A horizontal hole vertical hydraulic grooving system and a method for constructing a water-cutting curtain

Abstract

The present invention discloses a horizontal hole vertical hydraulic grooving system and a method for constructing a water-cutting curtain. The horizontal hole vertical hydraulic grooving system consists of an axially connected in-hole grooving assembly and a double-layer drill pipe; the in-hole grooving assembly is provided with a water-passing and slag-discharging assembly, and a high-pressure perforation angle adjustment assembly is hinged on the water-passing and slag-discharging assembly. The double-layer drill pipe is axially connected to the water-passing and slag-discharging assembly to open a high-pressure water channel and a slag-discharging channel; the high-pressure perforation angle adjustment assembly adjusts the orientation of the grooving, cuts a vertical grooving section along the horizontal hole, and then fills and grouts to construct a water-cutting curtain. The present invention solves the problem that the construction depth of the ground grooving and grouting curtain is too shallow, and solves the problem that the drilling and grouting curtain performs high-pressure grouting in the shallow part, which damages the surface and causes secondary engineering geological disasters. In particular, it fills the gap in the construction technology of shallow-buried deep bedrock curtains, making it possible to achieve shallow-buried deep bedrock curtains that cannot be solved by ground grooving and grouting curtains and underground drilling and grouting curtains.

Description

Technical Field

[0001] The present invention relates to the technical field of curtain construction, and in particular to a horizontal hole vertical hydraulic grooving system and a method for constructing a water-cutting curtain. Background Art

[0002] During the production process of coal and non-coal mines, underground and open-pit mines, as well as during the construction of water conservancy, hydropower, environmental protection, and municipal projects, all underground excavation involves varying degrees of exposure or disturbance of underground aquifers and surface water bodies. This can lead to the influx of groundwater and surface water into underground production spaces, causing water inrush. This can impact production at best and cause casualties at worst. Coal mines face the most serious water hazards. To effectively control mine water inrush and ensure mine water safety, coal mines primarily implement "exploration, prevention, blocking, drainage, drainage, interception, and monitoring." Interception primarily involves various surface and underground water interception measures, primarily water curtains. By constructing water curtain walls, underground aquifers and surface water are blocked from entering the underground space through lateral recharge, reducing drainage costs and maintaining the water level outside the curtain walls. This benefits both mine production and water resource and ecological protection. For underground coal mines, the primary approach is to intercept lateral recharge from the coal seam roof and floor aquifers to the mine and tunnel systems, as exemplified by the drilling and grouting lateral curtains used in coal mines like Zhangjiamao and Zhuxianzhuang. For open-pit coal mines, the primary approach is to use cutoff curtains to block lateral recharge from unconsolidated layer water and surface water to the mine. For example, the Zanihe open-pit mine uses curtains to intercept and reduce lateral recharge from the Hailar River, while the Yuanbaoshan open-pit mine uses lateral curtains to intercept and reduce lateral recharge from the Yingjin River and unconsolidated aquifers. Cutoff curtains have become a common and effective method for artificial groundwater intervention, widely used in coal mining, non-coal mining, water conservancy and hydropower, municipal administration, and environmental protection.

[0003] Among existing water-cutting curtain wall construction technologies, ground-based slotted grouting methods such as underground continuous walls, jet grouting piles, and interlocking piles are only suitable for open-pit mines, urban deep foundation pits, and landfills, with construction depths generally less than 60 meters. Drilled high-pressure splitting grouting curtains primarily construct vertical or horizontal holes in the ground, injecting slurry into the rock formation using a grouting pump. This creates a fully or semi-enclosed, bottom-drop, or suspended water-cutting curtain, suitable for deeper curtain construction. Because my country is primarily based on underground coal mining, which accounts for over 80% of production capacity, and especially with the shift of coal production to the west, drilled grouting curtains are the primary method for water-cutting curtain construction. However, these methods often suffer from unclear splitting locations and unclear splitting effects. Furthermore, splitting the high-porosity, microporous, and thick sandstone formations that are widely distributed in western my country's mining areas is difficult, inefficient, and expensive, and the splitting grouting effect fails to meet project requirements.

[0004] Generally speaking, the applicable depth of ground slot grouting curtain is too shallow, the drilling grouting curtain has low water cutoff rate, wide slurry diffusion range, large grouting project volume, large amount of grouting materials, high cost, and cannot form a continuous curtain wall. In addition, there is a problem that the diffusion range in porous rock formations is very small and it is impossible to construct an effective water cutoff curtain.

