Grouting repair method, device, electronic equipment, storage medium and program product

Abstract

The present disclosure relates to the technical field of mine engineering and railway engineering intersection, and particularly relates to a grouting repair method and device, electronic equipment, storage medium and program product. The goaf grouting repair method comprises the following steps: step one: determining the range of the goaf corresponding to the target railway section; step two: respectively performing vertical hole coring drilling at the positions intersecting with the roadway direction of the goaf on the center line of the target railway section and the left and right sides of the first preset distance from the center line, and determining the drilling results. If the drilling results all show that the goaf is drilled, three target repair holes of the left target repair hole, the right target repair hole and the center target repair hole are determined. The present disclosure can accurately correspond to the goafs with different buried depths and different sections through the layered grouting mode, realize the point reinforcement and uniform filling, and ensure the comprehensiveness and pertinence of the repair effect.

Description

Technical Field

[0001] This disclosure relates to the technical field of interdisciplinary mining and railway engineering, and in particular to a grouting repair method, apparatus, electronic equipment, storage medium, and program product. Background Technology

[0002] With the long-term development of my country's mining industry, a large number of historical mining subsidence areas are highly concealed and buried at varying depths, which can easily induce ground subsidence, settlement, crack expansion, and changes in groundwater flow, thereby threatening the traffic safety along heavy-haul railway lines. The existing treatment of mining subsidence areas along railway lines usually takes large-volume grouting (underground filling and reinforcement) as the core mainstream technology, while surface covering is mostly used as an auxiliary or supplementary measure in specific scenarios.

[0003] However, existing technologies for treating goaf areas along railway lines are limited by the stringent requirements of railway operation regarding construction time, vibration, and settlement control, as well as the complex topography, geological conditions, stratum porosity connectivity, and varied cavity morphologies. Traditional single-method repair methods (such as large-volume grouting or surface covering) often fail to achieve uniform filling of the cavities, restoration of mechanical properties, and long-term stability. Furthermore, existing technologies still have shortcomings in terms of detection accuracy, grout permeability control, and minimizing the impact of construction on operations: detection methods struggle to obtain high-resolution three-dimensional cavity information in a short time; grouting materials and processes are difficult to adapt to the filling requirements of complex cavity networks; leading to unstable treatment effects and the risk of secondary settlement. Therefore, for goaf areas along heavy-haul railways, there is an urgent need for a comprehensive repair process that integrates high-precision detection, controllable grouting filling, and zoned mechanical reinforcement to achieve efficient, environmentally friendly, and sustainable goaf treatment while ensuring railway operation safety. Summary of the Invention

[0004] In view of the above-mentioned technical problems, this disclosure provides a grouting repair method, apparatus, electronic device, storage medium and program product.

[0005] Firstly, this disclosure provides a method for grouting repair of goaf areas, including: Step 1: Determine the extent of the goaf area corresponding to the target railway section; Step 2: At the centerline of the target railway section and at the positions on the left and right sides at the first preset distance from the centerline, and at the positions where they intersect with the roadway direction of the goaf, vertical core drilling is carried out to determine the drilling results. If the drilling results all show that the goaf has been encountered, three target repair holes are determined: the left target repair hole, the right target repair hole, and the center target repair hole. Step 3: Determine whether there is any collapse in the goaf corresponding to the three target repair holes; Step 4: If no collapse occurs in the goaf corresponding to the three target repair holes, construct directional horizontal wells at the top of the goaf from the left and right target repair holes, respectively, along the direction of the goaf roof extending away from the target railway section, to obtain the left directional horizontal well corresponding to the left target repair hole and the right directional horizontal well corresponding to the right target repair hole. Step 5: Perform controlled fracturing and first grouting operations at the left and right directional horizontal shafts respectively to form the left and right isolation colloid walls of the goaf roadway, and seal the left and right directional horizontal shafts; Step 6: From the left target repair hole and the right target repair hole respectively, open horizontal holes set up vertically along the top plate of the goaf towards the target railway section, to obtain the first upper horizontal hole and the second lower horizontal hole corresponding to the left target repair hole, and the third upper horizontal hole and the fourth lower horizontal hole corresponding to the right target repair hole. Step 7: Perform the second grouting operation on the first upper horizontal hole and the third upper horizontal hole respectively, and perform the first grouting operation on the second lower horizontal hole and the fourth lower horizontal hole respectively, so as to form a honeycomb support structure in the roadway of the goaf; Step 8: After the grouting operations at the left and right target repair holes have achieved the desired construction effect, the first grouting operation is carried out at the central target repair hole to complete the repair of the goaf.

[0006] Furthermore, according to the method of the first aspect of this disclosure, the goaf area corresponding to the target railway section is determined, including: Geophysical methods were used to probe the target railway section and identify areas of anomaly. Based on the detection of abnormal areas, the extent of the goaf is determined.

[0007] Furthermore, according to the method of the first aspect of this disclosure, the first preset distance is 5-10 meters.

[0008] Furthermore, according to the method of the first aspect of this disclosure, the method also includes: If at least one of the left target repair holes or the right target repair hole has a corresponding goaf collapse, then the controlled fracturing operation in steps four and five is skipped on the collapsed side, and steps four and five are executed on the non-collapsed side, and then step six is ​​executed uniformly.

[0009] Furthermore, according to the method of the first aspect of this disclosure, if all three target repair holes correspond to goaf areas with collapse, or after performing step seven, the following operations are performed: On both sides of the roadway perpendicular to the goaf, and within a predetermined range from the edge of the goaf, multi-level target horizontal wells are opened from the bottom of the roadway down to the first layer of rock on the ground. Each target horizontal well has multiple branches and penetrates the goaf, extending into the surrounding rock strata. The first grouting operation is carried out in each of the multi-level target horizontal wells. The target horizontal wells on both sides of the roadway in the goaf are staggered.

[0010] Furthermore, according to the method of the first aspect of this disclosure, the first grouting operation refers to injecting a polymer grout, and the second grouting operation refers to injecting a mixed grout of coal gangue powder, cement and oxidant.

