Deep hard rock tunnel rockburst risk consequence equivalent grading method

A grading method and equivalent technology, applied in the field of rockburst risk, can solve problems such as inconsistent measurement methods, casualties, direct economic losses, social impacts, environmental impacts, and different grading standards for construction delays, and achieve the goal of overcoming poor accuracy. Effect

Inactive Publication Date: 2021-10-19
CHINA ACAD OF TRANSPORTATION SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] Due to the uncertainty of the consequences of rockburst risks, multiple consequences may occur at the same time, and the five consequences of casualties, direct economic losses, social impacts, environmental impacts, and construction delays have different classification standards, and the measurement methods are not uniform.

Method used

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  • Deep hard rock tunnel rockburst risk consequence equivalent grading method
  • Deep hard rock tunnel rockburst risk consequence equivalent grading method
  • Deep hard rock tunnel rockburst risk consequence equivalent grading method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1: A method for grading equivalent grading of rockburst risk consequences in deep-buried hard rock tunnels, the specific steps are as follows:

[0062] (1) Establishment of rockburst risk consequence equivalent calculation model

[0063] DC=C R +C Z +C S +C H +C G

[0064] In the formula, DC is the equivalent of rockburst risk consequences; C R Casualty equivalent; C Z is the direct economic loss equivalent; C S is the social impact equivalent; C H is the environmental impact equivalent; C G is the equivalent of construction delay;

[0065] Casualty Equivalent C R The calculation method is

[0066] According to the "Classification of Casualty Accidents for Enterprise Employees", the degree of injury is divided by the value of lost working days, among which, minor injury refers to the disabling injury with less than 105 lost working days, serious injury refers to the disabling injury with not less than 105 lost working days, and serious injury The...

Embodiment 2

[0088] Embodiment 2: Calculate the risk consequence equivalent classification of specific engineering cases with the equivalent classification method of rockburst risk consequences of deep-buried hard rock tunnels in Embodiment 1;

[0089] The Jinping II Hydropower Station is located in Sichuan Province, China. It is a super-large underground hydropower project with an ultra-deep buried long tunnel. The strata it traverses are all Triassic strata, respectively T 1 , T 2y , T 2b , T 2z , T 3 , the rock mass along the line is mainly composed of marble, limestone, sandstone and slate, and its geological section is shown in figure 2 , a total of four diversion tunnels, the average length of the tunnel line is about 16.67km, and the excavation diameter is 13m. Among them, the TBM excavation sections of the 1# and 3# diversion tunnels are circular sections with an excavation diameter of 12.4m, the excavation sections of the 1# and 3# diversion tunnels by drilling and blasting m...

Embodiment 3

[0093] Example 3: Based on the equivalent classification method for rockburst risk consequences of deep-buried hard rock tunnels in Example 1, three rockburst accident cases were selected from the water diversion tunnel of Jiulongxia Power Station, the Dulongjiang Highway Tunnel, and the NJ Hydropower Station in Pakistan to further verify the equivalent classification method Applicability, the actual consequences of specific rockburst accidents and the equivalent prediction results are shown in Table 12 below;

[0094] Table 12 Comparison of the risk equivalent prediction results and actual results of three rockburst accidents

[0095]

[0096] It can be seen from Table 12 that the equivalent prediction results of rockburst consequences in the three cases are ordinary, major and extra large, except that the rockburst prediction consequences of Dulongjiang Highway Tunnel K3+856.5~K3+854.5 are slightly lower than those calculated by the International Tunnel and Underground Space...

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Abstract

The invention relates to a deep hard rock tunnel rockburst risk consequence equivalent grading method, and belongs to the technical field of rockburst risks. The method comprises the following steps: establishing a rockburst risk consequence equivalent calculation model DC=CR+CZ+CS+CH+CG; dividing the rock burst risk consequences into casualties, direct economic losses, social influences, environmental influences and construction period delay, performing no less than 1000 times of MCS simulation sampling, obtaining the rock burst risk consequence equivalent DC, determining the optimal probability distribution function of the rock burst risk consequence equivalent DC, and drawing a cumulative probability distribution curve of the rock burst risk consequence equivalent DC; and determining a rockburst risk consequence equivalent grading standard according to the cumulative probability distribution curve of the rockburst risk consequence equivalent DC. According to the method, the grading standard for dividing the severity of the rockburst risk consequence equivalent to be extremely large, heavy, relatively large and general and the corresponding probability threshold value can be calculated, and the problem that the rockburst risk consequence loss is difficult to quantitatively characterize is effectively solved.

Description

technical field [0001] The invention relates to a rockburst risk consequence equivalent grading method for deep-buried hard rock tunnels, and belongs to the technical field of rockburst risks. Background technique [0002] Under the condition of deep burial and high ground stress, rockburst is one of the serious geological disasters faced by the construction of deep hard rock tunnels. Tunnels, Yakang Expressway Xinerlangshan Tunnel, Jinping II Hydropower Station Tunnel and other tunnel projects frequently occur. It not only causes a lot of damage to mechanical equipment and brings huge economic losses, but also seriously threatens the life safety of construction workers. Facing the problem of rockburst disasters that restrict the safe construction of deep-buried hard rock tunnels, how to reasonably determine the degree of loss of rockburst risk consequences and to study and determine the classification method of rockburst risk consequences is of great importance for quantit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0635G06Q10/06393G06Q50/265
Inventor 吴忠广吴顺川陈宗伟李娟田万利王冀潘硕张光常新科
Owner CHINA ACAD OF TRANSPORTATION SCI
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