CN115758671B - Surrounding rock roadway reinforcement anchor grouting support full life cycle management method, system and application - Google Patents
Surrounding rock roadway reinforcement anchor grouting support full life cycle management method, system and application Download PDFInfo
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Abstract
The invention belongs to the technical field of roadway support data processing, and discloses a surrounding rock roadway reinforcement anchor injection support full life cycle management method, a system and application. The method comprises the following steps: screening on-site construction process parameters in the whole process of the anchor injection support to obtain an on-site construction process capable of meeting the working face propulsion condition; monitoring and analyzing the deformation of the top plate and the stress change of the anchor cable in the working face pushing process by adopting an anchor injection supporting full life cycle and risk hidden danger prediction platform; and according to the data of monitoring analysis, carrying out full life cycle management and risk hidden danger prediction of the anchor injection support. The invention realizes the full life cycle management of the roadway surrounding rock anchor grouting support, can timely acquire, sort and analyze various field monitoring data, extracts valuable information for roadway support effect evaluation, combines with field engineering practice, adjusts the field support scheme in real time, and achieves the technical aims of technical feasibility, safety, reliability and economical rationality.
Description
Technical Field
The invention belongs to the technical field of roadway support data processing, and particularly relates to a method, a system and application for managing the full life cycle of surrounding rock roadway reinforcement anchor grouting support.
Background
In recent years, along with the increasing range and breadth of coal resource exploitation, the control difficulty of roadway surrounding rock is increased continuously due to complex geological conditions and high ground stress environments, and two traditional support methods are adopted, namely, one single beam and three columns are supported, namely, three single hydraulic supports below a root-matched beam are supported, and the other advanced hydraulic supports are supported. The front support mode is mainly based on passive support such as single hydraulic support matched with hinged top beams, advanced hydraulic supports and the like. But the single hydraulic prop has high labor intensity and low safety, and is especially poor in applicability to large mining height working surfaces of thick coal seams; the mechanized operation line mainly comprising the self-moving type advanced hydraulic support greatly improves the advanced support efficiency and safety, is popularized and applied in China, but also has the problems of anchor bolt support failure and roof breakage caused by repeated support of the roof. Along with the continuous progress of scientific technology, the coal roadway support mode gradually develops from passive support modes such as section steel support, contractible support and the like to active support modes such as pure anchor bolt support, anchor net support, anchor bolt and anchor rope combined support and the like, a great deal of research results are obtained, and a lot of precious experience is accumulated in engineering practice. However, there is still a certain gap in the full life cycle management of the support system.
In the prior art, china patent document CN202991134U, publication date 2013, 06 and 12, discloses a roadway support structure support stability prediction system, which can automatically estimate the approximate effective support period of the support structure according to the support time and the real-time support monitoring result, thereby greatly improving the support stability of the roadway support structure; chinese patent document CN112343099A, publication day 2021, 02 and 09 disclose a foundation pit support monitoring system and method, which can monitor foundation pit support in real time so as to improve effective prevention of foundation pit support. The Chinese patent document CN2019109180746, 12 months and 20 days of publication 2019 discloses a supporting method based on the full life cycle of a stoping roadway, and the method effectively solves the problems of low efficiency, complex operation and high labor intensity of the traditional roadway supporting method by designing a grouting supporting process from the tunneling period of the roadway to the completion of stoping of a working face; the Chinese patent document CN2022100001988, publication day 2022, 04 and 08 discloses a hydraulic support full life cycle evaluation method, which comprises defining different evaluation indexes by adopting an AHP method, establishing an evaluation model to obtain a comprehensive evaluation result of the hydraulic support full life cycle, and finally realizing the hydraulic support full life cycle management.
Through the above analysis, the problems and defects existing in the prior art are as follows:
(1) In the prior art, a supporting stability estimating system of a roadway supporting structure is disclosed in a Chinese patent document CN202991134U, but the system only monitors the supporting state of the roadway and does not provide corresponding reinforcing measures for the supporting state;
CN112343099a discloses a foundation pit support monitoring system and method, but the method only monitors the foundation pit support in real time, and does not design and improve the support construction process. The Chinese patent document CN2019109180746 discloses a supporting method based on the full life cycle of a stoping roadway, but the method only designs supporting technology and process, can not effectively evaluate the effect of each step in the process implementation process, is deficient in the aspect of full life cycle management, and has lower accuracy of obtaining data information.
