Method and device for determining abutment pressure in deep coal mining face

Abstract

The present invention provides a method and device for determining the weighting of abutment pressure in a deep coal mining face. The method of the present invention uses three indicators, namely, cyclic time-weighted resistance, the proportion of the cyclic high-resistance interval, and the proportion of cyclic safety valve opening. Without changing the original strata pressure law, the index parameters with small discrimination are converted into index parameters with high discrimination, so as to achieve the purpose of truly and effectively distinguishing the periodic weighting of the deep stope. This method takes into account both the pressure of a single support and the overall pressure of the working face, and plays a guiding role in the roof safety management of the deep working face.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mining, and particularly to a method and device for determining the weighting of a deep coal mining face. Background Art

[0002] At present, the commonly used methods for determining the weighting in coal mines are roughly divided into two categories: one is based on mine pressure monitoring data, with the abscissa being the advancement or date and the ordinate being the support number of the working face. The pressure contour map drawn by software is used to visually determine the weighting; the other is based on the end resistance, maximum working resistance or weighted working resistance of the support as indicators. The pressure curves of a single support are drawn using one or more indicators, and the weighting criterion is obtained using the mean square deviation. Thus, the overall weighting of the working face is reflected by summarizing the weighting determination of a single support. The former is more suitable for shallow buried depth working faces or working faces with a large difference in weighting and non-weighting, and can clearly define the range and magnitude of the weighting; the latter has a wider applicability, but the analysis workload is large, and due to the non-synchronization of the weighting, the weighting position cannot be visually obtained, and secondary manual judgment is required after horizontal comparison of all supports.

[0003] With the gradual development of coal mines in China towards deeper depths, affected by deep high ground stress, rock creep and high-intensity mining, generally the difference between the weighting and non-weighting of the working face is low. When using the first or second type of weighting determination method, the high-pressure areas of weighting and non-weighting are intertwined or the peak differences of the pressure curves are small, and the weighting cannot be effectively determined, and the obtained conclusion has a large error. Summary of the Invention

[0004] The present invention provides a method and device for determining the weighting of a deep coal mining face to solve the defect of small difference in weighting in the existing deep mining stope and realize the safety management of the roof of the deep coal mining face.

[0005] The present invention provides a method for determining the weighting of a deep coal mining face, including:

[0006] Obtaining the resistance value sequence of each support in each coal mining cycle;

[0007] Performing weighted average on the resistance value sequence of each support in each coal mining cycle to obtain the cycle time weighted resistance of each support in each coal mining cycle;

[0008] Dividing the resistance value sequences of all supports in each coal mining cycle into intervals according to the rated resistance value and calculating the number of resistance values in the high resistance interval to obtain the proportion of the high resistance interval of the support in each coal mining cycle;

[0009] Comparing the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the safety valve opening ratio of the support in each coal mining cycle;

[0010] Based on the maximum cyclic time-weighted resistance of each support within multiple coal mining cycles, the maximum proportion of the high-resistance interval of the support within each coal mining cycle, and the maximum proportion of the support safety valve opening within each coal mining cycle, the weighting pressure law is obtained.

[0011] According to a weighting pressure determination method for a deep coal mining face provided by the present invention, the step of obtaining the weighting pressure law based on the maximum cyclic time-weighted resistance of each support within multiple coal mining cycles, the maximum proportion of the high-resistance interval of the support within each coal mining cycle, and the maximum proportion of the support safety valve opening within each coal mining cycle includes:

[0012] Establish a weighted resistance matrix based on the cyclic time-weighted resistance of each support within multiple coal mining cycles; obtain a high-resistance interval proportion matrix based on the proportion of the high-resistance interval of the support within multiple coal mining cycles; obtain a safety valve opening proportion matrix based on the support safety valve opening proportion within multiple coal mining cycles;

[0013] Based on the maximum values of the weighted resistance matrix, the high-resistance interval proportion matrix, and the safety valve opening proportion matrix, the weighting pressure law is obtained.

[0014] According to a weighting pressure determination method for a deep coal mining face provided by the present invention, the weighting pressure law includes the weighting pressure range, the weighting pressure step distance, and the weighting pressure duration length.

[0015] According to a weighting pressure determination method for a deep coal mining face provided by the present invention, the step of performing weighted averaging on the resistance value sequence of each support within each coal mining cycle to obtain the cyclic time-weighted resistance of each support within each coal mining cycle includes:

[0016] Perform weighted averaging on the curve of the resistance value sequence of each support within each coal mining cycle and time to obtain the cyclic time-weighted resistance of each support within each coal mining cycle.

[0017] According to a weighting pressure determination method for a deep coal mining face provided by the present invention, the step of dividing the resistance value sequence of all supports within each coal mining cycle according to the rated resistance value, calculating the number of resistance values within the high-resistance interval, and obtaining the proportion of the high-resistance interval of the support within each coal mining cycle includes:

[0018] Divide the resistance value sequence of all supports within each coal mining cycle into multiple intervals according to 10% of the rated resistance value, calculate the number of resistance values within the 90% rated resistance value interval, and obtain the proportion of the high-resistance interval of the support within each coal mining cycle according to the percentage of the number of resistance values within the 90% rated resistance value interval in the total number of resistance values of the resistance value sequence.

