A divisional construction method for tunnels passing through gobs
A construction method and goaf technology, applied in tunnels, tunnel linings, mining equipment, etc., can solve problems such as support system failure and vault collapse, reduce vault collapse, avoid excessive cumbersomeness, and have good governance effects Effect
Active Publication Date: 2022-03-11
ANHUI UNIVERSITY OF ARCHITECTURE
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Problems solved by technology
[0005] The purpose of the present invention is to provide a construction method for a tunnel passing through the goaf to at least solve the problems of accidents such as vault collapse and support system failure under severe conditions.
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[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
[0035] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0036] According to specific embodiments of the present invention, such as figure 1 and figure 2 As shown, the present invention provides a kind of construction method of the tunnel that passes through goaf, comprises the following steps:
[0037] Step S1, select a section ...
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The invention belongs to the technical field of tunnel construction, and specifically provides a construction method for a tunnel passing through a goaf, comprising the following steps: Step S1, selecting a section whose height from the tunnel vault to the goaf floor is H; and step S2, collecting tunnel In-situ stress P0 in the site area; step S3, calculate the dimensionless parameter index value according to the value H and the tunnel site area in-situ stress P0 obtained in step S2, and distribute the dimensionless parameter index value in proportion to the weight coefficient to obtain the tunnel under-piercing The partition quantitative evaluation value of the empty area; step S4, according to the partition quantitative evaluation value obtained in step S3, divide the pre-excavation tunnel into four types: no influence area Δ1, weak influence area Δ2, medium influence area Δ3 and strong influence area Δ4 Partitioning; step S5, according to the partitioning in step S4, corresponding construction methods are adopted respectively. The invention not only prevents the cost from exceeding the original scheme, but also reduces the occurrence of accidents such as vault collapse and support system failure.
Description
technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a construction method for a tunnel passing through a goaf. Background technique [0002] With the rapid development of my country's economy, the demand for transportation has increased sharply, and expressways and high-speed railways have grown rapidly. The role of tunnels in corresponding projects has become increasingly important. In Shanxi, Inner Mongolia and other major coal-producing provinces in Northwest China, many tunnels pass through goafs. area, especially the goaf undercutting is the most common. Due to the complex distribution of coal-measure strata in my country and the irregular and wide-ranging mined-out area, the construction of tunnels passing through the mined-out area mainly depends on engineering experience and lacks effective guidance measures. [0003] At present, the construction of tunnels passing through the goaf is mainly based o...
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IPC IPC(8): E21D9/00E21D11/10
CPCE21D9/00E21D11/10
Inventor 潘锐刘洋叶中豹程桦曹广勇
Owner ANHUI UNIVERSITY OF ARCHITECTURE