(2) The prior art Chinese patent document CN2022100001988 discloses a full life cycle evaluation method of a hydraulic support, but in the method, the selection of evaluation indexes has certain randomness and has certain influence on the evaluation result, and meanwhile, the hydraulic support is a better support mode, but has higher cost, less practical application and weak actual guidance effect on the site.
Disclosure of Invention
In order to overcome the problems in the related art, the disclosed embodiments of the invention provide a method, a system and an application for managing the full life cycle of surrounding rock roadway reinforced anchor grouting support. The system and the method are used for carrying out relevant analysis on the whole life cycle management of the anchor injection support from the aspects of a design system, a construction system, a monitoring evaluation system and the like, timely collecting, arranging and analyzing various monitoring data on site, extracting valuable information for evaluating the roadway support effect, combining the valuable information with the site engineering practice and adjusting the site support scheme in real time, thereby achieving the technical purposes of feasibility, safety, reliability and economy.
The technical scheme is as follows: the surrounding rock roadway reinforced anchor grouting support full life cycle management method comprises the following steps:
s1, screening field construction process parameters in the whole anchor injection supporting process to obtain a field construction process capable of meeting the working face propulsion condition;
s2, monitoring and analyzing deformation of a top plate and stress change of an anchor rope in the working face pushing process by adopting an anchor injection supporting full life cycle and risk hidden danger prediction platform based on the acquired construction process;
and S3, carrying out anchor injection support full life cycle management and risk hidden danger prediction according to the data of monitoring analysis.
In one embodiment, in step S1, screening the field construction process parameters during the whole process of the anchor injection support includes: and determining the supporting materials, the supporting parameters and the grouting parameters according to actual engineering conditions.
In one embodiment, the support material determination comprises the steps of:
(1) Sampling on site to obtain a coal rock sample, and analyzing rock physical mechanical parameters and mineral components through uniaxial/triaxial compression, uniaxial stretching and XRD indoor tests;
(2) The method comprises the steps of actually and preliminarily determining related supporting materials including anchor rods/ropes, grouting materials, grouting pipes and shape structures of grouting plugs according to coal-rock properties and extremely-close coal seam spacing sites;
(3) And (5) carrying out comparative analysis on different types of grouting materials to determine the optimal supporting material.
In one embodiment, the support parameter determination comprises the steps of:
1) According to specific geological conditions of the working face, a three-dimensional geological numerical calculation model of finite element software is established, and related petrophysical mechanical parameters are obtained through an indoor test; meanwhile, a boundary condition of a numerical calculation model is given, wherein the boundary at the bottom of the numerical calculation model is fixed, the top of the numerical calculation model is a free boundary, vertical load is applied, the size of the vertical load is determined according to the actual burial depth of the upper boundary of the numerical calculation model, and horizontal displacement constraint is applied to the other surfaces;
2) Based on engineering practice, by using the numerical calculation model in the step 1), different simulation schemes are set for the distance between anchor rods and cables, the row distance and the grouting sequence to carry out comparison analysis, and the plastic region, the stress and displacement cloud picture, the stress change of anchor cables and the like of the surrounding rock of the roadway in the working face advancing process are analyzed, so that the optimal support parameters are finally determined.
In one embodiment, the grouting parameter determination specifically includes the following steps:
(i) According to specific geological conditions of the working face, a multi-physical field coupling numerical calculation model is established;
(ii) Setting different schemes for grouting pressure and time respectively for simulation comparison analysis, and determining the optimal grouting pressure and time by analyzing the size of the slurry diffusion radius and the diffusion rate;
(iii) In combination with engineering practice, in the coal layer at the position of the roadway bottom plate with the distance of 1.2-1.5 m, using a drilling machine to test the coal powder quantity at different distances, analyzing the coal powder quantity statistical curves in the same drilling depth of different distances for drilling, and simultaneously, determining the optimal grouting reinforcement time by combining the working face propulsion speed, the grouting construction convenience and the grouting solidification time factors.
In one embodiment, in step S1, obtaining a field construction process capable of satisfying a face advancement condition includes:
(a) Selecting a section of roadway in the working face leading section as a test section, and detecting the thickness of a top plate of the roadway to determine whether the field construction condition of the anchor injection supporting system is met;
(b) Detecting whether drainage of the anchor cable, grouting materials, necessary tool materials for related construction and construction environments meets construction conditions or not;
(c) The construction process is simultaneously managed and supervised in the construction process by sequentially carrying out on-site grouting construction through the operations of positioning grouting anchor rope hole positions, drilling grouting anchor rope holes, installing grouting anchor ropes and sealing holes.
