Coal seam fully mechanized working face coal recovery rate determination method, device, equipment and medium

Abstract

The application relates to the technical field of coal mining, and provides a coal seam fully-mechanized working face coal recovery rate determination method, device, equipment and medium, the method comprises the following steps: determining the roadway arrangement mode of a target coal seam fully-mechanized working face; determining the coal cutting recovery rate of the target coal seam fully-mechanized working face according to the coal cutting height at each tendency fixed point position of the target coal seam fully-mechanized working face, the coal seam thickness at each tendency fixed point position and the corresponding coal cutting recovery rate of the coal seam thickness of the target coal seam fully-mechanized working face; determining the top coal recovery rate of the target coal seam fully-mechanized working face; and determining the coal recovery rate of the target coal seam fully-mechanized working face based on the roadway arrangement mode, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height of the target coal seam fully-mechanized working face, the top coal height, the working face tendency length, the working face average coal seam thickness, coal section width information and working face strike length information. The application can improve the accuracy of determining the coal recovery rate of a coal seam fully-mechanized working face.

Description

Technical Field

[0001] This application relates to the field of coal mining technology, specifically to a method, apparatus, equipment, and medium for determining the coal recovery rate of a fully mechanized longwall face. Background Technology

[0002] Coal recovery rate in fully mechanized longwall mining faces has always been a crucial technical indicator for achieving high-yield, high-efficiency, and high-recovery coal mining. Currently, issues such as roof and floor coal losses due to different roadway layouts, coal seam hardness and fracture development leading to losses in coal release processes, coal release process losses due to the lack of coal release mechanisms on transition supports, and roof coal losses caused by coal release process parameters result in low accuracy in determining the coal recovery rate of fully mechanized longwall mining faces. Summary of the Invention

[0003] This application provides a method, apparatus, equipment, and medium for determining the coal recovery rate of a fully mechanized coal caving face, in order to improve the accuracy of determining the coal recovery rate of a fully mechanized coal caving face.

[0004] In a first aspect, embodiments of this application provide a method for determining the coal recovery rate of a fully mechanized coal seam caving face, including:

[0005] Determine the roadway layout for the target coal seam fully mechanized longwall mining face;

[0006] The coal recovery rate of the target coal seam fully mechanized longwall face is determined based on the coal cutting height at each dip point, the coal seam thickness at each dip point, and the coal recovery rate corresponding to the coal seam thickness of the target coal seam fully mechanized longwall face.

[0007] Determine the top coal recovery rate of the target coal seam fully mechanized longwall face;

[0008] Based on the roadway layout, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, average coal seam thickness, coal section width information, and working face strike length information of the target coal seam fully mechanized longwall face, the coal recovery rate of the target coal seam fully mechanized longwall face is determined.

[0009] In one embodiment, determining the coal recovery rate of the target coal seam fully mechanized longwall face based on the roadway layout, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, the coal release height, the face dip length, the average coal seam thickness, the coal section width information, and the face strike length information includes:

[0010] Determine the stability type of the top triangular coal seam in the target coal seam fully mechanized longwall mining face;

[0011] Based on the stability type of the top triangular coal and the roadway layout, the formula for calculating the coal recovery rate per meter of advance is determined.

[0012] Based on the formula for calculating the coal recovery rate per meter of advance, and combined with the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, average coal seam thickness, and coal section width information of the target coal seam fully mechanized caving face, the coal recovery rate per meter of advance of the target coal seam fully mechanized caving face is determined.

[0013] Based on the coal recovery rate per meter of advance, the working face length information, and the working face length, the coal recovery rate of the target coal seam fully mechanized longwall face is determined.

[0014] In one embodiment, the stability type of the top triangular coal seam includes a first stability type and a second stability type; the roadway layout includes a double roadway along the top, a return air along the top and intake air along the bottom, an intake air along the top and return air along the bottom, and a double roadway along the bottom; the step of determining the coal recovery rate per meter of advance calculation formula based on the stability type of the top triangular coal seam and the roadway layout includes:

[0015] If the stability type of the top triangular coal is the first stability type and the roadway layout is a double roadway along the top, then the formula for calculating the coal recovery rate per meter of advance is as follows:

[0016]

[0017] If the stability type of the top triangular coal is the first stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows:

[0018]

[0019] If the stability type of the top triangular coal is the first stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is the following third formula:

[0020]

[0021] If the stability type of the top triangular coal is the first stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows:

[0022]

[0023] If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the top, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 5:

[0024]

[0025] If the stability type of the top triangular coal is the second stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 6:

[0026]

[0027] If the stability type of the top triangular coal is the second stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 7:

[0028]

[0029] If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 8:

[0030]

[0031] Wherein, M1 represents the coal cutting height; M2 represents the coal release height; M represents the average coal seam thickness of the working face; R1 represents the coal recovery rate; R2 represents the top coal recovery rate; L represents the dip length of the working face; L s L represents the average triangular coal face width in the coal section width information; d L1 represents the average width of the working face end without coal release in the coal section width information; L2 represents the width of the triangular coal seam at the bottom of the intake airway in the coal section width information; L d1 L3 represents the width of the non-coal section at the end of the intake airway in the coal section width information; L3 represents the width of the triangular coal section at the bottom of the return airway in the coal section width information; L d3 This indicates the width of the return airway end where no coal is placed, as stated in the coal section width information.

[0032] In one embodiment, determining the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal recovery rate per meter of advance, the working face length information, and the working face length is achieved using the following ninth formula:

[0033]

[0034] Among them, R nZ represents the coal recovery rate per meter of advancement at the nth meter; n Z represents the length of the working face at the nth meter in the working face direction information; Z represents the working face length.

[0035] In one embodiment, after determining the top coal recovery rate of the target coal seam fully mechanized longwall face, the method further includes:

[0036] Determine the stability type of the top triangular coal seam in the target coal seam fully mechanized longwall mining face;

[0037] Based on the stability type of the top triangular coal seam and the roadway layout, a formula for calculating coal production per meter of advance is determined.

[0038] Based on the formula for calculating coal production per meter of advance, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, coal section width information, and coal seam bulk density of the target coal seam fully mechanized caving face, the coal production per meter of advance of the target coal seam fully mechanized caving face is determined.

[0039] In one embodiment, determining the coal production per meter of advance calculation formula based on the stability type of the top triangular coal seam and the roadway layout includes:

[0040] If the stability type of the top triangular coal seam is the first stability type and the roadway layout is a double-roadway along-the-roof layout, then the formula for calculating the coal production per meter of advance is as follows: Formula 10:

[0041] Q 11 =[M1LR1+M2(LL) s -L d )R2]γ;

[0042] If the stability type of the top triangular coal is the first stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 11:

[0043]

[0044] If the stability type of the top triangular coal is the first stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 12.

