CN110991824A - Method and device for identifying coal rock impact tendency and storage medium - Google Patents

Method and device for identifying coal rock impact tendency and storage medium Download PDF

Info

Publication number
CN110991824A
CN110991824A CN201911127429.6A CN201911127429A CN110991824A CN 110991824 A CN110991824 A CN 110991824A CN 201911127429 A CN201911127429 A CN 201911127429A CN 110991824 A CN110991824 A CN 110991824A
Authority
CN
China
Prior art keywords
impact
coal rock
cohesion
tendency
identifying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201911127429.6A
Other languages
Chinese (zh)
Other versions
CN110991824B (en
Inventor
王宏伟
张越
张少朕
邓代新
姜耀东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China University of Mining and Technology Beijing CUMTB
Original Assignee
China University of Mining and Technology Beijing CUMTB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China University of Mining and Technology Beijing CUMTB filed Critical China University of Mining and Technology Beijing CUMTB
Priority to CN201911127429.6A priority Critical patent/CN110991824B/en
Publication of CN110991824A publication Critical patent/CN110991824A/en
Application granted granted Critical
Publication of CN110991824B publication Critical patent/CN110991824B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
    • G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/02—Agriculture; Fishing; Mining
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive

Abstract

The invention discloses a method, a device and a storage medium for identifying coal rock impact tendency, and relates to the fields of geotechnical engineering and mining engineering. The method comprises the following steps: determining an identification standard for identifying the impact tendency of the coal rock through the cohesion of the coal rock; measuring the cohesion of the coal rock to be identified; and comparing the cohesive force with a preset threshold value, and identifying the impact tendency of the coal rock according to an identification standard. The method provided by the invention is suitable for identifying the impact tendency of the coal rock, has the advantages of simple and efficient identification process, and improves the accuracy of identifying the impact tendency of the coal rock.