In one embodiment, in step S2, the monitoring and analyzing the deformation of the top plate and the stress variation of the anchor cable in the working surface advancing process by the anchor injection support full life cycle and risk hidden danger predicting platform includes:
utilizing a coal mine overburden movement simulation system to establish a three-dimensional geological digital model of the fully-mechanized mining face, and according to the mining pressure research result of the fully-mechanized mining face, realizing on-site propulsion of the fully-mechanized mining face and synchronous deduction of a computer model on the three-dimensional geological digital model, and simulating the movement rule of an overburden rock layer in a goaf of the fully-mechanized mining face and the movement rule of the overburden rock layer during stoping of an unadopted area of the fully-mechanized mining face;
real-time monitoring and analyzing grouting quantity and grouting pressure grouting data by using an anchor grouting support fine numerical simulation sub-platform, and displaying data change conditions in various forms of a chart, a two-dimensional graph and a report;
and monitoring and forecasting the deformation of the roof and the stress of the anchor cable by using a mining roof dynamic monitoring system and a roof dynamic information forecasting system.
Another object of the present invention is to provide a surrounding rock roadway reinforcing anchor grouting support full life cycle management system, comprising:
the construction process parameter screening system is used for screening the field construction process parameters in the whole process of the anchor injection support,
the construction process acquisition system is used for implementing the site construction process capable of meeting the working face propulsion condition and simultaneously carrying out supervision and supervision on the construction process in the construction process;
the anchor injection supporting full life cycle and risk hidden danger prediction platform is used for monitoring and analyzing the deformation of the top plate and the stress change of the anchor rope in the working face pushing process.
It is a further object of the present invention to provide a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform a method of surrounding rock roadway reinforcement anchor support full lifecycle management.
It is another object of the present invention to provide a computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform a method of surrounding rock roadway reinforcement anchor support full lifecycle management.
By combining all the technical schemes, the invention has the advantages and positive effects that:
first, aiming at the technical problems existing in the prior art and the difficulty of solving the problems, the technical problems solved by the technical scheme of the invention to be protected, results and data in the research and development process and the like are closely combined, the technical problems solved by the technical scheme of the invention are analyzed in detail and deeply, and some technical effects with creativity brought after the problems are solved are specifically described as follows:
(1) And determining construction process parameters required in the whole process of the anchor injection support, and obtaining the site construction process capable of meeting the requirement of working face propulsion.
(2) Based on the acquired construction process, monitoring and analyzing grouting pressure, grouting data, roof deformation and anchor cable stress change in the working face advancing process by adopting an anchor grouting support full life cycle and risk hidden danger prediction platform;
(3) And feeding back the site construction condition in time according to the data of monitoring and analyzing, and adjusting according to the engineering practice to perform full life cycle management and risk hidden danger prediction of the anchor injection support.
(4) The invention can realize the design, supervision and evaluation of the whole process of the anchor injection support, namely the whole life cycle management of the anchor injection support; according to the invention, the anchoring and supporting full life cycle management and risk prediction platform is automatically researched and developed by a team, and can realize real-time intelligent monitoring and evaluation on the on-site supporting control effect.
Secondly, the technical proposal is regarded as a whole or from the perspective of products, and the technical proposal to be protected has the technical effects and advantages as follows:
(1) Starting from the whole anchor grouting supporting process of a design system, a construction system, a monitoring evaluation system and the like, each step of the supporting control process is carried out, and the full life cycle management of the anchor grouting supporting of the surrounding rock of the roadway is realized;
(2) The invention can collect, sort and analyze various monitoring data on site in time, extract valuable information for evaluating roadway supporting effect and combine with site engineering practice to adjust the site supporting scheme in real time, thereby achieving the technical purposes of feasibility, safety, reliability and reasonable economy.
Thirdly, as inventive supplementary evidence of the claims of the present invention, it is also reflected in the following important aspects:
(1) The expected benefits and commercial values after the technical scheme of the invention is converted are as follows: compared with the prior art adopting a common single prop for advanced support, the novel anchor injection integrated advanced support provided by the invention can save labor cost of post returning, advanced support and the like by 27 ten thousand yuan; according to a stoping period, namely 8 months, 217.572 ten thousand yuan of material cost of single prop, iron shoes, pad caps and the like are saved, and the economic benefit can be expected to be created by more than 1500 ten thousand yuan after the rest 7 working faces of the No. 9 coal bed are popularized and applied.
