Coal mine stope thick and hard roof ground vertical well fracturing energy release modification mine earthquake prevention analysis method

Abstract

The invention provides a coal mine stope thick and hard roof ground vertical well fracturing energy release modification mine earthquake prevention and control analysis method. The method comprises the steps that a stope overlying thick and hard roof structure and energy transfer engineering structure model without ground vertical well fracturing and a stope overlying thick and hard roof structure and energy transfer engineering structure model after ground vertical well fracturing are established; based on the model, obtaining the total energy transmitted to the ground surface when the energy released when the thick and hard roof which is not subjected to ground vertical well fracturing and is subjected to ground vertical well fracturing is broken, and based on the obtained total energy, analyzing to obtain an analysis result of the ground vertical well fracturing energy release modification mine earthquake prevention and control of the thick and hard roof; the principle of mine earthquake prevention and control through ground vertical well fracturing energy release modification of the overlying thick and hard roof of the stope is clarified, so that mine earthquake prevention and control of ground vertical well fracturing pressure relief engineering can be better implemented.

Description

Technical Field

[0001] The present application relates to the field of coal mine safety technology, and in particular to an analysis method for preventing and controlling mine earthquakes by fracturing energy release modification of a vertical well on a thick hard roof in a coal mine. Background Art

[0002] When there is a thick hard roof overlying a coal mining area, it is not easy to collapse in time as the working face is mined, forming stress concentration and energy accumulation in the thick hard rock layer. When the overhang span of the thick hard roof reaches its limit breaking step, the roof breaks and releases energy instantly, generating strong vibrations, which are prone to mine tremors, inducing impact ground pressure, causing casualties, equipment damage, and threatening the safety risks of coal mine production. At the same time, mine tremors may cause the working face to stop production and rectify, affecting the normal production of the working face. Reducing the energy released by the breaking of the thick hard roof is the main means to prevent and control thick hard roof type mine tremors.

[0003] To address the thick and hard roof type mine tremors, surface vertical well fracturing and pressure unloading projects have been carried out to prevent and control mine tremors, and some results have been achieved. However, there is a lack of in-depth understanding of the principles of surface vertical well fracturing and pressure unloading to prevent and control mine tremors, which limits the effectiveness of mine tremor prevention and control.

[0004] Therefore, it is necessary to provide a method that can explain the principle of energy release modification of ground vertical well fracturing in thick hard roof overlying the mining area to prevent and control mine tremors, which can provide technical guidance for ground vertical well fracturing in thick hard roof to prevent and control mine tremors, so as to improve the effect of ground vertical well fracturing in thick hard roof to prevent and control mine tremors. Summary of the invention

[0005] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0006] To this end, the first purpose of this application is to propose an analysis method for preventing and controlling mine tremors by fracturing energy release and modification of ground vertical wells with thick hard roof in coal mines, and to explain the principle of preventing and controlling mine tremors by fracturing energy release and modification of ground vertical wells with thick hard roof overlying the mine, so as to better implement ground vertical well fracturing and pressure relief projects to prevent and control mine tremors.

[0007] The second purpose of the present application is to provide a mine earthquake analysis device for modified fracturing energy release of vertical wells on the thick hard roof of a coal mine.

[0008] The third objective of the present application is to provide an electronic device.

[0009] A fourth objective of the present application is to provide a computer-readable storage medium.

[0010] A fifth object of the present application is to provide a computer program product.

[0011] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a method for analyzing the energy release of fracturing and modification for preventing and controlling mine earthquakes in a vertical well on a thick hard roof of a coal mine, comprising:

[0012] Establishing a first model and a second model, wherein the first model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field before surface vertical well fracturing is implemented, and the second model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field after surface vertical well fracturing is implemented;

[0013] Based on the first model, a first total energy released and transmitted to the ground surface when a low-position thick hard roof plate is periodically broken and a high-position thick hard roof plate is initially broken is obtained without implementing surface vertical well fracturing, and a second total energy released and transmitted to the ground surface when each thick hard roof plate is periodically broken without implementing surface vertical well fracturing is obtained;

[0014] Based on the second model, a third total energy is obtained when the low-position thick hard roof plate is periodically broken and the high-position thick hard roof plate is initially broken during surface vertical well fracturing, and a fourth total energy is obtained when the thick hard roof plates are periodically broken during surface vertical well fracturing and are released and transmitted to the surface;

[0015] Based on the first total energy, the second total energy, the third total energy and the fourth total energy, the analysis results of fracturing energy release modification for preventing and controlling mine earthquakes in vertical wells on the thick hard roof are obtained.

[0016] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a coal mine field thick hard roof ground vertical well fracturing energy release modified mine earthquake analysis device, comprising:

[0017] A model building module, used to establish a first model and a second model, wherein the first model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field before surface vertical well fracturing is implemented, and the second model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field after surface vertical well fracturing is implemented;

[0018] an energy calculation module, for obtaining, based on the first model, a first total energy released and transmitted to the ground surface when a low-position thick hard roof plate is periodically broken and a high-position thick hard roof plate is initially broken without surface vertical well fracturing, and a second total energy released and transmitted to the ground surface when each thick hard roof plate is periodically broken without surface vertical well fracturing;

[0019] The energy calculation module is further used to obtain, based on the second model, a third total energy released and transmitted to the ground surface when the low-position thick hard roof plate is periodically broken and the high-position thick hard roof plate is initially broken during ground vertical well fracturing, and a fourth total energy released and transmitted to the ground surface when each thick hard roof plate is periodically broken during ground vertical well fracturing;

[0020] A result analysis module is used to obtain an analysis result of fracturing energy release modification for preventing and controlling mining earthquakes in a vertical well on a thick hard roof surface based on the first total energy, the second total energy, the third total energy and the fourth total energy.

[0021] To achieve the above-mentioned purpose, the third aspect embodiment of the present application proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method described in the first aspect.

[0022] To achieve the above-mentioned purpose, the fourth aspect of the present application proposes a computer-readable storage medium, in which computer-readable storage medium is stored computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the method described in the first aspect.

[0023] To achieve the above-mentioned purpose, the fifth aspect of the present application proposes a computer program product, including a computer program, which implements the method described in the first aspect when executed by a processor.