[0045]

[0046] If the stability type of the top triangular coal is the first stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 13:

[0047] Q 41 =[M1LR1+M2(L-2L)] d )R2]γ;

[0048] If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the top, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Fourteen.

[0049]

[0050] If the stability type of the top triangular coal is the second stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Fifteen.

[0051]

[0052] If the stability type of the top triangular coal is the second stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Sixteen.

[0053]

[0054] If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Seventeen.

[0055] Q 42 =[M1LR1+M2(L-2L)] d )R2]γ;

[0056] Wherein, M1 represents the coal cutting height; M2 represents the coal release height; R1 represents the coal recovery rate; R2 represents the top coal recovery rate; L represents the working face dip length; L s L represents the average triangular coal face width in the coal section width information; d L1 represents the average width of the working face end without coal release in the coal section width information; L2 represents the width of the triangular coal seam at the bottom of the intake airway in the coal section width information; L d1 L3 represents the width of the non-coal section at the end of the intake airway in the coal section width information; L3 represents the width of the triangular coal section at the bottom of the return airway in the coal section width information; L d3 The width of the return airway end without coal placement is indicated in the coal section width information; γ represents the bulk density of the coal seam.

[0057] In one embodiment, after determining the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal recovery rate per meter of advance, the working face length information, and the working face length, the method further includes:

[0058] Based on the eighteenth formula, the coal recovery rate of the target coal seam fully mechanized longwall face, the coal seam bulk density, the average coal seam thickness of the longwall face, the strike length of the longwall face, and the dip length of the longwall face, the coal recovery output of the target coal seam fully mechanized longwall face is determined.

[0059] The eighteenth formula is as follows:

[0060] Q = LZMγR;

[0061] Wherein, M represents the average coal seam thickness of the working face; L represents the dip length of the working face; γ represents the bulk density of the coal seam; R represents the coal recovery rate of the target coal seam fully mechanized longwall face; and Z represents the strike length of the working face.

[0062] Secondly, embodiments of this application provide a device for determining the coal recovery rate of a fully mechanized coal seam caving face, comprising:

[0063] The first determining module is used to determine the roadway layout of the target coal seam fully mechanized longwall face;

[0064] The second determining module is used to determine the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal cutting height at each dip fixed point position, the coal seam thickness at each dip fixed point position and the coal recovery rate corresponding to the coal seam thickness of the target coal seam fully mechanized longwall face.

[0065] The third determining module is used to determine the top coal recovery rate of the target coal seam fully mechanized longwall face;

[0066] The fourth determining module is used to determine the coal recovery rate of the target coal seam fully mechanized longwall face based on the roadway layout, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, the coal release height, the working face dip length, the average coal seam thickness, the coal section width information, and the working face strike length information.

[0067] Thirdly, embodiments of this application provide a device, which is an electronic device, including a processor and a memory storing a computer program. When the processor executes the program, it implements the method for determining the coal recovery rate of a fully mechanized coal seam mining face as described in the first aspect.

[0068] Fourthly, embodiments of this application provide a medium, which is a computer-readable storage medium including a computer program. When the computer program is executed by a processor, it implements the method for determining the coal recovery rate of a fully mechanized coal seam mining face as described in the first aspect.

[0069] The coal recovery rate determination method, apparatus, equipment, and medium for fully mechanized longwall mining faces provided in this application embodiment, by determining the roadway layout, coal cutting recovery rate, and top coal recovery rate of the target fully mechanized longwall mining face, enables the rapid and accurate determination of the coal recovery rate of the target fully mechanized longwall mining face based on the roadway layout, coal cutting recovery rate, top coal recovery rate, coal cutting height, coal release height, working face dip length, average coal seam thickness, coal section width information, and working face strike length information. This avoids various problems caused by different roadway layouts, coal seam hardness, different degrees of fracture development, coal release process losses due to the lack of a coal release mechanism on the transition support, and coal release process parameters, thereby improving the accuracy of determining the coal recovery rate of fully mechanized longwall mining faces. Attached Figure Description

[0070] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0071] Figure 1 This is a flowchart illustrating the method for determining the coal recovery rate of a fully mechanized longwall face provided in this application embodiment;

[0072] Figure 2 This is a schematic diagram of the working face of the coal recovery rate determination method of fully mechanized coal mining face provided in the embodiments of this application, using a double-roadway roof-side arrangement.

[0073] Figure 3 This is a schematic cross-sectional view of the coal recovery rate determination method for fully mechanized coal mining faces provided in this application, with the return air arranged along the top and the intake air along the bottom.

[0074] Figure 4 This is a schematic cross-sectional view of the coal recovery rate determination method for fully mechanized coal mining faces provided in this application, with the intake air arranged along the top and the return air along the bottom.

[0075] Figure 5 This is a schematic diagram of the working face cross-section of the coal recovery rate determination method for fully mechanized coal mining face provided in the embodiments of this application, using a double-roadway bottom-arrangement method.

[0076] Figure 6This is a schematic diagram of the functional modules of an embodiment of the coal recovery rate determination device for fully mechanized coal mining faces in this application;

[0077] Figure 7 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0078] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0079] In the process of creating this application, the applicant considered the following aspects:

[0080] Both roadways are arranged entirely or partially along the coal seam roof. In fully mechanized longwall faces, there are bottom and top triangular coal seams. The bottom triangular coal seams result in cutting losses, while the top triangular coal seams may experience coal release losses. Especially in soft coal faces, due to roof management requirements, releasing some of the top triangular coal seams can easily cause collapse of the strong coal wall and roof, resulting in an empty roof or inadequate roof connection above the supports, affecting the quality of roof management. Therefore, in actual production, to maintain the stability of the face and roof, technical measures such as reducing or eliminating coal release are often adopted on-site, resulting in top coal release losses. Thus, it is evident that when both roadways are arranged along the coal seam roof, bottom triangular coal losses exist in the longwall face, and top triangular coal losses will also occur in soft coal longwall faces.

[0081] Based on the above considerations, the applicant has proposed various embodiments of this application.

[0082] The following describes in detail the method, apparatus, equipment, and medium for determining the coal recovery rate of a fully mechanized longwall face provided in this application, with reference to specific embodiments.

