Small filling air return reserved well of telescopic sleeve structure and construction method of small filling air return reserved well

Abstract

The invention discloses a small filling air return reserved well of a telescopic sleeve structure and a construction method of the small filling air return reserved well. The small filling air return reserved well comprises a base, a connecting system and a hydraulic system. The telescopic sleeve structure is fixed to the base through the connecting system, the telescopic sleeve structure is unfolded through the hydraulic system, and after drift filling is completed and filling slurry is solidified, a columnar space left in the telescopic sleeve structure is the small filling air return well. An internal space is reserved by the telescopic sleeve structure to serve as a small filling air return well, bases of different specifications can be prefabricated to be compatible with stopes of different heights, rapid installation of the telescopic sleeve structure is achieved by means of a hydraulic system, and the bases and the telescopic sleeve structure are rapidly aligned in the assembling process through the rapid connector modules; and the impermeability of the shaft in the filling process is improved by utilizing the sealing connecting piece. The mining efficiency can be greatly improved, the mining cost is reduced, and the safety of stope stoping operation is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of filling and air return in mine mining, in particular to a retractable sleeve structure for reserved small shafts for filling and air return and a construction method thereof. Background Art

[0002] In recent years, with the continuous improvement of social production and people's living standards, the demand for mineral resources has been increasing. At the same time, in response to waste-free mining and green mining, filling mining has increasingly become a good method for roof management under modern mining techniques with broad application prospects. The filling mining method has the advantages of being able to utilize solid wastes such as tailings, effectively treating goafs, controlling stope ground pressure, and improving the surrounding environment of the mining area, so it is widely used in deep mining.

[0003] In the filling mining method, the filling shaft, as the transportation channel for the filling slurry, is an essential structure in the filling process. At present, although there are many types of methods for reserving small shafts for filling and air return, most of them have slow installation speed and poor sealing performance (such as CN118346340 A, a device and method for reserving air shafts), resulting in delays in the construction progress, and subsequent blasting will also cause more safety problems. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a retractable sleeve structure for reserved small shafts for filling and air return and a construction method thereof, so as to solve the technical problems that when reserving small shafts for filling and air return at present, due to the non-fitting connection, the sealing performance of the device is poor, resulting in a large amount of slurry flowing into the reserved small shaft structure during the filling process, which requires secondary treatment, affecting the mining efficiency, increasing the mining cost, and not ensuring the safety of mining operations.

[0005] To achieve this purpose, the present invention adopts the following technical solutions: A retractable sleeve structure for reserved small shafts for filling and air return, including a base, the base is fixedly arranged at the position of the reserved small shaft for the filling heading to be filled, the top of the base is connected to the retractable sleeve structure through a connection system, the retractable sleeve structure includes a number of cylinders, and the cylinders are driven to expand through a hydraulic system; The telescopic sleeve structure includes: a first hole retaining ring, a slider, a shaft retaining ring, an oil hole, a second hole retaining ring, an oil seal, a soft guide, a drum-shaped ring, and a dust seal; the first hole retaining ring is installed at the inner top of the cylinder barrel to limit the upward movement position of the slider; the slider can slide axially inside the cylinder barrel, and a shaft retaining ring is provided on its outer side to fix its relative position inside the cylinder barrel and prevent it from falling off; the oil hole penetrates the cylinder barrel and the slider to allow the transmission of oil between the cavities; the second hole retaining ring is arranged below the slider and, together with the first hole retaining ring, limits the movement range of the slider; the oil seal is installed between the cylinder barrel and the slider, and a drum-shaped ring is provided outside the oil seal to prevent oil leakage; the soft guide is arranged on the side of the slider and is in sliding fit with the inner wall of the cylinder barrel to guide the smooth telescoping of the slider; the dust seal is installed on the outer periphery of the telescopic structure at the end of the cylinder barrel to prevent external dust and impurities from entering the inside of the cylinder barrel.

[0006] Among them, the first hole retaining ring is installed at the inner top of the cylinder barrel as a limiting element for the slider; the slider moves axially inside the cylinder barrel and, in cooperation with the shaft retaining ring, plays a role in position locking; the oil hole is used for the oil to penetrate through each stage of the slider to achieve the hierarchical extension of hydraulic drive; the second hole retaining ring is arranged at the other end of the slider to play an auxiliary limiting role; the combination of the oil seal and the drum-shaped ring forms an oil seal system to ensure the stable operation of the hydraulic system; the soft guide structure reduces the sliding friction and improves the telescopic stability; the dust seal is arranged at the end of the cylinder barrel to effectively prevent dust from entering the inside of the device and ensure the long-term safe and reliable operation of the system.