Description

Method and device for identifying coal rock impact tendency and storage medium
Technical Field
The invention relates to the field of geotechnical engineering and mining engineering, in particular to a method, a device and a storage medium for identifying coal rock impact tendency.
Background
The deep coal rock burst problem is an important problem in mine deep rock mechanics, the deep coal rock burst refers to a dynamic phenomenon that coal rock around a roadway or a working face is suddenly and violently damaged due to instant release of elastic deformation energy, and the deep coal rock burst has strong destructiveness and is one of major disasters of coal mines.
Rock burst can now be described in terms of impact tendency. In current standards in the coal industry, the impact propensity of coal petrography is determined by measuring the following criteria, including: compressive strength R of single axisCImpact energy index KEElastic energy index WETAnd dynamic destruction time DTHowever, the current methods for identifying coal rock impact tendencies have the following disadvantages:
firstly, the elastic energy index only considers the part of the coal sample before reaching the peak value in the uniaxial compression process, the dynamic failure time only considers the part of the coal sample after reaching the peak value in the uniaxial compression process, and the uniaxial compression strength only considers one point of the peak value. The three indexes can not comprehensively consider the whole process of the stress-strain curve of the coal; secondly, the above indexes only consider a single aspect of impact tendency, some indexes show that the coal sample is strong impact, some indexes show weak impact, even no impact, so that the phenomena of large discreteness or contradiction between results can exist when the indexes are used for identification, and when the indexes are particularly dangerous, the phenomena of underestimation exists in evaluation, so that the impact tendency of the identified coal is not accurate and objective enough.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a method, a device and a storage medium for identifying coal rock impact tendency.
The technical scheme for solving the technical problems is as follows:
a method for identifying coal rock impact propensity, comprising:
identifying the cohesion of the coal rock to be identified;
and comparing the cohesive force with a preset threshold value, and obtaining the impact tendency of the coal rock according to a comparison result.
The invention has the beneficial effects that: according to the method provided by the invention, the cohesion of the coal rock is identified, and the impact tendency of the coal rock is determined according to the identified cohesion, compared with the traditional coal rock impact tendency identification method, the method does not need to carry out determination by a plurality of indexes, has the advantage of rapid identification process, and the cohesion has a certain functional relationship with the traditional index for determining the impact tendency of the coal rock, and the cohesion can fully reflect the multi-aspect influence of the existing index on the impact tendency of the coal rock, so that the accuracy of the identification of the impact tendency of the coal rock is improved.
Another technical solution of the present invention for solving the above technical problems is as follows:
a storage medium having stored therein instructions which, when read by a computer, cause the computer to carry out a method for identifying a coal rock impact propensity according to the above technical solution.
Another technical solution of the present invention for solving the above technical problems is as follows:
an apparatus for identifying coal rock impact tendencies, comprising:
a memory for storing a computer program;
and the processor is used for executing the computer program to realize the method for identifying the coal rock impact tendency according to the technical scheme.
Advantages of additional aspects 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
FIG. 1 is a schematic flow chart of an embodiment of a method for identifying coal rock impact propensity according to the present invention;
FIG. 2 is a schematic diagram of a pre-peak curve and a pressure relief curve of a coal sample provided by an embodiment of the method for identifying coal rock impact propensity according to the present invention;
FIG. 3 is a schematic diagram of a full stress-strain curve of a coal sample provided by an embodiment of the method for identifying coal rock impact propensity according to the present invention;
FIG. 4 is a graph illustrating uniaxial compressive strength versus cohesion curves provided by other embodiments of the method for identifying coal rock impact propensity of the present invention;
FIG. 5 is a schematic diagram of impact energy index versus cohesion curves provided by other embodiments of the method for identifying coal rock impact propensity of the present invention;
FIG. 6 is a graph illustrating elastic energy index versus cohesion provided by another embodiment of the method for identifying coal rock impact propensity according to the present invention;
FIG. 7 is a graph illustrating dynamic failure time versus cohesion provided by another embodiment of the method for identifying coal rock impact propensity of the present invention;
fig. 8 is a schematic structural framework diagram provided by an embodiment of the device for identifying coal rock impact tendency of the invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
As shown in fig. 1, a schematic flow chart is provided for an embodiment of the method for identifying coal rock impact tendentiousness according to the present invention, and the method includes:
and S1, determining an identification standard for identifying the impact tendency of the coal rock through the cohesive force of the coal rock.
And S2, measuring the cohesion of the coal rock to be identified.
And S3, comparing the cohesive force with a preset threshold value, and identifying the impact tendency of the coal rock according to the identification standard.
It should be understood that the coal rock described herein may refer to a cylindrical briquette or rock sample having a diameter of 50mm and a height of 100mm for use in the impact susceptibility testing.
Wherein the predetermined threshold value may be determined according to an authentication criterion. For example, assuming that the preset threshold may include a first threshold and a second threshold, when the cohesion is less than the first threshold, the impact tendency of the coal rock is obtained as no impact; when the cohesive force is greater than or equal to a first threshold value and less than a second threshold value, obtaining that the impact tendency of the coal rock is weak impact; and when the cohesive force is greater than a second threshold value, obtaining that the impact tendency of the coal rock is strong impact.