(2) According to the invention, through timely acquisition, arrangement and analysis of various field monitoring data, valuable information for roadway support effect evaluation is extracted and combined with field engineering practice, a field support scheme is adjusted in real time, full life cycle management of roadway surrounding rock anchor grouting support is realized, the technical purposes of feasibility in technology, safety, reliability and economy are achieved, and the technical blank in the field is filled.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure;
FIG. 1 is a flowchart of a method for managing a full life cycle of a surrounding rock roadway reinforcement anchor grouting support provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a full life cycle management method for surrounding rock roadway reinforcement anchor injection support provided by an embodiment of the invention;
FIG. 3 is a flow chart of selecting an anchor support material according to an embodiment of the present invention;
FIG. 4 is a flow chart of determining support parameters provided by an embodiment of the present invention;
FIG. 5 is a flowchart of a grouting parameter determination method according to an embodiment of the present invention;
FIG. 6 is a flow chart of a construction process provided by an embodiment of the present invention;
FIG. 7 is a schematic diagram of a full life cycle and risk potential prediction platform for an anchor injection support provided by an embodiment of the present invention;
FIG. 8 is a schematic diagram of a full life cycle management system for surrounding rock roadway reinforcement anchor injection support provided by an embodiment of the invention;
FIG. 9 is a schematic diagram of deformation values of a tunnel roof according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a roof cable stress value provided by an embodiment of the present invention;
in the figure: 1. a construction process parameter screening system; 2. a construction process acquisition system; 3. and an anchor injection supporting full life cycle and risk hidden danger prediction platform.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
1. Explanation of the examples:
as shown in fig. 1, the embodiment of the invention provides a full life cycle management method for surrounding rock roadway reinforced anchor grouting support, which comprises the following steps:
s101, screening field construction process parameters in the whole anchor injection supporting process to obtain a field construction process capable of meeting the working face propulsion condition;
s102, monitoring and analyzing deformation of a top plate and stress change of an anchor rope in the working face advancing process by adopting an anchor injection supporting full life cycle and risk hidden danger predicting platform based on the acquired construction process;
and S103, carrying out anchor injection support full life cycle management and risk hidden danger prediction according to the data of monitoring analysis.
In a preferred embodiment, in step S101, screening the field construction process parameters during the whole process of the anchor injection support includes: and determining the supporting materials, the supporting parameters and the grouting parameters according to actual engineering conditions.
Example 1
As shown in fig. 2, the method for managing the full life cycle of the surrounding rock roadway reinforced anchor grouting support provided by the embodiment of the invention comprises the following steps:
step 1, in the aspect of a design system, determining supporting materials, supporting parameters and grouting parameters according to actual engineering conditions;
step 2, in the aspect of a construction system, ensuring that a design effect is achieved through construction process design and on-site construction supervision;
and 3, in the aspect of monitoring an evaluation system, monitoring and evaluating the condition after site construction, and monitoring and evaluating the implementation effect in real time.
Example 2
Based on the method for managing the full life cycle of the surrounding rock roadway reinforcement anchor grouting support provided in embodiment 1, further preferably, the step 1 includes three steps of determining a support material, a support parameter and a grouting parameter:
step 1.1, determining supporting materials:
the supporting materials commonly used in coal mines comprise anchor ropes, anchor rods, grouting pipes and the like, and are matched with reinforcing materials to improve supporting performance, and the supporting materials mainly comprise cement additives, solid-safe grouting materials, solid-safe AB rapid hardening materials and the like, but no suitable technical scheme is adopted for selecting the supporting materials at present. The invention provides a complete and effective support material selection method by combining the indoor test result with the field reality, as shown in figure 3.
The method specifically comprises the following steps: firstly, sampling on site to obtain a coal rock sample, and then analyzing rock physical and mechanical parameters and main mineral components through uniaxial/triaxial compression, uniaxial tension, XRD and other indoor tests to provide a reference for subsequent analysis.
