CN115013057A - Novel coal mine airtight wall capable of being constructed quickly and construction process thereof - Google Patents

Abstract

The invention discloses a fast-constructed new type of coal mine airtight wall and its construction process, including a roadway roof, a roadway bottom plate, two sides of the roadway, grooves, cross bars and EPS module walls. The fast-constructed new coal mine airtight wall is constructed according to the following process: first, a groove with a depth of 30cm is dug in the roadway roof, roadway floor and roadway where the airtight wall needs to be set; secondly, EPS modules of different specifications are inserted into reserved The longitudinal steel bars are fixed by concave-convex buckles or sockets, and then horizontal steel bars are placed in the steel bar grooves to form cross steel bars; furthermore, concrete is poured in the EPS module wall; finally, EPS is placed inside the closed area. The surface of the module wall is sprayed with an inner protective coating, and the surface of the EPS module wall outside the closed area is sprayed with an expanded vitrified microbead layer, a bonding mortar layer, a crack-resistant mesh cloth, a plastering mortar layer and an outer spray layer in sequence. The rapidly constructed new type of coal mine airtight wall has a firm structure, strong compressive capacity and good thermal insulation performance.

Description

A new type of coal mine airtight wall constructed quickly and its construction technology

technical field

The invention relates to the technical field of temporary and permanent sealing walls of coal mines, in particular to a rapidly constructed new type of sealing walls of coal mines and a construction technique thereof.

Background technique

Temporary and permanent containment walls constructed underground in coal mines are the main ventilation structures in mines and an important project for closing fire areas. At present, the temporary and permanent containment walls constructed underground in coal mines are mainly masonry structures and all-concrete structures. The construction period of masonry structure and concrete structure airtight wall is as long as one week, the required wall material is heavy, transportation is difficult, and the construction process is complicated, and the labor time of workers is long. Masonry and concrete structural walls are fully rigid structures with high strength. When the roadway is pressed, it is easy to damage the wall, and it is difficult to restore the wall. Coal mines are prone to dangerous situations such as poor sealing of the fire zone and abnormal gas gushing.

Therefore, how to quickly and efficiently construct temporary and permanent containment walls with good stability in coal mines to ensure the safe production of coal mines and save manpower, material resources and financial investment in coal mines has become an urgent problem for scientific researchers to solve.

SUMMARY OF THE INVENTION

Aiming at the problems of the above-mentioned prior art, such as long construction period, difficult material transportation, long labor time for workers, poor wall structure stability, and difficulty in repairing after damage, the present invention provides a fast-constructed new type of coal mine airtight wall and its construction technology .

A fast-constructed new type of coal mine airtight wall and a construction process thereof of the present invention comprise a roadway roof (1), a roadway bottom plate (2), two sides of the roadway (3), grooves (4), cross steel bars (5) and EPS. The module wall (6); the EPS module wall (6) on the inner side of the enclosed area is sprayed with an inner protective coating (7) of a high-density fire-retardant and flame-retardant polymer material; the EPS module wall (6) on the outer side of the enclosed area 6) The surface is sequentially sprayed with an expanded vitrified microbead layer (8), a bonding mortar layer (9), a crack-resistant mesh cloth (10), a plastering mortar layer (11) and an outer spray coating (12); the A new type of coal mine containment wall that is quickly constructed is constructed according to the following process:

The first stage: dig grooves (4) with a depth of 30 cm in the roadway roof (1), roadway bottom plate (2) and roadway two sides (3) where airtight walls need to be installed;

The second stage: According to the section shape of the roadway where the airtight wall is set up, insert EPS modules (13) of different types, specifications and shapes into the reserved longitudinal steel bars (14), and insert them through the concave and convex buckles (1305) or the sockets. (1302) Fixing, and then placing transverse reinforcement bars (15) in the reinforcement grooves (1306) to form cross reinforcement bars (5);

The third stage: in the formed EPS mold wall (6), pouring concrete (16) can form a solid wall in the form of soft-hard-soft;

The fourth stage: the inner protective coating (7) of high-density fire-retardant and flame-retardant polymer material is sprayed on the surface of the EPS module wall (6) on the inner side of the enclosed area, and the surface of the EPS module wall (6) outside the enclosed area is sprayed and expanded in sequence A vitrified microbead layer (8), a bonding mortar layer (9), a crack-resistant mesh cloth (10), a plastering mortar layer (11) and an outer spray coating (12).

The EPS module body (13) is heated and foamed with expandable beads, and a foamed plastic profile or component with a closed-cell structure is obtained by one-time molding of factory standardized production equipment, and the thickness of the thermal insulation boards (1301) on both sides is 6cm. , connected by a movable rib (1303), with a gap of 13cm in the middle.

