Road goaf filling construction method and system

Abstract

The invention discloses a road goaf filling construction method and system.The method comprises the steps that at least one row of material injection holes are formed in the two sides, perpendicular to the roadbed extending direction, of a foundation, and each row of material injection holes comprise a plurality of material injection holes formed in the roadbed extending direction at intervals; solid filling materials are injected into the goaf through the material injection holes until the solid filling materials at the corresponding positions of the material injection holes reach the top area of the goaf; impact operation is carried out on the solid filling material, so that the solid filling material is diffused; the injection and impact operations of the solid filler are repeated in sequence until the goaf corresponding to the injection holes in the two sides of the roadbed is filled with the solid filler and a separation wall is formed, and the separation wall and the goaf corresponding to the roadbed form a closed area; a plurality of grouting holes are formed in the area, corresponding to the closed area, of the roadbed, and liquid filler is injected into the closed area through the grouting holes till the closed area is filled with the liquid filler. According to the method, the reinforcing effect of the goaf below the roadbed is guaranteed, filling materials are saved, and cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of road construction methods, and in particular relates to a road goaf area filling construction method and system. Background Art

[0002] When encountering unfilled underground goafs during roadbed construction, the traditional treatment methods include plugging and filling and grouting. Among them, the plugging and filling method is mainly suitable for projects with good surrounding rock above and around the goaf, which can be excavated and exposed at low cost. It cannot be implemented in cases where the goaf is buried deep, the goaf is covered with a soil layer with poor stability, the materials and machinery are difficult to put into the goaf, the personnel have difficulty in operation, or the safety risks are high. Therefore, its scope of application is limited. The grouting method has the disadvantages of large grouting workload, long construction period, high cost, and it is impossible to ensure that the grouting hole is at the top of the goaf cavity. If the grouting hole is not positioned accurately, it is easy to form an air mass at the highest point, which cannot be filled densely. Summary of the invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a road goaf filling construction method and system.

[0004] A first aspect of the present invention provides a road goaf filling construction method, comprising: At least one row of injection holes is respectively arranged on both sides of the foundation perpendicular to the extension direction of the roadbed, each row of injection holes includes a plurality of injection holes arranged at intervals along the extension direction of the roadbed, and each injection hole penetrates the surface area of ​​the foundation and is connected to the goaf; Injecting solid filling material into the goaf through each of the injection holes until the solid filling material at a position corresponding to each of the injection holes reaches the top area of ​​the goaf; Then, the solid filling material at the position corresponding to each injection hole is impacted, so that the solid filling material at the position corresponding to the injection hole is diffused toward the goaf corresponding to the position of the adjacent injection hole; Repeat the injection and impact operations of the solid filling material in sequence until the goafs corresponding to the injection holes on both sides of the roadbed are filled with the solid filling material and form isolation walls, and the isolation walls and the goafs corresponding to the roadbed form a closed area; A plurality of grouting holes are opened in the area corresponding to the enclosed area on the foundation, and liquid filling material is injected into the enclosed area through the grouting holes until the enclosed area is filled with the liquid filling material.

[0005] In addition, the road goaf filling construction method of the present invention may also have the following additional technical features: In some embodiments, the filling method further comprises: Determine the drilling area on the foundation according to the relative position relationship between the roadbed area and the goaf area in the foundation; The injection holes are arranged respectively at the edge positions on both sides of the perforated area perpendicular to the extension direction of the roadbed; the grouting holes are arranged in the area corresponding to the closed area in the perforated area, and the position distribution of the grouting holes in the perforated area is determined according to the depth information of the goaf.

[0006] In some embodiments, determining the drilling area on the foundation according to the relative position relationship between the roadbed area and the goaf in the foundation includes: Detecting the overlapping area between the roadbed area and the goaf area; If the overlapping area is located in the area where the roadbed is located, the area on the foundation corresponding to the overlapping area is used as the punching area; If the overlapping area is partially located within the area where the roadbed is located and partially located outside the area where the roadbed is located, the area on the foundation corresponding to the overlapping area and the area within a preset distance range outside the overlapping area is used as the drilling area, and the drilling area is located within the goaf.

[0007] In some embodiments, determining the position distribution of grouting holes in the drilling area according to the depth information of the goaf includes: The grouting holes are opened in the drilling area in an array distribution manner, and the distribution spacing of the grouting holes corresponding to the area with high depth in the goaf is set to a first distance, and the distribution spacing of the grouting holes corresponding to the area with low depth in the goaf is set to a second distance, and the first distance is smaller than the second distance.

[0008] In some embodiments, the grouting holes are opened in the perforated area in an array distribution manner, including: A plurality of rows of grouting holes are arranged in the punching area along the extension direction of the roadbed at intervals, each row of grouting holes includes a plurality of grouting holes distributed at intervals perpendicular to the extension direction of the roadbed, and the grouting holes in two adjacent rows of grouting holes are staggered.

[0009] In some embodiments, a vibration device is used to impact the solid filler at a position corresponding to each injection hole, and the diameter of at least some parts of the vibration device is smaller than the diameter of the injection hole.

[0010] In some embodiments, the vibration device includes a vibration rod and a driving unit, wherein the driving unit is fixedly connected to the vibration rod, and the driving unit is used to drive the vibration rod to reciprocate in the injection hole to perform an impact operation on the solid filler.

[0011] In some embodiments, one end of the vibration rod away from the driving part has a tapered tip.

[0012] In some embodiments, the method further comprises: A detection component is set in the area of ​​any two adjacent injection holes in the foundation, and the detection component is used to detect whether the goaf corresponding to the adjacent injection holes is filled with solid filling material. The detection component includes at least one of a photoelectric sensor, an ultrasonic sensor, a laser sensor or an infrared sensor.