Further, the shape and structure of the related supporting materials such as the anchor rod/rope, grouting materials, grouting pipes, grouting plugs and the like are preliminarily determined according to the properties of the coal and the rock and the actual sites such as the distance between the extremely close coal beds. And finally, carrying out comparative analysis on grouting materials of different types, and finally determining the optimal supporting material.
Illustratively, the support material determination may be further understood as:
1) According to specific geological conditions of the working face, a three-dimensional geological numerical calculation model of finite element software is established, and related petrophysical mechanical parameters are obtained through an indoor test; meanwhile, a boundary condition of a numerical calculation model is given, wherein the boundary at the bottom of the numerical calculation model is fixed, the top of the numerical calculation model is a free boundary, vertical load is applied, the size of the vertical load is determined according to the actual burial depth of the upper boundary of the numerical calculation model, and horizontal displacement constraint is applied to the other surfaces;
2) Based on engineering practice, by using the numerical calculation model in the step 1), different simulation schemes are set for the distance between anchor rods and cables, the row distance and the grouting sequence to carry out comparison analysis, and the plastic region, the stress and displacement cloud picture, the stress change of anchor cables and the like of the surrounding rock of the roadway in the working face advancing process are analyzed, so that the optimal support parameters are finally determined.
Step 1.2, support parameter determination:
the determination of the support parameters is based on the actual departure of the field engineering, and the reasonable determination is carried out on the row spacing between the anchor rods/cables, the grouting sequence and the like. The invention is based on numerical simulation software, and analyzes and determines the anchor rod/cable parameters, as shown in fig. 4, and specifically comprises the following steps:
firstly, a numerical calculation model is established according to specific geological conditions of a working face, and related petrophysical and mechanical parameters are obtained through the indoor test. And meanwhile, given a model boundary condition, the bottom boundary of the model is fixed, the top is a free boundary, vertical load is applied, the vertical load is determined according to the actual burial depth of the upper boundary of the model, and the horizontal displacement constraint is applied to the other surfaces. And finally, based on engineering practice, setting different simulation schemes for the distance between anchor rods and cables, the row distance, the grouting sequence and the like, performing contrast analysis, observing the deformation condition of surrounding rocks of a roadway and the change of stress of anchor cables in the process of advancing a working face, and finally determining the optimal support parameters.
Step 1.3, grouting parameter determination:
the selection of grouting parameters directly influences the merits of the penetration and diffusion effects of the slurry in the surrounding rock, so that the parameters such as grouting pressure, time and opportunity in the grouting construction technology are reasonably determined, and the method has very important significance. In the novel anchor grouting advanced support system, three grouting parameters of grouting pressure, grouting time and time are mainly analyzed and determined, as shown in fig. 5, and the method for combining field actual experience and numerical simulation software is mainly adopted for grouting pressure and grouting time and specifically comprises the following steps:
(i) According to specific geological conditions of the working face, a multi-physical field coupling numerical calculation model is established;
(ii) Setting different schemes for grouting pressure and time respectively for simulation comparison analysis, and determining the optimal grouting pressure and time by analyzing the size of the slurry diffusion radius and the diffusion rate;
(iii) In combination with engineering practice, in the coal layer at the position of the roadway bottom plate with the distance of 1.2m-1.5m, using a drilling machine to test the coal powder quantity at different distances, analyzing the coal powder quantity statistical curves in the same drilling depth of different distances for drilling, and simultaneously, determining the optimal grouting reinforcement time by combining the working face propulsion speed, grouting construction convenience and grouting solidification time factors.
Example 3
Based on the surrounding rock roadway reinforcement anchor grouting support full life cycle management method provided in embodiment 1, step 2 specifically includes:
the design of the construction process is actually carried out based on field engineering, and specific steps are shown in fig. 6, when the field construction is carried out, firstly, a section of roadway in the working face leading section is selected as a test section, and meanwhile, the thickness of a top plate of the roadway is probed to determine whether the field construction condition of the anchor injection support system is met. Secondly, construction preparation work is needed to be done, namely, the anchor cable and grouting materials are checked, so that construction problems caused by material damage are avoided, meanwhile, necessary tool materials for relevant construction are checked, drainage problems of construction environments are checked, and safety accidents are prevented. And finally, performing site grouting construction sequentially through the operations of positioning grouting anchor rope hole positions, drilling grouting anchor rope holes, installing grouting anchor ropes, sealing holes and the like, and simultaneously performing supervision and supervision on the construction process in the construction process to ensure the construction effect.