On the components of the EPS module body (13), sockets (1302) are evenly distributed on the upper and lower sides, some EPS module body (13) components have concave and convex buckles (1305) on the left and right sides, and evenly distributed dovetail grooves (1305) on the inner and outer surfaces. 1304), the reinforcing bar slot (1306) is located on the movable rib (1303).

The longitudinal reinforcing bars (14) and the transverse reinforcing bars (15) in the cross bars (5) are connected and fixed by thin steel wires, and the lengths all need to be extended to the roof (1), the bottom plate (2) and the two sides (2) of the roadway of the coal mine. 3) inside.

Concrete (16) is poured once every time the EPS module walls (6) are overlapped with three layers of EPS module bodies (13).

The spraying thickness of the bonding mortar layer (9) is 0.5 cm.

The spraying thickness of the plastering mortar layer (11) is 0.8 cm.

Beneficial effects of the present invention: The present invention provides a rapidly constructed new type of coal mine airtight wall and its construction technology, which breaks the original masonry and concrete airtight wall structure, proposes the use of EPS modules with lighter weight and lower cost, and adopts the The simple construction process of building block constructs a soft-hard-soft temporary or permanent EPS module wall. The temporary or permanent sealing wall constructed by this technical solution has high stability, can effectively remove the destructive force of the mine pressure, has excellent thermal insulation and sealing performance, and saves 200 yuan per square meter of construction cost compared with the masonry structure; The technology can shorten the construction time of the airtight wall to one work shift (within 8 hours), which greatly saves the manpower, material resources and financial resources of the coal mine.

Description of drawings

1 is a schematic diagram of the overall structure of a new type of coal mine airtight wall constructed quickly provided by the present invention

Fig. 2 is A-A sectional view of Fig. 1

Figure 3 is a schematic diagram of the connection of the concave buckle and the convex buckle EPS module body

Figure 4 is a schematic diagram of the structure of EPS modules with different shapes

Figure 5 is a schematic diagram of the connection between a single EPS module body and a transverse steel bar

In the picture: 1- Roadway roof; 2- Roadway bottom plate; 3- Roadway two gangs; 4- Groove; 5- Cross steel bar; 6- EPS module wall; 7- Inner protective coating; layer; 9-bonding mortar layer; 10-crack-resistant mesh cloth; 11-plastering mortar layer; 12-external spray layer; 13-EPS module body; 1301-insulation board on both sides; 1302-connection socket; Rib; 1304-dovetail groove; 1305-concave-convex buckle; 1306-steel groove; 14-longitudinal steel bar; 15-transverse steel bar; 16-concrete.

Detailed ways

Below in conjunction with the accompanying drawings, a specific embodiment of the present invention will be described in detail:

As shown in Fig. 1--Fig. 5: a kind of fast-constructed novel coal mine airtight wall of the present invention and its construction technology, comprise roadway roof 1, roadway bottom plate 2, roadway two gangs 3, groove 4, cross steel bar 5 and EPS Modular wall 6. The surface of the EPS module wall 6 on the inner side of the enclosed area is sprayed with an inner protective coating 7 of high-density fire-retardant and flame-retardant polymer material; the surface of the EPS module wall 6 outside the enclosed area is sprayed with an expanded vitrified microbead layer in sequence. 8. Bonding mortar layer 9, anti-crack mesh cloth 10, plastering mortar layer 11 and outer spray layer 12;

In the specific embodiment of the present invention, the components of the EPS module body 13 have sockets 1302 evenly distributed on the upper and lower sides, some of the components of the EPS module body 13 have concave and convex buckles 1305 on the left and right sides, and evenly distributed dovetail grooves 1304 on the inner and outer surfaces. The groove 1306 is located on the movable rib 1303; the longitudinal reinforcement 14 and the transverse reinforcement 15 in the cross reinforcement 5 are connected and fixed by thin steel wires, and the lengths need to extend to the roof 1 of the coal mine roadway, the roadway bottom plate 2 and the two sides of the roadway 3; EPS module The wall 6 is poured with concrete 16 once every three layers of EPS modules 13 are overlapped; the spraying thickness of the bonding mortar layer 9 is 0.5 cm; the spraying thickness of the plastering mortar layer 11 is 0.8 cm.

