A temporary advance support device for a recovery roadway without repeated support

Abstract

The application discloses a kind of temporary advance support equipment of repeated support-free recovery roadway, and the temporary advance support equipment of repeated support-free recovery roadway includes several groups of laterally telescopic door type support and slide rail steel frame, support transport vehicle, support auxiliary crane;The several groups of door type support are sequentially arranged side by side along the length direction of recovery roadway, and slide rail steel frame is arranged in the inboard of door type support, and the two ends of slide rail steel frame are slidably connected with several groups of door type support, and the top of slide rail steel frame is respectively provided with transport vehicle slide rail, crane slide rail, and the length direction of transport vehicle slide rail and crane slide rail is consistent with the arrangement direction of several groups of door type support, and slide rail steel frame is connected with support transport vehicle by transport vehicle slide rail, and slide rail steel frame is connected with support auxiliary crane by crane slide rail.

Description

Technical Field

[0001] This invention relates to the field of coal mining, and in particular to a temporary advanced support device for mining roadways without repeated support. Background Technology

[0002] Advance supports for coal mine longwall mining roadways refer to auxiliary measures implemented during the longwall mining process, where the roadway is excavated ahead of the face to ensure safety. Statistical analysis of measured mine pressure data from both domestic and international sources shows that for Class II-III roofs, the influence range of the support pressure ahead of the longwall face can reach 50m. Specifically, the section from 0-5m from the longwall face exhibits the highest rate of increase in the approach velocity of the roof and floor, representing a rapid increase in pressure; the section from 5-20m shows the second highest rate of increase, representing a rising pressure zone; and the section from 20-50m shows a very small rate of increase, representing a gradual increase in pressure. Outside this zone is the original rock stress zone, unaffected by the support pressure. Furthermore, as the old roof rock hardens and its thickness increases, the influence range of the support pressure ahead of the longwall face will expand. Therefore, it is evident that reinforced support for the roadway roof and sidewalls is necessary within 20m of the longwall face.

[0003] The main types of advanced support equipment currently used in my country are: (1) wooden pillars; for a long time, wooden pillars have been the main means of coal mining in my country, especially in some small coal mines, where wooden pillars are still the main means of advanced support. (2) series support with anchor bolts as the main body; this support method is proactive and timely, which can make full use of the strength of the surrounding rock itself to reduce the deformation of the surrounding rock, prevent the roof from delaminating and flaking, and make the roof subsidence significantly less than that of the frame support, resulting in a reduction in the degree of roof breakage within the end range, which is beneficial to the end and advanced support. (3) single hydraulic prop support; according to the different connection methods of the top beam and the prop, it can be divided into hinged top beam, long steel beam, π-shaped top beam, double wedge top beam, block top beam and mesh top beam support, etc. At present, the common method used in coal mining faces is single prop + π-shaped long beam for end support or single prop + π-shaped hinged top beam for roadway advanced support. (4) advanced hydraulic support; including self-moving roadway support, alternating moving support and unit support. These advanced support methods all have the advantages of high working resistance, large support area, high strength and good stability. However, self-moving roadway support causes damage to the roof by repeated support. Alternating moving support and unit support require support transport vehicles and monorail cranes to transport the supports, which have strict requirements on the roadway floor and the transport device.

[0004] However, existing advanced support equipment still has the following problems:

[0005] (1) Single hydraulic prop support; This support method has a large contact area with the roof, and when the pressure on the roof in the mine is not too high, it has a good maintenance effect on the roof and no repeated support effect on the roof. However, when the stress of the surrounding rock is high, the support strength is low, and the labor intensity is high and a lot of support materials are used.

[0006] (2) Although the self-moving roadway support has sufficient support strength, its moving process will repeatedly support the roof, which will cause damage to the roof.

[0007] (3) Alternating mobile supports and unit supports require support transport vehicles and monorail cranes to transport supports, respectively. They have strict requirements on the roadway floor and transport equipment, and the support transport equipment occupies a large space, affecting pedestrians and ventilation. Summary of the Invention

[0008] The purpose of this invention is to address the above-mentioned problems by providing a simple and convenient temporary advance support device for mining roadways that does not require repeated support.

