Protective device for mine goaf filling equipment
By designing an arched support structure and buffer device, the protection problem of the paste conveying pipeline of the filling equipment in the goaf of the mine was solved, the pressure resistance and stability of the equipment were improved, maintenance costs and safety risks were reduced, and the stable operation of the equipment was ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-19
- Publication Date
- 2026-03-27
AI Technical Summary
The existing paste conveying pipelines of mine goaf filling equipment lack external protection, making them susceptible to pipeline rupture and accelerated wear due to goaf collapse and rockfall impact, which can lead to paste leakage, system shutdown and secondary ground subsidence, increasing maintenance costs and safety risks.
A protective device was designed, comprising a buffer structure, a sliding rod structure, an arched support structure, an adjustable base, and a liftable support device. The vertical impact load is converted into compressive stress through the arched beam, and the impact force is dispersed by basalt fiber cloth and alloy mesh, thereby improving the compressive strength and lateral stability and adapting to different tunnel cross sections.
It effectively avoids pipe rupture and wear, improves the equipment's pressure resistance and lateral stability, reduces maintenance costs and safety risks, and ensures the stable operation of the filling equipment.
Smart Images
Figure CN224049262U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of coal mining industry, especially relate to a protection device for mine goaf filling equipment. BACKGROUND
[0002] The filling equipment of mine goaf subsidence is the key technical equipment for governing the underground cavity formed after mining, preventing ground subsidence and ensuring the safety of mining area in mining engineering. By preparing paste material (such as tailings, gelling agent) and pumping to the goaf, a stable filling body is formed to control the ground settlement. As the core conveying carrier, the paste conveying pipeline needs to withstand high pressure (15-30MPa) and long distance (up to 5km) paste flow, which ensures uniform material conveying and maintains the strength of the filling body. Because the pipeline of the filling equipment in the related technology lacks external protection structure, the pipeline is prone to rupture and wear due to goaf subsidence, rockfall impact or rock layer dislocation, which further causes paste leakage, system shutdown and secondary ground subsidence, and greatly increases the maintenance cost and safety risk. SUMMARY
[0003] Therefore, the utility model aims at solving one of the problems in the related art at least to some extent.
[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:
[0005] A protection device for mine goaf filling equipment, comprising a buffer structure, a slide rod structure, two arch-shaped support structures, two adjustable bases and four liftable support devices;
[0006] The two arch-shaped support structures are symmetrically arranged left and right, and the two adjustable bases are symmetrically arranged front and back at the bottom of the two arch-shaped support structures. Each adjustable base is connected with the two arch-shaped support structures, and two liftable support devices are symmetrically arranged below each adjustable base.
[0007] The two arch-shaped support structures are connected through the slide rod structure.
[0008] The buffer structure is used to cover the two arch-shaped support structures.
[0009] The two arch-shaped support structures are arranged above the paste conveying pipeline of the mine goaf filling equipment.
[0010] Further, the arch-shaped support structure comprises two arch-shaped supports and two fixed plates, the two arch-shaped supports are arranged side by side, the ends of the two arch-shaped supports are connected through a fixed plate, the bottom of the arch-shaped support is connected with the adjustable base, and the top of the arch-shaped support is connected with the buffer structure.
[0011] Further, the arch-shaped support comprises an arch-shaped beam and two legs, the top of the arch-shaped beam is connected with the buffer structure, the two legs are symmetrically arranged at the two ends of the arch-shaped beam, and the bottom of the leg is connected with the adjustable base.
[0012] Further, the adjustable base comprises a guide plate, two sliding bases and two sliding lockers, the middle of the guide plate is provided with a guide sliding groove, the bottom of the leg is fixedly connected with the upper end surface of the sliding base, the two sliding bases are symmetrically arranged above the guide plate, each sliding base is connected with the guide sliding groove through a sliding locker, and the liftable supporting device is arranged below the guide plate.
[0013] Further, the adjustable base further comprises a locking assembly and two locking plates, one locking plate is arranged at the inner side end of each sliding base, the locking plate is provided with an adjusting notch, and the adjusting notches of the two locking plates are connected and fixed through the locking assembly.
[0014] Further, the slide rod structure comprises a plurality of guide rods, and each guide rod is in sliding fit with the arch-shaped beam.
[0015] Further, the buffer structure comprises basalt fiber cloth and alloy mesh, the basalt fiber cloth is arranged outside the alloy mesh, and the basalt fiber cloth and the alloy mesh are connected with the arch-shaped beam through screws.
[0016] Further, the liftable supporting device is an electric push rod or an air cylinder.