[0024] The present application provides a method, device, electronic equipment and storage medium for analyzing the energy release modification of thick hard roof in coal mine mining areas by ground vertical well fracturing to prevent and control mine earthquakes. By establishing a thick hard roof structure and energy transfer engineering structure model overlying the mining area where ground vertical well fracturing is not implemented and where ground vertical well fracturing is implemented, the energy transfer path of the thick hard roof breakage before and after ground vertical well fracturing pressure relief and the weakening effect of ground vertical well fracturing on the thick hard roof breakage energy are clarified, the energy transfer law of the thick hard roof breakage is analyzed, and the transferred energy is quantitatively characterized; by comparing and analyzing the first total energy released and transferred to the surface when the low-position thick hard roof is periodically broken and the high-position thick hard roof is first broken without ground vertical well fracturing, the first total energy released and transferred to the surface when the thick hard roof is periodically broken without ground vertical well fracturing is obtained. The second total energy, the third total energy of energy released and transmitted to the surface when the low-level thick hard roof is periodically broken and the high-level thick hard roof is first broken during ground vertical well fracturing, and the fourth total energy and calculation parameters of energy released and transmitted to the surface when each thick hard roof is periodically broken during ground vertical well fracturing. The weakening and modification effect of ground vertical well fracturing on the strength of thick hard roof, the weakening effect of energy released by thick hard roof breaking, and the attenuation effect of energy released by thick hard roof breaking during transmission in the artificial fracture network area of ​​fracturing are clarified. The principle of energy release modification for preventing and controlling mine earthquakes by ground vertical well fracturing of thick hard roof is explained, so as to better implement ground vertical well fracturing unloading project to prevent and control mine earthquakes. It has important theoretical and practical significance for improving the effect of preventing and controlling mine earthquakes by ground vertical well fracturing of thick hard roof and promoting the application of this technology.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0027] Figure 1 A schematic flow chart of a method for analyzing a vertical well fracturing energy release modification for preventing and controlling mine earthquakes in a coal mine with thick hard roof provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of a vertical well fracturing on a thick hard roof surface provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of the structure of the overburden and the accumulated energy before the initial breaking of the high-position thick hard roof without surface vertical well fracturing provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the overburden structure and energy transfer when a high-position thick hard roof is first broken without surface vertical well fracturing provided in an embodiment of the present application;

[0031] Figure 5 A schematic diagram of the structure of the overburden and the accumulated energy before the periodic fracture of the high-position thick hard roof without surface vertical well fracturing provided in the embodiment of the present application;

[0032] Figure 6 A schematic diagram of the structure of the overburden rock and energy transfer when the high-position thick hard roof is periodically broken without surface vertical well fracturing provided in an embodiment of the present application;

[0033] Figure 7 A schematic diagram of the overburden structure and energy transfer when the high-position thick hard roof is first broken after the surface vertical well fracturing is implemented in an embodiment of the present application;

[0034] Figure 8 A schematic diagram of the overburden structure and energy transfer during the periodic breaking of the high-position thick hard roof after the vertical well fracturing on the ground provided in the embodiment of the present application;

[0035] Fig. 9 A block diagram of a device for analyzing ground vertical well fracturing energy release and modified mine earthquakes in a coal mine with thick hard roof provided in an embodiment of the present application;

[0036] Fig.10 A block diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0038] The following describes the analysis method, device and equipment for preventing and controlling mine earthquakes by fracturing energy release modification of vertical wells on the ground of thick hard roof in a coal mine according to an embodiment of the present application with reference to the accompanying drawings.

[0039] Figure 1 A schematic flow chart of a method for analyzing the energy release modification and prevention of mine earthquakes by fracturing vertical wells on the thick hard roof of a coal mine provided in an embodiment of the present application.

[0040] It should be noted that the executor of the method for preventing and controlling mine earthquakes by fracturing energy release and modification of vertical wells with thick hard roof on the ground in coal mines in the embodiment of the present application is the device for preventing and controlling mine earthquakes by fracturing energy release and modification of vertical wells with thick hard roof on the ground in coal mines in the embodiment of the present application. The device for preventing and controlling mine earthquakes by fracturing energy release and modification of vertical wells with thick hard roof on the ground in coal mines can be configured in an electronic device so that the electronic device can execute the function of preventing and controlling mine earthquakes by fracturing energy release and modification of vertical wells with thick hard roof on the ground in coal mines.

[0041] like Figure 1 As shown, the analysis method for preventing and controlling mine earthquakes by fracturing energy release modification of vertical wells on the thick hard roof of a coal mine includes the following steps:

[0042] Step S101, establish a first model and a second model, the first model is a model of the thick hard roof structure and energy transfer engineering structure on the mining field before ground vertical well fracturing is implemented, and the second model is a model of the thick hard roof structure and energy transfer engineering structure on the mining field after ground vertical well fracturing is implemented.

[0043] As a way to achieve this, based on the lithology exposed by typical borehole columns in a coal mine working face with frequent mine earthquakes, a thick hard roof structure and energy transfer engineering structure model over the mining area was established to analyze the structural morphology of the overlying rock and the energy transfer law of the thick hard roof fracture before and after the implementation of ground vertical well fracturing, and to explain the principle of energy release modification by ground vertical well fracturing to prevent and control mine earthquakes.

[0044] It should be noted that, based on the analysis of the thickness and lithology of the rock strata exposed by the selected typical drill column, it can be seen that there are four thick hard roofs within 300m above the coal seam, and the mine earthquakes that have occurred in the working face are mostly in the four thick hard roofs. Therefore, the analysis of the overlying rock structure formed by the breaking of the four thick hard roofs and the characteristics of the breaking energy release is representative of the principle of ground vertical well fracturing energy release modification to prevent and control mine earthquakes.

[0045] It should also be noted that ground vertical well fracturing is to construct a vertical well of a certain depth into the formation on the ground, and perform staged fracturing in the target rock formation that needs to be fractured. According to the needs, multiple layers of thick hard roof plates can be fractured to achieve full pressure relief and weakening of the multiple layers of thick hard roof plates, thereby reducing their strength. The schematic diagram of ground vertical well fracturing of thick hard roof plates is shown in the figure below. Figure 2 shown.

[0046] As the thick hard roof structure overlying the mining area and the characteristics of energy transfer released by its fracture have a significant impact on the occurrence of mine earthquakes, a model of the thick hard roof structure and energy transfer engineering structure overlying the mining area without and with surface vertical well fracturing is established to clarify the energy transfer path of the thick hard roof before and after surface vertical well fracturing and the attenuation effect of surface vertical well fracturing on the thick hard roof fracture energy, analyze the energy transfer law of the thick hard roof fracture, and quantitatively characterize the transferred energy.

