A new type of shed structure

Abstract

The utility model relates to coal mine underground roof supporting structure, concretely relates to a novel frame shed structure, including two section I -beam shed roof beams 1 at the top, and the adjacent end of two section I -beam shed roof beam all respectively sets up U type buckle, and the lower end of two U type buckles is commonly provided with the crimping steel sheet, and the lower end of U type buckle is rotated and is equipped with the nut after passing through crimping steel sheet and realizes the connection, and two section I -beam shed roof beam is connected together and is slightly arched, the bottom welding of crimping steel sheet has U type steel clamping groove, and the U type steel clamping groove inserts and has U type steel middle column, the bottom of the end of two section I -beam shed roof beam far away from each other is connected with U type steel shed leg respectively, the utility model frame shed structure supporting strength is equal to the 4 times of original supporting strength, the connection mode of middle column and roof beam is detachable, and can be removed, not only is used for slightly arched shed but also can be used for other metal shed type support, when using in the pit, the middle column position can be adjusted according to the actual use and the maximum deformation point of roof, satisfies the support requirement of different roadway.

Description

Technical Field

[0001] This utility model relates to underground roof support structures in coal mines, specifically a novel scaffold structure. Background Technology

[0002] Currently, in underground support systems, traditional trapezoidal or micro-arched roof supports employ a "one beam, two legs" support configuration. However, this structure is prone to deformation under roof pressure and has limited load-bearing capacity. As underground mining extends to deeper levels, mine pressure gradually increases, tunnel spans widen, and the performance of roof beam materials becomes more restrictive. Under mine pressure, roof beams are prone to deformation, leading to roof subsidence and more severe mine pressure manifestation. Traditional support methods can no longer meet the support requirements.

[0003] To improve support strength, two methods are commonly used underground: one is to install a central prop, which involves driving a single hydraulic prop into the middle of a trapezoidal or arched support beam to alleviate mine pressure; the other is to select higher-grade U-shaped steel, I-beams, or other forms of structural steel as the support material to increase support strength. However, both methods have significant limitations. First, single hydraulic props are expensive and have a limited lifespan, requiring periodic replacement, which adds to support costs. Second, while higher-grade steel can increase support strength, its weight also increases, leading to higher support costs and increased labor intensity.

[0004] In summary, traditional support methods face numerous challenges in deep mining. While existing improvements can enhance support strength to some extent, they also introduce problems such as high cost, high labor intensity, and limited service life. This indicates a need for further research and development of more efficient, economical, and reliable support technologies to adapt to the complex conditions of deep mining.

[0005] Therefore, the traditional frame support method needs to be modified to meet the requirements of high-strength support in underground mines. Summary of the Invention

[0006] This utility model provides a new type of shed structure to solve the technical problems of low strength and high support cost of existing "one beam and two legs" shed-type support.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a novel shed structure, including two I-beam shed beams 1 located at the top, with U-shaped buckles fitted at adjacent ends of the two I-beam shed beams, and a pressing steel plate passing through the lower ends of the two U-shaped buckles. After the lower ends of the U-shaped buckles pass through the pressing steel plate, nuts are screwed on to achieve connection. The two I-beam shed beams are connected together in a slightly arched shape. A U-shaped steel groove is welded to the bottom of the pressing steel plate, and a U-shaped steel central column is inserted into the U-shaped steel groove. U-shaped steel shed legs are respectively connected to the bottom of the two I-beam shed beams at opposite ends. Bases are welded to the bottom of the U-shaped steel central column and the U-shaped steel shed legs.

[0008] Furthermore, each of the U-shaped steel canopy legs on both sides is connected to multiple back plates from top to bottom, and the top of the I-beam canopy beam is also connected to multiple back plates.

[0009] Furthermore, the U-shaped steel canopy leg includes an upper canopy leg and a lower canopy leg; the upper canopy leg and the lower canopy leg are connected together by U-shaped steel bracket cable clamps and cable clamp bolts.

[0010] Furthermore, the U-shaped steel central column includes an upper leg and a lower leg, which are connected together by a U-shaped steel bracket cable clamp and cable clamp bolts.

[0011] Furthermore, the U-shaped steel central column is a 29# U-shaped steel, and the I-beam shed beam is a 12# mining I-beam. Using this shed-building method is not limited to the type of steel beam used; suitable steel beams can be selected based on the tunnel span and roof pressure.

[0012] Furthermore, the U-shaped buckle is model M12*102.

[0013] Furthermore, the thickness of the pressing steel plate is 10mm.

[0014] Furthermore, the connection between the U-shaped steel slot and the U-shaped steel central column is secured with double-strand No. 8 iron wire to prevent tipping.

[0015] Furthermore, multiple tie rod sleeves are welded onto both the U-shaped steel central column and the U-shaped steel canopy legs.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Compared with the traditional "one beam and two legs" scaffolding support method, the "one beam and three legs" method can improve the scaffolding support strength. The improved support strength is equal to 4 times the original support strength.

[0017] 2. The connection between the central column and the top beam is detachable and removable, which can be used not only for micro-arched sheds but also for other trapezoidal sheds.

