Resistance identification method and device for hydraulic support

Abstract

The invention provides a resistance identification method and device for a hydraulic support. The method comprises the steps that resistance reduction is conducted on the hydraulic support, and a resistance value when the resistance reduction amount is larger than or equal to a set threshold value is determined to serve as a reference resistance low point; according to the to-be-recognized target resistance of the hydraulic support, the target search direction and the target search duration are determined, and the target resistance is the circulation initial supporting force of the current circulation of the hydraulic support or the circulation end resistance of the last circulation of the hydraulic support; performing working resistance search in the target search duration according to the target search direction from the reference resistance low point to obtain a working resistance extreme value corresponding to the target resistance; and target resistance is recognized based on the working resistance extreme value, and the target resistance of the hydraulic support is obtained. According to the method, a reference resistance low point is searched, and searching and identification processes in corresponding directions are carried out in combination with the characteristics of the cyclic initial supporting force or the cyclic final resistance, so that identification of the cyclic initial supporting force or the cyclic final resistance is more accurate, and intelligent monitoring of the hydraulic support can be realized.

Description

Technical Field

[0001] The present application relates to the field of coal mine safety technology, and in particular to a method and device for identifying resistance of a hydraulic support. Background Art

[0002] The initial support force and final resistance in the coal cutting cycle are the basis of all data in the field of coal mine pressure and rock control. Accurate identification of the initial support force and final resistance in each coal cutting cycle has become a major research hotspot for the realization of intelligent monitoring and early warning of roof disasters. Summary of the invention

[0003] The purpose of this application is to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the first purpose of the present application is to propose a resistance identification method for a hydraulic support, so as to identify the specific resistance of the hydraulic support, monitor the safety of the hydraulic support, and improve the safety of underground operations.

[0005] The second objective of the present application is to provide a resistance identification device for a hydraulic support.

[0006] The third objective of the present application is to provide an electronic device.

[0007] A fourth objective of the present application is to provide a computer-readable storage medium.

[0008] A fifth object of the present application is to provide a computer program product.

[0009] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a method for identifying resistance of a hydraulic support, comprising:

[0010] Reduce the resistance of the hydraulic support and determine the resistance value when the resistance reduction is greater than or equal to the set threshold value as the reference resistance low point;

[0011] Determine the target search direction and target search duration according to the target resistance to be identified of the hydraulic support, wherein the target resistance is the initial support force of the current cycle of the hydraulic support, or the final resistance of the previous cycle of the hydraulic support;

[0012] From the reference resistance low point, perform a working resistance search in the target search direction within the target search duration to obtain a working resistance extreme value corresponding to the target resistance;

[0013] The target resistance is identified based on the extreme value of the working resistance to obtain the target resistance of the hydraulic support.

[0014] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a resistance identification device for a hydraulic support, comprising:

[0015] The first determination module is used to reduce the resistance of the hydraulic support and determine the resistance value when the resistance reduction amount is greater than or equal to a set threshold value as a reference resistance low point;

[0016] A second determination module is used to determine a target search direction and a target search duration according to a target resistance to be identified by the hydraulic support, wherein the target resistance is an initial cycle support force of a current cycle of the hydraulic support, or an end cycle resistance of a previous cycle of the hydraulic support;

[0017] A search module, configured to search for working resistance from the reference resistance low point in the target search direction within the target search time, and obtain a working resistance extreme value corresponding to the target resistance;

[0018] The identification module is used to identify the target resistance based on the extreme value of the working resistance and obtain the target resistance of the hydraulic support.

[0019] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes an electronic device, comprising: a processor; and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the processor can execute the resistance identification method of the hydraulic support described in the first aspect embodiment above.

[0020] To achieve the above-mentioned purpose, the fourth aspect of the present application proposes a computer-readable storage medium on which a computer program is stored, and the computer instructions are used to enable the computer to execute the resistance identification method of the hydraulic support described in the first aspect of the embodiment.

[0021] To achieve the above-mentioned purpose, the fifth embodiment of the present application proposes a computer program product, including a computer program, which, when executed by a processor, implements the resistance identification method of the hydraulic support described in the first embodiment above.

