CN217270215U - Reserved filling air return false tunnel structure - Google Patents

Abstract

The utility model discloses a reserve and fill false gallery structure of return air belongs to the mining field, has solved the problem that false gallery easily takes place the pucking, rib, roof fracture slump. The utility model discloses be equipped with steel cylinder and a plurality of support rack in the false gallery, a plurality of support racks are arranged along false gallery length direction, and the steel cylinder is located and is supported the rack, and steel cylinder bottom both sides are equipped with the log respectively, and the log supports between the steel cylinder and support rack, and steel cylinder both sides and top are equipped with outer vaulting pole respectively, and outer vaulting pole supports between steel cylinder and false gallery inner wall. The utility model discloses set up the steel cylinder in false gallery, after the middle section volume of ore deposit of vice middle section service has been exploited, carry out the packing of false gallery in the steel cylinder outside, the steel cylinder is inside then to form hollow passageway and keep as the return airway, and the steel cylinder does not demolish after the packing, directly regards as the permanent of reserving the roadway passageway to strut. The utility model discloses simple structure can realize the modularization installation, and the construction is simple, the engineering volume is little, the windage coefficient is little, with low costs, and the practicality is strong.

Description

Reserved-filling air-return false tunnel structure

Technical Field

The utility model belongs to the mining field, concretely relates to reserve and fill false gallery structure of return air in downward consolidated fill mining method.

Background

At present, due to complex mining conditions, research on mining methods with high ore body grade and poor stability of ore bodies and surrounding rocks is less, in order to improve ore recovery rate and reduce dilution rate in recent years, the downward drift cemented filling mining method is used as a safe and effective mining technology and is more and more widely applied.

When the downward horizontal layered filling mining method is adopted for mining, a series of roadways are excavated at certain heights along the inclination of ore bodies to facilitate air return and filling operation and are used as the middle section of a filling air return pair. The main engineering of the auxiliary middle section comprises the engineering of a pulse-through return air duct, a return air shaft, a horizontal return air shaft connecting duct, a filling connecting duct, a pulse-along return air duct, a reserved filling return air duct in a pulse, a drilling chamber, a substation, a filling pulse-along duct and the like. An auxiliary middle section is generally responsible for the stoping operation of a middle section, and when the middle section mine volume served by the auxiliary middle section is mined, the auxiliary middle section is also filled completely. However, the air return duct in the auxiliary middle section still needs to be reserved, the air return duct is reserved in a reserved mode, and a reserved roadway channel is called a false tunnel. The false tunnel under the mine is arranged in the direction of the ore body and along the direction of the ore body in a multi-vertical mode and communicated with each other, and the false tunnel, the ventilation shaft and the filling shaft jointly form a filling air return channel of the mine.

The false tunnel is a key project reserved in the middle section of the mine auxiliary, the tunnel is seriously deformed and the temperature of a stope is increased along with the increase of the mining depth, and the false tunnel is used as an underground filling, air returning and safe escape passage, so that the stability and the reliability of the false tunnel are particularly important. During the production process, surrounding rocks at the position where the air return duct is filled are broken, joints are developed, and when the ground stress is increased, the false tunnel generates bottom bulging, rib spalling and top plate cracking and collapse, so that the normal production of mines is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a reserve and fill false gallery structure of return air to solve the problem that false gallery easily takes place the pucking, rib, roof fracture slump.

The technical scheme of the utility model is that: the utility model provides a reserve and fill false gallery structure of return air, is equipped with steel cylinder and a plurality of support rack in false gallery, and a plurality of support racks are arranged along false gallery length direction, and the steel cylinder is located the support rack, and steel cylinder bottom both sides are equipped with the log respectively, and the log supports between steel cylinder and support rack, and steel cylinder both sides and top are equipped with outer vaulting pole respectively, and outer vaulting pole supports between steel cylinder and false gallery inner wall.

As a further improvement, the steel cylinder is internally provided with a plurality of groups of internal supporting mechanisms which are arranged along the axial direction of the steel cylinder, and the internal supporting mechanisms are supported on the inner wall of the steel cylinder.

As a further improvement, the inner supporting mechanism of each group is composed of two mutually perpendicular inner supporting rods, and the inner supporting rods are radially arranged along the steel cylinder.

As a further improvement of the utility model, a plurality of supporting shed frames are connected into a whole through a wood board.