Example 4
The method for managing the whole life cycle of the surrounding rock roadway reinforcement anchor grouting support provided by the embodiment 1 specifically comprises the following steps:
the intelligent monitoring and evaluation mainly comprises two aspects, namely, the monitoring and evaluation of the condition of field construction is carried out, and the monitoring of the field implementation effect in the working face propelling process is carried out. The monitoring method mainly carries out intelligent monitoring and evaluation through an anchor injection support full life cycle management and risk hidden danger prediction platform, as shown in fig. 7, and specifically comprises the following steps:
in the aspect of intelligent monitoring and evaluation, a coal mine overburden movement simulation system, an anchor injection support fine numerical simulation sub-platform, a mining roof dynamic monitoring system, a roof dynamic information prediction system and the like are mainly adopted to monitor and analyze roof deformation, anchor rope stress change and the like in the construction process and the working face propelling process, and the used monitoring equipment mainly relates to a roof separation instrument and an anchor rope dynamometer. The coal mine overburden movement simulation system can establish a fully-mechanized mining face three-dimensional geological digital model, and according to the mining pressure research result of the fully-mechanized mining face, on-site propulsion of the fully-mechanized mining face and synchronous deduction of a computer model are realized on the three-dimensional geological digital model, and the movement rule of the overburden rock layer in the goaf of the fully-mechanized mining face and the movement rule of the overburden rock layer in the stope of the non-mining area of the fully-mechanized mining face are simulated. The anchor grouting support fine numerical simulation sub-platform can monitor and analyze grouting data such as grouting quantity, grouting pressure and the like in real time, and display data change conditions in various forms such as charts, two-dimensional graphs, reports and the like. The mining roof dynamic monitoring system and the roof dynamic information prediction system can monitor and forecast roof deformation and anchor cable stress. And the full life cycle management and risk hidden danger prediction of the anchor injection support are effectively realized.
Example 5
As shown in fig. 8, an embodiment of the present invention provides a full life cycle management system for surrounding rock roadway reinforcement anchor grouting support, including:
the construction process parameter screening system 1 is used for screening the field construction process parameters in the whole process of the anchor injection support,
the construction process acquisition system 2 is used for implementing the site construction process capable of meeting the working face propulsion condition and simultaneously managing and supervising the construction process in the construction process;
the anchor injection supporting full life cycle and risk hidden danger prediction platform 3 is used for monitoring and analyzing the deformation of the top plate and the stress change of the anchor rope in the working face pushing process.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
The content of the information interaction and the execution process between the devices/units and the like is based on the same conception as the method embodiment of the present invention, and specific functions and technical effects brought by the content can be referred to in the method embodiment section, and will not be described herein.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, the specific names of the functional units and modules are only for distinguishing from each other, and are not used for limiting the protection scope of the present invention. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
2. Application examples:
the embodiment of the invention also provides a computer device, which comprises: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, which when executed by the processor performs the steps of any of the various method embodiments described above.
Embodiments of the present invention also provide a computer readable storage medium storing a computer program which, when executed by a processor, performs the steps of the respective method embodiments described above.
The embodiment of the invention also provides an information data processing terminal, which is used for providing a user input interface to implement the steps in the method embodiments when being implemented on an electronic device, and the information data processing terminal is not limited to a mobile phone, a computer and a switch.
The embodiment of the invention also provides a server, which is used for realizing the steps in the method embodiments when being executed on the electronic device and providing a user input interface.
Embodiments of the present invention provide a computer program product which, when run on an electronic device, causes the electronic device to perform the steps of the method embodiments described above.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiments, and may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing apparatus/terminal device, recording medium, computer memory, read-only memory (ROM), random access memory (RandomAccessMemory, RAM), electrical carrier signal, telecommunication signal, and software distribution medium. Such as a U-disk, removable hard disk, magnetic or optical disk, etc.