[0009] To achieve the above objectives, the technical solution of the present invention is as follows:

[0010] A temporary advance support device for a mining roadway without repeated support includes several sets of laterally telescopic portal frames, a slide rail steel frame, a support transport vehicle, and a support auxiliary crane. The several sets of portal frames are arranged side by side along the length of the mining roadway. The slide rail steel frame is located inside the portal frames, and both ends of the slide rail steel frame are slidably connected to the several sets of portal frames. The top of the slide rail steel frame is respectively provided with a transport vehicle slide rail and a crane slide rail. The length direction of the transport vehicle slide rail and the crane slide rail is consistent with the arrangement direction of the several sets of portal frames. The slide rail steel frame is connected to the support transport vehicle through the transport vehicle slide rail, and the slide rail steel frame is connected to the support auxiliary crane through the crane slide rail.

[0011] Furthermore, the portal frame includes a telescopic top beam and two double telescopic columns. The top ends of the two double telescopic columns are respectively connected to the two ends of the telescopic top beam, and the bottom ends of the two double telescopic columns are in contact with the ground. An adjusting cylinder is connected to the outside of the double telescopic columns and is connected to the slide rail steel frame through the adjusting cylinder. A first positioning slider is provided at one end of the adjusting cylinder, and the first positioning slider is slidably connected to the slide rail steel frame.

[0012] Furthermore, the slide rail steel frame includes a first connecting rail, a second connecting rail, and a support frame. The first and second connecting rails are symmetrically arranged inside the portal frame, and the length direction of the first and second connecting rails is consistent with the arrangement direction of the several groups of portal frames. The outer walls of the first and second connecting rails are slidably connected to the first positioning sliders at both ends of the portal frame. There are several support frames, and the several support frames are arranged side by side in sequence along the arrangement direction of the several groups of portal frames. The support frame is arranged in an inverted U-shape, and both ends of the support frame are fixedly connected to the first and second connecting rails, respectively. A transport vehicle slide rail and a crane slide rail are fixedly connected to the support frame and are connected to the support transport vehicle and the support auxiliary crane, respectively, through the transport vehicle slide rail and the crane slide rail.

[0013] Furthermore, the support transport vehicle includes a transport vehicle body, with lifting mechanisms at both ends of the transport vehicle body located in the direction of the arrangement of several sets of portal supports. A transmission gear and a transport vehicle drive motor are installed at the top of the transport vehicle body. The transmission gear is meshed with the teeth on the transport vehicle slide rail, and the transport vehicle body can move along the length direction of the transport vehicle track under the action of the transmission gear. The transmission gear is connected to the transport vehicle drive motor. Positioning mechanisms are installed on both sides of the transport vehicle body in the width direction of the mining roadway.

[0014] Furthermore, the lifting mechanism includes a support arm, a pallet, a first power cylinder, and a second power cylinder. The support arm is V-shaped, with one end connected to the main body of the transport vehicle via a pin, and the top of the other end of the support arm connected to one end of the pallet via a pin. The first power cylinder is connected between the other end of the pallet and the middle of the support arm. The second power cylinder is connected between one side of the support arm and the main body of the transport vehicle.

[0015] Furthermore, the positioning mechanism includes a side support hydraulic strut and a third power cylinder. The top of the side support hydraulic strut is connected to the main body of the transport vehicle via a pin, and the middle of the side support hydraulic strut is connected to the main body of the transport vehicle via a third power cylinder.

[0016] Furthermore, the support auxiliary crane has two sets, and the two sets of support auxiliary cranes are respectively set on both sides of the support transport vehicle. The support auxiliary crane includes a lifting cylinder, and a support plate is fixedly connected to the bottom of the lifting cylinder. The top of the lifting cylinder is connected to the crane drive motor through a screw and nut mechanism. The screw and nut mechanism and the crane drive motor are both connected to the crane slide rail.

[0017] Furthermore, there are two transport vehicle slide rails and six crane slide rails, all of which are symmetrically arranged on the slide rail steel frame.

[0018] Furthermore, each of the adjacent portal frame supports is provided with a mounting steel plate and a mounting groove, and the mounting steel plate and mounting groove are respectively provided on the side of the double telescopic column; wherein, the mounting steel plate on the portal frame support is slidably connected to the mounting groove on the adjacent portal frame support.

