Argillaceous soft rock roadway partition multi-granularity grouting reinforcement method

Abstract

The invention provides an argillaceous soft rock roadway partition multi-granularity grouting reinforcement method. A corresponding geological state is evaluated according to geological information data of a specific roadway, drilling points of shallow grouting holes and deep grouting holes are designed in the roadway according to the evaluated geological state, along with tunneling of the roadway, the periphery of the roadway is anchored, and a concrete and silica sol spray layer is arranged; the shallow grouting holes are constructed in the sides and a top plate and a bottom plate of the roadway, hole sealing grouting is carried out, the deep grouting holes are constructed in the pre-designed drilling points of the deep grouting holes, hole sealing grouting is carried out, and therefore grout is effectively sealed and reinforced in a deep virgin rock region. Shallow broken region surrounding rock is reinforced, water molecules, air molecules and crack water are prevented from entering a channel of a jet-grouted solid, the anti-deformation capacity and durability are improved, and the problems that after an argillaceous soft rock roadway encounters water, prominent non-linear large deformation, remarkable rheology and disturbance are generated are solved.

Description

technical field [0001] The invention relates to a grouting reinforcement method, which is suitable for a grouting reinforcement method with multi-grain size in muddy soft rock roadway partitions used for roadway support underground in coal mines. Background technique [0002] The argillaceous soft rock roadway is a composite surrounding rock roadway with physical characteristics such as high stress, jointing, and water swelling and softening, especially the physical characteristics of water swelling, which is known as one of the "cancers" of underground engineering, which will lead to The large deformation and damage of the surrounding rock of the roadway may even cause catastrophic engineering accidents. The complexity of the stress state and the variability of the water conditions of the argillaceous soft rock roadway determine its complex deformation mechanism, which is a practical feature that is difficult to be effectively controlled by a single support method in terms ...

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Problems solved by technology

However, silica sol only has limited cohesive force, and the reinforcement effect is not ideal.

[0005] In summary, the cement slurry reinforcement method can effectively seal the crack system and strengthen the surrounding rock in the shallow crushed area, but the cement slurry has little effect on the micro-pores and micro-cracks developed in the deep seepage shielding area of ​​the roadway surrounding rock

Silica sol slow seepage reinforcement method can greatly seal the microporous fissures in deep soft rock matrix, and the sealing effect is good, but the silica sol has insufficient cohesive force, and the reinforcement effect is not ideal

Therefore, these existing methods all have certain shortcoming and deficiency

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