[0011] Secondly, this disclosure provides a grouting repair device for goaf areas, comprising: The first determining module is configured to determine the extent of the goaf area corresponding to the target railway section; The second determining module is configured to perform vertical core drilling at the centerline of the target railway section and at the left and right sides at a first preset distance from the centerline, and at the intersection with the roadway direction of the goaf, to determine the drilling results. If the drilling results all show that the goaf has been encountered, three target repair holes are determined: the left target repair hole, the right target repair hole, and the center target repair hole. The third determination module is configured to determine whether there is a collapse in the goaf area corresponding to the three target repair holes; The horizontal well construction module is configured to construct directional horizontal wells at the top of the goaf from the left and right target repair holes, respectively, in the direction of the goaf roof extension away from the target railway section, without any collapse in the goaf corresponding to the three target repair holes, so as to obtain a left directional horizontal well corresponding to the left target repair hole and a right directional horizontal well corresponding to the right target repair hole. The isolation adhesive wall module is configured to perform controlled fracturing and first grouting operations at the left and right directional horizontal shafts, respectively, to form the left and right isolation adhesive walls of the goaf roadway and to seal the left and right directional horizontal shafts. The horizontal hole module is configured to open horizontal holes set vertically from the left target repair hole and the right target repair hole, respectively, along the top plate of the goaf towards the target railway section, to obtain the first upper horizontal hole and the second lower horizontal hole corresponding to the left target repair hole, and the third upper horizontal hole and the fourth lower horizontal hole corresponding to the right target repair hole. The honeycomb support structure module is configured to perform a second grouting operation on the first upper horizontal hole and the third upper horizontal hole respectively, and to perform a first grouting operation on the second lower horizontal hole and the fourth lower horizontal hole respectively, so as to form a honeycomb support structure in the roadway of the goaf. The repair module is configured to perform the first grouting operation in the central target repair hole after the grouting operations at the left and right target repair holes have achieved the target construction effect, thereby completing the repair of the goaf.

[0012] Thirdly, this disclosure provides an electronic device, including: a memory for storing computer-readable instructions; and a processor for executing the computer-readable instructions, causing the electronic device to perform the method as described in any embodiment of the first aspect.

[0013] Fourthly, this disclosure provides a non-transitory computer-readable storage medium for storing computer-readable instructions that, when executed by a processor, cause the processor to perform the method as described in any embodiment of the first aspect.

[0014] Fifthly, this disclosure provides a computer program product, including a computer program that, when executed by a processor, implements the method as described in any embodiment of the first aspect.

[0015] This disclosure provides a grouting repair method, apparatus, electronic equipment, storage medium, and program product. By determining the scope and collapse state of the goaf corresponding to the target railway section, this disclosure employs a layered and zoned construction process, combining directional horizontal well construction, controlled fracturing grouting to form a roadway isolation colloidal wall, and layered horizontal hole grouting to construct a honeycomb support structure, supplemented by central hole grouting. This effectively solves the problems of uneven cavity filling and insufficient mechanical property recovery in traditional single repair methods, improves the detection accuracy and grouting permeability control capability of goaf treatment, achieves long-term stability of the goaf filling body, reduces the risk of secondary settlement, and minimizes the interference of construction on railway operation, thus meeting the needs of efficient, environmentally friendly, and sustainable goaf treatment along heavy-haul railway lines.

[0016] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0017] The above and other objects, features, and advantages of this disclosure will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0018] Figure 1 A schematic flowchart of a grouting repair method for goaf areas provided in this embodiment of the present disclosure; Figure 2A schematic flowchart of another goaf grouting repair method provided in this embodiment of the present disclosure; Figure 3 A schematic diagram of vertical hole wireline coring drilling provided in an embodiment of this disclosure; Figure 4 A diagram showing the arrangement of the target repair holes provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of a roadway for sealing a collapsed goaf provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of grouting and filling repair provided in an embodiment of this disclosure; Figure 7 A schematic diagram of layered grouting construction in a goaf roadway provided in an embodiment of this disclosure; Figure 8 A schematic diagram showing the grouting location of a horizontal well for layered construction of a goaf roadway, provided in an embodiment of this disclosure; Figure 9 A structural block diagram of a goaf grouting repair device provided in this embodiment of the present disclosure; Figure 10 A hardware block diagram of an electronic device provided in an embodiment of this disclosure; Figure 11 This is a schematic diagram of a computer-readable storage medium provided in an embodiment of this disclosure. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this disclosure more apparent, exemplary embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this disclosure, and not all embodiments of this disclosure. It should be understood that this disclosure is not limited to the exemplary embodiments described herein.

[0020] This disclosure provides a grouting repair method for goaf areas. Please refer to... Figure 1 , Figure 1 This is a schematic flowchart illustrating a method for grouting repair of goaf areas provided in an embodiment of this disclosure. Figure 1 As shown, the method includes: Step 101: Determine the extent of the goaf area corresponding to the target railway section.

[0021] In one embodiment of this disclosure, determining the extent of the goaf area corresponding to the target railway section includes: Geophysical methods were used to probe the target railway section and identify areas of anomaly. Based on the detection of abnormal areas, the extent of the goaf is determined.

[0022] Specifically, the target railway section refers to an existing section of a mining railway line that is planned by the railway department but is undergoing subsidence or deformation. Geophysical exploration methods include, but are not limited to, seismic methods, transient electromagnetic methods, and high-density electrical resistivity tomography (EDT), and one or more combinations thereof can be used to probe the target railway section. On the target railway section, existing geophysical exploration methods are used to determine if any abnormal areas exist. If abnormal areas are found, a preliminary risk zone is delineated for these areas. Based on these abnormal areas, the extent of the goaf beneath the target railway section is determined, and then the angle between the goaf's roadway orientation and the target railway section is determined based on the goaf's extent.

[0023] For example, on the target railway section, existing geophysical exploration methods are used to detect whether there are any abnormal areas underground. If abnormal areas are found, a risk range including suspected goaf areas and surrounding potential impact zones is initially delineated. Then, by excluding non-goaf anomalies such as water bodies, faults, and weathered fracture zones, the scope of the goaf area under the target railway section is defined from the abnormal areas. Based on the boundary morphology and distribution characteristics of the goaf area, the orientation of the original roadways in the goaf area is determined, and the angle between the orientation and the centerline of the target railway section is calculated. This angle can be used to provide a basis for subsequent drilling layout and grouting repair scheme design.