[0022] The resistance identification method and device of the hydraulic support provided in the present application first finds the reference resistance low point, further combines the characteristics of the initial support force of the cycle or the final resistance of the cycle, and performs a search and identification process in the corresponding direction based on the reference resistance low point. This can make the identification of the initial support force of the cycle or the final resistance of the cycle of the hydraulic support more accurate, and can not only realize the intelligent monitoring of the hydraulic support, but also improve the safety of the hydraulic support and improve the safety of underground operations.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 A schematic flow chart of a method for identifying resistance of a hydraulic support provided in an embodiment of the present application;

[0026] Figure 2 A schematic flow chart of another method for identifying resistance of a hydraulic support provided in an embodiment of the present application;

[0027] Figure 3 A schematic flow chart of another method for identifying resistance of a hydraulic support provided in an embodiment of the present application;

[0028] Figure 4 A schematic flow chart of another method for identifying resistance of a hydraulic support provided in an embodiment of the present application;

[0029] Figure 5 A schematic structural diagram of a resistance identification device for a hydraulic support provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0031] When the hydraulic support of the comprehensive mining working face is lifted to support the roof, when the liquid pressure in the lower cavity of the column reaches the pressure of the pump station, the initial support force generated by the support on the roof is the initial support force of the support. The initial support force is one of the most important technical indicators of the hydraulic support of the comprehensive mining working face. After the pressure is relieved, the support moves forward one step. After it moves to the new support position, the pump station and the liquid supply pipeline will give pressure to raise the support until the support "connects the top" and meets the support requirements. When the pump station finally stops supplying liquid, the internal pressure of the support column is called the initial support force of the support. The initial support force is the active support force given to the roof by the support column through pump pressure. A larger initial support force can enable the support column to reach the working resistance faster, reduce the amount of roof sinking, and prevent the roof from early delamination and crushing. The initial support force is extremely important for mining field support. .

[0032] The end-of-cycle resistance is the working resistance before the support is lowered at the end of a coal mining cycle. It is a special working resistance. Generally, the end-of-cycle resistance is the maximum working resistance of the support in a cycle. The end-of-cycle resistance is one of the important indicators for evaluating the strength of the roof pressure and the mine pressure of the working face. The initial support force and the end-of-cycle resistance of the support represent the beginning and end of a cycle, thereby dividing the support working resistance curve within a period of time into multiple cycles.

[0033] The following describes the resistance identification method and device of the hydraulic support in the embodiment of the present application with reference to the accompanying drawings.

[0034] Figure 1 The following is a flow chart of a method for identifying resistance of a hydraulic support provided in an embodiment of the present application. Figure 1 As shown, the resistance identification of the hydraulic support may include but is not limited to the following steps:

[0035] S101, reducing the resistance of the hydraulic support, and determining the resistance value when the resistance reduction amount is greater than or equal to a set threshold value as a reference resistance low point.

[0036] In some embodiments, the column of the hydraulic support can be controlled to reduce resistance, and the amount of resistance reduction can be monitored. In response to the resistance reduction amount of the column of the hydraulic support being greater than or equal to a set threshold, the resistance value of the hydraulic support at that moment can be used as a reference resistance low point. In the embodiment of the present application, the reference resistance low point can be marked as D1.

[0037] In some embodiments, the threshold value may be set according to the type of hydraulic support, or the working parameters of the hydraulic support, or actual demand, or calibration experimental data. For example, the threshold value may be set to 5 MPa.

[0038] S102, determining a target search direction and a target search duration according to the target resistance to be identified by the hydraulic support.

[0039] In some implementations, the target resistance is the initial support force of the current cycle of the hydraulic support, or the final resistance of the previous cycle of the hydraulic support. In the embodiment of the present application, the initial support force of the current cycle of the hydraulic support can be marked as P c ; The end-of-cycle resistance of the hydraulic support can be marked as P t .

[0040] In some embodiments, if the identified target resistance is the initial support force of the current cycle of the hydraulic support, the target search direction is determined to be searched from the reference resistance low point D1 to the subsequent time, and further, the target search duration can be the first search duration. Optionally, the first search duration can be set according to actual conditions, for example, it can be set to 200 seconds, and the search can be performed within 200 seconds from the reference resistance low point D1 to determine the initial support force of the current cycle.

[0041] In some embodiments, if the identified target resistance is the end-of-cycle resistance of the previous cycle of the hydraulic support, the target search direction is determined to search from the reference resistance low point D1 to the previous sequence time, and further, the target search duration can be a second search duration. Optionally, the second search duration can be set according to actual conditions, for example, it can be set to 300 seconds, and the search can be performed within 300 seconds from the reference resistance low point D1 to determine the end-of-cycle resistance of the previous cycle.