[0083] Figure 1 This is one of the flowcharts illustrating the method for determining coal recovery rate in a fully mechanized longwall mining face provided in this application. (Refer to...) Figure 1 This application provides a method for determining the coal recovery rate of a fully mechanized longwall mining face, which may include:

[0084] Step S100: Determine the roadway layout for the target coal seam fully mechanized longwall face;

[0085] It should be noted that the execution subject of the coal recovery rate determination method for fully mechanized longwall mining faces provided in this application embodiment can be a computer device, such as a mobile phone, tablet computer, laptop computer, PDA, vehicle-mounted electronic device, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA). In some scenarios, it can also be executed manually.

[0086] The target coal seam is a coal seam that needs to be mined or a coal seam for which the coal recovery rate needs to be calculated before mining. More specifically, it can be a thick coal seam.

[0087] The target coal seam fully mechanized longwall face refers to the fully mechanized longwall face for the target coal seam.

[0088] The roadway layout in this application may include, but is not limited to, four layout methods: double roadway along the top, return air along the top and intake air along the bottom, intake air along the top and return air along the bottom, and double roadway along the bottom.

[0089] The roadway layout can be determined by the roadway layout profile of the fully mechanized longwall face. Specifically, the profile can be identified using artificial intelligence or other methods, which are not limited in this application.

[0090] Figures 2-5 These are schematic cross-sectional views of working faces for the coal recovery rate determination method of fully mechanized longwall mining faces provided in this application, specifically for the following configurations: double-roadway along-roof arrangement, return air along-roof and intake air along-bottom arrangement, intake air along-roof and return air along-bottom arrangement, and double-roadway along-bottom arrangement. Figures 2-5 In the diagram, M1 represents the coal cutting height; M2 represents the coal discharge height; L0 represents the width of the intake airway; L1 represents the width of the triangular coal seam at the bottom of the intake airway; L d1 L1 represents the width of the non-coal-feeding section at the end of the intake airway (generally the width of the 3rd transition frame at the machine head); L2 represents the width of the coal-feeding section in the middle of the working face; L3 represents the width of the triangular coal seam at the bottom of the return airway; L d3 Indicates the width of the section at the end of the return airway where no coal is placed (generally, this is the width of the four transition frames at the tail of the machine where no coal is placed); L s L represents the average width of the triangular coal face. d L represents the average width of the working face without coal discharge; L represents the dip length of the working face; L4 represents the width of the return airway; L5 represents the width of the section coal pillar; R2 represents the top coal recovery rate; M represents the average coal seam thickness of the working face.

[0091] In this application, L1≈L3; L d1 ≈L d2 R1≈100%.

[0092]

[0093]

[0094] In this application, the geological conditions and technical parameters of the fully mechanized longwall mining face in thick coal seams can be obtained in advance.

[0095] The geological conditions and technical parameters for mining in this application may include, but are not limited to, the coal cutting height, top coal thickness, caving support parameters, top coal fissures, release block size, fissure development degree, coal seam hardness, intake airway width, intake airway bottom triangular coal width, intake airway end no-coal-release section width, middle coal release section width, return airway bottom triangular coal width, return airway end no-coal-release section width, average triangular coal width of the working face, average no-coal-release width of the working face end, working face width, return airway width, section coal pillar width, top coal recovery rate, and average coal seam thickness of the working face.

[0096] Step S200: Determine the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal cutting height at each dip point of the target coal seam, the coal seam thickness at each dip point, and the coal recovery rate corresponding to the coal seam thickness of the target coal seam fully mechanized longwall face.

[0097] In the target coal seam fully mechanized longwall face of this application, multiple dip points can be set.

[0098] Furthermore, the cutting height and coal seam thickness at each dip point of the target coal seam fully mechanized longwall face can be obtained.

[0099] The cutting height at each inclined fixed point corresponds to a coal seam thickness at the same inclined fixed point.

[0100] Simultaneously, the coal recovery rate corresponding to the thickness of the target coal seam can also be obtained. It should be noted that this application pre-sets a corresponding coal recovery rate for coal seams of different thicknesses. Specific setting rules can be configured according to actual needs.

[0101] Furthermore, the coal recovery rate of the target coal seam fully mechanized longwall face can be determined using the following formula:

[0102]

[0103] Among them, G n M represents the coal cutting height at the nth inclined fixed point; n This represents the coal seam thickness at the nth dip point. It should be noted that M1 and M2 in the above formula have different meanings than M1 and M2 appearing in other locations in this application; R gThis represents the coal recovery rate; n represents the number of preferred fixed locations.

[0104] Step S300: Determine the top coal recovery rate of the target coal seam fully mechanized longwall face;

[0105] In this application, the fully mechanized caving support parameters, top coal fractures, and caving block size of the target coal seam can also be obtained.

[0106] Furthermore, the top coal recovery rate R2 can be determined by using numerical simulation software, similar simulation experiments, physical simulation experiments, and other methods based on the characteristics of the target coal seam fully mechanized longwall face, such as the coal cutting height, top coal thickness, longwall support parameters, top coal fissures, and release block size.

[0107] It should be noted that this application does not limit the specific process for determining the top coal recovery rate.

[0108] Step S400: Based on the roadway layout, coal recovery rate, top coal recovery rate, coal cutting height, coal release height, working face dip length, average coal seam thickness, coal section width information, and working face strike length information, determine the coal recovery rate of the target coal seam fully mechanized longwall face.

[0109] This application can determine the stability type of the top triangular coal seam in a fully mechanized longwall mining face of a target coal seam.

[0110] Furthermore, based on the stability type of the top triangular coal seam and the roadway layout, a formula for calculating the coal recovery rate per meter of advance is determined.

[0111] Furthermore, based on the formula for calculating the coal recovery rate per meter of advance, and combined with information on the coal cutting recovery rate, top coal recovery rate, coal cutting height, coal release height, working face dip length, average coal seam thickness, and coal section width of the target coal seam fully mechanized longwall face, the coal recovery rate per meter of advance of the target coal seam fully mechanized longwall face is determined.

[0112] The information on coal section width may include, but is not limited to, the width of the intake airway, the width of the triangular coal at the bottom of the intake airway, the width of the section without coal at the end of the intake airway, the width of the coal-releasing section in the middle of the working face, the width of the triangular coal at the bottom of the return airway, the width of the section without coal at the end of the return airway, the average width of the triangular coal at the working face, the average width without coal at the end of the working face, the width of the working face, the width of the return airway, and the width of the coal pillar in the section.

[0113] Furthermore, based on the coal recovery rate per meter, the working face length information, and the working face length, the coal recovery rate of the target coal seam fully mechanized longwall face is determined.