[0047] Step S102, based on the first model, obtain the first total energy released and transmitted to the surface when the low-level thick hard roof plate is periodically broken and the high-level thick hard roof plate is initially broken without implementing surface vertical well fracturing, and obtain the second total energy released and transmitted to the surface when each thick hard roof plate is periodically broken without implementing surface vertical well fracturing.

[0048] It should be noted that when the thick hard roof on the mining site is not subjected to ground vertical well fracturing and pressure relief, as the working face is mined, the overlying rock strata on the mining site are broken layer by layer from bottom to top. Since the thick hard roof is relatively strong and not easy to collapse, the low-position thick hard roof forms a cantilever beam structure, and the high-position thick hard roof has not reached the initial breaking step and is in a suspended state. The existence of the suspended structure of multiple layers of thick hard roof on the mining site causes a high stress concentration in front of the working face, and at the same time, energy is accumulated in the suspended area of ​​multiple layers of thick hard roof. The overlying rock structure and accumulated energy before the initial breaking of the high-position thick hard roof are shown in the figure below. Figure 3 As the working face continues to be mined, the thick hard roof breaks under the overburden load. At this time, the elastic energy accumulated in the thick hard roof is released instantly and propagates along a certain path. The overburden structure and energy transfer diagram of the initial break of the high-position thick hard roof without ground vertical well fracturing is shown in the figure below. Figure 4 shown.

[0049] In some embodiments, based on the first model, a first total energy is obtained when the low-level thick hard roof is periodically broken and the high-level thick hard roof is first broken without ground vertical well fracturing; including: based on the first model, the energy released when the low-level thick hard roof is periodically broken and the energy released when the high-level thick hard roof is first broken are obtained; based on the energy released when the low-level thick hard roof is periodically broken and the high-level thick hard roof is first broken without ground vertical well fracturing, and the attenuation index and attenuation law of the energy released when the low-level thick hard roof is periodically broken and the high-level thick hard roof is first broken, as well as the attenuation index and attenuation law of the energy released when the thick hard roof is broken and transmitted to the surface in the rock mass, the first energy released and the second energy released and the high-level thick hard roof is first broken when the low-level thick hard roof is periodically broken and the high-level thick hard roof is first broken; sum the first energy and the second energy to obtain the first total energy.

[0050] In some embodiments, based on the first model, a method for obtaining energy released during periodic rupture of a low-position thick hard roof plate and energy released during initial rupture of a high-position thick hard roof plate without surface vertical well fracturing is obtained; including: based on the first model, obtaining the overburden load during periodic rupture of a low-position thick hard roof plate without surface vertical well fracturing, the overburden load during initial rupture of a high-position thick hard roof plate without surface vertical well fracturing, the periodic rupture step distance of a low-position thick hard roof plate without surface vertical well fracturing, the initial rupture step distance of a high-position thick hard roof plate without surface vertical well fracturing, the elastic modulus of each thick hard roof plate without surface vertical well fracturing, and the moment of inertia of each thick hard roof plate; based on the first model, obtaining energy released ... high-position thick hard roof plate without surface vertical well fracturing The energy released when the low-position thick hard roof plate without surface vertical well fracturing is periodically broken is obtained based on the overburden load when the low-position thick hard roof plate without surface vertical well fracturing is periodically broken, the periodic breaking step of the low-position thick hard roof plate without surface vertical well fracturing, the elastic modulus of each thick hard roof plate without surface vertical well fracturing and the moment of inertia of each thick hard roof plate; the energy released when the high-position thick hard roof plate without surface vertical well fracturing is first broken is obtained based on the overburden load when the high-position thick hard roof plate without surface vertical well fracturing is first broken, the initial breaking step of the high-position thick hard roof plate without surface vertical well fracturing, the elastic modulus of each thick hard roof plate without surface vertical well fracturing and the moment of inertia of each thick hard roof plate.

[0051] by Figure 4 Taking the overburden structure when the high-position thick hard roof plate is first broken without surface vertical well fracturing as an example, based on the first model, the energy released when the low-position thick hard roof plate is periodically broken and the energy released when the high-position thick hard roof plate is first broken are obtained; including: based on the first model, the energy released when the low-position thick hard roof plate is periodically broken and the energy released when the high-position thick hard roof plate is first broken are obtained by the following formula (1):

[0052]

[0053] Among them, U 1 , U 2They are the energy released during the I and II cycles of the low-lying thick hard roof without surface vertical well fracturing; U 3c , U 4c They are the energy released when the high-position thick hard roof III and IV are first broken without surface vertical well fracturing; q 1 ,q 2 are the overburden loads during the I and II cycle rupture of the low-lying thick hard roof without surface vertical well fracturing; q 3c ,q 4c are the overburden loads at the initial rupture of high-position thick hard roof III and IV without surface vertical well fracturing; L 1 , L 2 are the periodic fracture steps of low-lying thick hard roof I and II without surface vertical well fracturing; L 3c , L 4c They are the initial fracture step distances of high-position thick hard roof III and IV without surface vertical well fracturing; E 1 ~E 4 are the elastic moduli of each thick hard roof plate without vertical well fracturing on the ground; J 1 ~J 4 are the moments of inertia of each thick hard top plate.

[0054] Therefore, according to the calculation method of the energy released during the initial breaking and periodic breaking of the thick hard roof, the energy released during the periodic breaking of the low-level thick hard roof and the initial breaking of the high-level thick hard roof without surface vertical well fracturing can be obtained.

[0055] It should be noted that the energy released when the thick hard roof breaks decays in the rock mass in an exponential form, the attenuation exponent (damping) is ξ, and the attenuation law is U g =Ur -ξ , then the energy released and transferred to the surface during the periodic breaking of the low-level thick hard roof and the initial breaking of the high-level thick hard roof can be calculated by the following formula.

[0056] In some embodiments, the first energy ( and ) and the second energy released when the high-rise thick hard roof breaks for the first time and transferred to the surface ( and ):

[0057]

[0058] Among them, r 1 ~r 4 is the distance from the energy release position of each thick hard roof to the ground surface; ξ 1 ~ξ 4It is the energy attenuation index of the energy released when each thick hard roof is broken and transmitted to the surface without surface vertical well fracturing.

