T-shaped waterproof anti-seepage curtain for treating shaft gushing water in water-rich high-seepage-pressure area

Abstract

The utility model relates to a T-shaped waterproof anti-seepage curtain for treating water burst of a shaft in a water-rich high osmotic pressure area, which comprises a shaft which is of a cylinder structure and is provided with a concrete inner wall, the concrete inner wall is provided with a horizontal waterproof curtain, and the horizontal waterproof curtain is used for preventing water from seeping from the upper part of the shaft to the lower part of the shaft; a tunneling layer is arranged at the bottom of the shaft and used for further tunneling of the shaft, and the tunneling layer has the effect of preventing water from seeping into the shaft from the underground. According to the pressure reduction principle of the horizontal waterproof curtain and the conical waterproof curtain, the pressure water head in the shaft tunneling depth range is reduced, the water inflow of the shaft tunneling section is reduced, and the influence of high osmotic pressure on the vertical anti-seepage curtain is reduced; large cracks of a rock mass are plugged through cement and water glass double-liquid grouting of the grouting holes in the upper portion and the lower portion, and small cracks of the rock mass are plugged through chemical grout grouting of the grouting holes in the middle, so that the grouting and water plugging rate of the horizontal waterproof curtain and the vertical anti-seepage curtain is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of a wellbore waterproofing system for treating a water-rich high-osmotic pressure area, in particular to a T-shaped water-isolating and anti-seepage curtain for treating water gushing from a wellbore in a water-rich high-osmotic pressure area. Background Art

[0002] Mineral resources are important production materials that are indispensable in my country and even in the world. With the continuous development of society, the demand for mineral resources continues to increase, and shallow resources are also exhausted. The mining of deep mineral resources has gradually become popular. For mining areas with concentrated ore bodies, deep burial depths, and difficulty in mining, vertical shaft development is often used. During the excavation of ultra-deep vertical shafts, due to the complex and changeable strata passed through, sudden water inrush accidents often occur, which not only poses a great threat to the safety of personnel and equipment, but also brings great obstacles to the excavation and construction of shafts, and increases the economic cost of the project.

[0003] The amount of water inflow in a vertical shaft depends on the nature of the aquifer in the excavated rock mass, the permeability coefficient of the surrounding rock, and the head difference between the water inflow point and the groundwater level. The Technical Specifications for Mine Construction and Drainage stipulate that during the mine construction period, when the estimated water inflow in a vertical shaft is no more than 10m3 / h and the inclined shaft is no more than 5m3 / h, it is advisable to use working face construction drainage; when the estimated water inflow in a vertical shaft is greater than 10m3 / h and the inclined shaft is greater than 5m3 / h, water control should be carried out first.

[0004] The existing mine shaft water control technology mainly adopts ground pre-grouting, shaft working face advance grouting and other methods to intercept shaft water inrush. Its defects are: due to the difficulty of slurry injection and the uncontrollable diffusion direction and range of slurry, it is difficult to form an effective anti-seepage curtain with thickness and depth that meets the requirements and can seal and plug the pore seepage channel, and the ideal anti-seepage and plugging effect cannot be achieved; shaft working face advance grouting is only suitable for low flow and low permeability hydrogeological conditions. For water-rich and high permeability hydrogeological conditions, the effect of grouting and water plugging is often not good because the slurry is difficult to enrich and the pressure is difficult to control. In order to solve the above problems, a T-shaped water-blocking and anti-seepage curtain for treating shaft water inrush in water-rich and high permeability areas is proposed. Summary of the invention

[0005] In order to solve the above problems, a T-shaped water-blocking and anti-seepage curtain is proposed for treating water gushing from wellbore in water-rich and high-osmotic pressure areas.