[0013] In some embodiments, the method further comprises: Obtaining the water accumulation position in the goaf; If the water accumulation location is located within the closed area, the grouting hole is used to discharge the water corresponding to the water accumulation location; if the water accumulation location is located outside the closed area, a drainage hole is opened on the foundation outside the drilling area, and the drainage hole passes through the surface area of ​​the foundation and is connected with the goaf, and the drainage hole is used to discharge the water corresponding to the water accumulation location.

[0014] A second aspect of the present invention provides a road goaf filling construction system, comprising: A first drilling device is used to set at least one row of injection holes on both sides of the foundation perpendicular to the extension direction of the roadbed, each row of injection holes includes a plurality of injection holes arranged at intervals along the extension direction of the roadbed, and each injection hole penetrates the surface area of ​​the foundation and is connected to the goaf; A first filling device, used for injecting solid filling material into the goaf through each of the injection holes, until the solid filling material at the corresponding position of each of the injection holes reaches the top area of ​​the goaf; A vibration device is used to perform an impact operation on the solid filling material at the position corresponding to each injection hole, so that the solid filling material at the position corresponding to the injection hole is diffused toward the goaf corresponding to the position of the adjacent injection hole; The first filling device and the vibration device are used to repeat the injection and impact operations of the solid filling material in sequence until the goafs corresponding to the injection holes on both sides of the roadbed are filled with the solid filling material and form isolation walls, and the isolation walls and the goafs corresponding to the roadbed form a closed area; a second drilling device, for opening a plurality of grouting holes in an area corresponding to the enclosed area on the foundation; The second filling device is used to inject liquid filling material into the closed area through the grouting hole until the closed area is filled with the liquid filling material.

[0015] According to the road goaf filling construction method and system provided by the present invention, the road goaf filling construction method uses solid filling materials to fill and reinforce the goafs on both sides of the roadbed, and uses liquid filling materials to fill and reinforce the corresponding goafs within the bearing range below the roadbed, thereby reducing the reinforcement area and the amount of reinforcement work, saving filling materials, and reducing costs; and uses injection holes to inject solid filling materials into the goaf, and then combines the impact operation of the solid filling materials to improve the density of the goaf filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 Fill the existing goaf with grouting method; Figure 2 A geological exploration result map of the goaf provided in the embodiment of the present application; Figure 3 A road cross-sectional view of the arrangement of injection holes provided in an embodiment of the present application; Figure 4 A cross-sectional view of a road injected with solid filling material provided in an embodiment of the present application; Figure 5 A longitudinal section of a road injected with solid filling material provided in an embodiment of the present application; Figure 6 A cross-sectional view of a road impacted by a solid filler provided in an embodiment of the present application; Figure 7 A longitudinal section of a road impacted by a solid filler provided in an embodiment of the present application; Figure 8 A cross-sectional view of a road in which the goaf on both sides of the roadbed provided in the embodiment of the present application is filled with solid filling materials; Fig. 9 A longitudinal section of a road with goafs on both sides of the roadbed filled with solid filling materials provided in an embodiment of the present application; Fig.10 A road cross-sectional view of the arrangement of grouting holes provided in an embodiment of the present application; Fig.11 A longitudinal section of a road with grouting holes arranged according to an embodiment of the present application; Fig.12 A top view of the position distribution of injection holes and grouting holes in the punching area provided in an embodiment of the present application; Fig.13 An exemplary structural diagram of a vibration device provided in an embodiment of the present application.

[0017] In the above picture: 10 roadbed; 20 foundation; 201 goaf; 202 injection hole; 203 grouting hole; 30 solid filling material; 40 vibration device; 401 vibration rod; 4011 conical tip; 402 driving part; 50 air mass; 60 liquid filling material. DETAILED DESCRIPTION

[0018] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0021] Unless the context requires otherwise, throughout the specification and claims, the term "comprising" is to be construed in an open, inclusive sense, ie, meaning "including, but not limited to."

[0022] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" are intended to indicate that a specific feature, structure, material or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0024] When encountering unfilled underground goafs during roadbed construction, the traditional treatment methods include plugging and filling and grouting. The plugging and filling method is for goaf cavities with very shallow burial depths. Excavation is used to expose the goaf, and then materials such as stone flakes, concrete, and sandbags are used to build retaining wall partitions at the edge of the roadbed structure bearing capacity. Then, the area below the roadbed with bearing capacity requirements is filled with sand, gravel, clay and other materials. This method is mainly suitable for projects with good surrounding rock above and around the goaf, which can be excavated and exposed at low cost. It cannot be implemented for situations where the goaf is buried deep, the soil cover above the goaf is unstable, the materials and machinery are difficult to put into the goaf, the personnel have difficulty in operation, or the safety risks are high. Therefore, its scope of application is limited.

[0025] like Figure 1 As shown, the grouting method is to drill a small diameter grouting hole 203 on the ground, and then pour cement slurry, mortar or chemical slurry and other liquid filling materials 60 into the goaf through the grouting hole 203, so that the cavity of the goaf is completely filled. This method is suitable for the disposal of various goafs, but it also has the following shortcomings: First, when the goaf area is large, the grouting workload is large, the construction period is long, and the cost is high; second, it is difficult to accurately describe and simulate the three-dimensional space of the goaf due to the current detection technology, and it is impossible to ensure that the grouting hole 203 is at the top of the goaf cavity. If the grouting hole 203 is not positioned accurately, it is easy to form an air mass 50 at the highest point, and it is impossible to fill it densely, and the ideal foundation reinforcement effect cannot be achieved, which affects the bearing capacity of the foundation.

[0026] To solve the above problems, refer to Figures 2 to 12 According to a first aspect of an embodiment of the present application, a road goaf filling construction method is provided, comprising: S110: at least one row of injection holes 202 are respectively arranged on both sides of the foundation 20 perpendicular to the extension direction of the roadbed 10, each row of the injection holes 202 includes a plurality of injection holes 202 arranged at intervals along the extension direction of the roadbed 10, and each of the injection holes 202 penetrates the surface area of ​​the foundation 20 and is connected to the goaf 201.

