CN201972707U

CN201972707U - Reinforced concrete gob-side isolation wall of sandwich anchor

Info

Publication number: CN201972707U
Application number: CN2010206732602U
Authority: CN
Inventors: 惠兴田
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-20
Filing date: 2010-12-20
Publication date: 2011-09-14
Anticipated expiration: 2020-12-20

Abstract

The utility model relates to a gob-side entry driving isolation wall structure, in particular to a reinforced concrete gob-side isolation wall of a sandwich anchor. A sandwich composite structure is a composite reinforced concrete structure wall body which is combined by netting, an anchor bar (rope), concrete and coal and rock mass with a coal mass and a concrete structure as a main body as well as the netting and the anchor bar as reinforcements. The wall body with the structure can exert the self stability and bearing capability of the coal mass to the maximum, therefore gob-side entry driving anthracitic column mining is more safe and reliable. Because anthracitic column mining is carried out with the utilization of the reinforced concrete gob-side isolation wall of the sandwich anchor, the support cost can be saved, the construction effect is good, and the mining safety is good. The isolation wall with the structure is mainly used for anthracitic column mining in a coal mine and can be also applied to industries of double-arch tunnels, metallurgical mines, water conservancy, underground buildings, national defense and the like.

Description

A kind of sandwich dowel concrete is along empty divider wall

Technical field

The utility model belongs to coal mining engineering field, is specifically related to a kind of sandwich dowel concrete along empty divider wall.

Background technology

No coal column mining adopts gob side entry retaining or gob side entry driving to realize usually.Gob side entry retaining adopts grillage, close standing props, spoil bag, work stone is built a wall or concrete continuous wall etc.Another kind of mode is narrow coal column gob side entry driving.The narrow coal column of gob side entry driving is because certain width and the reinforcement supporting measure of the limited needs of coal mass strength.This narrow coal column gob side entry driving still exists the coal body width bigger, support strength deficiency, the defective that maintenance cost is high.

The utility model content

The purpose of this utility model is to be at the deficiencies in the prior art, provides a kind of continuity of coal body self and concrete high-strength characteristic utilized to form the alternative narrow coal column of complex.To reach economical, fast, purpose of safety.

For achieving the above object, the technical solution adopted in the utility model is: build anchor pole net sheet formation layer of concrete (B) structure 8 that concrete and lane group and lane are helped by laying bricks or stones in last one non-exploitation side lane group of adopting the crossheading 1 of face.The next one is adopted face crossheading 2 and is arranged in from last one and adopts the be separated by position of 2-3 rice of face crossheading 1.In driving crossheading 2, the lane group near crossheading 1 installs anchor pole and net sheet and builds concrete formation layer of concrete (A) structure 5 by laying bricks or stones at crossheading 2.It is characterized in that this sandwich dowel concrete forms combined wall along empty divider wall by layer of concrete (A) 5, layer of concrete (B) 8 and the coal and rock 9 that are clipped in the middle of layer of concrete (A) 5, the layer of concrete (B) 8, by anchor pole 6 or anchor cable 7 with concrete and the middle coal body sandwich dowel concrete structure body of wall of formation that tightens together.

Described sandwich dowel concrete partition wall is characterized in that layer of concrete (A) 5, layer of concrete (B) the 8th, makes by cast-in-place or injection or mould bag technology.Give concrete reinforcement according to requirement of strength.Arrangement of reinforcement is positioned at layer of concrete (A) 5, layer of concrete (B) 8 bodies or at external surface.

Described sandwich dowel concrete partition wall, it is interior more than 1 meter to it is characterized in that anchor pole 6 length must be goed deep into coal body, and anchor cable 7 length can penetrate body of wall according to requirement of strength and form the prestressing force dowel.

The body of wall of this structure has made full use of the continous-stable and the concrete high-strength characteristic of coal body.Utilized the anchoring and the prestressing force feature of anchor shaft anchor cable to make combined wall have the feature of prestressed concrete.Can bear the various dynamic pressures of huge geostatic stress and back production engineering.This structure can be widely used in no coal pillar mining, the Double Multi-Arch tunnel of water conservancy and road and rail, other underground buildings, civil engineering industries such as national defence.

