A kind of grouting reinforcement method with multi-grain size in argillaceous soft rock roadway partition

Abstract

The invention relates to a multi-granularity grouting reinforcement method for argillaceous soft rock roadway partitions, which belongs to the multi-granularity grouting reinforcement method for argillaceous soft rock roadway partitions. Evaluate the corresponding geological state according to the geological information of the specific roadway, design the drilling points of shallow grouting holes and deep grouting holes in the roadway according to the evaluated geological state, and carry out anchoring and setting around the roadway as the roadway is excavated. Concrete and silica sol spray layer; construct shallow grouting holes on the side and roof of the roadway and seal the grouting, and construct deep grouting holes and seal the grouting at the pre-designed deep grouting hole drilling points, so that Effective sealing and reinforcement to the deep original rock area. It not only strengthens the surrounding rock in the shallow crushing area, but also blocks the passage of water molecules, air molecules, and fissure water into the consolidated body, thereby increasing its anti-deformation ability and durability, and solving the problem of muddy soft rock roadway after water encountering. Highlights problems such as nonlinear large deformations, significant rheology, and disturbance effects.

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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