and leakage have been eliminated, and the rock mass cannot be broken as expected, and problems such as ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of high block rate during blasting of interbedded rock mass in open-pit mines, the present invention provides a method to reduce the hazards of large blocks, root bottom, side pull, back pull, and flying stones during blasting of interbedded rock mass, and at the same time improve the blasting quality. efficient interlayer step blasting method

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