A support parameter recursive correction method based on continuous feedback of adjacent anchor rod construction

Abstract

The application discloses a kind of based on the support parameter recursive correction method of adjacent anchor rod construction continuous feedback, comprising: the roadway to be supported region is divided into multiple partitions according to section, and reference anchor rod point and subsequent recursive anchor rod point are set in each partition;The reference anchor rod point is constructed, and the construction feedback data of hole forming stage, installation stage and pre-tightening stage is obtained;According to the construction feedback data, the response characteristics of each anchor rod point are determined, and the response field mode of surrounding rock is identified based on the response change between adjacent anchor rod points;According to the response field mode identified, the support parameters of subsequent recursive anchor rod point are recursively corrected.The support parameter recursive correction method based on adjacent anchor rod construction continuous feedback of the application can obtain the multidimensional response of surrounding rock to anchor rod construction process, realize the recursive correction of support parameters based on adjacent point construction feedback, and effectively solve the problem of surrounding rock state reflection lag and support parameter adjustment not in time.

Description

Technical Field

[0001] This invention relates to the field of coal mine roadway anchor support technology, and in particular to a method for recursive correction of support parameters based on continuous feedback from adjacent anchor construction. Background Technology

[0002] After the excavation of underground roadways in coal mines, the roof, sides, and shoulder areas often exhibit significant heterogeneity and localized weakening due to factors such as coal seam occurrence conditions, the degree of fracturing of the surrounding rock, structural development, and mining disturbances. The stability of the surrounding rock changes rapidly in space. As the most commonly used active support method for coal mine roadways, the construction quality and parameter matching of bolt support directly affect the control effect of the surrounding rock and subsequent safe production.

[0003] Existing technologies typically involve first designing support parameters, then revising the support scheme based on construction monitoring results or surrounding rock deformation; alternatively, during anchor bolt construction, single aspects such as hole quality, installation status, and preload are monitored to determine the current anchor bolt construction quality or support effectiveness. Other technologies evaluate the surrounding rock condition through surrounding rock stability testing, support monitoring, or anchor bolt stress monitoring, and adjust subsequent support parameters accordingly. Overall, these technologies have achieved a certain degree of optimization in support design and control over construction quality.

[0004] However, compared with the needs of on-site construction, existing technologies still have the following problems:

[0005] It focuses more on post-construction monitoring, single-process testing or overall scheme modification, lacks continuous utilization of construction feedback information throughout the entire process of anchor bolt drilling, installation and pre-tightening, and is difficult to reflect the actual response of the surrounding rock in the support implementation process in a timely manner; Existing methods typically isolate hole-forming feedback, installation feedback, and pre-tightening feedback, failing to establish a continuous correction mechanism that transmits the response of preceding anchor bolt construction to subsequent anchor bolt support parameters. This results in delayed adjustment of support parameters and insufficient adaptability in the field. When the surrounding rock conditions in the same area change significantly, existing technologies cannot make zoned, point-by-point, and progressive adjustments based on feedback from adjacent anchor bolt construction, which affects the targeting of support and construction efficiency. Summary of the Invention

[0006] The main objective of this invention is to provide a method for recursive correction of support parameters based on continuous feedback from adjacent anchor bolt construction.

[0007] Another objective of this invention is to propose a recursive correction device for support parameters based on continuous feedback from adjacent anchor bolt construction.

[0008] The third objective of this invention is to provide a computer device.

[0009] A fourth objective of this invention is to provide a non-transitory computer-readable storage medium.

[0010] To achieve the above objectives, a first aspect of the present invention proposes a method for recursive correction of support parameters based on continuous feedback from adjacent anchor bolt construction, comprising: The roadway area to be supported is divided into multiple zones according to the cross-section, and the benchmark anchor bolt positions and subsequent recursive anchor bolt positions are set in each zone. Construction was carried out at the reference anchor points to obtain construction feedback data for the drilling, installation, and pre-tightening stages. The response characteristics of each anchor bolt point are determined based on the construction feedback data, and the response field pattern of the surrounding rock is identified based on the response change between adjacent anchor bolt points. Based on the identified response field pattern, the support parameters for the subsequent recursive anchor points are recursively corrected.

[0011] In one embodiment of the present invention, the acquisition of construction feedback data for the drilling stage, installation stage, and pre-tightening stage includes: The sensors integrated on the anchor drilling rig collect data in real time, including drilling time, number of obstructions, number of stuck drill bits, actual insertion depth of the rod, stirring torque, and pre-tightening torque, and use this data as construction feedback data.

[0012] In one embodiment of the present invention, determining the response characteristics of each anchor point based on the construction feedback data includes: Based on the construction feedback data, a response feature vector for each anchor point is constructed using the hole-forming response value, installation response value, and pre-tightening response value.