Description of reference numerals:

1-crossheading 1;

2-crossheading 2;

The 3-coal body;

4-crossheading top concrete layer;

5-layer of concrete A;

The 6-anchor pole;

The 7-anchor cable;

8-layer of concrete B;

The sandwich coal body of 9-;

10-net sheet.

The embodiment description of drawings

Fig. 1 is that a kind of sandwich dowel concrete of the utility model is along empty divider wall embodiment one structural representation.

Fig. 2 is that a kind of sandwich dowel concrete of the utility model is along empty divider wall embodiment two structural representations.

Fig. 3 is that a kind of sandwich dowel concrete of the utility model is along empty divider wall embodiment three structural representations.

The specific embodiment

Embodiment 1:(is referring to Fig. 1)

In crossheading 1 tunneling process.Lay wire gauze and install anchor pole in side lane group by crossheading 2.Make the anchor pole pallet be close to the coal body surface.Then, sprayed mortar reaches design thickness, makes sprayed mortar and anchor pole and net sheet be combined together to form dowel layer of concrete (B) 8.

Next adopt face driving crossheading 2 to waiting, lay the net sheet in lane group by crossheading 1.Install anchor pole then, make the pallet of anchor pole unsettled and the net sheet is banded near the anchor pole tray position.Sprayed mortar makes concrete be deep into the back side of anchor pole tray back and net sheet then.Sprayed mortar needs to spray repeatedly, and each jet thickness is no more than 50mm and is advisable, and is ejected into design thickness always and just forms layer of concrete (A) 5.

Embodiment 2:(is referring to Fig. 2)

In crossheading 1 tunneling process.At the anchor pole fixing concrete mould bag of the side lane group by crossheading 2, lay the wire lath sheet and push down the net sheet with the anchor pole pallet at concrete mould bag skin.Second step is toward the interior concrete perfusion of concrete mould bag.In the 3rd step, sprayed mortar thickness reaches design thickness on anchor pole and the net sheet, makes sprayed mortar and anchor pole and net sheet be combined together to form mould bag dowel layer of concrete (B) 8.

When next adopts face driving crossheading 2, lay the net sheet in lane group by crossheading 1.Second step, install anchor pole, make the pallet of anchor pole unsettled and the net sheet is banded near the anchor pole tray position.In the 3rd step, install the back side that concrete blinding and concreting make concrete be deep into anchor pole tray back and net sheet and just form layer of concrete (A) 5.

Embodiment 3:(is referring to Fig. 3)

In crossheading 1 tunneling process.Lay wire gauze and install anchor pole in side lane group by crossheading 2.Make the anchor pole pallet be close to the coal body surface.Second step installed template and concreting thickness reaches design thickness, made concrete and anchor pole and net sheet be combined together to form dowel layer of concrete (B) 8.

Claims

1. a sandwich dowel concrete is along empty divider wall, it is characterized in that by layer of concrete A (5), layer of concrete B (8) and be clipped in layer of concrete A (5) and layer of concrete B (8) in the middle of coal and rock (9) form combined wall, by anchor pole (6) or anchor cable (7) concrete is anchored at the coal and rock of centre and forms sandwich dowel concrete structure body of wall.

2. a kind of sandwich dowel concrete according to claim 1 is along empty divider wall, it is characterized in that layer of concrete A (5), layer of concrete B (8) make by cast-in-place or injection or mould bag technology.

3. a kind of sandwich dowel concrete according to claim 1 and 2 is characterized in that along empty divider wall layer of concrete is according to the requirement of strength arrangement of reinforcement; Arrangement of reinforcement is positioned at layer of concrete A (5), layer of concrete B (8) body or at external surface.

4. a kind of sandwich dowel concrete according to claim 1 is along empty divider wall, it is characterized in that anchor pole (6) length must go deep into coal body more than 1 meter, and anchor cable (7) length can penetrate body of wall according to requirement of strength and form the prestressing force dowel.