CN114139313A - Method and device for judging incoming pressure of deep coal face - Google Patents
Method and device for judging incoming pressure of deep coal face Download PDFInfo
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Abstract
本发明提供一种深部采煤工作面来压判定方法及装置，本发明的方法采用循环时间加权阻力、循环高阻力区间占比、循环安全阀开启比例三个指标，在不改变原矿压规律的基础上，将区分度小的指标参数转换为区分度高的指标参数，从而达到真实、有效区分深部采场周期来压的目的。该方法同时兼顾了单个支架压力和工作面总体压力，对深部工作面顶板安全管理起到指导作用。
The invention provides a method and a device for determining the pressure of a deep coal mining face. The method of the invention adopts three indicators: the weighted resistance of the cycle time, the proportion of the cycle high resistance interval, and the opening ratio of the cycle safety valve. On the basis, 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 pressure of the deep stope. The method takes into account the pressure of a single support and the overall pressure of the working face at the same time, and plays a guiding role in the safety management of the roof of the deep working face.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a method and a device for judging the pressure of a deep coal face.
Background
Currently, the pressure determination methods commonly used in coal mines are roughly classified into two types: one is that the pressure is visually judged by a pressure cloud picture drawn by software on the basis of mine pressure monitoring data, the abscissa is the pushing progress or date, and the ordinate is the number of a working face bracket; one type uses the cycle end resistance, the maximum working resistance or the weighted working resistance of the bracket as indexes, adopts one or more indexes to draw a pressure curve of a single bracket, and obtains an incoming pressure criterion by utilizing the mean square error, so that the incoming pressure of the single bracket is judged and summarized to reflect the total incoming pressure of a working surface. The former is suitable for a shallow buried deep working surface or a working surface with large division between an incoming pressure area and a non-incoming pressure area, and can clearly define the range and the size of the incoming pressure; the latter has wider applicability, but has large analysis workload, and the pressure position can not be obtained visually due to the asynchronism of the pressure, and secondary artificial judgment is needed after transverse comparison of all the supports.
As the coal mine in China is gradually developed towards the deep part, the coal mine is influenced by deep high ground stress, rock creep action and high-strength mining, the distinction degree between incoming pressure and non-incoming pressure of a working face is generally low, when a first-class or second-class incoming pressure judgment method is adopted, the high-pressure area interweaving of the incoming pressure and the non-incoming pressure or the pressure curve peak value difference is small, the incoming pressure cannot be effectively judged, and the obtained conclusion error is large.
Disclosure of Invention
The invention provides a method and a device for judging the coming pressure of a deep coal face, which are used for solving the defect of small indexing of the coming pressure area of a deep stope in the prior art and realizing the safety management of a top plate of the deep coal face.
The invention provides a deep coal face pressure judgment method, which comprises the following steps:
acquiring a resistance value sequence of each support in each coal mining cycle;
carrying out 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;
dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance values and calculating the number of the resistance values in the high-resistance interval to obtain the proportion of the high-resistance interval of the supports in each coal mining cycle;
comparing the last resistance value of the resistance value sequence of each support in each coal mining cycle with a rated resistance value to obtain the opening ratio of a support safety valve in each coal mining cycle;
and obtaining the pressure law according to the maximum value of the weighted resistance of the cycle time of each support in a plurality of coal mining cycles, the maximum value of the ratio of the high resistance interval of the support in each coal mining cycle and the maximum value of the opening ratio of the safety valve of the support in each coal mining cycle.
