A dry ash pneumatic delamination injection method and system
The dry ash pneumatic delamination injection method solves the problems of water consumption and pollution in hydraulic delamination grouting by using pneumatic control parameters and a gas-solid two-phase flow dynamics model. It achieves efficient solid waste disposal and surface subsidence control, and is suitable for mining areas with high requirements for water conservation and environmental protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUAIBEI MINING GRP EXPLORATION ENG
- Filing Date
- 2026-01-28
- Publication Date
- 2026-05-29
AI Technical Summary
Existing hydraulic delamination grouting technology consumes a large amount of water, resulting in groundwater pollution from oozing water and low solid waste disposal efficiency.
The dry ash pneumatic delamination injection method is adopted. The conveying of compressed air and dry fly ash mixture is controlled by pneumatic injection control parameters to form a gas-solid two-phase flow, which is directly injected into the delamination space. The injection control model is trained by using the gas-solid two-phase flow dynamic equation to realize dry ash pneumatic delamination injection.
It requires no water, avoids slurry leakage pollution, improves solid waste disposal efficiency, provides immediate and continuous support, and precisely controls surface subsidence, demonstrating significant environmental advantages.
Smart Images
Figure CN122106664A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of rock mining and geotechnical engineering technology, specifically a dry ash pneumatic delamination injection method and system. Background Technology
[0002] With the deepening development of green mining concepts, using grouting and filling technology to control rock strata movement and surface subsidence, and to co-dispose of industrial solid waste (such as fly ash and coal gangue), has become an important technological direction for mines, especially in the coal mining sector. Currently, the most widely used and relatively mature method in this field is hydraulic delamination grouting technology. This method uses compressed air as power to directly transport dry solid waste powder material through boreholes to the target delamination space, thereby achieving rock strata support, surface subsidence control, and solid waste disposal.
[0003] However, existing technologies suffer from problems such as high water consumption, groundwater pollution from effluent, and low efficiency in solid waste disposal. Summary of the Invention
[0004] To address the shortcomings mentioned in the background section, the present invention aims to provide a dry ash pneumatic delamination injection method and system.
[0005] Firstly, the objective of this invention can be achieved through the following technical solution: a dry ash pneumatic delamination injection method, the method comprising the following steps: Receive target delamination parameters and dry fly ash parameters, wherein the target delamination parameters include delamination depth and delamination space volume, and the dry fly ash material parameters include material particle size distribution and material moisture content; The target delamination parameters and dry fly ash parameters are input into a pre-established injection control model, and the pneumatic injection control parameters are output. The dry ash pneumatic delamination injection operation is performed based on the pneumatic injection control parameters. The pneumatic injection control parameters include the compressed air delivery pressure, gas flow rate, and ash injection volume.
[0006] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the operation process of the dry ash pneumatic delamination injection operation, including: The air compressor is controlled to inject compressed air into the delivery tank according to the delivery pressure and flow rate of compressed air; The control tank mixes dry fly ash with compressed air according to the ash injection amount to form a gas-solid two-phase flow. The gas-solid two-phase flow is controlled and transported through the delivery pipeline to the target separation space, and the filling is completed.
[0007] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the pre-established injection control model is obtained by training based on the gas-solid two-phase flow dynamics equations and the input historical target delamination parameters and dry fly ash parameters.
[0008] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: a processing procedure for the pre-established injection control model, as follows: Mark the target delamination parameters and dry fly ash parameters: The delamination depth within the target delamination parameters is denoted as H, and the spatial volume is denoted as V; The measured temperature in the parameters of dry fly ash is marked as W, and the particle size distribution of the material is marked as D. The injection control process is calculated based on the target delamination parameters after marking and the dry fly ash parameters, using the following formula: In the formula, Q is the pneumatic injection control parameter, k1 and k2 are both preset proportional coefficients, α is the delamination correction parameter, β is the control correction parameter, T is the preset injection time, and D0 is the average particle size distribution of the material.
[0009] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the process of obtaining the target delamination parameter, comprising: Based on the geological exploration report of the mining area, coal seam mining design drawings and rock strata columnar section, the stratigraphic position, burial depth and lithology, thickness and mechanical properties of the target delamination layer are determined, and the delamination depth and spatial volume are extracted as target delamination parameters.
