Gob-side entry retaining pier column and supporting system

Abstract

The utility model discloses a gob-side entry retaining pier stud and a supporting system, and belongs to the technical field of gob-side entry retaining supporting, the gob-side entry retaining pier stud comprises a base, a double telescopic stand column, a top seat and a control valve group, the supporting system comprises a plurality of groups of gob-side entry retaining pier studs, and a steel beam is arranged on the top surface of each group of gob-side entry retaining pier studs. A tie rod is arranged between every two adjacent sets of gob-side entry retaining pier studs, and a liquid inlet pipeline and a liquid return pipeline are connected between every two adjacent sets of gob-side entry retaining pier studs. The height of the pier column meets the requirement for the height of a retained roadway support, the working resistance is high, and the roof cutting effect in a retained roadway dynamic pressure area is remarkable; the pier column adopts a double-telescopic stand column without a movable column liquid inlet, the number of rubber pipes is reduced, and carrying operation is convenient; the base is in spherical hinge connection with the double-telescopic stand column, and base open welding caused by bottom heaving of the entry retaining area is avoided; the pier column is provided with a liquid supply main pipeline control ball valve, so that a liquid supply pipeline is convenient to lay; the coal mine grabbing and lifting truck is used for achieving mechanical carrying of the pier columns, labor intensity is reduced, the automation degree is improved, manpower is saved, and safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to along empty lane retaining support technical field especially, it relates to a kind of along empty lane retaining pier column and supporting system. BACKGROUND

[0002] Along empty lane retaining, it is a crossheading of last working face with special support mode and is strengthened support, and as the crossheading of next replacement working face, along empty lane retaining realizes no coal pillar mining, reduces roadway excavation quantity, relieves working face replacement tense problem, greatly improves coal mining rate and safety.

[0003] Current along empty lane retaining support mode, there is single hydraulic prop, unit support and portal support and other support forms, there is low work resistance, poor lane retaining effect, large roadway space occupation, inconvenient to move, high labor intensity of personnel, poor safety and other problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of along empty lane retaining pier column and supporting system, solve the low work resistance of current along empty lane retaining support mode, poor lane retaining effect, large roadway space occupation, inconvenient to move, high labor intensity of personnel, poor safety problem.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The utility model discloses a kind of along empty lane retaining pier column, including base, the top of the base is provided with double telescopic column, the top of the double telescopic column is provided with base, control valve group is provided on the double telescopic column.

[0007] Further, the bottom surface of the base is provided with first mounting hole.

[0008] Further, the double telescopic column includes outer cylinder, the inside of the outer cylinder is provided with middle cylinder, the inside of the middle cylinder is provided with live column, the inside of the middle cylinder is provided with intermediate liquid pipe, the bottom end of the intermediate liquid pipe is connected with the bottom of the middle cylinder, the top end of the intermediate liquid pipe extends to the inside of the live column, the bottom of the middle cylinder is provided with bottom valve, the lower part of the outer cylinder is provided with first liquid inlet passage and liquid discharge passage, the upper part of the outer cylinder is provided with second liquid inlet passage, the bottom end of the outer cylinder is provided with ball head, the outside of the outer cylinder is provided with the control valve group.

[0009] Further, the top of the base is provided with ball seat matched with the ball head.

[0010] Further, the control valve group comprises a reversing valve, a column valve, a large-flow safety valve and an inlet and outlet ball valve, the column valve is arranged on the first liquid inlet channel, the large-flow safety valve is arranged on the liquid outlet channel, the inlet and outlet ball valve is arranged on the outer wall of the outer cylinder, and the reversing valve is arranged on the outer side of the outer cylinder.

[0011] Further, the side surface of the top base is provided with a pull connection hole.

[0012] Further, the top surface of the top base is provided with a second mounting hole.

[0013] A support system for a gob-side entry retaining pier column utilizes the support system for a gob-side entry retaining pier column according to any one of the above, comprising a plurality of groups of gob-side entry retaining pier columns, the top surface of each group of the gob-side entry retaining pier columns is provided with a steel beam, a transverse pull rod is arranged between adjacent two groups of the gob-side entry retaining pier columns, and an inlet liquid pipeline and a return liquid pipeline are connected between the adjacent two groups of the gob-side entry retaining pier columns.

[0014] Further, each group of the gob-side entry retaining pier columns comprises two gob-side entry retaining pier columns.

[0015] Further, the steel beam is arranged as a π-shaped steel beam.