According to the deep coal face pressure judgment method provided by the invention, the pressure law is obtained according to the maximum value of the weighted resistance of the cycle time of each support in a plurality of coal mining cycles, the maximum value of the occupation ratio of the high resistance interval of the support in each coal mining cycle and the maximum value of the opening ratio of the safety valve of the support in each coal mining cycle, and the method comprises the following steps:
establishing a weighted resistance matrix according to the cycle time weighted resistance of each support in a plurality of coal mining cycles; obtaining a high-resistance interval proportion matrix according to the proportion of the high-resistance intervals of the supports in a plurality of coal mining cycles; obtaining a safety valve opening proportion matrix according to the opening proportions of the safety valves of the supports in the plurality of coal mining cycles;
and obtaining an incoming pressure rule according to the weighted resistance matrix, the high-resistance interval proportion matrix and the maximum value of the safety valve opening proportion matrix.
According to the deep coal face pressure judgment method provided by the invention, the pressure law comprises a pressure range, a pressure step and a pressure duration.
According to the deep coal face pressure judgment method provided by the invention, the weighted average is carried out 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, and the method comprises the following steps:
and carrying out weighted average on the resistance value sequence of each support in each coal mining cycle and the curve of time to obtain the cycle time weighted resistance of each support in each coal mining cycle.
According to the deep coal face pressure judgment method provided by the invention, the method for dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance value and calculating the number of the resistance values in the high resistance interval to obtain the occupation ratio of the support high resistance interval in each coal mining cycle comprises the following steps:
dividing resistance value sequences of all the supports in each coal mining cycle into a plurality of sections according to 10% of rated resistance values, calculating the number of the resistance values in the section of 90% of the rated resistance values, and obtaining the percentage of the high-resistance sections of the supports in each coal mining cycle according to the percentage of the number of the resistance values in the section of 90% of the rated resistance values to the total resistance number of the resistance value sequences.
According to the deep coal face pressure judgment method provided by the invention, the step of comparing the last resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to obtain the opening proportion of the support safety valve in each coal mining cycle comprises the following steps:
and comparing the last 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 the supports with the last resistance value being larger than or equal to the rated resistance value in each coal mining cycle to the total number of the supports, and obtaining the opening proportion of the support safety valve in each coal mining cycle.
The present invention also provides a deep coal face pressure determination device, including:
the pressure acquisition module is used for acquiring a resistance value sequence of each support in each coal mining cycle;
the index analysis module is used for carrying out 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; dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance values and calculating the number of the resistance values in the high-resistance interval to obtain the proportion of the support high-resistance interval in each coal mining cycle; the support safety valve opening ratio acquisition module is also used for comparing the last resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to acquire the support safety valve opening ratio in each coal mining cycle;
and the pressure-coming determination module is used for obtaining a pressure-coming rule according to the maximum value of the weighted resistance of the cycle time of each support in a plurality of coal mining cycles, the maximum value of the ratio of the high resistance interval of the support in each coal mining cycle and the maximum value of the opening ratio of the safety valve of the support in each coal mining cycle.
According to the deep coal face pressure judgment device provided by the invention, the pressure law is obtained according to the maximum value of the weighted resistance of the cycle time of each support in a plurality of coal mining cycles, the maximum value of the occupation ratio of the high resistance section of the support in each coal mining cycle and the maximum value of the opening ratio of the safety valve of the support in each coal mining cycle, and the pressure law comprises the following steps:
establishing a weighted resistance matrix according to the cycle time weighted resistance of each support in a plurality of coal mining cycles; obtaining a high-resistance interval proportion matrix according to the proportion of the high-resistance intervals of the supports in a plurality of coal mining cycles; obtaining a safety valve opening proportion matrix according to the opening proportions of the safety valves of the supports in the plurality of coal mining cycles;
and obtaining an incoming pressure rule according to the weighted resistance matrix, the high-resistance interval proportion matrix and the maximum value of the safety valve opening proportion matrix.
According to the deep coal face pressure judgment device provided by the invention, the pressure law comprises a pressure range, a pressure step and a pressure duration.
According to the deep coal face pressure judgment device provided by the invention, the weighted average is carried out 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, and the device comprises:
and carrying out weighted average on the resistance value sequence of each support in each coal mining cycle and the curve of time to obtain the cycle time weighted resistance of each support in each coal mining cycle.
