Anchoring-grouting integrated reinforcing method for roadway floors

Abstract

The invention relates to an anchoring-grouting integrated reinforcing method for roadway floors. Aimed at the problems that the deep of the soft, fractured roadway floor in a geologically abnormal zone is hard to reinforce and floor heave is difficult to control, the anchoring-grouting integrated reinforcing method is adopted and comprises the following steps: severe grout runout or grout leakage is first prevented during grouting when the roadway floor is constructed, shallow hole grouting is then carried out to block shallow fractures and form a shallow grout-stopping layer, moreover, after grouting, the integrity of wall rocks within the grouting range is enhanced, and thereby the problem of subsequent grouting borehole collapse is solved; deep grouting holes are then constructed, grouting pipes and anchor ropes are mounted, full-length anchoring is carried out on the anchor ropes while grout is injected to solidify deep rocks, finally, channel steel, I-shaped steel and the like are adopted to combine single anchor ropes into anchor rope beams, and thereby the deformation of the roadway floor can be effectively controlled.

Description

technical field [0001] The invention relates to a treatment and reinforcement technology for the bottom plate of a coal mine roadway, in particular to an anchoring and pouring integrated reinforcement method for the bottom plate of a roadway. Background technique [0002] The roadway floor heave problem is common in coal mine roadways. At present, domestic and foreign methods and technologies to control the floor heave or reduce the volume of the floor heave include pressure relief to improve the stress state of the surrounding rock of the floor and reinforcement to improve the strength of the surrounding rock of the floor. Protection method, full-section support method such as concrete slabs and arc slabs, construction floor anchor method, floor grouting method, bottom slab vertical groove prevention method, bottom slab excavation roadway pressure relief method on both sides of the floor, loosening the two bottom corners of the floor roadway The blasting method and the met...

AI Technical Summary

Problems solved by technology

When the surrounding rock of the roadway floor is complete, the quality of the grouting hole is good. The grouting pipe can be used to construct and reinforce the deep surrounding rock, and can better control the bottom heave. The effect is extremely poor, and the main difficulties are: geological anomalies, weak and broken, and muddy roadway floor drilling quality is poor. After the drill pipe is withdrawn, only the shallow part of the roadway floor is of good quality, and the deep hole is not. Hole collapse occurs

Floor anchors and grouting pipes can only be constructed to reinforce the shallow part of the roadway floor, while anchors and grouting pipes in the deep part of the floor cannot be constructed, and the surrounding rock in the deep part of the floor cannot be reinforced

The diameter of the bottom plate drilling hole is large, while the diameter of the grouting pipe and anchor cable is small. The diameter of the drilling hole does not match the diameter of the grouting pipe and the diameter of the anchor cable, and the anchoring effect of the grouting and anchor cable is poor.

For these problems, there are no effective solutions at home and abroad.

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