CN111681125B - Top plate pressure calculation method, storage medium, and electronic apparatus - Google Patents
Top plate pressure calculation method, storage medium, and electronic apparatus Download PDFInfo
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Abstract
The application discloses a roof pressure calculation method, a storage medium and an electronic device, which comprise the following steps: screening out the maximum support load value and the corresponding key time point of each hydraulic support; determining a coal mining circulation process according to the maximum support load and the key time point; and calculating the roof pressure by using the hydraulic support circulation end resistance in the coal mining circulation process. By means of the method and the device, mining pressure data which are generated due to poor working conditions of the hydraulic support and manual misoperation and cannot reflect the movement rule of the top plate can be reduced, calculation results are more accurate, the mining pressure rule of the top plate can be summarized comprehensively and accurately, the analysis automation level of the mining pressure data is improved, labor input is reduced, and further coal mining safety is guaranteed.
Description
Technical Field
The application relates to the technical field of coal mines, in particular to a roof pressure calculation method, a storage medium and electronic equipment.
Background
The method is characterized in that the monitoring and early warning of the mine pressure are effective means for effectively preventing and controlling the disaster of the roof, and the calculation of the roof running step distance is a key link for analyzing the activity rule of the roof and developing the early warning of the mine pressure.
At present, the top plate pressing step distance is mainly calculated by a single hydraulic support, and because the geology and exploitation conditions of a fully mechanized working face are very complex, the phenomena of uneven top plate and bottom plate, liquid leakage or other adverse phenomena occur, and the working resistance of part of the hydraulic supports cannot fully reflect the sinking movement characteristics of the top plate, so that the top plate pressure calculated by the method is not accurate enough, and the danger coefficient of coal mining is increased.
Disclosure of Invention
In view of the above, the present application proposes a top plate pressure calculating method, a storage medium and an electronic device to solve the above technical problems.
The application provides a top plate pressure calculation method, which comprises the following steps: screening out the maximum support load value and the corresponding key time point of each hydraulic support; determining a coal mining circulation process according to the maximum support load and the key time point; and calculating the top plate pressure by using the hydraulic support circulation end resistance in the coal mining circulation process.
Optionally, screening the maximum bracket load of each hydraulic bracket and the corresponding key time point includes: collecting the working resistance of the hydraulic support on the whole working surface in real time, taking time as an abscissa, taking the working resistance of the hydraulic support as an ordinate, and drawing a time sequence curve of the hydraulic support; calculating the difference value of the working resistance of each adjacent hydraulic support according to the hydraulic support time sequence curve; comparing the difference value with a first preset threshold value, determining a maximum bracket load according to a comparison result, and determining a time point corresponding to the maximum bracket load as a corresponding key time point.
Optionally, comparing the difference value with a first preset threshold, determining a maximum bracket load according to a comparison result, and determining a time point corresponding to the maximum bracket load as a corresponding key time point includes: if the difference value of the hydraulic support working resistance at the current time point and the next time point is smaller than a first preset threshold value, filtering the hydraulic support working resistance at the current time point; if the hydraulic support working resistance difference value is larger than or equal to the first preset threshold value, the maximum hydraulic support working resistance value in a preset historical time period is screened out according to a hydraulic support time sequence curve, the maximum hydraulic support working resistance value is determined to be the maximum support load value, and the corresponding time point is determined to be the corresponding key time point.
Optionally, determining the coal mining cycle based on the maximum bracket load and the key time point includes: calculating a judging section of each coal mining cycle process according to the key time point set of each hydraulic support; and if the proportion of the number of the key time points in the judging section to the total number in the key time point set is larger than the second preset threshold value, judging the judging section as a coal mining circulation process.
Optionally, calculating the decision interval of each coal mining cycle process according to the key time point set of each hydraulic support includes: determining key time points of each hydraulic support in each resistance reducing action, and constructing a key time point set; calculating an average value of key time points in the key time point set, and determining the average value as an average time point; and calculating the inter-zone end points of the judging zone according to the key time points and the average time points.
Optionally, calculating the interval endpoint of the decision interval according to the key time point and the average time point includes: determining a key time point greater than or equal to the average time point as a first key time point, and determining a key time point less than the average time point as a second key time point; calculating a left interval endpoint of the judgment interval by using the first key time point and the first calculation formula; and calculating the right interval endpoint of the judgment interval by using the second key time point and a second calculation formula.
