CN114033368B - Coal cutting circulation analysis method based on hydraulic support primary supporting force - Google Patents
Coal cutting circulation analysis method based on hydraulic support primary supporting force Download PDFInfo
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- CN114033368B CN114033368B CN202111327396.7A CN202111327396A CN114033368B CN 114033368 B CN114033368 B CN 114033368B CN 202111327396 A CN202111327396 A CN 202111327396A CN 114033368 B CN114033368 B CN 114033368B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
- E21C25/10—Rods; Drums
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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Abstract
The invention relates to a coal cutting circulation analysis method based on the initial supporting force of hydraulic supports, which is characterized in that the hydraulic supports are divided into m groups, each group contains n hydraulic supports, and one hydraulic support in each group is provided with a mine pressure detection sensor; acquiring a mine pressure value of a hydraulic support at a certain moment, and generating a first data set according to time sequence sequencing; analyzing all initial supporting force occurrence moments of each hydraulic support provided with the mine pressure detection sensor according to the first data set, and generating a second data set according to a time sequence; according to the first data set and the second data set, generating a third data set by using the hydraulic support frame number at which the initial supporting force occurs and the initial supporting force occurrence time according to time sequence; acquiring minimum and maximum values of the hydraulic support frame numbers in the third data set, and generating a fourth data set according to time sequences; and judging the size relation between the maximum value and the minimum value in the fourth data set and the median of the frame number, and calculating the total number of coal cutting cycles based on the size relation.
Description
Technical Field
The invention relates to the technical field of underground coal mining, in particular to a coal cutting circulation analysis method based on hydraulic support primary supporting force.
Background
In the stoping process of the coal mine working face, the accurate identification of the coal cutting circulation has great significance for the coal mine manager to make a production plan and execute decisions. The coal mine automation working face is generally mined by adopting an electrohydraulic control system, and the number of coal cutting cycles can be analyzed through the position track data of the coal machine.
In carrying out the invention, the inventors have found that at least the following problems exist in the prior art: the non-electrohydraulic control system of the coal mine is lack of monitoring means for automatically analyzing the coal cutting circulation on the stoping face, and the coal mine technicians are required to manually measure and count the coal cutting circulation every shift, so that data reporting is not timely, and even false reporting and reporting are caused.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the invention aims to provide a coal cutting circulation analysis method based on the initial supporting force of a hydraulic support.
In order to achieve the above purpose, the invention provides a coal cutting circulation analysis method based on hydraulic support primary supporting force, which comprises the following steps:
dividing the hydraulic supports of the working face into m groups, wherein each group contains n hydraulic supports, and installing an ore pressure detection sensor on one hydraulic support in each group;
acquiring a mine pressure value of a hydraulic support provided with a mine pressure detection sensor at a certain moment, and generating a first data set S according to time sequence ordering m×n ＝{(t 1 ,x 1 ),(t 2 ,x 2 ),...,(t i ,x i ) In the formula, t i For time of day, x i Is the ore pressure value;
analyzing all initial supporting force occurrence moments of each hydraulic support provided with the mine pressure detection sensor according to the first data set, and generating a second data set C according to a time sequence m×n ＝{t 1 ,t 2 ,...,t j In the formula, t j The moment of initial supporting force;
generating a third data set T= { (T) according to the first and second data sets, and the hydraulic bracket number at which the initial supporting force occurs and the initial supporting force occurrence time according to time sequence 1 ,N 1 ),(t 2 ,N 2 ),...,(t j ,N j ) In the formula, N j For initial supporting force generation time t j Corresponding hydraulic support frame numbers;
acquiring the minimum value and the maximum value of the hydraulic support frame number in the third data set, and generating a fourth data set S= { XMIN according to time sequence 1 ,XMax 1 ,XMin 2 ,XMax 2 ,...,XMin k ,XMax k }, wherein XMIN k Is minimum value, XMax k K is the number of the minimum and the maximum;
and judging the size relation between the maximum value and the minimum value in the fourth data set and the median of the frame number, and calculating the total number of coal cutting cycles based on the size relation.
According to the coal cutting circulation analysis method, the initial supporting force analysis result of the hydraulic support of the stope face is converted into data of time and hydraulic support frame number through dimension conversion, position frame number data are inverted, automatic analysis of coal cutting circulation of the stope face is achieved, a feasible means is provided for reporting and supervising the total number of coal cutting circulation of a coal mine, meanwhile, an effective way of propulsion analysis is provided for research of mine pressure rules of the roof of the stope face, and management level of the roof of the coal mine is improved.
