Blasting dynamic load applying method for large-size rock mass anchoring structure surface shear test

Abstract

The invention discloses a blasting dynamic load applying method for a large-size rock mass anchoring structure surface shear test. The method includes steps of firstly, determining the test requirements of the large-size rock mass anchoring structure surface shear test after statistical analysis according to the blasting mining working condition of a surface mine or the blasting pressure relief working condition of an underground coal mine, designing the explosive quantity and position arrangement of pre-buried detonators of a sample under the shear test, and pouring a large-size rock mass structure surface concrete sample by adopting a cuboid steel mold; secondly, generating a detonator detonation control electric signal through a data processing computer and transmitting the electric signal to an optical fiber switch to generate a control optical signal; thirdly, performing photoelectric conversion of the optical signal to generate a control electric signal; and lastly, transmittingthe control electric signal to an electric signal dispersion controller through an allowable cable, and amplifying the electric signal by a division controller and then controlling the detonator blasting range and sequence through detonator leads, and generating a blasting dynamic load meeting test requirements. The method is advantaged in that the limitation of applying a blasting dynamic load byan oil cylinder and an unsafe problem of detonator blasting can be avoided.

Description

technical field [0001] The invention relates to a blasting dynamic load application method for a large-scale rock mass anchorage structural surface shear test, and belongs to the technical field of indoor physical and mechanical tests. Background technique [0002] In the construction process of large-scale construction projects such as large-scale hydropower projects, high-speed railways, deep resource mining, strategic oil reserves, and nuclear power projects, due to the existence of rock mass structural planes, the stability and catastrophe of rock mass in engineering areas are quite prominent. Especially in the process of large-scale open-pit mining or underground coal mine pressure relief, the blasting method is often used, which is more likely to cause the instability of the rock mass structural plane, which will seriously affect production, and cause casualties and heavy losses of equipment and mineral resources. . To solve this problem, anchoring technology is an im...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a method for applying blasting dynamic load in shear test of large-scale rock mass anchorage structural surface, which can avoid the limitation of blasting dynamic load applied by oil cylinder and the unsafe problem of detonator blasting. It can ensure the safety of the experimenters and reduce the attenuation of the signal, which improves the accuracy and scientificity of the test results. The permissible cables can increase its scope of application and provide a scientific basis for the design of shear tests for large-scale rock mass anchorage structural surfaces.

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