Methods, systems, electronic equipment and media for measuring the top coal lump size distribution in fully mechanized caving mining

Abstract

This invention discloses a method, system, electronic equipment, and medium for measuring the top coal lump size distribution in fully mechanized caving mining, relating to the field of top coal lump size distribution measurement. The method includes: acquiring parameters of the fully mechanized caving mining face; these parameters include gas content, top coal thickness, coal seam dip angle, number of large top coal lumps, and space below the tail beam; selecting one of three methods—dispersed measurement on the conveyor belt, stacked measurement on the scraper, or stacked measurement on the scraper—as the top coal lump size distribution measurement method based on the selected method, and determining the measurement result based on the chosen method; this invention can accurately determine the measurement result of the top coal lump size distribution in fully mechanized caving mining.

Description

Technical Field

[0001] This invention relates to the field of top coal block size distribution measurement, and in particular to a method, system, electronic device and medium for measuring the top coal block size distribution in fully mechanized caving mining. Background Technology

[0002] Since its introduction to my country, fully mechanized longwall top coal mining technology has yielded significant results in areas such as top coal crushing mechanisms, top coal release patterns, and the relationship between supports and surrounding rock. The top coal crushing mechanism and top coal release patterns are core aspects of fully mechanized longwall top coal mining, as the degree of top coal crushing directly affects the top coal release efficiency of the longwall face. Currently, the influence of top coal block size on the top coal release pattern is mostly studied through laboratory experiments or numerical simulations, examining aspects such as arching characteristics during coal release with different top coal block sizes, the maximum release size of top coal blocks, and changes in top coal recovery rate under different block sizes. However, most experiments have used uniformly sized coal blocks for release simulation, while studies on release experiments under different top coal block size distributions and their impact on the top coal release pattern are relatively rare. Further in-depth research is needed to systematically analyze the variations in the top coal release body, coal-rock interface, particle transport trajectory, velocity field, and force chain field under different block size distributions.

[0003] Before systematically analyzing the variation patterns of top coal discharge body, coal-rock interface, particle migration trajectory, velocity field, and force chain field under different block size distributions, it is first necessary to accurately determine the measurement results of top coal block size distribution in fully mechanized top coal mining. Currently, there are relatively few studies on accurately determining the measurement results of top coal block size distribution in fully mechanized top coal mining. Summary of the Invention

[0004] The purpose of this invention is to provide a method, system, electronic device and medium for measuring the top coal block size distribution in fully mechanized longwall mining, which can accurately determine the measurement results of the top coal block size distribution in fully mechanized longwall mining.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] In a first aspect, the present invention provides a method for measuring the top coal block size distribution in fully mechanized caving mining, comprising:

[0007] Obtain parameters of the fully mechanized longwall mining face; the parameters of the fully mechanized longwall mining face include gas content, top coal thickness, coal seam dip angle, number of large top coal blocks, and space below the tail beam;

[0008] Based on the parameters of the fully mechanized longwall mining face, the method for measuring the top coal block size distribution is determined, and the measurement results of the top coal block size distribution in fully mechanized longwall mining are determined based on the determined method for measuring the top coal block size distribution.

[0009] When the parameters of the fully mechanized longwall mining face meet the first condition, the top coal block size distribution measurement method is determined to be the belt conveyor decentralized measurement method; the first condition is that the gas content is within a first set range, the top coal thickness is within a second set range, the coal seam dip angle is within a third set range, the large-block top coal is within a fourth set range, and the space below the tail beam is within a fifth set range.

[0010] When the parameters of the fully mechanized longwall mining face meet the second condition, the measurement method for the top coal block size distribution is determined to be the scraper plate accumulation measurement method; the second condition is that the gas content is within the sixth set range, the top coal thickness is within the seventh set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the tenth set range.

[0011] When the parameters of the fully mechanized longwall mining face meet the third condition, the top coal block size distribution measurement method is determined to be the distributed measurement method on the scraper; the third condition is that the gas content is within the sixth set range, the top coal thickness is within the second set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the fifth set range.

[0012] Wherein, the minimum value in the first set range is greater than the maximum value in the sixth set range; the minimum value in the second set range is greater than the maximum value in the seventh set range; the minimum value in the third set range is greater than the maximum value in the eighth set range; the minimum value in the fourth set range is greater than the maximum value in the ninth set range; and the maximum value in the fifth set range is less than the minimum value in the tenth set range.