[0018] 3. When used underground, the position of the central column can be adjusted according to the actual use of the roadway and the maximum deformation point of the roof to meet the support requirements of different roadways.

[0019] 4. The "one beam and three legs" scaffolding method expands the scope of scaffolding application and can meet the support strength requirements under different jacking pressures.

[0020] 5. The improved design saves on support material costs. The original "one beam, two legs" scaffolding method had limited support strength, necessitating reinforcement with anchor cables and reduced scaffold spacing when roof pressure increased and beam deformation occurred. However, the "one beam, three legs" support method increases beam support strength, and further increases support strength by increasing the pre-tightening torque of the bolts, making the support strength adjustable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a novel shed structure according to the present invention.

[0022] Figure 2 This is a schematic diagram of the U-shaped steel canopy legs and the U-shaped steel central column.

[0023] Figure 3 This is a schematic diagram showing the connection between the two sections of the I-beam roof beam and the middle section.

[0024] Figure 4 for Figure 3 The right view.

[0025] Figure 5 This is a schematic diagram of the press-fit steel plate and the U-shaped steel slot.

[0026] Figure 6 This is a schematic diagram of the welding of the tie rod sleeve.

[0027] Figure 7 This is a sectional view showing the connection between the upper and lower canopy legs.

[0028] The markings in the image are as follows: 1. I-beam canopy beam, 2. Press-fit steel plate, 3. U-shaped buckle, 4. U-shaped steel slot, 5. U-shaped steel central column, 5-1. Upper leg, 5-2. Lower leg, 6. U-shaped steel canopy leg, 6-1. Upper canopy leg, 6-2. Lower canopy leg, 7. Base, 8. Back plate, 9. U-shaped steel bracket cable clamp, 10. Tie rod sleeve, 11. Column socket, 12. Leg socket, 13. Roadway side, 14. Roadway roof, 15. Roadway floor. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments. Example

[0030] like Figure 1As shown, a novel scaffolding structure includes two I-beam beams 1 at the top. Each adjacent end of the two I-beam beams 1 is fitted with a U-shaped buckle 3. The lower ends of the two U-shaped buckles 3 are connected by a pressing steel plate 2. After passing through the pressing steel plate 2, the lower ends of the U-shaped buckles 3 are screwed with nuts to achieve a connection (e.g., ...). Figure 3 and 4 As shown), the two I-beam beams 1 are connected together to form a slightly arched shape. A U-shaped steel groove 4 is welded to the bottom of the pressing steel plate 2, and a U-shaped steel central column 5 is inserted into the U-shaped steel groove 4. U-shaped steel legs 6 are respectively connected to the bottom of the two I-beam beams 1 at their far ends. A base 7 (as shown) is welded to the bottom of both the U-shaped steel central column 5 and the U-shaped steel legs 6. Figure 2 (As shown).

[0031] Furthermore, each of the U-shaped steel canopy legs 6 on both sides is connected to multiple back plates 8 from top to bottom, and the top of the I-beam canopy beam 1 is also connected to multiple back plates 8.

[0032] Furthermore, the U-shaped steel canopy leg 6 includes an upper canopy leg 6-1 and a lower canopy leg 6-2; the upper canopy leg 6-1 and the lower canopy leg 6-2 are connected together by a U-shaped steel bracket cable clamp 9 and cable clamp bolts.

[0033] Furthermore, the U-shaped steel central column 5 includes an upper leg 5-1 and a lower leg 5-2, which are connected together by a U-shaped steel bracket cable clamp 9 and cable clamp bolts.

[0034] Furthermore, the U-shaped steel column 5 is a 29# U-shaped steel, and the I-beam shed beam 1 is a 12# mining I-beam.

[0035] Furthermore, the U-shaped buckle 3 is model M12*102.

[0036] Furthermore, the thickness of the pressing steel plate 2 is 10mm.

[0037] Furthermore, the connection between the U-shaped steel slot 4 and the U-shaped steel central column 5 is secured with double-strand #8 iron wire.

[0038] Furthermore, multiple tie rod sleeves 10 are welded onto the U-shaped steel central column 5 and the U-shaped steel canopy leg 6 respectively, for installing and fixing tie rods, thereby connecting the individual support canopy frames into a stable overall support system.

[0039] This utility model of a canopy structure increases the support strength by 4 times. The principle analysis is as follows: After the roof slab settles, the point with the greatest deformation (relative movement between the top and bottom) is in the middle of the roof slab. The formula for calculating the pressure it can withstand is as follows: ①. Uniformly distributed load:

[0040] Where: q—local load bearing capacity, kN / m; [σ] — Required stress: 510 MPa; W—Bending section modulus, taken as 144.5 cm³; l—span, 4.801m.

[0041] ②. Bearing capacity under concentrated load:

[0042] Where: F—bearing capacity, kN / m; [σ] — Required stress: 510 MPa; W—Bending section modulus, taken as 144.5 cm³; l—span, 4.801m.