According to the deep coal face pressure judgment device provided by the invention, the method for dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance value and calculating the number of the resistance values in the high-resistance interval to obtain the occupation ratio of the support high-resistance interval in each coal mining cycle comprises the following steps:
dividing resistance value sequences of all the supports in each coal mining cycle into a plurality of sections according to 10% of rated resistance values, calculating the number of the resistance values in the section of 90% of the rated resistance values, and obtaining the percentage of the high-resistance sections of the supports in each coal mining cycle according to the percentage of the number of the resistance values in the section of 90% of the rated resistance values to the total resistance number of the resistance value sequences.
According to the deep coal face pressure judgment device provided by the invention, the step of comparing the last 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 comprises the following steps:
and comparing the last 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 the supports with the last resistance value being larger than or equal to the rated resistance value in each coal mining cycle to the total number of the supports, and obtaining the opening proportion of the support safety valve in each coal mining cycle.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the steps of the method for judging the pressure of the deep coal face.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the deep coal face approach pressure determination method as any one of the above.
The present invention also provides a computer program product comprising a computer program which, when executed by a processor, carries out the steps of the deep coal face approach pressure determination method as any one of the above.
According to the method and the device for judging the pressure of the deep coal face, provided by the invention, the discrimination degree of index parameters is improved through a pressure judging method of three indexes, namely the cycle time weighted resistance, the cycle high resistance interval ratio and the cycle safety valve opening ratio, and the problems that the previous pressure identifying method is poor in applicability to a deep stope and large in identifying error are solved. The three index parameters adopted by the invention can be automatically captured and analyzed by a computer programming method, so that the automatic and accurate judgment of the incoming pressure is met, and the analysis efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a deep coal face pressure determination method provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a method for calculating weighted resistance for cycle time according to an embodiment of the present invention;
FIG. 3 is a cloud graph of cycle time weighted resistances provided by an embodiment of the present invention;
FIG. 4 is a combined graph of the duty ratio of the high-resistance cycle section and the opening ratio of the safety cycle valve provided by the embodiment of the invention;
fig. 5 is a schematic structural diagram of a deep coal face pressure determination device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The deep coal face pressure judgment method of the invention is described below with reference to fig. 1, and comprises the following steps:
102, carrying out 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;
dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance values and calculating the number of the resistance values in the high-resistance interval to obtain the proportion of the high-resistance interval of the supports in each coal mining cycle;
comparing the last resistance value of the resistance value sequence of each support in each coal mining cycle with a rated resistance value to obtain the opening ratio of a support safety valve in each coal mining cycle;
103, acquiring a pressure-coming rule according to the maximum value of the weighted resistance of the cycle time of each support in a plurality of coal mining cycles, the maximum value of the ratio of the high resistance interval of the support in each coal mining cycle and the maximum value of the opening ratio of the safety valve of the support in each coal mining cycle.
In order to solve the problem of small division of the incoming pressure area of the deep stope, the embodiment of the invention adopts three indexes of cycle time weighted resistance, cycle high-resistance interval proportion and cycle safety valve opening proportion, and converts the index parameter with small division into the index parameter with high division on the basis of not changing the original ore pressure rule, thereby achieving the purpose of really and effectively distinguishing the incoming pressure of the deep stope. The method gives consideration to the pressure of a single support and the total pressure of the working face at the same time, and plays a guiding role in the safety management of the top plate of the deep working face. The method of the embodiment of the invention finds the key judgment index with large deep working face period incoming pressure discrimination, and the cycle time weighted resistance correspondingly converts a plurality of mine pressure data in one coal mining cycle of one bracket into one value, so that the method is simplified and used for replacing the cycle end resistance or the maximum working resistance to distinguish the incoming pressure from the non-incoming pressure, and the discrimination is increased; the circulation high-resistance interval ratio is characterized in that complicated mine pressure data of the whole working face in a single circulation are converted into a value, and the pressure is distinguished from the pressure not in the whole mine pressure; the opening ratio of the circulation safety valve is similar to the ratio characteristic of the circulation high-resistance area, and the opening ratio and the ratio characteristic can represent the weak comparison of the mine pressure during the incoming pressure and the non-incoming pressure.