[0013] Optionally, the method for measuring the top coal block size distribution in fully mechanized caving mining is applied to the top coal block transport device in fully mechanized caving mining; the top coal block transport device in fully mechanized caving mining includes a scraper conveyor, a transfer conveyor, a crusher, a belt conveyor, and a support coal discharge port;

[0014] The scraper conveyor, the transfer conveyor, the crusher, and the belt conveyor are connected in sequence according to the direction of top coal block transmission;

[0015] The coal discharge port of the support is located inside the support assembly; the support assembly consists of two rows of parallel supports; each row of supports consists of multiple supports.

[0016] The scraper conveyor includes a front scraper conveyor and a rear scraper conveyor, with the front scraper conveyor located on one side of a row of supports and the rear scraper conveyor located on one side of another row of supports.

[0017] Optionally, the belt-mounted distributed measurement method refers to selecting a suitable measurement support for coal discharge operation, keeping the rear scraper conveyor and belt conveyor working, stopping the front scraper conveyor and crusher, and waiting for the top coal block size to be delivered to the belt conveyor by the rear scraper conveyor before shutting down the belt conveyor and starting to measure the block size and quality of the top coal block to obtain the measurement results of the top coal block size distribution in fully mechanized mining.

[0018] Optionally, the measurement location corresponding to the distributed measurement method on the belt is the marked area of ​​the belt conveyor; the marked area of ​​the belt conveyor is the part near the goaf.

[0019] Optionally, the scraper-mounted stacking measurement method refers to stopping the operation of the fully mechanized top coal block transport device, entering the space under the tail beam from the gap between two adjacent supports, selecting a suitable position to measure the block size and quality of the top coal block, and obtaining the measurement results of the block size distribution of the fully mechanized top coal block.

[0020] Optionally, the decentralized measurement method on the scraper refers to the method of shutting down only the front scraper conveyor and crusher, while the rest of the equipment of the fully mechanized top coal block transportation device is operating normally, and measuring the block size and quality of the top coal block at a suitable position in the space under the tail beam of the support to obtain the measurement results of the block size distribution of the fully mechanized top coal block.

[0021] Secondly, the present invention provides a system for measuring the top coal block size distribution in fully mechanized caving mining, comprising:

[0022] The data acquisition module is used to acquire parameters of the fully mechanized longwall mining face; the parameters of the fully mechanized longwall mining face include gas content, top coal thickness, coal seam dip angle, number of large top coal blocks, and space below the tail beam;

[0023] The module for determining the measurement results of top coal block size distribution in fully mechanized caving mining is used to determine the measurement method of top coal block size distribution based on the parameters of the fully mechanized caving mining face, and to determine the measurement results of top coal block size distribution in fully mechanized caving mining based on the determined measurement method of top coal block size distribution.

[0024] When the parameters of the fully mechanized longwall mining face meet the first condition, the top coal block size distribution measurement method is determined to be the belt conveyor decentralized measurement method; the first condition is that the gas content is within a first set range, the top coal thickness is within a second set range, the coal seam dip angle is within a third set range, the large-block top coal is within a fourth set range, and the space below the tail beam is within a fifth set range.

[0025] When the parameters of the fully mechanized longwall mining face meet the second condition, the measurement method for the top coal block size distribution is determined to be the scraper plate accumulation measurement method; the second condition is that the gas content is within the sixth set range, the top coal thickness is within the seventh set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the tenth set range.

[0026] When the parameters of the fully mechanized longwall mining face meet the third condition, the top coal block size distribution measurement method is determined to be the distributed measurement method on the scraper; the third condition is that the gas content is within the sixth set range, the top coal thickness is within the second set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the fifth set range.

[0027] Wherein, the minimum value in the first set range is greater than the maximum value in the sixth set range; the minimum value in the second set range is greater than the maximum value in the seventh set range; the minimum value in the third set range is greater than the maximum value in the eighth set range; the minimum value in the fourth set range is greater than the maximum value in the ninth set range; and the maximum value in the fifth set range is less than the minimum value in the tenth set range.

[0028] Thirdly, the present invention provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to cause the electronic device to perform the method for measuring the top coal block size distribution in fully mechanized caving mining according to the first aspect.

[0029] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for measuring the top coal block size distribution in fully mechanized caving mining as described in the first aspect.