[0010] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the process of obtaining the parameters of the dried fly ash, comprising: The measured humidity was determined using an infrared humidity meter, the particle size distribution of the material was measured using a laser particle size analyzer, and the bulk density and angle of repose were determined through standard physical experiments. The measured humidity and particle size distribution of the material were used as parameters for drying fly ash.
[0011] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: when the material humidity within the dry fly ash material parameters is less than or equal to a preset material humidity threshold, the requirements for pneumatic conveying are met; otherwise, subsequent pneumatic conveying cannot be carried out.
[0012] Secondly, in order to achieve the above objectives, the present invention discloses a dry ash pneumatic delamination injection system, comprising: The data receiving module is used to receive target delamination parameters and dry fly ash parameters, wherein the target delamination parameters include delamination depth and delamination space volume, and the dry fly ash material parameters include material particle size distribution and material moisture content; The pneumatic injection module is used to input the target delamination parameters and dry fly ash parameters into a pre-established injection control model, output pneumatic injection control parameters, and perform dry ash pneumatic delamination injection operation based on the pneumatic injection control parameters; wherein, the pneumatic injection control parameters include the compressed air delivery pressure, gas flow rate, and ash injection volume.
[0013] In another aspect of the present invention, in order to achieve the above-mentioned objective, a terminal device is disclosed, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. The memory stores the computer program capable of running on the processor, and when the processor loads and executes the computer program, it employs a dry ash pneumatic delamination injection method as described above.
[0014] In another aspect of the present invention, in order to achieve the above-mentioned objective, a computer-readable storage medium is disclosed, wherein a computer program is stored in the computer program, and when the computer program is loaded and executed by a processor, a dry ash pneumatic delamination injection method as described above is employed.
[0015] The beneficial effects of this invention are: This invention eliminates the need for water throughout the entire process, completely solving the problem of traditional grouting in water-scarce mining areas or regions with severe winters. The absence of water fundamentally prevents grout leakage from polluting groundwater or causing secondary disasters. It can process more fly ash and coal gangue powder per unit time, resulting in high solid waste disposal efficiency. After the dry ash is compacted within the delamination layer, it provides immediate and continuous support, effectively inhibiting further deformation of the overlying rock strata, thereby precisely controlling surface subsidence, achieving significant environmental advantages in solid waste disposal. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the method flow of the present invention; Figure 2 This is a schematic diagram of the system structure of the present invention. Detailed Implementation
[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] Example 1: like Figure 1 As shown, a dry ash pneumatic delamination injection method includes the following steps: S101: Receive target delamination parameters and dry fly ash parameters, wherein the target delamination parameters include delamination depth and delamination space volume, and the dry fly ash material parameters include material particle size distribution and material moisture content; The process of obtaining the target delamination parameter includes: Based on the geological exploration report of the mining area, coal seam mining design drawings and rock strata columnar section, the stratigraphic position, burial depth and lithology, thickness and mechanical properties of the target delamination layer are determined, and the delamination depth and spatial volume are extracted as target delamination parameters.
[0019] The process of obtaining the parameters of the dried fly ash includes: The measured humidity was determined using an infrared humidity meter, the particle size distribution of the material was measured using a laser particle size analyzer, and the bulk density and angle of repose were determined through standard physical experiments. The measured humidity and particle size distribution of the material were used as parameters for drying fly ash.
[0020] When the material moisture content of the dry fly ash material is less than or equal to the preset material moisture content threshold, the requirements for pneumatic conveying are met; otherwise, subsequent pneumatic conveying cannot be carried out.
[0021] S102: Input the target delamination parameters and dry fly ash parameters into the pre-established injection control model, output the pneumatic injection control parameters, and perform dry ash pneumatic delamination injection operation based on the pneumatic injection control parameters; wherein, the pneumatic injection control parameters include the compressed air delivery pressure, gas flow rate and ash injection amount.