It should be noted that, in the embodiment of the present invention, the coal mining cycle refers to a cycle coal cutting time, and the support refers to a structure for controlling mine pressure of the coal mining working face, and it can also be generally understood that the resistance value sequence refers to mine pressure data of a deep coal mining working face for a certain period, where the resistance values are divided by a pushing rate or time to press the coal mining working face, including an initial pressure and a periodic pressure. In this embodiment, mine pressure monitoring systems (such as KJ21 mine pressure monitoring systems) are used as basic operation software, and mine pressure data in a certain period is divided into a plurality of cycles by using the basic operation software and cyclic coal cutting time as a unit, so as to obtain cyclic mine pressure data.
It should be noted that the maximum value of the weighted resistance of each support in the plurality of coal mining cycles is actually an interval containing the maximum value, and all the weighted resistance of the cycle time in the interval is related to the incoming pressure rule.
In at least one embodiment of the present invention, the obtaining of the pressure-receiving law according to the cycle time weighted resistance maximum of each rack in a plurality of coal mining cycles, the occupancy maximum of the rack high resistance interval in each coal mining cycle, and the opening ratio maximum of the rack safety valve in each coal mining cycle includes:
establishing a weighted resistance matrix according to the cycle time weighted resistance of each support in a plurality of coal mining cycles; obtaining a high-resistance interval proportion matrix according to the proportion of the high-resistance intervals of the supports in a plurality of coal mining cycles; obtaining a safety valve opening proportion matrix according to the opening proportions of the safety valves of the supports in the plurality of coal mining cycles;
and obtaining a pressure coming rule according to the weighted resistance matrix, the high-resistance interval proportion matrix and the maximum values of the safety valve opening proportion matrix, wherein each maximum value area represents one-time periodic pressure coming, and the cycle times of the two adjacent maximum values are the cutting depth which is the periodic pressure coming step distance. .
It should be noted that, the following method is adopted to obtain the pressure law according to the weighted resistance matrix, the high resistance interval proportion matrix and the maximum value of the safety valve opening proportion matrix:
step 201, drawing the cycle time weighted resistance into a plane cloud chart by using buffer software according to a pressure curve of each support in the same coal mining cycle by using a 1 st group, a 2 nd group, an … th group and an m-th group of supports as vertical coordinates, 1 st group, a 2 nd group, a … th group and an n-th cycle sequence (or a propulsion degree) as horizontal coordinates and corresponding weighted resistance matrixes as basic data, as shown in fig. 3;
step 202, taking the circulation sequence or the advance degree as an abscissa, taking the high-resistance interval proportion matrix and the safety valve opening proportion matrix as an ordinate, and adopting an origin or Excel plotting method to obtain a circulation high-resistance interval proportion histogram and a circulation safety valve opening proportion curve graph, as shown in fig. 4.
Step 203, according to fig. 3 and 4, by using the high resistance area and the high percentage as criteria, the information such as the range of the periodic incoming pressure, the incoming pressure step and the incoming pressure duration can be comprehensively and rapidly determined, wherein the high stress area in fig. 3 represents the incoming pressure range and the incoming pressure duration, and the distance between two adjacent high stress areas is the periodic incoming pressure step; the maximum value area in fig. 4 represents the pressing period, and the advancing distance between two adjacent maximum values is the periodic pressing step distance.
It should be noted that the drawing method recited in the present invention is only a relatively common drawing method, and similar drawing methods, such as a three-dimensional wire frame diagram method, can also apply the data processing of the present invention.