[0016] Compared with the prior art, the beneficial technical effects of the utility model are:

[0017] The height of the pier column meets the height requirement of entry retaining support, the working resistance is high, and the top cutting effect in the entry retaining 200m dynamic pressure area is remarkable; the pier column adopts a double telescopic column with no active column inlet, the number of rubber pipes is reduced, and the moving operation is facilitated; the base is a high-strength steel plate welding piece, the base is connected with the double telescopic column through a spherical hinge, and the base is prevented from being opened and welded due to the floor heave in the entry retaining area; the pier column is provided with a liquid supply main pipeline control ball valve, and the liquid supply pipeline laying in the entry retaining area is facilitated; the mechanized transportation of the pier column is realized by using a coal mine snatch lifting vehicle, the labor intensity of workers is reduced, the automation degree is improved, manpower is saved, and the safety of production operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described below in combination with the drawings.

[0019] Figure 1 It is a three-dimensional structure schematic view of the gob-side entry retaining pier column of the utility model;

[0020] Figure 2 It is another angle three-dimensional structure schematic view of the gob-side entry retaining pier column of the utility model;

[0021] Figure 3 It is a sectional view of the gob-side entry retaining pier column of the utility model;

[0022] Figure 4It is the three-dimensional structure schematic view of the along-void remaining roadway of the utility model;

[0023] Figure 5 It is the three-dimensional structure schematic view of the along-void remaining roadway pier column support system of the utility model;

[0024] Figure 6 It is the three-dimensional structure schematic view of the along-void remaining roadway pier column of the utility model of adjacent two groups;

[0025] Figure 7 It is the three-dimensional structure schematic view of the along-void remaining roadway pier column of the utility model of adjacent two groups from another angle.

[0026] Mark 1, base; 2, double telescopic column; 3, control valve group; 4, top seat; 5, steel beam; 6, horizontal pull rod; 7, liquid inlet pipeline; 8, liquid return pipeline;

[0027] 1-1, first mounting hole; 2-1, outer cylinder; 2-1-1, first liquid inlet passage; 2-1-2, liquid discharge passage; 2-1-3, second liquid inlet passage; 2-2, middle cylinder; 2-3, movable column; 2-4, intermediate liquid pipe; 2-5, bottom valve; 2-6, ball head; 3-1, reversing valve; 3-2, column valve; 3-3, large flow safety valve; 3-4, liquid inlet and return ball valve; 4-1, pull connection hole; 4-2, second mounting hole. Specific embodiments

[0028] As Figures 1-3 Indicated, a kind of along-void remaining roadway pier column, including base 1, the top of the base 1 is provided with double telescopic column 2, the top of the double telescopic column 2 is provided with top seat 4, control valve group 3 is arranged on the double telescopic column 2.

[0029] The double telescopic column 2 comprises an outer cylinder 2-1, a middle cylinder 2-2 is sealingly and slidably arranged in the inner part of the outer cylinder 2-1, a movable cylinder 2-3 is sealingly and slidably arranged in the inner part of the middle cylinder 2-2, an intermediate liquid pipe 2-4 is arranged in the inner part of the middle cylinder 2-2, the bottom end of the intermediate liquid pipe 2-4 is connected with the bottom of the middle cylinder 2-2, the top end of the intermediate liquid pipe 2-4 extends into the inner part of the movable cylinder 2-3, a bottom valve 2-5 is arranged at the bottom of the middle cylinder 2-2, a first liquid inlet channel 2-1-1 and a liquid discharge channel 2-1-2 are arranged at the lower part of the outer cylinder 2-1, the first liquid inlet channel 2-1-1 and the liquid discharge channel 2-1-2 are communicated with the lower cavity of the outer cylinder 2-1, a second liquid inlet channel 2-1-3 is arranged at the upper part of the outer cylinder 2-1, the second liquid inlet channel 2-1-3 is communicated with the upper cavity of the outer cylinder 2-1, an inclined flow guide channel is arranged at the bottom of the middle cylinder 2-2, one end of the flow guide channel is communicated with the intermediate liquid pipe 2-4, the other end of the flow guide channel is communicated with the lower cavity of the outer cylinder 2-1, a through hole is arranged on the outer wall of the bottom of the movable cylinder 2-3, the through hole is communicated with the upper cavity of the middle cylinder 2-2, the bottom valve 2-5 is a one-way valve, a protrusion 1-3 matched with the bottom valve 2-5 is connected with the bottom of the outer cylinder 2-1, when the middle cylinder 2-2 drops to the lowest position, the protrusion contacts with the bottom valve 2-5, reversely opens the bottom valve 2-5, and the emulsion returns, sliding sealing assemblies are arranged at the connecting parts of the outer cylinder 2-1, the middle cylinder 2-2 and the movable cylinder 2-3, the sliding sealing assemblies adopt the prior art, a ball head 2-6 is connected with the bottom end of the outer cylinder 2-1, and the control valve group 3 is arranged at the outer side of the outer cylinder 2-1.