[0030] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0031] This invention provides three methods for measuring the top coal lump size distribution. All three methods can be used to measure the top coal lump size distribution in fully mechanized longwall mining, each with its own advantages and disadvantages. Based on the different coal seam thickness, dip angle, gas content, broken top coal lump size, and space size under the tail beam in the fully mechanized longwall mining face, the most suitable measurement method is selected and measured. The measurement result is then used as the top coal lump size distribution measurement result for that fully mechanized longwall mining face, realizing the measurability of the top coal lump size distribution in fully mechanized longwall mining. Overall, the field measurement of top coal lump size distribution provides a data foundation for indoor coal release experiments and numerical calculations. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the longwall top coal block transport device of the present invention;

[0034] Figure 2 This is a flowchart illustrating the method for measuring the top coal block size distribution in fully mechanized caving mining according to the present invention.

[0035] Figure 3 This is a schematic diagram illustrating the length transformation relationship of the present invention;

[0036] Figure 4 This is a schematic diagram of the top coal block size distribution measurement system for fully mechanized caving mining according to the present invention. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] The method for measuring the top coal lump size distribution in fully mechanized caving mining provided in this invention is applied to... Figure 1 The image shows the top coal block transport device in fully mechanized caving mining.

[0041] like Figure 1 As shown, the device includes a scraper conveyor, a transfer conveyor, a crusher 3, a belt conveyor 4, and a support coal discharge port 5.

[0042] According to the direction of top coal block transmission, the scraper conveyor, the transfer conveyor, the crusher 3, and the belt conveyor 4 are connected in sequence;

[0043] The coal discharge port 5 of the support is located inside the support assembly; the support assembly consists of two rows of parallel supports; each row of supports consists of multiple supports.

[0044] The scraper conveyor includes a front scraper conveyor 1 and a rear scraper conveyor 2, with the front scraper conveyor 1 located on one side of a row of supports and the rear scraper conveyor 2 located on one side of another row of supports.

[0045] like Figure 2 As shown in the figure, the method for measuring the top coal block size distribution in fully mechanized caving mining provided by this invention includes the following steps.

[0046] Step 100: Obtain parameters of the fully mechanized longwall mining face; the parameters of the fully mechanized longwall mining face include gas content, top coal thickness, coal seam dip angle, number of large top coal blocks, and space below the tail beam.

[0047] Step 200: Determine the top coal block size distribution measurement method based on the parameters of the fully mechanized longwall mining face, and determine the top coal block size distribution measurement result based on the determined top coal block size distribution measurement method.

[0048] When the parameters of the fully mechanized longwall mining face meet the first condition, the top coal block size distribution measurement method is determined to be the belt conveyor decentralized measurement method; the first condition is that the gas content is within a first set range, the top coal thickness is within a second set range, the coal seam dip angle is within a third set range, the large-block top coal is within a fourth set range, and the space below the tail beam is within a fifth set range.

[0049] When the parameters of the fully mechanized longwall mining face meet the second condition, the top coal block size distribution measurement method is determined to be the scraper plate stacking measurement method; the second condition is that the gas content is within the sixth set range, the top coal thickness is within the seventh set range, the coal seam dip angle is within the eighth set range, the large top coal block size is within the ninth set range, and the space below the tail beam is within the tenth set range.

[0050] When the parameters of the fully mechanized longwall mining face meet the third condition, the top coal block size distribution measurement method is determined to be the distributed measurement method on the scraper; the third condition is that the gas content is within the sixth set range, the top coal thickness is within the second set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the fifth set range.

[0051] Wherein, the minimum value in the first set range is greater than the maximum value in the sixth set range; the minimum value in the second set range is greater than the maximum value in the seventh set range; the minimum value in the third set range is greater than the maximum value in the eighth set range; the minimum value in the fourth set range is greater than the maximum value in the ninth set range; and the maximum value in the fifth set range is less than the minimum value in the tenth set range.

[0052] The aforementioned belt-mounted distributed measurement method refers to selecting a suitable measurement support for coal discharge operation, keeping the rear scraper conveyor and belt conveyor working, stopping the front scraper conveyor and crusher, and waiting for the top coal block size to be delivered to the belt conveyor by the rear scraper conveyor before shutting down the belt conveyor and starting to measure the block size and quality of the top coal block to obtain the measurement results of the top coal block size distribution in fully mechanized top coal mining.