[0027] refer to Figures 3 to 5, multiple injection holes 202 are respectively opened on both sides of the foundation 20 perpendicular to the extension direction of the roadbed 10, and the injection holes 202 on the same side of the roadbed 10 are arranged at intervals along the extension direction of the roadbed 10 to form a row of injection holes 202, and the spacing between two adjacent injection holes 202 can be equal or unequal, the diameter of the injection holes 202 is 300~600mm, and the spacing between the injection holes 202 is 2~3 meters. The injection holes 202 arranged in a row on both sides of the roadbed 10 facilitate the subsequent injection of solid filling materials 30 into the goaf 201 through the injection holes 202 to form an isolation wall, increase the stability of the goaf 201, and avoid the influence of unstable soil outside the isolation wall on the filling of the goaf 201 during the construction of the goaf 201 under the roadbed 10. In addition, multiple rows of injection holes 202 can be set on both sides of the roadbed 10 to increase the thickness of the isolation wall and further improve the stability of the goaf 201.

[0028] S120 : injecting solid filling material 30 into the goaf 201 through each of the injection holes 202 , until the solid filling material 30 at the corresponding position of each of the injection holes 202 reaches the top area of ​​the goaf 201 .

[0029] refer to Figures 4 to 5 Solid filling material 30 is injected into the goaf 201 through the injection hole 202. The solid filling material 30 includes crushed stone, sand, stone powder or other small-particle soil-rock mixture, etc. The goaf 201 is filled with the solid filling material 30 so that the goaf 201 corresponding to the roadbed 10 below the roadbed 10 reaches the bearing force range required by the roadbed 10 to meet the construction requirements of the roadbed 10.

[0030] S130 : performing an impact operation on the solid filling material 30 at the corresponding position of each injection hole 202 , so that the solid filling material 30 at the corresponding position of the injection hole 202 is diffused toward the goaf 201 corresponding to the position of the adjacent injection hole 202 .

[0031] When the solid filling material 30 at the corresponding position of each injection hole 202 reaches the top area of ​​the goaf 201, the solid filling material 30 can no longer be injected, and the goaf 201 is not actually filled. Figure 6 and Figure 7 , the solid filling material 30 at the corresponding position of each injection hole 202 is impacted so that the solid filling material 30 at the corresponding position of the injection hole 202 diffuses toward the goaf 201 corresponding to the position of the adjacent injection hole 202, which is convenient for the subsequent further injection operation of the solid filling material 30 and improves the compactness of the goaf 201.

[0032] S140: Repeat the injection and impact operations of the solid filling material 30 in sequence until the goaf 201 corresponding to the injection holes 202 on both sides of the roadbed 10 are filled with the solid filling material 30 and form an isolation wall, and the isolation wall and the goaf 201 corresponding to the roadbed 10 form a closed area.

[0033] refer to Figure 8 and Fig. 9 , and repeat steps S120 and S130 in sequence, such as injection, impact, injection, impact, etc. of solid filler 30, until the solid filler 30 diffuses to any adjacent injection holes 202 and the corresponding goaf 201 is filled with solid filler 30 and forms an isolation wall. The isolation walls on both sides of the roadbed 10 and the goaf 201 below the roadbed 10 are enclosed to form a closed area, and the closed area is filled with liquid filler 60. While meeting the bearing range requirements of the roadbed 10, the filling amount of the liquid filler 60 is minimized to save costs.

[0034] S150 : opening a plurality of grouting holes 203 in an area corresponding to the enclosed area on the foundation 20 , and injecting liquid filling material 60 into the enclosed area through the grouting holes 203 until the enclosed area is filled with the liquid filling material 60 .

[0035] refer to Fig.10 and Fig.11 The grouting hole 203 penetrates the surface area of ​​the foundation 20 and is connected to the goaf 201. The liquid filling material 60 is injected into the closed area through the grouting hole 203. The liquid filling material includes conventional materials such as mud, mortar or chemical slurry. The closed area is filled with the liquid filling material, so that the foundation 20 corresponding to the closed area meets the bearing range requirements of the roadbed 10, thereby realizing the reinforcement of the foundation 20 and meeting the construction requirements of the roadbed 10.

[0036] The road goaf filling construction method provided in the embodiment of the present application uses solid filling material 30 to fill the goaf 201 on both sides of the roadbed 10, and uses liquid filling material 60 to fill and reinforce the corresponding goaf 201 within the bearing range below the roadbed 10, thereby reducing the reinforcement area and the reinforcement engineering quantity, saving filling materials, and reducing costs; and uses the injection hole 202 to inject the solid filling material 30 into the goaf 201, and then combines the impact operation of the solid filling material 30 to improve the compactness of the goaf 201 filling. It is applicable to the surrounding rocks above and around the goaf 201 are good, the goaf 201 is buried deep, and the soil cover layer above the goaf 201 is poorly stable.

[0037] In some embodiments, reference Figures 2 to 12 , the method further comprises: S100: Determine a drilling area on the foundation 20 according to the relative position relationship between the area where the roadbed 10 is located and the goaf 201 in the foundation 20; The injection holes 202 are arranged respectively at the edge positions on both sides of the punching area perpendicular to the extension direction of the roadbed 10; the grouting holes 203 are arranged in the area corresponding to the closed area in the punching area, and the position distribution of the grouting holes 203 in the punching area is determined according to the depth information of the goaf 201.

[0038] refer to Figure 2 , conduct geological survey on the goaf 201 in the foundation 20, and obtain parameter information of the goaf 201, such as the depth, area and volume of the cavity in the goaf 201, the location and amount of water accumulation, the presence or absence of filling materials, etc., especially obtain information such as the depth, area and location of water accumulation in the goaf 201 within the bearing capacity range of the roadbed 10, so as to provide a basis for the subsequent processing of the goaf 201.