[0043] ③. In actual on-site construction, the allowable bending and settlement of the canopy beams shall not exceed 100mm. The actual uniformly distributed load borne exceeds the local bearing capacity.

[0044] If a "one beam, three legs" support method is adopted, that is, adding a central column to the original "one beam, two legs" support method, it becomes a one beam, three legs. The bearing capacity under concentrated load is calculated as follows: F 总 =ΔF+F, In the formula, Ftotal represents the total bearing capacity, expressed in kN.

[0045] ΔF—Increase in load-bearing capacity after adding a central column. The central column is made of 29# U-shaped steel, with the lower leg wrapping around the upper leg, and is connected by clamp bolts. Each central column is equipped with 2 clamps, each clamp has 2 bolts, and each bolt has a preload of 200 N.m, for a total of 4 bolts.

[0046] F — Concentrated load bearing capacity, kN.

[0047] Therefore F 总 =202.02+144.46=346.48kN.

[0048] In actual construction, the preload of the guardrail bolts can be adjusted according to the pressure of the top plate, thereby increasing the support bearing capacity of the entire micro-arched shed.

[0049] ④. Improvement of the overall support strength of the canopy beams: The original "one beam and two legs" scaffolding support strength: When the load on the top beam exceeds 144.46kN, the scaffold beam deforms, and the support strength of the scaffold beam is only 144.46kN.

[0050] After adopting the "one beam, three legs" scaffolding support, the overall support strength of the scaffold beam reached 346.48 kN. However, due to limitations imposed by the support strength of the legs on both sides of the scaffold beam, the support strength of the scaffold beam is: 202.02 kN / m under uniformly distributed load, and 202.02 × 3 = 606.06 kN / m under concentrated load. This represents a fourfold increase.

[0051] The connection between the central column and the top beam is detachable and removable, making it suitable not only for micro-arched sheds but also for other trapezoidal sheds.

[0052] When used underground, the position of the central column can be adjusted according to the actual use of the roadway and the maximum deformation point of the roof to meet the support requirements of different roadways.

[0053] This utility model's "one beam, three legs" scaffolding method expands the application range of metal steel scaffolding support, meeting the support strength requirements under different jacking pressures. The improvement saves on support material costs because the original "one beam, two legs" scaffolding method, due to limited support strength, required reinforcement with anchor cables and reduced scaffold spacing to strengthen the support when scaffolding beams deformed due to increased jacking pressure. However, with the "one beam, three legs" support method, the support strength of the scaffolding beam is increased, and the support strength is further enhanced by increasing the pre-tightening torque of the clamp bolts (from 150 N·m to 200 N·m compared to "one beam, two legs"), thus making the support strength adjustable.

Claims

1. A novel scaffolding structure, characterized in that, The structure includes two I-beam beams (1) at the top. Each adjacent end of the two I-beam beams (1) is fitted with a U-shaped buckle (3). The lower ends of the two U-shaped buckles (3) are connected by a pressing steel plate (2). The lower ends of the U-shaped buckles (3) are connected by nuts after passing through the pressing steel plate (2). The two I-beam beams (1) are connected together in a slightly arched shape. The bottom of the pressing steel plate (2) is welded with a U-shaped steel groove (4). A U-shaped steel column (5) is inserted into the U-shaped steel groove (4). The bottom of the two I-beam beams (1) at opposite ends is connected with U-shaped steel legs (6). The bottom of the U-shaped steel column (5) and the U-shaped steel legs (6) are both welded with bases (7).

2. The novel scaffolding structure according to claim 1, characterized in that, The U-shaped steel canopy legs (6) on both sides are connected to multiple back plates (8) from top to bottom, and the top of the I-beam canopy beam (1) is also connected to multiple back plates (8).

3. The novel scaffolding structure according to claim 1, characterized in that, The U-shaped steel canopy leg (6) includes an upper canopy leg (6-1) and a lower canopy leg (6-2); the upper canopy leg (6-1) and the lower canopy leg (6-2) are connected together by a U-shaped steel bracket cable clamp (9) and cable clamp bolts.

4. The novel scaffolding structure according to claim 1, characterized in that, The U-shaped steel column (5) includes an upper leg (5-1) and a lower leg (5-2), which are connected together by a U-shaped steel bracket cable clamp (9) and cable clamp bolts.

5. The novel scaffolding structure according to claim 1, characterized in that, The U-shaped steel column (5) is a 29# U-shaped steel, and the I-beam shed beam (1) is a 12# mining I-beam.

6. The novel scaffolding structure according to claim 1, characterized in that, The U-shaped buckle (3) is model M12*102.

7. The novel scaffolding structure according to claim 1, characterized in that, The thickness of the press-fit steel plate (2) is 10 mm.

8. A novel scaffolding structure according to claim 1, characterized in that, The connection between the U-shaped steel slot (4) and the U-shaped steel column (5) is secured with double-strand No. 8 iron wire.

9. A novel scaffold structure according to claim 1, characterized in that, Multiple tie rod sleeves (10) are welded onto the U-shaped steel central column (5) and the U-shaped steel canopy leg (6).

Images