The embodiment of the invention provides a method for displaying a cloud picture, a histogram and a curve chart based on three index parameter analysis, does not change the original characteristics of the mine pressure rule, and enables the periodic incoming pressure rule of a deep stope to be clear and visual. The drawing mode of combining the mine pressure cloud picture with the curve graph and the histogram is adopted, lines are combined with surfaces, the pressure characteristics can be displayed from the trend of the working surface, and the original mine pressure rule is not changed. The automatic accurate analysis of index parameters is realized by adopting a computer programming mode, the automatic display of a cloud picture, a histogram and a curve graph is realized by adopting a computer drawing mode, and the judgment efficiency of the periodic incoming pressure of the deep working face is improved.
In at least one embodiment of the present invention, the 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 includes:
and carrying out weighted average on the resistance value sequence of each support in each coal mining cycle and the curve of time to obtain the cycle time weighted resistance of each support in each coal mining cycle.
It should be noted that the weighted resistance matrix is obtained by the following method:
as shown in FIG. 2, the method is a schematic diagram of a calculation method for weighting the working resistance of two coal mining cycles with time, the embodiment of the invention provides a calculation formula of the cycle time weighted resistance based on the calculus theory, and as can be seen from FIG. 2, the resistance P at the end of two cyclesnAnd the maximum working resistance, the conclusion can be drawn from equation 1: pt2>Pt1If the end-of-cycle resistance and the maximum working resistance are taken as the basis, P is obtainedt2＝Pt1Therefore, the weighted resistance calculation method provided by the invention is closer to the real application environment.
Converting all operating resistance values within a cycle to a cycle time weighted resistance PtOne value, as shown in equation 1:
wherein, the 1 st group of circulating mine pressure data (i.e. mine pressure value sequence) P of the 1 st bracket is used1、P2、…、PnCalculation conversion into cycle time weighted work resistance P11(ii) a 1 st group of circulating mine pressure data P of 2 nd bracket1、P2、…、PnCalculation conversion into cycle time weighted work resistance P21(ii) a 1 st group of circulating mine pressure data P of the mth bracket1、P2、…、PnCalculation conversion into cycle time weighted work resistance Pm1From this, the time-weighted resistance { P } of all scaffolds for the first cycle is obtained11，P21，…，Pm1}. And similarly, calculating and converting the k groups of circulating mine pressure data of all the brackets into circulating time weighted working resistance to obtain a data matrix:
in at least one embodiment of the present invention, the dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance values and calculating the number of the resistance values in the high resistance interval to obtain the percentage of the high resistance interval of the supports in each coal mining cycle includes:
in at least one embodiment of the invention, the resistance value sequence of all the supports in each coal mining cycle is divided into a plurality of sections according to 10% of rated resistance value, the number of the resistance values in the section of 90% of rated resistance value is calculated, and the percentage of the high-resistance section of the supports in each coal mining cycle is obtained according to the percentage of the number of the resistance values in the section of 90% of rated resistance value to the total resistance number of the resistance value sequence. At 10% PeThe high-resistance interval divided for the interval has higher discrimination.