[0039] Through geological survey, the boundaries of the area where the roadbed 10 is located and the boundaries of the goaf 201 are determined, and based on the boundaries of the two, it is determined whether there is an overlapping area between the area where the roadbed 10 is located and the goaf 201, that is, the relative position relationship between the area where the roadbed 10 is located and the goaf 201 in the foundation 20 can make the overlapping area exist or not exist. If there is an overlapping area, the punching area at least covers the overlapping area to ensure that the corresponding goaf 201 within the bearing capacity range of the roadbed 10 can be filled with liquid filling material 60, and the injection workload can be minimized, shortening the construction period and saving costs.

[0040] refer to Figures 3 to 5 as well as Fig.12 , the position distribution of the grouting holes 203 in the drilling area is designed in combination with the depth information of each position of the goaf 201, so that the position distribution of the grouting holes 203 can meet the setting requirements of the goaf 201 of different depths, and ensure that the goaf 201 with high depths and the goaf 201 with low depths can be provided with corresponding grouting holes 203. When the liquid filling material 60 is filled into the corresponding goaf 201 through the grouting holes 203, each position of the goaf 201 can be filled with the liquid filling material 60, thereby avoiding the problem of air mass 50 formed at the highest point due to inaccurate positioning of the grouting holes 203, and improving the compactness of the filling of the goaf 201.

[0041] In some embodiments, in S100, determining the drilling area on the foundation 20 according to the relative position relationship between the area where the roadbed 10 is located and the goaf 201 in the foundation 20 includes: S111: Detecting the overlapping area between the roadbed 10 and the goaf 201; If the overlapping area is located in the area where the roadbed 10 is located, the area on the foundation 20 corresponding to the overlapping area is used as the punching area; If the overlapping area is partially located within the area where the roadbed 10 is located and partially located outside the area where the roadbed 10 is located, the area on the foundation 20 corresponding to the overlapping area and the area within a preset distance range outside the overlapping area is used as a drilling area, and the drilling area is located within the goaf 201.

[0042] Specifically, the area where the goaf 201 is located is determined through geological survey, and based on the area where the goaf 201 is located and the area where the roadbed 10 is located, the overlapping area between the goaf 201 and the roadbed 10 is determined.

[0043] If the overlapping area is located in the area where the roadbed 10 is located, the area on the foundation 20 corresponding to the overlapping area will be directly used as the drilling area. The drilling area can minimize the filling area of ​​the goaf 201 corresponding to the bearing capacity of the roadbed 10, reduce the amount of reinforcement work, save filling materials and reduce costs, etc. The setting of the drilling area can ensure that all positions of the goaf 201 can be covered, and can avoid invalid drilling settings of injection holes 202 outside the overlapping area. In this example, the injection holes 202 and the grouting holes 203 are both located in the area below the roadbed 10.

[0044] If part of the overlapping area is located within the area where the roadbed 10 is located, and the remaining part is outside the edge line of one side of the roadbed 10, then the area on the foundation 20 corresponding to the overlapping area and the corresponding area extended outward to the area within a preset distance range outside the roadbed 10 are used as the punching area, that is, the punching area covers the overlapping area and the area within a preset distance range outside the edge line of one side of the roadbed 10. In this example, the grouting hole 203 is located in the area below the roadbed 10, and the injection hole 202 is partially located in the area below the roadbed 10 and partially located within a preset distance range outside the edge line of the roadbed 10.

[0045] refer to Figures 2 to 12If the overlapping area is partially located in the area where the roadbed 10 is located, and the remaining part is located outside the edge lines on both sides of the roadbed 10, then the punching area covers the overlapping area and the area within a preset distance range outside the edge lines on both sides of the roadbed 10. In this example, the grouting hole 203 is located in the area below the roadbed 10, and the injection hole 202 is located within a preset distance range outside the edge lines on both sides of the roadbed 10. The setting of the punching area can ensure that the corresponding goaf 201 below the roadbed 10 is filled with solid filling materials 30, and the punching area is set within a preset distance range outside the roadbed 10 to ensure that the corresponding goaf 201 outside the roadbed 10 can also be filled with solid filling materials 30, so as to avoid the construction of the roadbed 10 being affected by the poor soil stability in the surrounding area outside the roadbed 10 during the construction of the roadbed 10. Among them, the preset distance range can be 1-3 meters, etc., and can also be set according to actual needs.

[0046] In this example, the drilling area at least covers the overlapping area of ​​the roadbed 10 and the goaf 201. The injection holes 202 are located at the edge positions on both sides of the drilling area along the direction perpendicular to the extension direction of the roadbed 10. The grouting holes 203 are located between the injection holes 202 on both sides of the roadbed 10. The foundation 20 in the area where the roadbed 10 has bearing capacity requirements is precisely reinforced to reduce construction costs and safety risks and achieve the best treatment effect.

[0047] In some embodiments, in S120, determining the position distribution of the grouting holes 203 in the drilling area according to the depth information of the goaf 201 includes: The grouting holes 203 are opened in the drilling area in an array distribution manner, and the distribution spacing of the grouting holes 203 corresponding to the area with a high depth in the goaf 201 is set to a first distance, and the distribution spacing of the grouting holes 203 corresponding to the area with a low depth in the goaf 201 is set to a second distance, and the first distance is smaller than the second distance.

[0048] Specifically, the grouting holes 203 are arranged in an array distribution manner in the drilling area, so that the grouting holes 203 can be arranged on the foundation 20 corresponding to each depth position of the goaf 201, ensuring that each position of the goaf 201 can be filled with liquid filler 60, and the position distribution of the grouting holes 203 is made to cover the deep area of ​​the goaf 201 as much as possible to be close to the highest vertex of the goaf 201, so as to avoid the air mass 50 formed by inaccurate positioning of the grouting holes 203.

