Mine roadway air return device

Abstract

The utility model discloses a mine roadway air return device which comprises a roadway and a supporting structure of the roadway. The supporting structure comprises a support consistent with the inner wall of the roadway in shape, and an air return barrel is fixed to the bottom of a stand column of the support through a connecting plate. A supporting structure which is arranged in the air return barrel in the axial direction of the barrel body in a full-length mode is arranged in the air return barrel. The supporting structure comprises a cross-shaped supporting structure located in the center of the barrel body, a vertical supporting plate attached to the barrel wall and parallel to the support stand column, and a horizontal supporting plate at the bottom of the barrel body. The vertical supporting plate and the horizontal supporting plate intersect to form a right triangle supporting area. The utility model solves the problems that the normal ventilation cannot be kept after the caving of the roadway below the chamber, the caving cannot be quickly responded, the recovery time of the roadway is long, and the cost is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to mining engineering technical field, concretely relates to a kind of roadway return air device capable of guaranteeing roadway collapse normal ventilation. BACKGROUND

[0002] Chamber as the key auxiliary facilities under the mine, mainly for equipment installation, material storage, tool storage and as repair shop, explosives store, rest room and other special function space.Chamber is usually located underground, with the characteristics of large cross section, short length, and not directly with the surface.Chamber and the structure design between mine roadway is crucial to ensure the normal production and safe operation of mine.Chamber and the surrounding rock between roadway often because of the joint fissure development of rock and disturbance such as slope, and instability leads to roadway and above chamber collapse through.The roadway collapse not only directly affects the ventilation system of mine, aggravates the accumulation of harmful gases, and then deteriorates the working environment, reduces production efficiency, and poses a serious threat to the safety of workers.

[0003] The existing roadway support structure often cannot guarantee normal ventilation after collapse, which leads to the inability to quickly respond and handle the collapse accident.In addition, the recovery of roadway under chamber mainly depends on traditional grouting technology, but the time is long and the cost is high. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of mine roadway return air device, its purpose is: solve the problem that roadway under chamber cannot maintain normal ventilation after collapse, cannot quickly respond to collapse and roadway recovery time is long, cost is high.

[0005] The utility model technical scheme is as follows:

[0006] A kind of mine roadway return air device, including roadway and its support structure, the support structure includes the bracket consistent with the shape of roadway inner wall, the column bottom of the bracket is fixed with return air barrel by connecting plate, the return air barrel is equipped with the support structure along the axial length arrangement, the support structure includes the cross support structure in the barrel body center, the vertical support plate that is arranged and parallel with the support column of bracket and is stuck to barrel wall, and the horizontal support plate of barrel body bottom, the vertical support plate and horizontal support plate form right triangle support area by intersection.

[0007] Further, the top surface of the connecting plate is provided with upwardly extending support plate, and the support plate and the ear plate on the outer sidewall of the return air barrel are connected by bolts.

[0008] Further, the return air barrel is a truncated cone structure with a taper angle of 15-25°, and the small-diameter end is connected with the air source, and the large-diameter end extends towards the direction of the roadway.

[0009] Further, the support structure adopts a whole forming process.

[0010] Further optionally, the cross support structure is a plurality of groups of intersecting fixed stainless steel pipes arranged along the barrel axial direction.

[0011] Optionally, the cross support structure is welded with the barrel.

[0012] Optionally, the cross support structure is bolted with the barrel.

[0013] Compared with the prior art, the utility model has the following positive effects:

[0014] (1) By the conical air return barrel fixed at the support column bottom, the air flow is more effectively guided, the ventilation efficiency after collapse is improved, the mine internal air quality is ensured, and a safer and more comfortable working environment is provided for workers. Further, the air return barrel is arranged at one side of the roadway bottom, the ventilation effect is ensured, and the roadway traffic is not affected. Since the air return barrel is installed at the roadway bottom close to the roadway side wall position, the part is easy to form a triangular space, the structure is firm, is not easy to collapse, the impact force received during collapse is smaller, and the damage degree of the air return barrel by the roadway collapse can be greatly reduced.