[0017] Compared with the prior art, the protective device for the filling equipment of the mined-out area has the following advantages:
[0018] 1. The geometric shape of the arch-shaped beam can convert the vertical impact load into the compressive stress along the direction of the arch axis, so that the bending moment is avoided. The actual measurement shows that the compressive capacity of the arch-shaped structure is improved by 3-5 times compared with the flat top structure. The two arch-shaped supports arranged side by side through the cooperation of the double arches form a spatial truss system through the fixing plate, the lateral stability is improved, and the horizontal shear force caused by mining can be resisted. The sliding fit of the guide rod and the arch-shaped beam can adjust the spacing between the two arch-shaped support structures. The combination of the guide sliding groove and the sliding locker in the sliding adjustment of the base makes the span of the arch support adjustable, and is suitable for different roadway sections.
[0019] 2. The outer basalt fiber cloth can resist piercing by sharp falling rocks. The impact energy is dissipated through fiber layer sliding, and the instantaneous load peak value is reduced. The inner alloy mesh is a three-dimensional mesh structure that disperses the concentrated impact force to the arch-shaped support. Under the synergistic action of the basalt fiber cloth, the overall energy absorption rate of the buffer structure can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0020] The accompanying drawings, which form a part of this patent, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
[0021] Figure 1 A protective device for a mine goaf filling equipment according to an embodiment of the present application;
[0022] Figure 2 Two arch-shaped support structure schematic diagrams according to an embodiment of the present application;
[0023] Figure 3 Adjustable base structure schematic diagram according to an embodiment of the present application;
[0024] Figure 4 Two locking plate structure schematic diagrams according to an embodiment of the present application.
[0025] Legend of the figures:
[0026] 100, buffer structure; 200, liftable support device; 300, guide plate; 310, sliding locker; 400, support leg; 410, fixed plate; 420, sliding base; 500, arch-shaped beam; 600, sliding rod structure; 710, locking plate; 720, locking assembly. DETAILED DESCRIPTION
[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0029] In the description of the utility model, it is necessary to explain, unless there is definite stipulation and limitation, the term "installation", "connection", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements inside, for the ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood by specific circumstances.
[0030] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.
[0031] A kind of protective device for mine goaf filling equipment, as shown in Figure 1 Two arch-shaped support structures are symmetrically arranged left and right, two adjustable bases are symmetrically arranged at the bottom of the two arch-shaped support structures front and back, each adjustable base is connected with the two arch-shaped support structures, and two liftable support devices 200 are symmetrically arranged below each adjustable base. The liftable support device 200 is an electric push rod.
[0032] The two arch-shaped support structures are connected by the slide bar structure 600. The buffer structure 100 is used to cover the two arch-shaped support structures. The two arch-shaped support structures are arranged above the paste body conveying pipeline of the mine goaf filling equipment.
[0033] As shown in Figure 2 The arch-shaped support structure includes two arch-shaped supports and two fixed plates 410. The two arch-shaped supports are arranged side by side, and the ends of the two arch-shaped supports are connected by a fixed plate 410. The bottom of the arch-shaped support is connected with the adjustable base, and the top of the arch-shaped support is connected with the buffer structure. The arch-shaped support includes an arch-shaped beam 500 and two legs 400. The top of the arch-shaped beam 500 is connected with the buffer structure 100, and the two legs 400 are symmetrically arranged at the two ends of the arch-shaped beam 500. The bottom of the leg 400 is connected with the adjustable base. The slide bar structure 600 includes a plurality of guide rods, each of which is in sliding cooperation with the arch-shaped beam 500. The geometric shape of the arch-shaped beam 500 can convert the vertical impact load into compressive stress along the arch axis direction, avoiding bending moment concentration. The actual measurement shows that the arch structure can improve the compressive capacity by 3-5 times compared with the flat top structure. The two arch-shaped supports arranged side by side in a double-arch cooperative manner form a space truss system through the fixed plate 410, and the lateral stability is improved to resist the horizontal shear force caused by mining. The sliding cooperation of the guide rods and the arch-shaped beam 500 can adjust the distance between the two arch-shaped support structures. The combination of the base sliding adjustment guide groove and the sliding lock 310 makes the arch span adjustable, which is suitable for different roadway sections.
[0034] As Figure 3 shown, the adjustable base includes a guide plate 300, two sliding bases 420, and two sliding locks 310. The middle of the guide plate 300 is provided with a guide sliding groove. The bottom of the leg 400 is fixedly connected with the upper end surface of the sliding base 420. The two sliding bases 420 are symmetrically arranged above the guide plate 300. Each sliding base 420 is connected with the guide sliding groove through a sliding lock 310. The liftable support device 200 is arranged below the guide plate 300.