It should be noted that, the method for identifying the cohesion of the coal rock to be identified may select the existing cohesion identification and determination method according to actual requirements, for example, the cohesion of the coal rock to be identified may be measured by a triaxial compression experiment, and details are not repeated herein.
It should be noted that, in the current standard of the coal industry in China, 4 indexes for representing the impact tendency of coal rock are available, namely uniaxial compressive strength RCImpact energy index KEElastic energy index WETAnd dynamic destruction time DT(ii) a In a uniaxial compression experiment, the uniaxial compressive strength is the peak strength of a stress-strain curve; the dynamic failure time refers to the time from ultimate strength to complete failure of the coal test piece, the elastic energy index refers to the ratio of elastic deformation energy to plastic deformation energy of the coal test piece which is completely unloaded when the stress reaches 75-85% of the strength in a uniaxial compression state, and the impact energy index refers to the ratio of the deformation energy accumulated before a peak value to the deformation energy consumed after the peak value in a full stress-strain curve of the coal test piece in the uniaxial compression state.
The impact tendency of the coal rock is comprehensively measured according to the four indexes, but the current evaluation method has the following defects: firstly, the elastic energy index only considers partial deformation of the coal rock before reaching the peak value in the uniaxial compression process; the dynamic destruction time only considers the part of the coal rock after reaching the peak value in the uniaxial compression process; the uniaxial compressive strength only takes one point of the stress-strain curve peak into consideration; the impact energy index is not easy to obtain a full stress-strain curve, although mechanical properties before and after the peak of the stress-strain curve are considered. Therefore, the four indexes for judging the impact tendency in the prior art have limitations; secondly, each index only evaluates the strength of the coal rock impact tendency in a unilateral manner, so that the evaluation result may have the phenomenon of larger discreteness or mutual contradiction of results. Although a fuzzy evaluation method can be adopted, when the index shows that the impact tendency is particularly dangerous, the index is averaged by other indexes, so that the evaluation has an underestimation phenomenon, and the objective accuracy of measuring the impact tendency is lost.
Based on this, the inventor carries out a large number of experiments, and finds that a certain functional relationship exists between the cohesion and the 4 indexes, so in order to more accurately measure the impact tendency of the coal rock, the invention provides a novel method for measuring the impact tendency of the coal rock, namely, the impact tendency of the coal rock is evaluated by using the cohesion of a single index, and the impact tendency of the coal rock can be conveniently and accurately obtained by measuring the cohesion of the coal rock.
The principle that the cohesion can be used to evaluate the impact tendency of the coal rock is described below with reference to fig. 2 and 3, taking a coal sample as an example.
Fig. 2 is a schematic diagram of a front peak curve and a pressure relief curve of a coal sample, and fig. 3 is a schematic diagram of a full stress strain curve of the coal sample, which can be divided into a front peak and a rear peak. According to the image, the functional relations between the uniaxial compression strength and the pre-peak curve, the pressure relief curve and the post-peak curve of the coal sample can be respectively set as follows:
y＝E1x
y＝E2x-b2
y＝-E3x+b3
wherein E1，E2，E3Is the slope of the curve, b2、b3Is a constant coefficient of the equation;
according to the invention, a coal sample parameter database is established by analyzing physical and mechanical parameters and impact tendency identification indexes of a plurality of coal sample samples, and E can be obtained1，E2，E3And uniaxial compressive strength RCThe relationships between the two are respectively:
E1＝k1Rc+e1
E2＝k2Rc+e2
Figure BDA0002277292290000066
wherein k is1，k2，k3，e1，e2And e3Are the constant coefficients of these three equations.
On the basis, the invention establishes an impact energy index KEElastic energy index WETAfter-peak strain εpostThe relation between the cohesive force C and the physical mechanical parameter is shown as follows:
Figure BDA0002277292290000061
Figure BDA0002277292290000062
Figure BDA0002277292290000063
wherein the content of the first and second substances,
Figure BDA0002277292290000064
is the rubbing angle.
It is understood that the post-peak strain εpostAnd DtAll the parameters are in the process of explaining the span from the peak value to the complete destruction of the coal sample, and a direct ratio relationship exists between the two parameters, so DtThe relation to the cohesion C may be expressed as εpostExpressed in relation to the cohesion C.
The uniaxial compressive strength R is also knownCThe relationship with the cohesive force C is:
Figure BDA0002277292290000065
therefore, the uniaxial compression strength R of the four impact tendency identification indexes can be obtained by combining the contentsCImpact energy index KEElastic energy index WETAnd dynamic destruction time DTAnd the relation with the cohesive force C, namely the theoretical basis of evaluating the impact tendency of the coal rock by the cohesive force.
According to the method provided by the embodiment, the cohesion of the coal rock is identified, and the impact tendency of the coal rock is determined according to the identified cohesion, compared with the traditional coal rock impact tendency identification method, the method does not need multiple indexes for measurement, has the advantage of rapid identification process, has a certain functional relationship between the cohesion and the traditional index for measuring the impact tendency of the coal rock, and can fully reflect the multi-aspect influence of the existing index on the impact tendency of the coal rock, so that the accuracy of the identification of the impact tendency of the coal rock is improved.
Optionally, in some embodiments, the determining the cohesion of the coal rock to be identified specifically includes:
and (4) determining the coal rock to be identified through a triaxial compression test to obtain the cohesion of the coal rock to be identified.