It should be noted that the high-resistance interval proportion matrix is obtained by the following method:
obtaining the mine pressure data of all the brackets in the first cycle, and recording the mine pressure data as t0The number of the main components is one,at 10% PeTo divide between regions, PeCounting the number of the working resistance falling in each interval for the rated resistance of the support, and if the interval is more than or equal to 90 percent PeThe amount of resistance of is t1Then, with (t)1/t0X 100%) as the first cycle, and is noted as t10(ii) a And similarly, counting the circulating mine pressure data to the kth group and recording the data as tk0(ii) a Obtaining a data matrix:
[t10 t20 … tk0]。
in at least one embodiment of the present invention, the comparing the last 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 includes:
and comparing the last 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 the supports with the last resistance value being larger than or equal to the rated resistance value in each coal mining cycle to the total number of the supports, and obtaining the opening proportion of the support safety valve in each coal mining cycle. The safety valve opening criterion of the embodiment of the invention is put forward based on the basic requirements of giving play to the maximum support efficiency of the bracket and protecting the structural member of the bracket
It should be noted that the safety valve opening ratio matrix is obtained by the following method:
with end resistance P of stent circulationn≥PeAs a criterion for opening the safety valve, performing computer programming by adopting a data traversal method, and enabling the 1 st group of circulating mine pressure data P of the 1 st bracket1、P2、…、PnAnd PeGo through the comparison, if Pi(i＝1、2、…、n)≥PeIf yes, then marking as 1, otherwise, marking as 0; in the same way, the 1 st group of circulating mine pressure data P of the 2 nd bracket1、P2、…、PnAnd PeGo through the comparison, if Pi(i＝1、2、…、n)≥PeIf yes, then marking as 1, otherwise, marking as 0; sequentially traversing the circulating mine pressure data of the mth group of supports, summing the obtained results, and recording as l; then (l/m × 100%) as the first cycle's ampereFull valve opening ratio, denoted A10(ii) a And similarly, counting the circulating mine pressure data to the kth group and recording the data as Ak0(ii) a Obtaining a data matrix:
[A10 A20 … Ak0]。
in at least one embodiment of the invention, the pressing rule comprises a pressing range, a pressing step and a pressing duration.
The deep coal face pressure-coming determination device provided by the present invention is described below, and the deep coal face pressure-coming determination device described below and the deep coal face pressure-coming determination method described above may be referred to in correspondence with each other. The deep coal face pressure determination device shown in fig. 5 includes:
the pressure acquisition module 501 is used for acquiring a resistance value sequence of each support in each coal mining cycle;
the index analysis module 502 is configured to perform weighted average on the resistance value sequence of each support in each coal mining cycle to obtain cycle time weighted resistance of each support in each coal mining cycle; dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance values and calculating the number of the resistance values in the high-resistance interval to obtain the proportion of the support high-resistance interval in each coal mining cycle; the support safety valve opening ratio acquisition module is also used for comparing the last resistance value of the resistance value sequence of each support in each coal mining cycle with the rated resistance value to acquire the support safety valve opening ratio in each coal mining cycle;
the pressure-coming determination module 503 is configured to obtain a pressure-coming rule according to the maximum value of the weighted resistance of the cycle time of each rack in the multiple coal mining cycles, the maximum value of the ratio of the high resistance interval of the rack in each coal mining cycle, and the maximum value of the opening ratio of the safety valve of the rack in each coal mining cycle.
In at least one embodiment of the present invention, the index analysis module 502 obtains the pressure law according to the maximum value of the weighted resistance of the cycle time of each rack in a plurality of coal mining cycles, the maximum value of the proportion of the high resistance interval of the rack in each coal mining cycle, and the maximum value of the opening ratio of the safety valve of the rack in each coal mining cycle, including:
establishing a weighted resistance matrix according to the cycle time weighted resistance of each support in a plurality of coal mining cycles; obtaining a high-resistance interval proportion matrix according to the proportion of the high-resistance intervals of the supports in a plurality of coal mining cycles; obtaining a safety valve opening proportion matrix according to the opening proportions of the safety valves of the supports in the plurality of coal mining cycles;
and obtaining an incoming pressure rule according to the weighted resistance matrix, the high-resistance interval proportion matrix and the maximum value of the safety valve opening proportion matrix.
In at least one embodiment of the invention, the pressing rule comprises a pressing range, a pressing step and a pressing duration.
In at least one embodiment of the present invention, the 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 includes:
and carrying out weighted average on the resistance value sequence and the pushing progress curve of each support in each coal mining cycle to obtain the cycle time weighted resistance of each support in each coal mining cycle.