[0059] According to the above analysis, the first total energy U released when the low-level thick hard roof is broken periodically and the high-level thick hard roof is broken for the first time without surface vertical well fracturing is transmitted to the surface. c for:

[0060]

[0061] The above describes a method for obtaining energy released when a high-position thick hard roof is initially broken and the energy released and transferred to the ground surface. The following describes a method for obtaining energy released when a high-position thick hard roof is periodically broken and the energy released and transferred to the ground surface.

[0062] It should be noted that after the initial breakage, the high-level thick hard roof of the working face broke periodically as the working face continued to be mined. Since the thick hard roof was not subjected to ground vertical well fracturing and pressure relief, the thick hard roof formed a cantilever beam structure during the mining process of the working face. The existence of multiple layers of thick hard roof hanging structures on the mining site caused a high stress concentration in front of the working face, and energy accumulated in the multiple layers of thick hard roof hanging area. The overburden structure and accumulated energy before the periodic breakage of the high-level thick hard roof are shown in the figure below. Figure 5 As the working face continues to be mined, the thick hard roof breaks under the overburden load. At this time, the elastic energy accumulated in the thick hard roof is released instantly and propagates along a certain path. The overburden structure and energy transfer when the high-position thick hard roof is cyclically broken without ground vertical well fracturing are shown in the figure below. Figure 6 shown.

[0063] by Figure 6 Taking the overburden structure when the high-position thick hard roof is broken periodically without surface vertical well fracturing as an example, according to the calculation method of the energy released when the thick hard roof is broken periodically, the energy released when each thick hard roof is broken periodically without surface vertical well fracturing can be obtained as follows:

[0064]

[0065] Among them, U 3z , U 4z They are the energy released when the high-position thick hard roof III and IV cycles are broken without surface vertical well fracturing; q 3z ,q 4z are the overburden loads when the high-position thick hard roof is broken during cycles III and IV without surface vertical well fracturing; L 3z , L 4z They are the periodic fracture steps of high-position thick hard roof III and IV without surface vertical well fracturing.

[0066] Similarly, according to the energy transfer law of roof breakage, the energy released and transferred to the surface during the periodic breakage of each thick hard roof is:

[0067]

[0068] According to the above analysis, the second total energy released when each thick hard roof plate is broken periodically and transferred to the surface without surface vertical well fracturing is:

[0069]

[0070] Therefore, this step obtains the first total energy released and transmitted to the surface when the low-level thick hard roof plate is periodically broken and the high-level thick hard roof plate is broken for the first time without implementing ground vertical well fracturing, and obtains the second total energy released and transmitted to the surface when each thick hard roof plate is periodically broken without implementing ground vertical well fracturing.

[0071] Step S103, based on the second model, obtain the third total energy released and transmitted to the surface when the low-level thick hard roof plate is periodically broken and the high-level thick hard roof plate is initially broken during the implementation of ground vertical well fracturing, and obtain the fourth total energy released and transmitted to the surface when each thick hard roof plate is periodically broken during the implementation of ground vertical well fracturing.

[0072] It should be noted that after the thick hard roof on the mining site is depressurized by ground vertical well fracturing, as the working face is mined, the overlying rock strata on the mining site are broken layer by layer from bottom to top. The ground vertical well fracturing weakens the strength of the thick hard roof and reduces its integrity, realizing the modification of the thick hard rock strata. Therefore, during the mining process of the working face, the overlying rock strata can be broken and collapsed in time. When the thick hard roof is broken, the elastic energy accumulated in the thick hard rock strata is released instantly and propagates along a certain path. The diagram of the overlying rock structure and energy transfer when the high-position thick hard roof is broken for the first time after the ground vertical well fracturing is shown in the figure below. Figure 7 shown.

[0073] by Figure 7 Taking the overburden structure of the high-position thick hard roof plate at the initial break after the vertical well fracturing shown in FIG. as an example, according to the calculation method of the energy released during the initial break and periodic break of the thick hard roof plate, the energy released during the periodic break of the low-position thick hard roof plate and the initial break of the high-position thick hard roof plate during the vertical well fracturing on the ground can be obtained as follows:

[0074]

[0075] Among them, U′ 1 , U′ 2 U′ is the energy released during the rupture of the low-lying thick hard roof in the vertical well fracturing on the ground during the I and II cycles; 3c , U′ 4cThe energy released when the high-position thick hard roof III and IV are first broken during the vertical well fracturing on the ground; L′ 1 , L′ 2 are the periodic fracture steps of low-lying thick hard roof I and II for vertical well fracturing on the ground; L′ 3c , L′ 4c are the initial fracture step distances of high-position thick hard roof III and IV for surface vertical well fracturing; q′ 1 ,q′ 2 are the overburden loads during the I and II cycle rupture of the low-lying thick hard roof during surface vertical well fracturing; q′ 3c ,q′ 4c are the overburden loads at the initial rupture of high-position thick hard roof III and IV during surface vertical well fracturing; E′ 1 ~E′ 4 They are the elastic moduli of each thick hard roof plate for surface vertical well fracturing.

[0076] Similarly, according to the energy transfer law of the thick hard roof breaking, the energy released and transferred to the surface during the periodic breaking of the low-position thick hard roof and the initial breaking of the high-position thick hard roof are:

[0077]

[0078] Among them, ξ′ 1 ~ξ′ 4 They are the energy attenuation indexes of the energy released when each thick hard roof is broken during the vertical well fracturing on the ground and the energy is transmitted to the surface.

[0079] According to the above analysis, the third total energy released and transmitted to the surface during the periodic breaking of the low-position thick hard roof and the initial breaking of the high-position thick hard roof in the vertical well fracturing is as follows:

[0080]

[0081] It should be noted that after the initial breakage, the high-position thick hard roof of the working face will experience periodic breakage as the working face continues to be mined. Since the thick hard roof has been subjected to ground vertical well fracturing and pressure relief, the strength of the thick hard roof has been weakened, its integrity has been reduced, and the thick hard rock formation has been modified. Therefore, the overburden formation can be broken and collapsed in time during the mining process of the working face. When the thick hard roof breaks, the elastic energy accumulated in the thick hard rock formation is released instantly and propagates along a certain path. The overburden structure and energy transfer during the periodic breakage of the high-position thick hard roof after ground vertical well fracturing are shown in the figure below. Figure 8 shown.