[0019] Compared with the prior art, the advantages and positive effects of this invention are:

[0020] The present invention provides a temporary advanced support for the mining roadway without repeated support. Since the top beam of the portal frame can be retracted laterally and the columns adopt double telescopic hydraulic props, the support transport vehicle and the support auxiliary crane are arranged under the slide rail steel frame. When moving the support, the last group of portal frames is transported to the front position of the overall support group by the support transport vehicle and the support auxiliary crane. This can achieve the effect of the rear frame becoming the front frame when the advanced support is moved, avoiding repeated support of the roadway roof. It occupies little space, does not require too much manual labor and support materials, and can adapt to roadways with different cross-sectional dimensions. It can realize automated support for the advanced section of the mining roadway up to 20m, bringing convenience to the support operation in coal mining. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1a This is a front view structural diagram of the present invention;

[0023] Figure 1b This is a right-side structural diagram of the present invention;

[0024] Figure 1c This is a top view of the structure of the present invention;

[0025] Figure 2a This is the main structural view of the support transport vehicle;

[0026] Figure 2b This is a right-side structural view of the support transport vehicle;

[0027] Figure 2c This is a top view of the support transport vehicle.

[0028] Figure 3a This is a schematic diagram of the initial position of the present invention;

[0029] Figure 3b This is the state structure diagram for step one;

[0030] Figure 3c This is the state structure diagram for step two;

[0031] Figure 3d This is the state structure diagram for step three;

[0032] Figure 3e This is the state structure diagram for step four;

[0033] Figure 3fThis is the state structure diagram for step five;

[0034] Figure 3g This is the state structure diagram for step six;

[0035] Figure 3h This is the state structure diagram for step seven;

[0036] Figure 3i This is the state structure diagram for step eight;

[0037] Figure 3j This is the state structure diagram for step nine;

[0038] Figure 3k This is the state structure diagram for step ten. Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art to all other embodiments obtained without creative effort should be included within the protection scope of the present invention.

[0040] like Figure 1a , Figure 1b , Figure 1c As shown in the figure, this embodiment discloses a temporary advanced support device for a mining roadway without repeated support, including several sets of laterally telescopic portal frames, a slide rail steel frame 4, a support transport vehicle 7, and a support auxiliary crane 6; the several sets of portal frames are arranged side by side along the length of the mining roadway, the slide rail steel frame 4 is located inside the portal frames, and both ends of the slide rail steel frame 4 are slidably connected to the several sets of portal frames. The top of the slide rail steel frame 4 is respectively provided with a transport vehicle slide rail and a crane slide rail. The length direction of the transport vehicle slide rail and the crane slide rail is consistent with the arrangement direction of the several sets of portal frames. The slide rail steel frame 4 is connected to the support transport vehicle 7 through the transport vehicle slide rail, and the slide rail steel frame 4 is connected to the support auxiliary crane 6 through the crane slide rail.

[0041] The portal frame includes a telescopic top beam 1 and two double telescopic columns 3. The top ends of the two double telescopic columns 3 are respectively connected to the two ends of the telescopic top beam 1, and the bottom ends of the two double telescopic columns 3 are in contact with the ground. The outer side of the double telescopic columns 3 is connected to an adjusting cylinder 5 through a hinge structure 2 and is connected to a slide rail steel frame 4 through the adjusting cylinder 5. A first positioning slider 10 is provided at the end of the adjusting cylinder 5 away from the hinge structure 2, and the first positioning slider 10 is slidably connected to the slide rail steel frame 4.

[0042] The adjacent portal frame supports are respectively provided with mounting steel plates 11 and mounting grooves. The mounting steel plates 11 and mounting grooves are respectively provided on the side of the double telescopic column 3, and the mounting grooves are provided on the hinge structure 2. The mounting steel plates 11 on the portal frame support are slidably connected to the mounting grooves on the adjacent portal frame support.

