A double structural plane direct shear test method for studying the mechanism of sliding rockburst

A test method and structural surface technology, applied in the field of rock mechanics, can solve problems such as failure to reflect the conditions of rockburst occurrence, and achieve the effect of a reliable test method
CN106323768BActive Publication Date: 2018-10-23NORTHEASTERN UNIV LIAONING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEASTERN UNIV LIAONING
Publication Date
2018-10-23

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Abstract

The invention provides a dual-structure plane direct shear test method for studying the mechanism of slip-type rockburst, which includes the following steps: making a rock sample with a square cross-section; and sequentially generating a dual-parallel structure from the rock sample under Brazilian splitting conditions. surface; conduct 3D scanning of the double parallel structural surfaces respectively, obtain the three-dimensional digital model of the double parallel structural surfaces and calculate their roughness; place the rock sample on the shear testing machine, and install the acoustic emission monitoring probe on the bottom side, and test The sample was subjected to a direct shear test under normal normal stress conditions, and the acoustic emission signal of the rock specimen was monitored at the same time; the shear time, shear stress, shear displacement, and acoustic emission signal data during the shear test were summarized and sorted. On this basis, The mechanism of slip-type rockburst in this rock sample is analyzed. The present invention constructs a simplified rock mass system in which structural surfaces and rocks interact and influence each other within the scope of the laboratory, and can provide a more reliable experimental method for mechanism research and early warning prediction of slip-type rock bursts.
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Description

technical field

[0001] The invention belongs to the technical field of rock mechanics, and in particular relates to a double structural plane direct shear test method for studying the mechanism of sliding rockburst. Background technique

[0002] Worldwide, with the continuous expansion of rock engineering such as mining, hydraulic power, transportation, nuclear waste disposal, and military defense, the in-situ stress is gradually increasing, and the problem of rockbursts has become increasingly prominent. Generally speaking, rockburst is a dynamic failure phenomenon of surrounding rock caused by excavation and unloading of underground engineering rock mass under high ground stress state of hard rock. The occurrence of rockburst disasters affects the progress of the project, increases the cost of the project, and even causes catastrophic consequences such as equipment damage and casualties.

[0003] Engineering practice shows that the shear slip of structural planes may indu...

Claims

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