[0049] The distribution spacing of the grouting holes 203 corresponding to the high-depth area in the goaf 201 is small, and the distribution spacing of the grouting holes 203 corresponding to the low-depth area in the goaf 201 is large. The distribution positions of the grouting holes 203 are determined according to the actual depth information of each position of the goaf 201, so as to ensure that the grouting holes 203 can be set at the highest vertex of the goaf 201, so that the goaf 201 can be completely filled, thereby improving the compactness of the goaf 201; and the goaf 201 corresponding to the high-depth goaf 201 has a fast injection speed, and the goaf 201 corresponding to the low-depth goaf has a slow injection speed, so that the goaf 201 corresponding to each depth position of the goaf 201 can reach the corresponding top area of ​​the goaf 201 as much as possible at the same time, maintain the consistency of injection, and improve the injection rate of the goaf 201.

[0050] For further reference, Fig.12 , the grouting holes 203 are opened in the punching area in an array distribution manner, including: A plurality of rows of grouting holes 203 are arranged at intervals along the extension direction of the roadbed 10 in an area on the foundation 20 opposite to the closed area, each row of grouting holes 203 includes a plurality of grouting holes 203 spaced apart and distributed along a direction perpendicular to the extension direction of the roadbed 10, and the grouting holes 203 in two adjacent rows of grouting holes 203 are staggered.

[0051] In this example, multiple rows of grouting holes 203 are arranged at intervals along the extension direction of the roadbed 10 in the area opposite to the closed area on the foundation 20, and the spacing between two adjacent rows of grouting holes 203 can be equal or unequal, and the number of grouting holes 203 included in each row of grouting holes 203 can be equal or unequal. Exemplarily, the diameter of the grouting hole 203 is 300~600mm. If the diameter of the grouting hole 203 is less than 300mm, the injection rate of the goaf 201 is slow and it is not conducive to the injection of liquid filling material 60; if the diameter of the grouting hole 203 is greater than 600mm, the number of grouting holes 203 distributed in the perforated area is small, which affects the injection effect of the goaf 201 and may cause the formation of air masses 50 in the goaf 201 with a high depth, which cannot be filled densely. The distance between two adjacent grouting holes 203 is 2 to 3 meters. A distance less than 2 meters is not conducive to the drilling operation of the grouting holes 203 . A distance greater than 3 meters results in a smaller number of grouting holes 203 distributed in the drilling area, affecting the injection efficiency of the goaf 201 .

[0052] Each grouting hole 203 in two adjacent rows of grouting holes 203 is staggered in a direction perpendicular to the extension direction of the roadbed 10. When the grouting holes 203 are performing the injection operation, the distribution position of the grouting holes 203 in the drilling area can enable the goaf 201 corresponding to the adjacent grouting holes 203 to be quickly filled, thereby improving the filling efficiency of the goaf 201 and avoiding the formation of air masses 50.

[0053] In some embodiments, S140 : using a vibration device 40 to impact the solid filler 30 at a position corresponding to each injection hole 202 , wherein the diameter of at least some parts of the vibration device 40 is smaller than the diameter of the injection hole 202 .

[0054] Some components of the vibration equipment can extend into the injection hole 202 to impact the solid filler 30, so that the solid filler 30 in the injection hole 202 can be better diffused in the goaf 201, thereby improving the compactness of the goaf 201 and increasing the firmness of the foundation 20.

[0055] In some embodiments, reference Fig.13 The vibration device 40 includes a vibration rod 401 and a driving unit 402 . The driving unit 402 is fixedly connected to the vibration rod 401 . The driving unit 402 drives the vibration rod 401 to reciprocate in the injection hole 202 to perform an impact operation on the solid filler 30 .

[0056] The driving part 402 can be a screw motor, a servo motor, a pneumatic cylinder, a hydraulic cylinder, etc. The driving part 402 is fixedly connected to the vibration rod 401. The diameter of the vibration rod 401 is smaller than the diameter of the main material hole. The driving part 402 can drive the vibration rod 401 to reciprocate in the injection hole 202 to repeatedly impact the solid filling material 30 in the injection hole 202. Among them, the driving part 402 and the vibration rod 401 are arranged in a one-to-one correspondence, so that the solid filling material 30 in each injection hole 202 is impacted by an independent vibration device 40; or, the output end of the driving part 402 is connected to a support plate, and a plurality of vibration rods 401 are arranged on the support plate, and the same driving part 402 is used to simultaneously drive the plurality of vibration rods 401 to perform impact operations on the solid filling materials 30 in the corresponding plurality of injection holes 202, thereby improving the impact efficiency. It should be noted that each vibration rod 401 can be slidably set on the support plate. If multiple rows of slide rails are set on the support plate, the support rod is slidably connected to the slide rails and fixed by locking members, and the locking members are bolts, etc., so that the distance between two adjacent vibration rods 401 on the same row of slide rails can be adjusted to meet the impact operation requirements of the solid filling material 30 in the injection holes 202 with different spacings.

[0057] In some embodiments, reference Fig.13 The end of the vibration rod 401 away from the driving part 402 has a conical tip 4011.

[0058] Specifically, when the vibration rod 401 performs the impact operation on the solid filler 30, its conical tip 4011 makes the contact area between the vibration rod 401 and the solid filler 30 smaller. The greater the impact force on the solid filler 30, on the one hand, the solid filler 30 can be better crushed, and on the other hand, the solid filler 30 can be better diffused in the goaf 201.

[0059] In some embodiments, the method further comprises: A detection component is set in the area of ​​any two adjacent injection holes 202 in the foundation 20, and the detection component is used to detect whether the goaf 201 corresponding to the adjacent injection holes 202 is filled with solid filling material 30. The detection component includes at least one of a photoelectric sensor, an ultrasonic sensor, a laser sensor or an infrared sensor.