[0053] The belt-mounted distributed measurement method has the advantages of large measurement space, good air quality, unlimited measurement time, wide applicability and high safety factor. The measurement location should be selected at the last position on the belt conveyor (close to the goaf area). It is preferred for fully mechanized longwall mining faces with high gas content, thick top coal, large coal seam dip angle, many large top coal pieces and small space under the tail beam.

[0054] The scraper-mounted stacking measurement method refers to stopping the operation of the top coal block transportation device in fully mechanized caving mining, that is, shutting down the rear scraper conveyor, the front scraper conveyor, the loader and the crusher, etc., and entering the space under the tail beam from the gap between two adjacent supports, selecting a suitable position to measure the block size and quality of the top coal block, and obtaining the measurement results of the block size distribution of the top coal in fully mechanized caving mining.

[0055] The scraper-mounted stacking measurement method is faster for measuring thin top coal seams and avoids secondary breakage during subsequent transportation. When sampling, coal blocks on the surface of the stacked top coal body should be selected as much as possible. It is preferentially applicable to fully mechanized longwall mining faces with low gas content, thin top coal, small coal seam dip angle, few large top coal blocks, and large space under the tail beam.

[0056] The aforementioned decentralized measurement method on the scraper refers to a method in which only the front scraper conveyor and crusher are shut down, while the rest of the equipment of the fully mechanized top coal block transportation device is operating normally. The block size and quality of the top coal block are measured at a suitable position in the space under the tail beam to obtain the measurement results of the block size distribution of the fully mechanized top coal block.

[0057] The distributed measurement method on the scraper combines the advantages of the distributed measurement method on the belt conveyor and the stacked measurement method on the scraper. After the broken top coal blocks flow out of the coal discharge port, there is no possibility of further crushing. Moreover, the top coal blocks are dispersed on the rear scraper conveyor, making sampling easier and more accurate. The measurement location should be selected at the last position on the rear scraper conveyor (closest to the coal discharge port). It is preferentially applicable to fully mechanized longwall mining faces with low gas content, thick top coal, small coal seam dip angle, few large top coal blocks, and large space under the tail beam.

[0058] Based on the distributed measurement methods on the belt conveyor and the scraper conveyor, the relationship between the measurement length L2 on the belt conveyor and the measurement length L1 on the scraper conveyor is shown in formula (1), and their positions are as follows: Figure 3As shown.

[0059]

[0060] In the formula, L2 is the measured length on the belt conveyor, in meters (m).

[0061] w represents the width of the trough in the middle of the scraper conveyor, in meters;

[0062] l is the distance traveled by the first row of top coal particles on the belt conveyor, in meters;

[0063] v1 is the traction speed of the scraper conveyor, in m / s;

[0064] v2 The traction speed of the belt conveyor is in m / s;

[0065] L1 is the measured length on the scraper conveyor, in meters;

[0066] h is the vertical height from the surface of the scraper conveyor to the surface of the transfer conveyor, in meters;

[0067] g is the acceleration due to gravity, m / s² 2 ;

[0068] When using the belt-mounted distributed measurement method, the required measurement length L2 is calculated based on the actual site conditions.

[0069] If the coal seam conditions of a fully mechanized longwall mining face are good and suitable for two or more measurement methods, then the set of measurement results with the larger average top coal block size should be selected as the final top coal block size distribution measurement result.

[0070] Example 2

[0071] In order to implement the method corresponding to Embodiment 1 above and achieve the corresponding functions and technical effects, a top coal block size distribution measurement system for fully mechanized caving mining is provided below.

[0072] like Figure 4 As shown in the figure, an embodiment of the present invention provides a top coal block size distribution measurement system for fully mechanized caving mining, comprising:

[0073] The data acquisition module 11 is used to acquire parameters of the fully mechanized longwall mining face; the parameters of the fully mechanized longwall mining face include gas content, top coal thickness, coal seam dip angle, number of large top coal blocks, and space below the tail beam.

[0074] The module 12 for determining the measurement results of top coal block size distribution in fully mechanized caving mining is used to determine the measurement method of top coal block size distribution based on the parameters of the fully mechanized caving mining face, and to determine the measurement results of top coal block size distribution in fully mechanized caving mining based on the determined measurement method of top coal block size distribution.