[0007] As a further improvement of the technical solution of the present invention, the connection system includes a quick connector module, a quick connection boss, and a pressing module; a quick connector module is provided on the outer periphery of the connection part between the telescopic sleeve structure and the base, several pressing modules are provided on the quick connector module, and a quick connection boss is provided on the pressing module.

[0008] Further, the quick connector module includes an upper module and a lower module, and a pair of mutually matching interface rings are provided at the bottom of the upper module and the top of the lower module, and a rabbet is formed at the joint of the two interface rings.

[0009] Further, the quick connection boss is designed as an inclined surface structure. When the pressing module is fixed on the quick connector module, the two interface rings are butted to form a pressing structure.

[0010] Further, bolt holes are provided on the pressing module, and the pressing module is installed on the quick connector module through bolts passing through the bolt holes.

[0011] Further, the hydraulic system includes an oil inlet provided at the bottom of the telescopic sleeve structure and the cylinder barrel constituting the telescopic sleeve structure; the telescopic sleeve structure is expanded by inputting pressurized oil into the oil inlet.

[0012] Further, the base is welded by a prefabricated cylinder with different specifications and a frustum of a cone.

[0013] The construction method of the filling and return air reserved small shaft with the telescopic sleeve structure includes the following steps: Step 1: Place the base and the telescopic sleeve structure: Fix the base at the position of the reserved filling small shaft in the stope to be filled, and then place the telescopic sleeve structure aligned on the base; Step 2: Connect the base and the telescopic sleeve structure: Connect the telescopic sleeve structure and the base by using the quick coupling module of the connection system, and then fix the pressing module on the interface ring to make the interface rings dock and lock to form a pressing structure. The quick connection boss generates a pre-tightening force under the action of the pressing module, so that the upper module and the lower module are pressed tightly, increasing the sealing performance; Step 3: Expand the telescopic sleeve structure: Deliver oil fluid to the oil inlet, and the oil fluid flows through the oil holes to make the telescopic sleeve structure expand level by level, and finally form a filling and return air small shaft.

[0014] The beneficial effects of the present invention are as follows: 1. It has strong adaptability to the stope and wide application range. The base with different specifications can be prefabricated to be compatible with stopes of different heights.

[0015] 2. It has good sealing performance and anti-seepage performance. A pre-tightening force is generated between the base and the telescopic sleeve structure by the quick connection boss under the action of the pressing module, so that the upper module and the lower module are pressed tightly, improving the sealing performance of the device; the telescopic sleeve structure improves the sealing performance of the device through oil seals and drum rings.

[0016] 3. By adopting the quick coupling module, the connection between the base and the telescopic sleeve structure is faster. With the help of the hydraulic structure, the quick installation of the telescopic sleeve is realized, the installation speed is fast, and the working efficiency is high. Description of the Drawings

[0017] Figure 1 It is a schematic structural view of the filling and return air reserved small shaft with the telescopic sleeve structure of the present invention; Figure 2 It is a sectional view when the telescopic sleeve structure is not expanded; Figure 3 It is a front view of the quick coupling module; Figure 4 It is a side view of the quick coupling module; Reference numerals: 1 - base; 2 - quick connector module; 3 - quick connection boss; 4 - pressing plate; 5 - bolt hole; 6 - oil inlet; 7 - cylinder barrel; 8 - telescopic sleeve structure; 9 - filled roadway; 10 - unfilled roadway; 11 - filling return air shaft; 12 - hole retaining ring 1; 13 - slider; 14 - shaft retaining ring; 15 - oil hole; 16 - hole retaining ring 2; 17 - oil seal; 18 - soft guide; 19 - drum ring; 20 - dust seal. Specific implementation

[0018] To make the technical solutions and advantages of the present invention clearer, the following will be described in detail with reference to the accompanying drawings.