Optionally, in some embodiments, comparing the cohesion with a preset threshold value, and identifying the impact tendency of the coal rock according to the identification standard specifically includes:
comparing the cohesion with a preset first threshold value and a preset second threshold value respectively, wherein the first threshold value and the second threshold value are determined according to the identification standard;
when C is less than T1Then, the impact tendency of the obtained coal rock is no impact;
when T is1≤C＜T2Then obtaining the weak impact of the impact tendency of the coal rock;
when C is more than or equal to T2Then, obtaining strong impact of the impact tendency of the coal rock;
wherein, T1Is a first threshold value, T2Is a second threshold value, and T1＜T2And C is cohesion.
For example, as shown in table 1, an exemplary impact tendency judgment criterion is given.
TABLE 1 judgment criteria for impact tendency
Figure BDA0002277292290000071
As can be seen from Table 1, when the cohesive force is less than 1.5MPa, the coal rock to be identified has no impact tendency; when the cohesive force is between 1.5MPa and 4.0MPa, the coal rock to be identified has a weak impact tendency; when the cohesive force is more than 4.0MPa, the coal rock to be identified has stronger impact tendency.
It should be understood that the focus of the present invention is to identify the impact tendentiousness of the coal rock through the cohesion, and the specific cohesion corresponds to which level of impact tendentiousness, which can be set according to the actual requirements, for example, the impact tendentiousness can also be divided into 4 levels, which are respectively no impact, weak impact, strong impact and strong impact, and respectively correspond to different cohesion ranges, which can be set according to the actual requirements, and will not be described herein again.
In addition, besides obtaining quantitative results of impact tendency, the impact tendency can be represented by the value of the cohesion force, and the larger the value of the cohesion force, the larger the impact tendency of the coal rock is shown.
Optionally, in some embodiments, the preset threshold is determined according to the following steps:
carrying out a uniaxial compression experiment on the target coal rock, and determining a preset index of the target coal rock, wherein the preset index is the existing national standard for evaluating the impact tendency of the coal rock; determining the corresponding relation between the cohesive force and the impact tendency according to the corresponding relation between the preset index and the cohesive force;
and determining a preset threshold according to the corresponding relation between the cohesive force and the impact tendency.
For uniaxial compressive strength RCWhen R isC(ii) an impact propensity of no impact < 7.0; when R is more than or equal to 7.0CAt < 14.0, the impact propensity is weak impact; when R isCImpact propensity is strong impact > 14.0.
When R isCWhen the value is 7.0, the corresponding cohesive force C is 1.9; when R isCWhen the value is 14.0, the corresponding cohesive force C is 3.8.
For impact energy index KEWhen K isE(ii) an impact propensity of no impact < 1.5; when K is more than or equal to 1.5EWhen the impact tendency is less than 5.0, the impact tendency is weak impact; when K isEImpact propensity is strong impact > 5.0.
When K isEWhen the value is 1.5, the corresponding cohesive force C is 1.8; when K isEWhen the value is 5.0, the corresponding cohesive force C is 4.1.
For elastic energy index WETWhen W isETWhen the impact tendency is less than 2.0, the impact tendency is no impact; when W is more than or equal to 2.0ETWhen the impact tendency is less than 5.0, the impact tendency is weak impact; when W isETImpact propensity is strong impact > 5.0.
When W isETWhen the cohesive force is 2.0, the corresponding cohesive force C is 1.5; when W isETWhen 5.0, the corresponding cohesive force C is 3.9.
For dynamic destruction time DTWhen D is presentT(ii) an impact propensity of no impact at < 50; when D is more than or equal to 50TWhen the impact tendency is less than 500, the impact tendency is weak impact; when D is presentTAt > 500, the impact propensity is strong impact.
When D is presentTWhen 50, the corresponding cohesive force C is 1.8; when D is presentTAt 500, the corresponding cohesion C is 4.1. Then, according to the relationship between the above 4 indexes and the cohesion, after comprehensive analysis treatment, the identification standard of the cohesion can be obtained as follows: when C is less than 1.5, the impact tendency is no impact; when C is more than or equal to 1.5 and less than 4.0, the impact tendency is weak impact; when C > 4.0, the impact tendency is strong impact.
For example, the weight may be determined according to the degree of influence of the 4 indicators on the impact tendency, the determination standard of the cohesion may be determined according to the weight, or a more accurate determination standard of the cohesion may be obtained by other data processing methods, which is not described herein again.
It should be understood that the above is merely exemplary and does not represent actual numerical values.
Optionally, in some embodiments, the preset index includes: uniaxial compressive strength, impact energy index, elastic energy index, or dynamic failure time.
As shown in FIGS. 4 to 7, uniaxial compressive strength R is given in orderCImpact energy index KEElastic energy index WETAnd dynamic destruction time DTGraph with corresponding cohesion.
In FIGS. 4 to 7, the horizontal axes are all cohesionForce C in MPa and uniaxial compressive strength R on the vertical axis of FIG. 4CImpact energy index K of FIG. 5EThe vertical axis of FIG. 6 is the elastic energy index WETThe vertical axis of FIG. 7 is the dynamic destruction time DT。
Discrete points in each graph are measured values obtained by uniaxial compression experiments, a solid line is a curve obtained by fitting, and a dotted line is a fitting curve of theoretical values. According to the impact tendency evaluation criteria of each index, the corresponding numerical value in the graph can be divided into three regions by a dotted line, wherein the three regions are a strong impact region, a weak impact region and a no impact region from top to bottom. The intersection point of the fitting curve and the region boundary is found at the position of the horizontal axis, and the corresponding relation between the cohesion and the impact tendency can be obtained through comprehensive analysis, so that the threshold value is determined.