Optionally, the first calculation formula and the second calculation formula are:
wherein T1 is the left interval endpoint, T2 is the right interval endpoint, T ij Generating a key time point corresponding to the maximum bracket load value when the jth resistance reducing action is generated for the ith hydraulic bracket, when +.>
At time t ij For the first key time point, when +.>
At time t ij Is the second key point in time; />
Is the average time point; />
Is the average value of the difference between the first key time point or the second key time point and the average time point.
Optionally, calculating the roof pressure using hydraulic support end-of-cycle resistance during the coal mining cycle comprises: determining a key time point in the judging section as a target key time point, and determining the working resistance of the hydraulic support corresponding to the target key time point as the circulation end resistance; the average of the end-of-cycle resistances is calculated and determined as the roof pressure during the coal mining cycle.
The present application also provides a non-volatile computer storage medium storing computer-executable instructions configured for a roof pressure calculation method as described above.
The application also provides an electronic device comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the ceiling pressure calculation method as described above.
The method for calculating the roof pressure screens the maximum support load of each hydraulic support and the corresponding key time point; then determining the coal mining circulation process according to the screened maximum support load value and the key time point; and the hydraulic support circulation end resistance in the coal mining circulation process is utilized to calculate the roof pressure, and the maximum support load and the key time point are subjected to screening treatment, so that the mine pressure data which cannot respond to the roof movement rule and are generated due to the poor working condition of the hydraulic support and manual misoperation can be reduced, the calculation result is more accurate, the comprehensive and accurate summary of the roof mine pressure rule is facilitated, the analysis automation level of the mine pressure data is improved, the manpower input is reduced, and the safety of coal mining is further ensured.
Drawings
Fig. 1 is a flow chart of a method of calculating a top plate pressure according to an embodiment of the present application.
Fig. 2 is a flow chart of a method for calculating a top plate pressure according to another embodiment of the present application.
Fig. 3 is a schematic diagram of a timing diagram of a hydraulic mount of the present application.
Fig. 4 is a schematic structural view of a top plate pressure calculation device according to an embodiment of the present application.
Fig. 5 is a schematic structural view of a top plate pressure calculation device according to an embodiment of the present application.
Detailed Description
The following describes the technical scheme of the present application in detail with reference to the accompanying drawings and specific embodiments. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
Fig. 1 shows a flowchart of a roof pressure calculation method of the present application, and as shown in fig. 1, the roof pressure calculation method provided in the present application may be applicable to calculation of a roof pressure with a fully-mechanized mining face, and the method includes:
and S101, screening out the maximum bracket load value of each hydraulic bracket and the corresponding key time point.
The execution body in this embodiment may be a device and apparatus for determining and identifying a coal mining cycle process and calculating a fully-mechanized mining face roof pressure during the coal mining cycle process.
S102, determining the coal mining circulation process according to the maximum support load and the key time point.
For the embodiment, which resistance reduction belongs to the frame moving action and the coal mining cycle can be judged according to the maximum value of the support load and the key time point, so that the resistance reduction process caused by non-frame moving is filtered, the correct cycle end resistance and the correct corresponding moment in the coal mining cycle process are identified, and the top plate pressure is accurately calculated.
S103, calculating the roof pressure by using the hydraulic support circulation end resistance in the coal mining circulation process.
For this embodiment, the identified hydraulic bracket cycle end resistance average may be taken as the full face mine pressure, i.e., roof pressure.
The method for calculating the roof pressure screens the maximum support load of each hydraulic support and the corresponding key time point; then determining the coal mining circulation process according to the screened maximum support load value and the key time point; and the hydraulic support circulation end resistance in the coal mining circulation process is utilized to calculate the roof pressure, and the maximum support load and the key time point are subjected to screening treatment, so that the mine pressure data which cannot respond to the roof movement rule and are generated due to the poor working condition of the hydraulic support and manual misoperation can be reduced, the calculation result is more accurate, the comprehensive and accurate summary of the roof mine pressure rule is facilitated, the analysis automation level of the mine pressure data is improved, the manpower input is reduced, and the safety of coal mining is further ensured.
