Carbon fiber reinforced coal mine underground supporting false roof net and supporting system

Abstract

The utility model relates to the technical field of coal mine underground support, in particular to a carbon fiber reinforced coal mine underground support false roof net and a support system, which comprise a plurality of warp-wise fiber bundles and a plurality of weft-wise fiber bundles, the warp-wise fiber bundles and the weft-wise fiber bundles are arranged in a crossed manner to form a crossed overlap, and the warp-wise fiber bundles and the weft-wise fiber bundles are arranged in a staggered manner. The same warp-wise fiber bundle and the same weft-wise fiber bundle are bound and fixed at the overlapped part through the same binding fiber; the warp-wise fiber bundles and the weft-wise fiber bundles are arranged in parallel, embedded pressing pieces are arranged at the overlapped positions of the warp-wise fiber bundles and the weft-wise fiber bundles, the embedded pressing pieces are arranged on the outer sides of the binding fibers respectively and embedded into the warp-wise fiber bundles and / or the weft-wise fiber bundles in a relatively matched mode, and by means of the structure, all parts of the supporting false roof net can be effectively and tightly connected together; a more stable overall structure is formed, external pressure and tension can be better resisted, and the shear resistance and deformation resistance of the supporting false roof net are improved. The problem that in the prior art, a polyester fiber supporting false roof net is poor in tensile resistance and shearing resistance is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mine underground support technical field, concretely is a kind of carbon fiber reinforced coal mine underground support false roof net and support system. BACKGROUND

[0002] Coal mine underground support is an important link to ensure safety in production, and the coal mine underground support false roof net can improve the speed and working efficiency when being used as roof support material in the coal mine fully mechanized working face withdrawal, and can also provide necessary support in the process of roadway excavation or be used as artificial false roof and other materials.

[0003] The support false roof net is a support material specially designed for underground engineering such as coal mine, mainly used for false roof and rib protection in the process of coal seam slicing in coal mine underground, to provide necessary support for mining work. At the same time, it can also be used as a support material for various roadways, such as anchor rod roadway, support roadway and anchor spray roadway, effectively resisting the pressure of surrounding rock of the roadway, maintaining the stability of the roadway and preventing the occurrence of roadway collapse and roof fall accidents. In addition, the support false roof net can also be used in the fields of tunnel engineering, highway slope protection, building anti-seismic reinforcement, foundation and component anchoring and other engineering fields. At present, the existing technology usually uses metal net, plastic net and polyester fiber net when the coal mine fully mechanized working face is withdrawn. The metal net is connected by several steel bars through spot welding, and the overall performance is not good, stress concentration is easy to occur at the welding point, and the force is uneven, which is easy to collapse under the huge ground pressure. In addition, the humidity in the mine is high and there are many acidic substances. In such an environment, rusting and aging may occur, and the performance will be seriously reduced, which will bring great accident hazards to the safety of coal production. The rigidity and strength of the plastic net during use are not ideal, and it may not be able to withstand a large pressure or deformation. Compared with the metal net, the plastic net has relatively weak shear resistance, which may affect the supporting effect, and in addition, the plastic net has too large elongation, which is easy to form a net bag in the process of mining, affecting the stability of the supporting structure. The polyester fiber net commonly used on the market is made of high-strength, high-modulus and low-creep polymeric filament fibers, which are bundled and woven into a matrix, and a layer of flame-retardant and static-conductive coating is coated on the surface. It has the characteristics of acid and alkali resistance, aging resistance and low cost, but the shear resistance of the polyester fiber net is not strong enough, which may not be able to play its performance in some application scenarios that need to withstand shear force, affecting the stability of the supporting structure. CONTENT OF THE UTILITY MODEL

[0004] In view of the poor tensile and shear resistance of the polyester fiber support false roof net in the prior art, the utility model provides a carbon fiber reinforced coal mine underground support false roof net and support system.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a kind of carbon fiber reinforced support false roof net for coal mine underground, including several warp fiber bundles and several weft fiber bundles, several warp fiber bundles and several weft fiber bundles cross arrangement, form cross-overlapping, and same warp fiber bundle and weft fiber bundle are fixed by same binding fiber at overlapping place;Warp fiber bundle and weft fiber bundle are provided with embedded compression sheet at overlapping place, the embedded compression sheet is separately arranged on the outside of binding fiber, and relatively matched and embedded into warp fiber bundle and / or weft fiber bundle.

