Method and device for generating surrounding rock-filling body sample

Abstract

The invention provides a method and device for generating a surrounding rock-filling body sample, and the method comprises the steps: obtaining the lithologic characteristics of surrounding rock at a to-be-experimented part, the raw material ratio of a filling body, and first three-dimensional point cloud data of a surrounding rock-filling body contact surface; performing regular gridding processing on the first three-dimensional point cloud data to obtain regularized second three-dimensional point cloud data; inputting the second three-dimensional point cloud data into a 3D printing device, so that the 3D printing device prints a surrounding rock test piece based on the second three-dimensional point cloud data and a printing material pre-placed in the 3D printing device; after the surrounding rock test piece is placed in a mold, filling slurry is poured into the mold so that the filling slurry can make complete contact with the target face of the surrounding rock test piece, and after the filling slurry poured into the mold is solidified and formed, a surrounding rock-filling body sample is obtained. By means of the method, the convenience and efficiency of generating the surrounding rock-filling body sample are improved.

Description

Technical Field

[0001] The present application relates to the technical field of mining engineering, and in particular to a method and device for generating surrounding rock-filling body samples. Background Art

[0002] In recent years, as mining safety has received more and more attention, researchers have conducted a lot of research on the shear failure stress (i.e., shear stress) of the surrounding rock-backfill interface. Among them, the surrounding rock usually refers to the surrounding rock mass whose stress state changes due to the influence of excavation, and the backfill is the whole formed after the backfill material is filled into the goaf. The surrounding rock-backfill interface refers to the interface where the backfill and the surrounding rock mass contact and interact in rock underground engineering.

[0003] In the prior art, in order to study the shear failure stress of the surrounding rock-backfill interface, researchers usually need to go to the actual mining site of the mine, take surrounding rock-backfill samples by the original coring method, and then bring them back to the laboratory for shear failure experiments. It is difficult to collect a large number of surrounding rock-backfill samples at one time by actually taking surrounding rock-backfill samples at the mine. Since each experiment requires a surrounding rock-backfill sample, if multiple experiments are required, researchers need to go to the mine multiple times to take surrounding rock-backfill samples. It can be seen that the process of taking surrounding rock-backfill samples using this method is complicated and cumbersome, and the efficiency is low. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a method and device for generating surrounding rock-backfill samples, so as to improve the convenience and efficiency of generating surrounding rock-backfill samples.

[0005] In a first aspect, an embodiment of the present application provides a method for generating a surrounding rock-filling body sample, comprising: Obtaining the lithological characteristics of the surrounding rock at the test site, the raw material ratio of the filling body, and the first three-dimensional point cloud data of the contact surface between the surrounding rock and the filling body; wherein the first three-dimensional point cloud data is obtained by three-dimensionally scanning the contact surface between the surrounding rock and the filling body at the test site in the actual mine stope using a three-dimensional laser scanner; Performing regular gridding processing on the first three-dimensional point cloud data to obtain regularized second three-dimensional point cloud data; Inputting the second three-dimensional point cloud data into a 3D printing device, so that the 3D printing device prints a surrounding rock specimen based on the second three-dimensional point cloud data and a printing material pre-placed in the 3D printing device; wherein the printing material is determined according to the lithological characteristics, and the target surface of the surrounding rock specimen is a simulated contact surface of the surrounding rock-filling body contact surface; After the surrounding rock specimen is placed in the mold, the pre-generated filling slurry is poured into the mold so that the filling slurry is in complete contact with the target surface of the surrounding rock specimen. After the filling slurry poured into the mold solidifies and takes shape, a surrounding rock-filling body sample is obtained; wherein the filling slurry is prepared according to the raw material ratio of the filling body.