[0075] When the parameters of the fully mechanized longwall mining face meet the first condition, the top coal block size distribution measurement method is determined to be the belt conveyor decentralized measurement method; the first condition is that the gas content is within a first set range, the top coal thickness is within a second set range, the coal seam dip angle is within a third set range, the large-block top coal is within a fourth set range, and the space below the tail beam is within a fifth set range.

[0076] When the parameters of the fully mechanized longwall mining face meet the second condition, the top coal block size distribution measurement method is determined to be the scraper plate stacking measurement method; the second condition is that the gas content is within the sixth set range, the top coal thickness is within the seventh set range, the coal seam dip angle is within the eighth set range, the large top coal block size is within the ninth set range, and the space below the tail beam is within the tenth set range.

[0077] When the parameters of the fully mechanized longwall mining face meet the third condition, the top coal block size distribution measurement method is determined to be the distributed measurement method on the scraper; the third condition is that the gas content is within the sixth set range, the top coal thickness is within the second set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the fifth set range.

[0078] Wherein, the minimum value in the first set range is greater than the maximum value in the sixth set range; the minimum value in the second set range is greater than the maximum value in the seventh set range; the minimum value in the third set range is greater than the maximum value in the eighth set range; the minimum value in the fourth set range is greater than the maximum value in the ninth set range; and the maximum value in the fifth set range is less than the minimum value in the tenth set range.

[0079] Example 3

[0080] This invention provides an electronic device including a memory and a processor. The memory stores a computer program, and the processor runs the computer program to enable the electronic device to perform the method for measuring the top coal block size distribution in fully mechanized caving mining as described in Embodiment 1.

[0081] Alternatively, the aforementioned electronic device may be a server.

[0082] In addition, this embodiment of the invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for measuring the top coal block size distribution in fully mechanized caving mining as described in Embodiment 1.

[0083] To address the shortcomings of existing technologies, this invention proposes a method for measuring the distribution law of broken top coal block size in fully mechanized longwall mining faces. The measurement method in this invention can effectively measure the top coal block size on-site, and can largely restore the true state of the top coal release body. The optimal measurement method can be selected according to different geological conditions.

[0084] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0085] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for measuring the top coal lump size distribution in fully mechanized caving mining, characterized in that, include: Obtain parameters of the fully mechanized longwall mining face; the parameters of the fully mechanized longwall mining face include gas content, top coal thickness, coal seam dip angle, number of large top coal blocks, and space below the tail beam; Based on the parameters of the fully mechanized longwall mining face, determine the method for measuring the top coal block size distribution, and determine the measurement results of the top coal block size distribution in fully mechanized longwall mining based on the determined method for measuring the top coal block size distribution. When the parameters of the fully mechanized longwall mining face meet the first condition, the top coal block size distribution measurement method is determined to be the belt conveyor decentralized measurement method; the first condition is that the gas content is within a first set range, the top coal thickness is within a second set range, the coal seam dip angle is within a third set range, the large-block top coal is within a fourth set range, and the space below the tail beam is within a fifth set range. When the parameters of the fully mechanized longwall mining face meet the second condition, the measurement method for the top coal block size distribution is determined to be the scraper plate accumulation measurement method; the second condition is that the gas content is within the sixth set range, the top coal thickness is within the seventh set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the tenth set range. When the parameters of the fully mechanized longwall mining face meet the third condition, the top coal block size distribution measurement method is determined to be the distributed measurement method on the scraper; the third condition is that the gas content is within the sixth set range, the top coal thickness is within the second set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the fifth set range. Wherein, the minimum value in the first set range is greater than the maximum value in the sixth set range; the minimum value in the second set range is greater than the maximum value in the seventh set range; and the minimum value in the third set range is greater than the maximum value in the eighth set range. The minimum value in the fourth set range is greater than the maximum value in the ninth set range; the maximum value in the fifth set range is less than the minimum value in the tenth set range.

2. The method for measuring the top coal block size distribution in fully mechanized caving mining according to claim 1, characterized in that, The method for measuring the top coal block size distribution in fully mechanized caving mining is applied to the top coal block transport device in fully mechanized caving mining; the top coal block transport device in fully mechanized caving mining includes a scraper conveyor, a transfer conveyor, a crusher, a belt conveyor, and a support coal discharge port; The scraper conveyor, the transfer conveyor, the crusher, and the belt conveyor are connected in sequence according to the direction of top coal block transmission; The coal discharge port of the support is located inside the support assembly; the support assembly consists of two rows of parallel supports; each row of supports consists of multiple supports. The scraper conveyor includes a front scraper conveyor and a rear scraper conveyor, with the front scraper conveyor located on one side of a row of supports and the rear scraper conveyor located on one side of another row of supports.