According to one embodiment of the invention, the coal cutting cycle analysis method further comprises:
when each maximum value is larger than or equal to the median of the frame number and the minimum value is smaller than or equal to the median of the frame number, calculating the total number C of coal cutting cycles in the analysis time period t ＝C u +C d Wherein C u Is the number of maximum values, C d Is the number of minima.
According to one embodiment of the invention, the coal cutting cycle analysis method further comprises:
deleting the maximum value and a minimum value which appears in pairs with the maximum value from the fourth data set when the maximum value is smaller than the median of the frame numbers;
when the minimum value is greater than the median of the frame number, the minimum value and a maximum value that appears in pairs with the minimum value are deleted from the fourth data set.
According to one embodiment of the invention, the coal cutting cycle analysis method further comprises:
the method for calculating the median of the frame number comprises the following steps:
wherein x is mid Is the median of the frame number, x min Is the minimum value of the frame number, x max Is the maximum value of the frame number.
According to one embodiment of the invention, the coal cutting cycle analysis method further comprises:
in the m groups of hydraulic supports, n-1 hydraulic supports without ore pressure detection sensors are arranged between the hydraulic supports with the ore pressure detection sensors in two adjacent groups.
According to one embodiment of the invention, the coal cutting cycle analysis method further comprises:
before the minimum value and the maximum value of the frame number in the third data set are obtained and the fourth data set is generated, the method comprises the step of smoothing the data in the third data set by adopting a moving average method.
According to one embodiment of the invention, the coal cutting cycle analysis method further comprises:
and acquiring the minimum value and the maximum value of the frame number in the third data set by adopting a sliding window method, and generating a fourth data set. .
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic flow chart of a coal cutting circulation analysis method based on a hydraulic support initial supporting force according to an embodiment of the invention.
FIG. 2 is a schematic representation of the acquisition of the point of the initial support force from the time series of mine pressures according to an embodiment of the present invention.
Fig. 3 is a schematic diagram showing the relationship between the initial supporting force time and the hydraulic bracket number according to an embodiment of the present invention.
Fig. 4 is a flow chart of a method for obtaining a minimum value and a maximum value of a frame number according to a sliding window method according to an embodiment of the invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. On the contrary, the embodiments of the invention include all alternatives, modifications and equivalents as may be included within the spirit and scope of the appended claims.
Example 1
Fig. 1 is a schematic flow chart of a coal cutting circulation analysis method based on a hydraulic support initial supporting force according to an embodiment of the invention.
Referring to fig. 1, a coal cutting cycle analysis method based on hydraulic support primary supporting force comprises the following steps:
s102, dividing the hydraulic supports of the working face into m groups, wherein each group comprises n hydraulic supports, and installing a mine pressure detection sensor on one of the hydraulic supports in each group.
It will be appreciated that the number of sets of hydraulic supports in this step, and the number of hydraulic supports in each set, may be determined based on field practice. The non-electrohydraulic control system is used for stoping the working surface, and a sensor which can be used for measuring the position of the coal cutter is not arranged on the coal cutter.
S104, acquiring a mine pressure value of a hydraulic support provided with a mine pressure detection sensor at a certain moment, and generating a first data set S according to time sequence ordering m×n ＝{(t 1 ,x 1 ),(t 2 ,x 2 ),...,(t i ,x i ) In the formula, t i For time of day, x i Is the mine pressure value.
It should be noted that the mine pressure value is uploaded to the on-well detection host in real time, and mine pressure monitoring data of the existing mine pressure monitoring system of the coal mine can be collected through a communication protocol such as text, ftp, web service or direct reading database.
S106, analyzing and obtaining all initial supporting force generation moments of each hydraulic support provided with the mine pressure detection sensor according to the first data set, and generating a first supporting force according to a time sequenceTwo data sets C m×n ＝{t 1 ,t 2 ,...,t j In the formula, t j The initial supporting force generation time is set.
In the step, as the hydraulic supports are operated according to the 'lowering frame-moving frame-lifting frame', the original mine pressure data is monitored through each support, and all initial supporting force generation moments of each hydraulic support can be obtained through analysis.
As a possible implementation manner, the analysis of all the initial supporting force generating moments of each hydraulic bracket can be realized by using the technical scheme of judging initial supporting force and cycle end resistance in publication number CN112302720 a. Referring to fig. 2, the plot shows the point of initial support force and the point of end-of-cycle resistance.