[0060] Specifically, each detection component is arranged in the area of ​​the foundation 20 between two adjacent injection holes 202 and in the top area of ​​the goaf 201. Each detection component can be used to detect whether the goaf 201 corresponding to the adjacent injection holes 202 is filled with solid filler 30. When it is detected that it is filled, the injection and impact operations of the solid filler 30 are stopped. Otherwise, the injection and impact operations of the solid filler 30 are repeated until the goaf 201 corresponding to the injection hole 202 is filled.

[0061] Among them, the photoelectric sensor can emit and receive light. When the emitted light is blocked by the solid filler 30, the light returns and is received by the photoelectric sensor. The photoelectric sensor can detect the blocking information of the solid filler 30 in the goaf 201. The time difference between the light emission time and the reception time can be used to determine whether the goaf 201 is filled with the solid filler 30. If the time difference is less than the preset time threshold, the goaf 201 is filled with the solid filler 30; otherwise, the goaf 201 is not filled with the solid filler 30. Among them, the preset time threshold can be set according to actual needs. The ultrasonic sensor can emit ultrasonic waves and receive their reflected waves. The ultrasonic sensor can detect the blocking information of the solid filler 30 in the goaf 201, and then determine whether the goaf 201 is filled with the solid filler 30. The laser ranging sensor can emit laser and receive laser, and the infrared sensor can emit and receive infrared signals. The principle of determining whether the goaf 201 is filled with solid fillers 30 is the same as that of the photoelectric sensor, and this application will not repeat it.

[0062] In some embodiments, the method further comprises: Obtaining the water accumulation position in the goaf 201; If the water accumulation location is located within the closed area, the grouting hole 203 is used to discharge the water corresponding to the water accumulation location; if the water accumulation location is located outside the closed area, a drainage hole is opened on the foundation 20 outside the drilling area, and the drainage hole passes through the surface area of ​​the foundation 20 and is connected with the goaf 201, and the water corresponding to the water accumulation location is discharged through the drainage hole.

[0063] The water accumulation detection sensor can be used to obtain information such as the location and amount of water accumulation in the goaf 201. If the water accumulation location is located in a closed area, the grouting hole 203 corresponding to the water accumulation location is used to drain the water. After the water accumulation at the water accumulation location is drained, the grouting hole 203 corresponding to the water accumulation location is used to perform the injection operation of the liquid filling material 60, so as to realize the recycling of the same grouting hole 203, reduce the drilling operation of the drainage hole, and reduce the cost. It should be noted that when the water accumulation operation is performed at the water accumulation location, the goaf 201 corresponding to the non-water accumulation location can simultaneously perform the injection of the liquid filling material 60, so as to improve the reinforcement efficiency of the goaf 201.

[0064] If the water accumulation location is outside the closed area, a drainage hole is opened in the area corresponding to the water accumulation location on the foundation 20 to discharge the accumulated water outside the goaf area 201 through the drainage hole to prevent the accumulated water from affecting the processing effect of the goaf area 201.

[0065] The present application also provides a road goaf filling construction system, including: A first drilling device is used to set at least one row of injection holes 202 on both sides of the foundation 20 perpendicular to the extension direction of the roadbed 10, each row of injection holes 202 includes a plurality of injection holes 202 arranged at intervals along the extension direction of the roadbed 10, and each injection hole 202 penetrates the surface area of ​​the foundation 20 and is connected to the goaf 201; A first filling device, used for injecting solid filling material 30 into the goaf 201 through each of the injection holes 202 until the solid filling material 30 at the corresponding position of each of the injection holes 202 reaches the top area of ​​the goaf 201; The vibration device 40 is used to perform an impact operation on the solid filling material 30 at the corresponding position of each injection hole 202, so that the solid filling material 30 at the corresponding position of the injection hole 202 is diffused toward the goaf 201 corresponding to the position of the adjacent injection hole 202; The first filling device and the vibration device 40 are used to repeat the injection and impact operations of the solid filling material 30 in sequence until the goaf 201 corresponding to the injection holes 202 on both sides of the roadbed 10 are filled with the solid filling material 30 and form an isolation wall, and the isolation wall and the goaf 201 corresponding to the roadbed 10 form a closed area; A second drilling device, used for opening a plurality of grouting holes 203 in an area corresponding to the closed area on the foundation 20; The second filling device is used to inject the liquid filling material 60 into the closed area through the grouting hole 203 until the closed area is filled with the liquid filling material 60.

[0066] Specifically, the first drilling equipment performs a drilling operation of the injection hole 202 on the foundation 20 , so that the injection hole 202 penetrates the surface area of ​​the foundation 20 and communicates with the goaf 201 , so as to facilitate the subsequent injection of solid filling material 30 into the goaf 201 through the injection hole 202 .

[0067] The first filling device injects solid filling material 30 into the goaf 201 through the injection hole 202, and uses the solid filling material 30 to fill the goaf 201, so that the goaf 201 corresponding to the roadbed 10 reaches the bearing force range required by the roadbed 10, meeting the construction requirements of the roadbed 10.

[0068] When the solid filling material 30 at the corresponding position of each injection hole 202 reaches the top area of ​​the goaf 201, the solid filling material 30 at the corresponding position of each injection hole 202 is impacted by the vibration equipment 40 to make the solid filling material 30 at the corresponding position of the injection hole 202 diffuse toward the goaf 201 corresponding to the position of the adjacent injection hole 202.

[0069] The filling equipment and the vibration equipment 40 repeat the injection and impact operations of the solid filler 30 in sequence until the solid filler 30 diffuses to the goaf 201 corresponding to any adjacent injection holes 202 and is filled with the solid filler 30, so that the goaf 201 corresponding to the injection holes 202 is filled with the solid filler 30 and an isolation wall is formed. The isolation walls on both sides of the roadbed 10 and the goaf 201 below the roadbed 10 enclose a closed area.