[0007] Optionally, the warp fiber bundle includes several warp polyester fibers and several warp carbon fibers; the weft fiber bundle includes several weft polyester fibers and several weft carbon fibers.

[0008] Optionally, the surface of the warp fiber bundle and the weft fiber bundle is covered with a flame-retardant antistatic high-molecular polymer chemical colloid layer.

[0009] Optionally, the embedded compression sheet is provided with several connecting holes.

[0010] Optionally, the embedded compression sheet is further provided with a fixed connecting piece, the fixed connecting piece sequentially passes through the connecting holes on the embedded compression sheets relatively matched and embedded into the warp fiber bundle and / or the weft fiber bundle, to compressively fix the warp fiber bundle and the weft fiber bundle.

[0011] Optionally, the embedded compression sheet is provided with several anchoring spikes on the inside, the anchoring spikes are embedded into the warp fiber bundle and / or the weft fiber bundle.

[0012] Optionally, the anchoring spike includes a cylinder and several anchor spikes, the anchor spikes are arranged along the axial direction of the cylinder, and the anchor spikes are in the structure of arrowhead.

[0013] Optionally, the edge of the embedded compression sheet is provided with a cutting-resistant flexible edge.

[0014] Optionally, the cutting-resistant flexible edge is a polyurethane-coated fiber cutting-resistant flexible edge.

[0015] The utility model further provides a support system, including the above-mentioned carbon fiber reinforced support false roof net for coal mine underground.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model discloses a carbon fiber reinforced support false roof net for underground coal mine. Including a plurality of warp fiber bundles and a plurality of weft fiber bundles, the warp fiber bundles and a plurality of weft fiber bundles cross arrangement, form cross -over, and same warp fiber bundle and weft fiber bundle are fixed in the overlapping place through same bundle fiber binding, the warp fiber bundle and weft fiber bundle are provided with embedded compression sheet at the overlapping place, the embedded compression sheet is divided and is arranged at the outside of bundle fiber, and relatively matched embedding is to warp fiber bundle and / or weft fiber bundle. Wherein, the weft fiber bundle and warp fiber bundle of cross -over structure can ensure that false roof net has higher strength and tenacity in each direction, effectively resists the pressure from different directions, and the setting of bundle fiber can enhance the connecting strength between fiber bundles, so that the whole false roof net is not easy to loosen, finally, through setting embedded compression sheet at the overlapping place of warp fiber bundle and weft fiber bundle, the close combination between fiber bundles can be further enhanced, not only can improve the overall stability and carrying capacity of false roof net, but also can tightly fix warp fiber bundle and weft fiber bundle, prevent fiber bundle from slipping or separating when stressed, effectively reduce the risk of stress concentration, at the same time, the cooperation of bundle fiber and embedded compression sheet can limit the displacement and deformation of fiber bundle under the action of shearing force, thereby improving the shear resistance of false roof net. The support false roof net has simple structure, light quality, high corrosion resistance and wear resistance, can adapt to various complex geological conditions, such as humid, corrosive gas and other harsh environments, has long service life and low maintenance cost.

[0018] The warp fiber bundle includes a plurality of warp polyester fibers and a plurality of warp carbon fibers; the weft fiber bundle includes a plurality of weft polyester fibers and a plurality of weft carbon fibers. The polyester fiber has good wear resistance and wrinkle resistance, which helps to maintain the shape and stability of the false roof net, but the shear strength is low. The addition of carbon fiber can effectively compensate for the defects of polyester fiber itself while maintaining good wear resistance and wrinkle resistance. In addition, the proportion of carbon fiber and polyester fiber in the warp and weft fiber bundles can be adjusted to meet the needs of different support scenarios.