[0019] A method for determining the weighting of a deep coal mining face according to the present invention, comparing the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value, and obtaining the opening ratio of the support safety valve in each coal mining cycle, including:

[0020] Compare the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value, calculate the proportion of the number of supports with the end resistance value greater than or equal to the rated resistance value in each coal mining cycle to the total number of supports, and obtain the opening ratio of the support safety valve in each coal mining cycle.

[0021] The present invention also provides a device for determining the weighting of a deep coal mining face, including:

[0022] A pressure acquisition module for obtaining the resistance value sequence of each support in each coal mining cycle;

[0023] An index analysis module for performing weighted average on the resistance value sequence of each support in each coal mining cycle to obtain the cycle time weighted resistance of each support in each coal mining cycle; for dividing the resistance value sequences of all supports in each coal mining cycle according to the rated resistance value and calculating the number of resistance values in the high resistance interval to obtain the proportion of the high resistance interval of the support in each coal mining cycle; and also for comparing the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the opening ratio of the support safety valve in each coal mining cycle;

[0024] A weighting determination module for obtaining the weighting law according to the maximum value of the cycle time weighted resistance of each support in multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the support in each coal mining cycle, and the maximum value of the opening ratio of the support safety valve in each coal mining cycle.

[0025] A device for determining the weighting of a deep coal mining face according to the present invention, obtaining the weighting law according to the maximum value of the cycle time weighted resistance of each support in multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the support in each coal mining cycle, and the maximum value of the opening ratio of the support safety valve in each coal mining cycle, including:

[0026] Establish a weighted resistance matrix according to the cycle time weighted resistance of each support in multiple coal mining cycles; obtain a high resistance interval proportion matrix according to the proportion of the high resistance interval of the support in multiple coal mining cycles; obtain a safety valve opening ratio matrix according to the opening ratio of the support safety valve in multiple coal mining cycles;

[0027] Obtain the weighting law according to the maximum values of the weighted resistance matrix, the high resistance interval proportion matrix, and the safety valve opening ratio matrix.

[0028] A weighting apparatus for determining the pressure behavior of a deep coal mining face according to the present invention, wherein the pressure behavior includes the pressure range, the weighting step distance, and the pressure duration length.

[0029] A weighting apparatus for determining the pressure behavior of a deep coal mining face according to the present invention, wherein the weighted average of the resistance value sequences of each support in each coal mining cycle is obtained to obtain the cycle time weighted resistance of each support in each coal mining cycle, including:

[0030] The weighted average of the curve of the resistance value sequence of each support in each coal mining cycle with time is obtained to obtain the cycle time weighted resistance of each support in each coal mining cycle.

[0031] A weighting apparatus for determining the pressure behavior of a deep coal mining face according to the present invention, wherein the resistance value sequences of all supports in each coal mining cycle are divided into intervals according to the rated resistance value, and the number of resistance values in the high resistance interval is calculated to obtain the proportion of the high resistance interval of the support in each coal mining cycle, including:

[0032] The resistance value sequences of all supports in each coal mining cycle are divided into multiple intervals according to 10% of the rated resistance value, the number of resistance values in the 90% rated resistance value interval is calculated, and the proportion of the high resistance interval of the support in each coal mining cycle is obtained according to the percentage of the number of resistance values in the 90% rated resistance value interval in the total number of resistance values of the resistance value sequence.

[0033] A weighting apparatus for determining the pressure behavior of a deep coal mining face according to the present invention, wherein the end resistance value of the resistance value sequence of each support in each coal mining cycle is compared with the rated resistance value to obtain the opening ratio of the support safety valve in each coal mining cycle, including:

[0034] The end resistance value of the resistance value sequence of each support in each coal mining cycle is compared with the rated resistance value, the proportion of the number of supports with the end resistance value greater than or equal to the rated resistance value in each coal mining cycle in the total number of supports is calculated, and the opening ratio of the support safety valve in each coal mining cycle is obtained.

[0035] The present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the pressure behavior determination method for the deep coal mining face as described in any one of the above are implemented.

[0036] The present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the pressure behavior determination method for the deep coal mining face as described in any one of the above are implemented.

[0037] The present invention also provides a computer program product, including a computer program which, when executed by a processor, implements the steps of any one of the above-described methods for determining the weighting of the deep coal mining face.

[0038] The method and device for determining the weighting of the deep coal mining face provided by the present invention improve the discrimination degree of the index parameters through a weighting discrimination method of three indexes: cyclic time-weighted resistance, proportion of cyclic high-resistance interval, and proportion of cyclic safety valve opening, and solve the problems of poor applicability of the conventional weighting recognition method to deep mining fields and large recognition errors. The three index parameters adopted by the present invention can all be automatically captured and automatically analyzed through computer programming methods, meeting the requirements of automatic and accurate determination of the weighting and improving the analysis efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 is a schematic flow chart of the method for determining the weighting of the deep coal mining face provided by the embodiment of the present invention;

[0041] Figure 2 is a schematic diagram of the cyclic time-weighted resistance calculation method provided by the embodiment of the present invention;

[0042] Figure 3 is a cloud map of the cyclic time-weighted resistance provided by the embodiment of the present invention;