[0024] Step 102: At the centerline of the target railway section and at the positions on the left and right sides at a first preset distance from the centerline, and at the positions where they intersect with the roadway direction of the goaf, vertical core drilling is carried out to determine the drilling results. If the drilling results all show that the goaf has been encountered, three target repair holes are determined: the left target repair hole, the right target repair hole, and the center target repair hole.

[0025] In one embodiment of this disclosure, the first preset distance refers to extending 5-10 meters, preferably 8 meters, to the left and right sides of the target railway segment, based on the centerline of the target railway segment. Specifically, at the positions on the left and right sides of the centerline of the target railway segment and at the locations intersecting with the roadway direction of the goaf, drilling tools are used to perform core drilling using vertical hole core drilling. During the drilling process, clean water or mud is used as the cleaning fluid. If the clean water or mud significantly decreases, it indicates that the drilling result has reached the goaf. If the drilling results all show that the goaf has been reached, it indicates that the goaf range determined by geophysical exploration is correct. Then, at the positions on the left and right sides of the centerline of the target railway segment and at the locations intersecting with the roadway direction of the goaf, three target repair holes—the left target repair hole, the right target repair hole, and the central target repair hole—are determined. The central target repair hole is located at the intersection of the centerline of the target railway section and the roadway direction of the goaf. The left and right target repair holes are respectively set on the left and right sides of the target railway section, that is, at the intersection of the centerline of the target railway section and the roadway direction of the goaf.

[0026] Step 103: Determine whether there is any collapse in the goaf corresponding to the three target repair holes.

[0027] In one embodiment of this disclosure, in step 102, after drilling into the goaf, the drilling tools are raised at the three target repair holes, and then the "downhole TV" with a camera is lowered down to confirm whether there are any collapses, cavities or other problems below through real-time images, that is, to determine whether there is a collapse in the goaf corresponding to the three target repair holes.

[0028] Step 104: If no collapse occurs in the goaf corresponding to the three target repair holes, construct directional horizontal wells at the top of the goaf from the left and right target repair holes, respectively, along the direction of the goaf roof extending away from the target railway section, to obtain the left directional horizontal well corresponding to the left target repair hole and the right directional horizontal well corresponding to the right target repair hole.

[0029] In one embodiment of this disclosure, if no collapse occurs in the goaf corresponding to the three target repair holes, a horizontal well is constructed along the roof extension direction of the goaf towards the side away from the target railway section, starting from the bottom of the left and right target repair holes. The horizontal well is set at the roof of the goaf, forming a left directional horizontal well connected to the left target repair hole and a right directional horizontal well connected to the right target repair hole.

[0030] Step 105: Perform controlled fracturing and first grouting operations at the left and right directional horizontal shafts respectively to form the left and right isolation colloid walls of the goaf roadway, and seal the left and right directional horizontal shafts.

[0031] In one embodiment of this disclosure, controlled fracturing refers to the use of external forces, including but not limited to horizontal fracturing with a high-pressure pump or gas fracturing technology. The first grouting operation refers to the injection of polymer slurry. Specifically, horizontal fracturing or gas fracturing technology is performed at the left and right directional horizontal wells, respectively, causing the rock on the roof side of the goaf at the left and right directional horizontal wells to collapse, forming a loose accumulation body, which is used to initially seal the left and right sides of the goaf roadway. Then, polymer slurry is injected through the left and right directional horizontal wells, allowing the polymer slurry to flow into the gaps of the loose accumulation body formed after the collapse of the goaf roof. After the polymer slurry solidifies, the loose gravel is firmly cemented, forming a left isolation colloid wall and a right isolation colloid wall on the left and right sides of the goaf roadway, respectively, for sealing the goaf roadway. After the roadway sealing is completed, the left and right directional horizontal wells are then sealed.

[0032] In one embodiment of this disclosure, if there is water accumulation in the goaf, the water between the left and right isolation colloid walls is pumped out after the left and right isolation colloid walls of the roadway forming the goaf, and then subsequent grouting operations are carried out.

[0033] In another embodiment of this disclosure, the left directional horizontal well and the right directional horizontal well are drilled horizontally for 5m along the extension direction of the top plate. The partial collapse of the top plate is achieved by short-distance directional drilling, which avoids the safety risks caused by excessive damage to the top plate. At the same time, it provides a controllable range and volume for the subsequent grouting operation to construct the isolation colloid wall.

[0034] Step 106: From the left target repair hole and the right target repair hole, respectively, open horizontal holes set vertically along the roof of the goaf towards the target railway section, to obtain the first upper horizontal hole and the second lower horizontal hole corresponding to the left target repair hole, and the third upper horizontal hole and the fourth lower horizontal hole corresponding to the right target repair hole.

[0035] In one embodiment of this disclosure, horizontal holes are constructed downward from the left target repair hole and the right target repair hole, respectively, in the top plate of the goaf, towards the direction close to the target railway section, to obtain a first upper horizontal hole and a second lower horizontal hole connected to the left target repair hole, and a third upper horizontal hole and a fourth lower horizontal hole connected to the right target repair hole.

[0036] Step 107: Perform the second grouting operation on the first upper horizontal hole and the third upper horizontal hole respectively, and perform the first grouting operation on the second lower horizontal hole and the fourth lower horizontal hole respectively, so as to form a honeycomb support structure in the roadway of the goaf.

[0037] In one embodiment of this disclosure, the second grouting operation refers to injecting a mixed grout of coal gangue powder, cement, and oxidant. Specifically, the mixed grout of coal gangue powder, cement, and oxidant is injected into the first upper horizontal hole and the third upper horizontal hole through the left and right target repair holes, respectively. Simultaneously, polymer grout is injected into the second lower horizontal hole and the fourth lower horizontal hole through the left and right target repair holes, respectively. The "oxidant" in the upper mixed grout diffuses with the mixed grout and encounters the injected "polymer grout" inside the goaf. The oxidant triggers a rapid cross-linking reaction in the polymer, causing the originally highly fluid polymer grout to solidify in a short time and form a "honeycomb support structure" to fill the goaf. The cost of the polymer grout is much higher than that of the "coal gangue powder + cement + oxidant" mixed grout (usually several times or even more than ten times). This solution uses a low-cost mixed slurry and polymer slurry to form a "honeycomb support structure," which fills the goaf while saving on the cost of polymer materials, thus ensuring reinforcement.

