Collapse seepage protection structure for coal mine shaft construction

Abstract

The utility model discloses a collapse and seepage protection structure for coal mine shaft construction, and belongs to the technical field of coal mine shaft construction. The collapse and seepage protection structure for coal mine shaft construction comprises an annular supporting assembly and four cover plates, the cover plates are distributed on the periphery of the annular supporting assembly, the annular supporting assembly comprises an outer hoop and an inner hoop, the outer hoop and the inner hoop are arranged to be of an integrated structure, a plurality of hydraulic assemblies are arranged between the outer hoop and the inner hoop, and the hydraulic assemblies are arranged on the outer hoop and the inner hoop. The hydraulic assembly comprises a hydraulic cylinder and a piston connecting rod, and the piston connecting rod is telescopically connected with the hydraulic cylinder. In order to solve the problem that an obvious channel is provided for underground water to permeate into the shaft due to the fact that the outer wall of the coal mine shaft is usually excavated and built in a segmented mode and construction joint seams inevitably exist in the construction process, a hydraulic assembly is used for surrounding a drill rod to form external supporting pressure, and the hydraulic assembly is used for supporting the drill rod. In this way, collapse and seepage of the shaft in a rainwater environment or under the condition of soft soil can be avoided. After the rainy season is finished or construction conditions are met, the cover plates are sequentially disassembled, the joint seams are reinforced through a grouting method, and the cover plates are immediately put back after grouting, so that the grouting pressure can be increased, a grouting material and concrete are fully bonded, backflow of the grouting material is effectively blocked, and the concrete lining compactness is improved. And after the strength of all the connecting seams meets the requirement, the cover plate and the ring support assembly can be disassembled. The problems in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mine shaft construction technical field, concretely is a kind of collapse seepage protection structure for coal mine shaft construction. BACKGROUND

[0002] At present, in the construction of freezing method segmented downhole drilling, due to the pouring of concrete in turn, the hardening degree of new and old concrete is different, and the weak surface of the jointing seam area is formed, the jointing seam has the characteristics of low bonding strength, poor sealing, poor impermeability, etc., which leads to the phenomenon of seepage after the freezing wall of the shaft is thawed, and serious even gushing water accident. Not only threaten the life safety of underground miners, but also bring huge economic losses to coal mining enterprises, so it is necessary to find a method to solve the problem of shaft seepage from the source.

[0003] The outer wall of the coal mine shaft is constructed by the method of segmented excavation and lining, and the construction jointing seam inevitably exists during the construction process, which provides an obvious channel for the infiltration of groundwater into the shaft. In order to improve the waterproof performance of the jointing seam, the existing methods are as follows: (1) improving the bonding strength of the jointing seam, including using high-performance interface agent and surface treatment of the jointing seam; (2) setting a water stop belt across the jointing seam; (3) installing a jointing plate at the interface of the jointing seam.

[0004] Research and practice show that, (1) and (2) two schemes have high requirements for the sealing of lining and soil conditions, and increase the construction difficulty; the third scheme specifically relates to two Chinese invention patents, with publication numbers CN101550833A and CN106522959A, which disclose two kinds of cast-in-place concrete jointing plates and their construction processes. One is to set a jointing plate connected to form a ring or a square between each two segments of cast-in-place concrete jointing seam during segmented construction and grouting, but the grouting method used cannot effectively fill the grout into the water seepage channel between the jointing plate and the concrete contact surface and the pores near it, resulting in poor shaft wall waterproof effect, increased grouting difficulty and other problems; the second method designs a multi-cavity ring-shaped steel structure, which changes the direct contact between new and old concrete to the contact between concrete and steel plate, providing higher connection strength, but the process is complex, the cost is high, and the grouting construction period is long. SUMMARY

[0005] The utility model aims at providing a kind of collapse seepage protection structure for coal mine shaft construction, utilize hydraulic assembly to form an external support pressure around drill rod, can avoid the collapse seepage of shaft in the rain environment or the case of soft soil. After the end of rainy season or after having construction condition, cover plate can be dismantled in turn and jointing seam is reinforced using grouting method, cover plate is reinstalled after grouting, and cover plate and ring support assembly can be removed after the strength of all jointing seams meets the requirements. It has the characteristics of simple process, low cost and short construction period, and can solve the problems in the prior art.