[0006] The specific scheme of the utility model is: a T-shaped waterproof and anti-seepage curtain for treating water gushing from a wellbore in a water-rich and high-osmotic pressure area, comprising: a wellbore, the wellbore being a cylindrical structure, the wellbore being provided with a concrete inner wall, the concrete inner wall being provided with a horizontal waterproof curtain, the horizontal waterproof curtain being used to isolate water from seeping from the upper part of the wellbore to the lower part; a tunneling layer being provided at the bottom of the wellbore, the tunneling layer being used for further tunneling of the wellbore, and the tunneling layer having the effect of preventing water from seeping from the ground into the wellbore.

[0007] Furthermore, the horizontal water-proof curtain includes: three horizontal grouting layers arranged from bottom to top, and the horizontal grouting layer includes: a number of horizontal grouting holes evenly arranged on the inner wall of the wellbore, and the horizontal grouting holes are horizontally arranged along the radial direction of the wellbore. The horizontal grouting holes located in the middle of the horizontal water-proof curtain are provided with chemical slurry, and the horizontal grouting holes located in the upper and lower parts of the horizontal water-proof curtain are provided with cement-waterglass double liquid slurry.

[0008] Furthermore, the excavation layer is a concrete casting layer, and a conical waterproof curtain is provided on the excavation layer. The conical waterproof curtain is used to prevent water from seeping into the wellbore from the side wall when the wellbore is excavated downward.

[0009] Furthermore, the conical water-blocking curtain comprises:

[0010] A first row of oblique grouting layers, wherein the first row of oblique grouting layers comprises a plurality of first row of grouting holes, the first row of grouting holes being centered on the center line of the shaft and being evenly arranged on a circumference obliquely below the excavation layer, and the angle between the first row of grouting holes and the center line of the shaft is 10°;

[0011] A second row of oblique grouting layers, wherein the second row of oblique grouting layers comprises a plurality of second row of grouting holes, the second row of grouting holes being centered on the center line of the shaft and being evenly arranged on a circumference obliquely below the excavation layer, and the angle between the second row of grouting holes and the center line of the shaft is 20°;

[0012] A third row of oblique grouting layers, the third row of oblique grouting layers comprising a plurality of third row of grouting holes, the third row of grouting holes being centered on the center line of the shaft and uniformly arranged on a circumference obliquely below the excavation layer, and the angle between the third row of grouting holes and the center line of the shaft is 30°;

[0013] Moreover, the first row of grouting holes, the second row of grouting holes and the third row of grouting holes are all filled with cement-waterglass double liquid slurry.

[0014] Furthermore, the height of the bottom horizontal grouting layer is 0.5m-1m from the excavation layer, the distance between the middle horizontal grouting layer and the bottom horizontal grouting layer is 2m-3m, and the distance between the highest horizontal grouting layer and the middle horizontal grouting layer is 2m-3m.

[0015] The utility model has the following beneficial effects:

[0016] 1. First, the pressure head within the wellbore excavation depth range is reduced through the decompression principle of the horizontal waterproof curtain and the conical waterproof curtain in the utility model, the water inflow in the wellbore excavation section is reduced, and the influence of high seepage pressure on the vertical anti-seepage curtain is reduced;

[0017] 2. Secondly, make full use of and give full play to the water holding capacity of the shaft excavation section space, and ensure the safe completion of rock blasting, slag discharge and grouting pad pouring operations in the shaft excavation section under the conditions of water excavation construction;

[0018] 3. Finally, cement-water-glass double-liquid grouting is used to plug large cracks in the rock mass through the upper and lower grouting holes, and chemical slurry grouting is used to plug small cracks in the rock mass through the middle grouting holes, thereby improving the grouting and water blocking rate of the horizontal waterproof curtain and the vertical anti-seepage curtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the utility model;

[0021] In the figure: 1. shaft; 2. inner wall of concrete; 3. horizontal grouting layer; 4. horizontal grouting holes; 5. third row of oblique grouting layer; 6. second row of oblique grouting layer; 7. first row of oblique grouting layer; 8. third row of grouting holes; 9. second row of grouting holes; 10. first row of grouting holes; 11. concrete pouring layer. DETAILED DESCRIPTION

