Gob-side entry retaining mode support

Abstract

A kind of along empty roadway hanging mode support, including unit support, reciprocating drive mechanism, the travel direction of unit support is first direction, the direction perpendicular to first direction is second direction, the direction perpendicular to first direction and second direction is third direction, the unit support can be elongated or shortened along third direction, the unit support is arranged three groups along first direction, and each group of unit support is arranged two along second direction, two unit supports adjacent in first direction are connected by reciprocating drive mechanism, the reciprocating drive mechanism includes at least one first telescopic piece, the two ends of the first telescopic piece are respectively hinged with the unit support of corresponding side, no longer set outer frame as in prior art, instead, add a group of unit support, and the first and last of the previous two groups of unit support are connected, compared with prior art, the width size of the along empty roadway hanging mode support is small, suitable for use in long and narrow roadway.

Description

Technical Field

[0001] This invention relates to the field of underground support equipment technology in coal mines, and in particular to a formwork support for roadway retention along the goaf. Background Technology

[0002] The patents "Device and Method for Constructing Continuous Concrete Walls along the Goaf in Mining Faces" (Patent No.: ZL200910023718.1) and "A Flexible Fiber Template for Goaf Retention with Horizontal and Inclined Stretch and its Filling Method" (Patent No.: 201510607404.1) are known as flexible formwork concrete goaf retention technology. This technology effectively reduces the loss of coal pillars during coal mining and improves the recovery rate of coal resources.

[0003] Shaanxi Kaituo Construction Technology Co., Ltd. disclosed a self-moving formwork hanging device for roadway retention (application number: 202311009425.4), including a formwork hanging mechanism and a self-moving mechanism. The formwork hanging mechanism consists of multiple top beams and multiple columns. The self-moving mechanism consists of two inner frames, two outer frames, and two reciprocating drive mechanisms. One end of each reciprocating drive mechanism is connected to the corresponding inner frame, and the other end is connected to the corresponding outer frame. The multiple columns are arranged in two groups, with one end of each group connected to the corresponding inner frame and the other end connected to the corresponding top beam. A front frame is provided between the two inner frames. This invention can move self-moving and replace the existing methods of formwork hanging using single hydraulic supports, anchor bolts, or wooden point columns.

[0004] However, the self-moving formwork hanging device along the goaf is equipped with an inner frame and an outer frame, which makes the overall formwork hanging device relatively wide, affecting its use in narrow and long goafs. Summary of the Invention

[0005] In view of this, and to address the above-mentioned shortcomings, it is necessary to propose a formwork support system for roadway retention.

[0006] A formwork support for a goaf retaining space includes unit supports and a reciprocating drive mechanism. The traveling direction of the unit supports is a first direction, the direction perpendicular to the first direction is a second direction, and the direction perpendicular to both the first and second directions is a third direction. The unit supports can be extended or shortened along the third direction. The unit supports are arranged in three groups along the first direction, and two unit supports are arranged in each group along the second direction. Two adjacent unit supports in the first direction are connected by the reciprocating drive mechanism. The reciprocating drive mechanism includes at least one first telescopic member, and the two ends of the first telescopic member are respectively hinged to the unit supports on the corresponding side.

[0007] Preferably, the unit support includes a top beam, a second telescopic member, and a first sliding shoe. The top beam and the first sliding shoe are connected by the second telescopic member, and there are two second telescopic members arranged along a first direction.

[0008] Preferably, two grooves are provided on the upper surface of the top beam, and the two grooves are located at both ends of the top beam.

[0009] Preferably, the reciprocating drive mechanism includes three first telescopic members, which are parallel to each other. The projection of the three first telescopic members onto the longitudinal plane is the three vertices of a triangle. The longitudinal plane is a plane perpendicular to the first direction. The two ends of the first telescopic members are respectively hinged to the first slip shoe on the corresponding side.

[0010] Preferably, the formwork support along the goaf includes a fixed frame, and the six unit supports in the first direction are a first left unit support, a first right unit support, a second left unit support, a second right unit support, a third left unit support, and a third right unit support. One end of the fixed frame is connected to the end of the first slipper of the first left unit support, and the other end of the fixed frame is connected to the end of the first slipper of the first right unit support.

[0011] Preferably, the formwork support along the goaf includes a pusher, which includes a shovel plate and two third telescopic members. The two ends of one third telescopic member are respectively hinged to the lower part of one side of the shovel plate and the end of the first slipper of the first left unit support, and the two ends of the other third telescopic member are respectively hinged to the lower part of the other side of the shovel plate and the end of the first slipper of the first right unit support.

[0012] Preferably, the pusher includes a second sliding shoe, there are two second sliding shoes, and each third telescopic member is provided with a corresponding second sliding shoe. The second sliding shoe is hinged to both the shovel plate and the third telescopic member.

