Umbrella-shaped water plugging curtain structure for treating shaft gushing water

Abstract

The utility model discloses an umbrella-shaped water plugging curtain structure for processing shaft gushing water, which comprises a shaft, a concrete inner wall arranged on the shaft, a tunneling layer arranged at the bottom of the shaft, an umbrella-shaped curtain structure arranged on the concrete inner wall of the shaft, and an umbrella-shaped water plugging curtain arranged on the tunneling layer. The umbrella-shaped curtain structure comprises three layers of inclined grouting holes which are formed from top to bottom, wherein each layer of grouting holes are downwards and uniformly distributed in an umbrella shape with the center of a shaft as the axis; the device is simple in structure and convenient to operate, only three layers of inclined grouting holes need to be formed above a tunneling layer to form an umbrella-shaped curtain structure, water gushing from top to bottom of a shaft can be effectively prevented, meanwhile, underground water around a tunneling section is prevented from gushing into the shaft, the construction time is greatly saved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of wellbore water blocking curtain technology, specifically an umbrella-shaped water blocking curtain structure for treating wellbore water inrush. Background Technology

[0002] Mineral resources are essential production materials for my country and the world. With continuous social development, the demand for mineral resources is constantly increasing, and shallow resources are being depleted, leading to the growing popularity of deep mineral resource mining. For mining areas with concentrated ore bodies, great depths, and difficult extraction, vertical shaft development is often adopted. However, during the excavation and lining of ultra-deep vertical shafts, due to the complex and variable strata they traverse, sudden water inrushes frequently occur, posing a significant threat to the safety of personnel and equipment. This also creates major obstacles for shaft excavation and lining construction and increases the economic cost of the project.

[0003] The amount of water inflow in a vertical shaft depends on the properties of the aquifer in the excavated rock mass, the permeability coefficient of the surrounding rock, and the head difference between the inflow point and the groundwater level. The "Technical Specification for Mine Shaft Construction and Drainage" stipulates that during the mine construction period, if the expected water inflow for a vertical shaft is no greater than 10 m³ / h and for an inclined shaft no greater than 5 m³ / h, drainage should be carried out at the working face; if the expected water inflow for a vertical shaft is greater than 10 m³ / h and for an inclined shaft greater than 5 m³ / h, water control measures should be implemented first.

[0004] In existing technologies, water inrush is prevented by creating horizontal and vertical curtains inside the wellbore. The horizontal curtain prevents water from flowing downwards, while the vertical curtain prevents water from flowing into the wellbore. However, this method has the problem of complex structure. It is necessary to drill grouting holes for the horizontal curtain and inclined holes for the vertical curtain in the well, which is difficult to process, time-consuming and labor-intensive. Moreover, drilling a large number of holes in the inner wall of the wellbore seriously affects the strength of the surrounding area of ​​the wellbore.

[0005] To address the aforementioned issues, an umbrella-shaped water-blocking curtain structure for handling wellbore water inflow is proposed. Summary of the Invention

[0006] The purpose of this invention is to solve the above problems by providing an umbrella-shaped water-blocking curtain structure for handling well water inrush.

[0007] The specific solution of this utility model is: an umbrella-shaped water-blocking curtain structure for treating well water inflow, comprising: a well, the well being a vertically downward cylindrical structure, the well having a concrete inner wall, a tunneling layer at the bottom of the well, an umbrella-shaped curtain structure on the concrete inner wall of the well, and the upper end of the umbrella-shaped curtain structure being located above the tunneling layer, the umbrella-shaped curtain structure comprising: three layers of inclined grouting holes arranged from top to bottom: a first layer of inclined grouting holes, a second layer of inclined grouting holes, and a third layer of inclined grouting holes; each layer of grouting holes is evenly arranged downwards in an umbrella shape with the center of the well as the axis; the first layer of inclined grouting holes, the second layer of inclined grouting holes, and the third layer of inclined grouting holes are all filled with cement-water glass double-liquid grout.

[0008] Furthermore, the angle between the first layer of inclined grouting holes and the wellbore is 15°, the angle between the second layer of inclined grouting holes and the wellbore is 30°, and the angle between the third layer of inclined grouting holes and the wellbore is 45°.

[0009] Furthermore, the depth of the tunneling layer is H, the depth of the first layer of inclined grouting holes is L, the depth of the second layer of grouting holes is 2L, and the depth of the third layer of grouting holes is 4L, wherein: H=2L.

[0010] Furthermore, the first layer has 6 inclined grouting holes, the second layer has 6 inclined grouting holes, and the third layer has 12 inclined grouting holes.

[0011] Furthermore, the first layer of inclined grouting holes, the second layer of inclined grouting holes, and the third layer of inclined grouting holes are arranged in a staggered manner.

[0012] Furthermore, the distance between the first layer of inclined grouting holes and the second layer of inclined grouting holes is 1.5-2 meters, and the distance between the second layer of inclined grouting holes and the third layer of inclined grouting holes is 2-3 meters.

[0013] Furthermore, a grout-stopping pad is provided at the top of the tunneling layer.