[0043] Figure 4 is a combined diagram of the proportion of the cyclic high-resistance interval and the proportion of the cyclic safety valve opening provided by the embodiment of the present invention;

[0044] Figure 5 is a schematic structural diagram of the device for determining the weighting of the deep coal mining face provided by the embodiment of the present invention;

[0045] Figure 6 is a schematic structural diagram of the electronic device provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] The following combines Figure 1 to describe a method for determining the weighting of a deep coal mining face, including:

[0048] Step 101: Obtain the resistance value sequence of each support in each coal mining cycle;

[0049] Step 102: Perform weighted averaging on the resistance value sequence of each support in each coal mining cycle to obtain the cycle time weighted resistance of each support in each coal mining cycle;

[0050] Divide the resistance value sequences of all supports in each coal mining cycle according to the rated resistance value and calculate the number of resistance values in the high resistance interval to obtain the proportion of the high resistance interval of the support in each coal mining cycle;

[0051] Compare the final resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the opening ratio of the support safety valve in each coal mining cycle;

[0052] Step 103: Obtain the weighting law according to the maximum value of the cycle time weighted resistance of each support in multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the support in each coal mining cycle, and the maximum value of the opening ratio of the support safety valve in each coal mining cycle.

[0053] In the embodiments of the present invention, in order to solve the problem of small differentiation degree of abutment pressure in deep stope, three indicators, namely cyclic time-weighted resistance, proportion of high-resistance interval in a cycle, and proportion of safety valve opening in a cycle, are adopted. Without changing the original abutment pressure law, the index parameters with small differentiation degree are converted into index parameters with high differentiation degree, so as to achieve the purpose of truly and effectively differentiating the abutment pressure in deep stope. This method takes into account both the pressure of a single support and the overall pressure of the working face, and plays a guiding role in the roof safety management of deep working face. The method in the embodiments of the present invention finds the key determination indicators with large differentiation degree of periodic abutment pressure in deep working face. The cyclic time-weighted resistance converts a number of abutment pressure data within a coal mining cycle of a single support into a value, simplifying the complex data and using it to replace the end-of-cycle resistance or maximum working resistance to distinguish between abutment pressure and non-abutment pressure, increasing the differentiation degree; the proportion of high-resistance interval in a cycle converts the complex abutment pressure data of the entire working face within a single cycle into a value, differentiating between abutment pressure and non-abutment pressure from the perspective of overall abutment pressure; the proportion of safety valve opening in a cycle is similar to the proportion of high-resistance interval in a cycle in terms of characteristics, and both can characterize the contrast of abutment pressure strength between abutment pressure and non-abutment pressure.

[0054] It should be noted that in the embodiments of the present invention, the coal mining cycle refers to the cyclic coal cutting time, and the support refers to the structure for controlling the abutment pressure of the coal mining face. Generally, it can also be understood that the resistance value sequence refers to the abutment pressure data of the deep coal mining face for a certain period, where the resistance values are divided by the advance or time, and the abutment pressure includes the first abutment pressure and the periodic abutment pressure. In this embodiment, the operation software runs based on a mine pressure monitoring system (such as the KJ21 mine pressure monitoring system), and uses the operation software to divide the abutment pressure data for a certain period into several cycles in units of cyclic coal cutting time to obtain cyclic abutment pressure data.

[0055] It should be noted that the maximum value of the cyclic time-weighted resistance of each support within multiple coal mining cycles is actually an interval containing the maximum value, and all the cyclic time-weighted resistances within this interval are related to the abutment pressure law.

[0056] In at least one embodiment of the present invention, obtaining the abutment pressure law according to the maximum value of the cyclic time-weighted resistance of each support within multiple coal mining cycles, the maximum value of the proportion of the high-resistance interval of the support within each coal mining cycle, and the maximum value of the safety valve opening proportion of the support within each coal mining cycle includes:

[0057] Establishing a weighted resistance matrix according to the cyclic time-weighted resistance of each support within multiple coal mining cycles; obtaining a high-resistance interval proportion matrix according to the proportion of the high-resistance interval of the support within multiple coal mining cycles; obtaining a safety valve opening proportion matrix according to the safety valve opening proportion of the support within multiple coal mining cycles;

[0058] According to the maximum values of the weighted resistance matrix, the high-resistance interval proportion matrix, and the safety valve opening proportion matrix, the weighting law is obtained. Among them, each maximum value area represents a periodic weighting, and the number of cycles between two adjacent maximum values * the cutting depth is the weighting step distance of the periodic weighting.

[0059] It should be noted that the following method is adopted to obtain the weighting law according to the maximum values of the weighted resistance matrix, the high-resistance interval proportion matrix, and the safety valve opening proportion matrix:

[0060] Step 201: Taking the supports of the 1st, 2nd, …, m groups as the vertical coordinates, and taking 1, 2, …, n cycle sequences (or advancement degrees) as the horizontal coordinates, and using the corresponding weighted resistance matrix as the basic data. Within the same coal mining cycle, for the pressure curve of each support, the cycle time weighted resistance is plotted into a plane cloud diagram by using suffer software, as Figure 3 shown;

[0061] Step 202: Taking the cycle sequence or advancement degree as the horizontal coordinate, and taking the high-resistance interval proportion matrix and the safety valve opening proportion matrix as the vertical coordinates, and using the origin or Excel mapping method, the cycle high-resistance interval proportion histogram and the cycle safety valve opening proportion curve diagram are obtained, as Figure 4 shown.