[0042] In some embodiments, the first search duration is less than the second search duration.

[0043] S103, performing a working resistance search from a reference resistance low point according to a target search direction within a target search time period to obtain a working resistance extreme value corresponding to the target resistance.

[0044] In some embodiments, if the identified target resistance is the initial support force of the current cycle of the hydraulic support, a search is performed from the reference resistance low point D1 to the subsequent time according to the first search duration to obtain the minimum working resistance value as the resistance extreme value corresponding to the initial support force of the current cycle of the hydraulic support. In the embodiment of the present application, the minimum working resistance value can be marked as D min .

[0045] In some embodiments, multiple minimum working resistance values ​​D are searched within the first search duration. min , select the minimum working resistance value D at the latest time point min , which is the extreme value of resistance corresponding to the initial support force of the current cycle of the hydraulic support.

[0046] In some embodiments, if the identified target resistance is the end-of-cycle resistance of the previous cycle of the hydraulic support, a search is performed from the reference resistance low point D1 to the previous sequence time according to the second search duration to obtain the maximum working resistance value as the resistance extreme value corresponding to the end-of-cycle resistance of the previous cycle of the hydraulic support. In the embodiment of the present application, the maximum working resistance value can be taken as the undetermined value of the end-of-cycle resistance, which can be marked as P t1 .

[0047] In some embodiments, if the maximum working resistance value D is not found within the second search time, max, the resistance value corresponding to the reference resistance low point D1 is determined as the resistance extreme value corresponding to the end resistance of the previous cycle. D1 The maximum working resistance value required to identify the end-of-cycle resistance of the hydraulic support is the undetermined value P of the end-of-cycle resistance. t1 .

[0048] S104, identifying the target resistance based on the extreme value of the working resistance, and obtaining the target resistance of the hydraulic support.

[0049] In some embodiments, the target resistance to be identified is the initial support force of the current cycle of the hydraulic support, and the minimum working resistance value D is determined from the extreme resistance value (that is, the minimum working resistance value D in step S102). min ), control the hydraulic support to start the current cycle of lifting and increasing resistance, and search for the candidate first resistance point when the resistance increasing speed is greater than the set speed threshold within the third search time, and further determine the second resistance point P that is last searched out among the candidate first resistance points c1 , and determine the second resistance point P c1 The time interval from D to the time when the hydraulic support starts to reduce resistance, wherein the time interval is the duration T of the current cycle. Optionally, the third search time can be set according to actual conditions, for example, set to 200 seconds. Optionally, the speed threshold can be set according to actual conditions, for example, set to 2Mpa / min, that is, from D min Start searching within 200 seconds to obtain the first resistance point where the resistance increase rate is greater than MPa / min.

[0050] In some embodiments, if the cycle duration T of the current cycle is greater than or equal to the set time length, the second resistance point P is determined. c1 The corresponding resistance value is the initial support force P of the hydraulic support in the current cycle. c That is, P c =P c1 Optionally, the set time length can be set according to actual conditions, for example, the set time length can be 20 minutes. That is, T ≥ 20min, determine P c =P c1 .

[0051] In some embodiments, if the cycle duration of the current cycle is less than the set time length (ie, T < 20 min), and the resistance reduction amount is greater than or equal to the set threshold, the current cycle is abandoned and the next reference resistance low point D1 is captured.

[0052] In some embodiments, if the cycle duration of the current cycle is less than the set time length and the resistance reduction amount is less than the set threshold, the second resistance point P is determined. c1The corresponding resistance value is the initial support force P of the hydraulic support in the current cycle. c That is to say, T<20min, and the resistance reduction is <5Mpa, determine P c =P c1 .

[0053] In some embodiments, if the candidate first resistance point is not found within the third search time, the resistance extreme value D may be directly determined. min The initial support force P of the hydraulic support in the current cycle c That is to say, the minimum value of the working resistance is directly determined as the initial support force of the current cycle of the hydraulic support.

[0054] In some embodiments, the target resistance to be identified is the end-of-cycle resistance of the hydraulic support in the previous cycle, and the resistance extreme value (that is, the maximum working resistance value P determined in step S102) is obtained. t1 ) adjacent to the historical working resistance extreme value (that is, the value of P t1 The adjacent historical maximum working resistance value can be marked as P t2 ), according to the magnitude relationship between the working resistance extreme value and the historical resistance extreme value, the end-of-cycle resistance P of the hydraulic support in the previous cycle is determined from the working resistance extreme value and the historical working resistance extreme value. t .

