Method and device for evaluating coal impact propensity based on acoustic emission energy

Abstract

The present disclosure relates to the technical field of mine coal and rock dynamic disaster prevention and control, and particularly relates to a coal impact tendency evaluation method based on acoustic emission energy. The method comprises: under the condition that a first coal sample is subjected to a preset force, obtaining an elastic energy index of the first coal sample based on acoustic emission characteristics and stress-strain characteristics; according to the stress-strain characteristics, obtaining an impact energy index of the first coal sample; according to a stress-time curve of the coal sample, obtaining uniaxial compressive strength and a failure duration of the first coal sample; and using an impact tendency evaluation method, evaluating the impact tendency of the first coal sample according to the elastic energy index, the impact energy index, the uniaxial compressive strength and the failure duration, and obtaining the impact tendency of the first coal sample. The present disclosure can improve the accuracy and convenience of coal sample impact tendency evaluation.

Description

Technical Field

[0001] This disclosure relates to the field of coal and rock dynamic disaster prevention and control technology in mines, and in particular to an evaluation method for coal impact tendency based on acoustic emission energy. Background Technology

[0002] The increasing depth and intensity of mining have exacerbated the problem of rockbursts in coal mines, hindering safe and efficient mining and threatening the lives and property of miners underground. As a foundation for rockburst prevention, thorough rockburst tendency testing and evaluation are necessary before mine construction, new coal seam mining, and new mining area development. However, the repeated loading and unloading tests required for rockburst tendency testing and evaluation make the process cumbersome, resulting in poor accuracy and convenience. Summary of the Invention

[0003] This disclosure provides a method for evaluating coal impact tendency based on acoustic emission energy, which can improve the accuracy and convenience of coal sample impact tendency evaluation. The technical solution of this disclosure is as follows:

[0004] According to a first aspect of the present disclosure, a method for evaluating coal impact tendency based on acoustic emission energy is provided, comprising:

[0005] When the first coal sample is subjected to a preset loading force, the elastic energy index of the first coal sample is obtained based on acoustic emission characteristics and stress-strain characteristics.

[0006] Based on the stress-strain characteristics, the impact energy index of the first coal sample is obtained;

[0007] Based on the stress-time relationship curve of the coal sample, the uniaxial compressive strength and failure time of the first coal sample are obtained;

[0008] An impact tendency evaluation method is adopted to evaluate the impact tendency of the first coal sample based on the elastic energy index, impact energy index, uniaxial compressive strength and failure time, so as to obtain the impact tendency of the first coal sample.

[0009] According to some embodiments, obtaining the elastic energy index of the first coal sample based on the cumulative acoustic emission energy and stress-strain characteristics when the first coal sample is subjected to a preset loading force includes:

[0010] When the first coal sample is subjected to a preset loading force, the first input energy is obtained based on the stress-strain characteristics and pre-peak data of the first coal sample.

[0011] Based on the cumulative acoustic emission energy corresponding to the pre-peak stage and the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy, the first dissipated energy of the first coal sample during the loading of the preset force is obtained.

[0012] Based on the first input energy and the first dissipated energy, the first elastic energy of the first coal sample during the loading of a preset force is obtained;

[0013] The elastic energy index of the first coal sample is obtained based on the first elastic energy and the first dissipated energy.

[0014] According to some embodiments, the method further includes:

[0015] Under the condition that at least one second coal sample is subjected to uniaxial loading and unloading forces, obtain the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy.

[0016] According to some embodiments, obtaining the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy when at least one second coal sample is under uniaxial loading and unloading force conditions includes:

[0017] When at least one second coal sample is under uniaxial loading and unloading force conditions, the axial stress set and strain set corresponding to any second coal sample are obtained according to the second input energy.

[0018] Based on the axial stress set, the strain set, and the unloading stress-strain curve of any second coal sample, the second elastic energy corresponding to any second coal sample is obtained.

[0019] Obtain the third input energy corresponding to any second coal sample under uniaxial loading force;

[0020] Based on the third input energy and the second elastic energy, obtain the second dissipated energy of any second coal sample under uniaxial loading force.

[0021] Based on the third input energy and the second dissipated energy, a quantitative relationship between the cumulative acoustic emission energy and the dissipated energy is obtained.

[0022] According to some embodiments, obtaining the impact energy index of the first coal sample based on the stress-strain characteristics includes:

[0023] Based on the stress-strain characteristics, the elastic modulus of the first coal sample during the loading of a preset force is obtained, wherein the elastic modulus is used to indicate the modulus of the first input energy of the first coal sample during the loading of the preset force.

[0024] Obtain the softening modulus corresponding to the first coal sample, wherein the softening modulus is used to indicate the modulus of the first dissipated energy of the first coal sample during the loading of a preset force;

[0025] The ratio of the elastic modulus to the softening modulus is used as the impact energy index of the first coal sample.

[0026] According to some embodiments, the method further includes:

[0027] Obtain the environmental information corresponding to the first coal sample;

[0028] The environmental information is used to correct the impact tendency of the first coal sample, and the corrected impact tendency is obtained.

[0029] According to some embodiments, the method further includes:

[0030] Obtain the coal sample information corresponding to the first coal sample;

[0031] Based on the coal sample information, the loading information corresponding to the first coal sample is obtained, wherein the loading information includes the force loading method and the preset force.

[0032] According to a second aspect of the present disclosure, a device for evaluating coal impact tendency based on acoustic emission energy is provided, comprising:

[0033] The index acquisition unit is used to acquire the elastic energy index of the first coal sample based on acoustic emission characteristics and stress-strain characteristics when the first coal sample is subjected to a preset loading force.

[0034] The index acquisition unit is also used to acquire the impact energy index of the first coal sample based on the stress-strain characteristics.

[0035] The data acquisition unit is used to obtain the uniaxial compressive strength and failure time of the first coal sample based on the stress-time relationship curve of the coal sample.