[0015] (2) By arranging the cross support structure and the vertical support plate and the horizontal support plate along the barrel axial length direction interval in the air return barrel, the right triangle area between the support column and the connecting plate after the roadway collapse can still be the effective ventilation space. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the utility model embodiment schematic diagram;

[0017] Figure 2 It is Figure 1 The A node local amplification diagram in the utility model;

[0018] Figure 3 It is the utility model air return barrel structure schematic diagram.

[0019] Mark explanation:

[0020] 1, roadway; 2, chamber; 3, support; 3-1, connecting plate; 3-2, support plate; 4, air return barrel; 4-1, cross support structure; 4-2, vertical support plate; 4-3, horizontal support plate; 4-4, ear plate. DETAILED DESCRIPTION

[0021] The technical scheme and technical effect of the utility model will be described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0022] AsFigure 1 The mine roadway return air device comprises a roadway and a support structure thereof, the support structure comprises a support 3 consistent with the shape of the inner wall of the roadway, and the support 3 comprises a stand column, and a return air barrel 4 is fixed to the bottom of the stand column. The return air barrel 4 is fixed to the bottom of the support 3, so that the damage rate of the return air barrel 4 can be greatly reduced, normal ventilation of the roadway is ensured, and accumulation of harmful gas is prevented.

[0023] The roadway adopts a straight wall and semicircular arch roadway, and specifically, the support structure further comprises anchor rods and anchor cables arranged at intervals on the top of the roadway, the anchor rods are uniformly distributed on both sides of the roadway, the distance between the anchor rods and the anchor cables is 800-1000 mm, and the distance between the anchor rods is 800-1000 mm. The support 3 comprises stand columns on the left and right sides, the top ends of the two stand columns are connected with a semicircular arch support, and an anchor net is further fixed between the support 3 and the roadway.

[0024] Preferably, the anchor rod is a resin anchor rod.

[0025] As Figure 2 The bottom of the support 3 is fixed with a connecting plate 3-1, and the top surface of the connecting plate 3-1 is provided with a support plate 3-2 extending upward.

[0026] Specifically, as Figure 3 The return air barrel 4 is fixed with the support plate 3-2 through the lug plate 4-4 fixed to the outer side wall thereof. The return air barrel 4 is internally provided with a support structure arranged at intervals along the axial direction, which is used for bearing the main pressure load and improving the overall rigidity and strength.

[0027] The support structure comprises a cross support structure 4-1 located at the center of the barrel body, a vertical support plate 4-2 arranged in close contact with the barrel wall and parallel to the stand column of the support 3, and a horizontal support plate 4-3 at the bottom of the barrel body, and the vertical support plate 4-2 and the horizontal support plate 4-3 intersect to form a right-angled triangle support area. When the roadway collapses, the right-angled support system maintains structural integrity through a stress dispersion mechanism, ensures that the return air barrel 4 always has an effective ventilation cross section ≥0.6 m² in the impact deformation working condition, and makes the roadway ventilation volume maintain in the safety threshold range of 15-20 m³ / s.

[0028] Preferably, the support structure adopts an integral forming process to reduce welding and connection parts and improve the integrity and reliability of the structure.

[0029] Optionally, in order to provide good bending resistance while reducing weight, the cross support structure 4-1 is a plurality of groups of intersecting fixed stainless steel pipes arranged at intervals along the axial direction of the barrel body, which helps to improve the stability and durability of the overall structure of the return air barrel 4, especially in the dynamic environment of the mine roadway, the hollow stainless steel support structure can effectively resist external pressure and impact and reduce structural deformation.

[0030] Optionally, the support structure is detachable, and the end thereof is fixed to the inner wall of the return air barrel 4 by a bolt. The reliability of the connecting part is ensured when subjected to impact, and the support structure is prevented from being displaced or falling off.