[0062] Step 203: Based on Figure 3 and Figure 4 , taking the high-stress area and high percentage as the criteria, information such as the range of periodic weighting, the weighting step distance, and the weighting duration length can be comprehensively and quickly determined. Figure 3 The high-stress area in Figure 4 represents the weighting range and the weighting duration length, and the distance between two adjacent high-stress areas is the weighting step distance of the periodic weighting;

[0063] It should be noted that the mapping methods listed in the present invention are only relatively common mapping methods, and similar mapping methods, such as the three-dimensional wireframe diagram method, can also be used for the data processing of the present invention.

[0064] Based on the analysis of three index parameters, the present invention embodiment proposes to adopt cloud diagrams, histograms, and curves Figure 3 as three display methods, without changing the original characteristics of the mine pressure law, and making the periodic weighting law of the deep stope clear and intuitive. By adopting the mapping method of combining the mine pressure cloud diagram with the curve diagram and the histogram, the line and the surface are combined, and the weighting characteristics can be displayed from both the dip and the strike of the working face, and the original mine pressure law is not changed. By adopting the computer programming method, the automatic and accurate analysis of the index parameters is realized, and by adopting the computer mapping method, the automatic display of the cloud diagram, the histogram, and the curve diagram is realized, improving the determination efficiency of the periodic weighting of the deep working face.

[0065] In at least one embodiment of the present invention, the step of obtaining the cycle time weighted resistance of each support in each coal mining cycle by weighted averaging the resistance value sequence of each support in each coal mining cycle includes:

[0066] Performing weighted averaging on the curve of the resistance value sequence of each support in each coal mining cycle with respect to time to obtain the cycle time weighted resistance of each support in each coal mining cycle.

[0067] It should be noted that the weighted resistance matrix is obtained by the following method:

[0068] As Figure 2 shown, it is a schematic diagram of the calculation method for taking time weighting of the working resistance in two coal mining cycles. The embodiment of the present invention proposes a calculation formula for cycle time weighted resistance based on the calculus theory. As can be seen from Figure 2 , when the resistance P n at the end of two cycles and the maximum working resistance are the same, it can be concluded from Equation 1 that P t2 >P t1 . If the resistance at the end of the cycle and the maximum working resistance are used as the basis, the conclusion that P t2 =P t1 will be drawn. Therefore, the weighted resistance calculation method proposed by the present invention is closer to the actual application environment.

[0069] Converting all the working resistance values within the cycle into a single value of cycle time weighted resistance P t as shown in Equation 1:

[0070]

[0071] Among them, converting the first set of cyclic strata pressure data (i.e., the sequence of strata pressure values) P 1 , P 2 , …, P n of the first support into the cycle time weighted working resistance P 11 ; converting the first set of cyclic strata pressure data P 1 , P 2 , …, P n of the second support into the cycle time weighted working resistance P 21 ; converting the first set of cyclic strata pressure data P 1 , P 2 , …, P n of the m-th support into the cycle time weighted working resistance P m1 , thus obtaining the time weighted resistance {P 11 , P 21 , …, P m1 of all supports in the first cycle}. Similarly, after calculating and converting the cyclic mine pressure data of all the supports in all the mining cycles into cyclic time-weighted working resistances, a data matrix is obtained:

[0072]

[0073] In at least one embodiment of the present invention, the step of dividing the resistance value sequence of all the supports in each mining cycle into intervals according to the rated resistance value and calculating the number of resistance values in the high-resistance interval to obtain the proportion of the high-resistance interval of the supports in each mining cycle includes:

[0074] In at least one embodiment of the present invention, the resistance value sequence of all the supports in each mining cycle is divided into multiple intervals according to 10% of the rated resistance value, the number of resistance values in the 90% rated resistance value interval is calculated, and according to the percentage of the number of resistance values in the 90% rated resistance value interval in the total number of resistance values of the resistance value sequence, the proportion of the high-resistance interval of the supports in each mining cycle is obtained. Using 10%P e as the high-resistance interval divided by the interval has relatively high discrimination.

[0075] It should be noted that the high-resistance interval proportion matrix is obtained by the following method:

[0076] Obtain the mine pressure data of all the supports in the first cycle, denoted as t 0 ones. Using 10%P e as the dividing interval and P e as the rated resistance of the support, count the number of working resistances falling in each interval. If the number of resistances in the interval ≥ 90%P e is t 1 , then use (t 1 / t 0 ×100%) as the proportion of the high-resistance interval in the first cycle, denoted as t 10 ; similarly, count up to the kth group of cyclic mine pressure data, denoted as t k0 ; obtain the data matrix:

[0077] [t 10 t 20 … t k0 .