Further, as a refinement and extension of the specific implementation manner of the foregoing embodiment, in order to fully explain the specific implementation process in this embodiment, another method for calculating the roof pressure of the fully-mechanized coal mining face is provided, as shown in fig. 2, and the method includes:
s201, collecting working resistance of the hydraulic support on the full working face in real time, and drawing a hydraulic support time sequence curve by taking time as an abscissa and working resistance of the hydraulic support as an ordinate.
In the specific application scene of the application, the mining pressure real-time monitoring system with the data acquisition period smaller than 30s can be used for acquiring all hydraulic support working resistances of the whole working face in real time. The hydraulic support of the whole working surface is all the hydraulic supports on the whole working surface.
In order to more intuitively display the change trend of the hydraulic support working resistance along with time, the time is the abscissa, the hydraulic support working resistance is the ordinate, the hydraulic support time sequence curve is drawn, and the hydraulic working resistance data are arranged according to the time sequence.
S202, calculating the difference value of the working resistance of each adjacent hydraulic support according to the hydraulic support time sequence curve.
For the embodiment, in a specific application scenario, if the hydraulic support timing curve in the period from 07 months, 07 days, 18:14, to 07 months, 08 days, 03:50 is used as the analysis curve of a certain hydraulic support, as shown in fig. 3, the difference of the working resistances of each adjacent hydraulic support, that is, P, can be calculated in the analysis curve n+1 -P n 。
S203, comparing the difference value with a first preset threshold value, determining a maximum bracket load according to a comparison result, and determining a time point corresponding to the maximum bracket load as a corresponding key time point.
For the embodiment, in a specific application scenario, in order to determine the maximum bracket load and the corresponding key time point, step S203 may specifically include:
if the difference value of the hydraulic support working resistance at the current time point and the next time point is smaller than a first preset threshold value, filtering the hydraulic support working resistance at the current time point;
if the hydraulic support working resistance difference value is larger than or equal to the first preset threshold value, screening out a hydraulic support working resistance maximum value in a preset historical time period according to a hydraulic support time sequence curve, determining the hydraulic support working resistance maximum value as a support load maximum value, and determining a corresponding time point as a corresponding key time point.
The first preset threshold is a minimum determination value for determining whether a maximum bracket load exists before the current time point, and the specific value may be set according to an actual application scenario, for example, may be set to 5KN. The preset historical time period is a minimum range for screening the maximum working resistance of the hydraulic support, and can be set to be 5 minutes for example. In a specific application scenario, based on the example of embodiment step 202, if P is determined n+1 -P n If the number of the frames is less than 5KN, the frames can be determined to be produced for non-frame movingIn order not to influence the calculation result of the roof pressure of the fully-mechanized mining face, the working resistance of the hydraulic support needs to be filtered in order to ensure that the effective circulation end resistance is screened out from massive mine pressure data. When judging P n+1 -P n When the pressure is greater than or equal to 5kN, the pressure can be P n And (3) searching for the maximum value of the hydraulic support working resistance within 5 minutes forwards for a time starting point, and determining the time point corresponding to the maximum value as a key time point of the hydraulic support resistance reduction process.
S204, calculating a judging section of each coal mining cycle process according to the key time point set of each hydraulic support.
For this embodiment, in a specific application scenario, in order to determine the determination section of each hydraulic support, step S204 may specifically include:
determining key time points of each hydraulic support in each resistance reducing action, and constructing a key time point set;
calculating an average value of key time points in the key time point set, and determining the average value as an average time point;
and calculating the interval end point of the judging interval according to the key time point and the average time point.
For the embodiment, based on the embodiment of the embodiment S203, key time points of the resistance reduction process generated by each hydraulic support on the whole working surface can be analyzed one by one, and the support load maximum value p when the ith hydraulic support generates the jth resistance reduction action is obtained sequentially ij Key time point t ij And by p ij Element constitutes the maximum support load set P of the full face hydraulic support in the resistance reducing process, and t is ij And constructing a key point set T for the elements, and calculating the average value of key time points in the key time point set.
