Method for performing anchoring and grouting reinforcement inside deep well soft rock gob-side entry retaining

Abstract

The invention discloses a method for performing anchoring and grouting reinforcement inside a deep well soft rock gob-side entry retaining, and the method comprises the steps of performing deep-hole high-strength anchoring and grouting reinforcement inside a gob-side entry retaining on the basis of a lane-side filling body support at the gob-side entry retaining original support and the back production side after back production outside the front of the back production surface influenced by the back production. The method comprises the steps of 1. using a hollow anchor cable for support, namely A. arranging a rectangular or a trapezoid tunnel: a. a hollow anchor cable close to a reinforcing top board at the coal side inclines toward the coal side for 10-20 DEG; b. a hollow anchor cable for a lane at the coal side or a hollow slip-casting anchor pole is reinforced; B. arranging a semi-circular arch or other arched tunnels: arranging a vault hollow anchor cable along the direction perpendicular to the arched tangent of a tunnel; 2. Increasing a reinforcement scope: the length of the hollow slip-casting anchor cable is 4m-10m; 3. Employing a high-strength slip-casting material; and 4. slip-casting in high pressure. The method is used to bury large Three Soft coal gob-side entry retaining; the deformation of surrounding rocks can be effectively controlled; the gob-side entry retaining top board can be maintained; the tunnel section shrinkage can be reduced; and the gob-side entry retaining can be reused successfully.

Description

technical field [0001] The invention relates to the field of mine roadway support, in particular to an anchoring and grouting reinforcement method for deep mine soft rock gob-side entry entry retaining and reinforcement under the condition of deep mine soft rock. Background technique [0002] Gobside retaining is a method to maintain the mining roadway of this working face along the edge of the goaf behind the mining face, and it is used as the mining roadway of the next working face. No coal pillar is left in the middle to realize coal pillar-free mining. The use of gob-side entry retaining technology has the characteristics of reducing the amount of roadway excavation, alleviating the tense situation of mine connection, increasing the coal recovery rate, and prolonging the service life of the mine; for high-gas coal mines, Y-shaped ventilation can be realized along the gob-side entry, eliminating the need for The accumulation of gas in corners is conducive to the safe and ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the existing technology of gob-side entry retention in deep well soft rock coal seams that cannot effectively control the deformation of the surrounding rock, the roof of the entry entry is broken, the shrinkage rate of the section of the entryway is high, and the gob-side entry entry cannot be reused, the present invention provides An anchoring and grouting reinforcement method in gob-side entry retaining in deep soft rock, which can effectively control the deformation of the surrounding rock, maintain the roof of the entry and reduce the entryway Sectional shrinkage, so that gobside entry retention can be used successfully

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