[0055] In some embodiments, in response to the maximum working resistance value P t1 Greater than the historical maximum working resistance P t2 , determine the end-of-cycle resistance P of the hydraulic support t is the maximum working resistance P t1 ; or, in response to the maximum historical working resistance value P t2 Greater than the maximum working resistance P t1 , obtain the maximum historical working resistance value P t2 And the maximum working resistance P t1 When the difference is greater than or equal to the set value, the end-of-cycle resistance of the hydraulic support in the previous cycle is determined to be the maximum historical working resistance value P. t2 ; or, in response to the maximum historical working resistance value P t2 Greater than the maximum working resistance P t1 , and the difference is less than the set value, the end-of-cycle resistance of the hydraulic support in the previous cycle is determined to be the maximum working resistance P t1 .

[0056] like Figure 2 As shown, the reference resistance point D1 can be identified, and the initial support force P of the current cycle of the hydraulic support can be identified. c In the case of D1, we can search from the next moment to capture the first D min, and from the first D min Start searching for 200 seconds to get P c .like Figure 2 As shown, in the first D min No satisfying initial cycle force P is identified within the next 200 seconds. c , a second search can be performed to capture the second D min , then from the second D min Continue searching for 200 seconds and identify the initial support force P that meets the conditions. c It is understandable that from D1 to the first D min The last 200 seconds can be considered an invalid action.

[0057] Identify the end-of-cycle resistance P of a hydraulic support t In the case of P, we can search from D1 to the previous 300 seconds to get t1 .like Figure 2 As shown, in getting P t1 Then we can continue to search forward to get P t2 , based on P t1 and P t2 The size of determines the end-of-cycle resistance of the previous cycle.

[0058] In the embodiment of the present application, the reference resistance low point is first found, and then combined with the characteristics of the initial support force of the cycle or the final resistance of the cycle, a search and identification process in the corresponding direction is performed based on the reference resistance low point. This can make the identification of the initial support force of the cycle or the final resistance of the cycle of the hydraulic support more accurate, which can not only realize the intelligent monitoring of the hydraulic support, but also improve the safety of the hydraulic support and improve the safety of underground operations.

[0059] Figure 3 The present invention provides a flow chart of a method for identifying the cyclic initial support force of a hydraulic support. Figure 3 As shown, the method for identifying the cyclic initial support force of the hydraulic support may include but is not limited to the following steps:

[0060] S301, find the reference resistance low point D1 where the resistance reduction is greater than 5 MPa.

[0061] S302, searching for the minimum working resistance within 200 seconds from D1, and marking the point with the largest minimum time value as Dmin.

[0062] S303, determining whether a working resistance point where the resistance increasing speed exceeds 2 MPa / min is captured within 200 seconds after Dmin.

[0063] In response to capturing a working resistance point where the resistance increasing speed exceeds 2 MPa / min, executing step S304;

[0064] In response to not capturing a working resistance point where the resistance increasing speed exceeds 2 MPa / min, executing step S310;

[0065] S304, the last working resistance point that meets the conditions is recorded as the initial support force of the cycle Pc1.

[0066] S305, the time from Pc1 to the point where the rack starts to reduce rent is recorded as the cycle duration T.

[0067] S306, determining whether T is greater than or equal to 200 min.

[0068] In response to T being greater than or equal to 20 min, executing step S307;

[0069] In response to T being less than 20 min, step S308 is executed.

[0070] S307, determine the initial support force P of the cycle c =P c1 .

[0071] S308, determining whether the resistance reduction is greater than or equal to 5 MPa.

[0072] In response to the resistance reduction being greater than or equal to 5 MPa, executing step S309;

[0073] In response to the resistance reduction being less than 5 MPa, step S307 is executed.

[0074] S309, abandon the cycle and capture the next D1 point.

[0075] S310, determine the resistance value of Dmin as the initial support force P of the cycle c .

[0076] That is to say, the resistance reduction of the hydraulic support column is set as the threshold of 5MPa. In response to the support resistance reduction reaching the set threshold, it is recorded as a reference low resistance point D1. Within 200s after point D1 (including point D1), the lowest point of the support working resistance is found and recorded as Dmin. If the lowest point of the support working resistance appears at the same time at adjacent time points, the time value with a larger value is recorded as Dmin.