[0013] In one embodiment of the present invention, the step of identifying the response field pattern of the surrounding rock based on the response change between adjacent anchor points includes: When sensor acquisition conditions are available, the response changes of adjacent anchor points are calculated, and a continuity threshold is set based on the average response change of the reference anchor point. When the response changes of adjacent anchor points are all less than the continuity threshold and the standard deviation of the response characteristics of each anchor point is less than the preset threshold, it is identified as a uniform field mode. When the response changes of adjacent anchor points change monotonically, it is identified as a gradient field mode. When the response changes of adjacent anchor points exceed a preset multiple of the continuity threshold, it is identified as a sudden change field mode. When the number of times the response changes of adjacent anchor points alternate between positive and negative reaches a preset number, it is identified as an oscillating field mode. When sensor acquisition is not available, the dominant anomaly type is determined based on the classification results of the drilling, installation, and pre-tightening stages. When the dominant anomaly type is the same for two or more consecutive constructed points, the corresponding response mode is determined as a stable response mode, installation-dominant mode, surface load-bearing insufficiency mode, or coupling anomaly mode.

[0014] In one embodiment of the present invention, when sensor acquisition conditions are available, the step of recursively correcting the support parameters of the subsequent recursively predicted anchor bolt points based on the identified response field pattern includes: When the uniform field mode is identified, maintain the original anchor length, spacing, and preload parameters; When a gradient field mode is identified, the anchor density or length is gradually increased according to the gradient direction. When a mutation field pattern is identified, the anchor points are densified on both sides of the mutation point and the support is locally reinforced; When an oscillating field mode is identified, the support path is switched and the control sub-region is redefined.

[0015] In one embodiment of the present invention, when sensor acquisition conditions are unavailable, the step of recursively correcting the support parameters of the subsequent recursively predicted anchor points based on the identified response field pattern includes: When a stable response mode is identified, maintain the original anchor bolt length, spacing, and preload path; When the installation-dominant mode is identified, one of the following should be corrected: anchor length, spacing, or preload parameter. When the surface load-bearing capacity is insufficient, two or more of the following should be jointly corrected: length, spacing, and anchorage configuration, and reinforcement points should be set. When an abnormal coupling mode is identified, the local control sub-zone is redefined, the support path is switched, or a reinforcement support system is added.

[0016] In one embodiment of the present invention, a recursive inheritance and termination step across construction units is also included: After each construction unit is completed, the response field pattern of each partition in that construction unit is used as the initial control basis for the corresponding partition of the next construction unit. If the geological conditions and surrounding rock performance of the previous construction unit and the next construction unit are continuous and consistent, the next construction unit shall inherit the response field mode and correction parameters of the corresponding partition of the previous construction unit. If a response field pattern or dominant anomaly type that is significantly different from that of the previous construction unit appears in the early stage of construction of the subsequent construction unit, the inheritance relationship is terminated, and the identification of the benchmark anchor points and the determination of the response field pattern are carried out again.

[0017] To achieve the above objectives, a second aspect of the present invention provides a recursive correction device for support parameters based on continuous feedback from adjacent anchor bolt construction, comprising: The zoning module is used to divide the roadway area to be supported into multiple zones according to the cross-section, and to set the benchmark anchor bolt positions and subsequent recursive anchor bolt positions in each zone; The construction data acquisition module is used to carry out construction at the reference anchor points and obtain construction feedback data during the drilling, installation and pre-tightening stages. The response field identification module is used to determine the response characteristics of each anchor bolt point based on the construction feedback data, and to identify the response field pattern of the surrounding rock based on the response change between adjacent anchor bolt points. The recursive correction module is used to recursively correct the support parameters of the subsequent recursive anchor points based on the identified response field pattern.

[0018] To achieve the above objectives, a third aspect of this application provides a computer device comprising a processor and a memory; wherein the processor runs a program corresponding to the executable program code stored in the memory, for implementing a method for recursive correction of support parameters based on continuous feedback of adjacent anchor bolt construction as described in the first aspect embodiment.

[0019] To achieve the above objectives, the fourth aspect of this application proposes a non-transitory computer-readable storage medium storing a computer program that, when executed by a processor, implements a method for recursive correction of support parameters based on continuous feedback from adjacent anchor bolt construction, as described in the first aspect embodiment.

[0020] The embodiments of the present invention have the following beneficial effects: This invention constructs a response feature vector from the feedback of the three stages of anchor drilling, installation, and pre-tightening, enabling real-time perception of the surrounding rock condition; it constructs a surrounding rock response field by measuring the response changes at adjacent points and adaptively calibrates the threshold, achieving systematic parameter optimization based on spatial patterns; through recursive correction at adjacent points and adaptive inheritance across units, it shortens the response cycle to a single anchor and enables automatic switching under construction continuity; and it automatically collects data through sensors, avoiding subjective bias and providing quantitative basis for support design optimization and quality traceability. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 A flowchart of a method for recursive correction of support parameters based on continuous feedback from adjacent anchor bolt construction, provided in an embodiment of the present invention; Figure 2This is a schematic diagram of the roadway support zoning provided in an embodiment of the present invention; Figure 3 This is a cross-sectional view of a tunnel construction unit provided in an embodiment of the present invention; Figure 4 This is a structural diagram of a support parameter recursive correction device based on continuous feedback from adjacent anchor bolt construction, provided in an embodiment of the present invention. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the scope of protection of the present invention.