[0013] Preferably, the pusher includes a fourth telescopic member, and each second slipper is provided with a corresponding fourth telescopic member. The fourth telescopic member is hinged to the upper part of the shovel plate and the second slipper.

[0014] Preferably, the formwork support along the goaf includes an adjusting component. Each of the first left unit support, the first right unit support, the second left unit support, and the second right unit support has an adjusting component on its inner side. The adjusting component includes a guard plate and a fifth telescopic component. There are several guard plates, which are stacked sequentially and adjacent guard plates are slidably connected. The guard plates are connected to the top beam and the sliding shoe of the unit support through the fifth telescopic component.

[0015] Preferably, the protective plate has a hollow structure.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the outer frame as in the prior art is no longer set, but instead an additional set of unit supports is added, which are connected end to end with the first two sets of unit supports. The two sets of unit supports hang the formwork according to the predetermined process, and the three sets of unit supports jointly bear the support according to the predetermined process. The formwork hanging support along the goaf is smaller in width than the prior art, making it suitable for use in narrow and long tunnels. Attached Figure Description

[0017] Figure 1 This is an isometric view of the formwork support for the goaf retention tunnel.

[0018] Figure 2 This is a first motion state view of the formwork support along the passageway.

[0019] Figure 3 This is a second motion state view of the formwork support along the tunnel.

[0020] Figure 4 This is a third motion state view of the formwork support along the goaf.

[0021] Figure 5 Force analysis of the third unit support in motion on a road surface where a1 is less than 14°.

[0022] Figure 6 Force analysis of the third unit support in motion on a road surface where a1 is greater than 14°.

[0023] In the figure: Unit support 10, top beam 11, second telescopic component 12, first sliding shoe 13, reciprocating drive mechanism 20, first telescopic component 21, fixed frame 30, pusher component 40, shovel plate 41, third telescopic component 42, second sliding shoe 43, fourth telescopic component 44, adjusting component 50, guard plate 51, fifth telescopic component 52. Detailed Implementation

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] See Figure 1This invention provides a formwork support for a goaf-retention tunnel, including a unit support 10 and a reciprocating drive mechanism 20. The traveling direction of the unit support 10 is a first direction, the direction perpendicular to the first direction is a second direction, and the direction perpendicular to both the first and second directions is a third direction. The unit support 10 can be extended or shortened along the third direction. Three groups of unit supports 10 are arranged along the first direction, and two unit supports 10 are arranged in each group along the second direction. Two adjacent unit supports 10 in the first direction are connected by the reciprocating drive mechanism 20. The reciprocating drive mechanism 20 includes at least one first telescopic member 21, and the two ends of the first telescopic member 21 are respectively hinged to the unit support 10 on the corresponding side.

[0026] The direction of travel can be understood as the direction in which the pusher is installed.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the outer frame as in the prior art is no longer set, but instead an additional set of unit supports 10 is added, which is connected end to end with the first two sets of unit supports 10. The two sets of unit supports 10 are hung according to the predetermined process, and the three sets of unit supports 10 jointly bear the support according to the predetermined process. The width of the hanging formwork support along the goaf is smaller than that of the prior art, making it suitable for use in narrow and long tunnels.

[0028] See Figure 1 Furthermore, the unit support 10 includes a top beam 11, a second telescopic member 12, and a first sliding shoe 13. The top beam 11 and the first sliding shoe 13 are connected by the second telescopic member 12. There are two second telescopic members 12, and the two second telescopic members 12 are arranged along the first direction.

[0029] For example, the length direction of the top beam 11 and the first slipper 13 is consistent with the first direction.

[0030] See Figure 1 Furthermore, two grooves are provided on the upper surface of the top beam 11, and the two grooves are located at both ends of the top beam 11.

[0031] For example, three grooves are provided on the upper surface of the top beam 11, two grooves are located at both ends of the top beam 11, and the third groove is located in the middle of the top beam 11. In the second direction, the hanging rod can be movably overlapped on the two grooves located on the same straight line.

[0032] See Figure 1 Furthermore, the reciprocating drive mechanism 20 includes three first telescopic members 21, which are parallel to each other. The projection of the three first telescopic members 21 onto the longitudinal plane is the three vertices of a triangle. The longitudinal plane is a plane perpendicular to the first direction. The two ends of the first telescopic members 21 are respectively hinged to the first slip shoe 13 on the corresponding side.

[0033] For example, the triangle is an isosceles triangle.

[0034] See Figure 1 Furthermore, the formwork support along the goaf includes a fixed frame 30, and the six unit supports 10 in the first direction are a first left unit support 10, a first right unit support 10, a second left unit support 10, a second right unit support 10, a third left unit support 10, and a third right unit support 10. One end of the fixed frame 30 is connected to the end of the first slipper 13 of the first left unit support 10, and the other end of the fixed frame 30 is connected to the end of the first slipper 13 of the first right unit support 10.