[0036] The tendency evaluation unit is used to evaluate the impact tendency of the first coal sample by adopting the impact tendency evaluation method based on the elastic energy index, impact energy index, uniaxial compressive strength and failure time, and obtain the impact tendency of the first coal sample.

[0037] According to a third aspect of the present disclosure, an electronic device is provided, comprising:

[0038] processor;

[0039] Memory used to store the processor's executable instructions;

[0040] The processor is configured to execute the instructions to implement the coal impact tendency evaluation method based on acoustic emission energy as described in any one of the preceding aspects.

[0041] According to a fourth aspect of the present disclosure, a storage medium is provided that, when instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to perform any of the preceding aspects of the evaluation method for coal impact tendency based on acoustic emission energy.

[0042] According to a fifth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the method described in any one of the preceding aspects.

[0043] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0044] In some or related embodiments, the elastic energy index of the first coal sample is obtained based on acoustic emission characteristics and stress-strain characteristics when the first coal sample is subjected to a preset loading force; the impact energy index of the first coal sample is obtained based on the stress-strain characteristics; the uniaxial compressive strength and failure time of the first coal sample are obtained based on the stress-time relationship curve of the coal sample; and the impact tendency evaluation method is used to evaluate the impact tendency of the first coal sample based on the elastic energy index, impact energy index, uniaxial compressive strength, and failure time to obtain the impact tendency of the first coal sample. Therefore, characteristic information and evaluation parameters can be obtained in advance, and the impact tendency evaluation can be performed directly based on the corresponding evaluation parameters without repeated loading and unloading tests. This reduces the high failure rate of loading and unloading tests and the need for repeated tests, reduces the cumbersome steps of loading and unloading tests, improves the efficiency of coal sample impact tendency evaluation, and reduces the need for manual determination of impact tendency evaluation based on test results. This reduces the subjectivity and randomness of impact tendency evaluation and improves the accuracy and convenience of coal sample impact tendency evaluation.

[0045] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0046] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure, and are not intended to unduly limit this disclosure.

[0047] Figure 1 This is a flowchart of the first method for evaluating coal impact tendency based on acoustic emission energy provided in this disclosure embodiment;

[0048] Figure 2 This is a flowchart of the second method for evaluating coal impact tendency based on acoustic emission energy provided in this disclosure embodiment;

[0049] Figure 3 This is a flowchart of the third method for evaluating coal impact tendency based on acoustic emission energy provided in this disclosure embodiment;

[0050] Figure 4 This is a schematic diagram illustrating an example of strain and stress provided in an embodiment of this disclosure;

[0051] Figure 5 This is an example schematic diagram of dissipation energy density and cumulative acoustic emission energy provided in an embodiment of this disclosure;

[0052] Figure 6 This is an example schematic diagram of an elastic energy provided in an embodiment of this disclosure;

[0053] Figure 7 This is a block diagram illustrating a multi-parameter dynamic evaluation device for the instability of deep coal and rock masses under microseismic conditions, according to an exemplary embodiment.

[0054] Figure 8 This is an example schematic diagram of an electronic device according to an exemplary embodiment. Detailed Implementation

[0055] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0056] This disclosure provides a method, apparatus, electronic device, and storage medium for evaluating coal impact tendency based on acoustic emission energy. In some embodiments, the terms "evaluation method for coal impact tendency based on acoustic emission energy" and "information processing method" and "communication method" can be used interchangeably; the terms "apparatus for evaluating coal impact tendency based on acoustic emission energy" and "information processing apparatus" and "communication apparatus" can be used interchangeably; and the terms "information processing system" and "communication system" can be used interchangeably.

[0057] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0058] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0059] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0060] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0061] In the embodiments disclosed herein, "multiple" refers to two or more.

[0062] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0063] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0064] In some embodiments, "terminal" or "terminal device" may be referred to as "user equipment (UE)," "user terminal," "mobile station (MS)," "mobile terminal (MT)," "subscriber station," "mobile unit," "subscriber unit," "wireless unit," "remote unit," "mobile device," "wireless device," "wireless communication device," "remote device," "mobile subscriber station," "access terminal," "mobile terminal," "wireless terminal," "remote terminal," "handset," "user agent," "mobile client," "client," etc.

[0065] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0066] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0067] According to some embodiments, the impact tendency evaluation process can test indicators such as uniaxial compressive strength, dynamic failure time, elastic energy index, and impact energy index, requiring complex testing on a large number of test samples. Although some embodiments provide simplified testing methods for impact tendency, such as simplifying indicators like softening modulus-elastic modulus ratio, yield strength, and brittleness index, these methods are often overly simplistic, reducing the reliability of the evaluation results. The impact tendency evaluation mainly focuses on the degree of energy accumulation and release rate of the coal sample. During loading, the coal sample accumulates energy while dissipating some energy. When fractures develop and penetrate, energy dissipation increases, and energy is rapidly released outward during instability and failure. Energy accumulation is mainly caused by elastic deformation in the pre-peak stage. However, coal and rock are elasto-plastic materials; while accumulating energy, they also dissipate plastic deformation properties. The elastic energy index is the ratio of accumulated elastic energy to dissipated plastic properties in the pre-peak stage. Therefore, the technical solutions of some embodiments must obtain the impact energy index by repeatedly loading and unloading tests to test the ratio of elastic energy to plastic properties when the peak load reaches approximately 80% of the peak strength. However, this method requires accurate prediction of peak intensity, has a low failure rate, requires a large number of repeated experiments, and the results are subject to chance and subjectivity.

[0068] Figure 1 This is a flowchart of the first method for evaluating coal impact tendency based on acoustic emission energy provided in this disclosure, as shown in the embodiments. Figure 1 As shown, this method for evaluating coal impact tendency based on acoustic emission energy can be used in coal impact tendency scenarios, and includes the following steps:

[0069] In step S11, when the first coal sample is subjected to a preset loading force, the elastic energy index of the first coal sample is obtained based on acoustic emission characteristics and stress-strain characteristics.