[0082] According to the calculation method of the energy released when the thick hard roof plate breaks periodically, the energy released when each thick hard roof plate breaks periodically during surface vertical well fracturing is:

[0083]

[0084] Among them, U′ 3z , U′ 4z The energy released during the fracture of high-position thick hard roof III and IV cycles in vertical well fracturing on the ground; q′ 3z ,q′ 4z are the overburden loads during the III and IV cycles of high-position thick hard roof fracture in vertical well fracturing on the ground; L′ 3z , L′ 4z They are the periodic fracture steps of high-position thick hard roof III and IV for surface vertical well fracturing.

[0085] Similarly, according to the energy transfer law of roof breakage, the energy released and transferred to the surface during the periodic breakage of each thick hard roof is:

[0086]

[0087] According to the above analysis, the fourth total energy released when each thick hard roof plate is broken periodically during the surface vertical well fracturing is:

[0088]

[0089] Therefore, this step obtains the third total energy released and transmitted to the surface when the low-level thick hard roof plate is periodically broken and the high-level thick hard roof plate is initially broken during ground vertical well fracturing, as well as the fourth total energy released and transmitted to the surface when each thick hard roof plate is periodically broken.

[0090] Step S104, based on the first total energy, the second total energy, the third total energy and the fourth total energy, obtain the analysis results of the fracturing energy release modification for preventing and controlling mining earthquakes in the vertical well on the thick hard roof.

[0091] It should be noted that after the implementation of ground vertical well fracturing in the thick hard rock layer overlying the mining site, a large number of mesh cracks with different orientations and lengths can be formed in the rock layer, which greatly weakens the strength of the thick hard roof and reduces its integrity, realizes the modification of the thick hard rock layer, and avoids the generation of large-scale hanging roof. The initial breaking step of the high-position thick hard roof of the working face is reduced. With the mining of the working face, the thick hard roof can be broken and collapsed in time, the periodic breaking step is reduced, the pressure strength is reduced, and at the same time, the degree of elastic energy accumulation of the large-area hanging roof of the overlying thick hard roof is reduced.

[0092] The parameters of energy released without surface vertical well fracturing and the parameters of energy released with surface vertical well fracturing can be compared to determine the main factors causing the energy change.

[0093] From the analysis of step S102 and step S103, it can be seen that the energy released when the thick hard roof is broken is proportional to the overburden load of the rock formation and the breaking step, and inversely proportional to the elastic modulus and moment of inertia of the rock formation. Surface vertical well fracturing significantly reduces the breaking step of the thick hard rock formation, increases the elastic modulus of the thick hard rock formation to a certain extent, and thus reduces the energy released when the thick hard roof is broken.

[0094] At the same time, the large number of artificial cracks formed in the rock formation by surface vertical well fracturing have a good absorption effect on the energy released when the roof breaks during the transmission process, that is, the energy transfer attenuation index increases after surface vertical well fracturing. Surface vertical well fracturing can reduce the energy released when the thick and hard roof breaks from the source, increase its attenuation during the energy transfer process, and ultimately make the energy transmitted to the surface significantly lower than when surface vertical well fracturing is not implemented, lower than the critical energy for mine tremors, avoid mine tremors, and thus reduce the frequency of mine tremors under thick and hard roof conditions, effectively preventing and controlling mine tremors.

[0095] In some embodiments, the critical energy for the occurrence of mine tremors is obtained; based on the first total energy, the second total energy, the third total energy, the fourth total energy and the critical energy for the occurrence of mine tremors (U 0 ), and the first mine earthquake occurrence index (K) was obtained when the low-level thick hard roof was broken periodically and the high-level thick hard roof was broken for the first time without surface vertical well fracturing. c ), the second mine shock index when the thick hard roof is broken periodically without surface vertical well fracturing (K z ), the third mine earthquake occurrence index (K′) when the low-level thick hard roof plate breaks periodically and the high-level thick hard roof plate breaks for the first time during surface vertical well fracturing c ) and the fourth mine earthquake index (K′) during the periodic breaking of the thick hard roof during the vertical well fracturing on the ground z ); Based on the first mine earthquake occurrence index, the second mine earthquake occurrence index, the third mine earthquake occurrence index and the fourth mine earthquake occurrence index, determine the conditions for the occurrence of mine earthquakes when ground vertical well fracturing is not implemented in thick hard roof and the conditions for the non-occurrence of mine earthquakes when ground vertical well fracturing is implemented in thick hard roof.

[0096] That is to say, the ratio of the total energy released by the breaking of the thick hard roof over the mining area and transmitted to the surface to the critical energy of the mine earthquake is defined as the mine earthquake occurrence index. The mine earthquake occurrence index when each thick hard roof is broken periodically without surface vertical well fracturing Mine earthquake occurrence index during periodic breaking of low-level thick hard roof and initial breaking of high-level thick hard roof in vertical well fracturing on the ground The mine earthquake occurrence index at the time of periodic breaking of each thick hard roof after surface vertical well fracturing

[0097] The conditions for the occurrence of mine earthquakes in thick hard roof without vertical well fracturing are: or The conditions for no mine tremor to occur during vertical well fracturing on the thick hard roof are: and

[0098] It should be noted that the critical energy of mine earthquake is U 0 It is related to factors such as working face geology and mining conditions.

[0099] This embodiment explains the principle of energy release modification of thick hard roof surface vertical well fracturing to prevent and control mine earthquakes by analyzing the weakening and modification effect of ground vertical well fracturing on the strength of thick hard roof, the weakening effect of energy release of thick hard roof breakage, and the attenuation effect of energy release of thick hard roof breakage in the process of transmission in the fracturing artificial fracture network area, which has important theoretical and practical significance for improving the effect of ground vertical well fracturing on preventing and controlling mine earthquakes and the promotion and application of this technology. For example, on the basis of knowing the principle of energy release modification of ground vertical well fracturing on thick hard roof, when implementing ground vertical well fracturing unloading project to prevent and control mine earthquakes, the design parameters of ground vertical well fracturing can be adjusted to obtain better effect of preventing and controlling mine earthquakes.