[0114] The method for determining the coal recovery rate of a fully mechanized longwall face provided in this application, by determining the roadway layout, coal cutting recovery rate, and top coal recovery rate of the target fully mechanized longwall face, enables the rapid and accurate determination of the coal recovery rate of the target fully mechanized longwall face based on the roadway layout, coal cutting recovery rate, top coal recovery rate, coal cutting height, coal release height, working face dip length, average coal seam thickness, coal section width information, and working face strike length information. This avoids various problems caused by different roadway layouts, coal seam hardness, different degrees of fracture development, coal release process losses due to the lack of a coal release mechanism on the transition support, and coal release process parameters, thereby improving the accuracy of determining the coal recovery rate of a fully mechanized longwall face.

[0115] In one embodiment, step S400 includes:

[0116] Step S401: Determine the stability type of the top triangular coal seam in the target coal seam fully mechanized longwall face;

[0117] This application can determine the stability type of the top triangular coal of the target coal seam fully mechanized longwall face by combining information such as coal seam hardness, fracture development degree, top coal fracture, vented lump size, top triangular coal thickness and mining impact degree, with one or more judgment rules pre-set based on information such as coal seam hardness, fracture development degree, top coal fracture, vented lump size, top triangular coal thickness and mining impact degree.

[0118] The stability type of the top triangular coal in this application may include a first stability type and a second stability type. The first stability type can be of good stability, and the second stability type can be of poor stability. The criteria for judging good and poor stability can be set according to actual needs and applied to the aforementioned judgment rules.

[0119] Step S402: Determine the calculation formula for coal recovery rate per meter of advance based on the stability type of the top triangular coal and the roadway layout.

[0120] After determining the stability type of the top triangular coal and the roadway layout of the target coal seam fully mechanized longwall face, this application can determine the calculation formula corresponding to the stability type of the top triangular coal and the roadway layout of the target coal seam fully mechanized longwall face from the various calculation formulas for calculating the coal recovery rate per meter of advance corresponding to the two types of top triangular coal stability and the four roadway layouts. This formula can be used as the calculation formula for the coal recovery rate per meter of advance of the target coal seam fully mechanized longwall face.

[0121] Specifically, if the stability type of the top triangular coal is the first stability type and the roadway layout is a double-roadway roof-mounted layout, then the formula for calculating the coal recovery rate per meter of advance is as follows:

[0122]

[0123] If the stability type of the top triangular coal seam is the first stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows:

[0124]

[0125] If the stability type of the top triangular coal seam is the first stability type and the roadway layout is such that the intake air is arranged along the top and the return air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows:

[0126]

[0127] If the stability type of the top triangular coal seam is the first stability type and the roadway layout is a double-roadway bottom-mounted layout, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 4:

[0128]

[0129] If the stability type of the top triangular coal is type two and the roadway layout is a double-roadway roof-mounted layout, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 5:

[0130]

[0131] If the stability type of the top triangular coal seam is the second stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 6:

[0132]

[0133] If the stability type of the top triangular coal seam is the second stability type and the roadway layout is such that the intake air is arranged along the top and the return air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 7:

[0134]

[0135] If the stability type of the top triangular coal seam is the second stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 8:

[0136]

[0137] Where R1 represents the coal cutting recovery rate; R2 represents the top coal recovery rate; the definitions of the remaining parameters are the same as those in the previous section. Figures 2-5 Parameters with the same symbol in Chinese have the same definition.

[0138] In practice, for soft coal working faces with a double-lane roof-mounted layout, due to the need to control the stability of the roof triangular coal face, the amount of coal released from the roof triangular coal face is taken as half of the total release amount. Therefore, under the condition of controlling the stability of the roof triangular coal face, the coal production per meter of advance can be:

[0139]

[0140] For a soft coal working face with a return air arrangement along the top and an intake air arrangement along the bottom, considering the stability of the top triangular coal face, the coal yield per meter of advance can be:

[0141]

[0142] For a soft coal working face with an intake air arrangement along the top and a return air arrangement along the bottom, considering the stability of the top triangular coal face, the coal yield per meter of advance can be:

[0143]

[0144] For the double-roadway bottom-arrangement method, there is no bottom triangular coal or top triangular coal in the fully mechanized longwall face. All the bottom coal in the longwall face can be recovered. The coal recovery rate loss in the fully mechanized longwall face is mainly due to coal release loss.

[0145] Step S403: Based on the formula for calculating the coal recovery rate per meter of advance, and combined with the coal cutting recovery rate, top coal recovery rate, coal cutting height, coal release height, working face dip length, average coal seam thickness, and coal section width information of the target coal seam fully mechanized longwall face, determine the coal recovery rate per meter of advance of the target coal seam fully mechanized longwall face.

[0146] After obtaining the formula for calculating the coal recovery rate per meter of advance, this application can obtain the information corresponding to the parameters required for the formula, including the coal cutting recovery rate, top coal recovery rate, coal cutting height, coal release height, working face dip length, average coal seam thickness, and the information corresponding to the parameters in the coal section width information of the formula for calculating the coal recovery rate per meter of advance. The obtained information is then input into the formula for calculating the coal recovery rate per meter of advance to obtain the coal recovery rate per meter of advance of the target coal seam fully mechanized longwall face output by the formula for calculating the coal recovery rate per meter of advance.

[0147] Step S404: Based on the coal recovery rate per meter of advance, the information on the working face length and the working face length, determine the coal recovery rate of the target coal seam fully mechanized longwall face.

[0148] After obtaining the coal recovery rate per meter of advance, this application can determine the coal recovery rate of the target coal seam fully mechanized longwall face by combining the coal recovery rate per meter of advance, the face strike length information, and the face strike length using the ninth formula.

[0149] The ninth formula can be represented as follows:

[0150]

[0151] Among them, R n Z represents the coal recovery rate per meter of advancement at the nth meter; n Z represents the length of the working face at the nth meter in the working face direction information; Z represents the working face length.

[0152] This embodiment can quickly and accurately determine the coal recovery rate of a target coal seam fully mechanized longwall face by considering factors such as roadway layout, coal cutting recovery rate, top coal recovery rate, coal cutting height, coal release height, working face dip length, average coal seam thickness, coal section width, and working face strike length. This avoids various problems caused by differences in roadway layout, coal seam hardness, fracture development, lack of coal release mechanism in transition supports, and coal release process parameters, thereby improving the accuracy of determining the coal recovery rate of a fully mechanized longwall face.

[0153] In one embodiment, after determining the top coal recovery rate of the target coal seam fully mechanized longwall face, the method further includes:

[0154] Step 501: Determine the stability type of the top triangular coal seam in the target coal seam fully mechanized longwall face;

[0155] The stability type of the top triangular coal in this application may include a first stability type and a second stability type. The first stability type can be of good stability, and the second stability type can be of poor stability. The criteria for judging good and poor stability can be set according to actual needs and applied to the aforementioned judgment rules.

