CN112124858A - Waste coal mine corridor reinforcing method - Google Patents
Waste coal mine corridor reinforcing method Download PDFInfo
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- CN112124858A CN112124858A CN202011001326.8A CN202011001326A CN112124858A CN 112124858 A CN112124858 A CN 112124858A CN 202011001326 A CN202011001326 A CN 202011001326A CN 112124858 A CN112124858 A CN 112124858A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
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Abstract
The method for reinforcing the waste coal mine corridor is designed for the safety protection of the coal mine corridor and belongs to the field of coal mine facility safety; according to the scheme, the longitudinal beams of the vestibule and the top beams of the support of the vestibule are reinforced by adopting the fiber reinforcing layer and the fiber protective layer; reinforcing the transverse beam of the corridor by adopting a metal reinforcing layer and a reinforcing protective layer; reinforcing the vertical columns of the vestibule support by adopting a vestibule support column hoop, lacing bars and a vestibule support column hoop protective layer; the invention has the advantages that the corridor upright post is protected from being invaded by corrosive substances in the nature for a long time, and the shape and the appearance are not changed.
Description
Technical Field
The invention discloses a method for reinforcing a waste coal mine corridor, which is designed for the safety reinforcement of the coal mine corridor and belongs to the field of coal mine facility safety.
Background
The gallery is a carrier of the belt conveyor, and is a special facility arranged for continuously conveying materials such as coal, ore and the like by the belt conveyor, and after the mined coal is conveyed to the ground by the main well facility, the gallery and a transfer station are generally adopted to connect transmission systems of the belt conveyors, so that the coal is conveyed to a coal bunker or a coal washing yard; the corridor consists of a long corridor, a corridor support and a belt conveyor (figure 2), transfer stations (figure 3) are arranged at two ends of the corridor, and a force transmission system of the corridor structure is that a load acting on the belt conveyor is transmitted to the ground of the corridor and a transverse beam of the corridor through the belt conveyor support, the transverse beam of the corridor transmits the load to the corridor support through a longitudinal beam of the corridor, and the load is transmitted to the ground through a vertical column of the corridor support; the main components of the force transfer system of the vestibule and the vestibule support are a vestibule support upright post, a vestibule support top beam and a vestibule longitudinal beam, when the vestibule transfers coal, the vestibule transverse beam is also a key component for transferring force, but when the vestibule does not transfer coal any more, the load of the vestibule transverse beam is much smaller, so that the vestibule of the waste coal mine is reinforced, the vestibule support upright post, the vestibule support top beam, the vestibule longitudinal beam and the vestibule transverse beam are reinforced differently, the safety of the vestibule can be ensured, the rest of the components are not considered for maintenance, and the components are repaired when problems occur; the waste coal mine corridor reinforcing method provided by the invention can solve the problems.
Disclosure of Invention
The method for reinforcing the corridor of the waste coal mine shown in the figures 2 and 3 is as shown in figure 1, and the method for reinforcing the corridor of the waste coal mine mainly comprises the steps of reinforcing a longitudinal beam and a top beam of a support of the corridor, reinforcing a transverse beam 22 of the corridor and reinforcing an upright post of the support of the corridor.
The reinforcement device for the longitudinal beam of the corridor and the top beam of the support of the corridor is composed of a fiber reinforcement layer and a fiber protection layer; the fiber reinforcing layer is a reinforcing layer adhered to the surface of the top beam bottom of the longitudinal beam of the vestibule or the top beam bottom of the support of the vestibule and comprises a fiber layer adhered longitudinally and reinforcing plates which are arranged on the bottom surface and the side surface of the longitudinal beam of the vestibule or the top beam bottom of the top beam of the support of the vestibule at intervals and vertically; preferentially recommending that the fiber reinforced layer is carried out by adopting a method of sticking carbon fibers; the fiber protective layer is carried out by adopting a method of compacting and reinforcing carbon fiber plates at intervals; the reinforcing method comprises the following steps: cleaning the surfaces of the longitudinal beams of the vestibule or the top beams of the support of the vestibule respectively, and sticking carbon fibers to the bottoms of the longitudinal beams of the vestibule or the top beams of the support of the vestibule to form fiber reinforced layers; then, battens made of fiber boards are pressed on the surface of the fiber reinforced layer at intervals, the intersection of the longitudinal beams of the corridor or the top beams of the support of the corridor and other components is broken, a closed loop is not formed at the intersection of the longitudinal beams of the corridor or the top beams of the support of the corridor and other components, and the direction of the closed loop is vertical to the fiber arrangement direction of the fiber reinforced layer; a layer of carbon fiber cloth with the same width as the laths is adhered to the surfaces of all the laths along the closed loop direction of the laths, and the laths and the layer of carbon fiber cloth form a fiber reinforcing layer together; the fiber reinforcing layer is respectively fixedly connected to the surface of the longitudinal beam of the vestibule or the top beam of the support of the vestibule, and then a fiber protective layer is applied; the fiber protection layer consists of a filling layer, an interface layer and an outer cladding layer, wherein the filling layer is a layer surface which is lower than the outer surface of the reinforcement plate and is used for filling the surface of the longitudinal beam of the vestibule between the reinforcement plates or the top beam of the vestibule support; the interface layer is the outer surface of the reinforcing plate and the layer surface of the outer surface of the interface layer combined with the outer cladding; the outer cladding is the outer surface of the reinforced vestibule longitudinal beam or the top beam of the vestibule support.