[0014] This utility model has the following beneficial effects:

[0015] This utility model has a simple structure and is easy to operate. It only requires opening three layers of inclined grouting holes above the tunneling layer to form an umbrella-shaped curtain structure, which can effectively prevent water from flowing down the shaft while preventing groundwater from the surrounding tunneling section from flowing into the shaft, greatly saving construction time and improving work efficiency. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 2 for Figure 1 A top-down view;

[0018] In the diagram: 1. Shaft; 2. Concrete inner wall; 3. First layer inclined grouting hole; 4. Second layer inclined grouting hole; 5. Third layer inclined grouting hole; 6. Excavated layer; 7. Grout stop pad. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] Please refer to Figures 1-2 An umbrella-shaped water-blocking curtain structure for treating water inflow in a well shaft 1 includes: a well shaft 1, which is a vertically downward cylindrical structure; a concrete inner wall 2 provided in the well shaft 1; a tunneling layer 6 provided at the bottom of the well shaft 1; an umbrella-shaped curtain structure provided on the concrete inner wall 2 of the well shaft 1; and the upper end of the umbrella-shaped curtain structure being located above the tunneling layer 6. The umbrella-shaped curtain structure includes: three layers of inclined grouting holes arranged from top to bottom: a first layer of inclined grouting holes 3, a second layer of inclined grouting holes 4, and a third layer of inclined grouting holes 5; each layer of grouting holes is evenly arranged downwards in an umbrella shape with the center of the well shaft 1 as the axis; the first layer of inclined grouting holes 3, the second layer of inclined grouting holes 4, and the third layer of inclined grouting holes 5 are all filled with cement-water glass double-liquid grout.

[0023] In this embodiment, the angle between the first layer of inclined grouting holes 3 and the well shaft 1 is 15°, the angle between the second layer of inclined grouting holes 4 and the well shaft 1 is 30°, and the angle between the third layer of inclined grouting holes 5 and the well shaft 1 is 45°.

[0024] In this embodiment, the depth of the tunneling layer 6 is H, the depth of the first layer of inclined grouting holes 3 is L, the depth of the second layer of grouting holes is 2L, and the depth of the third layer of grouting holes is 4L, wherein: H=2L.

[0025] In this embodiment, there are 6 inclined grouting holes 3 in the first layer, 6 inclined grouting holes 4 in the second layer, and 12 inclined grouting holes 5 in the third layer.

[0026] In this embodiment, the first layer of inclined grouting holes 3, the second layer of inclined grouting holes 4, and the third layer of inclined grouting holes 5 are arranged in a staggered manner.

[0027] In this embodiment, the distance between the first layer of inclined grouting holes 3 and the second layer of inclined grouting holes 4 is 1.5-2 meters, and the distance between the second layer of inclined grouting holes 4 and the third layer of inclined grouting holes 5 is 2-3 meters.

[0028] In this embodiment, a grout-stopping pad 7 is provided on the top of the tunneling layer 6.

[0029] This utility model has the following beneficial effects:

[0030] This utility model has a simple structure and is easy to operate. It only requires opening three layers of inclined grouting holes above the excavation layer 6 to form an umbrella-shaped curtain structure, which can effectively prevent water from flowing down the shaft 1 while preventing groundwater from the surrounding area of ​​the excavation section from flowing into the shaft 1, greatly saving construction time and improving work efficiency.

Claims

1. An umbrella-shaped water-blocking curtain structure for treating wellbore water inrush, comprising: The well shaft is a vertically downward cylindrical structure with a concrete inner wall and a tunneling layer at its bottom. The well shaft is characterized by an umbrella-shaped curtain structure on its concrete inner wall, with the upper end of the umbrella-shaped curtain structure positioned above the tunneling layer. The umbrella-shaped curtain structure comprises three layers of inclined grouting holes arranged from top to bottom: a first layer of inclined grouting holes, a second layer of inclined grouting holes, and a third layer of inclined grouting holes. Each layer of grouting holes is evenly arranged downwards in an umbrella shape, with the center of the well shaft as its axis. The first, second, and third layers of inclined grouting holes are all filled with a cement-water glass double-liquid grout.

2. The umbrella-shaped water-blocking curtain structure for treating wellbore water inflow according to claim 1, characterized in that: The angle between the first layer of inclined grouting holes and the well casing is 15°, the angle between the second layer of inclined grouting holes and the well casing is 30°, and the angle between the third layer of inclined grouting holes and the well casing is 45°.

3. The umbrella-shaped water-blocking curtain structure for treating wellbore water inflow according to claim 1, characterized in that: The depth of the tunneling layer is H, the depth of the first layer of inclined grouting holes is L, the depth of the second layer of grouting holes is 2L, and the depth of the third layer of grouting holes is 4L, wherein: H=2L.

4. The umbrella-shaped water-blocking curtain structure for treating wellbore water inflow according to claim 1, characterized in that: The first layer has 6 inclined grouting holes, the second layer has 6 inclined grouting holes, and the third layer has 12 inclined grouting holes.

5. The umbrella-shaped water-blocking curtain structure for treating wellbore water inflow according to claim 1, characterized in that: The first layer of inclined grouting holes, the second layer of inclined grouting holes, and the third layer of inclined grouting holes are arranged in a staggered manner.

6. The umbrella-shaped water-blocking curtain structure for treating wellbore water inflow according to claim 1, characterized in that: The distance between the first layer of inclined grouting holes and the second layer of inclined grouting holes is 1.5-2 meters, and the distance between the second layer of inclined grouting holes and the third layer of inclined grouting holes is 2-3 meters.

7. The umbrella-shaped water-blocking curtain structure for treating wellbore water inflow according to claim 1, characterized in that: A grout-stopping pad is provided at the top of the tunneling layer.

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