[0156] Step 502: Determine the formula for calculating coal production per meter of advance based on the stability type of the top triangular coal seam and the roadway layout.

[0157] After determining the stability type of the top triangular coal and the roadway layout of the target coal seam fully mechanized longwall face, this application can determine the calculation formula corresponding to the stability type of the top triangular coal and the roadway layout of the target coal seam fully mechanized longwall face from the various calculation formulas for calculating the coal production per meter of advance corresponding to the two types of top triangular coal stability and the four roadway layouts. This formula can be used as the calculation formula for the coal production per meter of advance of the target coal seam fully mechanized longwall face.

[0158] Specifically, if the stability type of the top triangular coal seam is the first stability type and the roadway layout is a double-roadway along the roof, then the formula for calculating the coal yield per meter of advance is as follows: Formula 10:

[0159] Q11 =[M1LR1+M2(LL) s -L d )R2]γ;

[0160] If the stability type of the top triangular coal seam is the first stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 11:

[0161]

[0162] If the stability type of the top triangular coal seam is the first stability type and the roadway layout is such that the intake air is arranged along the top and the return air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 12.

[0163]

[0164] If the stability type of the top triangular coal seam is the first stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 13:

[0165] Q 41 =[M1LR1+M2(L-2L)] d )R2]γ;

[0166] If the stability type of the top triangular coal is type two and the roadway layout is a double-roadway roof-mounted layout, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Fourteen.

[0167]

[0168] If the stability type of the top triangular coal seam is the second stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Fifteen.

[0169]

[0170] If the stability type of the top triangular coal seam is the second stability type and the roadway layout is such that the intake air is along the top and the return air is along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Sixteen.

[0171]

[0172] If the stability type of the top triangular coal seam is the second stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 17.

[0173] Q 42=[M1LR1+M2(L-2L)] d )R2]γ;

[0174] Where R1 represents the coal recovery rate; R2 represents the top coal recovery rate; γ represents the coal seam bulk density; the definitions of the remaining parameters are the same as those in the previous section. Figures 2-5 Parameters with the same symbol in Chinese have the same definition.

[0175] Step 503: Based on the formula for calculating coal production per meter of advance, coal cutting recovery rate, top coal recovery rate, coal cutting height, coal release height, working face dip length, coal section width information and coal seam bulk density of the target coal seam fully mechanized longwall face, determine the coal production per meter of advance of the target coal seam fully mechanized longwall face.

[0176] After obtaining the formula for calculating coal production per meter of advance, this application can obtain the information corresponding to the parameters required for the formula, including coal cutting recovery rate, top coal recovery rate, coal cutting height, coal release height, working face dip length, coal seam bulk density, and the information corresponding to the parameters in the coal section width information of the formula for calculating coal recovery rate per meter of advance. The obtained information is then input into the formula for calculating coal production per meter of advance to obtain the coal production per meter of advance of the target coal seam fully mechanized longwall face output by the formula for calculating coal production per meter of advance.

[0177] Once the coal production per meter of advance of the target coal seam fully mechanized longwall face is obtained, the overall coal production of the target coal seam fully mechanized longwall face can be determined based on the coal production per meter of advance.

[0178] In some embodiments, the coal production per meter of advance of the target coal seam fully mechanized longwall face can be multiplied by the length of the target coal seam fully mechanized longwall face, and the result of the multiplication can be used as the overall coal production of the target coal seam fully mechanized longwall face.

[0179] This embodiment can also quickly and accurately determine the coal production of the target coal seam fully mechanized longwall face, and can effectively guide the coal production of the fully mechanized longwall face.

[0180] Understandably, after determining the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal recovery rate per meter of advance, the face strike length information, and the face strike length, the following is also included:

[0181] Based on the 18th formula, the coal recovery rate of the target coal seam fully mechanized longwall face, the coal seam bulk density, the average coal seam thickness of the longwall face, the strike length of the longwall face, and the dip length of the longwall face, the coal recovery output of the target coal seam fully mechanized longwall face is determined.

[0182] The eighteenth formula is shown below:

[0183] Q = LZMγR;

[0184] Where M represents the average coal seam thickness of the working face; L represents the dip length of the working face; γ represents the coal seam bulk density; R represents the coal recovery rate of the target coal seam fully mechanized longwall face; and Z represents the strike length of the working face.

[0185] This embodiment can quickly and accurately determine the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal recovery rate, coal seam density, average coal seam thickness, strike length, and dip length of the longwall face, which can effectively guide the coal production of the fully mechanized longwall face.

[0186] The method described in this application is simple, easy to operate, fast in calculation, and accurate in results, and can effectively guide the management of coal production and recovery rate in fully mechanized longwall mining faces.

[0187] In some embodiments, when the stability of the top triangular coal is good, the formulas for calculating the yield and recovery rate per meter of the fully mechanized longwall face roadway with double roadways arranged along the roof or floor are shown in Table 1.

[0188] Table 1. Formulas for calculating the yield and recovery rate per meter of advancement in fully mechanized longwall mining face roadways with dual roadways arranged along the roof or floor.

[0189]

[0190]

[0191] When the stability of the top triangular coal is poor, the formulas for calculating the output and recovery rate per meter of the fully mechanized longwall face roadway with double roadways arranged along the roof or floor are shown in Table 2.

[0192] Table 2 Formulas for calculating the yield and recovery rate per meter of advance in fully mechanized mining face roadways arranged along the roof or floor.

[0193]

[0194] For a fully mechanized longwall mining face with a width of 200m, the following are the selected mining parameter values ​​for a sample working face:

[0195] M—Coal seam thickness, 7m; M1—Coal cutting height, 2.8m for conventional fully mechanized longwall mining and 3.5m for high-extraction fully mechanized longwall mining; M2—Coal release height, 4.2m for conventional fully mechanized longwall mining and 3.5m for high-extraction fully mechanized longwall mining; L0—Intake roadway width, 5m; L1—Width of the triangular coal seam at the bottom of the intake roadway, 30m; L d1 —Width of the no-coal-discharge section at the end of the intake airway: 4.5m; L2—Width of the coal-discharge section in the middle of the working face: 189.5m; L3—Width of the triangular coal seam at the bottom of the return airway: 30m; L d3 —Width of the section without coal placement at the end of the return airway: 6m; L s —Average triangular coal face width, 30m; L d—Average width of the working face without coal discharge, 5.25m; L—Working face width, 200m; L4—Return airway width, 5m; L5—Section coal pillar width, 20m. R2, top coal recovery rate, based on PFC particle flow software numerical simulation results, is taken as 82.4% when the coal cutting height is 2.8m and as 84.1% when the coal cutting height is 3.5m.