[0070] In some embodiments, the executing entity of this disclosure may be, for example, an electronic device. This electronic device does not specifically refer to a particular fixed electronic device. For example, when the device identifier changes, the electronic device may also change accordingly. For example, when the structure of the electronic device changes, the electronic device may also change accordingly. Furthermore, the executing entity of this disclosure may also be a server, which may be a single server or a server cluster; this disclosure does not limit this.

[0071] In some embodiments, the first coal sample may be, for example, the coal sample whose shock susceptibility is to be evaluated. The first coal sample does not specifically refer to a particular fixed coal sample. For example, the first coal sample may change when its shape changes. For example, the first coal sample may change when its composition changes. For example, the first coal sample may change when its coal sample identification changes.

[0072] According to some embodiments, a preset force can be used, for example, to indicate the pressure acting on a first coal sample. This preset force is not specifically a fixed force. For example, the preset force can change accordingly when its value changes. Similarly, the preset force can change accordingly when its direction changes.

[0073] According to some embodiments, the phenomenon of transient elastic waves generated by the rapid release of energy from a local source in a material is called acoustic emission. The acoustic emission characteristics in the embodiments of this disclosure may, for example, be the corresponding characteristics generated by a first coal sample when it rapidly releases energy. These acoustic emission characteristics are not specifically defined as any fixed characteristic. For example, when the specific features included in the acoustic emission characteristics change, the acoustic emission characteristics may also change accordingly.

[0074] In some embodiments, stress and strain can be a collective term for stress and strain, where stress can be, for example, "the additional internal force per unit area." When an object deforms under stress, the degree of deformation is generally not the same at different points within the object. The mechanical quantity used to describe the degree of deformation at a point is the strain at that point.

[0075] According to some embodiments, the stress-strain characteristics may be, for example, characteristics associated with the first coal sample, and the stress characteristics may be, for example, the additional internal forces borne per unit area of ​​the first coal sample.

[0076] According to some embodiments, the Weighted Elastic Energy (WET) index can be, for example, a key indicator for assessing the impact susceptibility of a coal sample, such as the ratio of elastic energy stored to dissipated energy in a first coal sample during loading. This elastic energy index is not specifically a fixed index. For example, the elastic energy index can change accordingly when the elastic energy or dissipated energy changes.

[0077] In some embodiments, when the first coal sample is subjected to a preset applied force, the elastic energy index of the first coal sample is obtained based on acoustic emission characteristics and stress-strain characteristics.

[0078] In step S12, the impact energy index of the first coal sample is obtained based on the stress-strain characteristics;

[0079] According to some embodiments, the impact energy index can be, for example, the ratio of the modulus of elastic energy to the modulus of dissipated energy. This impact energy index is not specifically a fixed index. For example, the impact energy index can change accordingly when the strain-stress characteristics change. For example, the impact energy index can also change accordingly when the obtained modulus of elastic energy or the modulus of dissipated energy changes.

[0080] In some embodiments, the impact energy index of the first coal sample can be obtained based on the stress-strain characteristics.

[0081] In step S13, the uniaxial compressive strength and failure time of the first coal sample are obtained based on the stress-time relationship curve of the coal sample.

[0082] In some embodiments, the stress-time relationship curve can be a pre-obtained curve representing the relationship between stress and time.

[0083] In some embodiments, uniaxial compressive strength can be used, for example, to indicate how much pressure or force a first coal sample can withstand.

[0084] According to some embodiments, the failure time may be, for example, the time from the application of a preset force to the failure of the first coal sample. This failure time is not specifically a fixed duration. For example, the failure time may also change accordingly when the preset force changes.

[0085] In some embodiments, the uniaxial compressive strength and failure time of the first coal sample are obtained based on the stress-time relationship curve of the coal sample. Alternatively, the uniaxial compressive strength and failure time of the first coal sample can be obtained based on the stress-time relationship curve of the coal sample.

[0086] In some embodiments, the uniaxial compressive strength and failure time of a first coal sample can be obtained from the stress-time relationship curve of the coal sample.

[0087] In step S14, the impact tendency evaluation method is adopted to evaluate the impact tendency of the first coal sample based on the elastic energy index, impact energy index, uniaxial compressive strength and failure time, so as to obtain the impact tendency of the first coal sample.

[0088] According to some embodiments, the impact tendency assessment method may be, for example, an assessment method corresponding to the first coal sample. This impact tendency assessment method may vary depending on changes in scenario information or changes in the coal sample information of the first coal sample. The impact tendency assessment method is not specifically defined by a fixed method. For example, when the weight information corresponding to the impact tendency assessment method changes, the impact tendency assessment method may also change accordingly. For example, when the method for determining the impact tendency assessment method changes, the impact tendency assessment method may also change accordingly.

[0089] According to some embodiments, the impact tendency can refer to, for example, the natural property of whether a coal and rock mass can experience rockburst. In the embodiments of this disclosure, the impact tendency can refer to, for example, the property of whether a first coal sample can experience rockburst. The impact tendency of the first coal sample does not specifically refer to a single fixed property. For example, when any one of the elastic energy index, impact energy index, uniaxial compressive strength, and failure time changes, the impact tendency of the first coal sample can also change accordingly.

[0090] In some embodiments, an impact tendency evaluation method is adopted, which evaluates the impact tendency of the first coal sample based on the elastic energy index, impact energy index, uniaxial compressive strength and failure time, and obtains the impact tendency of the first coal sample.

[0091] In some or related embodiments, the elastic energy index of the first coal sample is obtained based on acoustic emission characteristics and stress-strain characteristics when the first coal sample is subjected to a preset loading force; the impact energy index of the first coal sample is obtained based on the stress-strain characteristics; the uniaxial compressive strength and failure time of the first coal sample are obtained based on the stress-time relationship curve of the coal sample; and the impact tendency evaluation method is adopted to evaluate the impact tendency of the first coal sample based on the elastic energy index, impact energy index, uniaxial compressive strength, and failure time, thereby obtaining the impact tendency of the first coal sample. Therefore, characteristic information and evaluation parameters can be obtained in advance, and the impact tendency evaluation can be performed directly based on the corresponding evaluation parameters, without the need for repeated loading and unloading tests. This reduces the high failure rate of loading and unloading tests and the need for repeated tests, reduces the cumbersome steps of loading and unloading tests, improves the efficiency of coal sample impact tendency evaluation, and reduces the need for manual determination of impact tendency evaluation based on test results. This reduces the subjectivity and randomness of impact tendency evaluation and improves the accuracy and convenience of coal sample impact tendency evaluation.

