Fabricated grilling anti-invert method for treating pucking

Abstract

The invention discloses a fabricated grilling anti-invert method for treating pucking, which aims at treating roadways with serious inverts, such as with large sections, dynamic pressure effect, low strength of surrounding rock, and high tectonic stress. The fabricated grilling anti-invert method for treating pucking comprises the steps as follows: a preprocessed grilling anti-invert is spliced through a bolt and concrete is poured on the anti-invert on the spot, so as to form a grilling anti-invert support with the same intensity as the surrounding rock; the gap between the support and a base plate is eliminated by filling grout behind a wall so as to increase the compactness of the concrete; and two feet of the grilling anti-invert is rigidly connected in a rock layer of the base plate through a construction rigidly-connected anchor rod, so as to further improve the flexural rigidity of the grilling anti-invert, the shearing strength of the base plate and the integrity of the two. According to the invention, the fabricated grilling anti-invert is preprocessed and spliced on the spot, so that the fabricated grilling anti-invert has the advantages of high installation accuracy, high construction speed, short exposure time of the surrounding rock, high integrity, and force evenness of the support. In addition, the grilling anti-invert makes full use of the mechanical property of an arch, so as to have a high bearing capacity, low supporting cost, no contamination, and obvious economic and social benefits, and therefore the problem of pucking control is solved.

Description

technical field [0001] The invention relates to a method for controlling the floor heave with an assembled grid anti-bottom arch, especially a method suitable for controlling the stability of the roadway floor with a large section, dynamic pressure influence, low surrounding rock strength, and large structural stress. The support method of grid anti-bottom arch. Background technique [0002] At present, with the continuous deepening of coal mine mining and the rapid improvement of mechanization, factors such as high ground stress and groundwater that have little influence on shallow mines have an increasingly prominent impact on the control of deep roadway floors. Large-section roadways built in conjunction with mechanized production It has also aggravated the difficulty of roadway bottom heave management, and the control of roadway bottom heave has become a difficult problem in the production process of coal mines. In recent years, scholars at home and abroad have also pro...

AI Technical Summary

Problems solved by technology

In recent years, scholars at home and abroad have also proposed many methods for controlling the floor drum, such as floor grouting, floor anchoring, and closed roadway supports, etc. However, these methods cannot be well applied to actual projects. Reinforce the rock mass within the grouting range, but it is difficult to control the grouting range. If the grouting does not reach a certain depth, the shallow reinforced bottom plate will have insufficient bearing capacity when subjected to deep high stress, and the reinforcement effect will not be obvious. ; It is difficult to drill downwards when the bottom plate is reinforced with anchor rods, the number of drilling holes is large, the labor intensity is high, the construction speed is slow, and the anchoring effect of the anchor rod is not ideal for the soft bottom plate; in the high-stress soft rock roadway, The closed roadway support has large deformation and insufficient rigidity, and the control effect on the bottom drum is poor

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