[0030] The lifting column process: the emulsion enters into the lower cavity of the outer cylinder 2-1 through the first liquid inlet channel 2-1-1, drives the middle cylinder 2-2 to drive the movable cylinder 2-3 to rise together, stops when the middle cylinder 2-2 rises to the highest position, at this time, the bottom valve 5 is opened, the emulsion enters into the lower cavity of the middle cylinder 2-2, drives the movable cylinder 2-3 to rise, the movable cylinder 2-3 rises to the highest position and stops, and the whole lifting process of the double telescopic column 2 is completed.

[0031] The lowering column process: the emulsion enters into the upper cavity of the outer cylinder 2-1 through the second liquid inlet channel 2-1-3, drives the middle cylinder 2-2 to drive the movable cylinder 2-3 to drop together, the emulsion in the lower cavity of the outer cylinder 2-1 is discharged through the first liquid inlet channel 2-1-1, when the middle cylinder 2-2 drops to the lowest position, the protrusion 1-3 contacts with the bottom valve 5, opens the bottom valve 5, then the emulsion enters into the flow guide channel, the emulsion enters into the intermediate liquid pipe 2-4 through the flow guide channel, enters into the inner part of the movable cylinder 2-3 through the opening at the top end of the intermediate liquid pipe 2-4, then is communicated with the upper cavity of the middle cylinder 2-2 through the through hole, drives the movable cylinder 2-3 to drop, the emulsion in the lower cavity of the middle cylinder 2-2 is discharged from the first liquid inlet channel 1-1 through the bottom valve 5, the movable cylinder 2-3 drops to the lowest position and stops, and the whole lowering process of the double telescopic column 2 is completed.

[0032] Specifically, the double telescopic column is φ250mm / φ180mm, the total stroke is 1670mm, the support height range is 1800mm-3500mm, the initial support force is 1500kN, the working resistance is 1700kN, the double telescopic column adopts the structure without the active column liquid inlet nozzle, so that one active column rubber pipe for lowering the column can be reduced, and the SL4.04 bottom valve is arranged on the column.

[0033] The top of the base 1 is provided with a ball seat matched with the ball head 2-6; the base 1 is connected with the double telescopic column 2 in a ball head universal manner, and can adapt to the deformation of the floor heave of the roadway; the size of the base 1 is 700mm*500mm, the material is Q460, and the plate thickness is 30mm; a plurality of first mounting holes 1-1 are formed in the bottom surface of the base 1, if it is necessary to increase the bottom contact area, a larger floor can be installed below by using the first mounting hole 1-1; by forming the first mounting hole 1-1, the bottom contact area can be conveniently increased, and the problem of support sinking due to the softness of the roadway floor can be prevented.

[0034] The control valve group 3 includes a reversing valve 3-1, a column valve 3-2, a large-flow safety valve 3-3, and an inlet and return liquid ball valve 3-4; the column valve 3-2 is installed on the first liquid inlet channel 2-1-1; the large-flow safety valve 3-3 is installed on the liquid discharge channel 2-1-2; the main function of the large-flow safety valve 3-3 is to open when the system pressure exceeds the specified value, and the liquid discharge channel 2-1-2 is automatically opened to discharge the emulsion, so as to protect the system from accidents caused by excessive pressure; the large-flow safety valve 3-3 is a 500L large-flow safety valve; the inlet and return liquid ball valve 3-4 is installed on the outer wall of the outer cylinder 2-1; the reversing valve 3-1 is installed on the outer side of the outer cylinder 2-1 through a support; the number of the inlet and return liquid ball valves 3-4 is two; the inlet of the reversing valve 3-1 is communicated with the middle port of the upper inlet and return liquid ball valve 3-4; the return port of the reversing valve 3-1 is communicated with the middle port of the lower inlet and return liquid ball valve 3-4; the inlet of the reversing valve 3-1 is communicated with the first liquid inlet channel 2-1-1 through a pipeline; the return port of the reversing valve 3-1 is communicated with the second liquid inlet channel 2-1-3 through a pipeline; the upper inlet and return liquid ball valve 3-4 is communicated with the inlet and return liquid ball valve 3-4 on the adjacent column through the inlet pipeline 7; the lower inlet and return liquid ball valve 3-4 is communicated with the inlet and return liquid ball valve 3-4 on the adjacent column through the return pipeline 8; the reversing valve 3-1 is communicated with the inlet pipeline 7 and the return pipeline 8. In use, only the double telescopic column 2 of the outermost column is communicated with the liquid supply pipeline and the return pipeline of the fully mechanized working face.