[0024] The following describes, with reference to the accompanying drawings, a method for recursive correction of support parameters based on continuous feedback from adjacent anchor bolt construction, according to an embodiment of the present invention.

[0025] Example 1 This embodiment provides a method for recursive correction of support parameters based on continuous feedback from adjacent anchor bolt construction, such as... Figure 1 As shown, the method includes the following steps: S1 divides the roadway area to be supported into multiple zones according to the cross-section, and sets the benchmark anchor bolt positions and subsequent recursive anchor bolt positions in each zone.

[0026] S2, construct the reference anchor points and obtain construction feedback data for the drilling, installation and pre-tightening stages.

[0027] S3. Determine the response characteristics of each anchor bolt location based on the construction feedback data, and identify the response field pattern of the surrounding rock based on the response change between adjacent anchor bolt locations.

[0028] S4. Based on the identified response field pattern, the support parameters of the subsequent recursive anchor points are recursively corrected.

[0029] The above steps will be explained in detail below with reference to the accompanying drawings.

[0030] I. Zoning and Location Layout.

[0031] First, taking the area to be supported in the roadway as the object, the support area is divided into roof area, left side area, right side area, and roof-side transition area according to the roadway cross-section. At least one reference anchor point is set in each area, and one or more subsequent recursive points are sequentially set within that area based on the reference point. The support parameters of the subsequent recursive points in each area are corrected based on the drilling, installation, and pre-tightening feedback of the previously constructed points in that area. For example... Figure 2 As shown, the number of recursive points is for illustrative purposes only; the actual number will depend on the specific circumstances. Furthermore, the length is divided into several continuous construction units according to the predetermined advance, with each unit corresponding to a support section after one excavation. For example... Figure 3 The figure shown is a cross-sectional view of a tunnel construction unit.

[0032] like Figure 2 As shown, for the top slab area, the reference point in the middle of the top slab can be constructed first, and then the construction can be carried out towards the shoulder corner points on both sides. For the side slab area, the reference point in the middle of the side slab can be constructed first, and then the construction can be carried out towards the adjacent points above and below.

[0033] The construction response formed at the same point during the three stages of drilling, installation and pre-tightening is analyzed in sequence according to the work process, and the dominant anomaly type at that point is identified.

[0034] II. First Implementation Method (Response Field Pattern Recognition Based on Sensor Acquisition)

[0035] This implementation method is applicable to intelligent construction conditions equipped with sensor systems. Specifically, it integrates feed pressure sensors, rotation pressure sensors, displacement sensors, torque sensors, etc., on the anchor drilling rig to collect physical data in real time during the construction process. By analyzing the response field, it identifies the spatial variation law of the surrounding rock and recursively corrects the subsequent support parameters accordingly.

[0036] (a) Sensor configuration and acquisition parameters.

[0037] Configure the sensor according to Table 1 and collect the corresponding parameters.

[0038] Table 1 Sensor Configuration and Acquisition Parameters

[0039] (ii) Response feature vector.

[0040] After obtaining the above-mentioned data, each anchor point The response feature vector is defined as:

[0041] The three components will be explained separately below.

[0042] First, the hole formation response value The calculation formula is as follows:

[0043] in, , , Let be the weighting coefficient, satisfying It can be pre-calibrated according to construction conditions or dynamically determined using principal component analysis based on sensor data from previous reference points. The actual drilling time per unit of footage, in seconds; , The minimum and maximum unit advance time at the reference point; The number of times the propulsion pressure instantaneously exceeds 80% of the rated pressure; The number of times the drill bit gets stuck (the number of times the rotational pressure instantaneously exceeds 90% of the rated pressure and lasts for ≥0.5 seconds); The preset maximum number of times is 5.

[0044] Secondly, install response value

[0045]

[0046] in, The actual insertion depth of the rod, in mm; Insertion depth is specified in mm. The standard deviation of stirring torque is expressed in N·m. This represents the average stirring torque, in N·m.

[0047] Secondly, preload response value

[0048]

[0049] in, The actual preload torque is expressed in N·m. The design preload torque is expressed in N·m. M represents the torque decay value within 30 minutes after pre-tightening, in N·m.

[0050] For n consecutive anchor points within a partition, a response feature matrix is ​​formed:

[0051] (iii) Changes in response at adjacent points and continuity threshold.

[0052] Furthermore, the change in response at adjacent points is calculated using the following formula:

[0053] At the start of each construction unit, for the m reference points (m≥3) prior to construction, calculate the average change in response between adjacent reference points:

[0054] Next, the continuity threshold is defined as:

[0055] Where k is the adjustment coefficient, which is 2 to 3.

