CN212671821U - Pneumatic flexible underground mine stope roof pillar - Google Patents

Abstract

The utility model relates to a pneumatic telescopic underground mine stope roof support, wherein a base is fixedly provided with a third-level column which is connected with an inflation joint; the third-stage column is sleeved with a second-stage column, the second-stage column is sleeved with a first-stage column, and inner cavities of the third-stage column, the second-stage column and the first-stage column are communicated with an inflation connector; the top end of the primary column is connected with the rock tray. The device has the advantages of low cost, small overall dimension, high construction efficiency, no need of an additional power device, capability of accurately setting the pre-jacking force, no attenuation and no deflection failure for a long time and the like. The support is particularly suitable for being used as a metal and nonmetal hard rock underground mine stope roof support.

Description

Pneumatic flexible underground mine stope roof pillar

Technical Field

The utility model relates to an underground mine stope roof pillar especially relates to a pneumatic telescopic underground mine stope roof pillar. The method is mainly used for roof support of metal and nonmetal hard rock underground mine stopes.

Background

The roof of the metal and nonmetal hard rock underground mine stope usually has the hidden danger of caving. The roof strut that is commonly used at present is the hydraulic telescoping strut, and it mainly has following defect: firstly, the precision requirement is high, the processing is difficult, the failure rate is high, the manufacturing cost is high, the overall dimension is large, and the carrying is difficult. Secondly, the construction time of supporting is long, so that the operators can work under the top plate which is not supported for a long time, and roof fall accidents are easy to happen. And thirdly, power devices such as power supply cables and hydraulic stations need to be additionally equipped during supporting. Fourthly, the problems of uncontrollable pre-jacking force, attenuation along with time and the like exist. Fifth, there is also a problem that skew failure is liable to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome the defect of current hydraulic telescoping strut, provide a pneumatic flexible underground mine stope roof pillar, it has low cost, overall dimension is little, the efficiency of construction is high, need not be equipped with extra power device, can accurately set up in advance the characteristics of jacking force, long-time unattenuated, not crooked inefficacy.

The purpose of the utility model is realized through the following mode:

the utility model provides a pneumatic flexible underground mine stope roof strut, includes base and rock tray, its characterized in that: a third-stage column is fixedly arranged on the base and connected with an inflation joint; the third-stage column is sleeved with a second-stage column, the second-stage column is sleeved with a first-stage column, and inner cavities of the third-stage column, the second-stage column and the first-stage column are communicated with an inflation connector; the top end of the primary column is connected with the rock tray.

The primary column and the secondary column are respectively provided with a pneumatic pin mechanism of the primary column; the pneumatic pin mechanism of the stage column comprises a pneumatic pin cavity and a pneumatic pin limiting plug which are arranged in the side wall of the corresponding stage column, wherein the outer side of the pneumatic pin cavity is provided with internal threads, and the pneumatic pin limiting plug is meshed with the internal threads; the inner side of the cavity of the pneumatic pin is provided with an annular baffle; a corresponding pneumatic pin is arranged in the cavity of the pneumatic pin, the pneumatic pin comprises a cylindrical pin body and a bearing disc at the inner end of the cylindrical pin body, and the cylindrical pin body penetrates through the central hole of the pneumatic pin limiting plug; the cylindrical pin body is provided with an exhaust hole for connecting the air moving pin cavity with the atmospheric environment.

The lower end of the base is provided with three groups of screw rods and screw nuts which are mutually meshed through trapezoidal threads.

The utility model has the advantages of:

the utility model relates to a novelty, simple structure, behind the high-pressure air that air inflation joint switch-on underground mine stope rig used, under high-pressure air's effect, one-level post, second grade post stretch out fast, after one-level post, second grade post stretch out completely, one-level post pneumatic pin, second grade post pneumatic pin also stretch out fast under high-pressure air's effect, can prevent one-level post, second grade post withdrawal after stretching out. The utility model discloses a support the height, can further adjust using the moment spanner to rotate the lead screw bottom. The problem of uneven ground can also be solved through adjusting three screw rod, and different torques are applied to the screw rod through the torque wrench to reach different pre-jacking forces. The utility model has the advantages of low cost, overall dimension is little, and the efficiency of construction is high, need not be equipped with extra power device, can the accurate setting jacking force in advance, not attenuate and not crooked inefficacy for a long time. The support is particularly suitable for being used as a metal and nonmetal hard rock underground mine stope roof support.

Under high-pressure air's effect, one-level post, second grade post stretch out the back, and the pneumatic round pin of one-level post and the pneumatic round pin of second grade post also transversely stretch out to the outside fast under high-pressure air's effect, play the effect of blockking after stretching out, prevent that place level post whereabouts. That is to say, do not need very big pressure with first grade post and second grade post jack-up, and the roof pillar does not need atmospheric pressure effect at the supporting roof in-process, does not have the pressurize problem. Therefore, the device does not need precise air sealing among the components, and has lower manufacturing cost.