In a specific application scenario, the key time point t may be used for calculating the average value and the range for convenience ij Converting into time stamps for processing, for example, converting 2019-12-20:16:21:47 into time stamps 1576830107, calculating average values and ranges, and converting the time stamps after processing into specific time points. Corresponding to the critical time from # 1 stent to # i stentPoint t 11 -t i1 . Wherein t is 11 Is the key moment of resistance reduction of the first bracket of the working face machine head, t i1 Is the key time for reducing resistance of the last bracket of the tail of the working face. Then the average time point of the first cycle is t 11 -t i1 And the average value of the (j) th coal mining cycle t is obtained by the same method 1j -t ij Is a mean time point of (2).
Correspondingly, in order to calculate the interval end point of the determination interval according to the key time point and the average time point, the method specifically may further include: determining a key time point which is greater than or equal to the average time point as a first key time point, and determining a key time point which is less than the average time point as a second key time point; calculating a left interval endpoint of the judgment interval by using the first key time point and the first calculation formula; and calculating the right interval endpoint of the judgment interval by using the second key time point and a second calculation formula.
Correspondingly, a full working face hydraulic support circulation final resistance analysis model can be established aiming at the obtained maximum value set T, and the resistance reduction process generated by non-frame movement is screened out from a plurality of calculated significant resistance reduction processes, so that the moment corresponding to the correct circulation final resistance is identified. Wherein, can be based on each stent critical time point t i j And average time point
Is divided into two parts, one of which is when t ij ≥t ij At the time, t ij The first key time point is determined, and a corresponding first calculation formula is as follows: />
Another part is when t ij <t ij At the time, t ij Determining a second key time point, wherein a corresponding second calculation formula is as follows: />
Wherein, the liquid crystal display device comprises a liquid crystal display device,
is the average value of the difference between the first key time point or the second key time point and the average time point.
S205, if the proportion of the number of the key time points in the judging section to the total number in the key time point set is determined to be larger than a second preset threshold value, judging the judging section as a coal mining circulation process.
The second preset threshold is a minimum threshold for determining that the current determination section is the coal mining cycle process, and the specific value may be set according to the actual application scenario, for example, may be set to 80%.
For the present embodiment, after determining the interval boundaries T1 and T2 of each coal mining cycle based on step S204, it can be further determined whether the time of the first coal mining cycle of all the brackets is [ T1, T2 ]]Within this boundary, if element t ij Located in sets [ T1, T2]The number of the inner parts is t ij When the ratio of the total number exceeds 80%, then it is considered that [ T1, T2 ]]This period of time is a coal mining cycle, otherwise it is not a coal mining cycle.
S206, determining a key time point in the judging section as a target key time point, and determining the hydraulic support working resistance corresponding to the target key time point as the circulation end resistance.
For the embodiment, the purpose of determining the target key time point is to identify the correct circulation final resistance and the corresponding moment, screen the resistance reduction process generated by non-frame moving, and further enable the calculated fully-mechanized mining face roof pressure to be more accurate.
S207, calculating an average value of the cycle end resistance, and determining the average value as the roof pressure in the coal mining cycle process.
For the present embodiment, the set [ T1, T2 ] may be calculated]Inner element t ij The average value of the corresponding hydraulic cycle end resistance was taken as the full face top plate pressure.
In the present embodiment, when t ij Located in intervals [ T1, T2]When the coal mining cycle is in the inner period, j+1st coal mining cycle analysis is not involved; when t ij Located in intervals [ T1, T2]When the time point is delayed from the jth frame moving time, the j+1th coal mining cycle analysis process can be still participated; the cycle time difference of two adjacent coal mining is larger than the ratio of the length of the working face to the speed of the coal mining machine, and the length of the working face and the speed of the coal mining machine can be obtained according to on-site actual measurement.