[0092] Figure 2 This is a flowchart of the second method for evaluating coal impact tendency based on acoustic emission energy provided in this disclosure, as shown in the embodiments. Figure 2As shown, this method for evaluating coal impact tendency based on acoustic emission energy can be used in coal impact tendency evaluation scenarios, and includes the following steps:

[0093] In step S21, when the first coal sample is subjected to a preset loading force, the first input energy is obtained based on the stress-strain characteristics and pre-peak data of the first coal sample.

[0094] The relevant descriptions are as described above and will not be repeated here.

[0095] In some embodiments, the stress-strain characteristics may be, for example, characteristics obtained when a preset force is applied to a first coal sample. These stress-strain characteristics may be, for example, a stress-strain curve. Pre-peak data may be, for example, data acquired before the peak of the stress-strain curve. This pre-peak data does not specifically refer to a fixed value. For example, when the coal sample or the preset force changes, the pre-peak data may also change accordingly.

[0096] In some embodiments, the first input energy may be, for example, the energy input to the first coal sample during the application of a preset force, and this first input energy does not specifically refer to a fixed energy. For example, when the method of obtaining the first input energy changes, the first input energy may also change accordingly. The "first" in the first input energy is used to distinguish it from other input energies and does not specifically refer to a fixed energy.

[0097] In some embodiments, for example, when the first coal sample is subjected to a preset applied force, the first input energy can be obtained based on the stress-strain characteristics and pre-peak data of the first coal sample.

[0098] According to some embodiments, the method further includes:

[0099] Obtain the coal sample information corresponding to the first coal sample;

[0100] Based on the coal sample information, the loading information corresponding to the first coal sample is obtained. This loading information includes the force application method and the preset force. Therefore, loading information corresponding to this first coal sample can be obtained, improving the matching between the loading information and the coal sample, and increasing the accuracy of determining the impact tendency.

[0101] In some embodiments, the coal sample information may be information related to a first coal sample. This coal sample information may include, for example, coal sample size, coal sample material, coal sample density, and coal sample shape. For instance, the first coal sample may be pre-processed to obtain a first coal sample with a predetermined shape. This predetermined shape may be, for example, cylindrical. This disclosure does not limit this aspect.

[0102] In some embodiments, Figure 3This is a flowchart of the third method for evaluating coal impact tendency based on acoustic emission energy provided in this disclosure, as shown in the embodiments. Figure 3 As shown, for example, coal blocks can be collected and processed into standard cylindrical coal samples based on rock mechanics testing methods and procedures.

[0103] In step S22, the first dissipated energy of the first coal sample during the loading of the preset force is obtained based on the cumulative acoustic emission energy corresponding to the pre-peak stage and the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy.

[0104] The relevant descriptions can be as described above, and will not be repeated here.

[0105] In some embodiments, the cumulative acoustic emission energy corresponding to the pre-peak stage can be calculated by detecting the stress-strain curve of a first coal sample with acoustic emission characteristics. When the cumulative acoustic emission energy corresponding to the pre-peak stage is obtained, the first dissipated energy of the first coal sample during the loading of a preset force can be obtained based on the quantitative relationship between the cumulative acoustic emission energy corresponding to the pre-peak stage and the dissipated energy. For example, the first dissipated energy of the first coal sample during the loading of a preset force can be obtained based on the quantitative relationship between the cumulative acoustic emission energy corresponding to the pre-peak stage and the dissipated energy.

[0106] The first dissipated energy can be, for example, the energy dissipated by the first coal sample during the application of a preset force. This first dissipated energy does not specifically refer to a fixed energy level. For example, when the cumulative acoustic emission energy corresponding to the pre-peak stage changes, the first dissipated energy can also change accordingly. For example, when the quantitative relationship changes, the first dissipated energy can also change accordingly. The "first" in the first dissipated energy is used to distinguish it from other dissipated energies.

[0107] In step S23, the first elastic energy of the first coal sample during the loading of the preset force is obtained based on the first input energy and the first dissipated energy.

[0108] The relevant descriptions can be as described above, and will not be repeated here.

[0109] In some embodiments, upon obtaining the first input energy and the first dissipated energy, the first elastic energy of the first coal sample during the loading of a preset force can be obtained based on the first input energy and the first dissipated energy. For example, the difference between the first input energy and the first dissipated energy can be used as the first elastic energy of the first coal sample during the loading of a preset force.

[0110] According to some embodiments, the first elastic energy can be used, for example, to indicate the elastic energy accumulated in a first coal sample during the application of a preset force. This elastic energy can also be referred to as elastic energy. The "first" in the first elastic energy is used to distinguish it from other elastic energies.

[0111] According to some embodiments, such as Figure 3 As shown, for example, by monitoring the acoustic emission of multiple coal samples during loading and unloading tests, the dissipated energy and cumulative acoustic emission energy of the coal samples during loading and unloading can be obtained, and a quantitative mathematical model of the dissipated energy and cumulative acoustic emission energy can be fitted, i.e., a quantitative relationship.

[0112] According to some embodiments, the method further includes:

[0113] Under uniaxial loading and unloading force conditions, the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy is obtained. Therefore, by obtaining quantitative relationships using data from uniaxial loading and unloading force conditions, the accuracy of obtaining quantitative relationships, the accuracy of obtaining elastic energy during loading, and the accuracy of obtaining impact tendency can be improved.