[0019] The surface of the warp fiber bundle and the weft fiber bundle is coated with a flame-retardant antistatic high-molecular polymer chemical colloid layer. The flame-retardant antistatic high-molecular polymer chemical colloid layer has significant flame-retardant properties and can form a protective layer at high temperatures, thus having flame-retardant properties.

[0020] The warp fiber bundle and the weft fiber bundle are tightly pressed and fixed together by the fixed connecting piece passing through the connecting hole on the embedded pressing sheet. This fastening connection mode effectively enhances the connection strength between the fiber bundles, so that the overall structure of the supporting false roof net is more stable. In a long-term stress or vibration environment, the fiber bundles are prone to loosen or displace, and the design of the embedded pressing sheet and the fixed connecting piece can effectively prevent the loosening of the fiber bundles and maintain the integrity and supporting effect of the supporting false roof net. At the same time, the embedded pressing sheet and the fixed connecting piece provide additional connection points between the fiber bundles, which can disperse stress, so that the supporting false roof net is more uniform when stressed, further reducing stress concentration, thereby improving the supporting strength.

[0021] The embedded pressing sheet is provided with a plurality of anchoring spikes inside, which are embedded into the warp fiber bundle and / or the weft fiber bundle.

[0022] The anchoring spike comprises a cylinder and a plurality of anchor spikes arranged axially along the cylinder, and the anchor spike is in the structure of an arrowhead. The anchoring spike forms a mechanical connection with the inside of the fiber bundle by physical embedding. This connection mode is more secure than simple pressing or bonding, which can effectively prevent the sliding and falling of the fiber bundle during stress.

[0023] The edge of the embedded pressing sheet is provided with a cutting-resistant flexible edge, which not only can reduce the strength reduction of the supporting false roof net caused by the damage of the fiber bundle at the edge of the embedded pressing sheet, but also can effectively improve the overall coordination of the supporting false roof net.

[0024] The cutting-resistant flexible edge is a polyurethane-coated fiber cutting-resistant flexible edge. Polyurethane-coated fiber is known for its high strength and wear resistance, and when it is used as a cutting-resistant flexible edge, it can significantly improve the cutting-resistant performance of the supporting false roof net. This material can effectively resist cutting and wear of sharp objects, thereby protecting the edge of the supporting false roof net from damage and prolonging its service life.

[0025] The utility model also provides a supporting system comprising the above-mentioned carbon fiber reinforced supporting false roof net for underground coal mine. The supporting system has better supporting strength and stability, low maintenance cost, and can effectively isolate dangerous areas such as rocks, coal seams and roof above the stratum, greatly reducing the safety risk in mine operation. The supporting system is more suitable for coal mine underground support in humid, corrosive gas and other harsh environments in the mine. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole structure schematic view of the carbon fiber reinforced supporting false roof net for underground coal mine.

[0027] Figure 2The utility model discloses a kind of carbon fiber reinforced coal mine supporting false roof net connection overall structural diagram for underground.

[0028] Figure 3 The utility model discloses a kind of carbon fiber reinforced coal mine supporting false roof net connection partial structural diagram for underground.

[0029] Figure 4 For Figure 3 The enlarged view of A.

[0030] Figure 5 The utility model discloses an embedded pressing piece structural diagram.

[0031] Figure 6 The utility model discloses an embedded pressing piece side view.

[0032] Figure 7 The utility model discloses an embedded pressing piece connecting structure schematic view.

[0033] Wherein, 1-meridional fiber bundle, 2-weft fiber bundle, 3-bundling fiber, 4-embedded pressing piece, 41-connecting hole, 42-fixed connecting piece, 43-anchoring thorn, 431-cylinder, 432-anchor thorn, 44-anti-cutting flexible edge. DETAILED DESCRIPTION

[0034] To make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely in the following with the drawings in the utility model embodiment, apparently, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. The components of the utility model embodiment described and shown in the drawing here can be arranged and designed in various different configurations.

[0035] Therefore, the detailed description of the embodiment of the utility model provided in the drawing below is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the protection of the utility model.