The reinforcing facility for the transverse beam of the corridor consists of a metal reinforcing layer and a reinforcing protective layer; preferably, angle steel is adopted to manufacture the corner protector, and a steel belt is used to manufacture the connecting plate; the metal reinforcing layer consists of metal angle protectors and braces and is used for reinforcing the transverse beams of the vestibule; the metal angle bead is a part for reinforcing the exposed beam angle of the transverse beam of the gallery, and is fixedly connected with the end parts of the braces which are vertically intersected at intervals after being tightly attached to the exposed beam angle of the transverse beam of the gallery; the brace is a strip-shaped part which is vertically intersected with the metal corner protector and is arranged at intervals, is glued with two sides and is vertically provided with an anchoring nail to be connected with the beam body; the reinforcing protective layer consists of a filling layer, an interface layer and an outer cladding layer, wherein the filling layer is a layer surface which is lower than the outer surface of the metal reinforcing layer and is filled on the surface of the transverse beam of the corridor between the metal reinforcing layers; the interface layer is a layer surface formed by combining the outer surface of the metal reinforcing layer and the outer surface of the section layer with the outer cladding layer; the outer cladding is the outer surface of the reinforced gallery transverse beam; the reinforcing method comprises the following steps: pasting angle steels at exposed edge parts of the transverse beams of the corridor in a long way, pasting connecting plates at intervals vertically, welding the end parts of the connecting plates and the edges of the protective angles into a whole, anchoring the connecting plates on the surfaces of the transverse beams of the corridor, and constructing a reinforcing protective layer on the surfaces; the reinforcing protective layer consists of a filling layer, an interface layer and an outer cladding layer, wherein the filling layer is a layer surface which is lower than the outer surfaces of the corner protector and the connecting plate and is used for filling the surface of the transverse beam of the corridor between the corner protector and the connecting plate; the interface layer is a layer surface combining the outer surfaces of the corner protector and the connecting plate and the outer surface of the cross section layer with the outer cladding layer; the outer cladding is the outer surface of the reinforced gallery transverse beam.
The reinforcement facility for the vertical column of the vestibule support consists of a vestibule support column hoop, batten strips and a vestibule support column hoop protective layer, and preferably adopts steel plates to manufacture the vestibule support column hoop, steel strips to manufacture the batten strips and cement mortar to manufacture the vestibule support column hoop protective layer; the vestibule support column hoops are arranged outside the vestibule support columns and tightly cling to the vestibule support columns, the vestibule support column hoops are connected into a whole through lacing bars, and a vestibule support column hoop protective layer covers the outside of the vestibule support column hoops and the lacing bars; the specific method comprises the following steps: cleaning the surface of the gallery support stand column, arranging gallery support column hoops on the surface of the gallery support stand column at intervals, connecting adjacent gallery support column hoops by batten strips, and filling gaps between the gallery support column hoops and the batten strips on the surface of the gallery support stand column to enable the surface to be flat and not smooth; the outer surface construction vestibule support column hoop protective layer of filling layer and vestibule support column hoop and lacing bar makes the surface of vestibule support column hoop protective layer smooth, level and smooth.
The invention has the advantages that the corridor upright post is protected from being invaded by corrosive substances in the nature for a long time, and the shape and the appearance are not changed.
Description of the drawings:
FIG. 1 is a schematic diagram of reinforcement of a coal mine corridor.