3. The method for measuring the top coal block size distribution in fully mechanized caving mining according to claim 2, characterized in that, The aforementioned belt-mounted distributed measurement method refers to selecting a suitable measurement support for coal discharge operation, keeping the rear scraper conveyor and belt conveyor working, stopping the front scraper conveyor and crusher, and waiting for the top coal block size to be delivered to the belt conveyor by the rear scraper conveyor before shutting down the belt conveyor and starting to measure the block size and quality of the top coal block to obtain the measurement results of the top coal block size distribution in fully mechanized top coal mining.

4. The method for measuring the top coal block size distribution in fully mechanized caving mining according to claim 3, characterized in that, The measurement location corresponding to the distributed measurement method on the belt is the marked area of ​​the belt conveyor; the marked area of ​​the belt conveyor is the part near the goaf.

5. The method for measuring the top coal block size distribution in fully mechanized caving mining according to claim 2, characterized in that, The aforementioned scraper-mounted stacking measurement method refers to stopping the operation of the fully mechanized top coal block transport device, entering the space under the tail beam from the gap between two adjacent supports, selecting a suitable position to measure the block size and quality of the top coal block, and obtaining the measurement results of the block size distribution of the fully mechanized top coal block.

6. The method for measuring the top coal block size distribution in fully mechanized caving mining according to claim 2, characterized in that, The aforementioned decentralized measurement method on the scraper refers to a method in which only the front scraper conveyor and crusher are shut down, while the rest of the equipment of the fully mechanized top coal block transportation device is operating normally. The block size and quality of the top coal block are measured at a suitable position in the space under the tail beam of the support to obtain the measurement results of the block size distribution of the fully mechanized top coal block.

7. A system for measuring the top coal block size distribution in fully mechanized caving mining, characterized in that, include: The data acquisition module is used to acquire parameters of the fully mechanized longwall mining face; the parameters of the fully mechanized longwall mining face include gas content, top coal thickness, coal seam dip angle, number of large top coal blocks, and space below the tail beam; The module for determining the measurement results of top coal block size distribution in fully mechanized caving mining is used to determine the measurement method of top coal block size distribution based on the parameters of the fully mechanized caving mining face, and to determine the measurement results of top coal block size distribution in fully mechanized caving mining based on the determined measurement method of top coal block size distribution. When the parameters of the fully mechanized longwall mining face meet the first condition, the top coal block size distribution measurement method is determined to be the belt conveyor decentralized measurement method; the first condition is that the gas content is within a first set range, the top coal thickness is within a second set range, the coal seam dip angle is within a third set range, the large-block top coal is within a fourth set range, and the space below the tail beam is within a fifth set range. When the parameters of the fully mechanized longwall mining face meet the second condition, the measurement method for the top coal block size distribution is determined to be the scraper plate accumulation measurement method; the second condition is that the gas content is within the sixth set range, the top coal thickness is within the seventh set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the tenth set range. When the parameters of the fully mechanized longwall mining face meet the third condition, the top coal block size distribution measurement method is determined to be the distributed measurement method on the scraper; the third condition is that the gas content is within the sixth set range, the top coal thickness is within the second set range, the coal seam dip angle is within the eighth set range, the large-block top coal is within the ninth set range, and the space below the tail beam is within the fifth set range. Wherein, the minimum value in the first set range is greater than the maximum value in the sixth set range; the minimum value in the second set range is greater than the maximum value in the seventh set range; and the minimum value in the third set range is greater than the maximum value in the eighth set range. The minimum value in the fourth set range is greater than the maximum value in the ninth set range; the maximum value in the fifth set range is less than the minimum value in the tenth set range.

8. An electronic device, characterized in that, The device includes a memory and a processor, the memory being used to store a computer program, and the processor running the computer program to enable the electronic device to perform the method for measuring the top coal block size distribution in fully mechanized caving mining according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the method for measuring the top coal block size distribution in fully mechanized caving mining as described in any one of claims 1 to 6.

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