[0196] In some embodiments, under the condition that the top triangular coal has good stability, the calculated results of the yield per meter of advance and recovery rate of a 200m wide fully mechanized longwall face are shown in Tables 3 and 4:

[0197] Table 3. Calculation results of yield and recovery rate per meter of advance in a fully mechanized longwall mining face with a mining height of 2.8m and a width of 200m.

[0198]

[0199] Table 4. Calculation results of yield and recovery rate per meter of advance in a fully mechanized longwall mining face with a mining height of 3.5m and a width of 200m.

[0200]

[0201] The coal production and recovery rates for the four roadway layouts at a mining height of 2.8m are as follows:

[0202] The coal yield per meter of working face advancing with a double-lane bottom arrangement is 1726t, with a recovery rate of 86.8%; the coal yield per meter of working face advancing with a return air along the top and an intake air along the bottom arrangement is 1693t, with a recovery rate of 85.2%; the coal yield per meter of working face advancing with an intake air along the top and a return air along the bottom arrangement is 1690t, with a recovery rate of 85.0%; and the coal yield per meter of working face advancing with a double-lane top arrangement is 1605t, with a recovery rate of 80.7%.

[0203] The coal production and recovery rates for the four roadway layouts at a mining height of 3.5m are as follows:

[0204] The coal yield per meter of working face advancing with a double-lane bottom arrangement is 1786t, with a recovery rate of 86.8%; the coal yield per meter of working face advancing with a return air along the top and an intake air along the bottom arrangement is 1758t, with a recovery rate of 88.4%; the coal yield per meter of working face advancing with an intake air along the top and a return air along the bottom arrangement is 1755t, with a recovery rate of 88.3%; and the coal yield per meter of working face advancing with a double-lane top arrangement is 1683t, with a recovery rate of 84.6%.

[0205] Under the condition of poor stability of the top triangular coal, the calculated results of the output per meter and recovery rate of a 200m wide fully mechanized longwall face are shown in Tables 5 and 6:

[0206] Table 5. Calculation results of yield and recovery rate per meter of advance in a fully mechanized longwall mining face with a mining height of 2.8m and a width of 200m.

[0207]

[0208] Table 6. Calculation results of yield and recovery rate per meter of advance in a fully mechanized longwall mining face with a mining height of 3.5m and a width of 200m.

[0209]

[0210] The coal production and recovery rates for the four roadway layouts at a mining height of 2.8m are as follows:

[0211] The coal yield per meter of working face advancing with a double-lane bottom arrangement is 1726t, with a recovery rate of 86.8%; the coal yield per meter of working face advancing with a return air along the top and an intake air along the bottom arrangement is 1662t, with a recovery rate of 83.6%; the coal yield per meter of working face advancing with an intake air along the top and a return air along the bottom arrangement is 1660t, with a recovery rate of 83.5%; and the coal yield per meter of working face advancing with a double-lane top arrangement is 1544t, with a recovery rate of 77.7%.

[0212] The coal production and recovery rates for the four roadway layouts at a mining height of 3.5m are as follows:

[0213] The coal yield per meter of working face advancing with a double-lane bottom arrangement is 1786t, with a recovery rate of 89.8%; the coal yield per meter of working face advancing with a return air along the top and an intake air along the bottom arrangement is 1731t, with a recovery rate of 87.1%; the coal yield per meter of working face advancing with an intake air along the top and a return air along the bottom arrangement is 1730t, with a recovery rate of 87.0%; and the coal yield per meter of working face advancing with a double-lane top arrangement is 1631t, with a recovery rate of 82.0%.

[0214] Furthermore, this application also provides a device for determining the coal recovery rate of a fully mechanized coal mining face.

[0215] Reference Figure 6 , Figure 6 This is a schematic diagram of the functional modules of an embodiment of the coal recovery rate determination device for fully mechanized coal mining faces in this application.

[0216] The coal recovery rate determination device for fully mechanized longwall mining faces includes:

[0217] The first determining module 610 is used to determine the roadway layout of the target coal seam fully mechanized longwall face;

[0218] The second determining module 620 is used to determine the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal cutting height at each dip fixed point position, the coal seam thickness at each dip fixed point position and the coal recovery rate corresponding to the coal seam thickness of the target coal seam fully mechanized longwall face.

[0219] The third determining module 630 is used to determine the top coal recovery rate of the target coal seam fully mechanized longwall face;

[0220] The fourth determining module 640 is used to determine the coal recovery rate of the target coal seam fully mechanized longwall face based on the roadway layout, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, the coal release height, the working face dip length, the average coal seam thickness, the coal section width information, and the working face strike length information of the target coal seam fully mechanized longwall face.

[0221] In one embodiment, the fourth determining module 640 is specifically used for:

[0222] Determine the stability type of the top triangular coal seam in the target coal seam fully mechanized longwall mining face;

[0223] Based on the stability type of the top triangular coal and the roadway layout, the formula for calculating the coal recovery rate per meter of advance is determined.

[0224] Based on the formula for calculating the coal recovery rate per meter of advance, and combined with the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, average coal seam thickness, and coal section width information of the target coal seam fully mechanized caving face, the coal recovery rate per meter of advance of the target coal seam fully mechanized caving face is determined.

[0225] Based on the coal recovery rate per meter of advance, the working face length information, and the working face length, the coal recovery rate of the target coal seam fully mechanized longwall face is determined.

[0226] In one embodiment, the fourth determining module 640 includes a first determining unit, the first determining unit being configured to:

[0227] Based on the nineteenth formula, the coal recovery rate of the target coal seam fully mechanized longwall face, the coal seam bulk density, the average coal seam thickness of the longwall face, the strike length of the longwall face, and the dip length of the longwall face, the coal recovery output of the target coal seam fully mechanized longwall face is determined.

[0228] The nineteenth formula is as follows:

[0229] Q = LZMγR;

[0230] Wherein, M represents the average coal seam thickness of the working face; L represents the dip length of the working face; γ represents the bulk density of the coal seam; R represents the coal recovery rate of the target coal seam fully mechanized longwall face; and Z represents the strike length of the working face.