FIG. 2 is a schematic illustration of a raw coal mine vestibule.
FIG. 3 a schematic illustration of a raw coal mine vestibule and reinforcement.
In the figure: 1-reinforcement facilities; 11-vestibule support hoops; 12-lacing bar; 13-corridor support column hoop protective layer; 14-a fibrous reinforcement layer; 15-a protective layer of fibres; 16-a metal reinforcement layer; 17-reinforcing the protective layer; 2-original facilities of the coal mine corridor; 21-vestibule longitudinal beam; 22-vestibule transverse beam; 23-corridor ground; 24-vestibule walls; 25-vestibule roof; 26-a belt conveyor; 27-vestibule support posts; 28-vestibule support top beam; 29-gallery support straining beam.
Detailed Description
Examples
In order to reinforce and reform a certain abandoned coal mine into a historical cultural education base, a popular science base and a tourist attraction, the corridor of the abandoned coal mine shown in figures 2 and 3 is reinforced by the method shown in figure 1, and the method for reinforcing the corridor of the abandoned coal mine mainly comprises the steps of reinforcing a longitudinal beam 21 and a top beam 28 of a corridor support, reinforcing a transverse beam 22 of the corridor and reinforcing an upright column 27 of the corridor support, wherein the longitudinal beam 21 and the top beam 28 of the corridor support are made of cast-in-place reinforced concrete; the whole length of the corridor is 155 meters, the span between two transfer stations is 150 meters, the bottoms of the corridor are arranged at equal intervals between 9 pieces, the corridor between two transfer operations is arranged from a starting point to a terminal point from low to high, the elevation of the lowest point of the bottom of the longitudinal beam 21 of the corridor is 4.0 meters, and the elevation of the highest point of the bottom of the longitudinal beam 21 of the corridor is 31.331 meters; the beam height of the longitudinal beam 21 of the vestibule is 500 mm, and the beam width is 400 mm; the length of the vestibule transverse beam 22 is 3.2 meters, the height is 300 millimeters, and the width is 200 millimeters; the length of the vestibule support top beam 28 is 5.0 meters, the height is 500 millimeters, and the width is 400 millimeters; each side of the cross section of the vestibule support column 27 is 400 mm in length and unequal in height, the shortest vestibule support column 27 is 4.293 meters in height, and the highest vestibule support column 27 is 26.37 meters in length.
The reinforcing device for the longitudinal beams 21 of the vestibule and the top beams 28 of the support of the vestibule is composed of a fiber reinforcing layer 14 and a fiber protective layer 15; the fiber reinforcing layer 14 is a reinforcing layer adhered to the surface of the bottom of the gallery longitudinal beam 21 or the gallery support top beam 28 and comprises a fiber layer adhered longitudinally and reinforcing plates which are arranged on the bottom surface and the side surface of the gallery longitudinal beam 21 or the gallery support top beam 28 at intervals and vertically; manufacturing the fiber reinforcing layer 14 by adopting carbon fiber cloth with the width of 400 mm, and sticking carbon fibers by using glue; the carbon fiber processing bonding glue consists of primer glue, leveling glue and impregnating glue, and the primer glue has low viscosity and strong permeability, can better permeate into gaps on the surface of concrete and has strong binding force with the concrete; the leveling glue has good thixotropy, no flowing, convenient operation and high strength; the impregnating adhesive has moderate viscosity, is easy to brush, has good wettability to carbon fibers, high strength and moderate curing speed; the reinforcing plate adopts carbon fiber cloth with the width of 100 mm to perform compaction and reinforcement on the fiber reinforcing layer according to a compaction and reinforcement method in a manner similar to a column hoop with the interval of 300 mm in the vertical direction of the fiber reinforcing layer 14; the reinforcing method comprises the following steps: respectively cleaning the surfaces of the longitudinal beams 21 of the vestibule or the top beams 28 of the vestibule supports, adhering the fiber reinforced layer 14 to the bottom of the longitudinal beams 21 of the vestibule or the top beams 28 of the vestibule supports, wherein the length of the carbon fiber cloth adhered each time is 2.5-3.5 meters, and the lap joint length when the carbon fiber cloth is longitudinally paved along the longitudinal beams 21 of the vestibule or the top beams 28 of the vestibule supports is 200 millimeters; vertically sticking the pressing strips made of fiber cloth with the width of 100 mm at intervals of 300 mm, pressing the pressing strips on the surface of the fiber reinforcing layer, sticking 300 mm reinforcing plates at the bottom of the crossed parts at the crossed parts of the longitudinal beams 21 of the vestibule or the top beams 28 of the vestibule supports and other parts, wherein the longitudinal beams 21 of the vestibule or the top beams 28 of the vestibule supports and the reinforcing plates at the crossed parts of other parts do not form a closed loop, and the lap joint length is 200 mm; the fiber reinforcing layer 14 is respectively fixedly connected to the surface of the longitudinal beam 21 of the vestibule or the top beam 28 of the support of the vestibule, and then the fiber protective layer 15 is applied; the fiber protective layer 15 consists of a filling layer, an interface layer and an outer cladding layer, wherein the filling layer is made of putty and is a layer surface which is lower than the outer surface of the reinforcing plate and is used for filling the surface of the gallery longitudinal beam 21 or the gallery support top beam 28 between the reinforcing plates; the interface layer is the outer surface of the reinforcing plate and the layer surface of the outer surface of the interface layer combined with the outer cladding; the outer cladding is the outer surface of the reinforced vestibule longitudinal beam 21 or the vestibule support top beam 28 and is made of high-strength polymer mortar, and the thickness of the outer cladding is 15-20 mm.