[0038] Step 108: After the grouting operations at the left and right target repair holes have achieved the target construction effect, the first grouting operation is carried out at the central target repair hole to complete the repair of the goaf.

[0039] In one embodiment of this disclosure, the target construction effect refers to the full reaction of the upper coal gangue powder, cement, and oxidant mixture with the lower polymer slurry to form a dense and tightly bonded honeycomb support structure that fills the goaf. Its strength matches that of the roof rock, meeting the standards required for stable operation of the target railway section. After achieving the target construction effect through grouting operations at the left and right target repair holes, polymer slurry can be injected into the central target repair hole to further fill the goaf. Combined with the grouting operations at the left and right target repair holes, the filling of the goaf is completed, thus achieving the repair of the goaf.

[0040] In summary, based on the technical solutions provided in the embodiments of this disclosure, this disclosure, by determining the scope and collapse state of the goaf corresponding to the target railway section, adopts a layered and zoned construction process that combines directional horizontal well construction, controlled fracturing grouting to form a roadway isolation colloidal wall, and layered horizontal hole grouting to construct a honeycomb support structure, supplemented by central hole grouting. This effectively solves the problems of uneven filling of voids and insufficient recovery of mechanical properties that exist in traditional single repair methods, improves the detection accuracy and grouting permeability control capability of goaf treatment, realizes the long-term stability of the goaf filling body, reduces the risk of secondary settlement, and minimizes the interference of construction on railway operation, thus meeting the needs of efficient, environmentally friendly and sustainable treatment of goaf areas along heavy-haul railways.

[0041] The formulations of the aforementioned coal gangue powder, cement, and oxidant mixed slurry, as well as the polymer slurry, are mature and widely used processes in the prior art, and are not limited herein. For example, during the construction of the target repair hole, the density, hardness, and other information of the roof rock in the goaf can be determined by testing core samples. Based on this information, the formulations of the coal gangue powder, cement, and oxidant mixed slurry, as well as the polymer slurry, can be determined to suit different geological conditions and reinforcement needs of the goaf.

[0042] Furthermore, grouting repair methods for goaf areas also include: If at least one of the left target repair holes or the right target repair hole has a corresponding goaf collapse, then the controlled fracturing operation in steps 104 and 105 is skipped on the collapsed side, and steps 104 and 5 are executed on the non-collapsed side, and then step 106 is executed uniformly.

[0043] Specifically, if the "underground television" detects a collapse in the goaf corresponding to at least one of the left and right target repair holes, performing the directional horizontal well construction in step 104 and the controlled fracturing operation in step 105 on the collapsed side will not only fail to form an effective isolation colloid wall, but may also exacerbate the expansion of the collapse range due to fracturing disturbance, while causing a large loss of grouting material, resulting in "ineffective grouting." Skipping this step can avoid blindly disturbing the collapsed area, reducing construction risks and cost waste. For the goaf roadway structure on the non-collapsed side, controlled fracturing and grouting through directional horizontal wells can effectively form left / right isolation colloid walls. Its core function is to construct grouting constraint boundaries, preventing material leakage to the outside during subsequent layered horizontal hole grouting, and ensuring stable grouting pressure and filling effect. After the isolation wall is constructed on the non-collapsed side, step six, the opening of horizontal holes in the upper and lower layers, and step seven, the grouting of the honeycomb support structure are carried out uniformly on the left and right target repair holes to ensure that the goaf on both the collapsed and non-collapsed sides can be effectively filled and reinforced by the grouting material.

[0044] In summary, based on the technical solutions provided in the embodiments of this disclosure, this disclosure addresses the complex working conditions of localized collapses in goaf areas by skipping controllable fracturing operations on the collapsed side and uniformly performing subsequent layered horizontal hole grouting after normally constructing an isolation colloid wall on the non-collapsed side. This avoids ineffective construction in the collapsed area, reduces construction costs and time consumption, and simultaneously ensures the constraint effect of grouting in non-collapsed areas, preventing grout material loss. It ensures that even under complex geological conditions of localized collapses, a stable support structure can still be efficiently constructed, improving the adaptability of the overall repair scheme to complex geological conditions of goaf areas. This achieves the stability of goaf treatment effects under different working conditions and minimizes the interference of construction on heavy-haul railway operations.

[0045] Furthermore, grouting repair methods for goaf areas also include: If all three target repair holes correspond to goaf areas with collapse, or if the collapse occurs after step 107, perform the following operations: On both sides of the roadway perpendicular to the goaf, and within a predetermined range from the edge of the goaf, multi-level target horizontal wells are opened from the bottom of the roadway down to the first layer of rock on the ground. Each target horizontal well has multiple branches and penetrates the goaf, extending into the surrounding rock strata. The first grouting operation is carried out in each of the multi-level target horizontal wells. The target horizontal wells on both sides of the roadway in the goaf are staggered.

[0046] Specifically, downhole television revealed collapse in the goaf areas corresponding to the three target repair holes. Alternatively, after step 107 of the goaf grouting repair method described above, the following operations were performed to further reinforce the goaf repair: The aforementioned preset range refers to 3-5m. For example, on both sides of the roadway perpendicular to the goaf, and within a range of 3-5m from the edge of the goaf, preferably using 5m as a reference, repair holes are constructed by core drilling using vertical shaft ropes. At the repair holes, multi-level target horizontal wells are drilled from the bottom of the goaf roadway down to the first layer of rock below the ground. Each level of target horizontal well has multiple branches, all located on the same horizontal plane and parallel to the ground. The other end of each target horizontal well penetrates the goaf and extends into the surrounding rock strata. Polymer grout is injected into each of the multi-level target horizontal wells. After the grout solidifies, a load-bearing cemented body can be formed at the bottom of the target railway section. The horizontal wells on both sides of the goaf roadway are staggered, preferably with a vertical stagger of 1.5m. Preferably, the extension into the surrounding rock strata of the goaf is 3-5m.