[0005] Purpose of the Invention

[0006] The purpose of the present invention is to provide a horizontal hole vertical hydraulic grooving system and a method for constructing a water-cutting curtain, which can effectively solve the problems of the existing drilling and grouting curtain, such as the uncontrollable slurry diffusion range, large amount of grouting materials, high project cost, difficulty in ensuring the continuity of the curtain body, and small slurry diffusion range in porous rock formations, and can improve the continuity and anti-seepage performance of the curtain wall.

[0007] To achieve the above-mentioned purpose, the technical solutions adopted by the present invention include:

[0008] A horizontal hole vertical hydraulic grooving system consists of an axially butted in-hole grooving assembly and a double-layer drill pipe; the in-hole grooving assembly is provided with a water-through and slag-discharging assembly, and a high-pressure perforation angle adjustment assembly is hinged on the water-through and slag-discharging assembly. The double-layer drill pipe is axially butted with the water-through and slag-discharging assembly to open up a high-pressure water channel and a slag-discharging channel; the high-pressure perforation angle adjustment assembly adjusts the orientation of the grooving, cuts a vertical groove section along the direction of the horizontal hole, and then performs filling and grouting to construct a water-cutting curtain.

[0009] Optionally, one end of the double-layer drill pipe is axially connected to a first porous channel joint, and the other end is axially connected to a second porous channel joint; adjacent double-layer drill pipes are axially connected through the first porous channel joint and the second porous channel joint to form a sealed connection body, the main body of the double-layer drill pipe is the rod body, the outer wall of the double-layer drill pipe is outside the rod body, and the inner wall of the double-layer drill pipe is inside the rod body, forming a slag discharge cavity.

[0010] Optionally, a first porous channel joint, whose evenly distributed first high-pressure water channel passes high-pressure water and is connected to the outer wall of the double-layer drill pipe through a first connecting thread, and a first slag discharge channel set at the central axis position is connected to the rod cavity of the double-layer drill pipe and is sealed with the inner wall of the double-layer drill pipe.

[0011] Optionally, the second porous channel joint has a uniformly distributed third high-pressure water channel which also passes high-pressure water and is connected to the outer wall of the double-layer drill pipe through a third connecting thread, and the second slag discharge channel set at the central axis position is connected to the inner wall of the double-layer drill pipe.

[0012] Optionally, the water-passing and slag-discharging assembly includes a third porous channel joint, an articulated distributor, an actuator and a slag-discharging unit connected in sequence along the axial direction, and the third porous channel joint is connected to the double-layer drill pipe; the high-pressure perforation angle adjustment assembly is provided with a high-pressure water follower connecting rod and an active connecting rod, and the high-pressure water follower connecting rod and the active connecting rod are respectively articulated on the articulated distributor and the actuator, and the ends of the high-pressure water follower connecting rod and the active connecting rod are articulated to each other; at the same time, a high-pressure water channel is provided in the high-pressure water follower connecting rod, and a jet nozzle is provided at the end, and is connected to the high-pressure water channel.

[0013] Optionally, a roller is further provided at the upper end of the high-pressure water follower connecting rod.

[0014] Optionally, the actuator is provided with an actuator column with a cylindrical cavity inside, an actuator guide rail is provided axially on the side wall, a built-in hydraulic cylinder is provided inside, the active connecting rod is hinged to the built-in hydraulic cylinder, and a guide is provided at the end of the built-in hydraulic cylinder, and the guide slides along the actuator guide rail driven by the built-in hydraulic cylinder.

[0015] Optionally, the slag discharge unit is arranged in the slag discharge unit shell, and the actuator column is axially connected to the slag discharge unit shell; the slag discharge unit includes a hydraulic device and a spiral slag discharge short section arranged along the axial direction, and an axial connecting sleeve is arranged outside the spiral slag discharge short section.

