Retractable U-shaped steel gangue retaining column quick mounting device

Abstract

The utility model discloses a retractable U-shaped steel gangue blocking column rapid installation device which comprises a jacking device and a plurality of sets of gangue blocking telescopic columns which are vertically arranged, any two adjacent sets of gangue blocking telescopic columns are connected through a pull rod assembly, and the lower portions of the gangue blocking telescopic columns are provided with supporting points matched with the jacking device in a pressing connection mode. The outer U-shaped steel and the inner U-shaped steel are connected together through the clamping cable to be used for roadside waste rock blocking support, when the vertical pressure of a top plate or a bottom plate reaches the sliding friction force between the outer U-shaped steel and the inner U-shaped steel, the outer U-shaped steel and the inner U-shaped steel slide relatively, and therefore the waste rock blocking telescopic column is prevented from being pressed to be bent laterally, and the waste rock blocking telescopic column and deep surrounding rock deform to be in a coupling state; good lateral pressure resistance can be kept from beginning to end, and a good side protection effect can be achieved. According to the utility model, each part cannot be damaged, the height can be adjusted in the mounting and supporting processes, and the device has the advantages of simple structure, quick mounting and convenience in recovery.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of mining engineering technology, and specifically relates to a telescopic U-shaped steel gangue blocking column rapid installation device. BACKGROUND

[0002] In the coal industry, the traditional U-shaped steel gangue blocking column square installation has many problems, including difficult installation positioning and adjustment, high labor intensity and great safety hazards, insufficient connection and fastening and poor stability, low recovery rate, and high requirements for coal mine underground space and environment. In order to solve the defects of the traditional U-shaped steel gangue blocking column installation mode, the telescopic U-shaped steel gangue blocking column rapid installation emerges as the times require. The telescopic column net system adopts telescopic U-shaped steel as the main gangue blocking structure. The main form of gangue blocking is telescopic gangue blocking U-shaped steel and steel mesh; the telescopic gangue blocking U-shaped steel adopts 36U-shaped steel, and the spacing is 800-1000mm.

[0003] The installation process of the traditional U-shaped steel support is as follows: 1. Positioning and measurement: determine the position and length of the U-shaped steel support according to the design requirements and accurately measure to ensure the accuracy of the construction. 2. Steel plate cutting and pretreatment: according to the measurement results, use a cutting machine to cut the U-shaped steel into appropriate length and then treat the cutting edge to remove sharp edges. 3. Piling and fixing: use a pile driver to support the U-shaped steel on the ground and then use a fixer to firmly connect the U-shaped steel with the ground to ensure its stability. 4. Installing support rods: according to the design requirements, insert the support rods into the holes of the U-shaped steel and connect them with the U-shaped steel through connectors to increase the strength and stability of the support structure. 5. Adjustment and fixation: adjust the U-shaped steel support according to the actual situation to make it tightly fit with the ground and fix it on the ground through the fixer to ensure the stability of the entire support structure.

[0004] According to the practice experience of cutting roof and leaving roadway, the conventional single hydraulic prop and I-shaped steel are often used for gangue blocking support on the side of the roadway in the thin coal seam cutting roof along the empty roadway, and good support effect can be achieved. However, when the hydraulic single prop and I-shaped steel are used for gangue blocking support on the side of the roadway in the medium-thick and thick coal seam, bending and breaking often occur due to the inability to adapt to the large deformation of deep surrounding rock, and even the gangue blocking support ability is lost. The failure of the gangue blocking support leads to the continuous extrusion of the gangue bank into the roadway, resulting in serious bank drumming, and the continuous drumming of the bank creates conditions for the roof sinking and floor heaving, and the sinking of the roof increases the vertical stress of the gangue bank, which in turn aggravates the extrusion of the gangue bank into the roadway, thus forming a vicious cycle until the along-empty roadway loses stability and is destroyed, which cannot meet the use requirements.