[0031] Further, in order to improve the ventilation efficiency, the return air barrel 4 is a truncated conical structure with a taper angle of 15-25°, the small-diameter end of which is connected to the air source, and the large-diameter end thereof extends towards the direction of the roadway. The return air barrel 4 with a moderate diameter helps to optimize the distribution of air flow and improve the ventilation efficiency. In the embodiment, the diameter of the return air barrel 4 is 1-2 m, and preferably 1.5 m.

[0032] Further, the return air barrel 4 is connected to the air source by a glass fiber reinforced plastic air pipe which is pre-buried 1-2 m below the floor, so that the ventilation system can still work normally after the roadway collapses.

[0033] The following illustrates the supporting method of the embodiment of the utility model:

[0034] When supporting after the roadway collapses, first, the resin anchor rod, anchor cable and metal mesh are used to reinforce the surrounding rock of the roadway, then the support 3 is erected along the strike of the roadway, the connecting plate 3-1 is horizontally fixed to the bottom end of the column of the support 3, the support plate 3-2 is vertically fixed to the top surface of the connecting plate 3-1 away from the column, then the return air barrel 4 is placed in the reserved position between the support plate 3-2 and the column, and the lug plate 4-4 is connected to the support plate 3-2 by a bolt. Since grouting is not required, the construction time is greatly shortened. This scheme greatly simplifies the construction process and can quickly restore the roadway.

[0035] The return air barrel 4 is arranged at one side of the bottom of the roadway, which does not affect the traffic of the roadway while ensuring the ventilation effect. When the roadway collapses, since the return air barrel 4 is not traditionally hoisted but fixed to the position close to the sidewall of the roadway at the bottom of the roadway, the position is easy to form a triangular space, the structure is firm and not easy to collapse, the impact force received during the collapse is small, and the damage rate of the return air barrel 4 during the collapse of the roadway can be greatly reduced. Moreover, the support structure capable of bearing a larger load is arranged in the return air barrel 4, so that the structure is not easy to deform under a great impact, thereby ensuring that the return air barrel 4 can normally ventilate after the roadway collapses and the harmful gas is not accumulated, so as to greatly shorten the recovery time and downtime of the roadway and greatly reduce the production cost.

[0036] It should be noted that, for those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. The scope of the utility model is defined by the claims rather than the above description.

Claims

1. A mine roadway return air device, comprising a roadway and a support structure thereof, the support structure comprising a bracket (3) consistent with the shape of the inner wall of the roadway, characterized in that: The column bottom of the support (3) is fixed with a return air bucket (4) through a connecting plate (3-1), the return air bucket (4) is internally provided with a support structure arranged along the axial length, the support structure comprises a cross support structure (4-1) located at the center of the bucket body, a vertical support plate (4-2) abutting against the bucket wall and parallel to the column of the support (3), and a horizontal support plate (4-3) at the bottom of the bucket body, the vertical support plate (4-2) and the horizontal support plate (4-3) intersect to form a right-angled triangle support area.

2. A mine roadway air return device as claimed in claim 1, characterised in that: The top surface of the connecting plate (3-1) is provided with an upward extending support plate (3-2), the support plate (3-2) is connected with the lug plate (4-4) on the outer side wall of the return air bucket (4) through a bolt.

3. The mine roadway air return device of claim 1, wherein: The return air bucket (4) is a truncated cone structure with a taper angle of 15-25°, the small diameter end is connected with the air source, and the large diameter end extends towards the roadway extension direction.

4. The mine roadway air return of claim 1, wherein: The support structure adopts an integral forming process.

5. The mine roadway air return of claim 1, wherein: The cross support structure (4-1) is a plurality of groups of intersecting fixed stainless steel pipes arranged along the axial direction of the bucket body.

6. A mine roadway air return device as claimed in claim 5 wherein: The cross support structure (4-1) and the bucket body are welded.

7. A mine roadway air return device as claimed in claim 5 wherein: The cross support structure (4-1) and the bucket body are bolted.

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