[0100] The method for analyzing the energy release modification of the thick hard roof of the coal mine field by ground vertical well fracturing in the embodiment of the present application for preventing and controlling mine earthquakes, by establishing the thick hard roof structure and energy transfer engineering structure model of the mine field where ground vertical well fracturing is not implemented and where ground vertical well fracturing is implemented, the energy transfer path of the thick hard roof breakage before and after the ground vertical well fracturing pressure relief and the weakening effect of the ground vertical well fracturing on the thick hard roof breakage energy are explained, the energy transfer law of the thick hard roof breakage is analyzed, and the transferred energy is quantitatively characterized; by comparing and analyzing the first total energy released and transferred to the ground when the low-position thick hard roof is periodically broken and the high-position thick hard roof is first broken when the ground vertical well fracturing is not implemented, the second total energy released and transferred to the ground when the thick hard roof is periodically broken when the ground vertical well fracturing is not implemented is obtained, and the actual The third total energy released and transmitted to the surface when the low-level thick hard roof is periodically broken and the high-level thick hard roof is first broken during ground vertical well fracturing, as well as the fourth total energy released and transmitted to the surface when each thick hard roof is periodically broken during ground vertical well fracturing and the calculation parameters are clarified. The weakening and modification effect of ground vertical well fracturing on the strength of the thick hard roof, the weakening effect on the energy released by the breaking of the thick hard roof, and the attenuation effect on the energy released by the breaking of the thick hard roof during the transmission process in the artificial fracture network area of ​​the fracturing are clarified. The principle of energy release modification for preventing and controlling mine earthquakes by ground vertical well fracturing of thick hard roof is explained, so as to better implement ground vertical well fracturing unloading engineering to prevent and control mine earthquakes. It has important theoretical and practical significance for improving the effect of preventing and controlling mine earthquakes by ground vertical well fracturing of thick hard roof and promoting the application of this technology.

[0101] In order to realize the above-mentioned embodiment, the present application also proposes a coal mine field thick hard roof ground vertical well fracturing energy release modified mine earthquake analysis device. Fig. 9 This is a block diagram of a coal mine field thick hard roof ground vertical well fracturing energy release modified mine earthquake analysis device provided in the embodiment of the present application. Fig. 9 As shown, the coal mine thick hard roof ground vertical well fracturing energy release modified mine earthquake analysis device may include: a model building module 201, an energy calculation module 202 and a result analysis module 203.

[0102] The model building module 201 is used to establish a first model and a second model, wherein the first model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field before vertical well fracturing is implemented, and the second model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field after vertical well fracturing is implemented;

[0103] The energy calculation module 202 is used to obtain, based on the first model, a first total energy released and transmitted to the ground surface when the low-position thick hard roof plate is broken periodically and the high-position thick hard roof plate is broken for the first time without surface vertical well fracturing, and to obtain a second total energy released and transmitted to the ground surface when each thick hard roof plate is broken periodically without surface vertical well fracturing;

[0104] The energy calculation module 202 is further used to obtain, based on the second model, a third total energy released and transmitted to the ground surface when the low-position thick hard roof plate is periodically broken and the high-position thick hard roof plate is initially broken during ground vertical well fracturing, and a fourth total energy released and transmitted to the ground surface when each thick hard roof plate is periodically broken during ground vertical well fracturing;

[0105] The result analysis module 203 is used to obtain the analysis results of the fracturing energy release modification and mine earthquake prevention and control in the vertical well on the thick hard roof based on the first total energy, the second total energy, the third total energy and the fourth total energy.

[0106] Further, in a possible implementation of the embodiment of the present application, the energy calculation module 202 obtains, based on the first model, a first total energy released and transmitted to the ground surface when the low-position thick hard roof plate is periodically broken and the high-position thick hard roof plate is first broken without implementing ground vertical well fracturing;

[0107] Based on the first model, the energy released during the periodic rupture of the low-position thick hard roof plate and the energy released during the initial rupture of the high-position thick hard roof plate without surface vertical well fracturing are obtained;

[0108] Based on the energy released during the periodic breaking of the low-position thick hard roof and the energy released during the initial breaking of the high-position thick hard roof, as well as the attenuation index and attenuation law of the energy released during the breaking of the thick hard roof in the rock mass, the first energy released during the periodic breaking of the low-position thick hard roof and the second energy released during the initial breaking of the high-position thick hard roof without surface vertical well fracturing are obtained.

[0109] The first energy and the second energy are summed to obtain a first total energy.

[0110] Further, in a possible implementation of the embodiment of the present application, the energy calculation module 202, when acquiring, based on the first model, a method for releasing energy when a low-position thick hard roof plate is periodically broken and a method for releasing energy when a high-position thick hard roof plate is initially broken without implementing surface vertical well fracturing, is used to:

[0111] Based on the first model, the overburden load when the low-position thick hard roof plate is periodically broken without surface vertical well fracturing, the overburden load when the high-position thick hard roof plate is initially broken without surface vertical well fracturing, the periodic breaking step distance of the low-position thick hard roof plate without surface vertical well fracturing, the initial breaking step distance of the high-position thick hard roof plate without surface vertical well fracturing, the elastic modulus of each thick hard roof plate without surface vertical well fracturing, and the moment of inertia of each thick hard roof plate are obtained;

[0112] Based on the overburden load when the low-position thick hard roof plate without surface vertical well fracturing is periodically broken, the periodic breaking step of the low-position thick hard roof plate without surface vertical well fracturing, the elastic modulus of each thick hard roof plate without surface vertical well fracturing, and the moment of inertia of each thick hard roof plate, the energy released when the low-position thick hard roof plate without surface vertical well fracturing is periodically broken is obtained;

[0113] Based on the overlying load when the high-position thick hard roof plate without surface vertical well fracturing is first broken, the initial breaking step of the high-position thick hard roof plate without surface vertical well fracturing, the elastic modulus of each thick hard roof plate without surface vertical well fracturing and the moment of inertia of each thick hard roof plate, the energy released when the high-position thick hard roof plate without surface vertical well fracturing is first broken is obtained.

[0114] Further, in a possible implementation of the embodiment of the present application, the energy calculation module 202 obtains the energy released when the low-position thick hard roof plate is periodically broken and the energy released when the high-position thick hard roof plate is first broken based on the first model without implementing surface vertical well fracturing; and is used to:

[0115] Based on the first model, the energy released during the periodic rupture of the low-position thick hard roof plate and the energy released during the initial rupture of the high-position thick hard roof plate without surface vertical well fracturing are obtained by the first formula. The first formula is expressed as follows:

[0116]

[0117] Among them, U 1 , U 2 They are the energy released during the I and II cycles of the low-lying thick hard roof without surface vertical well fracturing; U 3c , U 4c They are the energy released when the high-position thick hard roof III and IV are first broken without surface vertical well fracturing; q 1 ,q2 are the overburden loads during the I and II cycle rupture of the low-lying thick hard roof without surface vertical well fracturing; q 3c ,q 4c are the overburden loads at the initial rupture of high-position thick hard roof III and IV without surface vertical well fracturing; L 1 , L 2 are the periodic fracture steps of low-lying thick hard roof I and II without surface vertical well fracturing; L 3c , L 4c They are the initial fracture step distances of high-position thick hard roof III and IV without surface vertical well fracturing; E 1 ~E 4 are the elastic moduli of each thick hard roof plate without vertical well fracturing on the ground; J 1 ~J 4 are the moments of inertia of each thick hard top plate.