The reinforcing facility for the transverse beam 22 of the corridor is composed of a metal reinforcing layer 16 and a reinforcing protective layer 17; the metal reinforcing layer 16 consists of metal angle beads and braces and is used for reinforcing the transverse beams 22 of the vestibule; preferentially, 45-degree angle steel is recommended to be used for manufacturing the corner protector, and a steel belt with the width of 30 mm and the thickness of 2-3 mm is used for manufacturing the connecting plate; the metal angle bead is a part for reinforcing the exposed beam angle of the transverse beam 22 of the vestibule in a through length manner, is tightly attached to the exposed beam angle of the transverse beam 22 of the vestibule and then is solidified with the end parts of the braces which are vertically crossed at intervals, and the specific method comprises the following steps: respectively coating the uniformly stirred glue on the processed concrete and angle steel bonding surfaces, wherein the middle part is thick, the edge is thin, and then bonding the steel plate at a preset position; after the steel plates are bonded, the steel plates are immediately supported by using a fixture, fixed by using tools such as bolts and the like, and properly pressurized so that the glue is just extruded from the edges of the steel plates to the degree; the operable time of the glue after the first component glue and the second component glue are mixed at normal temperature is 30-45 minutes; the glue can be cured within 24 hours at 25 ℃, the pressurizing and fixing device is removed, the glue can be used after being stressed after three days, and the curing time is correspondingly prolonged when the temperature is lower than 25 ℃; the lowest use temperature of the adhesive is 5 ℃, and if the lowest use temperature is lower than the minimum use temperature, necessary temperature rise measures are adopted; the brace is a strip-shaped component which is vertically intersected with the metal corner protector and is arranged at intervals, and the anchor nails are glued and vertically arranged to be connected with the beam body; the reinforcing protective layer 17 consists of a filling layer, an interface layer and an outer cladding layer, wherein the filling layer is a layer surface which is lower than the outer surface of the metal reinforcing layer 16 and is filled on the surface of the gallery transverse beam 22 between the metal reinforcing layers 16; the interface layer is a layer surface formed by combining the outer surface of the metal reinforcing layer 16 and the outer surface of the cross section layer with the outer cladding layer; the outer cladding is the outer surface of the reinforced vestibule transverse beam 22; the reinforcing method comprises the following steps: pasting angle steels at the exposed edge parts of the transverse beams 22 of the corridor in a full-length mode, pasting connecting plates at intervals vertically, welding the end parts of the connecting plates and the edges of the protective angles into a whole, anchoring the connecting plates on the surfaces of the transverse beams 22 of the corridor, and constructing a reinforcing protective layer 17 on the surfaces; the reinforcing protective layer 17 consists of a filling layer, an interface layer and an outer cladding layer, wherein the filling layer is constructed by a putty coating method and is a layer surface which is lower than the outer surfaces of the corner protector and the connecting plate and is used for filling the surface of the gallery transverse beam 22 between the corner protector and the connecting plate; the interface layer is a layer surface combining the outer surfaces of the corner protector and the connecting plate and the outer surface of the cross section layer with the outer cladding layer; the outer cladding is made of polyester mortar and has an outer surface with a thickness of 15-20 mm.