3. Evidence of example related effects:
by adopting the technical method disclosed by the invention, the on-site implementation effect analysis is carried out on the stoping roadway of the working face of the Dongqu coal mine 29204, and the roadway length of 570m-670m is selected as a test area. The concrete monitoring results are shown in fig. 9 and 10, and are respectively the roadway roof deformation value and the roof anchor cable stress value. It can be seen that when the roadway length is 570m-600m, roadway surrounding rock deformation and anchor cable stress are stable, and the supporting effect is good, but the roadway deformation is suddenly and fast between 600m-610m, the anchor cable stress suddenly increases, and the early warning value set by a mining party is exceeded, so that the original supporting scheme can not effectively control the roadway surrounding rock deformation. The field analysis shows that the roadway surrounding rock in the area is broken, and belongs to a surrounding rock breaking area, so that the supporting scheme needs to be adjusted. The original supporting scheme is analyzed and predicted by combining the full life cycle and risk hidden danger prediction platform of the anchor grouting support, the row distance of the anchor cable is changed into 1000mm, and a grouting mode of each row in sequence is adopted.
After the original supporting scheme is optimized, as can be seen from fig. 9 and 10, the deformation of the roadway is rapidly reduced, and the stress value of the anchor cable is reduced below the early warning value and is stable. Along with the continuous pushing of the working face, the roadway roof is found to be basically free from sinking in the range of 630m-640m, and the suspended roof larger than 5m appears after the working face is pushed and picked, so that the safety production of the working face is affected. The field analysis shows that the roadway surrounding rock in the area belongs to a high-stress area, so that the supporting scheme needs to be properly adjusted. And analyzing and predicting the supporting scheme by combining the full life cycle and risk hidden danger prediction platform of the anchor grouting support, and changing the grouting sequence into a mode of sequentially and intermittently grouting.
After the supporting scheme is optimized, as can be seen from fig. 9 and 10, the roadway deformation is slightly increased, but the roadway deformation finally tends to be stable, the stress value of the anchor cable also shows the same trend, and the final values of the roadway deformation and the anchor cable also meet the requirement of safe production of the working face.
Compared with the original supporting scheme, the overall field implementation shows that the maximum sinking amount of the top plate is reduced by 73.48 percent compared with the original supporting scheme, the stress maximum value of the anchor cable is reduced by 50.68 percent, and the supporting effect is obviously improved.
While the invention has been described with respect to what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (8)
1. The full life cycle management method for the surrounding rock roadway reinforcement anchor grouting support is characterized by comprising the following steps of:
s1, screening field construction process parameters in the whole anchor injection supporting process to obtain a field construction process capable of meeting the working face propulsion condition;
s2, monitoring and analyzing deformation of a top plate and stress change of an anchor rope in the working face pushing process by adopting an anchor injection supporting full life cycle and risk hidden danger prediction platform based on the acquired construction process;
s3, carrying out anchor injection support full life cycle management and risk hidden danger prediction according to the data of monitoring analysis;
in step S1, the obtaining a site operation process capable of satisfying the working face advancing condition includes:
(a) Selecting a section of roadway in the working face leading section as a test section, and detecting the thickness of a top plate of the roadway to determine whether the field construction condition of the anchor injection supporting system is met;
(b) Detecting whether drainage of the anchor cable, grouting materials, necessary tool materials for related construction and construction environments meets construction conditions or not;
(c) Sequentially performing on-site grouting construction by positioning grouting anchor cable eyes, drilling grouting anchor cable holes, installing grouting anchor cables and sealing holes, and simultaneously performing supervision and supervision on the construction process in the construction process;
in step S2, the monitoring and analyzing of the deformation of the top plate and the stress variation of the anchor cable in the working face pushing process by the anchor injection support full life cycle and risk hidden danger prediction platform includes:
utilizing a coal mine overburden movement simulation system to establish a three-dimensional geological digital model of the fully-mechanized mining face, and according to the mining pressure research result of the fully-mechanized mining face, realizing on-site propulsion of the fully-mechanized mining face and synchronous deduction of a computer model on the three-dimensional geological digital model, and simulating the movement rule of an overburden rock layer in a goaf of the fully-mechanized mining face and the movement rule of the overburden rock layer during stoping of an unadopted area of the fully-mechanized mining face;
real-time monitoring and analyzing grouting quantity and grouting pressure grouting data by using an anchor grouting support fine numerical simulation sub-platform, and displaying data change conditions in various forms of a chart, a two-dimensional graph and a report;
and monitoring and forecasting the deformation of the roof and the stress of the anchor cable by using a mining roof dynamic monitoring system and a roof dynamic information forecasting system.
2. The method for managing the whole life cycle of the surrounding rock roadway reinforced anchor grouting support according to claim 1, wherein in step S1, screening the field construction process parameters in the whole process of the anchor grouting support comprises: and determining the supporting materials, the supporting parameters and the grouting parameters according to actual engineering conditions.