[0005] Generally, the gangue in goaf has small horizontal thrust on the gangue blocking support device beside the roadway, and the lateral horizontal thrust is not the main factor for the damage of the gangue blocking support device; the vertical pressure from the roof and floor of the roadway is large, and increases significantly with the increase of the depth, when the vertical pressure from the roof and floor of the roadway exceeds the bending strength of the rigid support such as the I-beam, the I-beam starts to bend and deform, and after the I-beam bends and deforms, the lateral pressure resistance of the I-beam is greatly reduced, thereby losing the gangue blocking capacity. Content of the utility model

[0006] In order to solve the above technical problems in the prior art, the utility model provides a telescopic U-shaped steel gangue blocking column quick mounting device with adjustable height, convenient installation and high gangue blocking strength.

[0007] In order to solve the above technical problems, the utility model adopts the following technical scheme: a telescopic U-shaped steel gangue blocking column quick mounting device, comprising a jacking device and a plurality of groups of gangue blocking telescopic columns arranged vertically, any two adjacent groups of gangue blocking telescopic columns are connected through a pull rod assembly, and the lower part of the gangue blocking telescopic column is provided with a support point for pressure connection with the jacking device.

[0008] Each group of gangue blocking telescopic columns comprises an outer U-shaped steel and an inner U-shaped steel arranged vertically, the inner U-shaped steel is arranged in the outer U-shaped steel, and the outer U-shaped steel and the inner U-shaped steel are fastened and connected through at least two clamping cables.

[0009] The clamping cable comprises a U-shaped clamp and a pressing plate, the pressing plate is connected with the U-shaped clamp through two first bolt assemblies which are symmetrical left and right, the inner side surface of the pressing plate is pressure connected with two side edges of the inner U-shaped steel, and the inner wall of the U-shaped clamp is pressure connected with the outer surface of the outer U-shaped steel.

[0010] The pull rod assembly comprises a first pull rod and a second pull rod, the first pull rod is a straight rod, the left side and the right side of the second pull rod are bent to form U-shaped grooves, the two U-shaped grooves are installed on the outside of the two outer U-shaped steels, the inner side surface of the first pull rod is pressure connected with four side edges of the two inner U-shaped steels, and the first pull rod and the second pull rod are fastened and connected through four second bolt assemblies.

[0011] The lower end surface of the inner U-shaped steel is higher than the lower end surface of the outer U-shaped steel, and the support point is a fixed plate welded on the inner wall of the inner U-shaped steel.

[0012] The technical scheme is adopted, the U-shaped steel in the application adopts 36U-shaped steel, and the jacking device adopts a hydraulic jack. Compared with the installation of the traditional U-shaped steel support, each group of the gangue blocking telescopic column in the application adopts the upper and lower two sections of the overlapped U-shaped steel, the single long length can be adjusted according to the height of the roadway, in use, three sets of the cable clamps are used to preliminarily fix the two U-shaped steels, the lower end of the outer U-shaped steel is embedded into the floor by not less than 200mm, the hydraulic jack is connected with the hydraulic oil pump and adjusts the inner U-shaped steel to the appropriate height by supporting the inner wall of the lower part of the inner U-shaped steel, then the first bolt assembly on the two sides of the cable clamp is tightened to firmly fix the outer U-shaped steel and the inner U-shaped steel. The height of the other groups of the gangue blocking telescopic column is adjusted and fixed by using the same way. The adjacent two groups of the gangue blocking telescopic column are connected in series by using the pull rod assembly, and finally all the second bolt assemblies are tightened.

[0013] The utility model discloses adopt hydraulic power drive inner U-shaped steel to realize accurate stroke control upwards, make the support height and the roof subsidence amount match, make the inner U-shaped steel top and the roadway roof contact surface keep vertical, contact area is big, and the support strength can reach the design requirement. The pull rod assembly is connected between the adjacent two groups of the gangue blocking telescopic column, makes the whole gangue blocking telescopic column be connected as a whole, and the stability and the overall strength of the gangue blocking telescopic column are enhanced.