[0047] In practical applications, after the construction of the target horizontal well, polymer slurry is injected. After the polymer slurry solidifies, the next level of target horizontal well is constructed.

[0048] In summary, based on the technical solutions provided in the embodiments of this disclosure, this disclosure addresses the extreme working conditions of total collapse in goaf areas or the reinforcement needs after conventional repairs. It involves establishing multi-level, staggered, multi-branch horizontal wells on both sides of the vertical roadway, within a range of 3-5 meters from the edge of the goaf, extending from the bottom of the roadway to the first layer of rock below the ground. High-polymer grout is injected level by level, and the next level is constructed only after the grout has solidified. This forms a load-bearing structure tightly bonded to the surrounding rock strata at the bottom of the railway section. This effectively solves the problem of traditional grouting failing to create stable support under conditions of total collapse. Simultaneously, it can serve as a reinforcement measure to further enhance the mechanical properties of the goaf and surrounding rock strata, reduce the risk of secondary settlement, and significantly improve the all-condition adaptability and long-term stability of goaf treatment along heavy-haul railway lines.

[0049] The existing goaf repair technology has the following problems: (1) Insufficient detection accuracy and incomplete three-dimensional cavity information. Reason: Traditional geophysical surveys, shallow drilling, or historical archives often have limited resolution, especially for ancient or illegally mined voids with large variations in burial depth and complex geometric shapes, making it difficult to accurately invert their three-dimensional volume and connectivity network. Impact: This leads to repair designs based on incomplete information, posing a risk of "blind zone construction" or over-repair, resulting in low remediation efficiency and uncontrollable costs.

[0050] (2) Lack of a comprehensive construction strategy for the treatment of cavities in goaf areas. The drilling and exploration range is limited, making it impossible to obtain information on the internal structure of the cavities or to directly reach the target location with the grouting pipe, thus affecting the filling effect. In addition, traditional grouting control methods are difficult to achieve zoned and layered, and controllable seepage. Grout accumulation, incomplete filling of layers, or loss to non-target areas occur, resulting in uneven reinforcement, secondary settlement, and material waste.

[0051] (3) Construction has a significant impact on railway operations and poses high safety risks. Reasons: Large-volume grouting, blasting, or large-scale surface operations may cause vibration and settlement, and the construction period conflicts with railway operations, lacking low-interference construction techniques and refined timing control. Impact: It poses a real threat to the safety of heavy-haul railway operations and train schedules, and increases supervision and emergency costs.

[0052] Based on the above issues, and in order to describe in detail the grouting repair method provided in this disclosure, please refer to the appendix. Figure 2 - Appendix Figure 8 .

[0053] Figure 2 A schematic flowchart of another goaf grouting repair method provided in this embodiment of the present disclosure; Figure 3 A schematic diagram of vertical hole wireline coring drilling provided in an embodiment of this disclosure; Figure 4A diagram showing the arrangement of the target repair holes provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of a roadway for sealing a collapsed goaf provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of grouting and filling repair provided in an embodiment of this disclosure; Figure 7 A schematic diagram of layered grouting construction in a goaf roadway provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of the grouting location of a horizontal well for layered construction of a goaf roadway, provided in an embodiment of this disclosure.

[0054] like Figure 2 As shown, the grouting repair method for goaf areas specifically includes the following steps: Step 201: Use geophysical methods to delineate the approximate extent of the mining subsidence area along the planned railway line.

[0055] Specifically, based on the railway department's planned railway construction targets for mining areas or the locations where subsidence or deformation phenomena exist under completed mining railway lines, existing geophysical exploration methods (seismic method, transient electromagnetic method, high-density electrical method) are used to detect whether there are any abnormal areas, and the approximate range of the goaf is preliminarily delineated.

[0056] Step 202: At the intersection of the railway line center and the outer edge centerline at a vertical distance of about 8m with the roadway centerline, a vertical hole was drilled to obtain a goaf and verify the geophysical exploration results.

[0057] Specifically, refer to Figure 3 At the intersection of the railway line center and the roadway centerline of the goaf at a vertical distance of approximately 8 meters on both sides, vertical shaft wire coring was used to drill and cor the anomaly areas detected by geophysical exploration, and to verify the accuracy of the geophysical exploration results. When the geophysical exploration results all indicated that the goaf was encountered, three target repair holes were determined: the left target repair hole, the right target repair hole, and the central target repair hole.

[0058] In practical applications, core samples are taken from the roof of the goaf through three target repair holes to determine the density, hardness and other information of the rock. This lays the groundwork for adjusting the proportion of the grouting formula (the strength of the repair grouting material after solidification should be similar to the strength of the roof rock in order to achieve the best repair results).

[0059] For example, refer to Figure 3 and Figure 4 Based on geophysical exploration of anomaly areas, the angle between the roadway direction of the goaf and the heavy-haul railway line was initially determined. Vertical shaft wireline coring technology was then used to first locate the center of the heavy-haul railway line (i.e.,...) Figure 4Core drilling was conducted at borehole number 2, using mud as the flushing fluid. If a significant drop in mud level was observed in the mud pit during core drilling, it indicated that drilling had entered a goaf (where underground cavities exist or the strata in the third zone of the goaf have collapsed). Then refer to... Figure 3 and Figure 4 Using vertical hole wireline coring technology, vertical hole coring was performed at the intersection of the railway line and the centerline of the roadway at a vertical distance of 8m on both sides of the outer edge (i.e., Figure 4 If, during the core drilling process, the mud in the mud pit drops significantly (as seen in boreholes 1 and 3), it indicates that the drilling has entered a goaf area (where there are underground cavities or the strata in the third zone of the goaf have collapsed).

[0060] Step 203: Install underground television scanning equipment in three vertical holes and monitor the goaf area in real time.

[0061] Specifically, by inserting downhole television scanning into the three target repair holes—the left target repair hole, the right target repair hole, and the central target repair hole—real-time monitoring of the specific conditions of the goaf, including the collapse and subsequent grouting operations, can be achieved.