[0006] In combination with the first aspect, the embodiment of the present application provides a first possible implementation of the first aspect, wherein, after placing the surrounding rock specimen in a mold, pouring a pre-generated filling slurry into the mold so that the filling slurry is in full contact with a target surface of the surrounding rock specimen, and after the filling slurry poured into the mold solidifies and forms, a surrounding rock-filling body sample is obtained, including: After placing the surrounding rock specimen in the mold, pouring the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen; The mold is placed in a curing environment, and the temperature and / or humidity of the curing environment is adjusted to obtain a simulated environment of an actual mine site, so that the filling slurry poured into the mold solidifies and forms in the simulated environment of an actual mine site to obtain a surrounding rock-filling body sample.

[0007] In combination with the first aspect or the first possible implementation manner of the first aspect, the embodiment of the present application provides a second possible implementation manner of the first aspect, wherein the shapes of the other surfaces of the surrounding rock specimen except the target surface are mutually adapted to the bottom surface and the side surface of the mold, and the mold is a top-opening mold; After placing the surrounding rock specimen in the mold, pouring the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen, including: placing the surrounding rock specimen into the mold with the target surface facing upward; The pre-generated filling slurry is poured into the mold from the top of the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen.

[0008] In combination with the first aspect, the embodiment of the present application provides a third possible implementation of the first aspect, wherein the surrounding rock-backfilling body sample is used to perform a shear failure experiment to obtain a first shear failure stress of the surrounding rock-backfilling body contact surface.

[0009] In combination with the third possible implementation of the first aspect, the embodiment of the present application provides a fourth possible implementation of the first aspect, wherein, after obtaining a plurality of surrounding rock-filling body samples and the first shear failure stress corresponding to each of the surrounding rock-filling body samples, the method further includes: A target formula is established based on the first three-dimensional point cloud data and the shear failure stress corresponding to each of the surrounding rock-backfill body samples; wherein the target formula is used to reflect the changing relationship between the three-dimensional point cloud data of the surrounding rock-backfill body contact surface and the shear failure stress of the surrounding rock-backfill body contact surface.

[0010] In combination with the fourth possible implementation of the first aspect, the embodiment of the present application provides a fifth possible implementation of the first aspect, wherein, after obtaining the target formula, the method further includes: Obtaining the third 3D point cloud data of the surrounding rock-filling body contact surface at the position to be detected; The third three-dimensional point cloud data is input into the target formula, and the second shear failure stress of the surrounding rock-filling body contact surface at the position to be detected is output.

[0011] In combination with the second possible implementation of the first aspect, the embodiment of the present application provides a sixth possible implementation of the first aspect, wherein the shape of the mold is a cylinder or a cuboid.

[0012] In combination with the first aspect, the embodiment of the present application provides a seventh possible implementation of the first aspect, wherein the lithological characteristics include rock type and rock strength.

[0013] In a second aspect, an embodiment of the present application further provides a device for generating a surrounding rock-filling body sample, comprising: The first acquisition module is used to obtain the lithological characteristics of the surrounding rock at the test site, the raw material ratio of the filling body, and the first three-dimensional point cloud data of the contact surface between the surrounding rock and the filling body; wherein the first three-dimensional point cloud data is obtained by three-dimensionally scanning the contact surface between the surrounding rock and the filling body at the test site in the actual mining site of the mine using a three-dimensional laser scanner; A processing module, used for performing regular gridding processing on the first three-dimensional point cloud data to obtain regularized second three-dimensional point cloud data; a printing module, used for inputting the second three-dimensional point cloud data into a 3D printing device, so that the 3D printing device prints out a surrounding rock specimen based on the second three-dimensional point cloud data and a printing material pre-placed in the 3D printing device; wherein the printing material is determined according to the lithological characteristics, and the target surface of the surrounding rock specimen is a simulated contact surface of the surrounding rock-filling body contact surface; A pouring module is used to pour the pre-generated filling slurry into the mold after the surrounding rock specimen is placed in the mold, so that the filling slurry is in complete contact with the target surface of the surrounding rock specimen, and after the filling slurry poured into the mold solidifies and takes shape, a surrounding rock-filling body sample is obtained; wherein the filling slurry is prepared according to the raw material ratio of the filling body.