[0014] The utility model discloses adopt cable clamp and connect outer U-shaped steel and inner U-shaped steel together for gangue blocking support in the roadside, when the vertical pressure of the roof or the floor reaches the sliding friction between outer U-shaped steel and inner U-shaped steel, outer U-shaped steel and inner U-shaped steel produce relative sliding, thereby avoiding that the gangue blocking telescopic column is bent on the pressure side, thereby with the deep surrounding rock deformation reaches the coupling state, can keep good lateral pressure resistance throughout, can obtain good help protection effect. The utility model discloses each component will not be damaged, can adjust the height in the installation and support process, has the advantages of simple structure, fast installation, convenient recovery. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall appearance structure schematic diagram of the utility model;

[0016] Figure 2 It is Figure 1 The enlarged view of a group of gangue blocking telescopic columns in the utility model;

[0017] Figure 3 It is Figure 1 The structure schematic diagram of the pull rod assembly in the utility model;

[0018] Figure 4 It is the structure schematic diagram of the cable clamp. DETAILED DESCRIPTION

[0019] The embodiment of the utility model is described in further detail below in combination with the drawings and examples.

[0020] AsFigures 1-4 The utility model discloses a telescopic U-shaped steel gangue blocking column quick mounting device, including jacking device 1 and the vertical setting of several groups of gangue blocking telescopic column 2, and the gangue blocking telescopic column 2 of arbitrary adjacent two groups is connected through pull rod subassembly 3, and the gangue blocking telescopic column 2 lower part is equipped with the support point 4 of jacking device 1 pressure joint cooperation.

[0021] Each group of gangue blocking telescopic column 2 includes vertical lap's outer U-shaped steel 5 and inner U-shaped steel 6, and the inner U-shaped steel 6 is arranged in the outer U-shaped steel 5, and the outer U-shaped steel 5 and the inner U-shaped steel 6 are connected through at least two clamping cables 7.

[0022] The clamping cable 7 includes a U-shaped clamp 8 and a pressing plate 9, the pressing plate 9 is connected with the U-shaped clamp 8 through two first bolt assemblies 10 which are symmetrical left and right, the inner side surface of the pressing plate 9 is in pressure joint with the two side edges of the inner U-shaped steel 6, and the inner wall of the U-shaped clamp 8 is in pressure joint with the outer surface of the outer U-shaped steel 5.

[0023] The pull rod subassembly 3 includes a first pull rod 11 and a second pull rod 12, the first pull rod 11 is a straight rod, the left side and the right side of the second pull rod 12 are bent to form U-shaped grooves 13 respectively, the two U-shaped grooves 13 are installed on the outside of the two outer U-shaped steels 5 respectively, the inner side surface of the first pull rod 11 is in pressure joint with the four side edges of the two inner U-shaped steels 6, and the first pull rod 11 and the second pull rod 12 are connected through four second bolt assemblies 14.

[0024] The lower end surface of the inner U-shaped steel 6 is higher than the lower end surface of the outer U-shaped steel 5, the support point 4 is a fixed plate welded on the inner wall of the inner U-shaped steel 6, and the bottom surface of the support point 4 is flush with the lower end surface of the inner U-shaped steel 6.

[0025] The U-shaped steel in the application adopts 36U-shaped steel, and the jacking device 1 adopts a hydraulic jack. Compared with the installation of the traditional U-shaped steel support, each group of gangue blocking telescopic column 2 in the application adopts two-section lap joint U-shaped steel, and the length of a single rod can be adjusted according to the height of the roadway. In use, three clamping cables 7 are used to preliminarily fix two U-shaped steels, the lower end of the outer U-shaped steel 5 is embedded in the floor by not less than 200 mm, the hydraulic jack is connected with a hydraulic oil pump, and the inner U-shaped steel 6 is adjusted to a proper height by supporting the support point 4 on the inner wall of the lower part of the inner U-shaped steel 6, then the first bolt assemblies 10 on the two sides of the clamping cable 7 are tightened to firmly fix the outer U-shaped steel 5 and the inner U-shaped steel 6. The height of the other groups of gangue blocking telescopic column 2 is adjusted and fixed in the same way. The adjacent two groups of gangue blocking telescopic column 2 are connected in series by using the pull rod subassembly 3, and finally all the second bolt assemblies 14 are tightened.