3. The method for managing the full life cycle of surrounding rock roadway reinforcement anchor grouting support according to claim 2, wherein the support material determination comprises the following steps:
(1) Sampling on site to obtain a coal rock sample, and analyzing rock physical mechanical parameters and mineral components through uniaxial/triaxial compression, uniaxial stretching and XRD indoor tests;
(2) The method comprises the steps of actually and preliminarily determining supporting materials including anchor rods/ropes, grouting materials, grouting pipes and shape structures of grouting plugs according to coal-rock properties and extremely-close coal seam spacing sites;
(3) And (5) carrying out comparative analysis on different types of grouting materials to determine the optimal supporting material.
4. The method for managing the full life cycle of surrounding rock roadway reinforcement anchor grouting support according to claim 2, wherein the support parameter determination comprises the following steps:
i, establishing a finite element software three-dimensional geological numerical calculation model according to specific geological conditions of a working face, and obtaining relevant petrophysical mechanical parameters through an indoor test; meanwhile, a boundary condition of a numerical calculation model is given, wherein the boundary at the bottom of the numerical calculation model is fixed, the top of the numerical calculation model is a free boundary, vertical load is applied, the size of the vertical load is determined according to the actual burial depth of the upper boundary of the numerical calculation model, and horizontal displacement constraint is applied to the other surfaces;
and II, based on engineering practice, setting different simulation schemes for the distance between anchor rods and cable, the row distance and the grouting sequence by using the numerical calculation model in the step I to carry out comparison analysis, analyzing the plastic region of the roadway surrounding rock, the stress and displacement cloud picture and the stress change of the anchor cable in the working face advancing process, and finally determining the optimal supporting parameters.
5. The method for managing the full life cycle of the surrounding rock roadway reinforcement anchor grouting support according to claim 2, wherein the grouting parameter determination specifically comprises the following steps:
(i) According to specific geological conditions of the working face, a multi-physical field coupling numerical calculation model is established;
(ii) Setting different schemes for grouting pressure and time respectively for simulation comparison analysis, and determining the optimal grouting pressure and time by analyzing the size of the slurry diffusion radius and the diffusion rate;
(iii) In combination with engineering practice, in the coal layer at the position of the roadway bottom plate with the distance of 1.2m-1.5m, using a drilling machine to test the coal powder quantity at different distances, analyzing the coal powder quantity statistical curves in the same drilling depth of different distances for drilling, and simultaneously, determining the optimal grouting reinforcement time by combining the working face propulsion speed, grouting construction convenience and grouting solidification time factors.
6. A system for implementing the method for managing the full life cycle of the surrounding rock roadway reinforcement anchor support according to any one of claims 1 to 5, the system comprising:
a construction process parameter screening system (1) for screening the field construction process parameters in the whole process of the anchor injection support,
the construction process acquisition system (2) is used for implementing the site construction process capable of meeting the working face propulsion condition and simultaneously supervising and managing the construction process in the construction process;
the anchor injection supporting full life cycle and risk hidden danger prediction platform (3) is used for monitoring and analyzing the deformation of the top plate and the stress change of the anchor rope in the working face pushing process.
7. A computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the method of full lifecycle management for surrounding rock roadway reinforcement anchor braces of any one of claims 1-5.
8. A computer readable storage medium storing a computer program, wherein the computer program, when executed by a processor, causes the processor to perform the method of full life cycle management of a surrounding rock roadway reinforcement anchor support of any one of claims 1-5.
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| CN101968825A (en) * | 2010-11-23 | 2011-02-09 | 中国矿业大学 | Method for intelligently designing bolting of coal mine tunnels |
| CN110792450A (en) * | 2019-09-26 | 2020-02-14 | 中国矿业大学 | Method for determining advanced support of grouting anchor cable |
| CN113622913A (en) * | 2021-08-20 | 2021-11-09 | 中国矿业大学 | Deformation control method for mining tunnel surrounding rock integrated with underground and up-down tunnel by full-caving method |
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| CN101968825A (en) * | 2010-11-23 | 2011-02-09 | 中国矿业大学 | Method for intelligently designing bolting of coal mine tunnels |
| CN110792450A (en) * | 2019-09-26 | 2020-02-14 | 中国矿业大学 | Method for determining advanced support of grouting anchor cable |
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