[0078] In at least one embodiment of the present invention, the step of comparing the final resistance value of the resistance value sequence of each support in each mining cycle with the rated resistance value to obtain the safety valve opening ratio of the support in each mining cycle includes:

[0079] Compare the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value, calculate the proportion of the number of supports with the end resistance value greater than or equal to the rated resistance value in the total number of supports in each coal mining cycle, and obtain the opening proportion of the support safety valve in each coal mining cycle. The safety valve opening criterion in the embodiment of the present invention is proposed based on the basic requirements of exerting the maximum support efficiency of the support and protecting the structural members of the support.

[0080] It should be noted that the safety valve opening proportion matrix is obtained by the following method:

[0081] Taking the end resistance P of the support cycle n ≥P e as the criterion for the opening of the safety valve, using the data traversal method for computer programming, compare the first set of cyclic mine pressure data P of the first support 1 、P 2 、…、P n with P e traversally. If P i (i = 1, 2, …, n)≥P e , it is recorded as 1, otherwise, it is recorded as 0; similarly, compare the first set of cyclic mine pressure data P of the second support 1 、P 2 、…、P n with P e traversally. If P i (i = 1, 2, …, n)≥P e , it is recorded as 1, otherwise, it is recorded as 0; after traversing the cyclic mine pressure data of the mth group of supports in turn, sum the obtained results and record it as l; then take (l / m×100%) as the safety valve opening proportion of the first cycle, denoted as A 10 ; similarly, count up to the kth group of cyclic mine pressure data, denoted as A k0 ; obtain the data matrix:

[0082] [A 10 A 20 … A k0 .

[0083] In at least one embodiment of the present invention, the weighting law includes the weighting range, the weighting step distance, and the weighting duration length.

[0084] Next, the weighting determination device for the deep coal mining face provided by the present invention will be described. The weighting determination device for the deep coal mining face described below can be correspondingly referred to the weighting determination method for the deep coal mining face described above. As Figure 5 shown in the weighting determination device for the deep coal mining face, it includes:

[0085] A pressure acquisition module 501, configured to obtain the resistance value sequence of each support in each coal mining cycle;

[0086] The index analysis module 502 is configured to perform weighted averaging on the resistance value sequences of each support within each coal mining cycle to obtain the cycle time weighted resistance of each support within each coal mining cycle; to divide the resistance value sequences of all supports within each coal mining cycle into intervals according to the rated resistance value and calculate the number of resistance values within the high resistance interval, so as to obtain the proportion of the high resistance interval of the support within each coal mining cycle; and is further configured to compare the final resistance value of the resistance value sequence of each support within each coal mining cycle with the rated resistance value to obtain the safety valve opening ratio of the support within each coal mining cycle.

[0087] The weighting determination module 503 is configured to obtain the weighting rule according to the maximum value of the cycle time weighted resistance of each support within multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the support within each coal mining cycle, and the maximum value of the safety valve opening ratio of the support within each coal mining cycle.

[0088] In at least one embodiment of the present invention, the index analysis module 502 obtains the weighting rule according to the maximum value of the cycle time weighted resistance of each support within multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the support within each coal mining cycle, and the maximum value of the safety valve opening ratio of the support within each coal mining cycle, including:

[0089] Establish a weighted resistance matrix according to the cycle time weighted resistance of each support within multiple coal mining cycles; obtain a high resistance interval proportion matrix according to the proportion of the high resistance interval of the support within multiple coal mining cycles; obtain a safety valve opening ratio matrix according to the safety valve opening ratio of the support within multiple coal mining cycles.

[0090] Obtain the weighting rule according to the maximum values of the weighted resistance matrix, the high resistance interval proportion matrix, and the safety valve opening ratio matrix.

[0091] In at least one embodiment of the present invention, the weighting rule includes the weighting range, the weighting step distance, and the weighting duration length.

[0092] In at least one embodiment of the present invention, performing weighted averaging on the resistance value sequences of each support within each coal mining cycle to obtain the cycle time weighted resistance of each support within each coal mining cycle includes:

[0093] Perform weighted averaging on the curve of the resistance value sequence of each support within each coal mining cycle and the advancement to obtain the cycle time weighted resistance of each support within each coal mining cycle.

[0094] In at least one embodiment of the present invention, for the resistance value sequence of all supports in each coal mining cycle, dividing intervals according to the rated resistance value and calculating the number of resistance values in the high resistance interval, and obtaining the proportion of the high resistance interval of the supports in each coal mining cycle, includes:

[0095] Dividing the resistance value sequence of all supports in each coal mining cycle into multiple intervals according to 10% of the rated resistance value, calculating the number of resistance values in the 90% rated resistance value interval, and obtaining the proportion of the high resistance interval of the supports in each coal mining cycle according to the percentage of the number of resistance values in the 90% rated resistance value interval in the total number of resistance values of the resistance value sequence.

[0096] In at least one embodiment of the present invention, comparing the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value, and obtaining the opening ratio of the support safety valve in each coal mining cycle, includes:

[0097] Comparing the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value, calculating the proportion of the number of supports with the end resistance value greater than or equal to the rated resistance value in each coal mining cycle in the total number of supports, and obtaining the opening ratio of the support safety valve in each coal mining cycle.