In at least one embodiment of the present invention, the dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance values and calculating the number of the resistance values in the high resistance interval to obtain the percentage of the high resistance interval of the supports in each coal mining cycle includes:
dividing resistance value sequences of all the supports in each coal mining cycle into a plurality of sections according to 10% of rated resistance values, calculating the number of the resistance values in the section of 90% of the rated resistance values, and obtaining the percentage of the high-resistance sections of the supports in each coal mining cycle according to the percentage of the number of the resistance values in the section of 90% of the rated resistance values to the total resistance number of the resistance value sequences.
In at least one embodiment of the present invention, the comparing the last 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 includes:
and comparing the last 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 the supports with the last resistance value being larger than or equal to the rated resistance value in each coal mining cycle to the total number of the supports, and obtaining the opening proportion of the support safety valve in each coal mining cycle.
In the embodiment of the present invention, the three indexes of the cycle time weighted resistance, the cycle high resistance interval ratio, and the opening ratio of the cycle safety valve may be used as the determination indexes of the periodic incoming pressure of the deep working face, or the three indexes may be arbitrarily combined, or parameters such as the cycle resistance increasing rate acting similarly to this may be combined as the determination indexes to perform the determination.
Fig. 6 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 6: a processor (processor)610, a communication Interface (Communications Interface)620, a memory (memory)630 and a communication bus 640, wherein the processor 610, the communication Interface 620 and the memory 630 communicate with each other via the communication bus 640. The processor 610 may invoke logic instructions in the memory 630 to perform a deep coal face weight determination method comprising:
acquiring a resistance value sequence of each support in each coal mining cycle;
carrying out 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;
dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance values and calculating the number of the resistance values in the high-resistance interval to obtain the proportion of the high-resistance interval of the supports in each coal mining cycle;
comparing the last resistance value of the resistance value sequence of each support in each coal mining cycle with a rated resistance value to obtain the opening ratio of a support safety valve in each coal mining cycle;
and obtaining the pressure law according to the maximum value of the weighted resistance of the cycle time of each support in a plurality of coal mining cycles, the maximum value of the ratio of the high resistance interval of the support in each coal mining cycle and the maximum value of the opening ratio of the safety valve of the support in each coal mining cycle.
In addition, the logic instructions in the memory 630 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute 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), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being storable on a non-transitory computer-readable storage medium, the computer program, when executed by a processor, being capable of executing the deep coal face pressure determination method provided by the above methods, the method including:
acquiring a resistance value sequence of each support in each coal mining cycle;
carrying out 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;
dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance values and calculating the number of the resistance values in the high-resistance interval to obtain the proportion of the high-resistance interval of the supports in each coal mining cycle;
comparing the last resistance value of the resistance value sequence of each support in each coal mining cycle with a rated resistance value to obtain the opening ratio of a support safety valve in each coal mining cycle;
and obtaining the pressure law according to the maximum value of the weighted resistance of the cycle time of each support in a plurality of coal mining cycles, the maximum value of the ratio of the high resistance interval of the support in each coal mining cycle and the maximum value of the opening ratio of the safety valve of the support in each coal mining cycle.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements a deep coal face pressure determination method provided by performing the above methods, the method comprising:
acquiring a resistance value sequence of each support in each coal mining cycle;
carrying out 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;
dividing the resistance value sequence of all the supports in each coal mining cycle into intervals according to the rated resistance values and calculating the number of the resistance values in the high-resistance interval to obtain the proportion of the high-resistance interval of the supports in each coal mining cycle;
comparing the last resistance value of the resistance value sequence of each support in each coal mining cycle with a rated resistance value to obtain the opening ratio of a support safety valve in each coal mining cycle;
and obtaining the pressure law according to the maximum value of the weighted resistance of the cycle time of each support in a plurality of coal mining cycles, the maximum value of the ratio of the high resistance interval of the support in each coal mining cycle and the maximum value of the opening ratio of the safety valve of the support in each coal mining cycle.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
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