The reinforcing facility for the gallery support upright posts 27 consists of a gallery support column hoop 11, batten strips 12 and a gallery support column hoop protective layer 13, and preferentially recommends that steel plates with the length of 400 mm, the width of 200 mm and the thickness of 3 mm are used for manufacturing the gallery support column hoop 11, steel strips with the width of 30 mm and the thickness of 3 mm are used for manufacturing the batten strips 12, and cement mortar with the thickness of 15-20 is used for manufacturing the gallery support column hoop protective layer 13; the vestibule support column hoops 11 are arranged on the outside of the vestibule support columns 27 at intervals of about 300 mm, the vestibule support column hoops 11 are tightly attached to the vestibule support columns 27, the vestibule support column hoops 11 are connected into a closed-loop whole through lacing bars 12 in a welding mode, when the vestibule support column hoops 11 and the lacing bars 12 do not form a closed loop, anchoring nails are additionally arranged to anchor the vestibule support column hoops 11 and the lacing bars 12 on the vestibule support columns 27, anchoring methods are that holes with the diameter of 3 mm are drilled at 10 mm away from the edges of the vestibule support column hoops 11 and the lacing bars 12 at corresponding positions on the vestibule support column 11, the lacing bars 12 and corresponding positions on the vestibule support column 27 are drilled with the diameter of 10 mm and the depth of 20-30 mm, wood chips are drilled in the holes of the vestibule support column 27, the vestibule support column hoops 11 and the lacing bars 12 are bonded through glue, and then the vestibule support column hoops 11 and the lacing bars are connected through wood screws, The lacing bars 12 are fixed on the gallery support upright posts 27; covering a vestibule bracket column hoop protective layer 13 outside the vestibule bracket column hoop 11 and the lacing bar 12; the specific method comprises the following steps: cleaning the surface of the vestibule support upright post 27, arranging the vestibule support column hoops 11 on the surface of the vestibule support upright post 27 at intervals, connecting the adjacent vestibule support column hoops 11 by the lacing bars 12, filling the gap on the surface of the vestibule support upright post 27 between the vestibule support column hoops 11 and the lacing bars 12 by a putty scraping method, and enabling the surface of the vestibule support upright post 27 to be smooth; and (3) constructing a vestibule support column hoop protective layer 13 on the outer surfaces of the filling layer, the vestibule support column hoops 11 and the lacing strips 12 by using cement mortar with the thickness of about 20 millimeters, so that the surface of the vestibule support column hoop protective layer 13 is smooth and flat.
Claims (8)
1. A method for reinforcing a waste coal mine corridor is characterized by mainly comprising the steps of reinforcing a longitudinal beam (21) of the corridor and a top beam (28) of a corridor support, reinforcing a transverse beam (22) of the corridor and reinforcing an upright column (27) of the corridor support; the reinforcing facilities for the longitudinal beams (21) of the vestibule and the top beams (28) of the support of the vestibule are composed of fiber reinforcing layers (14) and fiber protective layers (15); the reinforcing method comprises the following steps: cleaning the surfaces of the longitudinal beams (21) of the vestibule and the top beams (28) of the vestibule supports respectively, solidifying a fiber reinforcing layer (14) on the surfaces of the longitudinal beams (21) of the vestibule and the top beams (28) of the vestibule supports respectively, and applying a fiber protective layer (15); the reinforcing facility for the transverse beam (22) of the corridor consists of a metal reinforcing layer (16) and a reinforcing protective layer (17); the reinforcing method comprises the following steps: a protection device is fixedly connected with the exposed edge part of the transverse beam (22) of the corridor, and a reinforcing protection layer (17) is constructed on the surface; the reinforcement facility for the vestibule support upright post (27) is composed of a vestibule support column hoop (11), a lacing bar (12) and a vestibule support column hoop protective layer (13), the vestibule support column hoop (11) is arranged outside the vestibule support upright post (27) and clings to the vestibule support upright post (27), the vestibule support column hoops (11) are connected into a whole through the lacing bar (12), and the vestibule support column hoop protective layer (13) is covered outside the vestibule support column hoop (11) and the lacing bar (12); the specific method comprises the following steps: cleaning the surface of a vestibule support upright post (27), arranging vestibule support column hoops (11) on the surface of the vestibule support upright post (27) at intervals, connecting adjacent vestibule support column hoops (11) by using lacing bars (12), and filling gaps on the surface of the vestibule support upright post (27) between the vestibule support column hoops (11) and the lacing bars (12) to ensure that the surface is smooth; and constructing a vestibule support column hoop protective layer (13) on the outer surfaces of the filling layer, the vestibule support column hoop (11) and the lacing bars (12), so that the surface of the vestibule support column hoop protective layer (13) is smooth and flat.