[0231] In one embodiment, the fourth determining module 640 includes a second determining unit, the second determining unit being used for:

[0232] If the stability type of the top triangular coal is the first stability type and the roadway layout is a double roadway along the top, then the formula for calculating the coal recovery rate per meter of advance is as follows:

[0233]

[0234] If the stability type of the top triangular coal is the first stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows:

[0235]

[0236] If the stability type of the top triangular coal is the first stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is the following third formula:

[0237]

[0238] If the stability type of the top triangular coal is the first stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows:

[0239]

[0240] If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the top, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 5:

[0241]

[0242] If the stability type of the top triangular coal is the second stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 6:

[0243]

[0244] If the stability type of the top triangular coal is the second stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 7:

[0245]

[0246] If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 8:

[0247]

[0248] Wherein, M1 represents the coal cutting height; M2 represents the coal release height; M represents the average coal seam thickness of the working face; R1 represents the coal recovery rate; R2 represents the top coal recovery rate; L represents the dip length of the working face; L s L represents the average triangular coal face width in the coal section width information; d L1 represents the average width of the working face end without coal release in the coal section width information; L2 represents the width of the triangular coal seam at the bottom of the intake airway in the coal section width information; L d1 L3 represents the width of the non-coal section at the end of the intake airway in the coal section width information; L3 represents the width of the triangular coal section at the bottom of the return airway in the coal section width information; L d3 This indicates the width of the return airway end where no coal is placed, as stated in the coal section width information.

[0249] In one embodiment, the fourth determining module 640 is further configured to:

[0250] Determine the stability type of the top triangular coal seam in the target coal seam fully mechanized longwall mining face;

[0251] Based on the stability type of the top triangular coal seam and the roadway layout, a formula for calculating coal production per meter of advance is determined.

[0252] Based on the formula for calculating coal production per meter of advance, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, coal section width information, and coal seam bulk density of the target coal seam fully mechanized caving face, the coal production per meter of advance of the target coal seam fully mechanized caving face is determined.

[0253] In one embodiment, the fourth determining module 640 includes a third determining unit, the third determining unit being used for:

[0254] If the stability type of the top triangular coal seam is the first stability type and the roadway layout is a double-roadway along-the-top layout, then the formula for calculating the coal production per meter of advance is as follows: Formula 11:

[0255] Q 11 =[M1LR1+M2(LL) s -L d )R2]γ;

[0256] If the stability type of the top triangular coal is the first stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 12.

[0257]

[0258] If the stability type of the top triangular coal is the first stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 13

[0259]

[0260] If the stability type of the top triangular coal is the first stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Fourteen.

[0261] Q 41 =[M1LR1+M2(L-2L)] d )R2]γ;

[0262] If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the top, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Fifteen.

[0263]

[0264] If the stability type of the top triangular coal is the second stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Sixteen.

[0265]

[0266] If the stability type of the top triangular coal is the second stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula Seventeen.

[0267]

[0268] If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is the following eighteenth formula:

[0269] Q 42 =[M1LR1+M2(L-2L)] d )R2]γ;

[0270] Wherein, M1 represents the coal cutting height; M2 represents the coal release height; R1 represents the coal recovery rate; R2 represents the top coal recovery rate; L represents the working face dip length; L s L represents the average triangular coal face width in the coal section width information; d L1 represents the average width of the working face end without coal release in the coal section width information; L2 represents the width of the triangular coal seam at the bottom of the intake airway in the coal section width information; L d1 L3 represents the width of the non-coal section at the end of the intake airway in the coal section width information; L3 represents the width of the triangular coal section at the bottom of the return airway in the coal section width information; L d3 The width of the return airway end without coal placement is indicated in the coal section width information; γ represents the bulk density of the coal seam.

[0271] Figure 7 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 7 As shown, the electronic device may include: a processor 710, a communication interface 720, a memory 730, and a communication bus 740, wherein the processor 710, the communication interface 720, and the memory 730 communicate with each other via the communication bus 740. The processor 710 can call a computer program in the memory 730 to execute the steps of a method for determining the coal recovery rate of a fully mechanized coal seam longwall face, such as including:

[0272] Determine the roadway layout for the target coal seam fully mechanized longwall mining face;

[0273] The coal recovery rate of the target coal seam fully mechanized longwall face is determined based on the coal cutting height at each dip point, the coal seam thickness at each dip point, and the coal recovery rate corresponding to the coal seam thickness of the target coal seam fully mechanized longwall face.

[0274] Determine the top coal recovery rate of the target coal seam fully mechanized longwall face;

[0275] Based on the roadway layout, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, average coal seam thickness, coal section width information, and working face strike length information of the target coal seam fully mechanized longwall face, the coal recovery rate of the target coal seam fully mechanized longwall face is determined.

[0276] Furthermore, the logical instructions in the aforementioned memory 730 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0277] On the other hand, embodiments of this application also provide a storage medium, which is a computer-readable storage medium storing a computer program. The computer program is used to cause a processor to execute the steps of the methods provided in the above embodiments, including, for example:

[0278] Determine the roadway layout for the target coal seam fully mechanized longwall mining face;

[0279] The coal recovery rate of the target coal seam fully mechanized longwall face is determined based on the coal cutting height at each dip point, the coal seam thickness at each dip point, and the coal recovery rate corresponding to the coal seam thickness of the target coal seam fully mechanized longwall face.

[0280] Determine the top coal recovery rate of the target coal seam fully mechanized longwall face;

[0281] Based on the roadway layout, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, average coal seam thickness, coal section width information, and working face strike length information of the target coal seam fully mechanized longwall face, the coal recovery rate of the target coal seam fully mechanized longwall face is determined.

[0282] The computer-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to magnetic storage (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO)), optical storage (e.g., CD, DVD, BD, HVD), and semiconductor storage (e.g., ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)).