[0036] It should be noted that: similar signs and letters indicate similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the embodiments of the utility model, it needs to be explained that if the terms "upper", "lower", "horizontal", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the utility model product in common use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0038] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0039] In the description of the embodiments of the utility model, it also needs to be explained that unless otherwise explicitly specified and limited, if the terms "set", "install", "connect", "connect" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0040] The utility model will be further described in detail below in combination with specific embodiments, which is an explanation of the utility model rather than a limitation.

[0041] Referring to Figures 1 to 4The utility model provides a kind of carbon fiber reinforced support false roof net for coal mine underground, including several warp fiber bundles 1 and several weft fiber bundles 2, several warp fiber bundles 1 and several weft fiber bundles 2 cross arrangement, form cross-overlapping, and same warp fiber bundle 1 and weft fiber bundle 2 are fixed by same bundle fiber 3 at overlapping, preferably, bundle fiber 3 is crossed and wound along the length direction of warp fiber bundle 1, and weft fiber bundle 2 and bundle fiber 3 are bonded by adhesive bonding;Warp fiber bundle 1 and weft fiber bundle 2 are provided with embedded compression sheet 4 at overlapping, the embedded compression sheet 4 is separately arranged on the outside of bundle fiber 3, and relatively matched embedded into warp fiber bundle 1 and / or weft fiber bundle 2, can enhance the integrity of support false roof net, bear higher shear force and not easy to loosen;Preferably, the warp fiber bundle 1 includes several warp polyester fibers and several warp carbon fibers;The weft fiber bundle 2 includes several weft polyester fibers and several weft carbon fibers, and carbon fiber provides excellent mechanical properties for traditional support false roof net with its high strength, high modulus characteristics, when bearing the huge pressure of upper rock stratum, carbon fiber reinforced support false roof net can more effectively disperse pressure, prevent roof collapse, simultaneously, compared with traditional polyester fiber support false roof net, the weight of support false roof net added with carbon fiber is lighter, reduces roadway deformation, reduces roadway maintenance engineering quantity, is convenient for transportation and installation;Preferably, the surface of warp fiber bundle 1 and weft fiber bundle 2 is covered with flame-retardant antistatic high-molecular polymer colloid layer, and further preferably polyvinyl chloride coating;The bundle fiber 3 is polyester filament;The embedded compression sheet 4 is quadrilateral structure, and the material is carbon steel, and the edge of the embedded compression sheet 4 is provided with anti-cutting flexible edge 44, and further preferably, the anti-cutting flexible edge 44 is polyurethane coating fiber anti-cutting flexible edge.

[0042] See Figures 5 to 7 Several connecting holes 41 and several fixed connecting pieces 42 are provided on the embedded compression sheet 4, the fixed connecting piece 42 sequentially passes through the connecting hole 41 on the embedded compression sheet 4 relatively matched embedded into warp fiber bundle 1 and / or weft fiber bundle 2, and warp fiber bundle 1 and weft fiber bundle 2 are tightly fixed. Alternatively, the fixed connecting piece 42 can be screw nut fixed form, or rivet fixed form, or the structure of connection fixing part known to those skilled in the art. Several anchoring thorns 43 are provided on the opposite inner side of the embedded compression sheet 4, and the anchoring thorn 43 is embedded into warp fiber bundle 1 and / or weft fiber bundle 2. The anchoring thorn 43 includes cylinder 431 and several anchor thorns 432, the anchor thorn 432 is arranged along the axis of cylinder 431, and the anchor thorn 432 is arrowhead type structure, which can smoothly embed the anchoring thorn 43 into the fiber bundle for anchoring, and is not easy to fall off.

[0043] The utility model also provides a kind of supporting system, including above-mentioned carbon fiber reinforced support false roof net for underground coal mine. This supporting system has better supporting strength and stability, maintenance cost is low, can effectively isolate dangerous area such as rock, coal seam and roof above stratum, greatly reduce the safety risk in mine operation. This supporting system is more suitable for the coal mine underground support of humid, corrosive gas and other harsh environments in mine.