[0062] Step 204: Determine whether the goaf corresponding to the three vertical holes has collapsed.

[0063] Specifically, by lowering the three target repair holes—the left target repair hole, the right target repair hole, and the central target repair hole—into the well for television scanning of the goaf area, it can be determined whether there is a collapse in the goaf area under the three target repair holes. If there is no collapse, then step 205 is executed; if there is a collapse, then step 209 is executed.

[0064] Step 205: Construct horizontal wells using wired drilling measurement technology at a distance of approximately 8m from both sides of the vertical railway line.

[0065] Specifically, refer to Figure 2 , 4 And 5, if Figure 4 The top plates in holes 1, 2, and 3 (i.e., the aforementioned left target repair hole, right target repair hole, and center target repair hole) did not collapse. Therefore, at a distance of 8m on both sides of the vertical railway line (i.e., Figure 4 directional horizontal wells were constructed using wired drilling measurement technology from boreholes 1 and 3 in the middle.

[0066] Step 206: Drill the roof horizontally outward for about 5m, then perform hydraulic or gas fracturing to cause it to collapse and accumulate, which will be used to seal the tunnel.

[0067] Specifically, directional horizontal wells are constructed using wired measurement-while-drilling (MWD) technology, drilling horizontally for 5 meters at the top of the goaf, away from the railway line and along the extension direction of the goaf roof. This yields a left directional horizontal well corresponding to the left target repair hole and a right directional horizontal well corresponding to the right target repair hole. High-pressure pumps are then used for hydraulic fracturing or gas fracturing to cause rock collapse on the goaf roof sides of both the left and right directional horizontal wells, sealing the goaf roadways.

[0068] Step 207: High-pressure injection of polymer allows it to enter the gaps in the rock accumulation of the collapsed roof and solidify, forming a tunnel isolation wall.

[0069] Specifically, refer to Figure 5 High-pressure injection of polymer grout is performed through left- and right-directional horizontal wells, allowing the grout to enter the gaps in the collapsed roof rock and solidify, forming a tunnel isolation colloid wall. (If water is present in the goaf, it is extracted from the tunnel isolation colloid walls formed on both sides before grouting continues.) The solidification time of the injected polymer should be carefully controlled, and the required amount of polymer grout should be preliminarily estimated based on the spatial volume of the collapsed area to ensure the effective sealing of the tunnel isolation colloid wall. Figure 5 Only shown in Figure 4 A schematic diagram of the formation of a roadway isolation colloidal wall by fracturing grouting at borehole No. 3. Figure 4 The construction process for hole No. 1 is the same.

[0070] Step 208: In the vertical holes about 8m apart on both sides of the railway line, construct two horizontal wells with the upper and lower parts on the same vertical plane, and carry out high-pressure grouting. The upper part is injected with a mixture of coal gangue powder, cement and oxidant, and the lower part is injected with polymer grout until the grout fills the goaf and solidifies.

[0071] Specifically, refer to Figure 6After the roadway isolation wall is formed, the left and right directional horizontal shafts are sealed using the "bridging" technique. Then, the "branching" technique is used on the left and right target repair holes. That is, two horizontal holes located on the same vertical plane are opened inward (i.e., along the roof of the goaf towards the railway) in the 8m vertical holes on both sides of the railway line (i.e., the left and right target repair holes). High-pressure grouting is carried out on these holes. The upper part (i.e., the first and second lower horizontal holes corresponding to the left target repair hole, and the third and fourth lower horizontal holes corresponding to the right target repair hole) is injected with coal gangue powder + cement + oxidant mixed grout; the lower part (i.e., the second and fourth lower horizontal holes) is injected with polymer grout. The grout fills the goaf completely and the oxidant reacts with the polymer grout to solidify and form a honeycomb support structure. This can effectively reinforce the goaf while saving polymer filling materials. During the aforementioned construction process, the high-pressure grouting situation can be observed via downhole television at borehole position 2. Additionally, Figure 4 The grouting process in step 208 of the construction of the No. 1 vertical hole can also be observed by the underground television in the No. 2 hole. After the high-pressure grouting of the No. 1 and No. 3 holes achieves the required construction effect, the polymer grout is injected into the No. 2 hole. At this point, the voids in the goaf along the railway line are filled under the effect of high-pressure grouting.

[0072] The aforementioned required construction effect refers to the full reaction of the upper coal gangue powder, cement, and oxidant mixture slurry with the lower polymer slurry to form a dense and tightly bonded honeycomb support structure that fills the goaf, with its strength matching that of the roof rock, thus meeting the standard for stable operation of the target railway section.

[0073] Step 209: Construct multi-level, multi-branch horizontal wells from bottom to top at a position approximately 5m perpendicular to both sides of the goaf roadway. The horizontal wells on both sides are staggered by an interval of approximately 1.5m. After each level is completed, high-pressure injection of polymer slurry is carried out and allowed to solidify, so that the broken rock at the bottom of the railway line forms a load-bearing cemented body.

[0074] Specifically, if underground television cameras installed in three vertical boreholes reveal that the roof of the goaf has collapsed, or if the goaf has been filled using the steps described above, then refer to... Figure 7 and Figure 8At a distance of approximately 5 meters from the left and right sides of the goaf roadway, multi-level, multi-branch horizontal wells are constructed from bottom to top (the branches of the multi-branch horizontal wells are located on the same horizontal plane, parallel to the ground. In addition, the horizontal wells need to penetrate the grouting cavity and drill into the surrounding rock for 3-5 meters for further reinforcement). The horizontal wells on both sides are staggered 1.5 meters apart. After each level is completed, high-pressure injection of polymer grout is performed and allowed to solidify, so that the broken rock at the bottom of the railway line forms a cemented body that can withstand heavy loads. Thus, the goaf area is repaired by layered, controlled-permeability grouting.

[0075] This disclosure also provides a grouting repair device. Figure 9 A structural block diagram of a goaf grouting repair device provided in this disclosure embodiment is shown below. Figure 9 As shown, the goaf grouting repair device 900 includes: a first determining module 901, a second determining module 902, a third determining module 903, a horizontal well construction module 904, an isolation adhesive wall module 905, a horizontal hole module 906, a honeycomb support structure module 907, and a repair module 908.