[0114] According to some embodiments, the second coal sample may be, for example, a historical coal sample, i.e., a coal sample used to obtain a quantitative relationship between the cumulative acoustic emission energy and the dissipated energy. The number of such second coal samples may be, for example, multiple. For instance, at least one second coal sample may be subjected to cyclic loading and unloading force operations.

[0115] According to some embodiments, when at least one second coal sample is under uniaxial loading and unloading force conditions, the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy is obtained, including:

[0116] When at least one second coal sample is under uniaxial loading and unloading force conditions, the axial stress set and strain set corresponding to any second coal sample are obtained according to the second input energy.

[0117] Based on the axial stress set, strain set, and unloading stress-strain curve of any second coal sample, obtain the second elastic energy corresponding to any second coal sample.

[0118] Obtain the third input energy corresponding to any second coal sample under uniaxial loading force;

[0119] Based on the third input energy and the second elastic energy, obtain the second dissipated energy of any second coal sample under uniaxial loading force.

[0120] Based on the third input energy and the second dissipated energy, a quantitative relationship between the cumulative acoustic emission energy and the dissipated energy is obtained.

[0121] In some embodiments, the axial stress set may include stresses corresponding to multiple cyclic operations. This axial stress set may be a collection of at least one axial stress. The axial stress set does not specifically refer to a fixed set. For example, when a certain axial stress in the axial stress set changes, the axial stress set may also change accordingly. Examples of strain and stress can be illustrated as follows: Figure 4 As shown. Among them, elastic energy can also be called elastic accumulated energy, and dissipated energy can also be called plastic dissipated energy.

[0122] According to some embodiments, the second input energy may be, for example, the energy input during the loading and unloading of the second coal sample. The "second" in this second input energy is used to distinguish it from the other input energies.

[0123] In some embodiments, strain may correspond to stress, for example. A strain set may be a collection of at least one strain. This strain set is not specifically a fixed set. For example, the strain set may change when the amount of data corresponding to it changes. For example, the strain set may change when a strain within it changes.

[0124] In some embodiments, the third input energy may be, for example, the energy input to the second coal sample during the application of the applied force.

[0125] In some embodiments, the evolution of coal and rock damage is accompanied by the accumulation and dissipation of energy. Under cyclic loading and unloading, the coal sample undergoes four stages: initial compaction, stable deformation, damage deterioration, and failure and instability. The input of external energy and the accumulation, dissipation, and release of coal sample energy are present throughout the entire process. The input energy, elastic energy, dissipated energy, and thermal energy of the loaded coal and rock are mutually transformed. The calculation of input energy, elastic energy, and irreversible dissipated energy is crucial for evaluating the impact tendency.

[0126] This embodiment of the invention can be carried out in a pre-set closed system, which may also be called a loading and unloading test system. The total energy U input to the coal sample from the outside is generated by the work done by axial stress. Under the i-th cyclic load, the input energy will be divided into two parts: one part causes the coal and rock to undergo elastic deformation and be converted into elastic energy, and the other part causes the coal and rock to undergo plastic deformation or crack sliding and be consumed. The stored elastic energy will be released during the unloading process along with the recovery of deformation.

[0127] According to some embodiments, the total input energy U under uniaxial loading and unloading conditions is generated by the work done by the axial stress during the loading process, specifically as shown in formula (1).

[0128]

[0129] In the formula, σ 1j σ is the j-th axial stress recorded in the i-th cycle of loading. 1j-1 For the (j-1)th axial stress in this cyclic loading process, ε 1j ε 1j-1 , where represents the strain corresponding to the stresses mentioned above, and n represents the number of cyclic loads applied.

[0130] In some embodiments, during the loading process, elastic energy, i.e., elastic energy U, is accumulated. e and dissipated energy U d While it cannot be directly calculated, the elastic energy accumulated during the same loading cycle is released by doing negative work on the loading plate during unloading. Therefore, the elastic energy during loading can be calculated by the work done during unloading; for example, the accurate elastic energy U can be obtained by integrating the unloading stress-strain curve. e For example, it can be shown in formula (2).

[0131]

[0132] In the formula, σ 1uj σ is the j-th axial stress recorded in the i-th unloading cycle. 1uj-1 ε represents the (j-1)th axial stress recorded during the i-th unloading cycle. 1uj ε 1uj-1 These represent the strains corresponding to the stresses mentioned above.

[0133] In some embodiments, energy U is dissipated during loading. d The input energy U1 and the accumulated elastic energy U corresponding to the loading process e The difference can be specifically illustrated as shown in formula (3).

[0134]

[0135] According to some embodiments, since elastic deformation includes both linear elasticity and nonlinear elasticity, the simplified calculation method only considers the elastic energy generated by linear elastic deformation and ignores the elastic deformation caused by nonlinear elastic deformation. This simplified calculation method overestimates the plastic energy of the loaded coal sample and underestimates the elastic energy, which will underestimate the possibility of dynamic failure of the coal and rock itself, bringing risks and hidden dangers to the safe and efficient mining of coal seams. In the embodiments of this disclosure, with the loading of peak stress, the plastic dissipation energy and the cumulative acoustic emission energy of the loaded and unloaded coal and rock increase significantly. In order to accurately evaluate the energy evolution of the loaded coal and rock, the relationship between the plasticity and acoustic emission energy of the H mine coal sample and the M mine coal sample was established, specifically as shown in formula (4). Among them, the H mine coal sample and the M mine coal sample are any two coal samples from at least one second coal sample.

[0136]

[0137] In the formula, U AE For the accumulated energy of acoustic emission, U d This is for dissipating energy. The specific values ​​can be replaced with other values ​​and are not limited to a single fixed value. Figure 5 This diagram illustrates an example of dissipated energy density and cumulative acoustic emission (AE) energy. At least one second coal sample may include, for example, coal sample M-1, coal sample M-3, and coal sample H-4.

[0138] According to some embodiments, such as Figure 3 As shown, for example, a uniaxial compression test of a coal sample can be carried out to monitor the acoustic emission characteristics, obtain the cumulative acoustic emission energy of the coal sample in the pre-peak stage, and obtain the dissipated energy of the coal sample during loading based on a quantitative mathematical model of dissipated energy and cumulative acoustic emission energy.