[0077] Further, from the lowest point D captured min At the beginning, the hydraulic support starts the next cycle of rapid resistance increase. Within 200s after point D1, the support resistance increase speed is used as the judgment standard to capture the working resistance point where the support resistance increase speed is greater than 2MPa / min. The last point that meets the condition is recorded as the initial support force P of the next cycle. c1If there is no support working resistance point that meets the conditions within the next 200 seconds, D min The value of the point is denoted by P c1 .

[0078] Furthermore, the time from Pc1 to the point where the support starts to reduce resistance is recorded as T. If the cycle duration is greater than or equal to 20 minutes, that is, T≥20 minutes, then the initial support force of the cycle Pc=Pc1; if the cycle duration is less than 20 minutes, that is, T<20 minutes, and the resistance reduction reaches 5 MPa or more, then the cycle is judged to be a false cycle, and the cycle is discarded, and the initial support force captured in the cycle is not counted; the newly appeared low point is re-recorded as D1, and the above steps are repeated to recapture the initial support force of the cycle.

[0079] In the embodiment of the present application, the reference resistance low point is first found, and then combined with the characteristics of the cycle initial support force, the reference resistance low point is used as the basis to search for subsequent moments to obtain the minimum working resistance value, and then the cycle initial support force of the current cycle can be determined based on the specific identification process of the minimum working resistance value and the cycle initial support force, so that the identification of the cycle initial support force of the hydraulic support is more accurate, which can not only realize the intelligent monitoring of the hydraulic support, but also improve the safety of the hydraulic support and improve the safety of underground operations.

[0080] Figure 4 The following is a flow chart of a method for identifying the end-of-cycle resistance of a hydraulic support provided in an embodiment of the present application. Figure 4 As shown, the method for identifying the end-of-cycle resistance of the hydraulic support may include but is not limited to the following steps:

[0081] S401, find the reference resistance low point D1 with a resistance reduction greater than 5MPa, and mark the corresponding working resistance as P D1 .

[0082] S402, search for the maximum value of the working resistance within 300 seconds from D1.

[0083] In response to finding the maximum working resistance value within the first 300 seconds, step S403 is executed.

[0084] In response to not finding the maximum working resistance value within the first 300 seconds, step S404 is executed.

[0085] S403, determine the maximum working resistance value as P t1 .

[0086] S404, determine P t1 =P D1 .

[0087] S405, obtain t1 The adjacent previous working resistance value Pt2 .

[0088] S406, determine P t1 Is it greater than P t2 .

[0089] In response to P t1 Greater than P t2 , execute step S407.

[0090] In response to P t1 Less than or equal to P t2 , execute step S408.

[0091] S407, determine the end-of-cycle resistance P of the previous cycle t =P t1 .

[0092] S408, obtain P t1 and P t2 and determine whether the difference is greater than or equal to the set difference of 1Mpa.

[0093] In response to the difference being greater than the set difference of 1 MPa, step S407 is executed.

[0094] In response to the difference being less than 1 MPa, step S409 is executed.

[0095] 409, determine the end-of-cycle resistance P of the previous cycle t =P t1 .

[0096] That is to say, the resistance reduction of the hydraulic support column is set as 5MPa as the threshold value. When the resistance reduction of the support reaches the threshold value, it is recorded as a reference resistance low point D1, and the support working resistance at this point is recorded as P D1 ; Capture the point with the maximum value of the support working resistance within 300s before point D1. If the maximum value point exists, it is recorded as the undetermined value of the final resistance of the cycle support, and the working resistance value is recorded as P t1 If there is no maximum value of the support working resistance within 300s before point D1, then P D1 It is recorded as the undetermined value of the final resistance of the circulation support P t1 .

[0097] P t1 As the starting point, find t1 The previous working resistance value is recorded as P t2 , P t1 With P t2 Compare, if P t1 >P t2 , then confirm P t1 is the support end resistance of the previous cycle, denoted as P t , that is, Pt =P t1 ; if P t1 <P t2 , and P t2 -P t1 ≥1MPa, the resistance value at the end of the previous cycle is corrected to P t2 , that is, P t =P t2 .

