CN115013057B - A new type of rapidly constructed coal mine closed wall and its construction technology - Google Patents

Abstract

The invention discloses a novel coal mine sealing wall which is quickly constructed and a construction process thereof. The novel coal mine sealing wall constructed rapidly is constructed according to the following process: firstly, cutting grooves with the depth of 30cm on a roadway top plate, a roadway bottom plate and two sides of a roadway, wherein a closed wall body is required to be arranged; secondly, inserting EPS module bodies with different specifications into reserved longitudinal steel bars, fixing the EPS module bodies through concave-convex buckles or socket joints, and then placing transverse steel bars in the steel bar clamping grooves to form crossed steel bars; furthermore, concrete is poured into the EPS module wall body; and finally, spraying an inner protective coating on the surface of the EPS module wall body at the inner side of the closed area, and sequentially spraying an expanded and vitrified micro bubble layer, an adhesive mortar layer, an anti-cracking grid cloth, a plastering mortar layer and an outer spraying layer on the surface of the EPS module wall body at the outer side of the closed area. The novel coal mine sealing wall constructed quickly has the advantages of firm structure, strong pressure resistance and good heat insulation performance.

Description

A new type of rapidly constructed coal mine closed wall and its construction technology

Technical field

The present invention relates to the technical field of temporary and permanent sealed walls in coal mines, specifically a new type of rapidly constructed coal mine sealed wall and its construction technology.

Background technique

Temporary and permanent sealing walls constructed underground in coal mines are the main ventilation structures in mines and important projects for sealing fire zones. At present, the temporary and permanent closed walls constructed underground in coal mines are mainly masonry structures and all-concrete structures. The construction period of closed walls of masonry and concrete structures is as long as one week. The required wall materials are heavy and difficult to transport. The construction process is complicated and workers work for a long time. The masonry and concrete structural walls are fully rigid structures with high strength. When the tunnel is under pressure, the wall is easily damaged and it is difficult to repair the wall. Coal mines are prone to dangerous situations such as lax sealing of the fire area and abnormal gas outflow.

Therefore, how to quickly and efficiently build temporary and permanent sealing walls with good stability underground in coal mines to ensure the safe production of coal mines; and how to save human, material and financial investment in coal mines has become an urgent problem for scientific researchers.

Contents of the invention

The present invention aims at the problems existing in the above-mentioned prior art such as long construction period, difficulty in material transportation, long working hours for workers, poor stability of the wall structure, and difficulty in repairing after damage, and provides a new type of rapidly constructed coal mine closed wall and its construction technology. .

The invention provides a new type of rapidly constructed coal mine closed wall and its construction technology, which includes a tunnel roof (1), a tunnel bottom plate (2), two gangways of the tunnel (3), a groove (4), a cross steel bar (5) and EPS. The module wall (6); the EPS module wall (6) on the inside of the enclosed area is sprayed with an inner protective coating (7) of high-density fireproof and flame-retardant polymer material; the EPS module wall on the outside of the enclosed area ( 6) The surface is sprayed in sequence with an expanded vitrified microbead layer (8), an adhesive mortar layer (9), an anti-crack mesh cloth (10), a plastering mortar layer (11) and an outer spray layer (12); as described A new type of rapidly constructed coal mine closed wall is constructed according to the following process:

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

The second stage: According to the cross-sectional shape of the tunnel where the closed wall is set up, insert EPS modules (13) of different types, specifications, and shapes into the reserved longitudinal steel bars (14), and use concave and convex buckles (1305) or sockets to (1302) is fixed, and then, the transverse steel bars (15) are placed in the steel bar slots (1306) to form cross steel bars (5);

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

The fourth stage: Spray the inner protective coating (7) of high-density fireproof and flame-retardant polymer material on the surface of the EPS module wall (6) inside the enclosed area, and spray and expand the surface of the EPS module wall (6) outside the enclosed area in sequence. Vitrified microbead layer (8), bonding mortar layer (9), anti-crack mesh cloth (10), plastering mortar layer (11) and external spray layer (12).