Optionally, in some embodiments, determining the correspondence between the cohesion and the impact tendency according to the correspondence between the preset index and the impact tendency specifically includes:
establishing a functional relation between preset indexes of the target coal rock and corresponding cohesion, and drawing a relation curve graph of the preset indexes and the corresponding cohesion;
marking the evaluation ranges of preset indexes and impact tendentiousness in a curve graph;
and determining the corresponding relation between the cohesive force and the impact tendency according to the evaluation range.
Optionally, in some embodiments, determining the preset threshold according to the correspondence between the cohesion and the impact tendency specifically includes:
the value of the cohesion at the end of the evaluation range was taken as a preset threshold.
It is understood that some or all of the alternative embodiments described above may be included in some embodiments.
In another embodiment of the present invention, there is provided a storage medium having instructions stored therein, which when read by a computer, cause the computer to perform the method for identifying coal rock impact propensity as described in any of the above embodiments.
In another embodiment of the present invention, as shown in fig. 8, there is provided an apparatus for identifying coal rock impact tendencies, comprising:
a memory 1 for storing a computer program;
a processor 2 for executing a computer program for implementing a method for identifying a coal rock impact propensity as described in any of the embodiments above.
The reader should understand that in the description of this specification, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described method embodiments are merely illustrative, and for example, the division of steps into only one logical functional division may be implemented in practice in another way, for example, multiple steps may be combined or integrated into another step, or some features may be omitted, or not implemented.
The above method, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including 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: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. A method for identifying coal rock impact propensity, comprising:
determining an identification standard for identifying the impact tendency of the coal rock through the cohesion of the coal rock;
measuring the cohesion of the coal rock to be identified;
and comparing the cohesive force with a preset threshold value, and identifying the impact tendency of the coal rock according to the identification standard.
2. The method for identifying the coal rock impact tendency according to claim 1, wherein the determination of the cohesion of the coal rock to be identified specifically comprises:
and determining the coal rock to be identified through a triaxial compression test to obtain the cohesion of the coal rock to be identified.
3. The method for identifying the impact tendency of the coal rock according to claim 1, wherein the cohesion is compared with a preset threshold, and the impact tendency of the coal rock is identified according to the identification standard, and the method specifically comprises the following steps:
comparing the cohesion with a preset first threshold value and a preset second threshold value respectively, wherein the first threshold value and the second threshold value are determined according to the identification standard;
when C is less than T1Then, obtaining the impact tendency of the coal rock as no impact;
when T is1≤C＜T2Then obtaining that the impact tendency of the coal rock is weak impact;
when C is more than or equal to T2Then obtaining that the impact tendency of the coal rock is strong impact;
wherein, T1Is a first threshold value, T2Is a second threshold value, and T1＜T2And C is cohesion.
4. The method for identifying coal petrography impact tendencies according to any of claims 1 to 3, characterized in that said preset threshold is determined according to the following steps:
carrying out a uniaxial compression experiment on a target coal rock, and determining a preset index of the target coal rock, wherein the preset index is the existing national standard for evaluating the impact tendency of the coal rock; determining the corresponding relation between the cohesive force and the impact tendency according to the corresponding relation between the preset index and the cohesive force;
and determining the preset threshold according to the corresponding relation between the cohesive force and the impact tendency.
5. The method for identifying coal petrography impact tendencies of claim 4, wherein the preset indicators include: uniaxial compressive strength, impact energy index, elastic energy index, or dynamic failure time.
6. The method for identifying coal petrography impact tendentiousness according to claim 4, wherein the determining the corresponding relation between cohesion and impact tendentiousness according to the corresponding relation between the preset index and impact tendentiousness specifically comprises:
establishing a functional relation between the preset index of the target coal rock and the corresponding cohesion, and drawing a relation curve chart of the preset index and the corresponding cohesion;
marking the evaluation ranges of the preset indexes and the impact tendency in the curve graph;
and determining the corresponding relation between the cohesive force and the impact tendency according to the evaluation range.
7. The method for identifying coal petrography impact tendencies according to claim 6, wherein the determining the preset threshold value according to the corresponding relationship between cohesion and impact tendencies specifically comprises:
and taking the value of the cohesion at the end point of the evaluation range as a preset threshold value.
8. A storage medium having stored therein instructions which, when read by a computer, cause the computer to carry out a method for identifying a coal rock impact propensity according to any one of claims 1 to 7.
9. An apparatus for identifying coal rock impact tendencies, comprising:
a memory for storing a computer program;
a processor for executing the computer program for carrying out the method for identifying coal rock impact propensity according to any one of claims 1 to 7.
CN201911127429.6A 2019-11-18 2019-11-18 Method, device and storage medium for identifying coal rock impact tendency Active CN110991824B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911127429.6A CN110991824B (en) 2019-11-18 2019-11-18 Method, device and storage medium for identifying coal rock impact tendency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911127429.6A CN110991824B (en) 2019-11-18 2019-11-18 Method, device and storage medium for identifying coal rock impact tendency