[0014] In combination with the second aspect, the embodiment of the present application provides a first possible implementation of the second aspect, wherein the pouring module is used to pour the pre-generated filling slurry into the mold after placing the surrounding rock specimen into the mold, so that the filling slurry is in full contact with the target surface of the surrounding rock specimen, and after the filling slurry poured into the mold is solidified and formed, when a surrounding rock-filling body sample is obtained, it is specifically used to: After placing the surrounding rock specimen in the mold, pouring the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen; The mold is placed in a curing environment, and the temperature and / or humidity of the curing environment is adjusted to obtain a simulated environment of an actual mine site, so that the filling slurry poured into the mold solidifies and forms in the simulated environment of an actual mine site to obtain a surrounding rock-filling body sample.

[0015] The embodiment of the present application provides a method and device for generating surrounding rock-backfill samples. When obtaining surrounding rock-backfill samples, researchers only need to go to the actual mining site of the mine once, and use a three-dimensional laser scanner to perform three-dimensional scanning on several surrounding rock-backfill contact surfaces, and then they can obtain the first three-dimensional point cloud data of several surrounding rock-backfill contact surfaces. Then, they can return to the laboratory and use 3D printing technology to replicate several surrounding rock-backfill samples, without the need for researchers to go to the mine many times to take surrounding rock-backfill samples. It can be seen that the method of this embodiment is conducive to improving the convenience and efficiency of generating surrounding rock-backfill samples. In addition, it is also possible to reproduce the natural morphological characteristics of the surrounding rock-backfill contact surface with high precision, which is conducive to ensuring the accuracy of the generated surrounding rock-backfill samples.

[0016] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A flow chart of a method for generating surrounding rock-filling body samples provided in an embodiment of the present application is shown; Figure 2 A side view of a surrounding rock specimen provided in an embodiment of the present application when the surrounding rock specimen is a rectangular parallelepiped is shown; Figure 3 A side view of placing a surrounding rock specimen into a mold provided by an embodiment of the present application when both the surrounding rock specimen and the mold are rectangular parallelepipeds is shown; Figure 4 A schematic structural diagram of a device for generating surrounding rock-filling body samples provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0019] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0020] Considering that it is difficult to collect a large number of surrounding rock-filling samples at one time by actually taking surrounding rock-filling samples in mines, based on this, an embodiment of the present application provides a method and device for generating surrounding rock-filling samples, which is described below through embodiments.

[0021] To facilitate understanding of this embodiment, a method for generating a surrounding rock-filling body sample disclosed in an embodiment of this application is first described in detail. Figure 1 As shown, the following steps S101-S104 are included: S101: Obtain the lithological characteristics of the surrounding rock at the test site, the raw material ratio of the filling body, and the first three-dimensional point cloud data of the contact surface between the surrounding rock and the filling body; wherein the first three-dimensional point cloud data is obtained by three-dimensionally scanning the contact surface between the surrounding rock and the filling body at the test site in the actual mining area of ​​the mine using a three-dimensional laser scanner.

[0022] In mining projects, surrounding rock refers to the surrounding rock mass that has undergone a change in stress state due to the influence of excavation. The backfill is the whole formed after the backfill material is filled into the goaf. The backfill is mainly used to support the rock mass around the mining area to reduce the deformation and falling of the surrounding rock in the mining area. The surrounding rock-backfill contact surface refers to the interface where the backfill and the surrounding rock mass (surrounding rock) contact and interact with each other.

[0023] The place to be tested is a part of the actual mining area of ​​the mine. There can be multiple places to be tested. When there are multiple places to be tested, researchers can perform three-dimensional scanning on the surrounding rock-filling body contact surface of each place to be tested in the actual mining area of ​​the mine separately or all at once to obtain the first three-dimensional point cloud data of the surrounding rock-filling body contact surface of each place to be tested. The first three-dimensional point cloud data is the three-dimensional point cloud data of a surface (surrounding rock-filling body contact surface), and each place to be tested corresponds to one first three-dimensional point cloud data.

[0024] In this embodiment, the lithology characteristics include rock mass type and rock mass strength. The raw materials of the filling body usually include cement, tailings, and water, and the raw material ratio of the filling body usually refers to the ratio between cement, tailings, and water.

[0025] S102: performing regular gridding processing on the first three-dimensional point cloud data to obtain regularized second three-dimensional point cloud data.

[0026] In this embodiment, the first three-dimensional point cloud data obtained by scanning with a three-dimensional laser scanner usually exists in the form of a discrete point set. The spatial distribution of the point cloud data in the first three-dimensional point cloud data is usually irregular, and there is a lack of clear topological relationship between points, which makes data processing and analysis complicated.

[0027] In this embodiment, for each first three-dimensional point cloud data, after the first three-dimensional point cloud data is subjected to regular gridding processing, the first three-dimensional point cloud data is converted into regular second three-dimensional point cloud data, and each location to be tested corresponds to a second three-dimensional point cloud data. The second three-dimensional point cloud data after regular gridding processing has a clear topological relationship, and the points are connected by grid units, which greatly simplifies the data processing and analysis process.

[0028] S103: Input the second three-dimensional point cloud data into the 3D printing device, so that the 3D printing device prints out a surrounding rock specimen based on the second three-dimensional point cloud data and the printing material pre-placed in the 3D printing device; wherein the printing material is determined according to the lithological characteristics, and the target surface of the surrounding rock specimen is a simulated contact surface of the surrounding rock-backfill contact surface.

[0029] In this embodiment, according to the lithological characteristics of the surrounding rock and the material characteristics of each printing material, the printing material with the highest similarity to the lithological characteristics of the surrounding rock is selected from a plurality of printing materials, so that the material characteristics of the selected printing material have a high similarity to the lithological characteristics of the surrounding rock. After the printing material is selected, the printing material is installed in the 3D printing device.

[0030] Next, the second three-dimensional point cloud data is input into a 3D printing device, and the 3D printing device prints out a three-dimensional surrounding rock specimen based on the second three-dimensional point cloud data and printing materials.

[0031] In this embodiment, since the surrounding rock specimen is printed based on the second three-dimensional point cloud data of the surrounding rock-backfill contact surface, one of the surfaces of the surrounding rock specimen (i.e., the target surface) is a simulated contact surface of the surrounding rock-backfill contact surface. In other words, one of the surfaces of the surrounding rock specimen (i.e., the target surface) is basically the same in shape as the actual surrounding rock-backfill contact surface.

[0032] In this embodiment, the printed surrounding rock specimen can be a cuboid (including a cube), the target surface in the cuboid (i.e., one surface in the cuboid) is substantially the same as the actual surrounding rock-filling body contact surface, and the remaining five surfaces are planes. Alternatively, the printed surrounding rock specimen can also be a cylinder, the target surface in the upper and lower surfaces of the cylinder is substantially the same as the actual surrounding rock-filling body contact surface, and the side surface and the remaining surfaces are smooth surfaces.

[0033] For example, Figure 2 As shown, a side view of the surrounding rock specimen is shown when the surrounding rock specimen is a rectangular parallelepiped.

[0034] S104: After placing the surrounding rock specimen in the mold, pour the pre-generated filling slurry into the mold so that the filling slurry is in complete contact with the target surface of the surrounding rock specimen, and after the filling slurry poured into the mold solidifies and takes shape, a surrounding rock-filling body sample is obtained; wherein, the filling slurry is prepared according to the raw material ratio of the filling body.

[0035] In this embodiment, the shape of the mold is a cylinder or a cuboid, and the shape and size of the surrounding rock specimen should match the shape and size of the mold. Specifically, the shapes of the other surfaces of the surrounding rock specimen except the target surface should match the bottom surface and side surfaces of the mold, so that the surrounding rock specimen can be placed in the mold. Figure 3 , which shows a side view of placing the surrounding rock specimen into the mold when both the surrounding rock specimen and the mold are rectangular.

[0036] In a possible implementation manner, when executing step S104, the following steps may be specifically performed: S1041: After placing the surrounding rock specimen in the mold, pour the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen.

[0037] S1042: placing the mold in a curing environment, and obtaining a simulated environment of an actual mine site by adjusting the temperature and / or humidity of the curing environment, so that the filling slurry poured into the mold solidifies and takes shape in the simulated environment of the actual mine site, thereby obtaining a surrounding rock-filling body sample.

[0038] In this embodiment, the temperature and / or humidity of the maintenance environment are adjusted based on the actual temperature and / or humidity of the actual mine site, so that the maintenance environment simulates the actual environment of the actual mine site. At this time, the entire process of the filling slurry from a solid-liquid mixed state to a solid state after complete cementation is completed in the maintenance environment (i.e., the simulated environment of the actual mine site), which is beneficial to improve the accuracy of the shear failure stress obtained in the subsequent shear failure experiment on the surrounding rock-filling body samples.

[0039] In a possible implementation, Figure 3 As shown, the mold is a top-opening mold; after the surrounding rock specimen is placed in the mold in the execution step, the pre-generated filling slurry is poured into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen, which can be specifically performed according to the following steps: The filling slurry is prepared according to the raw material ratio of the filling body. Then, the target surface of the surrounding rock specimen is placed in the mold with the target surface facing upward; the prepared (i.e., pre-generated) filling slurry is poured into the mold from the top of the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen. After the filling slurry poured into the mold solidifies and forms, a solidified surrounding rock-filling body sample is obtained. At this time, after removing the mold outside the surrounding rock-filling body sample, the final surrounding rock-filling body sample is obtained.

[0040] In a possible implementation manner, the obtained surrounding rock-backfill body sample is used to perform a shear failure test to obtain a first shear failure stress of the surrounding rock-backfill body contact surface.

[0041] In a possible implementation, after obtaining a plurality of (ie, multiple) surrounding rock-filling body samples and the first shear failure stress corresponding to each surrounding rock-filling body sample, the following steps may be performed: Based on the first three-dimensional point cloud data and shear failure stress corresponding to each surrounding rock-backfill body sample, a target formula is established; wherein the target formula is used to reflect the changing relationship between the three-dimensional point cloud data of the surrounding rock-backfill body contact surface and the shear failure stress of the surrounding rock-backfill body contact surface.

[0042] In this embodiment, in the target formula, the three-dimensional point cloud data of the surrounding rock-backfill contact surface is used as the independent variable, and the shear failure stress of the surrounding rock-backfill contact surface is used as the dependent variable.

[0043] In a possible implementation, after obtaining the target formula, the following steps may be performed: Obtaining the third 3D point cloud data of the surrounding rock-filling body contact surface at the position to be detected; The third three-dimensional point cloud data is input into the target formula, and the second shear failure stress of the surrounding rock-filling body contact surface at the position to be detected is output.

[0044] It can be seen that after constructing the target formula, the shear failure stress of the surrounding rock-backfill contact surface can be obtained by obtaining the three-dimensional point cloud data of the surrounding rock-backfill contact surface without conducting complex shear failure experiments.

[0045] Based on the same technical concept, the embodiment of the present application also provides a device for generating a surrounding rock-filling body sample, the device comprising: The first acquisition module is used to obtain the lithological characteristics of the surrounding rock at the test site, the raw material ratio of the filling body, and the first three-dimensional point cloud data of the contact surface between the surrounding rock and the filling body; wherein the first three-dimensional point cloud data is obtained by three-dimensionally scanning the contact surface between the surrounding rock and the filling body at the test site in the actual mining site of the mine using a three-dimensional laser scanner; A processing module, used for performing regular gridding processing on the first three-dimensional point cloud data to obtain regularized second three-dimensional point cloud data; a printing module, used for inputting the second three-dimensional point cloud data into a 3D printing device, so that the 3D printing device prints out a surrounding rock specimen based on the second three-dimensional point cloud data and a printing material pre-placed in the 3D printing device; wherein the printing material is determined according to the lithological characteristics, and the target surface of the surrounding rock specimen is a simulated contact surface of the surrounding rock-filling body contact surface; A pouring module is used to pour the pre-generated filling slurry into the mold after the surrounding rock specimen is placed in the mold, so that the filling slurry is in complete contact with the target surface of the surrounding rock specimen, and after the filling slurry poured into the mold solidifies and takes shape, a surrounding rock-filling body sample is obtained; wherein the filling slurry is prepared according to the raw material ratio of the filling body.

[0046] Optionally, after the surrounding rock specimen is placed in the mold, the pouring module pours the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen, and after the filling slurry poured into the mold solidifies and forms, a surrounding rock-filling body sample is obtained, which is specifically used to: After placing the surrounding rock specimen in the mold, pouring the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen; The mold is placed in a curing environment, and the temperature and / or humidity of the curing environment is adjusted to obtain a simulated environment of an actual mine site, so that the filling slurry poured into the mold solidifies and forms in the simulated environment of an actual mine site to obtain a surrounding rock-filling body sample.

[0047] Optionally, the shapes of the other surfaces of the surrounding rock specimen except the target surface are matched with the bottom surface and the side surface of the mold, and the mold is a top-opening mold; The pouring module is used to pour the pre-generated filling slurry into the mold after placing the surrounding rock specimen into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen, specifically for: placing the surrounding rock specimen into the mold with the target surface facing upward; The pre-generated filling slurry is poured into the mold from the top of the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen.

[0048] Optionally, the surrounding rock-backfill body sample is used to perform a shear failure test to obtain a first shear failure stress of the surrounding rock-backfill body contact surface.

[0049] Optionally, the device further comprises: A module is established for establishing a target formula based on the first three-dimensional point cloud data and the shear failure stress corresponding to each of the surrounding rock-backfill body samples; wherein the target formula is used to reflect the changing relationship between the three-dimensional point cloud data of the surrounding rock-backfill body contact surface and the shear failure stress of the surrounding rock-backfill body contact surface.

[0050] Optionally, the device further comprises: The second acquisition module is used to acquire the third three-dimensional point cloud data of the surrounding rock-filling body contact surface at the position to be detected; An input module is used to input the third three-dimensional point cloud data into the target formula and output the second shear failure stress of the surrounding rock-filling body contact surface at the position to be detected.

[0051] Optionally, the shape of the mold is a cylinder or a cuboid.

[0052] Optionally, the lithological characteristics include rock type and rock strength.

[0053] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0054] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0055] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0056] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0057] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0058] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for generating a surrounding rock-filling body sample, characterized in that: include: Obtaining the lithological characteristics of the surrounding rock at the test site, the raw material ratio of the filling body, and the first three-dimensional point cloud data of the contact surface between the surrounding rock and the filling body; wherein the first three-dimensional point cloud data is obtained by three-dimensionally scanning the contact surface between the surrounding rock and the filling body at the test site in the actual mine stope using a three-dimensional laser scanner; Performing regular gridding processing on the first three-dimensional point cloud data to obtain regularized second three-dimensional point cloud data; Inputting the second three-dimensional point cloud data into a 3D printing device, so that the 3D printing device prints a surrounding rock specimen based on the second three-dimensional point cloud data and a printing material pre-placed in the 3D printing device; wherein the printing material is determined according to the lithological characteristics, and the target surface of the surrounding rock specimen is a simulated contact surface of the surrounding rock-filling body contact surface; After the surrounding rock specimen is placed in the mold, the pre-generated filling slurry is poured into the mold so that the filling slurry is in complete contact with the target surface of the surrounding rock specimen. After the filling slurry poured into the mold solidifies and takes shape, a surrounding rock-filling body sample is obtained; wherein the filling slurry is prepared according to the raw material ratio of the filling body.

2. The method according to claim 1, characterized in that: After placing the surrounding rock specimen in the mold, pouring the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen, and after the filling slurry poured into the mold solidifies and forms, a surrounding rock-filling body sample is obtained, including: After placing the surrounding rock specimen in the mold, pouring the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen; The mold is placed in a curing environment, and the temperature and / or humidity of the curing environment is adjusted to obtain a simulated environment of an actual mine site, so that the filling slurry poured into the mold solidifies and forms in the simulated environment of an actual mine site to obtain a surrounding rock-filling body sample.

3. The method according to claim 1 or 2, characterized in that: The shapes of the other surfaces of the surrounding rock specimen except the target surface are mutually adapted to the bottom surface and the side surface of the mold, and the mold is a top-opening mold; After placing the surrounding rock specimen in the mold, pouring the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen, including: placing the surrounding rock specimen into the mold with the target surface facing upward; The pre-generated filling slurry is poured into the mold from the top of the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen.

4. The method according to claim 1, characterized in that: The surrounding rock-filling body sample is used to carry out a shear failure test to obtain the first shear failure stress of the surrounding rock-filling body contact surface.

5. The method according to claim 4, characterized in that: After obtaining a plurality of the surrounding rock-filling body samples and the first shear failure stress corresponding to each of the surrounding rock-filling body samples, the method further includes: A target formula is established based on the first three-dimensional point cloud data and the shear failure stress corresponding to each of the surrounding rock-backfill body samples; wherein the target formula is used to reflect the changing relationship between the three-dimensional point cloud data of the surrounding rock-backfill body contact surface and the shear failure stress of the surrounding rock-backfill body contact surface.

6. The method according to claim 5, characterized in that: After obtaining the target formula, the method further includes: Obtaining the third 3D point cloud data of the surrounding rock-filling body contact surface at the position to be detected; The third three-dimensional point cloud data is input into the target formula, and the second shear failure stress of the surrounding rock-filling body contact surface at the position to be detected is output.

7. The method according to claim 3, characterized in that: The shape of the mold is a cylinder or a cuboid.

8. The method according to claim 1, characterized in that: The lithological characteristics include rock mass type and rock mass strength.

9. A device for generating surrounding rock-filling body samples, characterized in that: include: The first acquisition module is used to obtain the lithological characteristics of the surrounding rock at the test site, the raw material ratio of the filling body, and the first three-dimensional point cloud data of the contact surface between the surrounding rock and the filling body; wherein the first three-dimensional point cloud data is obtained by three-dimensionally scanning the contact surface between the surrounding rock and the filling body at the test site in the actual mining site of the mine using a three-dimensional laser scanner; A processing module, used for performing regular gridding processing on the first three-dimensional point cloud data to obtain regularized second three-dimensional point cloud data; a printing module, used for inputting the second three-dimensional point cloud data into a 3D printing device, so that the 3D printing device prints out a surrounding rock specimen based on the second three-dimensional point cloud data and a printing material pre-placed in the 3D printing device; wherein the printing material is determined according to the lithological characteristics, and the target surface of the surrounding rock specimen is a simulated contact surface of the surrounding rock-filling body contact surface; A pouring module is used to pour the pre-generated filling slurry into the mold after the surrounding rock specimen is placed in the mold, so that the filling slurry is in complete contact with the target surface of the surrounding rock specimen, and after the filling slurry poured into the mold solidifies and takes shape, a surrounding rock-filling body sample is obtained; wherein the filling slurry is prepared according to the raw material ratio of the filling body.

10. The device according to claim 9, characterized in that: The pouring module is used to pour the pre-generated filling slurry into the mold after placing the surrounding rock specimen into the mold, so that the filling slurry is in full contact with the target surface of the surrounding rock specimen. After the filling slurry poured into the mold solidifies and forms, a surrounding rock-filling body sample is obtained. Specifically, it is used to: After placing the surrounding rock specimen in the mold, pouring the pre-generated filling slurry into the mold so that the filling slurry is in full contact with the target surface of the surrounding rock specimen; The mold is placed in a curing environment, and the temperature and / or humidity of the curing environment is adjusted to obtain a simulated environment of an actual mine site, so that the filling slurry poured into the mold solidifies and forms in the simulated environment of an actual mine site to obtain a surrounding rock-filling body sample.

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