[0043] The slide rail steel frame 4 includes a first connecting rail 22, a second connecting rail 23, and a support frame 8. The first connecting rail 22 and the second connecting rail 23 are symmetrically arranged inside the portal frame. The length direction of the first connecting rail 22 and the second connecting rail 23 is consistent with the arrangement direction of several groups of portal frames. The outer walls of the first connecting rail 22 and the second connecting rail 23 are slidably connected to the first positioning sliders 10 at both ends of the portal frame. There are several support frames 8, and the several support frames 8 are arranged side by side in sequence along the arrangement direction of several groups of portal frames. The support frame 8 is arranged in an inverted U-shape, and the two ends of the support frame 8 are fixedly connected to the first connecting rail 22 and the second connecting rail 23, respectively. The support frame 8 is fixedly connected to a transport vehicle slide rail and a crane slide rail, and is connected to the support transport vehicle 7 and the support auxiliary crane 6, respectively, through the transport vehicle slide rail and the crane slide rail.

[0044] There are two transport vehicle slide rails and six crane slide rails. The two transport vehicle slide rails and the six crane slide rails are symmetrically arranged on the slide rail steel frame 4.

[0045] The support auxiliary crane 6 consists of two sets, each set positioned on either side of the support transport vehicle 7. Each support auxiliary crane 6 includes a lifting cylinder 601, with a support plate 602 fixedly connected to its bottom end. The top end of the lifting cylinder 601 is connected to the crane drive motor 9 via a screw and nut mechanism 12. Both the screw and nut mechanism 12 and the crane drive motor 9 are connected to the crane's slide rail. Essentially, the support auxiliary crane 6 is a hydraulic cylinder with a support plate at its lower end. The screw and nut mechanism is a common drive mechanism that allows the nut connected to the support auxiliary crane to move along the screw through rotation.

[0046] like Figure 2a , Figure 2b , Figure 2c As shown, the support transport vehicle 7 includes a transport vehicle body 15. The transport vehicle body 15 is equipped with lifting mechanisms at both ends of the direction in which several groups of portal supports are arranged. The top of the transport vehicle body 15 is equipped with a transmission gear 20 and a transport vehicle drive motor 21. The transmission gear 20 is meshed with the teeth on the transport vehicle slide rail, and the transport vehicle body 15 can move along the length direction of the transport vehicle track under the action of the transmission gear 20. The transmission gear 20 is connected to the transport vehicle drive motor 21. The transport vehicle body 15 is equipped with positioning mechanisms on both sides of the width direction of the mining roadway.

[0047] The lifting mechanism includes a support arm 13, a pallet 14, a first power cylinder 16, and a second power cylinder 17. The support arm 13 is V-shaped. One end of the support arm 13 is pin-connected to the main body 15 of the transport vehicle, and the top of the other end of the support arm 13 is pin-connected to one end of the pallet 14. The first power cylinder 16 is connected between the other end of the pallet 14 and the middle of the support arm 13. The second power cylinder 17 is connected between one side of the support arm 13 and the main body 15 of the transport vehicle.

[0048] The positioning mechanism includes a side-support hydraulic strut 18 and a third power cylinder 24. The top of the side-support hydraulic strut 18 is connected to the transport vehicle body 15 by a pin, and the third power cylinder 24 is connected between the middle of the side-support hydraulic strut 18 and the transport vehicle body 15. The first power cylinder 16, the second power cylinder 17, and the third power cylinder 24 are all supplied with oil through a hydraulic pump station 19 installed on the transport vehicle body 15.

[0049] The first power cylinder controls the angle between the pallet and the support arm, keeping the pallet in a horizontal position. The second power cylinder controls the swing amplitude of the support arm, indirectly controlling the height of the pallet. The third power cylinder controls the angle between the side support hydraulic column and the vertical direction. When the third power cylinder extends, it keeps the side support hydraulic column at a 90° angle with the vertical direction. The side support hydraulic column extends to support both sides of the tunnel, fixing the main body of the transport vehicle. Then, the transport vehicle drive motor drives the transmission gear to make the slide rail steel frame slide.

[0050] The specific relocation process is as follows:

[0051] The initial positions of each component of the temporary advance support without repeated support in the mining roadway of this invention are as follows: Figure 3a As shown;

[0052] (1) Move the support transport vehicle to a position that will not affect the extension of the side support hydraulic props. Extend the third power cylinder to make the side support hydraulic props maintain a 90° angle with the vertical direction. Extend the side support hydraulic props to support both sides of the roadway. Fix the support transport vehicle, such as... Figure 3b As shown.