[0026] The utility model adopts hydraulic power drive inner U type steel 6 upwardly to realize accurate stroke control, makes the support height and the roof subsidence amount match, makes the inner U type steel 6 top end and the roadway roof contact surface keep perpendicular, and the contact area is big, and the support strength can reach the design requirement. The pull rod assembly 3 is connected between the two groups of gangue blocking telescopic column 2, makes the whole gangue blocking telescopic column 2 be connected as a whole, and the stability and the overall strength of gangue blocking telescopic column 2 are enhanced.

[0027] The utility model discloses a cable card 7 is used for the roadside gangue blocking support to connect outer U type steel 5 and inner U type steel 6 together, when the roof or the vertical pressure of bottom plate reaches the sliding friction between outer U type steel 5 and inner U type steel 6, outer U type steel 5 and inner U type steel 6 produce relative sliding, thereby avoiding the lateral bending of gangue blocking telescopic column 2 under pressure, thereby with the deep surrounding rock deformation reaches the coupling state, can keep good lateral pressure resistance throughout, and better help protection effect can be obtained.

[0028] The above embodiment illustrates the basic principle and characteristics of the utility model, but the above only illustrates the better embodiment of the utility model, and is not limited by the described embodiment. The ordinary skill in the art can make many forms of deformation and improvement under the inspiration of the patent without departing from the purpose of the utility model and the scope protected by the claims, and these all belong to the protection scope of the utility model. Therefore, the utility model patent and the protection scope should be accurate with the attached claims.

Claims

1. A retractable U-shaped steel retaining wall quick-installation device, characterized in that: The device comprises a jacking device and a plurality of groups of gangue blocking telescopic columns arranged vertically, any two adjacent groups of gangue blocking telescopic columns are connected through a pull rod assembly, and the lower part of the gangue blocking telescopic column is provided with a supporting point in pressure contact with the jacking device.

2. The quick installation device for the retractable U-shaped steel refuse blocking column according to claim 1, characterized in that: Each group of gangue blocking telescopic columns comprises vertically overlapped outer U-shaped steel and inner U-shaped steel, the inner U-shaped steel is arranged in the outer U-shaped steel, and the outer U-shaped steel and the inner U-shaped steel are fastened and connected through at least two clamping cables.

3. The quick installation device for the retractable U-shaped steel refuse blocking column according to claim 2, characterized in that: The clamping cable comprises a U-shaped clamp and a pressing plate, the pressing plate is connected with the U-shaped clamp through two left-right symmetrical first bolt assemblies, the inner side surface of the pressing plate is in pressure contact with the two side edges of the inner U-shaped steel, and the inner wall of the U-shaped clamp is in pressure contact with the outer surface of the outer U-shaped steel.

4. The quick installation device for the retractable U-shaped steel block column according to claim 2 or 3, characterized in that: The pull rod assembly comprises a first pull rod and a second pull rod, the first pull rod is a straight rod, the left side and the right side of the second pull rod are respectively bent to form a U-shaped groove, the two U-shaped grooves are respectively installed on the outside of the two outer U-shaped steels, the inner side surface of the first pull rod is in pressure contact with the four side edges of the two inner U-shaped steels, and the first pull rod and the second pull rod are fastened and connected through four second bolt assemblies.

5. The quick installation device for the retractable U-shaped steel block-out column according to claim 2 or 3, characterized in that: The lower end surface of the inner U-shaped steel is higher than the lower end surface of the outer U-shaped steel, and the supporting point is a fixed plate welded on the inner wall of the inner U-shaped steel.

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