CN104533486A - Bolting-grouting reinforcement method for remained roadway along goaf by use of self-drilling hollow grouting anchor cable - Google Patents

Bolting-grouting reinforcement method for remained roadway along goaf by use of self-drilling hollow grouting anchor cable Download PDF

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Publication number
CN104533486A
CN104533486A CN201510049975.8A CN201510049975A CN104533486A CN 104533486 A CN104533486 A CN 104533486A CN 201510049975 A CN201510049975 A CN 201510049975A CN 104533486 A CN104533486 A CN 104533486A
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CN
China
Prior art keywords
anchor
cable
grouting
self
anchor cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510049975.8A
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Chinese (zh)
Inventor
范浩
李少波
王煜
姜琦
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Anhui University of Science and Technology
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Anhui University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui University of Science and Technology filed Critical Anhui University of Science and Technology
Priority to CN201510049975.8A priority Critical patent/CN104533486A/en
Publication of CN104533486A publication Critical patent/CN104533486A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/006Lining anchored in the rock
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00Setting anchoring-bolts
    • E21D20/02Setting anchoring-bolts with provisions for grouting
    • E21D20/021Grouting with inorganic components, e.g. cement
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection

Abstract

The invention provides a bolting-grouting reinforcement method for a remained roadway along goaf by use of a self-drilling hollow grouting anchor cable. The grouting anchor cable comprises an anchor cable front end, a main anchor cable body, a grouting pipe, grout outlets, a supporting plate, a steel base plate, a lock and a grout stopping plug; the reinforcement of the remained roadway along goaf is realized by use of the processes of drilling, putting in a resin cartridge, mounting the anchor cable, grouting, mounting the grout stopping plug and the like; threads are formed on the outer surface of the front end of the anchor cable; the grout outlets are evenly distributed in the wall of the grouting pipe; the supporting plate, the steel base plate and the lock are arranged on the part, next to the roadway wall, of the anchor cable. As a result, the hollow grouting anchor cable adopted by the bolting-grouting reinforcement method for the remained roadway along goaf is simple in structure, capable of self-drilling into surrounding rock, and convenient to mount; the front end of the anchor cable can be anchored by use of resin and the middle section of the anchor cable can be anchored by virtue of grouting, and therefore, resin anchoring and grouting anchoring of the anchor cable are combined to modify the surrounding rock, and a good anchoring effect is achieved.