[0016] Optionally, the articulated distributor is a cylindrical component with a cylindrical cavity in the middle, a second annular porous channel at one end connected to it, and multiple first porous channels buried in the wall at the other end, and a high-pressure water annular groove buried at the ends of the multiple first porous channels, and a hinge hole embedded in the wall for hingedly connecting the high-pressure water follower rod; a built-in channel is also embedded in the wall for connecting the built-in hydraulic cylinder; the high-pressure water follower rod is connected at the hinge hole, and the high-pressure water annular groove is connected to the built-in channel and the hinge hole in sequence, and high-pressure water enters the high-pressure water channel in the high-pressure water follower rod along the above-mentioned channel; the second porous channel is connected to the actuator column, and the first porous channel is connected to the third porous channel joint.

[0017] A method for constructing a ground horizontal hole vertical grooving filling type water cutoff curtain is implemented using any of the horizontal hole vertical hydraulic grooving systems described in the present invention, specifically comprising:

[0018] Based on the horizontal hole vertical slotting system composed of in-hole slotting components and double-layer drill pipe, vertical slot sections are cut along the horizontal hole direction and then filled with grouting to construct a water cutoff curtain. The specific steps include the following:

[0019] Step 1: Based on geological conditions, hydrogeological conditions, rock formation characteristics and mechanical properties, select the lateral curtain type, formulate a curtain construction plan, divide the curtain slot sections and construction sequence, and determine the ground directional drilling hole opening location and branch hole layer position;

[0020] Step 2: Use a surface drilling rig to construct a directional horizontal borehole. First, construct the vertical hole section, then the inclined hole section. Then, according to the slot section construction sequence and branch hole layer position, construct the horizontal hole section to the designed position.

[0021] Step 3: Use the horizontal hole vertical hydraulic grooving system to perform the first sequence slot construction, bring out the drilling device, then install the horizontal hole vertical hydraulic grooving system and lower it to the end of the constructed horizontal hole section, perform the first backward high-pressure water jet grooving, then advance the horizontal hole vertical hydraulic grooving system again to the end of the horizontal hole section, then perform the second backward high-pressure water jet grooving, completing the grooving construction of the first sequence slot section, and then bring out the dedicated grooving system;

[0022] Step 4: Use the grouting system to fill and grout the first sequence trench section;

[0023] Step 5: Use the horizontal hole vertical hydraulic grooving system to perform grooving construction of the second sequence grooving section; repeat the method of step 3 to complete the grooving construction of the second sequence grooving section;

[0024] Step 6: Use the grouting system to fill and grout the second sequence trench section;

[0025] Step 7: Repeat steps 3 to 6 to complete the construction of all first-order and second-order slot sections of a set of ground directional drilling holes to form a complete curtain wall;

[0026] Step 8: Repeat steps 2 to 7 to construct subsequent ground directional drilling holes and groove filling and grouting until all curtain walls of the curtain construction plan are completed and a complete curtain is constructed.

[0027] Advantages of the present invention include:

[0028] Wide range of applicable depths: The system and construction method described in the present invention can be used for grooving, filling and grouting in any rock layer, from shallow to ultra-deep, as long as directional drilling is possible. The applicable depth range is from tens of meters to several thousand meters. This solves the problem of shallow depths for ground-grooving grouting curtain construction, and also solves the problem of high-pressure grouting at shallow depths damaging the ground, which can cause secondary engineering geological disasters. In particular, it fills the gap in curtain construction technology for shallow-buried deep bedrock layers, making it possible to construct curtains in shallow-buried deep bedrock layers, which cannot be solved by ground-grooving grouting curtains or underground drilling grouting curtains.

[0029] Applicable to many strata: The system and construction method of the present invention can be applied to major strata such as weathered bedrock, sandstone, sandy mudstone, and carbonate. Its stratum applicability is superior to the ground slotting and grouting curtain construction method that is only applicable to loose layers. It is also superior to the drilling and grouting curtain construction method that is only applicable to carbonate layers and sandstone layers with relatively developed fractures. It is particularly suitable for the construction of water-cutting curtains in thick sandstone aquifers with high porosity and microporous structure in the roof of coal seams in western mining areas of my country. It can significantly reduce the amount of water inflow in mines, reduce the cost of mine drainage, weaken the abnormal peak water inflow that may occur in mines, and ensure the safety of mine water prevention and control, thereby achieving the purpose of reducing momentum, eliminating peaks, increasing efficiency, and ensuring safety, and providing guarantees for the safe and green mining of coal seams in western mining areas.