[0035] See Figure 1 Furthermore, the formwork support along the goaf includes a pusher 40, which includes a shovel plate 41 and a third telescopic member 42. There are two third telescopic members 42. The two ends of one third telescopic member 42 are respectively hinged to the lower part of one side of the shovel plate 41 and the end of the first slipper 13 of the first left unit support 10. The two ends of the other third telescopic member 42 are respectively hinged to the lower part of the other side of the shovel plate 41 and the end of the first slipper 13 of the first right unit support 10.

[0036] See Figure 1 Furthermore, the pusher 40 includes a second slipper 43, and there are two second slippers 43. Each third telescopic member 42 is provided with a corresponding second slipper 43. The second slipper 43 is hinged to the shovel plate 41 and the third telescopic member 42.

[0037] See Figure 1 Furthermore, the pusher 40 includes a fourth telescopic member 44, and each second slipper 43 is provided with a corresponding fourth telescopic member 44. The fourth telescopic member 44 is hinged to the upper part of the shovel plate 41 and the second slipper 43.

[0038] See Figure 1 Furthermore, the formwork support along the goaf includes an adjusting component 50. Each of the first left unit support 10, the first right unit support 10, the second left unit support 10, and the second right unit support 10 is provided with an adjusting component 50. The adjusting component 50 includes a guard plate 51 and a fifth telescopic component 52. There are several guard plates 51, which are stacked sequentially. Adjacent guard plates 51 are slidably connected. The guard plates 51 are connected to the top beam 11 and the sliding shoe of the unit support 10 through the fifth telescopic component 52.

[0039] See Figure 1 Furthermore, the protective plate 51 has a hollow structure.

[0040] For example, the first telescopic member 21, the second telescopic member 12, the third telescopic member 42, the fourth telescopic member 44, and the fifth telescopic member 52 are all hydraulic cylinders.

[0041] The operation process of the formwork support along the goaf: the first left unit support 10 and the first right unit support 10 are the first group of unit supports 10, the second left unit support 10 and the second right unit support 10 are the second group of unit supports 10, and the third left unit support 10 and the third right unit support 10 are the third group of unit supports 10.

[0042] Step 1: The first and second unit supports 10 are in a retracted state, while the third unit support 10 is in an extended state and supporting the top (see...). Figure 2 (The first motion state view shown).

[0043] Step 2: Prepare two templates, insert the hanging rods into the top of the templates, with one hanging rod at the front and one at the back of each template, and place the two templates on the top of the first set of unit supports 10 and the second set of unit supports 10 respectively. The hanging rods overlap in the corresponding grooves, and hang the mold bag on the two templates.

[0044] Step 3: The first set of unit supports 10 and the second set of unit supports 10 are extended and supported, the mold bag is poured and solidified to form two walls (see the second motion state view shown in 3).

[0045] Step 4: Move the first group of unit supports 10, the second group of unit supports 10, and the third group of unit supports 10 in turn, ensuring that at least two of the first group of unit supports 10 are supported. When a group of unit supports 10 moves, it can retract to the lowest point before moving, or it can retract to the point of being detached from the support before moving. The first group of unit supports 10, the second group of unit supports 10, and the third group of unit supports 10 move forward the distance of two walls in several steps until all three groups of unit supports 10 are in a supported state (see the third motion state view shown in 4). Repeat steps 1 to 4.

[0046] The term "sequential movement" refers to the movement of the first group of unit supports 10, followed by the support of the second and third groups of unit supports 10. Then, the second group of unit supports 10 moves, and the first and third groups of unit supports 10 support the support. Finally, the third group of unit supports 10 moves, and the first and second groups of unit supports 10 support the support. The term "multiple movements" can be illustrated by the following example: each of the first, second, and third groups of unit supports 10 moves 1 meter, accumulating a total movement of the distance between two walls.

[0047] When the unit support 10 is moving, taking the third group of unit support 10 as an example (because the third group is the most prone to tipping over), when the third group of unit support 10 moves, the upper part of the third group of unit support 10 detaches from the support. In one embodiment, two first telescopic members 21 are added, and the three first telescopic members 21 connect the third group of unit support 10 to the second group of unit support 10. Among them, the two first telescopic members 21 located at the top, based on the second group of unit support 10, exert a corrective force on the tilted third group of unit support 10. Unlike conventional designs, the two first telescopic members 21 added here are not for reinforcement purposes, but only to generate a corrective effect under certain working conditions to prevent the unit support 10 from tipping over. Under certain working conditions, such as the degree of inclination of the road surface, the pusher 40 can completely control the tilting. As for the case of a support with an inner frame and an outer frame as in the prior art, since the inner frame and the outer frame support each other, there is no tipping problem as in this technical solution. The prior art does not provide the technical inspiration for the corrective design in this technical solution.

