Method for determining blasting action area of cylindrical charge in rock

Abstract

The invention discloses a method for determining a blasting action area of a cylindrical charge in rocks. The method comprises the following steps: according to the characteristic data of the following rocks and explosives before and after the cylindrical charge is exploded in rocks, namely the radius of a blast hole, the compressive strength of the rocks, the tensile strength of the rocks, the density of the rocks, the density of the explosives, the detonation velocity of the explosives, the longitudinal wave velocity and the Poisson's ratio of the rocks, bringing the above characteristic data into the formula I-1, formula I-2, formula I-3, calculating to obtain the blasting action area of the cylindrical charge in rocks, namely the radius of an enlarged cavity, the radius of a crushing area and the radius of a rupture area, which are respectively marked as r1, r2 and r3. According to the method, the enlarged cavity, the crushing area and the rupture area with rock mass destruction characteristics can be obtained through a model of a single column-shaped charge acting area in rocks. The compound structure is shown in the description.

Description

technical field [0001] The invention relates to a method for measuring the blasting action area of ​​a columnar charge inside a rock, and belongs to the field of safety science and technology or the field of impact dynamics. Background technique [0002] At present, the widely used charge form in geotechnical engineering blasting is columnar charge, but most scholars explain the calculation of stress parameters of columnar charge with spherical charge theory through detonation theory analysis, and do not use columnar charge to calculate stress parameters. Analyze and calculate its own characteristics. When the explosive pack explodes in the infinite rock medium, the strength of the shock wave it arouses in the rock mass decays rapidly with the increase of the propagation distance, so its effect on the rock mass also changes accordingly. If the rock mass after blasting is cut open, the internal action of the charge can be roughly divided into the following categories accordi...

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Problems solved by technology

[0002] At present, the widely used charge form in geotechnical engineering blasting is columnar charge, but most scholars explain the calculation of stress parameters of columnar charge with spherical charge theory through detonation theory analysis, and do not use columnar charge to calculate stress parameters. Analysis and calculation of its own characteristics

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