According to the roof pressure calculation method, the hydraulic support working resistance of the fully-mechanized mining face can be acquired in real time by adopting the high-precision and high-sampling-frequency mining pressure monitoring system, a hydraulic support working resistance time sequence change curve is drawn, the support load maximum value and key time points of each hydraulic support of the fully-mechanized mining face in the coal mining circulation process are calculated one by one, the non-frame-moving resistance reduction process is selected from a plurality of calculated significant resistance reduction processes according to the working resistance change characteristics of the hydraulic supports in the frame moving process, so that the correct circulation end resistance and the correct corresponding moment are identified, and the roof pressure is calculated by utilizing the hydraulic support circulation end resistance in the coal mining circulation process. Through the scheme, the mine pressure of the whole working face can be automatically identified in real time, the roof pressure step distance calculation is carried out on the mine pressure of the whole working face, the mine pressure data which cannot reflect the movement rule of the roof and is generated due to the poor working condition and manual misoperation of the hydraulic support can be reduced, the calculation result is more accurate, the comprehensive and accurate summary of the mine pressure rule of the roof is facilitated, the analysis automation level of the mine pressure data is improved, the labor input is reduced, and the safety of coal mining is further ensured.
Further, as an embodiment of the method shown in fig. 1 and fig. 2, an embodiment of the present application provides a device for calculating a top plate pressure, as shown in fig. 4, where the device includes: a screening module 31, a determination module 32 and a calculation module 33;
the screening module 31 is configured to screen out a maximum bracket load of each hydraulic bracket and a corresponding key time point;
the determining module 32 is configured to determine a coal mining cycle according to the maximum value of the bracket load in the determination section and the critical time point in the determination section;
the calculation module 33 may be configured to calculate the roof pressure using the hydraulic bracket end-of-cycle resistance during the decision interval coal mining cycle.
In a specific application scenario, in order to screen out the maximum bracket load of each hydraulic bracket and the corresponding key time point, as shown in fig. 5, the screening module 31 may specifically include: a drawing unit 311, a calculation unit 312, a determination unit 313;
the drawing unit 311 can be used for collecting the working resistance of the hydraulic support on the whole working surface in real time, judging the working resistance of the hydraulic support in the section as the ordinate by taking the time as the abscissa, and drawing a time sequence curve of the hydraulic support;
a calculating unit 312, configured to calculate a difference value of the working resistances of each adjacent hydraulic support according to the timing curve of the hydraulic support in the determination section;
the determining unit 313 may be configured to compare the difference value of the determination interval with a first preset threshold, determine a maximum stent load according to the comparison result, and determine a time point corresponding to the maximum stent load of the determination interval as a corresponding key time point.
Correspondingly, the determining unit 313 is specifically configured to filter out the hydraulic support working resistance at the current time point of the determination section if the difference between the hydraulic support working resistance at the current time point and the next time point is determined to be smaller than the first preset threshold of the determination section; if the judging section hydraulic support working resistance difference value is larger than or equal to the first preset threshold value of the judging section, screening out a hydraulic support working resistance maximum value in a preset historical time period according to the judging section hydraulic support time sequence curve, determining the judging section hydraulic support working resistance maximum value as a judging section support load maximum value, and determining a corresponding time point as a corresponding judging section key time point.
In a specific application scenario, to determine the coal mining cycle, as shown in fig. 5, the determining module 32 may specifically include: a calculation unit 321 and a determination unit 322;
the calculating unit 321 is configured to calculate a determination section of each coal mining cycle process in the determination section according to the set of key time points of each hydraulic support;
the determining unit 322 may be configured to determine the determination section as a coal mining cycle if it is determined that the ratio of the number of key time points in the determination section to the total number of key time points in the determination section is greater than the second preset threshold.
Correspondingly, the calculating unit 321 is specifically configured to determine key time points of each hydraulic support in each resistance-reducing action, and construct a key time point set; calculating the average value of key time points in the key time point set of the judging section, and determining the average value of the judging section as an average time point; and calculating the section end point of the judgment section according to the judgment section key time point and the judgment section average time point.
Accordingly, to determine the interval endpoint of the determination interval, the computing unit 321 may be specifically configured to determine a key time point greater than or equal to the average time point of the determination interval as a first key time point, and determine a key time point less than the average time point of the determination interval as a second key time point; calculating a left section endpoint of the judgment section by using the first key time point of the judgment section and the first calculation formula; and calculating the right section endpoint of the judgment section by using the second key time point of the judgment section and the second calculation formula.
In a specific application scenario, to calculate the roof pressure, as shown in fig. 5, the calculating module 33 may specifically include: a determination unit 331, a calculation unit 332;
a determining unit 331, configured to determine a key time point in a determination section of the determination section as a target key time point, and determine a hydraulic support working resistance corresponding to the target key time point of the determination section as a cycle end resistance;
the calculating unit 332 may be configured to calculate an average value of the end resistance of the decision interval cycle, and determine the decision interval average value as the roof pressure during the coal mining cycle of the decision interval.
