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

A technology of anchoring and grouting and soft rock, which is applied in the direction of earthwork drilling, installation of bolts, mining equipment, etc., can solve the problems of broken roof of the retaining roadway, high shrinkage rate of the roadway section, and reduce the shrinkage rate of the roadway section, so as to improve the constraint effect , large reinforcement range, improved strength and overall effect

Inactive Publication Date: 2016-07-20
HUAINAN MINING IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

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

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Embodiment 1

[0031] exist figure 1 , 2 shows the anchoring and grouting reinforcement method in gob-side entry retaining in deep soft rock of the present invention, and the arrangement of hollow anchoring and grouting anchor cables when anchoring and grouting reinforcement is implemented in rectangular gob-side entry retaining. Rectangular or trapezoidal gob-side entry retention is suitable for this implementation method of deep hole high-strength anchor-grouting reinforcement in the entryway.

[0032] figure 1 The gob-side entry 5 in is a rectangular roadway. The original roof bolt 01, the original roof anchor cable 02, and the original roadway side anchor 03 are the original support of the gob-side entry roadway during the excavation stage. After the roadway is used as the gob-side entry 5, one side of the mining face is referred to as the mining side 6, and the concrete filling body 6 poured on the mining side after mining is used as the roadside filling body support constructed on t...

Embodiment 2

[0049] exist Figure 4 , 5 The method of the present invention shows the arrangement of the hollow anchoring and anchoring cables when the semicircular arched gob-side entry retaining roadway 7 is implemented with high-strength anchoring and grouting reinforcement for deep holes in the roadway.

[0050] exist Figure 4 , 5 In the semicircular arched gob-side entry retention 7 shown, the original roof anchor cable 04 and the original roadside anchor cable 05 are the original support of the roadway during the excavation stage. The roadway is used as the back of the gob-side entry retention 7 , and its mining side is supported by the concrete filling body 6 after mining, and is the side of the mining side of the gob-side entry retention 7 . There is no hollow anchor anchor cable support arranged on this side. The original roof anchor cable 04 and the original roadside anchor cable 05 are ordinary steel strand anchor cables.

[0051] exist Figure 4 , 5 As shown in the 7th ...

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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 ...

Claims

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Application Information

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IPC IPC(8): E21D20/02
Inventor 陶杰始祖龙李万峰王传兵肖长春蒋敬平李建建
Owner HUAINAN MINING IND GRP
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