[0053] (2) After the support transport vehicle is fixed, the slide rail steel frame moves relative to the support transport vehicle and slides to the support transport vehicle through the drive motor of the transport vehicle. Figure 3c At the position shown, the first positioning slider at one end of the adjusting cylinder on the leftmost portal bracket slides out from the connecting rail on the side of the slide rail steel frame, and the portal bracket is disconnected from the slide rail steel frame; if the side support hydraulic column collides with the slide rail steel frame during the sliding process of the slide rail steel frame, then repeat step one.

[0054] (3) Move the support transport vehicle so that the pallet on the support transport vehicle is directly opposite the top beam of the portal frame. Figure 3d As shown.

[0055] (4) Control the descent of the double telescopic columns of the portal frame, the pallet on the support transport vehicle contacts the top beam of the portal frame, and the locking teeth on the pallet engage with the locking teeth on the bottom beam. The lower end of the double telescopic columns rises, causing the base at the bottom of the columns to leave the roadway floor. The telescopic top beam retracts towards the center. At this time, the entire portal frame is lifted by the support transport vehicle. Figure 3e As shown.

[0056] (5) Move the auxiliary crane of the support frame so that its pallet contacts the top beam of the gantry frame. Control the second power cylinder to make the pallet on the support transport vehicle leave the gantry frame. At this time, the gantry frame is completely moved by the auxiliary crane of the support frame. Control the second power cylinder again to lift the boom. The auxiliary crane of the support frame, together with the gantry frame, passes under the support transport vehicle and reaches the other side of the support transport vehicle. Figure 3f And place the gantry bracket on the other side tray.

[0057] (6) The third power cylinder retracts, the side support hydraulic props move away from the sides of the roadway, and the control support transport vehicle moves the portal frame to the position requiring support, such as... Figure 3g As shown.

[0058] (7) Move the support transport vehicle to a position where it will not affect the extension of the side support hydraulic props. Extend the third power cylinder to make the side support hydraulic props maintain a 90° angle with the vertical direction. Extend the side support hydraulic props to support both sides of the roadway. Fix the support transport vehicle, as follows. Figure 3h As shown.

[0059] (8) After the support transport vehicle is fixed, the slide rail steel frame is slid to the position driven by the transport vehicle drive motor. Figure 3i The location shown provides space for the portal frame to unfold and provide support. If the side support hydraulic strut collides with the portal frame during the sliding process, repeat step seven.

[0060] (9) Move the support transport vehicle, adjust the position of the portal frame, and extend the top beam to both sides so that the mounting steel plate fixed to it enters the mounting groove on the previous set of portal frames. The double telescopic columns of the portal frame extend so that the column base contacts the roadway floor and the top beam contacts the roadway roof, thus supporting the roadway. Figure 3j As shown.

[0061] (10) Repeat steps seven and eight to bring the steel frame slide rail into position as follows. Figure 3k At the position shown, the first positioning slider at one end of the adjusting cylinder of the movable gantry bracket enters the connecting rail on the side of the slide rail steel frame, thus completing one frame moving operation.

[0062] The present invention provides a temporary advanced support for the mining roadway without repeated support. Since the top beam of the portal frame can be retracted laterally and the columns adopt double telescopic hydraulic props, the support transport vehicle and the support auxiliary crane are arranged under the slide rail steel frame. When moving the support, the last group of portal frames is transported to the front position of the overall support group by the support transport vehicle and the support auxiliary crane. This can achieve the effect of the rear frame becoming the front frame when the advanced support is moved, avoiding repeated support of the roadway roof. It occupies little space, does not require too much manual labor and support materials, and can adapt to roadways with different cross-sectional dimensions. It can realize automated support for the advanced section of the mining roadway up to 20m, bringing convenience to the support operation in coal mining.