[0035] As Figure 4 shown, the adjustable base further includes a locking assembly 720 and two locking plates 710. The inner side end of each sliding base 420 is correspondingly provided with a locking plate 710. The locking plate 710 is provided with an adjusting notch. The adjusting notches of the two locking plates 710 are connected and fixed through the locking assembly 720. The locking assembly 720 is composed of a bolt, a nut, and a non-slip pad.
[0036] The buffer structure 100 includes basalt fiber cloth and alloy mesh. The basalt fiber cloth is arranged outside the alloy mesh. The basalt fiber cloth and the alloy mesh are connected with the arch-shaped beam 500 through screws. The outer basalt fiber cloth can resist piercing by sharp falling rocks. The impact energy is dissipated through fiber layer sliding, and the instantaneous load peak value is reduced. The inner alloy mesh is a three-dimensional mesh structure that disperses the concentrated impact force to the arch-shaped support. Under the synergistic action of the basalt fiber cloth, the overall buffer structure 100 can improve the energy absorption rate.
[0037] The working mode of the present example
[0038] Step one, mark the center line of the paste conveying pipeline along the goaf (pipeline diameter DN200-300mm, distance from the floor height 1.5-2m).
[0039] Every 3m sets a group of arch-shaped support structure, covering the pipeline section threatened by collapse / falling rocks (such as fault zone, broken rock zone) throughout the journey.
[0040] Clean the floating stone and debris within 1m range on both sides of the pipeline. Lay C20 concrete cushion (thickness 100mm, width 800mm) on the soft rock ground to ensure that the flatness error of the adjustable base bearing surface is ≤5mm / m.
[0041] Step two, place the guide plate 300 (length 2m, with guide sliding groove) horizontally on the pretreated foundation on both sides of the pipeline. The spacing is adjusted according to the actual width of the roadway (typical value 3-4m). The liftable support device 200 supports the guide plate 300.
[0042] The sliding base 420 is connected with the guide sliding groove through the sliding lock 310 (M16 bolt pre-tightening force ≥80 N·m) and is initially locked in the middle. Electric push rods (stroke 300 mm, thrust 10 kN) are installed at four corners of the guide plate 300, and the bottom of the push rod is anchored to the concrete cushion layer (Φ20 chemical anchor bolt, pullout resistance ≥50 kN) through a flange plate. The push rod is started to preliminarily level, so that the horizontal degree error of the guide plate 300 is ≤2 mm / m.
[0043] Step three, the single-arch support is formed by combining an arch beam 500 (H-shaped steel 200×200×8×12) with two legs 400 (square steel 120×120×6 mm), and is connected into a double-arch truss structure through a fixed plate 410 (thickness 20 mm Q355B steel plate). The arch support is hoisted to the preset position of the adjustable base, and the bottom of the leg 400 is welded and fixed with the sliding base 420 (welding grade II, qualified after flaw detection).
[0044] The two groups of arch support structures are symmetrically connected across the top of the paste conveying pipeline, and the vertical distance from the arch top to the outer wall of the pipeline is ≥300 mm (space reserved for buffer layer installation). The alignment of the double-arch axis is calibrated through a total station instrument (deviation ≤5 mm), to ensure uniform stress.
[0045] Step four, the corrugated alloy mesh (316L stainless steel, grid 50×50 mm) is unfolded along the top of the arch beam 500, fixed through M12 countersunk screws (spacing 300 mm), and pre-tightened with a torque of 45 N·m. The edge of the alloy mesh extends to the arch foot and is bolted with the lateral reinforcement plate of the leg 400. Basalt fiber cloth is covered
[0046] The basalt fiber cloth (surface density 2.5 kg / m 2 ) is laid outside the alloy mesh, fixed with U-shaped battens (width 40 mm) and self-centering rivets (Φ4.8 mm), and the lap width is ≥100 mm. High-temperature resistant silicone sealant (thickness 2-3 mm) is applied at the joint of the fiber cloth to prevent debris from penetrating.
[0047] Step five, three guide rods (Φ40 mm galvanized steel pipes, length 4 m) are arranged in parallel between the double-arch beams 500, and the two ends are dynamically connected with the arch beam through the reserved sliding grooves of the sliding blocks (polytetrafluoroethylene bushings), allowing horizontal displacement compensation of ±150 mm.
