Blasting dynamic load application method for shear test of large-scale rock mass anchorage structural surface

Abstract

A method for applying a blasting dynamic load for a shear test of a large-scale rock mass anchorage structural surface. First, according to the blasting mining conditions of an open-pit mine or the blasting pressure relief condition of an underground coal mine, the large-scale rock mass anchorage structural surface shear test is determined after statistical analysis. According to the test requirements, design the explosive amount and position arrangement of the internal embedded detonator of the sample under the shear test, and use the cuboid steel mold to cast the large-scale rock mass structural surface concrete sample; secondly, generate the detonation control electrical signal of the detonator through the data processing computer , and transmitted to the optical fiber switch to generate the control optical signal; again, the optical signal undergoes photoelectric conversion to generate the control electrical signal; finally, the control electrical signal is transmitted to the electrical signal distribution controller through the allowable cable, and the electrical signal is amplified by the sub-computing controller The explosion range and sequence of the detonator are controlled by the lead wire of the detonator, so as to generate a dynamic blasting load that meets the test requirements. The invention can avoid the limitation of the blasting dynamic load applied by the oil cylinder and the unsafe problem of the blasting of the detonator.

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...

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