[0118] Further, in a possible implementation of the embodiment of the present application, the energy calculation module 202 obtains the first energy released and transmitted to the ground surface when the low-position thick hard roof is periodically broken and the second energy released and transmitted to the ground surface when the high-position thick hard roof is initially broken based on the energy released when the low-position thick hard roof is periodically broken and the energy released when the high-position thick hard roof is initially broken, as well as the attenuation index and attenuation law of the energy released when the thick hard roof is broken in the rock mass; and is used to:

[0119] Based on the energy released during the periodic breaking of the low-position thick hard roof and the energy released during the initial breaking of the high-position thick hard roof, as well as the attenuation index and attenuation law of the energy released during the breaking of the thick hard roof in the rock mass, the first energy released during the periodic breaking of the low-position thick hard roof without surface vertical well fracturing and the second energy released during the initial breaking of the high-position thick hard roof are obtained by the second formula. The second formula is expressed as follows:

[0120]

[0121] Among them, r 1 ~r 4 is the distance from the energy release position of each thick hard roof to the ground surface; ξ 1 ~ξ 4 It is the energy attenuation index of the energy released when each thick hard roof is broken and transmitted to the surface without surface vertical well fracturing.

[0122] Furthermore, in a possible implementation of the embodiment of the present application, the result analysis module 203 is specifically used to:

[0123] Obtain the critical energy for mine earthquake;

[0124] Based on the first total energy, the second total energy, the third total energy, the fourth total energy and the critical energy for the occurrence of mine tremors, a first mine tremor occurrence index is obtained when the low-position thick hard roof is periodically broken and the high-position thick hard roof is broken for the first time without implementing surface vertical well fracturing, a second mine tremor occurrence index is obtained when the thick hard roof is periodically broken without implementing surface vertical well fracturing, a third mine tremor occurrence index is obtained when the low-position thick hard roof is periodically broken and the high-position thick hard roof is broken for the first time with surface vertical well fracturing, and a fourth mine tremor occurrence index is obtained when the thick hard roof is periodically broken with implementing surface vertical well fracturing;

[0125] Based on the first mine earthquake occurrence index, the second mine earthquake occurrence index, the third mine earthquake occurrence index and the fourth mine earthquake occurrence index, the conditions for the occurrence of mine earthquakes when ground vertical well fracturing is not implemented in thick hard roof and the conditions for the non-occurrence of mine earthquakes when ground vertical well fracturing is implemented in thick hard roof are determined.

[0126] It should be noted that the aforementioned explanation of the embodiment of the method for preventing and controlling mine earthquakes by fracturing energy release and modification of vertical wells with thick hard roof on the ground in coal mines is also applicable to the device for preventing and controlling mine earthquakes by fracturing energy release and modification of vertical wells with thick hard roof on the ground in coal mines of this embodiment, and will not be repeated here.

[0127] In order to implement the above embodiment, the present application also proposes an electronic device. Fig.10 , Fig.10 is a block diagram of an electronic device provided in an embodiment of the present application. Fig.10 As shown, the electronic device 1000 includes: a processor 1001, and a memory 1002 communicatively connected to the processor 1001; the memory 1002 stores computer-executable instructions; the processor 1001 executes the computer-executable instructions stored in the memory to implement the method provided in the aforementioned embodiment.

[0128] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0129] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0130] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0131] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0132] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0133] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0134] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0135] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0136] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0137] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for analyzing the prevention and control of mine earthquakes by fracturing energy release modification of vertical wells on the surface of thick hard roof in coal mines, characterized in that: The following steps are involved: Establishing a first model and a second model, wherein the first model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field before surface vertical well fracturing is implemented, and the second model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field after surface vertical well fracturing is implemented; Based on the first model, a first total energy released and transmitted to the ground surface when a low-position thick hard roof plate is periodically broken and a high-position thick hard roof plate is initially broken is obtained without implementing surface vertical well fracturing, and a second total energy released and transmitted to the ground surface when each thick hard roof plate is periodically broken without implementing surface vertical well fracturing is obtained; Based on the second model, a third total energy is obtained when the low-position thick hard roof plate is periodically broken and the high-position thick hard roof plate is initially broken during surface vertical well fracturing, and a fourth total energy is obtained when the thick hard roof plates are periodically broken during surface vertical well fracturing and are released and transmitted to the surface; Based on the first total energy, the second total energy, the third total energy and the fourth total energy, the analysis results of fracturing energy release modification for preventing and controlling mine earthquakes in vertical wells on the ground with thick hard roof are obtained.

2. The method according to claim 1, characterized in that The first total energy released and transmitted to the ground surface when the low-position thick hard roof plate is periodically broken and the high-position thick hard roof plate is first broken is obtained based on the first model without implementing ground vertical well fracturing; including: Based on the first model, the energy released during the periodic rupture of the low-position thick hard roof plate and the energy released during the initial rupture of the high-position thick hard roof plate without surface vertical well fracturing are obtained; Based on the energy released when the low-position thick hard roof is broken periodically and the energy released when the high-position thick hard roof is broken for the first time, as well as the attenuation index and attenuation law of the energy released when the thick hard roof is broken and transmitted in the rock mass, the first energy released when the low-position thick hard roof is broken periodically and transmitted to the surface without surface vertical well fracturing and the second energy released when the high-position thick hard roof is broken for the first time and transmitted to the surface are obtained; The first energy and the second energy are summed to obtain the first total energy.

