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Experiment method for simulating impact type rock burst

An experimental method, rockburst technology, applied in the field of rock mass mechanics and geotechnical engineering research in deep mine engineering, can solve problems such as short research time, no experimental method, and shallow understanding of rockburst occurrence rules, so as to ensure smooth progress , The effect of maintaining construction safety

Active Publication Date: 2012-08-15
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current laboratory simulation experiment methods on rockburst are carried out under the action of static load, and there are no experimental methods under the action of disturbance factors such as excavation or blasting.
Due to the unique mechanical characteristics of deep rock mass and the fact that human beings have not studied the law of entering deep rock mass for a short time, the understanding of the law of rockburst occurrence under the action of disturbance factors is still shallow

Method used

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  • Experiment method for simulating impact type rock burst
  • Experiment method for simulating impact type rock burst
  • Experiment method for simulating impact type rock burst

Examples

Experimental program
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Effect test

no. 1 example

[0039] Such as figure 1 As shown, the first embodiment of the experimental method of the simulated impact type rockburst of the present invention comprises the following steps:

[0040] S1, making the rock sample test piece 60, the rock sample test piece 60 center has a circular through hole 61 in section (see Figure 2A) or a circular half hole 62 (see Figure 2B ) or a horseshoe-shaped through hole 63 (see Figure 2C ) or a horseshoe-shaped half hole 64 (see Figure 2D ). The holes in the rock sample 60 are mainly through holes and half holes, but the cross-sectional shapes of the holes can be various, not limited to circular or horseshoe. The rock sample can be made in the laboratory, or it can be taken from the rock mass at the proposed excavation site. Using the rock mass at the proposed excavation site can not only study the mechanism of rockburst, but also be used for the actual site. Excavation and blasting play a guiding role.

[0041] S2. Load the three-dimensi...

experiment example 1

[0052] see image 3 , Figure 4A to Figure 4F . Using the experimental method of simulating impact rockburst in the first embodiment above, the rock sample specimen is a sandstone rock mass collected at the proposed excavation site, which is a cube of 110×110×110mm, which has a circular shape with a diameter of 50mm. through the hole. The uniaxial strength of the rock sample specimen is 68MPa. In step S2, the three-way initial static load stress loaded on the rock sample specimen is respectively: X-direction static stress FX: 30kN, Y-direction static stress FY: 290kN, Z Static stress FZ: 50kN, when the force loading method is adopted, the loading rate is 0.5kN / s, the type of disturbance load in step S3 is square wave (amplitude 0.1mm, frequency 0.05HZ), only in the Y direction disturbance, disturbance After the load is applied for 3 minutes, there is no peeling phenomenon in the hole through which the rock sample penetrates, and the disturbance is stopped; the static stress...

Embodiment 2

[0058] Such as Figure 6 As shown, the steps of the second embodiment of the experimental method of simulating impact rockburst of the present invention are basically the same as the steps of the first embodiment, the only difference is that in steps S4 and S5 of the first embodiment, when the rock sample When no rock burst occurs in the specimen, after increasing the three-way static stress value loaded on the rock specimen specimen, repeat the remaining experimental steps (i.e. repeat steps S2 and the following experimental steps); and in the steps of the second embodiment In S4 and S5, when the rock burst does not occur in the rock sample, after increasing the disturbance load loaded on the rock sample, repeat the remaining experimental steps (that is, repeat the experimental steps of step S3 and below), and finally succeed cause rockbursts. Other parts of the second embodiment that are the same as those of the first embodiment will not be repeated here.

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Abstract

The invention provides an experiment method for simulating impact type rock burst. The method comprises the following steps of: making a rock sample test piece with a through hole or half hole; loading three-way initial static load stress to the rock sample test piece; loading disturbance load to the rock sample test piece for 0.5-10 minutes, and observing whether the inner surface of the through hole or half hole of the rock sample test piece peels off; observing whether the inner surface of the hole peels off; if the inner surface peels off and is further damaged, observing and recording the damage process; if the inner surface does not peel off, increasing the static load stress value loaded to the rock sample test piece, or increasing the disturbance load strength and repeating the experiment process until the rock sample test piece enters the damage process; and observing and recording the damage process to finish the experiment of impact rock burst. In the invention, under the effect of the disturbance load, the rock burst phenomenon of the rock sample test piece is successfully induced, and a foundation is laid for gradually understanding and mastering the essence of the practical rock burst phenomenon by researching the mechanism of the rock burst phenomenon of the rock sample test piece.

Description

technical field [0001] The invention relates to the field of deep mine engineering rock mass mechanics and geotechnical engineering research, in particular to an experimental method for simulating impact rockburst. Background technique [0002] With the development of geotechnical engineering such as mines, water conservancy and hydropower, and railway (highway) traffic tunnels, rockburst, as a very dangerous disaster phenomenon in deep mines, occurs more and more frequently. Rockbursts are sudden and violent, and the rock fragments ejected during the destruction carry a large amount of energy, which will pose a threat to equipment and personnel, and even endanger life in severe cases. [0003] As we all know, blasting is an indispensable construction method for large-scale water conservancy, tunnel, mining engineering, and nuclear power engineering rock mass excavation. When the explosive explodes in the rock mass, it releases a large amount of explosive energy instantaneo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/313
Inventor 何满潮杨晓杰孙晓明
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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