As a further improvement of the utility model, a first nail is arranged between the log and the supporting shed frame.

As a further improvement of the utility model, the included angle between the upper plane and the side surface of the supporting shed frame is 90-95 degrees, and a second cramp is arranged between the upper plane and the side surface.

As a further improvement of the utility model, the steel cylinder is composed of a plurality of steel cylinder units connected end to end.

As a further improvement of the utility model, the steel cylinder unit is formed by mutually enclosing and connecting four circular arc steel plates.

The beneficial effects of the utility model are that: the utility model discloses set up the steel cylinder in false gallery, after the middle section volume of ore mining that vice middle section was served has been exploited, carry out the packing of false gallery in the steel cylinder outside, the steel cylinder is inside then to form hollow passageway and keep as the return airway, and the steel cylinder does not demolish after the packing, directly regards as the permanent support of reserving the roadway passageway. The steel cylinder unit is enclosed by prefabricated circular arc steel sheet and closes to form, and the steel cylinder unit connects into the steel cylinder head and the tail again, simple to operate, and inside and outside all have fine support, and stability is good for the steel cylinder. The utility model discloses simple structure can realize the modularization installation, and the construction is simple, the engineering volume is little, the windage coefficient is little, with low costs, and the practicality is strong.

Drawings

Fig. 1 is a schematic structural view of a reserved and filled return air false tunnel structure of the present invention;

FIG. 2 is a view A-A of FIG. 1;

FIG. 3 is a schematic structural diagram of a steel cylinder unit in the present invention;

fig. 4 is a schematic side view of the steel cylinder of the present invention.

In the figure: 1-arc steel plate; 2-end angle steel; 3-side angle steel; 4-connecting holes; 5-a steel cylinder; 51-a steel cylinder unit; 6-false tunnel; 7-reinforcing steel bars; 8-supporting the shed frame; 81-upper plane; 82-side; 9-log; 10-outer stay bar; 11-inner brace rod; 12-a metal mesh; 13-hanging a rib; 14-wood board; 15-first staple; 16-second staple.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples 1,

The utility model provides a reserve and fill false gallery structure of return air, be equipped with steel cylinder 5 and a plurality of support rack 8 in false gallery 6, a plurality of support rack 8 are arranged along 6 length direction in false gallery, steel cylinder 5 is located and supports rack 8, 5 bottom both sides of steel cylinder are equipped with log 9 respectively, log 9 supports between steel cylinder 5 and support rack 8, 5 both sides of steel cylinder and top are equipped with outer vaulting pole 10 respectively, outer vaulting pole 10 supports between steel cylinder 5 and the 6 inner walls in false gallery.

A plurality of groups of internal supporting mechanisms are arranged in the steel cylinder 5 and are arranged along the axial direction of the steel cylinder 5, and the internal supporting mechanisms are supported on the inner wall of the steel cylinder 5.

Each group of internal stay mechanisms consists of two internal stay bars 11 which are vertical to each other, and the internal stay bars 11 are arranged along the radial direction of the steel cylinder 5.

The plurality of supporting shelves 8 are connected into a whole through wood plates 14.

A first cramp 15 is arranged between the log 9 and the supporting shed frame 8.

An included angle alpha between an upper plane 81 of the supporting shed frame 8 and a side surface 82 is 90-95 degrees, and a second cramp 16 is arranged between the upper plane 81 and the side surface 82.

A metal net 12 is laid on the bottom plate of the false tunnel 6, a plurality of hanging ribs 13 are arranged in the false tunnel 6, the upper ends of the hanging ribs 13 are connected with the top plate of the false tunnel 6, and the lower ends of the hanging ribs 13 are connected with the metal net 12.

The steel cylinder 5 is formed by connecting a plurality of steel cylinder units 51 end to end.

The steel cylinder unit 51 is formed by mutually enclosing and connecting four arc steel plates 1. And a reinforcing steel bar 7 is arranged between the two ends of the circular arc steel plate 1 to enhance the shaping of the circular arc steel plate 1.