3. The method according to claim 2, characterized in that The method of obtaining the energy released when the low-position thick hard roof plate is periodically broken and the energy released when the high-position thick hard roof plate is first broken based on the first model without implementing surface vertical well fracturing, including: Based on the first model, the overburden load when the low-position thick hard roof plate is periodically broken without surface vertical well fracturing, the overburden load when the high-position thick hard roof plate is initially broken without surface vertical well fracturing, the periodic breaking step distance of the low-position thick hard roof plate without surface vertical well fracturing, the initial breaking step distance of the high-position thick hard roof plate without surface vertical well fracturing, the elastic modulus of each thick hard roof plate without surface vertical well fracturing, and the moment of inertia of each thick hard roof plate; Based on the overburden load when the low-position thick hard roof plate without surface vertical well fracturing is periodically broken, the periodic breaking step of the low-position thick hard roof plate without surface vertical well fracturing, the elastic modulus of each thick hard roof plate without surface vertical well fracturing, and the moment of inertia of each thick hard roof plate, the energy released when the low-position thick hard roof plate without surface vertical well fracturing is periodically broken is obtained; Based on the overlying load when the high-position thick hard roof plate without surface vertical well fracturing is first broken, the initial breaking step of the high-position thick hard roof plate without surface vertical well fracturing, the elastic modulus of each thick hard roof plate without surface vertical well fracturing and the moment of inertia of each thick hard roof plate, the energy released when the high-position thick hard roof plate without surface vertical well fracturing is first broken is obtained.

4. The method according to claim 2, characterized in that: The method of obtaining the energy released when the low-position thick hard roof plate is periodically broken and the energy released when the high-position thick hard roof plate is first broken based on the first model without implementing surface vertical well fracturing, including: Based on the first model, the energy released during the periodic rupture of the low-position thick hard roof plate and the energy released during the initial rupture of the high-position thick hard roof plate without surface vertical well fracturing are obtained by the first formula, and the first formula is expressed as follows: Among them, U1 and U2 are the energy released during the breaking of the low-lying thick hard roof in cycles I and II without surface vertical well fracturing; U 3c , U 4c are the energy released when the high-position thick hard roof III and IV are broken for the first time without vertical well fracturing on the surface; q1 and q2 are the overburden loads when the low-position thick hard roof I and II are broken for the periodic time without vertical well fracturing on the surface; q 3c ,q 4c are the overburden loads at the initial rupture of high-position thick hard roof plates III and IV without surface vertical well fracturing; L1 and L2 are the periodic rupture step lengths of low-position thick hard roof plates I and II without surface vertical well fracturing; L 3c , L 4c are the initial fracture steps of high-position thick hard roof plates III and IV without surface vertical well fracturing; E1~E4 are the elastic moduli of each thick hard roof plate without surface vertical well fracturing; J1~J4 are the moments of inertia of each thick hard roof plate.

5. The method according to claim 4, characterized in that The energy released when the low-position thick hard roof is broken periodically and the energy released when the high-position thick hard roof is broken for the first time, as well as the attenuation index and attenuation law of the energy released when the thick hard roof is broken and transmitted in the rock mass, obtains the first energy released when the low-position thick hard roof is broken periodically and transmitted to the surface, and the second energy released when the high-position thick hard roof is broken for the first time and transmitted to the surface without implementing ground vertical well fracturing; including: Based on the energy released during the periodic breaking of the low-position thick hard roof and the energy released during the initial breaking of the high-position thick hard roof, as well as the attenuation index and attenuation law of the energy released during the breaking of the thick hard roof in the rock mass, the first energy released during the periodic breaking of the low-position thick hard roof without surface vertical well fracturing and the second energy released during the initial breaking of the high-position thick hard roof are obtained by the second formula, and the second formula is expressed as follows: Among them, r1~r4 are the distances from the energy release position when each thick hard roof breaks to the ground surface; ξ1~ξ4 are the energy attenuation indexes of the energy released when each thick hard roof breaks without ground vertical well fracturing in the process of being transmitted to the ground surface.

6. The method according to claim 1, characterized in that The method of obtaining the analysis result of the fracturing energy release modification and prevention of mining earthquakes in vertical wells on the ground of thick hard roof based on the first total energy, the second total energy, the third total energy and the fourth total energy comprises: Obtain the critical energy for mine earthquake; Based on the first total energy, the second total energy, the third total energy, the fourth total energy and the critical energy for mine tremor occurrence, a first mine tremor occurrence index is obtained when a low-position thick hard roof is periodically broken and a high-position thick hard roof is initially broken without surface vertical well fracturing, a second mine tremor occurrence index is obtained when a thick hard roof is periodically broken without surface vertical well fracturing, a third mine tremor occurrence index is obtained when a low-position thick hard roof is periodically broken and a high-position thick hard roof is initially broken with surface vertical well fracturing, and a fourth mine tremor occurrence index is obtained when a thick hard roof is periodically broken with surface vertical well fracturing; Based on the first mine earthquake occurrence index, the second mine earthquake occurrence index, the third mine earthquake occurrence index and the fourth mine earthquake occurrence index, the conditions for mine earthquake occurrence when surface vertical well fracturing is not implemented in thick hard roof and the conditions for mine earthquake not occurring when surface vertical well fracturing is implemented in thick hard roof are determined.

7. A coal mine field thick hard roof ground vertical well fracturing energy release modified mine earthquake analysis device, characterized in that: include: A model building module, used to establish a first model and a second model, wherein the first model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field before surface vertical well fracturing is implemented, and the second model is a model of a thick hard roof structure and an energy transfer engineering structure on a mining field after surface vertical well fracturing is implemented; an energy calculation module, for obtaining, based on the first model, a first total energy released and transmitted to the ground surface when a low-position thick hard roof plate is periodically broken and a high-position thick hard roof plate is initially broken without surface vertical well fracturing, and a second total energy released and transmitted to the ground surface when each thick hard roof plate is periodically broken without surface vertical well fracturing; The energy calculation module is further used to obtain, based on the second model, a third total energy released and transmitted to the ground surface when the low-position thick hard roof plate is periodically broken and the high-position thick hard roof plate is initially broken during ground vertical well fracturing, and a fourth total energy released and transmitted to the ground surface when each thick hard roof plate is periodically broken during ground vertical well fracturing; A result analysis module is used to obtain an analysis result of fracturing energy release modification for preventing and controlling mining earthquakes in a vertical well on a thick hard roof surface based on the first total energy, the second total energy, the third total energy and the fourth total energy.

8. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 6 when executed by a processor.

10. A computer program product, characterized in that The invention comprises a computer program, which implements the method according to any one of claims 1 to 6 when being executed by a processor.

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