[0098] In the embodiment of the present application, the reference resistance low point is first found, and then combined with the characteristics of the end-of-cycle resistance, the reference resistance low point is used as the basis to search forward to obtain the maximum working resistance value, and then the end-of-cycle resistance of the previous cycle can be determined based on the specific identification process of the maximum working resistance value and the end-of-cycle resistance, so that the identification of the end-of-cycle resistance of the hydraulic support is more accurate, which can not only realize the intelligent monitoring of the hydraulic support, but also improve the safety of the hydraulic support and improve the safety of underground operations.

[0099] Figure 5 This is a schematic diagram of the structure of a resistance identification device for a hydraulic support provided in an embodiment of the present application. Figure 5 As shown, the resistance identification device 500 of the hydraulic support includes: a first determination module 501 , a second determination module 502 , a search module 503 and an identification module 504 .

[0100] The first determination module 501 is used to reduce the resistance of the hydraulic support and determine the resistance value when the resistance reduction amount is greater than or equal to a set threshold value as a reference resistance low point;

[0101] The second determination module 502 is used to determine the target search direction and target search duration according to the target resistance to be identified of the hydraulic support, wherein the target resistance is the initial support force of the current cycle of the hydraulic support, or the final resistance of the previous cycle of the hydraulic support;

[0102] A search module 503 is used to search for working resistance from the reference resistance low point in the target search direction within the target search time to obtain a working resistance extreme value corresponding to the target resistance;

[0103] The identification module 504 is used to identify the target resistance based on the extreme value of the working resistance, and obtain the target resistance of the hydraulic support.

[0104] In some embodiments, the second determining module 502 is further configured to:

[0105] In response to the target resistance being the initial support force of the cycle, determining the target search direction to search from the reference resistance low point to a subsequent time, and the target search duration to be a first search duration;

[0106] In response to the target resistance being the end-of-cycle resistance, the target search direction is determined to be a search from the reference resistance low point toward a preceding moment, and the target search duration is a second search duration.

[0107] In some embodiments, the search module 503 is further configured to:

[0108] In response to the target resistance being the initial support force of the cycle, searching from the reference resistance low point to a subsequent time according to a first search duration to obtain a working minimum value as the working resistance extreme value;

[0109] In response to the target resistance being the end-of-cycle resistance, a search is performed from the reference resistance low point toward the preceding moment according to a second search duration to obtain the maximum working resistance value as the working resistance extreme value.

[0110] In some embodiments, the search module 503 is further configured to:

[0111] In response to searching for multiple minimum working resistance values ​​within the first search time, selecting the minimum working resistance value at the latest time point as the extreme working resistance value; or,

[0112] In response to not finding the maximum working resistance value within the second search time period, determining that the working resistance extreme value is the resistance value corresponding to the reference resistance low point.

[0113] In some embodiments, the identification module 504 is further configured to:

[0114] In response to the target resistance being the initial support force of the cycle, starting from the extreme value of the working resistance, controlling the hydraulic support to start the current cycle of raising the frame and increasing the resistance, and searching for a candidate first resistance point when the resistance increasing speed is greater than a set speed threshold within a third search time;

[0115] Determine the second resistance point that is last searched out among the candidate first resistance points;

[0116] Determine the time interval from the second resistance point to the time when the hydraulic support starts to reduce resistance, wherein the time interval is the cycle duration of the current cycle;

[0117] In response to the cycle duration being greater than or equal to a set time length, the resistance value corresponding to the second resistance point is determined as the cycle initial support force.

[0118] In some embodiments, the identification module 504 is further configured to:

[0119] In response to the cycle duration being less than the set time length, and the resistance reduction amount being greater than or equal to the set threshold, abandoning this cycle and returning to capture the next reference resistance low point;

[0120] In response to the cycle duration being less than the set time length and the resistance reduction being less than the set threshold, the resistance value of the second resistance point is determined to be the cycle initial support force.

[0121] In some embodiments, the search module 503 is further configured to:

[0122] In response to not finding the first resistance point within the third search time period, determining the working resistance extreme value as the cycle initial support force.

[0123] In some embodiments, the identification module 504 is further configured to:

[0124] In response to the target resistance being the end-of-cycle resistance, obtaining a historical working resistance extreme value adjacent to the working resistance extreme value;

[0125] According to the magnitude relationship between the working resistance extreme value and the historical working resistance extreme value, the end-of-cycle resistance is determined from the working resistance extreme value and the historical resistance extreme value.