[0030] Good engineering control effect: The system and construction method of the present invention can control the slurry mainly in the artificial underground trough space, and only a small amount of slurry diffuses into the rock formations around the trough through the original cracks. The grouting volume is controllable as a whole, avoiding the disadvantages of disordered diffusion of drilling grouting curtain slurry, excessive ineffective grouting volume, and high material cost.

[0031] The overall wall has good anti-seepage properties: the system and construction method described in the present invention can achieve seamless overlap between the curtain walls of several directional drilling groups, and the water-cutting curtain wall has good integrity and good anti-seepage effect, avoiding the problem of poor curtain integrity caused by the slurry of the drilling and grouting curtain mainly spreading along the direction of the original main cracks or the direction of the artificial cracks split by high pressure, and excessive grouting in some places and ineffective grouting in other places. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the horizontal hole vertical hydraulic grooving system of the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the structure of the slotted hole component;

[0034] Figure 3 for Figure 2 Schematic diagram of the structure of the middle slag discharge unit;

[0035] Figure 4 for Figure 1 Schematic diagram of the double-layer drill pipe structure;

[0036] Figure 5 for Figure 4 Schematic diagram of the connection enlargement structure in FIG;

[0037] Figure 6 for Figure 4 A schematic diagram of the first porous channel joint structure;

[0038] Figure 7 for Figure 4Schematic diagram of the second porous channel joint structure;

[0039] Figure 8 Schematic diagram of the structure of the articulated distributor 2 in the present invention;

[0040] Figure 9 This is a general diagram of the method for constructing the water-cutting curtain of the present invention;

[0041] Figure 10 The first backward high-pressure water jet grooving of the present invention;

[0042] Figure 11 The second backward high-pressure water jet grooving of the present invention;

[0043] Figure 12 The second sequence slot section of the present invention is a backward high-pressure water jet slotting method;

[0044] 1-Double-layer drill pipe, 11-First porous channel joint, 111-First high-pressure water channel, 112-First connecting thread, 113-First slag discharge channel; 12-Double-layer drill pipe outer wall, 13-Double-layer drill pipe inner wall, 14-Sealing connector, 141-First sealing gasket, 142-Second sealing gasket, 143-Second high-pressure water channel, 144-Second connecting thread; 15-Second porous channel joint, 151-Third high-pressure water channel, 152-Third connecting thread, 153-Second slag discharge channel;

[0045] 2-in-hole slot assembly; 21-third porous channel joint, 22-articulated distributor, 22-1 first porous channel, 22-2 high-pressure water annular groove, 22-3 hinged hole, 22-4 second porous channel, 22-5 built-in channel, 22-6 fourth high-pressure water channel; 23-high-pressure water follower connecting rod, 24-built-in hydraulic cylinder, 25-active connecting rod, 26-roller, 27-jet nozzle, 28-pin, 29-nozzle hinge, 210-connecting rod pin, 211-drill bit, 212-slag discharge unit, 2121-hydraulic device, 2122-spiral slag discharge short section, 2123-axial connecting sleeve; 213-slag discharge unit housing, 2131-water flow channel; 214-guide, 215-actuator guide rail, 216-actuator column, 217-tool facing angle meter. DETAILED DESCRIPTION

[0046] The technical solution of the present invention is described in detail below with reference to specific embodiments and drawings.

[0047] Combine Figure 1-8The present invention discloses a horizontal hole vertical hydraulic grooving system, consisting of an axially butted in-hole grooving assembly 2 and a double-layer drill pipe 1. Vertical grooves are cut along the horizontal hole and then filled and grouted to form a water-cutting curtain. The horizontal hole vertical hydraulic grooving system can adjust the groove orientation based on the tool face angle. The drill string is driven by a top drive on a surface drilling rig to achieve tool face angle adjustment, ensuring the horizontal hole is slotted in the vertical direction.