[0044] In conclusion, the utility model provides a kind of carbon fiber reinforced support false roof net for underground coal mine and supporting system, by the reinforcing structure of warp fiber bundle 1 and weft fiber bundle 2 cross binding structure and by embedding type compression sheet 4, each part of support false roof net can be effectively connected closely together, form a more stable overall structure, this structure can better resist external pressure and tension, improve the shear resistance and deformation resistance of support false roof net, reduce construction difficulty and labor intensity, improve support efficiency, prolong the service life of support engineering, improve the quality of mine roadway support engineering, also can play excellent support effect in the mine of complex geological conditions and harsh environment.

[0045] The above is only the preferred embodiment of the utility model, and does not use to limit the technical scheme of the utility model, and those skilled in the art should understand that, without departing from the spirit and principles of the utility model, the technical scheme can be modified and replaced, and these modifications and replacements also belong to the protection scope covered by the claims.

Claims

1. A carbon fiber reinforced support false roof net for use in a coal mine underground, characterized by, The warp fiber bundle (1) and the weft fiber bundle (2) are arranged in cross and form a cross overlap, and the same warp fiber bundle (1) and weft fiber bundle (2) are fixed by the same binding fiber (3) at the overlap; the warp fiber bundle (1) and the weft fiber bundle (2) are provided with embedded pressing sheets (4) at the overlap, the embedded pressing sheets (4) are arranged on the outer side of the binding fiber (3) and are embedded into the warp fiber bundle (1) and / or the weft fiber bundle (2) in opposite cooperation.

2. The carbon fiber reinforced support false roof mesh for underground coal mine use according to claim 1, characterized in that, The warp fiber bundle (1) comprises a plurality of warp polyester fibers and a plurality of warp carbon fibers; the weft fiber bundle (2) comprises a plurality of weft polyester fibers and a plurality of weft carbon fibers.

3. The carbon fiber reinforced support false roof mesh for underground coal mine according to claim 1, characterized in that, The surface of the warp fiber bundle (1) and the weft fiber bundle (2) is covered with a flame-retardant antistatic high-molecular polymer colloid layer.

4. The carbon fiber reinforced support false roof mesh for underground coal mine according to claim 1, characterized in that, The embedded pressing sheet (4) is provided with a plurality of connecting holes (41).

5. The carbon fiber reinforced support false roof mesh for underground coal mine use according to claim 4, characterized in that, The embedded pressing sheet (4) is further provided with a fixed connecting piece (42), the fixed connecting piece (42) passes through the connecting holes (41) on the embedded pressing sheets (4) embedded into the warp fiber bundle (1) and / or the weft fiber bundle (2) in opposite cooperation in sequence, and the warp fiber bundle (1) and the weft fiber bundle (2) are pressed and fixed.

6. The carbon fiber reinforced support false roof mesh for underground coal mine use according to claim 1, characterized in that, The embedded pressing sheet (4) is provided with a plurality of anchoring spikes (43) on the inner side, the anchoring spikes (43) are embedded into the warp fiber bundle (1) and / or the weft fiber bundle (2).

7. The carbon fiber reinforced support false roof mesh for underground coal mines according to claim 6, characterized in that, The anchoring spike (43) comprises a cylinder (431) and a plurality of anchor spikes (432), the anchor spikes (432) are arranged in the axial direction of the cylinder (431), and the anchor spikes (432) are in the structure of an arrowhead.

8. The carbon fiber reinforced support false roof mesh for underground coal mine use according to claim 1, characterized by, The edge of the embedded pressing sheet (4) is provided with a cutting-resistant flexible sealing edge (44).

9. The carbon fiber reinforced support false roof mesh for underground coal mines according to claim 8, characterized in that, The cutting-resistant flexible sealing edge (44) is a polyurethane coating fiber cutting-resistant flexible sealing edge.

10. A support system characterized in that, The carbon fiber reinforced supporting false roof net for underground coal mine comprises the carbon fiber reinforced supporting false roof net for underground coal mine.

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