[0048] The height of the guide rod is adjusted so that the center line of the pipeline is located at the geometric center of the double-arch protection area (deviation ≤10 mm).
[0049] The settlement of the goaf is simulated (hydraulic jack loading 50 mm displacement), the sliding smoothness of the sliding rod structure 600 is verified (friction coefficient ≤0.08), and it is ensured that the double-arch collaborative deformation does not jam.
[0050] Step six, start the electric push rod automatic leveling mode, real-time adjust the height of four corners through the inclination sensor (accuracy ± 0.1°), until the overall levelness of the arch support structure is ≤3mm / 10m.
[0051] The sliding base 420 is unlocked, the arch spacing is fine-tuned according to the actual span of the roadway (stepping accuracy ± 2mm), and the locking assembly 720 applies a pre-tightening force of 80kN.
[0052] The buffer structure 100 is subjected to a drop hammer test (impact energy 50kJ) to detect that the strain increment of the pipeline is ≤100με (safety threshold 500με), the basalt fiber cloth is not torn, and the plastic deformation of the alloy mesh is ≤5%.
[0053] A pH=3 acidic solution (simulating mine water) is sprayed for 48 hours to check that the corrosion rate of the alloy mesh is ≤0.01mm / year, and the function of the buffer structure 100 is not attenuated.
[0054] Step seven, embed a distributed optical fiber (DTS system) along the top of the arch beam 500, set up 1 measuring point per meter, and real-time monitor the structure strain (accuracy ± 2με) and temperature (±0.5℃).
[0055] Data access to the mine central control system, set the alarm threshold: strain >2000με or subsidence rate >10mm / d triggers a three-level early warning.
[0056] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A protective device for filling equipment in goaf areas of mines, characterized in that: It includes a buffer structure (100), a sliding rod structure (600), two arched support structures, two adjustable bases, and four liftable support devices (200); The two arched support structures are symmetrically arranged on the left and right, and the two adjustable bases are symmetrically arranged at the bottom of the two arched support structures. Each adjustable base is connected to the two arched support structures, and two lifting support devices (200) are symmetrically arranged below each adjustable base. The two arched support structures are connected by the sliding rod structure (600). The buffer structure (100) is used to cover the two arched support structures; The two arched support structures are positioned above the paste conveying pipeline of the filling equipment in the goaf of the mine.
2. A protective device for filling equipment in goaf areas of mines according to claim 1, characterized in that: The arched support structure includes two arched brackets and two fixing plates (410). The two arched brackets are arranged side by side, and the ends of the two arched brackets are connected by one of the fixing plates (410). The bottom of the arched bracket is connected to the adjustable base, and the top of the arched bracket is connected to the buffer structure.
3. A protective device for filling equipment in goaf areas of mines according to claim 2, characterized in that: The arched support includes an arched beam (500) and two legs (400). The top of the arched beam (500) is connected to the buffer structure (100). The two legs (400) are symmetrically arranged at both ends of the arched beam (500). The bottom of the legs (400) is connected to the adjustable base.
4. A protective device for filling equipment in goaf areas of mines according to claim 3, characterized in that: The adjustable base includes a guide plate (300), two sliding bases (420), and two sliding locking devices (310). The guide plate (300) has a guide groove in the middle. The bottom of the support leg (400) is fixed to the upper surface of the sliding base (420). The two sliding bases (420) are symmetrically arranged above the guide plate (300). Each sliding base (420) is connected to the guide groove through a sliding locking device (310). The liftable support device (200) is arranged below the guide plate (300).
5. A protective device for filling equipment in goaf areas of mines according to claim 4, characterized in that: The adjustable base also includes a locking assembly (720) and two locking plates (710). Each sliding base (420) has a corresponding locking plate (710) on its inner end. The locking plate (710) is provided with an adjustment slot. The adjustment slots of the two locking plates (710) are connected and fixed by the locking assembly (720).
6. A protective device for filling equipment in goaf areas of mines according to claim 4, characterized in that: The slide bar structure (600) includes a plurality of guide rods, each of which is slidably engaged with the arch beam (500).
7. A protective device for filling equipment in goaf areas of mines according to any one of claims 4-6, characterized in that: The buffer structure (100) includes basalt fiber cloth and alloy mesh. The basalt fiber cloth is placed on the outside of the alloy mesh. Both the basalt fiber cloth and the alloy mesh are connected to the arch beam (500) by screws.
8. A protective device for filling equipment in a mining goaf area according to any one of claims 1-6, characterized in that: The liftable support device (200) is an electric push rod or a cylinder.