[0056] (iv) Response field pattern recognition.

[0057] according to Based on the distribution characteristics, the following response field modes can be identified. The specific judgment conditions and corresponding engineering strategies are shown in Table 2.

[0058] Table 2 Response Field Pattern Recognition and Engineering Strategies

[0059] III. Second Implementation Method.

[0060] Unlike the first embodiment, this embodiment is applicable to conventional construction conditions without a sensor system. In this case, on-site construction personnel classify the three stages of drilling, installation, and pre-tightening at each point by observing and recording visual phenomena during the anchor bolt construction process.

[0061] (a) Classification of the hole formation stage.

[0062] Specifically, the construction response during the hole-forming stage includes three aspects: drilling resistance, hole wall stability, and hole formation status.

[0063] (1) Drilling resistance characterization value A1: Record one or more of the following within the unit design footage: drilling time, number of obvious obstructions, number of stuck drills or skipped drills.

[0064] (2) Hole wall stability characterization value A2: Observe and record one or more of the following: slag return state at the hole opening, slag falling, hole expansion phenomenon, and local hole collapse phenomenon.

[0065] (3) Hole formation achievement characteristic value A3: Record one or more of the following: the achievement of the designed hole depth, the number of repeated hole repairs, and the situation of re-drilling after drilling.

[0066] Based on this, the above-mentioned characterization values ​​are classified according to the following criteria.

[0067] First, the classification standards for the drilling resistance characterization value A1 are as follows: Normal (A1-0) indicates that drilling is continuous and smooth, with no significant increase in time per unit footage, and no obvious jamming or skipping of the drill bit; Slight abnormality (A1-1) indicates that the local drilling resistance is slightly increased, with occasional obstruction, but continuous drilling is still possible; Significant abnormality (A1-2) indicates that the drilling process is repeatedly obstructed, jammed, or skipped, with a significant increase in time per unit footage; Severe abnormality (A1-3) indicates that drilling is continuously difficult, with frequent jamming, and it is difficult to reach the designed hole depth at the normal pace.

[0068] Secondly, the grading standards for the borehole wall stability characterization value A2 are as follows: Normal (A2-0) indicates continuous and stable slag return, with no obvious slag shedding, borehole enlargement, or borehole collapse; Slight abnormality (A2-1) indicates a small amount of slag shedding or local discontinuous slag return, but the borehole wall is basically stable; Significant abnormality (A2-2) indicates continuous slag shedding, abnormal slag return, or significant local borehole enlargement; Severe abnormality (A2-3) indicates significant borehole collapse, borehole wall instability, or difficulty in maintaining the borehole shape.

[0069] Furthermore, the grading standards for the hole formation achievement characteristic value A3 are as follows: Normal (A3-0) indicates that the designed hole depth is reached in one go and the hole shape meets the construction requirements; Slight abnormality (A3-1) indicates that the designed hole depth is basically reached, but there is a small amount of hole repair; Obvious abnormality (A3-2) indicates that multiple hole repairs or partial drilling withdrawals are required before the designed hole depth can be approached; Severe abnormality (A3-3) indicates that it is difficult to reach the designed hole depth or the hole shape obviously does not meet the subsequent installation requirements.

[0070] (ii) Installation phase classification.

[0071] Specifically, during the installation phase, the anchoring agent, anchor rod, and tray are installed into the borehole according to the corresponding construction path, and the compatibility between the anchoring system and the borehole conditions is verified.

[0072] (1) Insertion smoothness characterization value B1: Observe and record one or more of the following: the resistance to the advancement of the anchor rod, the smoothness of the delivery of the anchoring agent, whether there is a midway stop or the rod retraction.

[0073] (2) Characteristic value B2 for uniform mixing: Record one or more of the following: whether the mixing resistance is uniform, whether the rotation propulsion is smooth, whether there is idling, sudden resistance or local instability.

[0074] (3) Completed value B3: Record one or more of the following: the final insertion depth of the rod, the position of the tray, the overflow of material at the orifice, and whether the design installation state has been achieved.

[0075] The grading criteria for each characterization value are as follows.

[0076] Insertion smoothness characterization value B1: Normal (B1-0) indicates that the rod and anchor can enter the design position continuously and smoothly; Slight abnormality (B1-1) indicates that there is slight resistance during the entry process, but it can be completed in one go; Obvious abnormality (B1-2) indicates that there is multiple resistance during the advancement process, and the direction needs to be adjusted or the advancement needs to be repeated; Severe abnormality (B1-3) indicates that the rod or anchor is difficult to enter the position, and the rod needs to be withdrawn, reinstalled, or the original hole needs to be abandoned.