[0070] The second drilling equipment opens a plurality of grouting holes 203 in the area corresponding to the closed area on the foundation 20, and the grouting holes 203 penetrate the surface area of ​​the foundation 20 and are connected with the goaf 201; the second filling equipment injects liquid filling material 60 into the closed area through the grouting holes 203 until the closed area is filled with the liquid filling material 60, so that the foundation 20 corresponding to the goaf 201 reaches the bearing capacity range requirement of the roadbed 10, thereby realizing the reinforcement of the foundation 20 and meeting the construction requirements of the roadbed 10.

[0071] The road goaf filling construction system provided in the embodiments of the present application is used to execute the road goaf filling construction method provided in any embodiment of the present application. The specific technical features and technical effects of the filling system are consistent with the filling method, and will not be repeated in this application.

[0072] In some embodiments, the system further comprises: The planning equipment is used to determine the drilling area on the foundation 20 according to the relative position relationship between the area where the roadbed 10 is located and the goaf 201 in the foundation 20, to determine the position distribution of the injection holes 202 in the drilling area, and to determine the position distribution of the grouting holes 203 in the drilling area according to the depth information of the goaf 201.

[0073] The planning equipment includes an exploration module and a processing module, wherein the exploration module includes a multifunctional exploration instrument or / and a seismic exploration device. The multifunctional exploration instrument reflects the change of underground resistivity by measuring the strength of the natural electromagnetic field, thereby analyzing and judging the location, size, depth and other related information of the underground goaf 201. The seismic exploration device arranges a series of detectors on the surface of the foundation 20 to receive the reflected wave or refracted wave signal of the artificially excited seismic wave after propagating underground. When the seismic wave encounters different stratum media, such as propagating from the rock layer to the cavity of the goaf 201, its propagation speed, amplitude, frequency and other characteristics will change. The change is recorded by the seismograph, and after data processing and interpretation, the location and shape of the underground goaf 201 can be inferred. According to the area where the goaf 201 is located and the area where the roadbed 10 is located collected by the exploration module, the drilling area on the foundation 20 is determined.

[0074] The processing module includes a processor, etc. The processing module is used to obtain the depth information of the goaf 201 collected by the exploration module, and determine the position distribution of the injection holes 202 in the perforated area based on the depth information of the goaf 201. The processing module also determines the position distribution of the injection holes 202 based on the determined perforated area.

[0075] The first drilling device performs a drilling operation on both sides of the roadbed 10 in the drilling area based on the drilling area determined by the processing module to open a material injection hole 202 on the foundation 20. The second drilling device performs a drilling operation on the foundation 20 based on the position distribution information of the grouting hole 203 in the drilling area determined by the processing module to open a grouting hole 203 in the surface area of ​​the foundation 20 that is connected to the goaf 201.

[0076] In some embodiments, the exploration module further includes: A detection unit, used to detect the overlapping area between the area where the roadbed 10 is located and the goaf 201; The processing unit is used to determine the punching area based on the relative position relationship between the overlapping area and the area where the roadbed 10 is located, as follows: If the overlapping area is located in the area where the roadbed 10 is located, the area on the roadbed 10 corresponding to the overlapping area is used as the punching area; If the overlapping area is partially located within the area where the roadbed 10 is located and partially located outside the area where the roadbed 10 is located, the area on the roadbed 10 corresponding to the overlapping area and the area within a preset distance range outside the overlapping area is used as a drilling area, and the drilling area is located within the goaf 201.

[0077] In some embodiments, the processing module is used to obtain the depth information of the goaf 201 collected by the exploration module, determine the array distribution pattern of the grouting holes 203 in the drilling area based on the depth information of the goaf 201, and set the distribution spacing of the grouting holes 203 corresponding to the area with a high depth of the goaf 201 to a first distance, and set the distribution spacing of the grouting holes 203 corresponding to the area with a low depth of the goaf 201 to a second distance, and the first distance is smaller than the second distance.

[0078] In some embodiments, the second drilling equipment is used to open a plurality of rows of grouting holes 203 in the drilling area along the extension direction of the roadbed 10, each row of grouting holes 203 includes a plurality of grouting holes 203 spaced apart and distributed along a direction perpendicular to the extension direction of the roadbed 10, and the grouting holes 203 in two adjacent rows of grouting holes 203 are staggered.

[0079] In some embodiments, the vibration device 40 is used to impact the solid filler 30 at the corresponding position of each injection hole 202, and the diameter of at least some parts of the vibration device 40 is smaller than the diameter of the injection hole 202. Further, the vibration device 40 includes a vibration rod 401 and a driving part 402, the driving part 402 is fixedly connected to the vibration rod 401, and the driving part 402 is used to drive the vibration rod 401 to reciprocate in the injection hole 202 to impact the solid filler 30; the end of the vibration rod 401 away from the driving part 402 has a conical tip 4011.

[0080] In some embodiments, the filling system also includes a detection device, which is arranged in the foundation 20 within the area of ​​any two adjacent injection holes 202. The detection device is used to detect whether the goaf 201 corresponding to the adjacent injection holes 202 is filled with solid filling material 30. The detection device includes at least one of a photoelectric sensor, an ultrasonic sensor, a laser sensor or an infrared sensor.

[0081] The first filling device is used to obtain the information detected by the detection member, and determine whether to start the filling device in response to the information detected by the detection member. If the detection member detects that the goaf 201 is filled with solid filling material 30, the first filling device stops starting; if the detection member detects that the goaf 201 is not filled with solid filling material 30, the first filling device starts and injects solid filling material 30 into the injection hole 202.

[0082] In some embodiments, the filling system further includes a water accumulation detection sensor, and the water accumulation detection sensor is used to obtain the water accumulation position in the goaf 201; The processing module is used to obtain the water accumulation position information uploaded by the water accumulation detection sensor, and determine the drainage method of the goaf 201 based on the water accumulation position information. If the water accumulation position is located in the closed area, the grouting hole 203 is used to discharge the water corresponding to the water accumulation position; if the water accumulation position is located outside the closed area, the drainage hole outside the closed area is used to discharge the water corresponding to the water accumulation position. The drainage hole is formed by drilling with drilling equipment, and the injection hole 202 and the drainage hole corresponding to the water discharge are connected to a pump, and the water is discharged by the pump.

