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Underground engineering surrounding rock strength-energy support design method

A technology of underground engineering and design method, applied in underground chambers, mining equipment, earth-moving drilling and other directions, can solve the problems of dynamic impact, breaking of supporting members, insufficient elongation, etc., to avoid energy impact and ensure stability. Effect

Pending Publication Date: 2021-12-17
王琦
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Problems solved by technology

[0003] The traditional underground engineering support methods mainly have the following deficiencies: the design of the traditional support system is mostly based on the strength of the surrounding rock, and the support design is carried out according to the mechanical parameters of the support structure; while the elastic strain energy will accumulate inside the underground engineering surrounding rock, After being disturbed, dynamic impact will occur; and the traditional support system has problems such as low strength and insufficient elongation, which will easily lead to the breakage of support components, which will lead to the overall failure of the support system

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Embodiment 1

[0027] As introduced in the background technology, the performance of each support component in the traditional support system is not coupled, which can easily lead to the failure of supports one by one and lead to the overall instability of the underground engineering rock mass. A strength-energy support design method for underground engineering surrounding rock is proposed.

[0028] Provide underground surrounding rock strength-energy support design method, underground engineering surrounding rock support strength-energy support method comprehensive design criteria:

[0029] W≤L r (N S W S +N D W D )

[0030] Among them, W is the elastic strain energy of the surrounding rock within the support design range, unit: J; N S and N D are the quantities of energy-absorbing anchoring materials required per unit chamber strike length under static and dynamic conditions, unit: root; L r is the length of the chamber within the support range, unit: m; W S and W D are the maximu...

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Abstract

The invention provides an underground engineering surrounding rock strength-energy support design method, and relates to the technical field of underground engineering safety. The method comprises the following steps of establishing an underground engineering numerical calculation model to obtain surrounding rock strength and surrounding rock elastic strain energy in a support range by combining with a surrounding rock sampling load test; obtaining the mechanical and energy-absorbing performance parameters of the constant-resistance energy-absorbing anchoring material based on the experimental test of the constant-resistance energy-absorbing anchoring material; calculating support parameters of the required anchoring material based on the strength balance and energy balance of the surrounding rock by integrating the strength of the surrounding rock, the mechanical property parameters of the anchoring material, the elastic strain energy and the energy absorption performance parameters of the anchoring material; and realizing the strength support design and the energy support design to ensure the stability of the underground engineering rock mass by combining the mechanical and energy-absorbing performance parameters of the constant-resistance energy-absorbing anchoring material and comprehensively considering the strength of the surrounding rock and the internal elastic strain energy of the surrounding rock.

Description

technical field [0001] The present disclosure relates to the technical field of underground engineering safety, in particular to a method for designing surrounding rock strength-energy support for underground engineering. Background technique [0002] Underground engineering is faced with a large number of complex conditions such as high stress and extremely soft rock, which lead to stress concentration and energy accumulation in the surrounding rock, and large deformation of the surrounding rock is prone to occur, resulting in an increasing number of dynamic shock disasters and other major accidents. The support form with high strength, high elongation and high pre-tightening force is an effective way to control large deformation of surrounding rock. [0003] The traditional underground engineering support methods mainly have the following deficiencies: the design of the traditional support system is mostly based on the strength of the surrounding rock, and the support desi...

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Application Information

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IPC IPC(8): E21D11/00E21F17/18
CPCE21D11/006E21F17/18
Inventor 王琦王悦江贝王业泰
Owner 王琦
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