[0006] To achieve the above object, the utility model provides following technical scheme: a coal mine shaft construction is with the collapse seepage protection structure, including ring support subassembly and apron, the apron is distributed in the four around ring support subassembly, apron is provided with four, the ring support subassembly includes outer ring hoop and inner ring hoop, and the outer ring hoop is arranged as integral type structure with the inner ring hoop, wherein, a plurality of hydraulic components are arranged between the outer ring hoop and the inner ring hoop, and can be independently controlled.

[0007] Further, the hydraulic cylinder and the inner ring hoop are connected through bolts, the piston connecting rod extends to the outside through the outer ring hoop, wherein, a lubricating sleeve is arranged between the piston connecting rod and the outer ring hoop.

[0008] Further, one end of the piston connecting rod is provided with a rubber support, the rubber support is connected with the piston connecting rod through internal threads, and the rubber support is attached to the inner side of the apron.

[0009] Further, the inner side of the inner ring hoop is provided with an axle slot, and the both sides of the axle slot are provided with leaf plates.

[0010] Further, the outer surface of the leaf plate is provided with a hole slot, and the leaf plates are connected through a lock bolt.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. The utility model places the apron in the joint gap in the excavated shaft slot, then splices the ring support subassembly from both sides of the drill rod, fixes the leaf plate using the lock bolt after attaching the leaf plate, then adjusts the extension length of the hydraulic component, forms the annular support with the drill rod as the center, and the drill rod extends downward from the inner ring hoop, which does not affect the rotation and deepening of the drill rod, and the ring support subassembly can be removed after the joint gap is grouted and reinforced and the strength meets the requirements.

[0013] 2. Each group of hydraulic components can be independently controlled or removed, the piston connecting rod is supported by the hydraulic cylinder for extension and retraction, the extended piston connecting rod is in contact with the apron placed in the shaft through the rubber support at the front end, and the external support pressure is formed. This can remove the apron one by one for sectional grouting and reinforcement after the rainy season ends or the construction conditions are met, place the apron back immediately after grouting to increase the grouting pressure, make the grouting material and the concrete fully bond, form the surface contact, effectively block the backflow of the grouting material, and improve the compactness of the concrete lining. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall front view of the utility model;

[0015] Figure 2 is a whole overhead view of the present utility model;

[0016] Figure 3 is a hydraulic assembly structure schematic view of the present utility model;

[0017] Figure 4 is a ring support assembly structure schematic view of the present utility model.

[0018] In the figure: 1, ring support assembly; 2, cover plate; 3, hydraulic assembly; 101, outer hoop; 102, inner hoop; 103, leaf plate; 104, lock bolt; 1021, shaft slot; 301, hydraulic cylinder; 302, piston connecting rod; 303, lubricating sleeve; 304, rubber jacking. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present utility model.

[0020] In order to solve the problem that the outer wall of the coal mine shaft is segmented and excavated, and the construction joint inevitably exists in the construction process, which provides an obvious channel for the infiltration of underground water into the shaft. Figures 1-4 The present utility model provides the following solutions:

[0021] A coal mine shaft construction seepage prevention structure, comprising a ring support assembly 1 and a cover plate 2, the cover plate 2 is distributed around the ring support assembly 1, the cover plate 2 is provided with four, the ring support assembly 1 comprises an outer hoop 101 and an inner hoop 102, the outer hoop 101 and the inner hoop 102 are provided as an integral structure, wherein a plurality of hydraulic assemblies 3 are arranged between the outer hoop 101 and the inner hoop 102, the hydraulic assembly 3 comprises a hydraulic cylinder 301 and a piston connecting rod 302, the piston connecting rod 302 is connected with the hydraulic cylinder 301 in an extension and retraction mode, the inner side of the inner hoop 102 is provided with a shaft slot 1021, the two sides of the shaft slot 1021 are provided with leaf plates 103, the outer surface of the leaf plate 103 is provided with a hole slot, and the leaf plates 103 are connected through a lock bolt 104;

[0022] First, with the help of the drilling rig, drill the coal mine shaft, and place the cover plate 2 at the joint gap formed by the concrete lining as the drill rod penetrates. Then, splice the ring support assembly 1 from both sides of the drill rod. After the page plate 103 is attached, use the lock bolt 104 to fix it. Then adjust the extension length of the hydraulic assembly 3 to form a ring-shaped support centered on the drill rod. The drill rod extends downward from the inner ring 102 without affecting the rotation and penetration of the drill rod. After the joint gap is grouted and reinforced, the ring support assembly 1 can be removed.