S108, according to the first data set and the second data set, generating a third data set T= { (T) by using the hydraulic support frame number of the initial supporting force and the initial supporting force generating time according to time sequence 1 ,N 1 ),(t 2 ,N 2 ),...,(t j ,N j ) In the formula, N j For initial supporting force generation time t j Corresponding hydraulic support frame numbers.
In this step, the third data set T is a hydraulic bracket number obtained by primary support force inversion.
S110, acquiring the minimum value and the maximum value of the hydraulic support frame number in the third data set, and generating a fourth data set S= { XMIN according to time sequence 1 ,XMax 1 ,XMin 2 ,XMax 2 ,...,XMin k ,XMax k }, wherein XMIN k Is minimum value, XMax k The maximum value is k, and the number of the minimum value and the maximum value is k.
It will be appreciated that minima and maxima in the fourth data set are regularly arranged in an inter-crossing order. Referring to fig. 3, minima and maxima regularly cross each other.
And S112, judging the size relation between the maximum value and the minimum value in the fourth data set and the median of the frame number, and calculating the total number of coal cutting cycles based on the size relation. The size relationship can be divided into the following two cases.
First case:
when each maximum value is larger than or equal to the median of the frame number and the minimum value is smaller than or equal to the median of the frame number, calculating the total number C of coal cutting cycles in the analysis time period t ＝C u +C d Wherein C u Is the number of maximum values, C d Is the number of minima.
Second case:
deleting the maximum value and a minimum value which appears in pairs with the maximum value from the fourth data set when the maximum value is smaller than the median of the frame numbers;
when the minimum value is greater than the median of the frame numbers, the minimum value and a maximum value that appears in pairs with the minimum value are deleted from the fourth data set.
And then calculating the total number of the coal cutting cycles according to the formula of the total number of the coal cutting cycles provided in the first situation.
According to the coal cutting circulation analysis method, the initial supporting force analysis result of the hydraulic support of the stope face is converted into data of time and hydraulic support frame number through dimension conversion, position frame number data are inverted, automatic analysis of coal cutting circulation of the stope face is achieved, a feasible means is provided for reporting and supervising the total number of coal cutting circulation of a coal mine, meanwhile, an effective way of propulsion analysis is provided for research of mine pressure rules of the roof of the stope face, and management level of the roof of the coal mine is improved.
Specifically, the calculation method of the median of the frame number is as follows:
wherein x is mid Is the median of the frame number, x min Is the minimum value of the frame number, x max Is the maximum value of the frame number.
As one possible implementation manner, among the m sets of hydraulic supports, there are n-1 hydraulic supports without installed mine pressure detection sensors between the hydraulic supports with installed mine pressure detection sensors in the adjacent two sets. That is, in the hydraulic support sequence, one support pressure monitoring sensor is installed at each interval of n supports, so that a hydraulic support list set l= { n,2n,..m×n } with the mine pressure detecting sensors installed can be obtained. This is generally done during actual production.
Advantageously, in order to eliminate noise interference caused by inversion data, the data in the third data set is smoothed by a moving average method before the minimum and maximum values of the frame numbers in the third data set are acquired to generate the fourth data set.
Example two
Wherein parts identical to or corresponding to those of the first embodiment are designated by corresponding reference numerals. For simplicity, only the points of distinction between the second embodiment and the first embodiment will be described.
There are many ways to obtain the minimum and maximum of the frame number in the third data set and generate the second data set. The following alternative implementations are provided in this embodiment.
And acquiring the minimum value and the maximum value of the frame number in the third data set by adopting a sliding window method, and generating a fourth data set. Referring to fig. 3, the method comprises the steps of:
step S1081, initializing a time sequence;
step S1082, establishing a sliding window, traversing window elements;
the window element refers to the frame number data.
Step S1083, when the queue element is full, replacing the queue head element with the new queue tail element to be input;
step S1084, judging whether the first element of the queue is a maximum value or a minimum value, and if so, re-finding the maximum value or the minimum value of the queue; if not, inputting a tail element;
step S1085, solving the maximum and minimum values of the queue.
The maximum value and the minimum value of the queue are the fourth data set generated by the minimum value and the maximum value of the frame number in the third data set.
The sliding window algorithm can solve the problem of subelements of an array/character string, can convert the nested circulation problem into a single circulation problem, and reduces the time complexity.
Compared with the prior art, the method provided by the second embodiment of the invention adopts a sliding window mode dynamic maximum value and minimum value to count the number of coal cutting cycles, and realizes the automatic analysis of coal cutting cycles of the coal face. The false alarm of the number of manually reported coal cutting cycles is reduced to a certain extent.