[0048] One end of the double-layer drill pipe 1 is axially connected to a first porous channel joint 11, and the other end is axially connected to a second porous channel joint 15; adjacent double-layer drill pipes 1 are axially connected through the first porous channel joint 11 and the second porous channel joint 15 to form a sealed connection body, the main body of the double-layer drill pipe 1 is the rod body, the outside of the rod body is the double-layer drill pipe outer wall 12, and the inside of the rod body is the double-layer drill pipe inner wall 13. The cavity formed by the double-layer drill pipe inner wall 13 is the main slag discharge cavity; the first porous channel joint 11, its evenly distributed first high-pressure water channel 111 passes high-pressure water and is connected to the double-layer drill pipe outer wall 12 through the first connecting thread 112. The first slag discharge channel 113 set at the central axis position is connected to the rod cavity of the double-layer drill pipe 1 and is sealed with the double-layer drill pipe inner wall 13 at the same time. The second porous channel joint 15, with its evenly distributed third high-pressure water channels 151 also passing high-pressure water, connects to the double-layer drill pipe outer wall 12 via third connecting threads 152. A second slag discharge channel 153, located at the central axis, communicates with the double-layer drill pipe inner wall 13, opening up the slag discharge channel and forming a seal with the double-layer drill pipe inner wall 13. The connection between the first porous channel joint 11 and the second porous channel joint 15 is respectively provided with a first sealing gasket 141 and a second sealing gasket 142 to form a joint seal. The two are connected by a second connecting thread 144, and the second high-pressure water channel 143 is opened.

[0049] The in-hole slotting assembly 2 includes a third porous channel joint 21, an articulated distributor 22, an actuator and a slag discharge unit 212 connected in sequence along the axial direction. The structure of the third porous channel joint 21 is the same as that of the first porous channel joint 11, and is connected to the second porous channel joint 15 at the end of the double-layer drill pipe 1; a high-pressure water follower link 23 and an active link 25 are respectively hingedly arranged on the articulated distributor 2 and the actuator, and the ends of the high-pressure water follower link 23 and the active link 25 are hinged to each other, specifically through a connecting rod pin 210; at the same time, a high-pressure water channel is arranged in the high-pressure water follower link 23, and a jet nozzle 27 is arranged at the end. The jet nozzle 27 is installed at the end of the high-pressure water follower link 23 through a pin 28 and a nozzle articulator 29, and is connected to the high-pressure water channel inside it. The jet grouting area of ​​the in-hole slotting assembly 2 is located in front of the jet nozzle 27. The high-pressure slurry accumulated in the jet system passes through the high-pressure water channel and is ejected through the jet nozzle 27. The high-pressure liquid is sprayed to cut the rock in front to form a jet grouting area; a roller 26 is also provided on the upper end of the high-pressure water follower connecting rod 23, which can contact the rock and protect the jet nozzle 27.

[0050] The actuator is provided with an actuator cylinder 216, which has a cylindrical cavity inside. An actuator guide rail 215 is axially arranged on the side wall. The internal hydraulic cylinder 24 is installed inside. The active connecting rod 25 is hinged to the internal hydraulic cylinder 24. A guide 214 is provided at the end of the internal hydraulic cylinder 24. Driven by the internal hydraulic cylinder 24, the guide 214 slides along the actuator guide rail 215, thereby driving the active connecting rod 25 to move axially, achieving adjustment of the injection angle of the jet nozzle 27. The slag discharge unit 212 is arranged in the slag discharge unit housing 213, and the actuator cylinder 216 is axially connected to the slag discharge unit housing 213. The slag discharge unit 212 includes an axially arranged hydraulic device 2121 and a spiral slag discharge sub 2122. The spiral slag discharge sub 2122 is outer-mounted with an axial connecting sleeve 2123. High-pressure water enters hydraulic unit 2121 through water channel 2131 of discharge unit housing 213. The high-pressure water propels the spiral blades of hydraulic unit 2121, driving the shaft to rotate. The liquid's rotational force is converted into shaft power, which drives the coaxial spiral discharge sub 2122 to rotate, transporting drill cuttings from around drill bit 211 and discharging them through the internal discharge channel of double-layer drill pipe 1. The cuttings are drawn into the inner bore of drill bit 211 and into discharge unit 212. After passing through the spiral, they enter the cavity of actuator cylinder 216, then into the second porous channel 22-4 of articulated flow distributor 22, and finally into the internal cavity channel of double-layer drill pipe 1. Hydraulic unit 2121 and spiral discharge sub 2122 rotate coaxially, but their blades rotate in opposite directions, ensuring that the high-pressure water flow drives the shaft to rotate. This allows spiral discharge sub 2122 to rotate in opposite directions, achieving opposite discharge.