[0139] According to some embodiments, when assessing the impact tendency of a first coal sample, for example, the cumulative acoustic emission energy and the input energy before the peak can be calculated by monitoring the stress-strain curve of the loaded coal sample with acoustic emission characteristics. Based on the quantitative relationship between acoustic emission characteristics and dissipated energy, the magnitude of the dissipated energy of the loaded coal sample can be obtained, and the input energy U2 and dissipated energy U can be calculated. d The difference is the elastic accumulation energy U. e Specific examples include, for instance, such as Figure 6 As shown.

[0140] Specifically, the cumulative acoustic emission energy during the uniaxial loading process and formula (4) can be obtained, and the first dissipated energy U during the loading of the preset force can be obtained. d1 The first elastic energy U during the loading process can be obtained based on formula (5) by inputting the relationship between energy, dissipated energy, and elastic energy. e1 .

[0141]

[0142] In step S24, the elastic energy index of the first coal sample is obtained based on the first elastic energy and the first dissipated energy.

[0143] The relevant descriptions can be as described above, and will not be repeated here.

[0144] According to some embodiments, the specific formula for calculating the first elastic energy index can be, for example, as shown in formula (6):

[0145] W ET =U e / U d1 (6)

[0146] Among them, W ETIt is the first elasticity index.

[0147] According to some embodiments, such as Figure 3 As shown, for example, the input energy can be obtained by integrating the pre-peak curve based on the stress-strain characteristic curve of the coal sample. The difference between the input energy and the dissipated energy is the elastic energy. The ratio of elastic energy to dissipated energy can be calculated to obtain the elastic energy index.

[0148] In step S25, the impact energy index of the first coal sample is obtained based on the stress-strain characteristics;

[0149] The relevant descriptions can be as described above, and will not be repeated here.

[0150] Based on the stress-strain characteristics, the impact energy index of the first coal sample is obtained, including:

[0151] Based on the stress-strain characteristics, the elastic modulus of the first coal sample during the loading of a preset force is obtained, wherein the elastic modulus is used to indicate the modulus of the first input energy of the first coal sample during the loading of the preset force.

[0152] Obtain the softening modulus corresponding to the first coal sample, wherein the softening modulus is used to indicate the modulus of the first dissipated energy of the first coal sample during the loading of a preset force;

[0153] The ratio of elastic modulus to softening modulus is used as the impact energy index of the first coal sample. Therefore, the accuracy of obtaining the impact energy index can be improved, as can the accuracy of determining the impact tendency of the coal sample.

[0154] In step S26, the uniaxial compressive strength and failure time of the first coal sample are obtained based on the stress-time relationship curve of the coal sample.

[0155] The relevant descriptions can be as described above, and will not be repeated here.

[0156] In step S27, the impact tendency evaluation method is adopted to evaluate the impact tendency of the first coal sample based on the elastic energy index, impact energy index, uniaxial compressive strength and failure time, so as to obtain the impact tendency of the first coal sample.

[0157] The relevant descriptions can be as described above, and will not be repeated here.

[0158] According to some embodiments, the method further includes:

[0159] Obtain environmental information corresponding to the first coal sample;

[0160] Environmental information was used to correct the impact tendency of the first coal sample, resulting in a corrected impact tendency. Therefore, environmental information can be used to correct the impact tendency, improving the accuracy of impact tendency acquisition.

[0161] Environmental information may include, for example, temperature and the content of various gases.

[0162] According to some embodiments, such as Figure 3 As shown, for example, the uniaxial compressive strength, failure time, elastic modulus, softening modulus, and post-peak energy loss can be obtained from the stress-time relationship curve of the coal sample. The impact energy index can be calculated, and the impact tendency of the coal sample can be evaluated based on the coal sample impact tendency evaluation method, as well as the uniaxial compressive strength, failure time, elastic energy index, and impact energy index.

[0163] In one or related embodiments, when the first coal sample is subjected to a preset loading force, the first input energy is obtained based on the stress-strain characteristics and pre-peak data of the first coal sample; the first dissipated energy of the first coal sample during the loading of the preset loading force is obtained based on the cumulative acoustic emission energy corresponding to the pre-peak stage and the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy; the first elastic energy of the first coal sample during the loading of the preset loading force is obtained based on the first input energy and the first dissipated energy; and the elastic energy index of the first coal sample is obtained based on the first elastic energy and the first dissipated energy. Therefore, the elastic energy index can be determined based on the quantitative relationship without repeated experiments, which can reduce the possibility of inaccurate elastic energy index acquisition due to experimental randomness and subjectivity, improve the accuracy of elastic energy index acquisition, and improve the accuracy and convenience of coal sample impact tendency assessment.

[0164] A block diagram illustrating an evaluation device for coal impact tendency based on acoustic emission energy, according to an exemplary embodiment. (Refer to...) Figure 7 The device 700 includes:

[0165] The index acquisition unit 701 is used to acquire the elastic energy index of the first coal sample based on acoustic emission characteristics and stress-strain characteristics when the first coal sample is subjected to a preset loading force.

[0166] The index acquisition unit 701 is also used to acquire the impact energy index of the first coal sample based on the stress-strain characteristics.

[0167] The data acquisition unit 702 is used to acquire the uniaxial compressive strength and failure time of the first coal sample based on the stress-time relationship curve of the coal sample.

[0168] The tendency evaluation unit 703 is used to evaluate the impact tendency of the first coal sample by using the impact tendency evaluation method based on the elastic energy index, impact energy index, uniaxial compressive strength and failure time, and obtain the impact tendency of the first coal sample.

[0169] According to some embodiments, the index acquisition unit 701 is used to acquire the elastic energy index of the first coal sample based on the cumulative acoustic emission energy and stress-strain characteristics when the first coal sample is subjected to a preset loading force. Specifically, it is used for:

[0170] When the first coal sample is subjected to a preset loading force, the first input energy is obtained based on the stress-strain characteristics and pre-peak data of the first coal sample.