Description

A kind of self-drilling hollow grouting cable anchor is to the anchor pouring reinforcement method in gob side entry retaining tunnel
Technical field
The present invention relates to a kind of mine grouting cable anchor to the supporting method in tunnel, particularly a kind of self-drilling hollow grouting cable anchor carries out the method for anchor pouring reinforcement to gob side entry retaining tunnel.
Background technology
At present, edge air gallery technology is widely used in Chinese large-sized mine, simultaneously, along with the minimizing day by day of superficial part coal resources, colliery enters deep mining state successively, because Coal Exploitation is dark and the increase of geostatic stress, gob side entry retaining strata behavior analysis of roadway manifests usually comparatively violent, country rock is comparatively broken, anchor is poor, anchor pole cannot give full play to its performance, only have by anchor cable Tunnel Pressure to be delivered in stable rock stratum, deep and could control roadway deformation with stable, and use grouting cable anchor anchoring can be combined with slip casting, while top board active enforcement, modification is carried out to country rock, save operation, anchoring effect is better.
Summary of the invention
The object of the invention is to overcome existing anchor pole, anchor cable to the weak point of deep gob side entry retaining roadway support, provide one to be convenient to install, the good self-drilling hollow grouting cable anchor of supporting effect is to the anchor pouring reinforcement method in gob side entry retaining tunnel.
For achieving the above object, the present invention is achieved by the following technical solutions:
Self-drilling hollow grouting cable anchor, to the anchor pouring reinforcement method in gob side entry retaining tunnel, comprises following four steps:
A, first according to anchor cable Design of length drilling depth, then surveying and locating, use monomer roofbolt rig or side jumbolter press design attitude bore top board and help anchor cable hole;
B, with self-drilling hollow grouting cable anchor, 2 Z2850 resin anchoring agents are pushed the boring end, propelling limit, limit is stirred, and arrives and fully to contact with anchor cable fore-end at the bottom of hole and after solidifying, then install supporting plate, billet and lockset until resin explosive roll;
C, installation grouting equipment, inject slurries by the Grouting Pipe slurry filling machine of anchor cable, with rear slurry along crack diffusion in wall, with after coagulation, and anchor cable and wall is connected as a single entity.
D, load onto stop grouting plug at anchor cable tail end.
The present invention solves another technical scheme that its technical problem takes: this self-drilling hollow grouting cable anchor is to the anchor pouring reinforcement method in gob side entry retaining tunnel, be characterized in: when described self-drilling hollow grouting cable anchor is reinforced tunnel, gob side entry retaining tunnel, include resin anchoring and slip casting anchoring two kinds of anchorage styles.
The present invention solves another technical scheme that its technical problem takes: this self-drilling hollow grouting cable anchor is to the anchor pouring reinforcement method in gob side entry retaining tunnel, be characterized in: described injecting paste material adopts 425# repaid hardening sulphoaluminate cement, and water/binder ratio is 0.9 ~ 1.1.
The present invention solves the technical scheme that its technical problem takes: this for comprising anchor cable front end, Bower Anchor cable body, Grouting Pipe, slurry outlet, supporting plate, billet, lockset and stop grouting plug to the self-drilling hollow grouting cable anchor in the anchor pouring reinforcement method in gob side entry retaining tunnel, be characterized in: the external surface of anchor cable front end is provided with screw thread, slurry outlet is evenly distributed in Grouting Pipe tube wall, and anchor cable is provided with supporting plate, billet and lockset near wall place.
The present invention solves the another technical scheme that its technical problem takes: this for the self-drilling hollow grouting cable anchor in the anchor pouring reinforcement method in gob side entry retaining tunnel, is characterized in: the tip of described anchor cable front end is the taper that drift angle is 60 °.
The present invention solves the another technical scheme that its technical problem takes: this for the self-drilling hollow grouting cable anchor in the anchor pouring reinforcement method in gob side entry retaining tunnel, be characterized in: the described anchor cable leading exterior surface depth of thread is 11 ~ 12mm, and pitch is 20 ~ 22mm.
The present invention solves the another technical scheme that its technical problem takes: this for the self-drilling hollow grouting cable anchor in the anchor pouring reinforcement method in gob side entry retaining tunnel, is characterized in: described Bower Anchor cable body is entwined by eight high strength steel strands.
The present invention solves the another technical scheme that its technical problem takes: this for the self-drilling hollow grouting cable anchor in the anchor pouring reinforcement method in gob side entry retaining tunnel, is characterized in: described slurry outlet spacing is 90 ~ 100mm.
Therefore, this self-drilling hollow grouting cable anchor provided by the present invention is to the anchor pouring reinforcement method in gob side entry retaining tunnel, and grouting cable anchor structure used is simple, certainly can drill into country rock, easy for installation; Anchor cable front end can adopt resin anchoring, and interlude can adopt slip casting anchoring, thus achieves the resin anchoring of anchor cable and the combination of slip casting anchoring, and carry out modification to country rock, anchoring effect is good.
Accompanying drawing explanation
A kind of self-drilling hollow grouting cable anchor that Fig. 1 provides for the embodiment of the present invention is to the structural representation of the anchor pouring reinforcement method in gob side entry retaining tunnel.
The self-drilling hollow grouting cable anchor structural representation that the anchor pouring reinforcement method of a kind of self-drilling hollow grouting cable anchor to gob side entry retaining tunnel that Fig. 2 provides for the embodiment of the present invention uses.
The self-drilling hollow grouting cable anchor A-A cross-sectional view that the anchor pouring reinforcement method of a kind of self-drilling hollow grouting cable anchor to gob side entry retaining tunnel that Fig. 3 provides for the embodiment of the present invention uses.
In figure: 1-self-drilling hollow grouting cable anchor, 2-wall, 3-tunnel, 4-anchor cable front end, 5-Bower Anchor cable body, 6-Grouting Pipe, 7-slurry outlet, 8-supporting plate, 9-billet, 10-lockset, 11-stop grouting plug, 12-steel strand.
Detailed description of the invention
With reference to Fig. 1 ~ 3, a kind of self-drilling hollow grouting cable anchor that the embodiment of the present invention provides, to the anchor pouring reinforcement method in gob side entry retaining tunnel, comprises following four steps.
A, first according to self-drilling hollow grouting cable anchor 1 Design of length drilling depth, then surveying and locating, use monomer roofbolt rig or side jumbolter press design attitude bore top board and help anchor cable hole;
B, with self-drilling hollow grouting cable anchor 1,2 Z2850 resin anchoring agents are pushed the boring end, propelling limit, limit is stirred, and arrives and fully to contact with anchor cable fore-end at the bottom of hole and after solidifying, then install supporting plate 8, billet 9 and lockset 10 until resin explosive roll;
C, installation grouting equipment, inject slurries by the Grouting Pipe 6 of self-drilling hollow grouting cable anchor 1 with slurry filling machine, with rear slurry along crack diffusion in wall 2, then solidifies, and anchor cable 1 and wall 2 are connected as a single entity.
D, load onto stop grouting plug 11 at anchor cable tail end.
When described tunnel, self-drilling hollow grouting cable anchor 1 pair of gob side entry retaining tunnel 3 reinforces, include resin anchoring and slip casting anchoring two kinds of anchorage styles.
Described injecting paste material adopts 425# repaid hardening sulphoaluminate cement, and water/binder ratio is 0.9 ~ 1.1.
Described self-drilling hollow grouting cable anchor 1 includes anchor cable front end 4, Bower Anchor cable body 5, Grouting Pipe 6, slurry outlet 7, supporting plate 8, billet 9, lockset 10 and stop grouting plug 11, the external surface of anchor cable front end 4 is provided with screw thread, slurry outlet 7 is evenly distributed in Grouting Pipe 6 tube wall, and anchor cable 1 is provided with supporting plate 8, billet 9 and lockset 10 near wall 2 place.
Described Bower Anchor cable body 5 is entwined by eight high strength steel strands 12.