[0023] The hydraulic cylinder 301 is connected to the inner ring 102 by bolts, and the piston connecting rod 302 extends to the outside through the outer ring 102. A lubricating sleeve 303 is provided between the piston connecting rod 302 and the outer ring 101. The piston connecting rod 302 has a rubber support 304 at one end, which is connected to the piston connecting rod 302 by internal threads. The rubber support 304 is attached to the inside of the cover plate 2.

[0024] Each hydraulic assembly 3 can be independently controlled for extension and retraction. The piston connecting rod 302 extends and retracts with the hydraulic cylinder 301 as support. The extended piston connecting rod 302 contacts the cover plate 2 placed inside the shaft through the rubber support 304 at the front end. The hydraulic assembly 3 forms an external support pressure around the drill rod, which can prevent the shaft from collapsing in a rainy environment or soft soil conditions.

[0025] After the rainy season ends or construction conditions are met, remove the cover plate 2 one by one for sectional grouting and reinforcement. After grouting, immediately place the cover plate 2 back to increase the grouting pressure, so that the grouting material and concrete are fully bonded, forming a surface contact that effectively blocks the backflow of grouting material and improves the compactness of the concrete lining. When the joint gap strength meets the design requirements, the ring support assembly 1 can be removed.

[0026] The working principle is that the coal mine shaft is drilled by the drilling machine, the cover plate 2 is placed at the joint gap formed by the concrete lining with the deepening of the drill rod, then the ring support assembly 1 is spliced from both sides of the drill rod, the lock bolt 104 is used to fix after the page plate 103 is attached, then the extension length of the hydraulic assembly 3 is adjusted, each group of hydraulic assemblies 3 can be independently controlled in extension and contraction, the piston connecting rod 302 is supported in extension and contraction by the hydraulic cylinder 301, the piston connecting rod 302 extended out is in contact with the cover plate 2 placed in the shaft through the front end rubber support 304, a external supporting pressure is formed around the drill rod by the hydraulic assembly 3, so that the shaft collapse and seepage can be avoided in the rain environment or the soft soil condition. After the rain season ends or the construction condition is met, the cover plates 2 are removed one by one for sectional grouting reinforcement, the cover plate 2 is placed back immediately after grouting to increase the grouting pressure, so that the grouting material is fully bonded with the concrete to form surface contact, effectively block the grouting material backflow, and improve the compactness of the concrete lining. After the joint gap strength meets the design requirements, the ring support assembly 1 can be removed.

[0027] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0028] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments change, modify, replace, and vary in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A collapse and seepage protection structure for coal mine shaft construction, characterized in that, The device includes a ring support assembly (1) and a cover plate (2). The cover plate (2) is distributed around the ring support assembly (1). There are four cover plates (2). The ring support assembly (1) includes an outer ring hoop (101) and an inner ring hoop (102). The outer ring hoop (101) and the inner ring hoop (102) are set as an integral structure. Multiple hydraulic components (3) are arranged between the outer ring hoop (101) and the inner ring hoop (102). The hydraulic components (3) include a hydraulic cylinder (301) and a piston connecting rod (302). The piston connecting rod (302) is telescopically connected to the hydraulic cylinder (301).

2. The collapse and seepage protection structure for coal mine shaft construction according to claim 1, characterized in that: The hydraulic cylinder (301) is bolted to the inner ring (102), and the piston rod (302) extends through the outer ring (101) to the outside. A lubricating sleeve (303) is provided between the piston rod (302) and the outer ring (101).

3. The collapse and seepage protection structure for coal mine shaft construction according to claim 2, characterized in that: One end of the piston connecting rod (302) is provided with a rubber top support (304), which is connected to the piston connecting rod (302) by an internal thread. The rubber top support (304) is in contact with the inner side of the cover plate (2).

4. The collapse and seepage protection structure for coal mine shaft construction according to claim 1, characterized in that: The inner ring (102) is provided with a shaft groove (1021) on the inner side, and a leaf plate (103) is provided on both sides of the shaft groove (1021).

5. The collapse and seepage protection structure for coal mine shaft construction according to claim 4, characterized in that: The outer surface of the page plate (103) is provided with holes and grooves, and the page plates (103) are connected by bolts (104).

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