[0035] The top seat 4 measures 600mm × 400mm, is made of Q460 steel, and has a plate thickness of 30mm. It is connected to the movable column 2-3 of the double telescopic column 2 via a pin. A second mounting hole 4-2 is provided on the top surface of the top seat 4 for easy installation of the net-breaking tool. A pull-in hole 4-1 is provided on the side of the top seat 4. Figure 7 As shown, the two ends of the horizontal tie rod 6 are connected to two adjacent tie holes 4-1.

[0036] A goaf-side retaining pillar support system utilizes the goaf-side retaining pillars described above to construct the support system, such as... Figures 4-7 As shown, it includes multiple sets of goaf retaining columns. Each set of goaf retaining columns includes two goaf retaining columns. A π-shaped steel beam 5 is placed on the top surface of the two goaf retaining columns in each set. A horizontal tie rod 6 is set between two adjacent sets of goaf retaining columns. The two ends of the horizontal tie rod 6 are connected to two adjacent tie holes 4-1. An inlet pipe 7 and a return pipe 8 are connected between two adjacent sets of goaf retaining columns.

[0037] The construction process of the pier support system for roadway clearance is as follows:

[0038] In coal mines, a grabber is used to hold the pier column tightly. The pier column is lowered, and the grabber moves the pier column forward to the placement position. Then, a steel beam 5 is installed on the top surface of the pier column, and the pier column is raised to complete the support. The pier column is moved in the same way as described above. The pier columns can be connected with special cross braces 6 as needed.

[0039] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A type of pier for leaving a roadway along a gap, characterized in that: Includes a base (1), the top of which is provided with a double telescopic column (2), the top of which is provided with a top seat (4), and a control valve group (3) is provided on the double telescopic column (2).

2. The goaf retaining column according to claim 1, characterized in that: The bottom surface of the base (1) is provided with a first mounting hole (1-1).

3. The pier for retaining space along the roadway according to claim 1, characterized in that: The double telescopic column (2) includes an outer cylinder (2-1), an inner cylinder (2-2) is provided inside the outer cylinder (2-1), a piston (2-3) is provided inside the inner cylinder (2-2), an intermediate liquid pipe (2-4) is provided inside the inner cylinder (2-2), the bottom end of the intermediate liquid pipe (2-4) is connected to the bottom of the inner cylinder (2-2), the top end of the intermediate liquid pipe (2-4) extends into the inner part of the piston (2-3), a bottom valve (2-5) is provided at the bottom of the inner cylinder (2-2), a first liquid inlet channel (2-1-1) and a liquid outlet channel (2-1-2) are provided at the lower part of the outer cylinder (2-1), a second liquid inlet channel (2-1-3) is provided at the upper part of the outer cylinder (2-1), a ball head (2-6) is provided at the bottom end of the outer cylinder (2-1), and the control valve assembly (3) is provided on the outer side of the outer cylinder (2-1).

4. The goaf retaining column according to claim 3, characterized in that: The base (1) is provided with a ball seat on top that matches the ball head (2-6).

5. The pier for leaving a roadway along the goaf according to claim 3, characterized in that: The control valve group (3) includes a reversing valve (3-1), a column valve (3-2), a high-flow safety valve (3-3), and an inlet / outlet ball valve (3-4). The column valve (3-2) is located on the first inlet channel (2-1-1), the high-flow safety valve (3-3) is located on the outlet channel (2-1-2), the inlet / outlet ball valve (3-4) is located on the outer wall of the outer cylinder (2-1), and the reversing valve (3-1) is located on the outside of the outer cylinder (2-1).

6. The goaf retaining column according to claim 1, characterized in that: The top seat (4) has a pull hole (4-1) on its side.

7. The pier for leaving a roadway along the goaf according to claim 1, characterized in that: The top surface of the top seat (4) is provided with a second mounting hole (4-2).

8. A goaf-side retaining pillar support system, comprising a support system constructed using goaf-side retaining pillars as described in any one of claims 1-7, characterized in that: It includes multiple sets of goaf retaining columns, each set of goaf retaining columns has a steel beam (5) on its top surface, a horizontal tie rod (6) is set between two adjacent sets of goaf retaining columns, and an inlet pipe (7) and a return pipe (8) are connected between two adjacent sets of goaf retaining columns.

9. The goaf retaining pillar support system according to claim 8, characterized in that: Each group of the aforementioned gap-retention piers includes two gap-retention piers.

10. The goaf-side retaining pillar support system according to claim 8, characterized in that: The steel beam (5) is configured as a π-shaped steel beam.

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