The EPS module body (13) is heated and foamed with expandable beads, and is a foam plastic profile or component with a closed cell structure that is formed in one step by factory standardized production equipment. The thickness of the insulation boards (1301) on both sides is 6cm. , connected through movable ribs (1303), with a 13cm gap in the middle.

The described EPS module body (13) component has sockets (1302) 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 steel bar slot (1306) is located on the movable floor plate (1303).

The longitudinal steel bars (14) and transverse steel bars (15) in the cross steel bars (5) are connected and fixed by thin steel wires, and their lengths need to extend to the coal mine tunnel roof (1), the tunnel bottom plate (2) and the two sides of the tunnel ( 3) Inside.

The EPS module wall (6) is poured with concrete (16) every time it overlaps three layers of EPS module bodies (13).

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

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

Beneficial effects of the present invention: The present invention provides a new type of rapidly constructed coal mine sealed wall and its construction technology, which breaks the original masonry and concrete sealed wall structure and proposes the use of EPS modules with lighter weight and lower cost. The simple construction technology of building blocks constructs a soft-hard-soft temporary or permanent EPS module wall. The temporary or permanent closed walls constructed by this technical solution have high stability, can effectively remove the destructive force of mine pressure, have excellent heat insulation and sealing performance, and save 200 yuan per square meter in cost compared to masonry structures; and the above-mentioned construction is adopted The technology can shorten the construction time of the airtight wall to one working shift (within 8 hours), which greatly saves the coal mine’s human, material and financial investment.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of a new type of rapidly constructed coal mine closed wall provided by the present invention.

Figure 2 is a cross-sectional view along line A-A in Figure 1

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

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

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

In the picture: 1-tunnel roof; 2-tunnel floor; 3-two sides of the tunnel; 4-grooves; 5-cross steel bars; 6-EPS module wall; 7-inner protective coating; 8-expanded vitrified microbeads layer; 9-bonding mortar layer; 10-anti-crack mesh cloth; 11-surface mortar layer; 12-external spray coating; 13-EPS module body; 1301-insulation panels on both sides; 1302-socket; 1303-movable Rib plate; 1304-dovetail groove; 1305-concave and convex buckle; 1306-reinforcement bar slot; 14-longitudinal steel bar; 15-transverse steel bar; 16-concrete.

Detailed ways

A specific implementation example of the present invention will be described in detail below with reference to the accompanying drawings:

As shown in Figures 1 to 5: a new type of rapidly constructed coal mine closed wall of the present invention and its construction technology, including a tunnel roof 1, a tunnel bottom plate 2, two gangways of the tunnel 3, a groove 4, a cross steel bar 5 and EPS Modular wall 6. The surface of the EPS module wall 6 inside the enclosed area is sprayed with an inner protective coating 7 of high-density fireproof and flame-retardant polymer material; the surface of the EPS module wall 6 outside the enclosed area is sprayed with a layer of expanded vitrified microbeads in sequence. 8. Bonding mortar layer 9, anti-crack mesh cloth 10, plastering mortar layer 11 and exterior spray layer 12;

In the specific implementation example of the present invention, the EPS module body 13 components have sockets 1302 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 1304 on the inner and outer surfaces. The steel bar clips The groove 1306 is located on the movable floor 1303; the longitudinal steel bars 14 and the transverse steel bars 15 in the cross steel bars 5 are connected and fixed by thin steel wires, and their lengths need to extend to the coal mine tunnel roof 1, the tunnel bottom plate 2 and the tunnel two sides 3; EPS module Concrete 16 is poured once for every three overlapping layers of EPS modules 13 of the wall 6; the spraying thickness of the bonding mortar layer 9 is 0.5cm; the spraying thickness of the plastering mortar layer 11 is 0.8cm.