[0051] The articulated flow distributor 22 is a cylindrical component with a central cylindrical cavity. A second, annular, porous channel 22-4 is connected to it at one end. Multiple first porous channels 22-1 are embedded in the wall at the other end. High-pressure water annular grooves 22-2 are embedded at the ends of these channels. A hinge hole 22-3 is embedded in the wall for articulating the high-pressure water follower link. A built-in channel 22-5 is also embedded in the wall for connecting to the built-in hydraulic cylinder 24 and supplying oil to the hydraulic cylinder. The high-pressure water follower link 3 is connected to the hinge hole 22-3. The high-pressure water annular groove 22-2 is connected to the built-in channel 2-5 and the hinge hole 22-3, respectively. High-pressure water flows along these channels into the high-pressure water channel in the high-pressure water follower link 23, which is the high-pressure water channel GT. The second porous channel 22-4 is connected to the actuator cylinder 216, and the first porous channel 22-1 is connected to the third porous channel joint 21.

[0052] Combine Figure 9-12 The method for constructing a water-cutting curtain by vertical grooving and filling in a horizontal hole on the ground of the present invention is based on a horizontal hole vertical grooving system composed of an in-hole grooving component 2 and a double-layer drill pipe 1. The vertical grooving section is cut along the direction of the horizontal hole and then filled and grouted to construct a water-cutting curtain. Figure 1This is the general diagram of the lateral curtain construction method. Horizontal directional drilling is first performed using a surface top-drive drilling rig (d) and a surface high-pressure pump station (c). Horizontal branch holes are then drilled sequentially at locations f1-1 and f1-2. Using the matching drilling tool (e) and the horizontal hole hydraulic slotting system (g), hydraulic slotting is performed at locations f1-1 and f1-2. Repeat this process by drilling horizontal branch holes at locations f2-1 and f2-2. Using the matching drilling tool (e) and the horizontal hole hydraulic slotting system (g), hydraulic slotting is performed at locations f2-1 and f2-2. Finally, the slotting process for the first section of the underground vertical curtain (f) is completed, and the wall is grouted. The surface top-drive drilling rig (d) and the surface high-pressure pump station (c) are then moved to construct the first section of the underground vertical curtain wall (a) and the second section of the underground vertical curtain wall (b). New curtain walls can also be constructed simultaneously at multiple drilling locations.

[0053] The specific steps include:

[0054] Step 1: Based on geological conditions, hydrogeological conditions, rock formation characteristics and mechanical properties, select the lateral curtain type, formulate a curtain construction plan, divide the curtain slot sections and construction sequence, and determine the ground directional drilling hole opening location and branch hole layer position.

[0055] Step 2: Use a surface drilling rig to construct a directional horizontal borehole. First, construct the vertical hole section, then the inclined hole section. Then, according to the slot section construction sequence and branch hole layer position, construct the horizontal hole section to the designed position.

[0056] Step 3: Use the dedicated grooving system to perform grooving construction on the first sequence slot section. Pull out the drilling device, then install the horizontal hole vertical hydraulic grooving system and lower it to the end of the constructed horizontal hole section. Perform the first backward high-pressure water jet grooving. Then, advance the grooving system to the end of the horizontal hole section again. Open the active and follower connecting rods of the dedicated grooving system. Then, perform the second backward high-pressure water jet grooving. Complete the grooving construction of the first sequence slot section. Then, pull out the dedicated grooving system.

[0057] Step 4: Use the grouting system to fill and grout the first sequence trench section;

[0058] Step 5: Use a dedicated grooving system to cut the second slot section; repeat the steps in step 3 to complete the second slot section.

[0059] Step 6: Use the grouting system to fill and grout the second sequence trench section;

[0060] Step 7: Repeat steps 3 to 6 to complete the construction of all first-order and second-order slot sections of a set of ground directional drilling holes to form a complete curtain wall;

[0061] Step 8: Repeat steps 2 to 7 to construct subsequent ground directional drilling holes and groove filling and grouting until all curtain walls of the curtain construction plan are completed and a complete curtain is constructed.

[0062] The system and construction method of the present invention can be used for slotting, filling, and grouting in any rock formation suitable for directional drilling, from shallow to ultra-deep bedrock, with applicable depths ranging from tens of meters to several thousand meters. This solves the problem of shallow depths being too applicable for ground slotting and grouting curtain construction, as well as the problem of high-pressure grouting at shallow depths damaging the ground, which can cause secondary engineering geological hazards. In particular, it fills a gap in the technology for constructing curtains in shallow bedrock layers, making it feasible to construct curtains in shallow bedrock layers, a problem that both ground slotting and grouting curtains and underground drilling and grouting curtains cannot.