[0077] The uniform mixing characteristic value B2 is as follows: Normal (B2-0) indicates uniform mixing resistance and continuous and stable rotation; Slight abnormality (B2-1) indicates slight fluctuations in resistance, but overall controllable; Significant abnormality (B2-2) indicates significantly uneven changes in resistance, with local idling or sudden changes; Severe abnormality (B2-3) indicates significant mixing instability, prolonged idling, or inability to complete effective mixing.

[0078] The following values ​​represent the completion status of installation: Normal (B3-0) indicates that the pole has reached the designed position, the tray is in the correct position, and the installation is complete; Slight abnormality (B3-1) indicates that the pole is basically in place, but there is a slight deviation; Obvious abnormality (B3-2) indicates that the pole is not in place, the tray is in an abnormal position, or there is obvious local leakage of grout; Severe abnormality (B3-3) indicates that the installation cannot reach the designed state and rework or reinstallation is required.

[0079] (III) Pre-tightening stage classification.

[0080] Specifically, during the pre-tightening stage, a pre-tightening force or pre-tightening torque is applied to the anchor bolt, and the load-bearing capacity between the anchoring system and the surrounding rock surface is verified.

[0081] (1) Pre-tightening establishment characterization value C1: Record one or more of the following: torque growth process, tightening stroke required to reach the target pre-tightening value, and whether abnormal blocking occurs.

[0082] (2) Pallet adhesion characterization value C2: Observe whether the pallet is tilted, suspended, locally crushed or unevenly adhered to the wall after it is pressed.

[0083] (3) Pre-tightening retention characterization value C3: Record whether one or more of the following phenomena occur after the pre-tightening value is reached: retraction, slippage, false tightening, sudden unloading, etc.

[0084] The grading criteria for each characterization value are as follows.

[0085] Pre-tightening establishment characterization value C1: Normal (C1-0) indicates that pre-tightening establishment is continuous and stable, and the target value can be reached; Slight abnormality (C1-1) indicates that pre-tightening establishment is slightly delayed, but the target value can still be reached; Significant abnormality (C1-2) indicates that pre-tightening establishment is discontinuous, and it is difficult to reach the target value; Severe abnormality (C1-3) indicates that effective pre-tightening cannot be established, or the pre-tightening process is significantly interrupted.

[0086] Pallet adhesion characterization value C2: Normal (C2-0) indicates that the pallet adheres smoothly to the wall and has uniform contact; Slight abnormality (C2-1) indicates that the pallet adheres to the wall basically normally, but there is slight unevenness in some areas; Significant abnormality (C2-2) indicates that the pallet is tilted, partially suspended, or partially crushed on the surrounding rock surface; Severe abnormality (C2-3) indicates that the pallet is severely tilted, significantly suspended, and unable to form an effective adhesion with the surrounding rock surface.

[0087] Pre-tightness retention characteristic value C3: Normal (C3-0) indicates that the pre-tightness is stably maintained without obvious backlash or loosening; Slight abnormality (C3-1) indicates that there is slight backlash, but the overall pre-tightness is still maintained effectively; Significant abnormality (C3-2) indicates that there is significant backlash, slippage or loose tightness; Severe abnormality (C3-3) indicates that the pre-tightness cannot be maintained, and significant unloading or failure occurs.

[0088] (iv) Stage status code and dominant exception type determination.

[0089] To achieve hierarchical representation of construction response information, this invention further categorizes the representation values ​​of each stage into stage status codes. Specifically, the hole-forming stage status code SA is determined by the drilling resistance representation value A1, the hole wall stability representation value A2, and the hole-forming achievement representation value A3; the installation stage status code SB is determined by the smooth insertion representation value B1, the uniform mixing representation value B2, and the completed positioning representation value B3; and the pre-tightening stage status code SC is determined by the pre-tightening establishment representation value C1, the tray adhering to the wall representation value C2, and the pre-tightening retention representation value C3.

[0090] The status codes for each stage are divided into four levels: normal, slightly abnormal, predominantly abnormal, and severely abnormal. Specifically, when all characteristic values ​​of each stage are normal or only a single slightly abnormal value exists, the corresponding status code is level 0, SA0; when there is a local abnormality but it does not yet constitute the dominant problem of the stage, the corresponding status code is level 1, SA1; when the key characteristic value of the stage reaches a significant abnormality and has a dominant impact on subsequent construction, the corresponding status code is level 2, SA2; when the stage can no longer meet the requirements for continuing construction according to the conventional path, the corresponding status code is level 3, SA3.