[0022] In the manufacturing industry, equipment that needs to be adjusted in angle is often involved, such as oxygen cutting machine nozzles, laser cutting machine nozzles, automatic paint nozzles, and various equipment that needs to be adjusted in angle. The angle adjustment mechanisms in the prior art are either expensive or complex in structure, and there is no angle adjustment device that can meet the user's adjustment needs. In order to solve the above problems, a T-shaped water-proof and anti-seepage curtain is proposed for treating water gushing from wellbores in water-rich and high-permeability areas. Example

[0023] See also Figure 1-Figure 2 A T-shaped waterproof and anti-seepage curtain for treating water gushing from a wellbore 1 in a water-rich and high-osmotic pressure area, comprising: a wellbore 1, wherein the wellbore 1 is a cylindrical structure, and the wellbore 1 is provided with a concrete inner wall 2, and a horizontal waterproof curtain is provided on the concrete inner wall 2, and the horizontal waterproof curtain is used to block water seepage from the upper part of the wellbore 1 to the lower part; an excavation layer is provided at the bottom of the wellbore 1, and the excavation layer is used for further excavation of the wellbore 1, and the excavation layer has the effect of preventing water from seeping from the ground into the wellbore 1.

[0024] In this embodiment, the horizontal water-proof curtain includes: three horizontal grouting layers 3 arranged from bottom to top, and the horizontal grouting layer 3 includes: a number of horizontal grouting holes 4 evenly arranged on the inner wall of the wellbore 1, and the horizontal grouting holes 4 are arranged horizontally along the radial direction of the wellbore 1. The horizontal grouting holes 4 located in the middle of the horizontal water-proof curtain are provided with chemical slurry, and the horizontal grouting holes 4 located in the upper and lower parts of the horizontal water-proof curtain are provided with cement-waterglass double liquid slurry.

[0025] In this embodiment, the excavation layer is a concrete casting layer 11, and a conical waterproof curtain is provided on the excavation layer. The conical waterproof curtain is used to prevent water from seeping into the wellbore 1 from the side wall when the wellbore 1 is excavated downward.

[0026] In this embodiment, the conical water-blocking curtain comprises:

[0027] A first row of oblique grouting layers 7, wherein the first row of oblique grouting layers 7 comprises a plurality of first row of grouting holes 10, wherein the first row of grouting holes 10 are centered on the center line of the shaft 1 and are evenly arranged on a circumference obliquely below the excavation layer, and an angle between the first row of grouting holes 10 and the center line of the shaft 1 is 10°;

[0028] A second row of oblique grouting layers 6, wherein the second row of oblique grouting layers 6 comprises a plurality of second row of grouting holes 9, wherein the second row of grouting holes 9 are centered on the center line of the shaft 1 and are evenly arranged on a circumference obliquely below the excavation layer, and an angle between the second row of grouting holes 9 and the center line of the shaft 1 is 20°;

[0029] A third row of oblique grouting layers 5, the third row of oblique grouting layers 5 comprising a plurality of third row of grouting holes 8, the third row of grouting holes 8 being centered on the center line of the shaft 1 and uniformly arranged on a circumference obliquely below the excavation layer, and the angle between the third row of grouting holes 8 and the center line of the shaft 1 is 30°;

[0030] Moreover, the first row of grouting holes 10, the second row of grouting holes 9, and the third row of grouting holes 8 are all filled with cement-water-glass double liquid slurry.

[0031] In this embodiment, the height of the bottom horizontal grouting layer 3 from the excavation layer is 0.5 meters to 1 meter, the distance between the middle horizontal grouting layer 3 and the bottom horizontal grouting layer 3 is 2 meters to 3 meters, and the distance between the highest horizontal grouting layer 3 and the middle horizontal grouting layer 3 is 2 meters to 3 meters.