The construction method comprises the following steps:

A. leveling the bottom plate of the false tunnel 6, laying a metal net 12 on the bottom plate, and drilling an anchor rod hole on the top plate of the false tunnel 6;

B. a plurality of supporting shed frames 8 are arranged along the length direction of the false tunnel 6, and the supporting shed frames 8 are made of wood;

C. a plurality of steel cylinder units 51 are arranged on the support shed frame 8 and connected end to end into steel cylinders 5 through screw nuts;

D. the inside and the outside of the joint of the steel cylinder 5 are plastered tightly and leveled by cement mortar, and plastic cloth and woven bags are wrapped outside to prevent dust leakage;

E. the two sides and the top of the steel cylinder 5 are fixed by outer support rods 10 (made of square timber) to prevent the steel cylinder 5 from deviating; the interior of the steel cylinder 5 is fixed by an inner brace 11 (adopting square timber) to prevent the steel cylinder 5 from collapsing;

F. round timbers 9 are placed on two sides of the bottom of the steel cylinder 5, the round timbers 9 are fixed on the supporting shed frames 8 by first cramps 15, and the supporting shed frames 8 are connected into a whole by wood plates 14;

G. and hanging a hanging rib 13, wherein the upper end of the hanging rib 13 is connected with the top plate of the false tunnel 6, and the lower end of the hanging rib 13 is connected with the metal net 12.

The wall thickness of the arc steel plate 1 is 6mm, side angle steel 3 is welded on two side edges of the arc steel plate 1, connecting holes 4 are formed in the side angle steel 3, and the 4 arc steel plates 1 are connected with screw nuts through the connecting holes 4 in the side angle steel 3 to form a steel cylinder unit 51. The two ends of the arc steel plate 1 are welded with end part angle steels 2, connecting holes 4 are formed in the end part angle steels 2, the interval angles of the connecting holes 4 in the end part angle steels 2 are 30 degrees, and a plurality of steel cylinder units 51 are connected end to end and then connected into steel cylinders 5 through the connecting holes 4 in the end part angle steels 2 and screw nuts.

The construction of the false excavation 6 is generally to ensure the filling and ventilation requirements for the subsequent mining of the mine and may be within the vein or outside the vein.

During filling, the false tunnel 6 is filled outside the steel cylinder 5, and a hollow channel is formed inside the steel cylinder 5 and reserved as an air return channel. After filling, the steel cylinder 5 is directly used as a permanent support of a reserved roadway channel without being dismantled, the inner stay bar 11 can be recycled after the false tunnel 6 is exposed, and the outer stay bar 10 is not recycled.

Claims (8)

1. The utility model provides a reserve and fill pseudo gallery structure of return air which characterized in that: be equipped with steel cylinder (5) and a plurality of support rack (8) in false gallery (6), a plurality of support racks (8) are arranged along false gallery (6) length direction, steel cylinder (5) are located and are supported rack (8), steel cylinder (5) bottom both sides are equipped with log (9) respectively, log (9) support between steel cylinder (5) and support rack (8), steel cylinder (5) both sides and top are equipped with outer vaulting pole (10) respectively, outer vaulting pole (10) support between steel cylinder (5) and false gallery (6) inner wall.

2. The pseudo tunnel structure of reserved filling return air as claimed in claim 1, wherein: the steel cylinder (5) is internally provided with a plurality of groups of internal supporting mechanisms which are arranged along the axial direction of the steel cylinder (5), and the internal supporting mechanisms are supported on the inner wall of the steel cylinder (5).

3. A reserve air return pseudo-tunnel structure as claimed in claim 2, wherein: each group of internal stay mechanisms consists of two internal stay bars (11) which are vertical to each other, and the internal stay bars (11) are arranged along the radial direction of the steel cylinder (5).

4. A reserve air return pseudo-tunnel structure as claimed in claim 3, wherein: the plurality of supporting shed frames (8) are connected into a whole through wood plates (14).

5. The reserve-filled return air pseudo-tunnel structure according to claim 4, wherein: a first cramp (15) is arranged between the log (9) and the supporting shed frame (8).

6. The reserve-filled return air pseudo-tunnel structure according to claim 5, wherein: an included angle between the upper plane (81) and the side surface (82) of the supporting shed frame (8) is 90-95 degrees, and a second cramp (16) is arranged between the upper plane (81) and the side surface (82).

7. The structure of any one of claims 1 to 6, wherein: the steel cylinder (5) is formed by connecting a plurality of steel cylinder units (51) end to end.

8. A reserve fill return air pseudo-tunnel structure as claimed in claim 7, wherein: the steel cylinder unit (51) is formed by mutually enclosing and connecting four arc steel plates (1).

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