Underground engineering multi-stage complete control method

Abstract

The invention discloses an underground engineering multi-stage complete control method. The problem that in the prior art, a surrounding rock control method is prone to initiating safety accidents issolved. The underground engineering multi-stage complete control method has the beneficial effects that underground surrounding rock under complex conditions can be effectively retained and protectedaccording to a multi-stage retaining and protecting method. According to the scheme, the underground engineering multi-stage complete control method comprises the steps that after underground engineering is excavated, the surrounding rock is subjected to comprehensive classification; according to a surrounding rock comprehensive classification result, a surrounding rock external loading model is established, and surrounding rock stability numerical simulation and retaining and protecting mechanical models of different retaining and protecting stages are established; surrounding rock deformation indexes and retaining and protecting force-wearing indexes are obtained according to the surrounding rock stability numerical simulation and retaining and protecting mechanical models, and an optimal design scheme of multi-stage retaining and protecting is chosen; after the optimal design scheme is applied on site, the surrounding rock control effect is estimated in real time; and according to areal-time estimation result of the surrounding rock control effect, the multi-stage complete control retaining and protecting design is dynamically optimized.

Description

technical field [0001] The invention relates to the technical field of safety in underground engineering, in particular to a phase-by-stage complete control method for underground engineering. Background technique [0002] my country's underground projects such as mine roadways, traffic tunnels, subways, and hydropower stations have achieved unprecedented development, and it has become the world's largest country in the number and scale of underground engineering construction. [0003] With the development and utilization of underground engineering entering a new stage, underground engineering is gradually developing towards the construction of deep underground spaces and underground spaces with complex conditions. Underground engineering with complex geological conditions such as high stress, extremely weak, and fault fracture zones has increased sharply. Engineering problems such as landslides, large deformations, and broken supporting components often occur, resulting in ...

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Problems solved by technology

[0005] (1) For underground engineering under complex geological conditions, the single traditional support methods such as anchor net spraying and I-beam are insufficient in strength and rigidity, which can easily lead to serious safety accidents such as vault caving, large deformation, and support component breakage

[0006] (2) At present, there is no effective method for rapid in-situ classification of surrounding rock and real-time evaluation method for surrounding rock control effect. Support parameters and timing are often determined according to engineering analogy. Support design lacks quantitative basis and optimization is not timely, which may easily lead to improper support The problem

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