[0019] Referring to Figures 1-4 , a reserved filling return air shaft with a telescopic sleeve structure provided by the present invention includes a base 1, the base 1 is fixedly arranged at the position of the reserved filling shaft of the unfilled roadway 10, the top of the base 1 is connected to the telescopic sleeve structure 8 through a connection system, and the telescopic sleeve structure 8 includes a plurality of cylinder barrels 7, and the cylinder barrels 7 are driven to expand through a hydraulic system; The telescopic sleeve structure 8 includes: a first hole retaining ring 12, a slider 13, a shaft retaining ring 14, an oil hole 15, a second hole retaining ring 16, an oil seal 17, a soft guide 18, a drum ring 19 and a dust seal 20; the first hole retaining ring 12 is installed at the inner top of the cylinder barrel 7 to limit the upward movement position of the slider 13; the slider 13 can slide axially inside the cylinder barrel 7, and an outer shaft retaining ring 14 is provided on its outer side to fix its relative position in the cylinder barrel and prevent it from falling off; the oil hole 15 penetrates the cylinder barrel 7 and the slider 13 for the transmission of oil between cavities; the second hole retaining ring 16 is arranged below the slider 13 and jointly limits the movement range of the slider with the first hole retaining ring 12; the oil seal 17 is installed between the cylinder barrel 7 and the slider 13, and a drum ring 19 is provided on the outer side of the oil seal 17 to prevent oil leakage; the soft guide 18 is arranged on the side of the slider 7 and is slidably matched with the inner wall of the cylinder barrel 7 to guide the smooth expansion and contraction of the slider 7; the dust seal 20 is installed at the outer end of the telescopic structure to prevent external dust and impurities from entering the inside of the cylinder barrel 7.

[0020] Among them, a plurality of sliders 13 are distributed in a sleeve-like multi-stage nested manner, and the sliders 13 are connected through oil holes 15 to form multi-stage oil cavities. Oil seals 17 and drum rings 19 are provided on the outer circles of each stage of sliders to enhance the sealing performance; first hole retaining rings 12 and second hole retaining rings 16 are provided at the upper and lower ends of the slider 13 respectively as mechanical limiting devices to prevent the slider from extending or retracting excessively; a shaft retaining ring 14 is also arranged between each stage of slider and the cylinder barrel 7 to maintain its relative position in the cylinder barrel 7; the soft guide 18 is located on the outer edge of the slider 13 and fits the inner wall of the cylinder barrel 7 to improve the sliding accuracy and reduce wear; a dust seal 20 is installed on the outermost side of the structure to prevent impurities such as ore powder from entering the system and extend the service life of the device.

[0021] Specifically, the connection system includes a quick connector module 2, a quick connection boss 3, and a pressing module 4. The quick connector module 2 is provided on the outer periphery of the connection between the telescopic sleeve structure 8 and the base 1. A number of pressing modules 4 are provided on the quick connector module 2, and a quick connection boss 3 is provided on the pressing module 4. The quick connector module 2 includes an upper module 2-1 and a lower module 2-2. A pair of mating interface rings 2-3 are provided at the bottom of the upper module 2-1 and the top of the lower module 2-2. A rabbet 2-4 is formed at the junction of the two interface rings 2-3. The quick connection boss 3 is designed as an inclined surface structure. When the pressing module 4 is fixed on the quick connector module 2, the two interface rings 2-3 are butt-jointed to form a pressing structure. The pressing module 4 is provided with bolt holes 5, and the pressing module 4 is installed on the quick connector module 2 through bolts passing through the bolt holes 5.

[0022] Specifically, the hydraulic system includes an oil inlet 6 provided at the bottom of the telescopic sleeve structure 8, and a cylinder barrel 7 constituting the telescopic sleeve structure 8. The telescopic sleeve structure 8 is expanded by inputting oil into the oil inlet 6 to increase the pressure.

[0023] Specifically, the base 1 is welded by a prefabricated cylinder of different specifications and a frustum of a cone, and can be compatible with stopes of different heights.

[0024] The construction method of the filling and return air reserved small shaft of the above-mentioned telescopic sleeve structure includes the following steps: Step 1: Place the base and the telescopic sleeve structure. Fix the base 1 at the position of the reserved filling small shaft in the stope to be filled, and then place the telescopic sleeve structure 8 in alignment on the base 1. Step 2: Connect the base and the telescopic sleeve structure. Use the quick connector module 2 of the connection system to connect the telescopic sleeve structure 8 and the base 1, and then fix the pressing module 4 on the interface ring 2-3 to make the interface ring 2-3 butt-jointed and locked to form a pressing structure. The quick connection boss 3 generates a pre-tightening force under the action of the pressing module 4, so that the upper module 2-1 and the lower module 2-2 are pressed together to increase the sealing performance. Step 3: Expand the telescopic sleeve structure: Deliver oil to the oil inlet 6, and the oil flows through the oil hole 15 to make the telescopic sleeve structure 8 expand level by level, and finally form a filling and return air small shaft 11.