[0076] In one exemplary embodiment, the first determining module 901 is configured to determine the range of the goaf area corresponding to the target railway section; In one exemplary embodiment, the second determining module 902 is configured to perform vertical core drilling at the centerline of the target railway section and at the left and right sides at a first preset distance from the centerline, and at the positions intersecting with the roadway direction of the goaf, to determine the drilling results. If the drilling results all show that the goaf has been encountered, three target repair holes are determined: the left target repair hole, the right target repair hole, and the center target repair hole. In one exemplary embodiment, the third determining module 903 is configured to determine whether there is a collapse in the goaf area corresponding to the three target repair holes; In one exemplary embodiment, the horizontal well construction module 904 is configured to construct directional horizontal wells at the top of the goaf from the left target repair hole and the right target repair hole, respectively, along the direction of the top plate of the goaf extending away from the target railway section, so as to obtain a left directional horizontal well corresponding to the left target repair hole and a right directional horizontal well corresponding to the right target repair hole, respectively, when no collapse has occurred in the goaf corresponding to the three target repair holes. In one exemplary embodiment, the isolation adhesive wall module 905 is configured to perform controllable fracturing and first grouting operations at the left directional horizontal shaft and the right directional horizontal shaft, respectively, to form the left isolation adhesive wall and the right isolation adhesive wall of the goaf roadway, and to seal the left directional horizontal shaft and the right directional horizontal shaft; In one exemplary embodiment, the horizontal hole module 906 is configured to open horizontal holes arranged vertically from the left target repair hole and the right target repair hole, respectively, along the direction from the top plate of the goaf towards the target railway section, to obtain a first upper horizontal hole and a second lower horizontal hole corresponding to the left target repair hole, and a third upper horizontal hole and a fourth lower horizontal hole corresponding to the right target repair hole. In one exemplary embodiment, the honeycomb support structure module 907 is configured to perform a second grouting operation on the first upper horizontal hole and the third upper horizontal hole, and a first grouting operation on the second lower horizontal hole and the fourth lower horizontal hole, so as to form a honeycomb support structure in the roadway of the goaf. In one exemplary embodiment, the repair module 908 is configured to perform a first grouting operation in the central target repair hole after the grouting operations at the left and right target repair holes have achieved the target construction effect, thereby completing the repair of the goaf.

[0077] Figure 10 This is a hardware block diagram of an electronic device provided according to an embodiment of the present disclosure. The electronic device 1000 according to an embodiment of the present disclosure includes at least a processor and a memory for storing computer-readable instructions. When the computer-readable instructions are loaded and executed by the processor, the processor performs the grouting repair method described in any of the preceding embodiments of the present disclosure.

[0078] Figure 10 The illustrated electronic device 1000 specifically includes a central processing unit (CPU) 1001, a graphics processing unit (GPU) 1002, and a memory 1003. These units are interconnected via a bus 1004. The CPU 1001 and / or GPU 1002 can function as the aforementioned processor, and the memory 1003 can function as the aforementioned memory storing computer-readable instructions. Furthermore, the electronic device 1000 may also include a communication unit 1005, a storage unit 1006, an output unit 1007, an input unit 1008, and an external device 1009, all of which are also connected to the bus 1004.

[0079] Figure 11 This is a schematic diagram of a computer-readable storage medium provided in an embodiment of this disclosure. (As shown...) Figure 11As shown, a computer-readable storage medium 1100 according to an embodiment of the present disclosure stores computer-readable instructions 1101 thereon. When the computer-readable instructions 1101 are executed by a processor, the grouting repair method described with reference to the above figures according to any embodiment of the present disclosure is performed. The computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory. Non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0080] This disclosure further provides a computer program product, including a computer program that, when executed by a processor, implements the grouting repair method described in any of the preceding embodiments of this disclosure.

[0081] The above is subject to the attached document. Figure 1 - Appendix Figure 11 This disclosure provides a grouting repair method, apparatus, electronic device, storage medium, and program product, and the technical solution of this disclosure has the following technical effects: 1. Layered grouting can accurately target goaf areas of different depths and sections, achieving targeted reinforcement and uniform filling, ensuring comprehensive and targeted repair results.

[0082] 2. Layered grouting can avoid the problems of accumulation, segregation or material sinking caused by one-time large-volume grouting, forming a uniform honeycomb structure with high density. The solidified body can effectively restore the bearing capacity of the railway foundation, reduce the risk of secondary settlement and track deformation, ensure the long-term operational safety of heavy-haul railways, and enhance the mechanical properties and long-term stability of the repair body.

[0083] 3. By using horizontal well hydraulic fracturing roadway sealing combined with zoned grouting, repair operations can be carried out at a distance underground, avoiding large-scale excavation or surface disturbance. Grouting pressure, flow rate and grout diffusion range can be monitored and adjusted in stages, making the construction process highly controllable and reducing the risk of unfilled cavities or grout loss.

[0084] 4. High material utilization and superior economic efficiency: Precise grouting in zoned and layered areas avoids grout flowing into non-target areas or accumulating in cavities, significantly improving material utilization. While ensuring repair quality, it reduces the total amount of grout injected, lowering material and labor costs and improving overall economic efficiency.

[0085] 5. The process disclosed herein, through a systematic treatment method of "horizontal well + zoned and layered grouting", achieves comprehensive advantages such as high detection accuracy, good repair effect, low construction risk, small operational interference, high material utilization rate, and strong adaptability, providing reliable technical support for ensuring the long-term stable operation of railway lines in mining areas.

[0086] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0087] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0088] The block diagrams of devices, apparatuses, devices, and systems disclosed herein are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0089] Additionally, as used herein, the "or" used in a list of items beginning with "at least one" indicates a separate list, such that a list of, for example, "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not imply that the described example is preferred or better than other examples.

[0090] It should also be noted that in the systems and methods of this disclosure, the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions to this disclosure.