[0063] The system and construction method of the present invention are applicable to major strata such as weathered bedrock, sandstone, sandy mudstone, and carbonate. Its stratum applicability is superior to the ground slotting and grouting curtain construction method, which is only applicable to loose layers. It is also superior to the drilling and grouting curtain construction method, which is only applicable to carbonate layers and sandstone layers with relatively developed fractures. It is particularly suitable for the construction of water-cutting curtains in thick sandstone aquifers with high porosity and microporous structures in the roof of coal seams in western my country. It can significantly reduce mine water inflow, lower mine drainage costs, mitigate abnormal peak water inflow that may occur in mines, and ensure mine water safety, thereby achieving the goals of reducing momentum, eliminating peaks, increasing efficiency, and ensuring safety, providing a guarantee for safe and green mining of coal seams in western mining areas.

[0064] The system and construction method of the present invention can control the slurry mainly in the space of the artificial underground trough section, and only a small amount of slurry diffuses into the rock formations around the trough section through the original cracks. The grouting volume is controllable as a whole, avoiding the disadvantages of disordered diffusion of drilling grouting curtain slurry, excessive ineffective grouting volume, and high material cost.

[0065] The system and construction method of the present invention can achieve seamless overlap between the curtain walls of several directional drilling groups, and the water-cutting curtain wall has good integrity and good anti-seepage effect, avoiding the problem of poor curtain integrity caused by the slurry of the drilling and grouting curtain mainly spreading along the direction of the original main cracks or the direction of the artificial cracks split by high pressure, and excessive grouting in some places and ineffective grouting in other places.

[0066] The preferred embodiments of the present disclosure are described in detail above. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0067] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0068] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A horizontal hole vertical hydraulic grooving system, characterized in that: It consists of an axially butted in-hole slotted component (2) and a double-layer drill rod (1); The in-hole slotting assembly (2) is provided with a water-passing and slag-discharging assembly, a high-pressure perforation angle adjustment assembly is hingedly connected to the water-passing and slag-discharging assembly, and the double-layer drill pipe (1) is axially connected to the water-passing and slag-discharging assembly to open a high-pressure water channel and a slag-discharging channel; The high-pressure perforation angle adjustment component adjusts the slot orientation, cuts vertical slot sections along the horizontal hole direction, and then fills and grouts them to build a water-cutting curtain. The water-passing and slag-discharging assembly comprises a third porous channel joint (21), an articulated flow distributor (22), an actuator and a slag-discharging unit (212) which are sequentially connected along the axial direction, and the third porous channel joint (21) is connected to the double-layer drill pipe (1); the high-pressure perforation angle adjustment assembly is provided with a high-pressure water follower connecting rod (23) and an active connecting rod (25); the high-pressure water follower connecting rod (23) and the active connecting rod (25) are respectively articulated on the articulated flow distributor (22) and the actuator, and the ends of the high-pressure water follower connecting rod (23) and the active connecting rod (25) are articulated with each other; at the same time, a high-pressure water channel is provided in the high-pressure water follower connecting rod (23), and a jet nozzle (27) is provided at the end thereof and is connected to the high-pressure water channel; A roller (26) is also provided on the upper end of the high-pressure water follower connecting rod (23); The actuator is provided with an actuator column (216) having a cylindrical cavity inside, an actuator guide rail (215) being provided on the side wall along the axial direction, a built-in hydraulic cylinder (24) being provided therein, an active connecting rod (25) being hinged to the built-in hydraulic cylinder (24), a guide (214) being provided at the end of the built-in hydraulic cylinder (24), and the guide (214) sliding along the actuator guide rail (215) under the drive of the built-in hydraulic cylinder (24); The slag discharge unit (212) is arranged in a slag discharge unit housing (213), and the actuator column (216) is axially connected to the slag discharge unit housing (213); The slag discharge unit (212) comprises a hydraulic device (2121) and a spiral slag discharge short section (2122) arranged along the axial direction, and an axial connecting sleeve (2123) is arranged outside the spiral slag discharge short section (2122); The hinged distributor (22) is a cylindrical component, with a cylindrical cavity in the middle, a second annular porous channel (22-4) at one end connected to the cavity, a plurality of first porous channels (22-1) buried in the wall at the other end, and a high-pressure water annular groove (22-2) buried at the end of the plurality of first porous channels (22-1), a hinge hole (22-3) embedded in the wall for hingedly connecting the high-pressure water follower connecting rod (23); a built-in channel (22-5) is also embedded in the wall ), used to communicate with the built-in hydraulic cylinder (24); the high-pressure water follower connecting rod (23) is connected to the hinge hole (22-3), the high-pressure water annular groove (22-2) is connected with the built-in channel (2-5) and the hinge hole (22-3) in sequence, and the high-pressure water enters the high-pressure water channel in the high-pressure water follower connecting rod (23) along the above-mentioned built-in channel; the second porous channel (22-4) is connected to the actuator column (216), and the first porous channel (22-1) is connected to the third porous channel joint (21).