[0032] The utility model has the following beneficial effects:

[0033] 1. First, the pressure head within the excavation depth range of the wellbore 1 is reduced through the decompression principle of the horizontal waterproof curtain and the conical waterproof curtain in the utility model, the water inflow in the excavation section of the wellbore 1 is reduced, and the influence of high seepage pressure on the vertical anti-seepage curtain is reduced;

[0034] 2. Secondly, make full use of and give full play to the water holding capacity of the excavation section of shaft 1, and ensure the safe completion of rock blasting, slag discharge and grouting pad pouring operations in the excavation section of shaft 1 under the condition of water excavation construction;

[0035] 3. Finally, cement-water-glass double-liquid grouting is used to plug large cracks in the rock mass through the upper and lower grouting holes, and chemical slurry grouting is used to plug small cracks in the rock mass through the middle grouting holes, thereby improving the grouting and water blocking rate of the horizontal waterproof curtain and the vertical anti-seepage curtain.

Claims

1. A T-shaped water-blocking and anti-seepage curtain for treating water gushing from a wellbore in a water-rich and high-osmotic pressure area, comprising: A shaft, which is a cylindrical structure, is provided with a concrete inner wall, and is characterized in that: a horizontal waterproof curtain is provided on the concrete inner wall, and the horizontal waterproof curtain is used to isolate water from seeping from the upper part of the shaft to the lower part; an excavation layer is provided at the bottom of the shaft, and the excavation layer is used for further excavation of the shaft, and the excavation layer has the effect of preventing water from seeping from the ground into the shaft.

2. A T-shaped water-blocking and anti-seepage curtain for treating water gushing from a wellbore in a water-rich and high-osmotic pressure area according to claim 1, characterized in that: The horizontal water-proof curtain includes: three horizontal grouting layers arranged from bottom to top, and the horizontal grouting layer includes: a number of horizontal grouting holes evenly arranged on the inner wall of the wellbore, and the horizontal grouting holes are arranged horizontally along the radial direction of the wellbore. The horizontal grouting holes located in the middle of the horizontal water-proof curtain are provided with chemical slurry, and the horizontal grouting holes located in the upper and lower parts of the horizontal water-proof curtain are provided with cement-waterglass double liquid slurry.

3. A T-shaped water-blocking and anti-seepage curtain for treating water gushing from a wellbore in a water-rich and high-osmotic-pressure area according to claim 1, characterized in that: The excavation layer is a concrete casting layer, and a conical waterproof curtain is arranged on the excavation layer. The conical waterproof curtain is used to prevent water from seeping into the wellbore from the side wall when the wellbore is excavated downward.

4. A T-shaped water-blocking and anti-seepage curtain for treating water gushing from a wellbore in a water-rich and high-osmotic-pressure area according to claim 3, characterized in that: The conical water-blocking curtain comprises: A first row of oblique grouting layers, wherein the first row of oblique grouting layers comprises a plurality of first row of grouting holes, the first row of grouting holes being centered on the center line of the shaft and being evenly arranged on a circumference obliquely below the excavation layer, and the angle between the first row of grouting holes and the center line of the shaft is 10°; A second row of oblique grouting layers, wherein the second row of oblique grouting layers comprises a plurality of second row of grouting holes, the second row of grouting holes being centered on the center line of the shaft and being evenly arranged on a circumference obliquely below the excavation layer, and the angle between the second row of grouting holes and the center line of the shaft is 20°; A third row of oblique grouting layers, the third row of oblique grouting layers comprising a plurality of third row of grouting holes, the third row of grouting holes being centered on the center line of the shaft and uniformly arranged on a circumference obliquely below the excavation layer, and the angle between the third row of grouting holes and the center line of the shaft is 30°; Moreover, the first row of grouting holes, the second row of grouting holes and the third row of grouting holes are all filled with cement-waterglass double liquid slurry.

5. A T-shaped water-blocking and anti-seepage curtain for treating water gushing from a wellbore in a water-rich and high-osmotic-pressure area according to claim 2, characterized in that: The height of the bottom horizontal grouting layer from the excavation layer is 0.5m-1m, the distance between the middle horizontal grouting layer and the bottom horizontal grouting layer is 2m-3m, and the distance between the highest horizontal grouting layer and the middle horizontal grouting layer is 2m-3m.

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