Claims

1. A temporary advance support device for mining roadways without repeated support, characterized in that: The temporary advanced support equipment for the mining roadway without repeated support includes several sets of laterally telescopic portal frames, as well as slide rail steel frames, support transport vehicles, and support auxiliary cranes. The several sets of portal frames are arranged side by side along the length of the mining roadway. The slide rail steel frames are located inside the portal frames. Both ends of the slide rail steel frames are slidably connected to the several sets of portal frames. The top of the slide rail steel frames is respectively equipped with transport vehicle slide rails and crane slide rails. The length direction of the transport vehicle slide rails and crane slide rails is consistent with the arrangement direction of the several sets of portal frames. The slide rail steel frames are connected to the support transport vehicles through the transport vehicle slide rails and to the support auxiliary cranes through the crane slide rails. The support transport vehicle includes a transport vehicle body. Lifting mechanisms are installed at both ends of the transport vehicle body along the arrangement direction of several sets of portal supports. A transmission gear and a transport vehicle drive motor are installed at the top of the transport vehicle body. The transmission gear is meshed with teeth on the transport vehicle slide rail, and the transport vehicle body can move along the length of the transport vehicle track under the action of the transmission gear. The transmission gear is connected to the transport vehicle drive motor. Positioning mechanisms are installed on both sides of the transport vehicle body along the width direction of the mining roadway. The lifting mechanism includes a support arm, a pallet, a first power cylinder, and a second power cylinder. The support arm is V-shaped, with one end connected to the main body of the transport vehicle via a pin, and the top of the other end of the support arm connected to one end of the pallet via a pin. The first power cylinder is connected between the other end of the pallet and the middle of the support arm. The second power cylinder is connected between one side of the support arm and the main body of the transport vehicle. The bracket auxiliary crane has two sets, and the two sets of bracket auxiliary cranes are respectively set on both sides of the bracket transport vehicle. The bracket auxiliary crane includes a lifting cylinder. The bottom end of the lifting cylinder is fixedly connected to a support plate. The top end of the lifting cylinder is connected to the crane drive motor through a screw and nut mechanism. The screw and nut mechanism and the crane drive motor are both connected to the crane slide rail. There are two transport vehicle slide rails and six crane slide rails. The two transport vehicle slide rails and the six crane slide rails are symmetrically arranged on the slide rail steel frame.

2. The temporary advance support equipment for mining roadways without repeated support as described in claim 1, characterized in that: The portal frame includes a telescopic top beam and two double telescopic columns. The top ends of the two double telescopic columns are respectively connected to the two ends of the telescopic top beam, and the bottom ends of the two double telescopic columns are in contact with the ground. An adjusting cylinder is connected to the outside of the double telescopic columns and is connected to the slide rail steel frame through the adjusting cylinder. A first positioning slider is provided at one end of the adjusting cylinder, and the first positioning slider is slidably connected to the slide rail steel frame.

3. The temporary advance support equipment for mining roadways without repeated support as described in claim 2, characterized in that: The slide rail steel frame includes a first connecting rail, a second connecting rail, and a support frame. The first and second connecting rails are symmetrically arranged inside the portal frame. The length direction of the first and second connecting rails is consistent with the arrangement direction of several groups of portal frames. The outer walls of the first and second connecting rails are slidably connected to the first positioning sliders at both ends of the portal frame. There are several support frames, and these support frames are arranged side by side in sequence along the arrangement direction of several groups of portal frames. The support frame is arranged in an inverted U-shape, and both ends of the support frame are fixedly connected to the first and second connecting rails, respectively. A transport vehicle slide rail and a crane slide rail are fixedly connected to the support frame and are connected to the support transport vehicle and the support auxiliary crane, respectively, through the transport vehicle slide rail and the crane slide rail.

4. The temporary advance support equipment for mining roadways without repeated support as described in claim 1, characterized in that: The positioning mechanism includes a side support hydraulic strut and a third power cylinder. The top of the side support hydraulic strut is connected to the main body of the transport vehicle via a pin, and the middle of the side support hydraulic strut is connected to the main body of the transport vehicle via a third power cylinder.

5. The temporary advance support equipment for mining roadways without repeated support as described in claim 4, characterized in that: Each adjacent portal frame is equipped with a mounting steel plate and a mounting groove, which are respectively located on the side of the double telescopic column; the mounting steel plate on the portal frame is slidably connected to the mounting groove on the adjacent portal frame.

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