[0091] If SA reaches the abnormal level and the abnormalities of SB and SC can be explained by SA, then the hole-forming stage is considered the dominant factor. When determining whether subsequent stage abnormalities can be explained by hole-forming stage abnormalities, the location of the abnormality, its manifestation, and the continuity of the construction process should be considered. If phenomena such as borehole wall spalling, borehole enlargement, borehole collapse, irregular borehole shape, insufficient borehole depth, or borehole mouth breakage have already occurred during the hole-forming stage, and the installation stage subsequently experiences obstructed rod advancement, poor anchoring agent delivery, insufficient rod positioning, or sudden changes in mixing resistance, and these installation abnormalities can be directly explained by the aforementioned hole-forming abnormalities, then the SB abnormality is determined to be explainable by the SA abnormality. If the hole-forming stage abnormalities mainly occur locally within the borehole, and the installation abnormalities manifest as anchoring agent damage, incorrect delivery sequence, rod bending, insufficient mixing time, or deviation in the advancement angle, then the SB abnormality is not determined to be explainable by the SA abnormality.

[0092] For example, at a certain location, continuous spalling and localized hole enlargement occur during the hole-forming stage, rated A2 as A2-2. Furthermore, multiple hole repairs are required before approaching the designed hole depth, rated A3 as A3-2. Subsequently, during the installation stage, multiple obstructions occur in rod advancement, unsmooth anchoring agent delivery, insufficient rod placement, or sudden changes in stirring resistance, reaching level 2 (B1, B2, or B3). Since the installation anomalies are directly related to previous hole wall instability, irregular hole shape, or insufficient hole depth, the SB anomaly is determined to be caused by the SA anomaly, and this location is judged to be primarily affected by hole-forming. Similar cases exist where the SC anomaly can be explained by SA.

[0093] If SA is basically normal while SB shows the most prominent anomaly, it is judged as installation-dominant; if SA and SB are basically normal while SC shows a prominent anomaly, it is judged as pre-tensioning-dominant; if SA, SB, and SC all reach the abnormal level and reinforce each other, it is judged as coupling-dominant. Within each zone, the current construction response mode of that zone is determined based on the dominant anomaly type of the benchmark anchor point and its adjacent constructed points. These correspond to the stable response mode, installation-dominant mode, insufficient surface bearing capacity mode, and coupling anomaly mode, respectively.

[0094] When two or more consecutive constructed points within the same zone exhibit the same or similar dominant anomaly type, this type is identified as the dominant response mode for the current sub-region of that zone, and this mode is transferred to subsequent construction points. If the construction results at subsequent points are significantly inconsistent with the existing mode, it is determined that the response mode of that zone has changed, and new benchmark points are set to re-identify the response mode of the sub-region. The correction of support parameters for subsequent construction points is no longer based solely on a single joint feedback result, but rather on the established construction response mode for its respective zone.

[0095] (v) Correction level.

[0096] Based on the identified response pattern, the corresponding correction level is further determined and a correction strategy is implemented. In this embodiment, the correction levels are divided into four levels, K0 to K3.

[0097] The K0 level corresponds to a stable response mode, and its correction strategy is to maintain the original anchor length, spacing, and preload path.

[0098] K1 level corresponds to the installation-dominant mode, and its correction strategy is to correct one of the following: anchor length, spacing, or preload parameter.

[0099] K2 level corresponds to the surface bearing insufficiency mode. Its correction strategy is to jointly correct two or more of the following: length, spacing, and anchorage configuration, and set reinforcement points.

[0100] K3 level corresponds to the coupling anomaly mode, and its correction strategy is to re-divide the local control sub-region, switch the support path, or add a reinforcement support system.

[0101] IV. Explanation of the relationship between the two implementation methods.

[0102] It should be noted that the first and second embodiments described above are not two independent technical solutions, but rather two implementation paths formed under different on-site construction conditions within the same framework of recursive correction of support parameters. Both address the same technical problem: utilizing feedback information from drilling, installation, and pre-tightening during the preceding anchor bolt construction process to determine the current response state of the surrounding rock and support construction within the designated zone, and then recursively applying this response state to subsequent adjacent anchor bolt points to correct subsequent support parameters.

[0103] The two implementations differ primarily due to the different methods of acquiring construction feedback information. The first implementation is suitable for intelligent construction conditions equipped with sensor systems, capable of continuously collecting quantitative data such as propulsion pressure, rotation pressure, displacement, and torque, and generating borehole response values, installation response values, and pre-tightening response values. Therefore, its output of "uniform field, gradient field, abrupt change field, and oscillating field" emphasizes the spatial variation of response characteristics at adjacent points, belonging to the spatial response field mode. The second implementation is suitable for conventional construction conditions without sensor systems, relying mainly on construction personnel to record observable phenomena such as drilling obstruction, borehole wall spalling, installation stagnation, uneven tray adhesion, and pre-tightening retreat in a tiered manner. Therefore, its output of "stable response mode, installation-dominant mode, insufficient surface bearing capacity mode, and coupling anomaly mode" emphasizes which construction stage the anomaly primarily originates from, belonging to the dominant anomaly mode.

[0104] Both implementation methods ultimately serve the purpose of recursive correction of subsequent support parameters and are uniformly converted into correction levels from K0 to K3. In this invention, the drilling stage determines the path used in the installation stage, the installation stage determines the path used in the pre-tightening stage, the pre-tightening stage determines whether the current point can be used as the basis for the migration of subsequent point modes, and the response mode formed at the current point determines the support parameters and construction control methods for subsequent points.