[0083] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. A road goaf filling construction method, characterized in that: include: At least one row of injection holes is respectively arranged on both sides of the foundation perpendicular to the extension direction of the roadbed, each row of injection holes includes a plurality of injection holes arranged at intervals along the extension direction of the roadbed, and each injection hole penetrates the surface area of ​​the foundation and is connected to the goaf; Injecting solid filling material into the goaf through each of the injection holes until the solid filling material at a position corresponding to each of the injection holes reaches the top area of ​​the goaf; Then, the solid filling material at the position corresponding to each injection hole is impacted, so that the solid filling material at the position corresponding to the injection hole is diffused toward the goaf corresponding to the position of the adjacent injection hole; Repeat the injection and impact operations of the solid filling material in sequence until the goafs corresponding to the injection holes on both sides of the roadbed are filled with the solid filling material and form isolation walls, and the isolation walls and the goafs corresponding to the roadbed form a closed area; A plurality of grouting holes are opened in the area corresponding to the enclosed area on the foundation, and liquid filling material is injected into the enclosed area through the grouting holes until the enclosed area is filled with the liquid filling material.

2. The road goaf filling construction method according to claim 1 is characterized in that: The method further comprises: Determine the drilling area on the foundation according to the relative position relationship between the roadbed area and the goaf area in the foundation; The injection holes are arranged respectively at the edge positions on both sides of the perforated area perpendicular to the extension direction of the roadbed; the grouting holes are arranged in the area corresponding to the closed area in the perforated area, and the position distribution of the grouting holes in the perforated area is determined according to the depth information of the goaf.

3. The road goaf filling construction method according to claim 2 is characterized in that: Determining the drilling area on the foundation according to the relative position relationship between the roadbed area and the goaf area in the foundation includes: Detecting the overlapping area between the roadbed area and the goaf area; If the overlapping area is located in the area where the roadbed is located, the area on the foundation corresponding to the overlapping area is used as the punching area; If the overlapping area is partially located within the area where the roadbed is located and partially located outside the area where the roadbed is located, the area on the foundation corresponding to the overlapping area and the area within a preset distance range outside the overlapping area is used as the drilling area, and the drilling area is located within the goaf.

4. The road goaf filling construction method according to claim 2 is characterized in that: Determining the position distribution of the grouting holes in the drilling area according to the depth information of the goaf includes: The grouting holes are opened in the drilling area in an array distribution manner, and the distribution spacing of the grouting holes corresponding to the area with high depth in the goaf is set to a first distance, and the distribution spacing of the grouting holes corresponding to the area with low depth in the goaf is set to a second distance, and the first distance is smaller than the second distance.

5. The road goaf filling construction method according to claim 4 is characterized in that: The grouting holes are opened in the punching area in an array distribution manner, comprising: A plurality of rows of grouting holes are arranged in the punching area along the extension direction of the roadbed at intervals, each row of grouting holes includes a plurality of grouting holes distributed at intervals perpendicular to the extension direction of the roadbed, and the grouting holes in two adjacent rows of grouting holes are staggered.

6. The road goaf filling construction method according to claim 1 is characterized in that: A vibration device is used to impact the solid filling material at the corresponding position of each injection hole, and the diameter of at least some parts of the vibration device is smaller than the diameter of the injection hole.

7. The road goaf filling construction method according to claim 6 is characterized in that: The vibration device comprises a vibration rod and a driving part, wherein the driving part is fixedly connected to the vibration rod, and the driving part is used to drive the vibration rod to reciprocate in the injection hole to perform an impact operation on the solid filler.

8. The road goaf filling construction method according to any one of claims 1 to 7, characterized in that: The method further comprises: A detection component is set in the area of ​​any two adjacent injection holes in the foundation, and the detection component is used to detect whether the goaf corresponding to the adjacent injection holes is filled with solid filling material. The detection component includes at least one of a photoelectric sensor, an ultrasonic sensor, a laser sensor or an infrared sensor.

9. The road goaf filling construction method according to any one of claims 1 to 7, characterized in that: The method further comprises: Obtaining the water accumulation position in the goaf; If the water accumulation location is located within the closed area, the grouting hole is used to discharge the accumulated water corresponding to the water accumulation location; if the water accumulation location is located outside the closed area, a drainage hole is opened on the foundation outside the closed area, and the drainage hole passes through the surface area of ​​the foundation and is connected with the goaf, and the drainage hole is used to discharge the accumulated water corresponding to the water accumulation location.

10. A road goaf filling construction system, characterized in that: include: A first drilling device is used to set at least one row of injection holes on both sides of the foundation perpendicular to the extension direction of the roadbed, each row of injection holes includes a plurality of injection holes arranged at intervals along the extension direction of the roadbed, and each injection hole penetrates the surface area of ​​the foundation and is connected to the goaf; A first filling device, used for injecting solid filling material into the goaf through each of the injection holes, until the solid filling material at the corresponding position of each of the injection holes reaches the top area of ​​the goaf; A vibration device is used to perform an impact operation on the solid filling material at the position corresponding to each injection hole, so that the solid filling material at the position corresponding to the injection hole is diffused toward the goaf corresponding to the position of the adjacent injection hole; The first filling device and the vibration device are used to repeat the injection and impact operations of the solid filling material in sequence until the goafs corresponding to the injection holes on both sides of the roadbed are filled with the solid filling material and form isolation walls, and the isolation walls and the goafs corresponding to the roadbed form a closed area; a second drilling device, for opening a plurality of grouting holes in an area corresponding to the enclosed area on the foundation; The second filling device is used to inject liquid filling material into the closed area through the grouting hole until the closed area is filled with the liquid filling material.

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