[0126] In some embodiments, the identification module 504 is further configured to:

[0127] In response to the working resistance extreme value being greater than the historical working resistance extreme value, determining the end-of-cycle resistance as the working resistance extreme value; or,

[0128] In response to the historical working resistance extreme value being greater than the working resistance extreme value, obtaining the difference between the historical resistance extreme value and the working resistance extreme value, and determining the end-of-cycle resistance to be the historical working resistance extreme value when the difference is greater than or equal to a set value; or

[0129] In response to the historical working resistance extreme value being greater than the working resistance extreme value, and the difference being less than a set value, the end-of-cycle resistance is determined to be the working resistance extreme value.

[0130] In the embodiment of the present application, the reference resistance low point is first found, and then combined with the characteristics of the initial support force of the cycle or the final resistance of the cycle, a search and identification process in the corresponding direction is performed based on the reference resistance low point. This can make the identification of the initial support force of the cycle or the final resistance of the cycle of the hydraulic support more accurate, which can not only realize the intelligent monitoring of the hydraulic support, but also improve the safety of the hydraulic support and improve the safety of underground operations.

[0131] Table 1 is a comparison table of the accuracy of the initial support force of the 12401 working face of a certain mine based on the existing identification method and the identification method provided by this application, and Table 2 is a comparison table of the accuracy of the final resistance of the 12401 working face of a certain mine based on the existing identification method and the identification method provided by this application. See Table 1 and Table 2, the specific comparison results are as follows:

[0132] Taking the mine pressure data of more than 40 coal mining cycles of the 12401 working face of a mine during normal production in May 2018 as an example, the accuracy of the existing and new methods for judging the initial support force and final resistance is compared, as shown in Table 1 and Table 2, respectively. The initial support force captured by the existing initial support force judgment method is 0.9MPa different from the actual value on average, with an error percentage of 3.4%. The initial support force captured by the new initial support force judgment method has an error value of 0-8.8MPa, an average of 0.3MPa, and an average error percentage of 1.3%. In terms of the size of the initial support force, the new method is 2.1 percentage points higher than the existing method. As shown in Table 3, the error of the final resistance captured by the existing final resistance judgment method is 0-12.5MPa, an average of 0.4MPa, and an error percentage of 0.9%. The final resistance captured by the new final resistance judgment method has an average error of 0.1MPa compared with the actual value, and an error percentage of 0.2%. In terms of the magnitude of the final resistance, both methods have good accuracy.

[0133] The actual number of cycles is 40. Using the existing discrimination method, the number of initial support force and final resistance captured is 43, with 3 more invalid cycles and an error percentage of 7.5%. Using the new discrimination method, the number of initial support force and final resistance captured is 40, achieving zero error in capturing the initial support force and final resistance positions, and the accuracy is improved by 7.5%. It can be seen that the new initial support force and final resistance discrimination method has significantly improved the accuracy in capturing the initial support force and final resistance positions and the initial support force and final resistance sizes.

[0134] Table 1

[0135]

[0136]

[0137] Table 2

[0138]

[0139]

[0140] It should be noted that the explanation of the aforementioned embodiment of the resistance identification method of a hydraulic support is also applicable to the resistance identification device of a hydraulic support of this embodiment, which will not be repeated here.

[0141] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0142] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0143] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0144] The collection, storage, use, processing, transmission, provision and application of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0145] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0146] This application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, this application is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, risks can be minimized by limiting data collection and deleting data. In addition, when applicable, personal identifiers are removed from such personal information to protect the privacy of users.

[0147] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0148] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0149] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0150] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0151] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0152] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0153] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0154] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for identifying resistance of a hydraulic support, characterized in that: The method comprises: Reduce the resistance of the hydraulic support and determine the resistance value when the resistance reduction is greater than or equal to the set threshold value as the reference resistance low point; Determine the target search direction and target search duration according to the target resistance to be identified of the hydraulic support, wherein the target resistance is the initial support force of the current cycle of the hydraulic support, or the final resistance of the previous cycle of the hydraulic support; From the reference resistance low point, perform a working resistance search in the target search direction within the target search duration to obtain a working resistance extreme value corresponding to the target resistance; The target resistance is identified based on the extreme value of the working resistance to obtain the target resistance of the hydraulic support.

2. The method according to claim 1, characterized in that The step of determining a target search direction and a target search duration according to the target resistance to be identified by the hydraulic support comprises: In response to the target resistance being the initial support force of the cycle, determining the target search direction to search from the reference resistance low point to a subsequent time, and the target search duration to be a first search duration; In response to the target resistance being the end-of-cycle resistance, the target search direction is determined to be a search from the reference resistance low point toward a preceding moment, and the target search duration is a second search duration.