[0025] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A filling and return air reserved small shaft with a telescopic sleeve structure, characterized in that It includes a base (1), the base (1) is fixedly arranged at the position of the reserved filling small shaft in the to-be-filled access road (10), the top of the base (1) is connected to a telescopic sleeve structure (8) through a connection system, and the telescopic sleeve structure (8) includes a number of cylinders (7), and the cylinders (7) are driven to expand through a hydraulic system; The telescopic sleeve structure (8) includes: a first hole retaining ring (12), a slider (13), a shaft retaining ring (14), an oil hole (15), a second hole retaining ring (16), an oil seal (17), a soft guide (18), a drum-shaped ring (19) and a dust seal (20); the first hole retaining ring (12) is installed at the inner top of the cylinder (7) to limit the upward movement position of the slider (13); the slider (13) can slide axially inside the cylinder (7), and a shaft retaining ring (14) is arranged on its outer side to fix its relative position in the cylinder and prevent it from falling off; the oil hole (15) penetrates the cylinder (7) and the slider (13) for the transmission of oil between cavities; the second hole retaining ring (16) is arranged below the slider (13) to jointly limit the movement range of the slider with the first hole retaining ring (12); the oil seal (17) is installed between the cylinder (7) and the slider (13), and a drum-shaped ring (19) is arranged outside the oil seal (17) to prevent oil leakage; the soft guide (18) is arranged on the side of the slider (7) and is in sliding fit with the inner wall of the cylinder (7) to guide the smooth expansion and contraction of the slider (7); the dust seal (20) is installed on the outer periphery of the telescopic structure at the end of the cylinder (7) to prevent external dust and impurities from entering the inside of the cylinder (7).

2. The retractable sleeve structure filling and return air reserved small shaft according to claim 1, characterized in that, The connection system includes a quick connector module (2), a quick connection boss (3) and a pressing module (4); a quick connector module (2) is arranged on the outer periphery of the connection part between the telescopic sleeve structure (8) and the base (1), a number of pressing modules (4) are arranged on the quick connector module (2), and a quick connection boss (3) is arranged on the pressing module (4).

3. The filling return air reserved small shaft with a telescopic sleeve structure according to claim 2, characterized in that, The quick connector module (2) includes an upper module (2-1) and a lower module (2-2), a pair of mutually matching interface rings (2-3) are arranged at the bottom of the upper module (2-1) and the top of the lower module (2-2), and a rabbet (2-4) is formed at the joint of the two interface rings (2-3).

4. A reserved small shaft for filling and air return with a telescopic sleeve structure according to claim 3, characterized in that, The quick connection boss (3) is designed as an inclined surface structure. When the pressing module (4) is fixed on the quick connector module (2), the two interface rings (2-3) are butted to form a pressing structure.

5. A reserved small shaft for filling and air return with a telescopic sleeve structure according to claim 4, characterized in that, The pressing module (4) is provided with a bolt hole (5), and the pressing module (4) is installed on the quick connector module (2) through a bolt penetrating the bolt hole (5).

6. A reserved small shaft for filling and air return with a telescopic sleeve structure according to claim 1, characterized in that, The hydraulic system includes an oil inlet (6) arranged at the bottom of the telescopic sleeve structure (8) and the cylinders (7) constituting the telescopic sleeve structure (8); the telescopic sleeve structure (8) is expanded by inputting pressurized oil into the oil inlet (6).

7. A reserved small shaft for filling and air return with a telescopic sleeve structure according to claim 1, characterized in that, The base (1) is welded by a prefabricated cylinder of different specifications and a frustum of a cone.

8. A construction method for a filling and return air reserved small shaft with a telescopic sleeve structure according to any one of claims 1-7, characterized in that, It includes the following steps: Step 1: Place the base and the telescopic sleeve structure: Fix the base (1) at the position of the reserved filling shaft in the stope to be filled, and then place the telescopic sleeve structure (8) aligned on the base (1); Step 2: Connect the base and the telescopic sleeve structure: Connect the telescopic sleeve structure (8) and the base (1) by using the quick coupling module (2) of the connection system. Then fix the pressing module (4) on the interface ring (2-3) to make the interface ring (2-3) dock and lock to form a pressing structure. The quick connection boss (3) generates a pre-tightening force under the action of the pressing module (4) to press the upper module (2-1) and the lower module (2-2) to increase the sealing performance; Step 3: Expand the telescopic sleeve structure: Convey the oil fluid to the oil inlet (6), and the oil fluid flows through the oil holes (15) to make the telescopic sleeve structure (8) expand level by level, and finally form the filling return air shaft (11).

Images