[0283] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0284] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0285] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for determining the coal recovery rate in a fully mechanized longwall mining face, characterized in that, include: Determine the roadway layout for the target coal seam fully mechanized longwall mining face; The coal recovery rate of the target coal seam fully mechanized longwall face is determined based on the coal cutting height at each dip point, the coal seam thickness at each dip point, and the coal recovery rate corresponding to the coal seam thickness of the target coal seam fully mechanized longwall face. Determine the top coal recovery rate of the target coal seam fully mechanized longwall face; Based on the roadway layout, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, average coal seam thickness, coal section width information, and working face strike length information of the target coal seam fully mechanized longwall face, the coal recovery rate of the target coal seam fully mechanized longwall face is determined. The determination of the coal recovery rate of the target coal seam fully mechanized longwall face based on the roadway layout, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, the coal release height, the face dip length, the average coal seam thickness, the coal section width information, and the face strike length information includes: Determine the stability type of the top triangular coal seam in the target coal seam fully mechanized longwall mining face; Based on the stability type of the top triangular coal and the roadway layout, the formula for calculating the coal recovery rate per meter of advance is determined. Based on the formula for calculating the coal recovery rate per meter of advance, and combined with the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, average coal seam thickness, and coal section width information of the target coal seam fully mechanized caving face, the coal recovery rate per meter of advance of the target coal seam fully mechanized caving face is determined. Based on the coal recovery rate per meter of advance, the working face length information, and the working face length, the coal recovery rate of the target coal seam fully mechanized longwall face is determined; The stability types of the top triangular coal include a first stability type and a second stability type; the roadway layout includes a double roadway along the top, a return air along the top and an intake air along the bottom, an intake air along the top and a return air along the bottom, and a double roadway along the bottom; the formula for determining the coal recovery rate per meter of advance based on the stability types of the top triangular coal and the roadway layout includes: If the stability type of the top triangular coal is the first stability type and the roadway layout is a double roadway along the top, then the formula for calculating the coal recovery rate per meter of advance is as follows: ； If the stability type of the top triangular coal is the first stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: ； If the stability type of the top triangular coal is the first stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is the following third formula: ； If the stability type of the top triangular coal is the first stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: ； If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the top, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 5: ； If the stability type of the top triangular coal is the second stability type and the roadway layout is a return air along the top and an intake air along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 6: ； If the stability type of the top triangular coal is the second stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 7: ； If the stability type of the top triangular coal is the second stability type and the roadway layout is a double roadway along the bottom, then the formula for calculating the coal recovery rate per meter of advance is as follows: Formula 8: ； Wherein, M1 represents the coal cutting height; M2 represents the coal release height; M represents the average coal seam thickness of the working face; r1 represents the coal recovery rate; r2 represents the top coal recovery rate; L represents the dip length of the working face; L s L represents the average triangular coal face width in the coal section width information; d L1 represents the average width of the working face end without coal discharge in the coal section width information; L2 represents the width of the triangular coal seam at the bottom of the intake airway in the coal section width information; L d1 L3 represents the width of the non-coal section at the end of the intake airway in the coal section width information; L3 represents the width of the triangular coal section at the bottom of the return airway in the coal section width information; L d3 This indicates the width of the section where no coal is placed at the end of the return airway in the coal section width information.

2. The method for determining the coal recovery rate of a fully mechanized longwall face according to claim 1, characterized in that, The determination of the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal recovery rate per meter of advance, the working face length information, and the working face length is achieved using the following ninth formula: ； Among them, R n Z represents the coal recovery rate per meter of advancement at the nth meter; n Z represents the length of the working face at the nth meter in the working face direction information; Z represents the working face length.

3. The method for determining the coal recovery rate of a fully mechanized longwall face according to claim 1, characterized in that, After determining the top coal recovery rate of the target coal seam fully mechanized longwall face, the method further includes: Determine the stability type of the top triangular coal seam in the target coal seam fully mechanized longwall mining face; Based on the stability type of the top triangular coal seam and the roadway layout, a formula for calculating coal production per meter of advance is determined. Based on the formula for calculating coal production per meter of advance, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, coal release height, working face dip length, coal section width information, and coal seam bulk density of the target coal seam fully mechanized caving face, the coal production per meter of advance of the target coal seam fully mechanized caving face is determined.

4. The method for determining the coal recovery rate of a fully mechanized longwall face according to claim 3, characterized in that, The formula for calculating coal production per meter of advance, based on the stability type of the top triangular coal seam and the roadway layout, includes: If the stability type of the top triangular coal seam is the first stability type and the roadway layout is a double-roadway along-the-roof layout, then the formula for calculating the coal production per meter of advance is as follows: Formula 10: ； If the stability type of the top triangular coal seam is the first stability type and the roadway layout is a return air along the top and an intake air along the bottom layout, then the formula for calculating the coal production per meter of advance is as follows: Formula 11: ； If the stability type of the top triangular coal seam is the first stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal yield per meter of advance is as follows: Formula 12. ； If the stability type of the top triangular coal seam is the first stability type and the roadway layout is a double-roadway bottom-mounted layout, then the formula for calculating the coal yield per meter of advance is as follows: Formula 13: ； If the stability type of the top triangular coal seam is the second stability type and the roadway layout is a double-roadway along-the-top layout, then the formula for calculating the coal production per meter of advance is as follows: Formula Fourteen. ； If the stability type of the top triangular coal seam is the second stability type and the roadway layout is a return air along the top and an intake air along the bottom layout, then the formula for calculating the coal production per meter of advance is as follows: Formula Fifteen. ； If the stability type of the top triangular coal seam is the second stability type and the roadway layout is an intake airway along the top and a return airway along the bottom, then the formula for calculating the coal production per meter of advance is as follows: Formula Sixteen. ； If the stability type of the top triangular coal seam is the second stability type and the roadway layout is a double-roadway bottom-mounted layout, then the formula for calculating the coal yield per meter of advance is as follows: Formula Seventeen. ； Wherein, γ represents the bulk density of the coal seam.

5. The method for determining the coal recovery rate of a fully mechanized longwall face according to claim 4, characterized in that, After determining the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal recovery rate per meter of advance, the working face length information, and the working face length, the method further includes: Based on the eighteenth formula, the coal recovery rate of the target coal seam fully mechanized longwall face, the coal seam bulk density, the average coal seam thickness of the longwall face, the strike length of the longwall face, and the dip length of the longwall face, the coal recovery output of the target coal seam fully mechanized longwall face is determined. The eighteenth formula is as follows: ； Wherein, R represents the coal recovery rate of the target coal seam fully mechanized longwall face; Z represents the strike length of the longwall face.

6. A device for determining the coal recovery rate in a fully mechanized longwall mining face, characterized in that, The apparatus is used to implement the method for determining the coal recovery rate of a fully mechanized coal seam caving face according to any one of claims 1 to 5, and the apparatus comprises: The first determining module is used to determine the roadway layout of the target coal seam fully mechanized longwall face; The second determining module is used to determine the coal recovery rate of the target coal seam fully mechanized longwall face based on the coal cutting height at each dip fixed point position, the coal seam thickness at each dip fixed point position and the coal recovery rate corresponding to the coal seam thickness of the target coal seam fully mechanized longwall face. The third determining module is used to determine the top coal recovery rate of the target coal seam fully mechanized longwall face; The fourth determining module is used to determine the coal recovery rate of the target coal seam fully mechanized longwall face based on the roadway layout, the coal cutting recovery rate, the top coal recovery rate, the coal cutting height, the coal release height, the working face dip length, the average coal seam thickness, the coal section width information, and the working face strike length information.

7. A device, said device being an electronic device, comprising a processor and a memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method for determining the coal recovery rate of a fully mechanized coal mining face as described in any one of claims 1 to 5.

8. A medium, said medium being a computer-readable storage medium, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for determining the coal recovery rate of a fully mechanized coal mining face as described in any one of claims 1 to 5.

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