3. The method according to claim 1, characterized in that The step of searching for working resistance from the reference resistance low point and in the target search direction within the target search time to obtain a resistance extreme value corresponding to the target resistance includes: In response to the target resistance being the initial support force of the cycle, searching from the reference resistance low point to a subsequent time according to a first search duration to obtain a minimum working resistance value as the working resistance extreme value; In response to the target resistance being the end-of-cycle resistance, a search is performed from the reference resistance low point toward the preceding moment according to a second search duration to obtain the maximum working resistance value as the working resistance extreme value.

4. The method according to claim 3, characterized in that: The method further comprises: In response to searching for multiple minimum working resistance values ​​within the first search time, selecting the minimum working resistance value at the latest time point as the extreme working resistance value; or, In response to not finding the maximum working resistance value within the second search time period, determining that the working resistance extreme value is the resistance value corresponding to the reference resistance low point.

5. The method according to any one of claims 1 to 4, characterized in that The identifying the target resistance based on the extreme value of the working resistance to obtain the target resistance of the hydraulic support includes: In response to the target resistance being the initial support force of the cycle, starting from the extreme value of the working resistance, controlling the hydraulic support to start the current cycle of raising the frame and increasing the resistance, and searching for a candidate first resistance point when the resistance increasing speed is greater than a set speed threshold within a third search time; Determine the second resistance point that is last searched out among the candidate first resistance points; Determine the time interval from the second resistance point to the time when the hydraulic support starts to reduce resistance, wherein the time interval is the cycle duration of the current cycle; In response to the cycle duration being greater than or equal to a set time length, the resistance value corresponding to the second resistance point is determined as the cycle initial support force.

6. The method according to claim 5, characterized in that The method further comprises: In response to the cycle duration being less than the set time length, and the resistance reduction amount being greater than or equal to the set threshold, abandoning this cycle and returning to capture the next reference resistance low point; In response to the cycle duration being less than the set time length and the resistance reduction being less than the set threshold, the resistance value of the second resistance point is determined to be the cycle initial support force.

7. The method according to claim 6, characterized in that The method further comprises: In response to not finding the first resistance point within the third search time period, determining the working resistance extreme value as the cycle initial support force.

8. The method according to any one of claims 1 to 4, characterized in that The identifying the target resistance based on the extreme value of the working resistance to obtain the target resistance of the hydraulic support includes: In response to the target resistance being the end-of-cycle resistance, obtaining a historical working resistance extreme value adjacent to the working resistance extreme value; According to the magnitude relationship between the working resistance extreme value and the historical working resistance extreme value, the end-of-cycle resistance is determined from the working resistance extreme value and the historical resistance extreme value.

9. The method according to claim 8, characterized in that The step of determining the end-of-cycle resistance from the working resistance extreme value and the historical resistance extreme value according to the magnitude relationship between the working resistance extreme value and the historical resistance extreme value comprises: In response to the working resistance extreme value being greater than the historical working resistance extreme value, determining the end-of-cycle resistance as the working resistance extreme value; or, In response to the historical working resistance extreme value being greater than the working resistance extreme value, obtaining the difference between the historical resistance extreme value and the working resistance extreme value, and determining the end-of-cycle resistance to be the historical working resistance extreme value when the difference is greater than or equal to a set value; or In response to the historical working resistance extreme value being greater than the working resistance extreme value, and the difference being less than a set value, the end-of-cycle resistance is determined to be the working resistance extreme value.

10. A resistance identification device for a hydraulic support, characterized in that: The device comprises: The first determination module is used to reduce the resistance of the hydraulic support and determine the resistance value when the resistance reduction amount is greater than or equal to a set threshold value as a reference resistance low point; A second determination module is used to determine a target search direction and a target search duration according to a target resistance to be identified by the hydraulic support, wherein the target resistance is an initial cycle support force of a current cycle of the hydraulic support, or an end cycle resistance of a previous cycle of the hydraulic support; A search module, configured to search for working resistance from the reference resistance low point in the target search direction within the target search time, and obtain a working resistance extreme value corresponding to the target resistance; The identification module is used to identify the target resistance based on the extreme value of the working resistance, and obtain the target resistance of the hydraulic support.

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