2. The method for reinforcing the abandoned coal mine corridor according to claim 1, wherein the corridor support hoops (11) are square frames made of 4 rectangular plates and arranged at intervals around the cross section of the corridor support upright post (27), the corridor support hoops (11) are closely attached to the surface of the corridor support upright post (27), and the corridor support hoops (11) are connected into a whole by using lacing bars (12).
3. The method for reinforcing the vestibule of a abandoned coal mine according to claim 1, characterized in that the lacing bars (12) are rectangular strips with the length equal to the spacing distance of the vestibule support hoops (11), the lacing bars (12) are arranged perpendicular to the vestibule support hoops (11), and the end portions of the lacing bars (12) are fixedly connected with the edge of the vestibule support hoops (11).
4. The method for reinforcing the abandoned coal mine corridor according to claim 1, wherein the corridor support hoop protection layer (13) is composed of a filling layer, an interface layer and an outer cladding layer, wherein the filling layer is a layer which fills the surface of a corridor support upright post (27) between the corridor support hoop (11) and a batten strip (12) and is lower than the outer surfaces of the corridor support hoop (11) and the batten strip (12); the interface layer is a layer surface formed by combining the outer surfaces of the vestibule bracket column hoop (11) and the lacing bar (12) and the outer surface of the cross section layer with the outer cladding layer; the outer cladding is the outer surface of the reinforced vestibule bracket post (27).
5. The waste coal mine corridor reinforcing method as claimed in claim 1, wherein the fiber reinforcing layer (14) is a reinforcing layer adhered to the surface of the bottom of the longitudinal beam (21) of the corridor or the top beam (28) of the corridor support, and comprises a fiber layer adhered longitudinally and reinforcing plates which are arranged on the exposed bottom surface and side surface of the bottom of the longitudinal beam (21) of the corridor or the top beam (28) of the corridor support at intervals and are perpendicular to the fiber layer.
6. The reinforcement method for the abandoned coal mine corridor according to the claim 1, wherein the fiber protection layer (15) is composed of a filling layer, an interface layer and an outer cladding layer, the filling layer is a layer which is lower than the outer surface of the reinforcement plate and is used for filling the surface of the longitudinal beam (21) of the corridor between the reinforcement plates or the top beam (28) of the corridor support; the interface layer is the outer surface of the reinforcing plate and the layer surface of the outer surface of the interface layer combined with the outer cladding; the outer cladding is the outer surface of the reinforced vestibule longitudinal beam (21) or the vestibule support top beam (28).
7. The method for reinforcing a waste coal mine corridor according to claim 1, wherein the metal reinforcing layer (16) is composed of metal angle beads and braces and is used for reinforcing the transverse beams (22) of the corridor; the metal angle bead is a part for reinforcing the exposed beam angle of the transverse beam (22) of the vestibule, and is fixedly connected with the end parts of the braces which are vertically crossed at intervals after being tightly attached to the exposed beam angle of the transverse beam (22) of the vestibule; the brace is a strip-shaped part which is vertically crossed with the metal corner protector and has unknown intervals, is cemented with two surfaces and is vertically provided with an anchoring nail for deep connection with the beam.
8. The reinforcement method for the abandoned coal mine corridor according to claim 1, wherein the reinforcement protection layer (17) is composed of a filling layer, an interface layer and an outer cladding layer, wherein the filling layer is a layer which is lower than the outer surface of the metal reinforcement layer (16) and fills the surface of the corridor transverse beam (22) between the metal reinforcement layers (16); the interface layer is a layer surface formed by combining the outer surface of the metal reinforcing layer (16) and the outer surface of the cross section layer with the outer cladding layer; the surround is the outer surface of the reinforced vestibule transverse beam (22).
Priority Applications (1)
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|---|---|---|---|
| CN202011001326.8A CN112124858A (en) | 2020-09-22 | 2020-09-22 | Waste coal mine corridor reinforcing method |
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| CN202011001326.8A CN112124858A (en) | 2020-09-22 | 2020-09-22 | Waste coal mine corridor reinforcing method |
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2020
- 2020-09-22 CN CN202011001326.8A patent/CN112124858A/en active Pending
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Application publication date: 20201225 |
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