[0105] V. Recursive inheritance and termination across construction units.

[0106] After completing a construction unit, information transfer between units must also be considered. Specifically, after each construction unit is completed, the response patterns formed by each zone within that unit are used as the initial control basis for the corresponding zone of the next construction unit. If the geological conditions and surrounding rock performance of the previous and subsequent construction units are continuous and consistent, the subsequent construction unit will preferentially inherit the response patterns and correction parameters of the corresponding zones of the previous unit; if a dominant anomaly type or response field pattern that is significantly different from that of the previous unit appears in the early stage of construction of the subsequent construction unit, the inheritance relationship will be terminated, and the benchmark point identification and pattern determination will be carried out again.

[0107] VI. Complete construction process.

[0108] To facilitate on-site implementation, the above methods are summarized into the following eight specific steps.

[0109] (1) Zoning and Point Layout. The tunnel is divided into roof zone, left side zone, right side zone and roof-side transition zone according to the cross-section. Benchmark points are set in each zone, and subsequent recursive points are set in sequence. The tunnel is divided into continuous construction units according to the advance in length.

[0110] (2) Construction of benchmark points and acquisition of sensor data. Benchmark points in each zone are constructed according to preset support parameters. The anchor drilling rig integrates sensors for propulsion pressure, rotation pressure, displacement, and torque to collect data such as drilling time, number of obstructions, number of stuck drill bits, insertion depth, stirring torque, and pre-tightening torque in real time.

[0111] (3) Response feature vector calculation. Calculate the response feature vector for each location based on the sensor data. Among them, the hole-forming response value reflects the difficulty of drilling, the installation response value reflects the smoothness of the anchoring agent and rod body delivery, and the pre-tightening response value reflects the pre-tightening achievement and retention capability.

[0112] (4) Continuity threshold calibration. Calculate the change in response between adjacent points. The continuity threshold is calculated by multiplying the average change at the reference point by an adjustment coefficient (2-3). .

[0113] (5) Response field pattern recognition. Based on The distribution characteristics are identified by pattern recognition. When two or more consecutive points have the same pattern, it is determined as the dominant pattern of the current sub-region.

[0114] (6) Recursively correct subsequent support parameters. Correction is implemented according to the response field mode: uniform field maintains the original parameters; gradient field densifies the support according to the gradient direction; abrupt field densifies the support points on both sides of the abrupt point; oscillating field switches to combined support of anchor bolts and anchor cables.

[0115] (7) Construction Unit Inheritance. After a construction unit is completed, the response field pattern of each zone is inherited to the next construction unit. If the first 3 points of the next unit are consistent with the inherited pattern, the inheritance continues; otherwise, the reference points and thresholds are recalibrated.

[0116] (8) Data recording and traceability. All sensor data, response feature vectors, pattern recognition results and correction strategies are stored in the controller to form a traceable construction record.

[0117] The above is the complete implementation of this embodiment. Through the two implementation methods described above, the present invention can flexibly select the acquisition path of construction feedback according to the on-site equipment conditions, and form a continuous recursive correction mechanism between adjacent points, thereby effectively improving the timeliness of support parameter adjustment and the adaptability of surrounding rock.

[0118] Example 2 This invention also provides a recursive correction device for support parameters based on continuous feedback from adjacent anchor bolt construction, such as... Figure 4 As shown, the device 10 includes: The zoning module 100 is used to divide the roadway to be supported area into multiple zones according to the cross section, and to set the benchmark anchor bolt positions and subsequent recursive anchor bolt positions in each zone; The construction data acquisition module 200 is used to carry out construction at the reference anchor points and acquire construction feedback data during the drilling, installation and pre-tightening stages. The response field identification module 300 is used to determine the response characteristics of each anchor bolt point based on the construction feedback data, and to identify the response field pattern of the surrounding rock based on the response change between adjacent anchor bolt points. The recursive correction module 400 is used to recursively correct the support parameters of the subsequent recursive anchor points based on the identified response field pattern.

[0119] Example 3 To implement the methods of the above embodiments, the present invention also provides a computer device, which includes a memory and a processor; wherein the processor runs a program corresponding to the executable program code by reading executable program code stored in the memory, so as to implement the various steps of the methods described above.

[0120] Example 4 To implement the above embodiments, this application also proposes a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the method described in the foregoing embodiments.

[0121] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0122] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0123] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A method for recursive correction of support parameters based on continuous feedback from adjacent anchor bolt construction, characterized in that, Includes the following steps: The roadway area to be supported is divided into multiple zones according to the cross-section, and the benchmark anchor bolt positions and subsequent recursive anchor bolt positions are set in each zone. Construction was carried out at the reference anchor points to obtain construction feedback data for the drilling, installation, and pre-tightening stages. The response characteristics of each anchor bolt point are determined based on the construction feedback data, and the response field pattern of the surrounding rock is identified based on the response change between adjacent anchor bolt points. Based on the identified response field pattern, the support parameters for the subsequent recursive anchor points are recursively corrected.