2. The horizontal hole vertical hydraulic grooving system according to claim 1, characterized in that: One end of the double-layer drill rod (1) is axially connected to a first porous channel joint (11), and the other end is axially connected to a second porous channel joint (15); adjacent double-layer drill rods (1) are axially connected to form a sealed connection body through the first porous channel joint (11) and the second porous channel joint (15); the main body of the double-layer drill rod (1) is a rod body, the outside of the rod body is a double-layer drill rod outer wall (12), and the inside of the rod body is a double-layer drill rod inner wall (13), forming a slag discharge cavity.

3. The horizontal hole vertical hydraulic grooving system according to claim 1 or 2, characterized in that: The first porous channel joint (11) has uniformly distributed first high-pressure water channels (111) that pass high-pressure water and are connected to the outer wall (12) of the double-layer drill pipe via a first connecting thread (112); a first slag discharge channel (113) provided at the center axis position is communicated with the rod cavity of the double-layer drill pipe (1) and is sealed with the inner wall (13) of the double-layer drill pipe.

4. The horizontal hole vertical hydraulic grooving system according to claim 1 or 2, characterized in that: The second porous channel joint (15) has a third high-pressure water channel (151) evenly distributed thereon, which also passes high-pressure water and is connected to the outer wall (12) of the double-layer drill pipe through a third connecting thread (152). The second slag discharge channel (153) provided at the center axis position is in communication with the inner wall (13) of the double-layer drill pipe.

5. A method for constructing a water-cutting curtain with vertical cutting and filling of horizontal holes on the ground, characterized in that: The method is realized by using the horizontal hole vertical hydraulic grooving system according to any one of claims 1 to 4, specifically comprising: Based on a horizontal hole vertical slotting system composed of an in-hole slotting assembly (2) and a double-layer drill rod (1), a vertical slot section is cut along the horizontal hole direction and then filled and grouted to construct a water cutoff curtain, which specifically includes the following steps: Step 1: Based on geological conditions, hydrogeological conditions, rock formation characteristics and mechanical properties, select the lateral curtain type, formulate a curtain construction plan, divide the curtain slot sections and construction sequence, and determine the ground directional drilling hole opening location and branch hole layer position; Step 2: Use a surface drilling rig to construct a directional horizontal borehole. First, construct the vertical hole section, then the inclined hole section. Then, according to the slot section construction sequence and branch hole layer position, construct the horizontal hole section to the designed position. Step 3: Use the horizontal hole vertical hydraulic grooving system to perform the first sequence slot construction, bring out the drilling device, then install the horizontal hole vertical hydraulic grooving system and lower it to the end of the constructed horizontal hole section, perform the first backward high-pressure water jet grooving, then advance the horizontal hole vertical hydraulic grooving system again to the end of the horizontal hole section, then perform the second backward high-pressure water jet grooving, completing the grooving construction of the first sequence slot section, and then bring out the dedicated grooving system; Step 4: Use the grouting system to fill and grout the first sequence trench section; Step 5: Use the horizontal hole vertical hydraulic grooving system to perform grooving construction of the second sequence grooving section; repeat the method of step 3 to complete the grooving construction of the second sequence grooving section; Step 6: Use the grouting system to fill and grout the second sequence trench section; Step 7: Repeat steps 3 to 6 to complete the construction of all first-order and second-order slot sections of a set of ground directional drilling holes to form a complete curtain wall; Step 8: Repeat steps 2 to 7 to construct subsequent ground directional drilling holes and groove filling and grouting until all curtain walls of the curtain construction plan are completed and a complete curtain is constructed.

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