[0022] The operation process of dry ash pneumatic delamination injection includes: The air compressor is controlled to inject compressed air into the delivery tank according to the delivery pressure and flow rate of compressed air; The control tank mixes dry fly ash with compressed air according to the ash injection amount to form a gas-solid two-phase flow. The gas-solid two-phase flow is controlled and transported through the delivery pipeline to the target separation space, and the filling is completed.
[0023] The pre-established injection control model was trained based on the gas-solid two-phase flow dynamics equations and the input historical target delamination parameters and dry fly ash parameters.
[0024] The processing procedure of the pre-established injection control model is as follows: Mark the target delamination parameters and dry fly ash parameters: The delamination depth within the target delamination parameters is denoted as H, and the spatial volume is denoted as V; The measured temperature in the parameters of dry fly ash is marked as W, and the particle size distribution of the material is marked as D. The injection control process is calculated based on the target delamination parameters after marking and the dry fly ash parameters, using the following formula: In the formula, Q is the pneumatic injection control parameter, k1 and k2 are both preset proportional coefficients, α is the delamination correction parameter, β is the control correction parameter, T is the preset injection time, and D0 is the average particle size distribution of the material.
[0025] The specific delamination correction parameters are obtained by determining the correction ratio based on the influence level of the delamination within the injection control model; The control correction parameters are obtained by determining the correction ratio based on the influence level of the control process within the injected control model; The average particle size distribution is obtained by averaging the particle size distribution values after multiple calculations.
[0026] Specifically, the present invention will be further illustrated below through embodiments: The specific process flow is as follows: The core of dry ash pneumatic injection technology lies in constructing a stable and controllable gas-solid two-phase flow conveying system. The process flow is as follows: 1. Ash source preparation and drying: Ensure that materials such as fly ash and coal gangue powder are sufficiently dry to meet the requirements of pneumatic conveying.
[0027] 2. Pressurization and mixing: Dry fly ash and coal gangue powder are fed into a delivery tank, and compressed air is injected into the tank. The solid and gas are fully mixed to form a state similar to a "fluid".
[0028] 3. Pneumatic conveying and injection: Driven by compressed air, the air-ash mixture is transported through pipelines into the borehole, directly reaching the separation space. Due to the absence of water, the stratum can be selected on the "curved subsidence zone," making it more suitable for shallow coal seam mining.
[0029] Here, air escapes through the cracks in the rock strata (where water is absorbed and purified), and even if it enters the working face, it has no impact. Meanwhile, solid fly ash is trapped, accumulated, and compacted, eventually forming a dense "solid filler" with good support capacity within the delamination layer.
[0030] Dry ash pneumatic delamination injection technology represents a cutting-edge trend in green mining technology, moving towards more water-saving, more efficient, and more thorough solid waste resource utilization. It is particularly suitable for: 1. Coal mines in areas with scarce water resources.
[0031] 2. Mining areas with extremely high environmental protection requirements, where solid waste discharge is not allowed.
[0032] 3. Power plants or large mines that require large-scale, high-efficiency disposal of fly ash and coal gangue.
[0033] The comparison between hydraulic grouting and dry ash pneumatic grouting is shown in Table 1 below. Table 1 Example 2: To achieve the above objective, such as Figure 2 As shown, based on Embodiment 1, this invention discloses a dry ash pneumatic delamination injection system, comprising: The data receiving module 11 is used to receive target delamination parameters and dry fly ash parameters, wherein the target delamination parameters include delamination depth and delamination space volume, and the dry fly ash material parameters include material particle size distribution and material moisture content; The pneumatic injection module 12 is used to input the target delamination parameters and dry fly ash parameters into the pre-established injection control model, output the pneumatic injection control parameters, and perform dry ash pneumatic delamination injection operation based on the pneumatic injection control parameters; wherein, the pneumatic injection control parameters include the compressed air delivery pressure, gas flow rate and ash injection volume.
[0034] Based on the same inventive concept, this invention also provides a computer device, comprising: one or more processors, and a memory for storing one or more computer programs; the programs include program instructions, and the processor executes the program instructions stored in the memory. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, used to implement one or more instructions, specifically for loading and executing one or more instructions stored in a computer storage medium to implement the above-described method.