[0171] Based on the cumulative acoustic emission energy corresponding to the pre-peak stage and the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy, the first dissipated energy of the first coal sample during the loading of the preset force is obtained.

[0172] Based on the first input energy and the first dissipated energy, obtain the first elastic energy of the first coal sample during the loading of the preset force;

[0173] The elastic energy index of the first coal sample is obtained based on the first elastic energy and the first dissipated energy.

[0174] According to some embodiments, the index acquisition unit 701 is also specifically used for:

[0175] Under the condition that at least one second coal sample is subjected to uniaxial loading and unloading forces, obtain the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy.

[0176] According to some embodiments, the index acquisition unit 701 is used to acquire a quantitative relationship between the cumulative acoustic emission energy and the dissipated energy when at least one second coal sample is under uniaxial loading and unloading force conditions. Specifically, it is used for:

[0177] When at least one second coal sample is under uniaxial loading and unloading force conditions, the axial stress set and strain set corresponding to any second coal sample are obtained according to the second input energy.

[0178] Based on the axial stress set, strain set, and unloading stress-strain curve of any second coal sample, obtain the second elastic energy corresponding to any second coal sample.

[0179] Obtain the third input energy corresponding to any second coal sample under uniaxial loading force;

[0180] Based on the third input energy and the second elastic energy, obtain the second dissipated energy of any second coal sample under uniaxial loading force.

[0181] Based on the third input energy and the second dissipated energy, a quantitative relationship between the cumulative acoustic emission energy and the dissipated energy is obtained.

[0182] According to some embodiments, when the index acquisition unit 701 acquires the impact energy index of the first coal sample based on stress-strain characteristics, it is specifically used for:

[0183] Based on the stress-strain characteristics, the elastic modulus of the first coal sample during the loading of a preset force is obtained, wherein the elastic modulus is used to indicate the modulus of the first input energy of the first coal sample during the loading of the preset force.

[0184] Obtain the softening modulus corresponding to the first coal sample, wherein the softening modulus is used to indicate the modulus of the first dissipated energy of the first coal sample during the loading of a preset force;

[0185] The ratio of elastic modulus to softening modulus was used as the impact energy index of the first coal sample.

[0186] According to some embodiments, the index acquisition unit 701 is further configured to:

[0187] Obtain environmental information corresponding to the first coal sample;

[0188] The impact tendency of the first coal sample was corrected using environmental information to obtain the corrected impact tendency.

[0189] According to some embodiments, the index acquisition unit 701 is further configured to:

[0190] Obtain the coal sample information corresponding to the first coal sample;

[0191] Based on the coal sample information, obtain the loading information corresponding to the first coal sample, including the force loading method and the preset force.

[0192] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0193] In some or related embodiments, an index acquisition unit is used to acquire the elastic energy index of the first coal sample based on acoustic emission characteristics and stress-strain characteristics when the first coal sample is subjected to a preset loading force. The index acquisition unit is also used to acquire the impact energy index of the first coal sample based on the stress-strain characteristics. A data acquisition unit is used to acquire the uniaxial compressive strength and failure time of the first coal sample based on the stress-time relationship curve of the coal sample. A tendency evaluation unit is used to evaluate the impact tendency of the first coal sample using an impact tendency evaluation method, based on the elastic energy index, impact energy index, uniaxial compressive strength, and failure time, to acquire the impact tendency of the first coal sample. Therefore, characteristic information and evaluation parameters can be acquired in advance, and impact tendency evaluation can be performed directly based on the corresponding evaluation parameters, eliminating the need for repeated loading and unloading tests. This reduces the high failure rate of loading and unloading tests, reduces the cumbersome steps of loading and unloading tests, improves the efficiency of coal sample impact tendency evaluation, and reduces the need for manual determination of impact tendency evaluation based on test results. This reduces the subjectivity and randomness of impact tendency evaluation, and improves the accuracy and convenience of coal sample impact tendency evaluation.

[0194] Figure 8 A schematic block diagram of an example electronic device 800 that can be used to implement embodiments of the present disclosure is shown. The electronic device 800 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0195] like Figure 8 As shown, the electronic device 800 includes a computing unit 801, which can perform various appropriate actions and processes based on a computer program stored in a read-only memory (ROM) 802 or a computer program loaded from a storage unit 808 into a random access memory (RAM) 803. The RAM 803 may also store various programs and data required for the operation of the electronic device 800. The computing unit 801, ROM 802, and RAM 803 are interconnected via a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0196] Multiple components in electronic device 800 are connected to I / O interface 805, including: input unit 806, such as keyboard, mouse, etc.; output unit 807, such as various types of displays, speakers, etc.; storage unit 808, such as disk, optical disk, etc.; and communication unit 809, such as network card, modem, wireless transceiver, etc. Communication unit 809 allows electronic device 800 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0197] The computing unit 801 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 801 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 801 performs the various methods and processes described above. For example, in some embodiments, the above methods can be implemented as a computer software program tangibly contained in a machine-readable medium, such as storage unit 808. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 800 via ROM 802 and / or communication unit 809. When the computer program is loaded into RAM 803 and executed by the computing unit 801, one or more steps of the methods described above can be performed. Alternatively, in other embodiments, the computing unit 801 can be configured to perform the above methods by any other suitable means (e.g., by means of firmware).

[0198] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0199] The program code used to implement the methods of this disclosure may be written in any combination of one or more programming languages. This program code may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor or controller, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0200] In the context of this disclosure, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0201] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0202] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), the Internet, and blockchain networks.

[0203] Computer systems can include clients and servers. Clients and servers are generally geographically separated and typically interact via communication networks. The client-server relationship is established by computer programs running on the respective computers and having a client-server relationship with each other. A server can be a cloud server, also known as a cloud computing server or cloud host, a hosting product within the cloud computing service system that addresses the management difficulties and weak business scalability inherent in traditional physical hosts and VPS (Virtual Private Server) services. Servers can also be servers for distributed systems or servers integrated with blockchain technology.