It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (4)
1. The coal cutting circulation analysis method based on the initial supporting force of the hydraulic support is characterized by comprising the following steps of:
dividing the hydraulic supports of the working face into m groups, wherein each group contains n hydraulic supports, and installing an ore pressure detection sensor on one hydraulic support in each group;
acquiring a mine pressure value of a hydraulic support provided with a mine pressure detection sensor at a certain moment, and generating a first data set according to time sequence orderingWherein t is i For time of day, x i Is the ore pressure value;
analyzing all initial supporting force occurrence moments of each hydraulic support provided with the mine pressure detection sensor according to the first data set, and generating a second data set according to a time sequenceWherein t is j The moment of initial supporting force;
according to the first and second data sets, generating a third data set by using the hydraulic bracket number of the initial supporting force and the initial supporting force generating time according to time sequenceWherein N is j For initial supporting force generation time t j Corresponding hydraulic support frame numbers;
acquiring minimum and maximum values of the hydraulic support frame numbers in the third data set, and generating a fourth data set according to time sequenceWherein->Is minimum value +.>K is the number of the minimum and the maximum;
judging the size relation between the maximum value and the minimum value in the fourth data set and the median of the frame number, and calculating to obtain the total number of coal cutting cycles based on the size relation;
when each maximum value is larger than or equal to the median of the frame number and the minimum value is smaller than or equal to the median of the frame number, calculating the total number C of coal cutting cycles in the analysis time period t =C u +C d Wherein C u Is the number of maximum values, C d The number of the minimum values;
deleting the maximum value and a minimum value which appears in pairs with the maximum value from the fourth data set when the maximum value is smaller than the median of the frame numbers;
deleting the minimum value and a maximum value which appears in pairs with the minimum value from the fourth data set when the minimum value is greater than the median of the frame numbers;
the method for calculating the median of the frame number comprises the following steps:
wherein->Is the median of the frame number->Is the minimum of the frame number, +.>Is the maximum value of the frame number.
2. A method of coal cycle analysis based on hydraulic bracket primary support force as claimed in claim 1, the method comprising:
in the m groups of hydraulic supports, n-1 hydraulic supports without ore pressure detection sensors are arranged between the hydraulic supports with the ore pressure detection sensors in two adjacent groups.
3. The method for analyzing coal cutting circulation based on the initial supporting force of the hydraulic support according to claim 1, wherein,
before the minimum value and the maximum value of the frame number in the third data set are obtained and the fourth data set is generated, the method comprises the step of smoothing the data in the third data set by adopting a moving average method.
4. The method for analyzing coal cutting circulation based on the initial supporting force of the hydraulic support according to claim 1, wherein the method comprises the following steps:
and acquiring the minimum value and the maximum value of the frame number in the third data set by adopting a sliding window method, and generating a fourth data set.
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Citations (4)
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|---|---|---|---|---|
| AU3471184A (en) * | 1983-11-04 | 1985-05-09 | Charbonnages De France | Machine remote control |
| CN112302720A (en) * | 2020-09-30 | 2021-02-02 | 中煤科工开采研究院有限公司 | Method and system for judging initial supporting force and cycle end resistance of working surface hydraulic support |
| CN113503160A (en) * | 2021-06-28 | 2021-10-15 | 陈迪蕾 | Fully mechanized coal mining face key equipment energy consumption modeling and collaborative optimization control method |
| CN113569459A (en) * | 2021-06-08 | 2021-10-29 | 中国矿业大学 | Group intelligence-based hydraulic support performance degradation quantitative evaluation method and system |
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- 2021-11-10 CN CN202111327396.7A patent/CN114033368B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3471184A (en) * | 1983-11-04 | 1985-05-09 | Charbonnages De France | Machine remote control |
| US4980681A (en) * | 1983-11-04 | 1990-12-25 | Charbonnages De France | Direct view remote control method for workings machine and transmitter and receiver assembly for carrying out such method |
| CN112302720A (en) * | 2020-09-30 | 2021-02-02 | 中煤科工开采研究院有限公司 | Method and system for judging initial supporting force and cycle end resistance of working surface hydraulic support |
| CN113569459A (en) * | 2021-06-08 | 2021-10-29 | 中国矿业大学 | Group intelligence-based hydraulic support performance degradation quantitative evaluation method and system |
| CN113503160A (en) * | 2021-06-28 | 2021-10-15 | 陈迪蕾 | Fully mechanized coal mining face key equipment energy consumption modeling and collaborative optimization control method |
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