[0035] It should be further explained that, based on the same inventive concept, the present invention also provides a computer storage medium storing a computer program, which, when executed by a processor, performs the above-described method. This storage medium can be any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In the present invention, the computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.
[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0037] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.
Claims
1. A method for pneumatic delamination injection of dry ash, characterized in that, The method includes the following steps: Receive target delamination parameters and dry fly ash parameters, wherein the target delamination parameters include delamination depth and delamination space volume, and the dry fly ash material parameters include material particle size distribution and material moisture content; The target delamination parameters and dry fly ash parameters are input into a pre-established injection control model, and the pneumatic injection control parameters are output. The dry ash pneumatic delamination injection operation is performed based on the pneumatic injection control parameters. The pneumatic injection control parameters include the compressed air delivery pressure, gas flow rate, and ash injection volume.
2. The dry ash pneumatic delamination injection method according to claim 1, characterized in that, The operation process of the dry ash pneumatic delamination injection includes: The air compressor is controlled to inject compressed air into the delivery tank according to the delivery pressure and flow rate of compressed air; The control tank mixes dry fly ash with compressed air according to the ash injection amount to form a gas-solid two-phase flow. The gas-solid two-phase flow is controlled and transported through the delivery pipeline to the target separation space, and the filling is completed.
3. The dry ash pneumatic delamination injection method according to claim 1, characterized in that, The pre-established injection control model is obtained by training based on the gas-solid two-phase flow dynamics equations and the input historical target delamination parameters and dry fly ash parameters.
4. The dry ash pneumatic delamination injection method according to claim 3, characterized in that, The processing procedure of the pre-established injection control model is as follows: Mark the target delamination parameters and dry fly ash parameters: The delamination depth within the target delamination parameters is denoted as H, and the spatial volume is denoted as V; The measured temperature in the parameters of dry fly ash is marked as W, and the particle size distribution of the material is marked as D. The injection control process is calculated based on the target delamination parameters after marking and the dry fly ash parameters, using the following formula: In the formula, Q is the pneumatic injection control parameter, k1 and k2 are both preset proportional coefficients, α is the delamination correction parameter, and β is the control correction parameter; T is the preset injection time, and D0 is the average particle size distribution of the material.
5. The dry ash pneumatic delamination injection method according to claim 1, characterized in that, The process of obtaining the target delamination parameter includes: Based on the geological exploration report of the mining area, coal seam mining design drawings and rock strata columnar section, the stratigraphic position, burial depth and lithology, thickness and mechanical properties of the target delamination layer are determined, and the delamination depth and spatial volume are extracted as target delamination parameters.
6. The dry ash pneumatic delamination injection method according to claim 1, characterized in that, The process of obtaining the parameters of the dried fly ash includes: The measured humidity was determined using an infrared humidity meter, the particle size distribution of the material was measured using a laser particle size analyzer, and the bulk density and angle of repose were determined through standard physical experiments. The measured humidity and particle size distribution of the material were used as parameters for drying fly ash.
7. The dry ash pneumatic delamination injection method according to claim 6, characterized in that, When the material humidity within the parameters of the dried fly ash is less than or equal to the preset material humidity threshold, the requirements for pneumatic conveying are met; otherwise, subsequent pneumatic conveying cannot be carried out.
8. A dry ash pneumatic delamination injection system, employing the dry ash pneumatic delamination injection method according to any one of claims 1 to 7, characterized in that, include: The data receiving module is used to receive target delamination parameters and dry fly ash parameters, wherein the target delamination parameters include delamination depth and delamination space volume, and the dry fly ash material parameters include material particle size distribution and material moisture content; The pneumatic injection module is used to input the target delamination parameters and dry fly ash parameters into a pre-established injection control model, output pneumatic injection control parameters, and perform dry ash pneumatic delamination injection operation based on the pneumatic injection control parameters; wherein, the pneumatic injection control parameters include the compressed air delivery pressure, gas flow rate, and ash injection volume.
9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that, The memory stores a computer program that can run on a processor. When the processor loads and executes the computer program, it employs a dry ash pneumatic delamination injection method as described in any one of claims 1 to 7.
10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is loaded and executed by the processor, it employs a dry ash pneumatic delamination injection method as described in any one of claims 1 to 7.