Drawings

Fig. 1 is a schematic structural shape diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a stage column pneumatic pin mechanism according to an embodiment of the present invention.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1, the embodiment of the utility model provides a pneumatic flexible underground mine stope roof pillar, including one-level post 1, one-level post pneumatic pin 2, second grade post 3, second grade post pneumatic pin 4, tertiary post 5, inflatable joint 6, base 7, screw 8 and screw 9. The top end of the primary column 1 is provided with a rock tray 11, and the rock tray 11 plays a role in supporting rocks. The first-stage column 1 is arranged in the second-stage column 3 and can upwards extend out of the second-stage column 3 under the action of high-pressure air, and the second-stage column 3 is arranged in the third-stage column 5 and can upwards extend out of the third-stage column 5 under the action of high-pressure air. A base 7 is welded at the bottom of the three-level column 5, three spiral nuts 8 are welded at the lower portion of the base 7, a spiral screw rod 9 is meshed with the spiral nuts 8 through trapezoidal threads, the bottom of the spiral screw rod 9 is a spiral screw rod bottom end 10, and the spiral screw rod bottom end 10 is in a hexagonal prism shape and used for being in contact with the ground. The lower end of the third-level column 5 is provided with an air charging connector 6, and high-pressure air enters the inner cavities of the first-level column 1, the second-level column 3 and the third-level column 5 from the air charging connector 6.

The primary column pneumatic pin 2 and the matching mechanism thereof, and the secondary column pneumatic pin 4 and the matching mechanism thereof have the same structure and are collectively called a primary column pneumatic pin mechanism. The structure and the working principle of the primary column pneumatic pin mechanism will be described by taking the primary column pneumatic pin 2 and the matching mechanism thereof as an example. As shown in figure 2, a pneumatic pin cavity 12 is formed in the side wall of the primary column 1, internal threads 13 are formed on the outer side of the pneumatic pin cavity 12, and a pneumatic pin limiting screw plug 14 is meshed with the internal threads 13 to prevent the pneumatic pin from being separated. Inside the pneumatic pin cavity 12 there is an annular baffle 16. The primary column pneumatic pin 2 is installed in the pneumatic pin cavity 12, the primary column pneumatic pin 2 comprises a cylindrical pin body and a bearing disc at the inner end of the cylindrical pin body, the cylindrical pin body penetrates through a center hole of the pneumatic pin limiting screw plug 14, the bearing disc enables the primary column pneumatic pin 2 to move outwards in a whole transverse direction after being acted by air pressure in the primary column cavity, and the cylindrical pin body extends outwards to prevent the primary column 1 from falling, as shown in fig. 1. The cylindrical pin body is provided with an exhaust hole 15 for connecting the pneumatic pin cavity 12 with the atmospheric environment, and when the primary cylinder pneumatic pin 2 integrally moves outwards transversely, the exhaust hole is used for exhausting gas in the pneumatic pin cavity 12.

The utility model discloses a theory of operation is: after 6 switch-on high-pressure air that the stope rig was used commonly of inflatable joint, under high-pressure air's effect, one-level post 1, second grade post 3 stretches out fast (second grade post 3 upwards stretches out the tractive that relies on one-level post 1 from tertiary post 5 the inside), when one-level post 1, second grade post 3 stretches out the back completely, one-level post pneumatic pin 2, second grade post pneumatic pin 4 also transversely stretches out to the outside fast under high-pressure air's effect, play the effect of blockking after stretching out, prevent place level post whereabouts, prevent one-level post 1 promptly, second grade post 3 withdrawal.

Use torque wrench to rotate the screw rod bottom 10 and can further extend the utility model discloses a "pneumatic flexible underground mine stope roof pillar", can adjust three screw rod 9 respectively according to the ground height condition to solve the uneven problem in ground height, reach different jacking force in advance when applying for screw rod 9 different moments of torsion realization "a pneumatic flexible underground mine stope roof pillar" through torque wrench.

When the roof pillar is required to be contracted, only the first-stage column pneumatic pin 2 and the second-stage column pneumatic pin 4 are required to be pressed into the inner cavities of the first-stage column 1 and the second-stage column 3 respectively by using tools, the roof pillar contracts by itself under the action of gravity, and normal-pressure air in the roof pillar is discharged into the atmosphere through the air inflation connector 6.

Claims (3)

1. The utility model provides a pneumatic flexible underground mine stope roof strut, includes base (7) and rock tray (11), its characterized in that: a third-stage column (5) is fixedly arranged on the base (7), and the third-stage column (5) is connected with an inflation joint (6); the third-stage column (5) is sleeved with the second-stage column (3), the second-stage column (3) is sleeved with the first-stage column (1), and inner cavities of the third-stage column (5), the second-stage column (3) and the first-stage column (1) are communicated with the inflation connector (6); the top end of the primary column (1) is connected with the rock tray (11).

2. The pneumatic telescoping underground mine stope roof strut as claimed in claim 1, wherein: the primary column (1) and the secondary column (3) are respectively provided with a pneumatic pin mechanism of the primary column; the pneumatic pin mechanism of the stage column comprises a pneumatic pin cavity and a pneumatic pin limiting plug which are arranged in the side wall of the corresponding stage column, wherein the outer side of the pneumatic pin cavity is provided with internal threads, and the pneumatic pin limiting plug is meshed with the internal threads; the inner side of the cavity of the pneumatic pin is provided with an annular baffle; a corresponding pneumatic pin is arranged in the cavity of the pneumatic pin, the pneumatic pin comprises a cylindrical pin body and a bearing disc at the inner end of the cylindrical pin body, and the cylindrical pin body penetrates through the central hole of the pneumatic pin limiting plug; the cylindrical pin body is provided with an exhaust hole for connecting the air moving pin cavity with the atmospheric environment.

3. The pneumatic telescoping underground mine stope roof strut according to claim 1 or 2, wherein: the lower end of the base (7) is provided with three groups of screw rods (9) and screw nuts (8) which are meshed with each other through trapezoidal threads.

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