A rapidly constructed new type of coal mine containment wall is constructed according to the following process:

The first stage: dig a groove 4 with a depth of 30cm in the roadway roof 1, roadway bottom plate 2 and roadway two gangs 3 where a closed wall needs to be installed;

The second stage: according to the section shape of the roadway where the airtight wall is established, insert the EPS modules 13 of different types, specifications and shapes into the reserved longitudinal steel bars 14, and fix them through the concave and convex buckles 1305 or the sockets 1302, and then, in the The transverse reinforcement 15 is placed in the reinforcement slot 1306 to form a cross reinforcement 5;

The third stage: in the formed EPS mold wall 6, pouring concrete can form a solid wall in the form of soft-hard-soft;

The fourth stage: spray the inner protective coating 7 of high-density fire-retardant and flame-retardant polymer material on the surface of the EPS module wall 6 on the inner side of the enclosed area, and spray the expanded vitrified microbead layer 8 on the surface of the EPS module wall 6 outside the enclosed area in sequence. , Bonding mortar layer 9, anti-crack mesh cloth 10, plastering mortar layer 11 and outer spray layer 12.

Claims (7)

1. The present invention discloses a fast-constructed new type of coal mine airtight wall and its construction process, including a roadway roof (1), a roadway bottom plate (2), two sides of the roadway (3), grooves (4), and intersecting steel bars (5). ) and the EPS module wall (6); the EPS module wall (6) on the inner side of the closed area is sprayed with an inner protective coating (7) of high-density fire-retardant and flame-retardant polymer material; the EPS module on the outer side of the closed area is sprayed with an inner protective coating (7) The surface of the wall (6) is sequentially sprayed with an expanded vitrified microbead layer (8), a bonding mortar layer (9), a crack-resistant mesh cloth (10), a plastering mortar layer (11) and an outer spray layer (12) ; Described a kind of rapid construction of new coal mine airtight wall is constructed according to the following process: The first stage: dig grooves (4) with a depth of 30 cm in the roadway roof (1), roadway bottom plate (2) and roadway two sides (3) where airtight walls need to be installed; The second stage: According to the section shape of the roadway where the airtight wall is set up, insert EPS modules (13) of different types, specifications and shapes into the reserved longitudinal steel bars (14), and insert them through the concave and convex buckles (1305) or the sockets. (1302) Fixing, and then placing transverse reinforcement bars (15) in the reinforcement grooves (1306) to form cross reinforcement bars (5); The third stage: in the formed EPS mold wall (6), pouring concrete (16) can form a solid wall in the form of soft-hard-soft; The fourth stage: the inner protective coating (7) of high-density fire-retardant and flame-retardant polymer material is sprayed on the surface of the EPS module wall (6) on the inner side of the enclosed area, and the surface of the EPS module wall (6) outside the enclosed area is sprayed and expanded in sequence A vitrified microbead layer (8), a bonding mortar layer (9), a crack-resistant mesh cloth (10), a plastering mortar layer (11) and an outer spray coating (12). 2. a kind of fast-constructed novel coal mine airtight wall and construction technique thereof according to claim 1, it is characterized in that: described EPS module body (13) is heated and foamed with expandable beads, by factory standardization production equipment A foamed plastic profile or component with a closed-cell structure obtained by one-time molding, the insulation boards (1301) on both sides have a thickness of 6cm, are connected by movable ribs (1303), and there is a gap of 13cm in the middle. 3. A kind of fast-constructed novel coal mine airtight wall and construction technique thereof according to claim 1, it is characterized in that: on the described EPS module body (13) component, the upper and lower sides are evenly distributed with sockets (1302), part of The components of the EPS module body (13) are provided with concave-convex buckles (1305) on the left and right sides, dovetail grooves (1304) evenly distributed on the inner and outer surfaces, and the reinforcement grooves (1306) are located on the movable rib (1303). 4. a kind of fast-constructed novel coal mine airtight wall and construction technique thereof according to claim 1, it is characterized in that: the longitudinal steel bar (14) and the transverse steel bar (15) in the described cross bar (5) pass through the thin steel wire The connection is fixed, and the lengths need to be extended to the roof (1), the bottom plate (2) and the two sides (3) of the roadway of the coal mine. 5. a kind of fast-constructed novel coal mine airtight wall and construction technique thereof according to claim 1, it is characterized in that: described EPS module wall body (6) every overlap three EPS module body (13) pouring concrete ( 16) Once. 6. A kind of fast-constructed novel coal mine airtight wall and construction technique thereof according to claim 1, characterized in that: the spraying thickness of the bonding mortar layer (9) is 0.5cm. 7. A kind of fast-constructed novel coal mine airtight wall and construction technique thereof according to claim 1, characterized in that: the spraying thickness of the plastering mortar layer (11) is 0.8cm.

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