2. The method according to claim 1, characterized in that, The construction feedback data obtained during the drilling, installation, and pre-tightening stages includes: The sensors integrated on the anchor drilling rig collect data in real time, including drilling time, number of obstructions, number of stuck drill bits, actual insertion depth of the rod, stirring torque, and pre-tightening torque, and use this data as construction feedback data.

3. The method according to claim 1, characterized in that, The step of determining the response characteristics of each anchor point based on the construction feedback data includes: Based on the construction feedback data, a response feature vector for each anchor point is constructed using the hole-forming response value, installation response value, and pre-tightening response value.

4. The method according to claim 1, characterized in that, The method for identifying the response field pattern of the surrounding rock based on the response change between adjacent anchor points includes: When sensor acquisition conditions are available, the response changes of adjacent anchor points are calculated, and a continuity threshold is set based on the average response change of the reference anchor point. When the response changes of adjacent anchor points are all less than the continuity threshold and the standard deviation of the response characteristics of each anchor point is less than the preset threshold, it is identified as a uniform field mode. When the response changes of adjacent anchor points change monotonically, it is identified as a gradient field mode. When the response changes of adjacent anchor points exceed a preset multiple of the continuity threshold, it is identified as a sudden change field mode. When the number of times the response changes of adjacent anchor points alternate between positive and negative reaches a preset number, it is identified as an oscillating field mode. When sensor acquisition is not available, the dominant anomaly type is determined based on the classification results of the drilling, installation, and pre-tightening stages. When the dominant anomaly type is the same for two or more consecutive constructed points, the corresponding response mode is determined as a stable response mode, installation-dominant mode, surface load-bearing insufficiency mode, or coupling anomaly mode.

5. The method according to claim 4, characterized in that, When sensor acquisition conditions are available, the step of recursively correcting the support parameters of the subsequent recursive anchor points based on the identified response field pattern includes: When the uniform field mode is identified, maintain the original anchor length, spacing, and preload parameters; When a gradient field mode is identified, the anchor density or length is gradually increased according to the gradient direction. When a mutation field pattern is identified, the anchor points are densified on both sides of the mutation point and the support is locally reinforced; When an oscillating field mode is identified, the support path is switched and the control sub-region is redefined.

6. The method according to claim 4, characterized in that, When sensor data acquisition is not available, the step of recursively correcting the support parameters of the subsequent anchor points based on the identified response field pattern includes: When a stable response mode is identified, maintain the original anchor bolt length, spacing, and preload path; When the installation-dominant mode is identified, one of the following should be corrected: anchor length, spacing, or preload parameter. When the surface load-bearing capacity is insufficient, two or more of the following should be jointly corrected: length, spacing, and anchorage configuration, and reinforcement points should be set. When an abnormal coupling mode is identified, the local control sub-zone is redefined, the support path is switched, or a reinforcement support system is added.

7. The method according to claim 1, characterized in that, It also includes recursive inheritance and termination steps across construction units: After each construction unit is completed, the response field pattern of each partition in that construction unit is used as the initial control basis for the corresponding partition of the next construction unit. If the geological conditions and surrounding rock performance of the previous construction unit and the next construction unit are continuous and consistent, the next construction unit shall inherit the response field mode and correction parameters of the corresponding partition of the previous construction unit. If a response field pattern or dominant anomaly type that is significantly different from that of the previous construction unit appears in the early stage of construction of the subsequent construction unit, the inheritance relationship is terminated, and the identification of the benchmark anchor points and the determination of the response field pattern are carried out again.

8. A recursive correction device for support parameters based on continuous feedback from adjacent anchor bolt construction, characterized in that, include: The zoning module is used to divide the roadway area to be supported into multiple zones according to the cross-section, and to set the benchmark anchor bolt positions and subsequent recursive anchor bolt positions in each zone; The construction data acquisition module is used to carry out construction at the reference anchor points and obtain construction feedback data during the drilling, installation and pre-tightening stages. The response field identification module is used to determine the response characteristics of each anchor bolt point based on the construction feedback data, and to identify the response field pattern of the surrounding rock based on the response change between adjacent anchor bolt points. The recursive correction module is used to recursively correct the support parameters of the subsequent recursive anchor points based on the identified response field pattern.

9. A computer device, characterized in that, Including processor and memory; The processor reads the executable program code stored in the memory to run the program corresponding to the executable program code, so as to implement the support parameter recursive correction method based on continuous feedback of adjacent anchor bolt construction as described in any one of claims 1-7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements a method for recursive correction of support parameters based on continuous feedback from adjacent anchor bolt construction as described in any one of claims 1-7.

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