[0048] When unit support 10 is moving, taking the third unit support 10 as an example, we will perform a force analysis:

[0049] See Figure 5 When the inclination angle of the roadway surface is relatively small, the support force F of the roadway surface on the third unit support 10 is... N When the torque formed by gravity G and the load reaches equilibrium, the third unit support 10 can stabilize itself. E is the inner lower support point of the third unit support 10. When the center of gravity K of the third unit support 10 passes through point E, the stability of the third unit support 10 reaches its limit. c is the horizontal distance from the center of gravity of the third unit support 10 to point E, and b is the distance from the center of gravity K of the third unit support 10 to the roadway surface. The corresponding relationship is tanα1=c / b. In the example design parameters, c=200mm, b=800mm, and a1 is approximately equal to 14°. That is, when the inclination angle of the roadway surface is less than 14°, the third unit support 10 can stabilize itself.

[0050] See Figure 6 When the inclination angle of the road surface is greater than 14°, a force F is needed to balance its torque. At point E, the torque is taken as FL=G*[(B+A*tana1)*sina1-A / cosa1], where L is the lever arm length of F acting on the third unit support 10, F2 is the force on the first telescopic member 21, and the relationship between F and F2 is F=F2sinr, that is, the corrective force of the first telescopic member 21 is F2, and the third unit support 10 can be stabilized.

[0051] The steps in the method of this invention can be adjusted, combined, or deleted according to actual needs.

[0052] The modules or units in the device of this invention can be merged, divided, or deleted according to actual needs.

[0053] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the invention. Those skilled in the art will understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A formwork support for roadway retention, characterized in that: The system includes a unit support and a reciprocating drive mechanism. The unit support has a first direction of travel, a second direction perpendicular to the first direction, and a third direction perpendicular to both the first and second directions. The unit support can extend or shorten along the third direction. Three groups of unit supports are arranged along the first direction, and two unit supports are arranged in each group along the second direction. Adjacent unit supports in the first direction are connected by the reciprocating drive mechanism. The reciprocating drive mechanism includes at least one first telescopic member, with both ends of the first telescopic member hinged to a unit support on a corresponding side. The unit support includes a top beam, a second telescopic member, and a first sliding shoe. The top beam and the first sliding shoe are connected by the second telescopic member. There are two second telescopic members, arranged along the first direction. The reciprocating drive mechanism includes three first telescopic members, which are parallel to each other. The projection of the three first telescopic members onto the longitudinal plane forms the three vertices of a triangle. The longitudinal plane is a plane perpendicular to the first direction. Both ends of the first telescopic members are hinged to the first sliding shoe on a corresponding side. The two first telescopic members at the top exert a corrective force on the unit support in an inclined state.

2. The formwork support for roadway retention as described in claim 1, characterized in that: Two grooves are provided on the upper surface of the top beam, and the two grooves are located at both ends of the top beam.

3. The formwork support for roadway retention as described in claim 1, characterized in that: The formwork support along the goaf includes a fixed frame, and the six unit supports in the first direction are a first left unit support, a first right unit support, a second left unit support, a second right unit support, a third left unit support, and a third right unit support. One end of the fixed frame is connected to the end of the first slipper of the first left unit support, and the other end of the fixed frame is connected to the end of the first slipper of the first right unit support.

4. The formwork support for roadway retention as described in claim 1, characterized in that: The formwork support for the goaf retention includes a pusher, which includes a shovel plate and two third telescopic components. One third telescopic component has its two ends hinged to the lower part of one side of the shovel plate and the end of the first sliding shoe of the first left unit support, respectively. The other third telescopic component has its two ends hinged to the lower part of the other side of the shovel plate and the end of the first sliding shoe of the first right unit support, respectively.

5. The formwork support for roadway retention as described in claim 4, characterized in that: The pusher includes a second sliding shoe, there are two second sliding shoes, and each third telescopic component has a corresponding second sliding shoe. The second sliding shoe is hinged to the shovel plate and the third telescopic component.

6. The formwork support for roadway retention as described in claim 5, characterized in that: The pusher includes a fourth telescopic component, and each second slipper is provided with a corresponding fourth telescopic component. The fourth telescopic component is hinged to the upper part of the shovel plate and the second slipper.

7. The formwork support for roadway retention as described in claim 3, characterized in that: The formwork support for the goaf retention includes an adjusting component. Each of the first left unit support, the first right unit support, the second left unit support, and the second right unit support has an adjusting component on its inner side. The adjusting component includes a guard plate and a fifth telescopic component. There are several guard plates, which are stacked sequentially and adjacent guard plates are slidably connected. The guard plates are connected to the top beam and the sliding shoe of the unit support through the fifth telescopic component.

8. The formwork support for roadway retention as described in claim 7, characterized in that: The protective plate has a hollow structure.

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