[0204] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0205] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A method for evaluating coal impact tendency based on acoustic emission energy, characterized in that, include: When the first coal sample is subjected to a preset loading force, the elastic energy index of the first coal sample is obtained based on acoustic emission characteristics and stress-strain characteristics. Based on the stress-strain characteristics, the impact energy index of the first coal sample is obtained; Based on the stress-time relationship curve of the coal sample, the uniaxial compressive strength and failure time of the first coal sample are obtained; An impact tendency evaluation method is adopted to evaluate the impact tendency of the first coal sample based on the elastic energy index, impact energy index, uniaxial compressive strength and failure time, so as to obtain the impact tendency of the first coal sample. Wherein, obtaining the elastic energy index of the first coal sample based on the cumulative acoustic emission energy and stress-strain characteristics when the first coal sample is subjected to a preset loading force includes: When the first coal sample is subjected to a preset loading force, the first input energy is obtained based on the stress-strain characteristics and pre-peak data of the first coal sample. Based on the cumulative acoustic emission energy corresponding to the pre-peak stage and the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy, the first dissipated energy of the first coal sample during the loading of the preset force is obtained. Based on the first input energy and the first dissipated energy, the first elastic energy of the first coal sample during the loading of a preset force is obtained; Based on the first elastic energy and the first dissipated energy, obtain the elastic energy index of the first coal sample; The method further includes: Under the condition that at least one second coal sample is subjected to uniaxial loading and unloading force, obtain the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy; Wherein, obtaining the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy under uniaxial loading and unloading force conditions at least one second coal sample includes: When at least one second coal sample is under uniaxial loading and unloading force conditions, the axial stress set and strain set corresponding to any second coal sample are obtained according to the second input energy. Based on the axial stress set, the strain set, and the unloading stress-strain curve of any second coal sample, the second elastic energy corresponding to any second coal sample is obtained. Obtain the third input energy corresponding to any second coal sample under uniaxial loading force; Based on the third input energy and the second elastic energy, obtain the second dissipated energy of any second coal sample under uniaxial loading force. Based on the third input energy and the second dissipated energy, a quantitative relationship between the cumulative acoustic emission energy and the dissipated energy is obtained.

2. The method according to claim 1, characterized in that, The step of obtaining the impact energy index of the first coal sample based on the stress-strain characteristics includes: Based on the stress-strain characteristics, the elastic modulus of the first coal sample during the loading of a preset force is obtained, wherein the elastic modulus is used to indicate the modulus of the first input energy of the first coal sample during the loading of the preset force. Obtain the softening modulus corresponding to the first coal sample, wherein the softening modulus is used to indicate the modulus of the first dissipated energy of the first coal sample during the loading of a preset force; The ratio of the elastic modulus to the softening modulus is used as the impact energy index of the first coal sample.

3. The method according to claim 1, characterized in that, The method further includes: Obtain the environmental information corresponding to the first coal sample; The environmental information is used to correct the impact tendency of the first coal sample, and the corrected impact tendency is obtained.

4. The method according to claim 1, characterized in that, The method further includes: Obtain the coal sample information corresponding to the first coal sample; Based on the coal sample information, the loading information corresponding to the first coal sample is obtained, wherein the loading information includes the force loading method and the preset force.

5. A device for evaluating coal impact tendency based on acoustic emission energy, characterized in that, include: The index acquisition unit is used to acquire the elastic energy index of the first coal sample based on acoustic emission characteristics and stress-strain characteristics when the first coal sample is subjected to a preset loading force. The index acquisition unit is also used to acquire the impact energy index of the first coal sample based on the stress-strain characteristics. The data acquisition unit is used to obtain the uniaxial compressive strength and failure time of the first coal sample based on the stress-time relationship curve of the coal sample. The tendency evaluation unit is used to evaluate the impact tendency of the first coal sample by adopting the impact tendency evaluation method based on the elastic energy index, impact energy index, uniaxial compressive strength and failure time, and obtain the impact tendency of the first coal sample. The index acquisition unit, specifically used to acquire the elastic energy index of the first coal sample based on the cumulative acoustic emission energy and stress-strain characteristics when the first coal sample is subjected to a preset loading force, is used for: When the first coal sample is subjected to a preset loading force, the first input energy is obtained based on the stress-strain characteristics and pre-peak data of the first coal sample. Based on the cumulative acoustic emission energy corresponding to the pre-peak stage and the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy, the first dissipated energy of the first coal sample during the loading of the preset force is obtained. Based on the first input energy and the first dissipated energy, the first elastic energy of the first coal sample during the loading of a preset force is obtained; Based on the first elastic energy and the first dissipated energy, obtain the elastic energy index of the first coal sample; The index acquisition unit is further specifically used for: Under the condition that at least one second coal sample is subjected to uniaxial loading and unloading force, obtain the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy; The index acquisition unit, when acquiring the quantitative relationship between the cumulative acoustic emission energy and the dissipated energy under uniaxial loading and unloading force conditions for at least one second coal sample, is specifically used for: When at least one second coal sample is under uniaxial loading and unloading force conditions, the axial stress set and strain set corresponding to any second coal sample are obtained according to the second input energy. Based on the axial stress set, the strain set, and the unloading stress-strain curve of any second coal sample, the second elastic energy corresponding to any second coal sample is obtained. Obtain the third input energy corresponding to any second coal sample under uniaxial loading force; Based on the third input energy and the second elastic energy, obtain the second dissipated energy of any second coal sample under uniaxial loading force. Based on the third input energy and the second dissipated energy, a quantitative relationship between the cumulative acoustic emission energy and the dissipated energy is obtained.

6. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the coal impact tendency evaluation method based on acoustic emission energy as described in any one of claims 1 to 4.

7. A storage medium storing instructions, characterized in that, When the instruction is executed on an electronic device, the electronic device performs the evaluation method for coal impact tendency based on acoustic emission energy as described in any one of claims 1 to 4.

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