It should be noted that, for other corresponding descriptions of each functional unit related to the calculating device for the roof pressure provided in the present embodiment, reference may be made to corresponding descriptions in fig. 1 to 2, and no further description is given here.
Those skilled in the art will appreciate that the top plate pressure calculation device provided in the embodiments of the present application is not limited to a physical device, and may include more or fewer components, or may be combined with certain components, or may be deployed with different components.
Through applying the technical scheme of this application, compare with present prior art, this application adopts the mining pressure monitoring system of high accuracy, high sampling frequency at first and gathers full working face hydraulic support operating resistance in real time, drawing hydraulic support operating resistance time sequence change curve, calculate support load maximum value and the key time point of every hydraulic support of full working face at coal-winning cycle in-process one by one, according to hydraulic support operating resistance change characteristic at the frame in-process of moving, select the frame in-process of moving that does not move and the resistance process that falls that produces from numerous showing that have calculated, thereby discern exact circulation end resistance and corresponding moment. And finally, calculating the roof pressure by utilizing the hydraulic support circulation end resistance in the coal mining circulation process. Through the scheme, the mine pressure of the whole working face can be automatically identified in real time, the roof pressure step distance calculation is carried out by the mine pressure of the whole working face, the mine pressure data which are generated due to poor working conditions of the support and manual misoperation and cannot reflect the movement rule of the roof are reduced, the calculation result is more accurate, the comprehensive and accurate summary of the mine pressure rule of the roof is facilitated, the analysis automation level of the mine pressure data is improved, the manpower input is reduced, and the safety of coal mining is further ensured.
The present application also provides a non-volatile computer storage medium storing computer-executable instructions configured for a roof pressure calculation method as described above.
The application also provides an electronic device comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the ceiling pressure calculation method as described above.
The apparatus for performing the ceiling pressure calculation method as described above may further include: input means and output means. The processor, memory, input devices, and output devices may be connected by a bus or other means.
The memory is used as a non-volatile computer readable storage medium for storing non-volatile software programs, non-volatile computer executable programs, and modules. The processor executes various functional applications of the server and data processing by running nonvolatile software programs, instructions and modules stored in the memory, that is, implements the ceiling pressure calculation method in the above-described method embodiment.
The memory may include a memory program area and a memory data area, wherein the memory program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the ceiling pressure calculation method, or the like. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device.
The input device may receive input numeric or character information and generate key signal inputs related to user settings and function control associated with the roof pressure calculation method. The output means may comprise a display device such as a display screen.
The one or more modules are stored in the memory that, when executed by the one or more processors, perform the ceiling pressure calculation method of any of the method embodiments described above.
The product can execute the method provided by the embodiment of the invention, and has the corresponding function module and beneficial effects of the execution method. Technical details not described in detail in this embodiment may be found in the methods provided in the embodiments of the present invention.
The electronic device of the embodiments of the present invention exists in a variety of forms including, but not limited to:
(1) A mobile communication device: such devices are characterized by mobile communication capabilities and are primarily aimed at providing voice, data communications. Such terminals include: smart phones (e.g., iPhone), multimedia phones, functional phones, and low-end phones, etc.
(2) Ultra mobile personal computer device: such devices fall within the category of personal computers, having computing and processing functions, and generally also possessing mobile internet access characteristics. Such terminals include: PDA, MID, and UMPC devices, etc., such as iPad.
(3) Portable entertainment device: such devices may display and play multimedia content. Such a device comprises: audio, video players (e.g., iPod), palm game consoles, electronic books, and smart toys and portable car navigation devices.
(4) And (3) a server: the server is similar to a general computer architecture in terms of processing capability, stability, reliability, security, scalability, manageability and the like because of the need to provide highly reliable services.
(5) Other electronic devices with data interaction function.
Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part of the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a mobile terminal (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment of the invention. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, but may also be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the method described in the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A roof pressure calculation method, comprising:
screening out the maximum support load value and the corresponding key time point of each hydraulic support;
determining a coal mining circulation process according to the maximum support load and the key time point;
the coal mining circulation process is determined according to the maximum support load and the key time point, and the method comprises the following steps:
judging that the resistance reduction belongs to a frame moving action or a coal mining cycle according to the maximum support load and a key time point so as to filter out a resistance reduction process caused by non-frame moving and determine the coal mining cycle process;
calculating the roof pressure by utilizing the hydraulic support circulation end resistance in the coal mining circulation process;
calculating roof pressure using hydraulic support cycle end resistance during a coal mining cycle includes:
determining a key time point in the judging section as a target key time point, and determining the working resistance of the hydraulic support corresponding to the target key time point as the circulation end resistance;
the average of the end-of-cycle resistances is calculated and determined as the roof pressure during the coal mining cycle.
2. The method of claim 1, wherein screening out a maximum bracket load for each hydraulic bracket and a corresponding key point in time comprises:
collecting the working resistance of the hydraulic support on the whole working surface in real time, taking time as an abscissa, taking the working resistance of the hydraulic support as an ordinate, and drawing a time sequence curve of the hydraulic support;
calculating the difference value of the working resistance of each adjacent hydraulic support according to the hydraulic support time sequence curve;
comparing the difference value with a first preset threshold value, determining a maximum bracket load according to a comparison result, and determining a time point corresponding to the maximum bracket load as a corresponding key time point.
3. The method of claim 2, wherein comparing the difference value with a first preset threshold value, determining a stent load maximum value based on the comparison result, and determining a time point corresponding to the stent load maximum value as a corresponding key time point comprises:
if the difference value of the hydraulic support working resistance at the current time point and the next time point is smaller than a first preset threshold value, filtering the hydraulic support working resistance at the current time point;
if the hydraulic support working resistance difference value is larger than or equal to the first preset threshold value, screening out a hydraulic support working resistance maximum value in a preset historical time period according to a hydraulic support time sequence curve, determining the hydraulic support working resistance maximum value as a support load maximum value, and determining a corresponding time point as a corresponding key time point.
4. The method of claim 1, wherein determining a coal mining cycle based on the maximum stent load and the key time point comprises:
calculating a judging section of each coal mining cycle process according to the key time point set of each hydraulic support;
and if the proportion of the number of the key time points in the judging section to the total number in the key time point set is larger than the second preset threshold value, judging the judging section as a coal mining circulation process.
5. The method of claim 4, wherein calculating a decision interval for each coal mining cycle based on the set of key points in time for each hydraulic mount comprises:
determining key time points of each hydraulic support in each resistance reducing action, and constructing a key time point set;
calculating an average value of key time points in the key time point set, and determining the average value as an average time point;
and calculating the interval end point of the judging interval according to the key time point and the average time point.
6. The method of claim 5, wherein calculating the interval end point of the decision interval from the critical time point and the average time point comprises:
determining a key time point which is greater than or equal to the average time point as a first key time point, and determining a key time point which is less than the average time point as a second key time point;
calculating a left interval endpoint of the judgment interval by using the first key time point and the first calculation formula;
and calculating the right interval endpoint of the judgment interval by using the second key time point and a second calculation formula.
7. The method of claim 6, wherein the first calculation formula and the second calculation formula are each:
wherein T1 is the left interval endpoint, T2 is the right interval endpoint, T ij Generating a key time point corresponding to the maximum support load value when the jth resistance reducing action is generated for the ith hydraulic support, when
At time t ij For the first critical time point, when +.>
At time t ij Is the second key point in time; />
Is the average time point; />
Is the average value of the difference between the first key time point or the second key time point and the average time point.
8. A non-transitory computer storage medium storing computer executable instructions configured for the roof pressure calculation method of any one of claims 1-7.
9. An electronic device, comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the ceiling pressure calculation method of any one of claims 1-7.
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| CN112966373B (en) * | 2021-02-23 | 2024-03-12 | 陕西陕煤黄陵矿业有限公司 | Mining process decision method, system, equipment and readable storage medium |
| CN113323697B (en) * | 2021-05-31 | 2023-11-03 | 国能神东煤炭集团有限责任公司 | Bracket initial supporting force and working resistance recognition method, storage medium and electronic equipment |
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