Publications (2)

Publication Number Publication Date
CN110991824A true CN110991824A (en) 2020-04-10
CN110991824B CN110991824B (en) 2023-06-23

Family

ID=70084819

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911127429.6A Active CN110991824B (en) 2019-11-18 2019-11-18 Method, device and storage medium for identifying coal rock impact tendency

Country Status (1)

Country Link
CN (1) CN110991824B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112557167A (en) * 2020-12-18 2021-03-26 山东科技大学 In-situ coal impact tendency observation method
CN114112740A (en) * 2021-11-12 2022-03-01 中国矿业大学(北京) Portable coal rock impact tendency testing device and method

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
宫凤强;叶豪;罗勇;: "低加载率范围内煤岩组合体冲击倾向性的率效应试验研究" *
张伟强;王恩元;李学龙;孔祥国;李国爱: "基于海明距离法的煤岩冲击倾向性评价" *
支光辉;黄春光;: "跃进煤矿煤岩冲击倾向性试验研究" *
蔡武;窦林名;曹安业;李许伟;徐长厚: "煤层冲击倾向性试验数据分析系统的编制与应用" *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112557167A (en) * 2020-12-18 2021-03-26 山东科技大学 In-situ coal impact tendency observation method
CN114112740A (en) * 2021-11-12 2022-03-01 中国矿业大学(北京) Portable coal rock impact tendency testing device and method

Also Published As

Publication number Publication date
CN110991824B (en) 2023-06-23

Similar Documents

Publication Publication Date Title
CN110991824A (en) Method and device for identifying coal rock impact tendency and storage medium
Klotz et al. On the identification of critical state lines for sands
CN106769456A (en) Fully graded concrete long-term behaviour test device and method under a kind of load of long duration
CN110018072B (en) Hyperelastic material constitutive model parameter conical pressing-in measuring method
CN113051727B (en) Brittleness evaluation method and system based on rock pre-peak crack initiation and post-peak stress characteristics
CN107022994A (en) A kind of miniature dynamic spy instrument and method of testing
CN116307939B (en) Cement pole quality intelligent pre-screening analysis system
CN110044718B (en) Rock burst tendency grade discrimination method based on uniaxial compression hysteresis ratio index
RU2599069C1 (en) Method of determining endurance limit of material at tension-compression
CN107843552A (en) The quantitative detecting method of filler grain and basal body interface dehumidification after propellant moisture absorption
RU2619383C2 (en) Determination method of soil strength characteristics in stress relaxation mode
CN116106125B (en) Method for evaluating brittleness degree of rock
CN111754563A (en) Method for automatically measuring percentage of section shearing area in drop weight tearing test
Manafi et al. Closure to “Discussion of ‘Determining Soil Plasticity Utilizing Manafi Method and Apparatus’ by MSG Manafi, A. Deng, A. Taheri, MB Jaksa, and N. HB”
RU2609817C1 (en) Method of mechanical tests of metal
CN115326565B (en) Rock material stress threshold value calculation method based on energy difference in loading process
Tjondro et al. Non-linier Compression Stress-strain Curve Model for Hardwood
CN109991097A (en) Rock Loading ami deloading response ratio based on damage strength plays height method of discrimination
CN109991096A (en) Rock Under Uniaxial Compression based on damage strength has compressed height method of discrimination
Albuquerque et al. A unified approach for evaluating mechanical compression tests for polymer bead foams
Lin et al. The application of flow stress model to sheet metal forming simulation
CN115015087A (en) Method, device, apparatus and medium for measuring particle softening degree
Moss et al. Comparing liquefaction procedures in the US and China
Vojtasík Assessment of shear strength parameters of soil from load micropile tests
Yang et al. Indentation hardness test methods for bamboo

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant