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Roadway or tunnel surrounding rock shielding protection structure and method

A technology of shielding protection and protective structure, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to achieve strong support and protection capabilities, optimized protection effects, and a high degree of integration

Active Publication Date: 2020-07-31
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a roadway or tunnel surrounding rock shielding protection structure and method to solve any of the above-mentioned prior art and other potential problems

Method used

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  • Roadway or tunnel surrounding rock shielding protection structure and method
  • Roadway or tunnel surrounding rock shielding protection structure and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051]Special shielding material raw materials include the following components by weight: 8 parts of silicon carbide, 4.5 parts of graphite, 2 parts of titanium powder, 4.5 parts of aluminum powder, 42 parts of steel slag, 35 parts of fly ash, 1.5 parts of calcium carbonate and methyl fiber Vegetable 2.5 parts;

[0052] Special shielding material preparation steps:

[0053] S2.1) Weigh each material respectively according to the above-mentioned characteristic shielding material composition ratio;

[0054] S2.2) putting silicon carbide, aluminum powder, steel slag, and fly ash into a ball mill for ball milling for 11 hours to obtain a mixed powder;

[0055] S2.3) putting graphite and titanium powder into a ball mill and milling for 7 hours to obtain a mixed powder;

[0056] S2.4) heating the mixed powder after ball milling in step S2.2) to 1000° C. to melt to form a melt;

[0057] S2.5) Put the mixed powder after ball milling in step S2.3) into the melt described in step S2...

Embodiment 2

[0069] Shock wave experiment:

[0070] Required equipment: pressure sensor (to measure the peak pressure of the shielding protection material under the action of shock stress wave), support body (to support the fixed test sample), shock stress wave barrier device (to detect the impact of local stress wave shock), explosives (select spherical TNT ), explosive suspension brackets and other related equipment.

[0071] Dispersion test of special shielding material board on local stress wave impact: the test sample is 20cm thick bamboo concrete board, 10cm thick special shielding material board, length and width are 100cm, 600gB explosive, test distance 1 meter, special shielding material board is in front A barrier baffle is set at 1cm, and a circular hole with a radius of 5cm is left in the center of the barrier baffle. The barrier baffle and the thin bamboo concrete slab are fixed by the support body, and the special shielding material board is attached to the thin bamboo concre...

Embodiment 3

[0077] Experiments on the relationship between the dispersion effect of the special shielding material plate on the impact pressure of the stress wave and the composition of the raw materials:

[0078] Test method is with embodiment 2;

[0079] Through the raw material composition and ratio orthogonal test, the two components of titanium and aluminum in the raw material have a significant impact on the stress wave shock dispersion effect of the special shielding material, and when the weight ratio is close to 5:9, the total content is close to 7±3%. , the dispersion effect is the best, can reach more than 85%, which is at least 5% higher than other optimized ratio combinations, so the titanium powder and aluminum powder in the special shielding material raw materials are composed according to the following parts by weight: titanium powder 2-3 parts, 4-5 parts of aluminum powder, and other components according to the following parts by weight: 8-10 parts of silicon carbide, 3-6...

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Abstract

The invention discloses a roadway or tunnel surrounding rock shielding protection structure and method. Under the action of ground pressure, bare surrounding rocks are formed after a roadway or tunnelis excavated and formed. The invention provides a multilayer combined shielding protection structure and method; a special shielding layer is constructed by injecting a special shielding material; afine bamboo concrete layer is constructed by pouring fine bamboo concrete; an energy absorption controller is provided to build an energy absorption control layer and a bracket which is shaped like aChinese character ''ya'' and is constructed by a steel pipe support is erected; the roadway or tunnel surrounding rock shielding protection structure jointly formed by the multilayer protection structures plays a good supporting protection effect on the bare roadway or tunnel surrounding rocks, the damage of the impact stress wave can be effectively shielded, a remarkable toughness energy absorption effect on the impact energy is achieved, the residual energy can be further absorbed through the energy absorption controller and the bracket which is shaped like the Chinese character ''ya'', theimpact failure of the roadway or tunnel is avoided, and the safety of the roadway or tunnel can be effectively protected.

Description

technical field [0001] The invention belongs to the technical field of mine protection, and in particular relates to a roadway or tunnel surrounding rock shielding protection structure and method. Background technique [0002] With the rapid development of my country's economic construction, the investment in transportation infrastructure continues to increase, especially after highways and high-speed railways enter mountainous areas, a large number of tunnel projects are built. my country is also a country with many earthquakes, and most of the tunnels are routed along rivers and mountains, and there are often unfavorable conditions such as surrounding rock fragmentation, terrain bias, and even the possibility of landslides along the route. Especially when the overlying surrounding rock is affected by excavation vibration and some stress waves, it is very easy to cause geological disasters such as landslides and collapses, which will lead to difficulties in tunnel excavatio...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D11/10
CPCE21D11/00E21D11/10E21D11/105
Inventor 吕祥锋
Owner UNIV OF SCI & TECH BEIJING
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