[0098] It should be noted that in the embodiments of the present invention, the three indicators of cyclic time weighted resistance, cyclic high resistance interval proportion, and cyclic safety valve opening ratio can be used as the determination indicators for the periodic weighting of the deep working face respectively, or the three indicators can be arbitrarily combined, or parameters similar to the cyclic resistance increase rate with the same effect can be combined as the determination indicators for determination.

[0099] Figure 6 An example of the physical structure diagram of an electronic device is shown as Figure 6 shown. The electronic device may include: a processor 610, a communication interface 620, a memory 630, and a communication bus 640. Among them, the processor 610, the communication interface 620, and the memory 630 communicate with each other through the communication bus 640. The processor 610 can call the logical instructions in the memory 630 to execute the weighting determination method for the weighting of the deep coal mining working face, and the method includes:

[0100] Obtaining the resistance value sequence of each support in each coal mining cycle;

[0101] Performing weighted average on the resistance value sequence of each support in each coal mining cycle to obtain the cyclic time weighted resistance of each support in each coal mining cycle;

[0102] Divide the resistance value sequences of all supports in each coal mining cycle into intervals according to the rated resistance value, calculate the number of resistance values in the high-resistance interval, and obtain the proportion of the high-resistance interval of the supports in each coal mining cycle;

[0103] Compare the final resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the opening ratio of the support safety valve in each coal mining cycle;

[0104] Based on the cycle time weighted resistance maximum value of each support in multiple coal mining cycles, the maximum value of the proportion of the high-resistance interval of the supports in each coal mining cycle, and the maximum value of the opening ratio of the support safety valve in each coal mining cycle, obtain the weighting law.

[0105] In addition, when the logical instructions in the above-mentioned memory 630 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0106] On the other hand, the present invention also provides a computer program product, the computer program product includes a computer program, the computer program can be stored on a non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the computer can execute the weighting determination method for the weighting of the deep coal mining face provided by the above-mentioned various methods. The method includes:

[0107] Obtain the resistance value sequence of each support in each coal mining cycle;

[0108] Perform weighted average on the resistance value sequences of each support in each coal mining cycle to obtain the cycle time weighted resistance of each support in each coal mining cycle;

[0109] Divide the resistance value sequences of all supports in each coal mining cycle into intervals according to the rated resistance value, calculate the number of resistance values in the high-resistance interval, and obtain the proportion of the high-resistance interval of the supports in each coal mining cycle;

[0110] Compare the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the opening ratio of the support safety valve in each coal mining cycle;

[0111] Obtain the weighting law according to the maximum value of the cycle time weighted resistance of each support in multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the support in each coal mining cycle, and the maximum value of the opening ratio of the support safety valve in each coal mining cycle.

[0112] On the other hand, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it realizes the weighting determination method for the weighting of the deep coal mining face provided by the above-mentioned various methods. The method includes:

[0113] Obtain the resistance value sequence of each support in each coal mining cycle;

[0114] Perform weighted average on the resistance value sequence of each support in each coal mining cycle to obtain the cycle time weighted resistance of each support in each coal mining cycle;

[0115] Divide the resistance value sequences of all supports in each coal mining cycle according to the rated resistance value and calculate the number of resistance values in the high resistance interval to obtain the proportion of the high resistance interval of the support in each coal mining cycle;

[0116] Compare the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the opening ratio of the support safety valve in each coal mining cycle;

[0117] Obtain the weighting law according to the maximum value of the cycle time weighted resistance of each support in multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the support in each coal mining cycle, and the maximum value of the opening ratio of the support safety valve in each coal mining cycle.

[0118] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement without creative labor.

[0119] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the abutment pressure in a deep coal mining face, characterized in that, it includes: Obtain the resistance value sequence of each support within each coal mining cycle; Perform weighted averaging on the resistance value sequence of each support within each coal mining cycle to obtain the cycle time weighted resistance of each support within each coal mining cycle; Divide the resistance value sequences of all supports within each coal mining cycle according to the rated resistance value, calculate the number of resistance values in the high resistance interval, and obtain the proportion of the high resistance interval of the supports within each coal mining cycle; Compare the final resistance value of the resistance value sequence of each support within each coal mining cycle with the rated resistance value to obtain the opening ratio of the support safety valve within each coal mining cycle; Obtain the abutment pressure law based on the maximum value of the cycle time weighted resistance of each support within multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the supports within each coal mining cycle, and the maximum value of the opening ratio of the support safety valve within each coal mining cycle; Among them, the step of obtaining the abutment pressure law based on the maximum value of the cycle time weighted resistance of each support within multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the supports within each coal mining cycle, and the maximum value of the opening ratio of the support safety valve within each coal mining cycle includes: Establish a weighted resistance matrix based on the cycle time weighted resistance of each support within multiple coal mining cycles; obtain a high resistance interval proportion matrix based on the proportion of the high resistance interval of the supports within multiple coal mining cycles; obtain a safety valve opening ratio matrix based on the opening ratio of the support safety valve within multiple coal mining cycles; Obtain the abutment pressure law based on the maximum values of the weighted resistance matrix, the high resistance interval proportion matrix, and the safety valve opening ratio matrix; The weighted resistance matrix is obtained by the following method: converting all the working resistance values within the cycle into a cycle time weighted resistance P t a value, as shown in Equation 1: Among them, the first set of cyclic strata pressure data (i.e., the sequence of strata pressure values) P of the first support 1 , P 2 , …, P n are calculated and transformed into the cyclic time weighted working resistance P 11 ; the first set of cyclic strata pressure data P of the second support 1 , P 2 , …, P n are calculated and transformed into the cyclic time weighted working resistance P 21 ; the first set of cyclic strata pressure data P of the m-th support 1 , P 2 , …, P n are calculated and transformed into the cyclic time weighted working resistance P m1 , and thus the time weighted resistances of all supports in the first cycle {P 11 , P 21 , …, P m1} are obtained; similarly, after calculating and transforming the k sets of cyclic strata pressure data of all supports into the cyclic time weighted working resistance, a data matrix is obtained: The high resistance interval proportion matrix is obtained by the following method: Obtain the strata pressure data of all supports in the first cycle, denoted as t 0 ones, with 10%P e as the interval division, P e being the rated resistance of the support, count the number of working resistances falling within each interval. If the number of resistances in the interval ≥ 90%P e is t 1 , then take (t 1 / t 0 ×100%) as the proportion of the high resistance interval in the first cycle, denoted as t 10 ; Similarly, count the strata pressure data of the k-th group of cycles, denoted as t k0 ; Obtain the data matrix [t 10 t 20 …t k0 ; The safety valve opening ratio matrix is obtained by the following method: Taking the final resistance P of the support cycle n ≥P e As the criterion for the safety valve to open, the data traversal method is used for computer programming. The first set of cyclic mine pressure data P of the first support 1 、P 2 、…、P n are traversed and compared with P e . If P i (i = 1, 2, …, n) ≥ P e , it is recorded as 1, otherwise, it is recorded as 0; similarly, the first set of cyclic mine pressure data P of the second support 1 、P 2 、…、P n are traversed and compared with P e . If P i (i = 1, 2, …, n) ≥ P e , it is recorded as 1, otherwise, it is recorded as 0; after traversing the cyclic mine pressure data of the mth group of supports in turn, the obtained results are summed and recorded as l; then, (l / m × 100%) is used as the opening ratio of the safety valve in the first cycle and recorded as A 10 ; similarly, when counting the cyclic mine pressure data of the kth group, it is recorded as A k0 ; the data matrix is obtained: [A 10 A 20 …A k0 。 2. The method for determining the abutment pressure in a deep coal mining face according to claim 1, characterized in that, The abutment pressure law includes the abutment pressure range, the abutment pressure step distance, and the abutment pressure duration length.

3. The method for determining the abutment pressure in a deep coal mining face according to claim 1, characterized in that, The step of performing weighted averaging on the resistance value sequence of each support within each coal mining cycle to obtain the cycle time weighted resistance of each support within each coal mining cycle includes: Perform weighted averaging on the curve of the resistance value sequence of each support within each coal mining cycle and time to obtain the cycle time weighted resistance of each support within each coal mining cycle.

4. The method for determining the abutment pressure in a deep coal mining face according to claim 1, characterized in that, The step of dividing the resistance value sequences of all supports within each coal mining cycle according to the rated resistance value, calculating the number of resistance values in the high resistance interval, and obtaining the proportion of the high resistance interval of the supports within each coal mining cycle includes: Divide the resistance value sequences of all supports within each coal mining cycle into multiple intervals according to 10% of the rated resistance value, calculate the number of resistance values in the 90% rated resistance value interval, and obtain the proportion of the high resistance interval of the supports within each coal mining cycle according to the percentage of the number of resistance values in the 90% rated resistance value interval to the total number of resistance values in the resistance value sequence.

5. The method for determining the abutment pressure in a deep coal mining face according to claim 1, characterized in that, Comparing the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the opening ratio of the support safety valve in each coal mining cycle, including: Comparing the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value, calculating the proportion of the number of supports with the end resistance value greater than or equal to the rated resistance value in the total number of supports in each coal mining cycle, and obtaining the opening ratio of the support safety valve in each coal mining cycle.