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

The first stage: dig grooves 4 with a depth of 30cm in the tunnel roof 1, tunnel floor 2 and tunnel sides 3 where airtight walls need to be installed;

The second stage: According to the cross-sectional shape of the tunnel where the airtight wall is set up, insert EPS module bodies 13 of different types, specifications and shapes into the reserved longitudinal steel bars 14, and fix them through concave and convex buckles 1305 or sockets 1302, and then, Transverse steel bars 15 are placed in the steel bar slots 1306 to form cross steel bars 5;

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

The fourth stage: Spray the inner protective coating 7 of high-density fireproof and flame-retardant polymer material on the surface of the EPS module wall 6 inside 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 (4)

1. The construction process of the novel coal mine sealing wall which is quickly constructed is characterized in that the novel coal mine sealing wall which is quickly constructed comprises a roadway top plate (1), a roadway bottom plate (2), two sides (3) of a roadway, a groove (4), cross steel bars (5) and an EPS module wall body (6); an inner protective coating (7) of high-density fireproof flame-retardant high polymer material is sprayed on the surface of the EPS module wall (6) at the inner side of the closed area; the surface of the EPS module wall body (6) at the outer side of the closed area is sequentially sprayed with an expanded and vitrified micro bubble layer (8), an adhesive mortar layer (9), an anti-cracking mesh cloth (10), a plastering mortar layer (11) and an outer spraying layer (12), two side heat insulation plates (1301) of the EPS module body (13) are connected through movable rib plates (1303), the two side heat insulation plates (1301) are all a whole panel, and the EPS module wall body (6) is a row of EPS module bodies (13) formed by overlapping the EPS module bodies (13) from bottom to top; the novel coal mine sealing wall constructed rapidly is constructed according to the following process:

the first stage: cutting grooves (4) with the depth of 30cm on a roadway top plate (1), a roadway bottom plate (2) and roadway two sides (3) of a closed wall body to be arranged;

and a second stage: according to the section shape of a roadway at a closed wall, EPS module bodies (13) of different types, different specifications and different shapes are inserted into reserved longitudinal steel bars (14), the EPS module bodies (13) are fixed through concave-convex buckles (1305) or splicing sockets (1302), then transverse steel bars (15) are placed in steel bar clamping grooves (1306) to form cross steel bars (5), the longitudinal steel bars (14) and the transverse steel bars (15) in the cross steel bars (5) are connected and fixed through thin steel wires, the lengths of the longitudinal steel bars and the transverse steel bars are required to extend into a coal mine roadway top plate (1), a roadway bottom plate (2) and roadway two sides (3), splicing sockets (1302) are uniformly distributed on the upper side and the lower side of each EPS module body (13), concave-convex buckles (1305) are arranged on the left side and the right side of each EPS module body, dovetail grooves (1304) are uniformly distributed on the inner surface and the outer surface of each EPS module body (13), and the steel bar clamping grooves (1306) are positioned on movable rib plates (1303).

And a third stage: in the formed single-row EPS module wall body (6), pouring concrete (16) to form a firm wall body in a soft-hard-soft mode, wherein the EPS module wall body (6) is poured with the concrete (16) once for each lap joint of three layers of EPS module bodies (13);

fourth stage: the inner protective coating (7) of high-density fireproof flame-retardant polymer material is sprayed on the surface of the EPS module wall body (6) at the inner side of the closed area, and the expanded and vitrified microbead layer (8), the bonding mortar layer (9), the anti-cracking mesh cloth (10), the plastering mortar layer (11) and the outer spraying layer (12) are sprayed on the surface of the EPS module wall body (6) at the outer side of the closed area in sequence.

2. The construction process of the novel coal mine sealing wall constructed quickly according to claim 1, which is characterized in that: the EPS module body (13) is heated and foamed by using expandable beads, and foam plastic section bars or components with closed pore structures are manufactured through one-step molding of factory standardized production equipment, wherein the thickness of heat insulation plates (1301) at two sides is 6cm, and a gap of 13cm is formed in the middle.

3. The construction process of the novel coal mine sealing wall constructed quickly according to claim 1, which is characterized in that: the spraying thickness of the bonding mortar layer (9) is 0.5cm.

4. The construction process of the novel coal mine sealing wall constructed quickly according to claim 1, which is characterized in that: the spraying thickness of the plastering mortar layer (11) is 0.8cm.