Claims (8)

1. self-drilling hollow grouting cable anchor is to the anchor pouring reinforcement method in gob side entry retaining tunnel, it is characterized in that: comprise following four steps:
A, first according to anchor cable Design of length drilling depth, then surveying and locating, use monomer roofbolt rig or side jumbolter press design attitude bore top board and help anchor cable hole;
B, with self-drilling hollow grouting cable anchor, 2 Z2850 resin anchoring agents are pushed the boring end, propelling limit, limit is stirred, and arrives and fully to contact with anchor cable fore-end at the bottom of hole and after solidifying, then install supporting plate, billet and lockset until resin explosive roll;
C, installation grouting equipment, inject slurries by the Grouting Pipe slurry filling machine of anchor cable, with rear slurry along crack diffusion in wall, with after coagulation, and anchor cable and wall is connected as a single entity.
D, load onto stop grouting plug at anchor cable tail end.
2. a kind of self-drilling hollow grouting cable anchor according to claim 1 is to the anchor pouring reinforcement method in gob side entry retaining tunnel, its feature is being: when described self-drilling hollow grouting cable anchor is reinforced tunnel, gob side entry retaining tunnel, include resin anchoring and slip casting anchoring two kinds of anchorage styles.
3. a kind of self-drilling hollow grouting cable anchor according to claim 1 is to the anchor pouring reinforcement method in gob side entry retaining tunnel, and its feature is being: described injecting paste material adopts 425# repaid hardening sulphoaluminate cement, and water/binder ratio is 0.9 ~ 1.1.
4. one kind for the self-drilling hollow grouting cable anchor in the method for claim 1, it is characterized in that: described self-drilling hollow grouting cable anchor comprises: anchor cable front end, Bower Anchor cable body, Grouting Pipe, slurry outlet, supporting plate, billet, lockset and stop grouting plug, the external surface of anchor cable front end is provided with screw thread, slurry outlet is evenly distributed in Grouting Pipe tube wall, and anchor cable is provided with supporting plate, billet and lockset near wall place.
5. self-drilling hollow grouting cable anchor according to claim 4, is characterized in that: the tip of described anchor cable front end is the taper that drift angle is 60 °.
6. self-drilling hollow grouting cable anchor according to claim 4, is characterized in that: the outer surface thread degree of depth of described anchor cable front end is 11 ~ 12mm, and pitch is 20 ~ 22mm.
7. self-drilling hollow grouting cable anchor according to claim 4, is characterized in that: described Bower Anchor cable body is entwined by eight high strength steel strands.
8. self-drilling hollow grouting cable anchor according to claim 4, is characterized in that: described slurry outlet spacing is 90 ~ 100mm.
CN201510049975.8A 2015-01-30 2015-01-30 Bolting-grouting reinforcement method for remained roadway along goaf by use of self-drilling hollow grouting anchor cable Pending CN104533486A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510049975.8A CN104533486A (en) 2015-01-30 2015-01-30 Bolting-grouting reinforcement method for remained roadway along goaf by use of self-drilling hollow grouting anchor cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510049975.8A CN104533486A (en) 2015-01-30 2015-01-30 Bolting-grouting reinforcement method for remained roadway along goaf by use of self-drilling hollow grouting anchor cable

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CN104533486A true CN104533486A (en) 2015-04-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107503778A (en) * 2017-09-12 2017-12-22 新汶矿业集团有限责任公司 The method that gob side entry retaining is realized using grouting cable anchor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107503778A (en) * 2017-09-12 2017-12-22 新汶矿业集团有限责任公司 The method that gob side entry retaining is realized using grouting cable anchor

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Application publication date: 20150422