6. A weighting determination device for the pressure behavior in a deep coal mining face Characterized in that It includes: A pressure acquisition module for obtaining the resistance value sequence of each support in each coal mining cycle; An index analysis module for performing weighted averaging on the resistance value sequence of each support in each coal mining cycle to obtain the cycle time weighted resistance of each support in each coal mining cycle; for dividing the resistance value sequences of all supports in each coal mining cycle according to the rated resistance value and calculating the number of resistance values in the high resistance interval to obtain the proportion of the high resistance interval of the support in each coal mining cycle; It is also used to compare the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the opening ratio of the support safety valve in each coal mining cycle; A weighting determination module for obtaining the weighting rule according to the maximum value of the cycle time weighted resistance of each support in multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the support in each coal mining cycle, and the maximum value of the opening ratio of the support safety valve in each coal mining cycle; Among them, obtaining the weighting rule according to the maximum value of the cycle time weighted resistance of each support in multiple coal mining cycles, the maximum value of the proportion of the high resistance interval of the support in each coal mining cycle, and the maximum value of the opening ratio of the support safety valve in each coal mining cycle includes: Establishing a weighted resistance matrix according to the cycle time weighted resistance of each support in multiple coal mining cycles; obtaining a high resistance interval proportion matrix according to the proportion of the high resistance interval of the support in multiple coal mining cycles; obtaining a safety valve opening ratio matrix according to the opening ratio of the support safety valve in multiple coal mining cycles; Obtaining the weighting rule according to the maximum values of the weighted resistance matrix, the high resistance interval proportion matrix, and the safety valve opening ratio matrix; The weighted resistance matrix is obtained by the following method: converting all working resistance values within the cycle into a cycle time-weighted resistance P t a value, as shown in Equation 1: Among them, the first set of cyclic abutment pressure data (i.e., the abutment pressure value sequence) P of the first support 1 , P 2 , …, P n are calculated and converted into the cyclic time-weighted working resistance P 11 ; the first set of cyclic abutment pressure data P of the second support 1 , P 2 , …, P n are calculated and converted into the cyclic time-weighted working resistance P 21 ; the first set of cyclic abutment pressure data P of the m-th support 1 , P 2 , …, P n are calculated and converted into the cyclic time-weighted working resistance P m1 , and thus the time-weighted resistances of all supports in the first cycle {P 11 , P 21 , …, P m1} are obtained; similarly, after calculating and converting the k sets of cyclic abutment pressure data of all supports into the cyclic time-weighted working resistance, a data matrix is obtained: The high resistance interval proportion matrix is obtained by the following method: Obtain the mine pressure data of all supports in the first cycle, denoted as t 0 ones, with 10%P e as the dividing interval, P e being the rated resistance of the support, count the number of working resistances falling within each interval. If the number of resistances in the interval ≥ 90%P e is t 1 , then take (t 1 / t 0 ×100%) as the proportion of the high resistance interval in the first cycle, denoted as t 10 ; Similarly, count the mine pressure data of the k-th group of cycles, denoted as t k0 ; Obtain the data matrix [t 10 t 20 …t k0 ; The safety valve opening ratio matrix is obtained by the following method: Taking the end resistance P of the support cycle n ≥P e As the criterion for the safety valve to open, the data traversal method is used for computer programming. The first set of cyclic mine pressure data P of the first support 1 、P 2 、…、P n are traversed and compared with P e . If P i (i = 1, 2, …, n) ≥ P e , it is recorded as 1; otherwise, it is recorded as 0. Similarly, the first set of cyclic mine pressure data P of the second support 1 、P 2 、…、P n are traversed and compared with P e . If P i (i = 1, 2, …, n) ≥ P e , it is recorded as 1; otherwise, it is recorded as 0. After traversing the cyclic mine pressure data of the mth group of supports in turn, the obtained results are summed and recorded as l. Then, (l / m × 100%) is used as the opening ratio of the safety valve in the first cycle, recorded as A 10 ; similarly, when counting the kth group of cyclic mine pressure data, it is recorded as A k0 ; the data matrix is obtained: [A 10 A 20 …A k0 。 7. The weighting determination device for the pressure behavior in a deep coal mining face according to claim 6, Characterized in that The weighting rule includes the weighting range, the weighting step distance, and the weighting duration length.

8. The weighting determination device for the pressure behavior in a deep coal mining face according to claim 6, Characterized in that Performing weighted averaging on the resistance value sequence of each support in each coal mining cycle to obtain the cycle time weighted resistance of each support in each coal mining cycle, including: Performing weighted averaging on the curve of the resistance value sequence of each support in each coal mining cycle with respect to time to obtain the cycle time weighted resistance of each support in each coal mining cycle.

9. The weighting determination device for the pressure behavior in a deep coal mining face according to claim 6, Characterized in that Dividing the resistance value sequence of all supports in each coal mining cycle into intervals according to the rated resistance value and calculating the number of resistance values in the high resistance interval, and obtaining the proportion of the high resistance interval of the supports in each coal mining cycle, including: Dividing the resistance value sequence of all supports in each coal mining cycle into multiple intervals according to 10% of the rated resistance value, calculating the number of resistance values in the 90% rated resistance value interval, and obtaining the proportion of the high resistance interval of the supports in each coal mining cycle according to the percentage of the number of resistance values in the 90% rated resistance value interval in the total number of resistance values of the resistance value sequence.

10. The weighting determination device for the pressure behavior in the deep coal mining face according to claim 6, wherein, Comparing the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the safety valve opening ratio of the supports in each coal mining cycle, including: Comparing the end resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value, calculating the proportion of the number of supports with the end resistance value greater than or equal to the rated resistance value in each coal mining cycle in the total number of supports, and obtaining the safety valve opening ratio of the supports in each coal mining cycle.

11. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, When the processor executes the program, the steps of the weighting determination method for the pressure behavior in the deep coal mining face according to any one of claims 1 to 5 are implemented.

12. A non-transitory computer-readable storage medium, on which a computer program is stored, wherein, When the computer program is executed by a processor, the steps of the weighting determination method for the pressure behavior in the deep coal mining face according to any one of claims 1 to 5 are implemented.

13. A computer program product, comprising a computer program, wherein, When the computer program is executed by a processor, the steps of the weighting determination method for the pressure behavior in the deep coal mining face according to any one of claims 1 to 5 are implemented.

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