[0091] Various changes, substitutions, and modifications can be made to the technology described herein without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of this disclosure is not limited to the specific aspects of the processes, machines, manufactures, events, means, methods, and actions described above. Currently existing or later-developed processes, machines, manufactures, events, means, methods, or actions that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein can be utilized. Therefore, the appended claims include such processes, machines, manufactures, events, means, methods, or actions within their scope.

[0092] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0093] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this disclosure to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A method for grouting repair of goaf areas, characterized in that, include: Step 1: Determine the extent of the goaf area corresponding to the target railway section; Step 2: Vertical core drilling is carried out at the centerline of the target railway section and at the left and right sides at a first preset distance from the centerline, and at the positions where the roadway direction of the goaf intersects with the roadway direction of the goaf. The drilling results are determined. If the drilling results all show that the goaf has been encountered, three target repair holes are determined: the left target repair hole, the right target repair hole, and the center target repair hole. Step 3: Determine whether there is any collapse in the goaf corresponding to the three target repair holes; Step 4: If no collapse has occurred in the goaf corresponding to the three target repair holes, directional horizontal wells are constructed at the top of the goaf from the left target repair hole and the right target repair hole, respectively, along the direction of the top plate of the goaf away from the target railway section, to obtain a left directional horizontal well corresponding to the left target repair hole and a right directional horizontal well corresponding to the right target repair hole. Step 5: Perform controlled fracturing and first grouting operations at the left and right directional horizontal shafts respectively to form the left and right isolation colloid walls of the roadway in the goaf, and seal the left and right directional horizontal shafts; Step 6: From the left target repair hole and the right target repair hole respectively, open horizontal holes arranged vertically along the top plate of the goaf towards the target railway section, to obtain the first upper horizontal hole and the second lower horizontal hole corresponding to the left target repair hole, and the third upper horizontal hole and the fourth lower horizontal hole corresponding to the right target repair hole; Step 7: Perform the second grouting operation on the first upper horizontal hole and the third upper horizontal hole respectively, and perform the first grouting operation on the second lower horizontal hole and the fourth lower horizontal hole respectively, so as to form a honeycomb support structure in the roadway of the goaf; Step 8: After the grouting operations at the left and right target repair holes have achieved the target construction effect, the first grouting operation is performed at the central target repair hole to complete the repair of the goaf.

2. The method for grouting repair of goaf areas according to claim 1, characterized in that, The determination of the goaf area corresponding to the target railway section includes: Geophysical methods were used to probe the target railway section and identify areas of anomaly. Based on the detected anomaly area, the extent of the goaf is determined.

3. The method for grouting repair of goaf areas according to claim 2, characterized in that, The first preset distance is 5-10 meters.

4. The method for grouting repair of goaf areas according to claim 1, characterized in that, The method further includes: If at least one of the left target repair holes or the right target repair hole has a corresponding goaf collapse, then the controlled fracturing operation in steps four and five is skipped on the collapsed side, and steps four and five are executed on the non-collapsed side, and then step six is ​​executed uniformly.

5. The grouting repair method for goaf areas according to claim 1, characterized in that, If the goaf areas corresponding to the three target repair holes all have collapsed, or if the operation is performed after step seven, the following operations are performed: On both sides of the roadway perpendicular to the goaf, and within a predetermined range from the edge of the goaf, multi-level target horizontal wells are constructed from the bottom of the roadway down to the first layer of rock on the ground. Each target horizontal well has multiple branches, and the target horizontal wells penetrate the goaf and extend into the surrounding rock strata. The first grouting operation is carried out in each of the multi-level target horizontal wells. The target horizontal wells on both sides of the roadway in the goaf are staggered.

6. The method for grouting repair of goaf areas according to claim 1, characterized in that, The first grouting operation refers to injecting polymer grout, and the second grouting operation refers to injecting a mixture of coal gangue powder, cement and oxidant grout.

7. A grouting repair device for goaf areas, characterized in that, include: The first determining module is configured to determine the extent of the goaf area corresponding to the target railway section; The second determining module is configured to perform vertical core drilling at the centerline of the target railway section and at the left and right sides at a first preset distance from the centerline, and at the positions where it intersects with the roadway direction of the goaf, to determine the drilling results. If the drilling results all show that the goaf has been encountered, three target repair holes are determined: the left target repair hole, the right target repair hole, and the center target repair hole. The third determining module is configured to determine whether there is a collapse in the goaf area corresponding to the three target repair holes; The horizontal well construction module is configured to construct directional horizontal wells at the top of the goaf from the left target repair hole and the right target repair hole, respectively, along the direction of the top plate of the goaf extending away from the target railway section, in the case that no collapse has occurred in the goaf corresponding to the three target repair holes, thereby obtaining a left directional horizontal well corresponding to the left target repair hole and a right directional horizontal well corresponding to the right target repair hole; The isolation adhesive wall module is configured to perform controlled fracturing and first grouting operations at the left and right directional horizontal shafts, respectively, to form the left and right isolation adhesive walls of the roadway in the goaf, and to seal the left and right directional horizontal shafts; The horizontal hole module is configured to open vertically arranged horizontal holes from the left target repair hole and the right target repair hole, respectively, along the direction from the top plate of the goaf towards the target railway section, to obtain a first upper horizontal hole and a second lower horizontal hole corresponding to the left target repair hole, and a third upper horizontal hole and a fourth lower horizontal hole corresponding to the right target repair hole. The honeycomb support structure module is configured to perform a second grouting operation on the first upper horizontal hole and the third upper horizontal hole respectively, and a first grouting operation on the second lower horizontal hole and the fourth lower horizontal hole respectively, so as to form a honeycomb support structure in the roadway of the goaf. The repair module is configured to perform a first grouting operation in the central target repair hole after the grouting operations at the left and right target repair holes have achieved the target construction effect, thereby completing the repair of the goaf.

8. An electronic device, characterized in that, include: Memory, used to store computer-readable instructions; as well as A processor for executing the computer-readable instructions, causing the electronic device to perform the goaf grouting repair method as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium for storing computer-readable instructions, characterized in that, When the computer-readable instructions are executed by a processor, the processor performs the goaf grouting repair method as described in any one of claims 1 to 6.

10. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the goaf grouting repair method as described in any one of claims 1 to 6.

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