Method for Determining Bench Height of Dragline Stripping Operation in Open-Pit Mine

Abstract

The present invention provides a method for determining the height of a stripping shovel dumping operation platform in an open-pit mine, which includes: establishing a first relationship model according to a preset relationship model between the height of the stripping shovel dumping operation platform and the cross-sectional area of the stripping shovel operation unit; fitting the historical muckpile curves at different throw blasting bench heights obtained in the open-pit mine dumping operation to obtain a second relationship model, in which different throw blasting bench heights correspond to different fitting constants; substituting the second relationship model into the first relationship model to obtain a third relationship model; substituting the raw coal production capacity of each mining belt in the open-pit mine and the average thickness of the stripping shovel mining belt into the third relationship model to determine the height of the stripping shovel dumping operation platform. The present invention solves the technical problem of low operation efficiency caused by the inability to determine the height of the stripping shovel dumping operation platform in the prior art. By using the method provided by the present invention, the operation efficiency of the stripping shovel dumping operation is significantly improved.

Description

Technical Field

[0001] The present invention relates to the field of coal mines, and particularly to a method for determining the height of a stripping shovel dumping operation platform in an open-pit mine. Background Art

[0002] The formation process of an open-pit mine: strip the overburden and surrounding rock covering the upper part and around the ore body, transport the waste rock to the waste dump, and directly mine the ore from the exposed ore body. The basic operation process of the current stripping shovel dumping process is as follows: after the rock 40 to 50 meters high above the coal seam roof is thrown by blasting, a muck pile is formed at the working face, a standing bench (platform) is formed on the muck pile, and then the materials stripped from the upper layer of the muck pile are discharged to the edge of the working face to form a secondary standing bench. Finally, the stripping shovel is used for dumping, and the materials are discharged to the waste dump.

[0003] The dumping operation in an open-pit mine is a mining process that, when the overburden of the coal seam is not thick and is horizontal or nearly horizontal, and under the condition that the linear dimension of the mining equipment permits, uses the method of pushing backward to the internal waste dump. Dumping is independently completed by a special dumping equipment (such as a stripping shovel) for various operations such as excavating, transporting, and discharging materials, without the need to separately configure transportation and discharging equipment in the entire process system.

[0004] However, in the prior art, affected by complex geological conditions, the engineering environment for the stripping shovel operation is damaged, resulting in a large change in the actual operation workload of the stripping shovel in the area before and after the fault, affecting the operation efficiency of the stripping shovel, and further affecting the continuous production of raw coal. There is an urgent need for a method for determining the height of the stripping shovel dumping operation platform in an open-pit mine to improve the operation efficiency of the stripping shovel. Summary of the Invention

[0005] Based on the above problems, the present invention proposes a method for determining the height of a stripping shovel dumping operation platform in an open-pit mine, which solves the technical problem of low operation efficiency caused by the inability to determine the height of the stripping shovel dumping operation platform in the prior art. By using the method for determining the height of the stripping shovel dumping operation platform provided by the present invention, the operation efficiency of the stripping shovel is significantly improved.

[0006] The present invention proposes a method for determining the height of a stripping shovel dumping operation platform in an open-pit mine, including:

[0007] Establish a first relationship model according to the preset relationship model between the height of the stripping shovel dumping operation platform and the cross-sectional area of the stripping shovel operation unit. The first relationship model is the relationship model between the height of the stripping shovel dumping operation platform and the raw coal production capacity of the open-pit mine;

[0008] The historical muckpile curves at different throwing blasting bench heights in the open-pit mine backhoe operation are fitted to obtain the second relationship model. In the second relationship model, different throwing blasting bench heights correspond to different fitting constants. The second relationship model is the relationship model between the backhoe operation bench height and the backhoe operation volume;

[0009] Substitute the second relationship model into the first relationship model to obtain the third relationship model. The third relationship model is the relationship model between the backhoe operation bench height, the raw coal production capacity of the open-pit mine, and the average thickness of the backhoe excavation zone under the throwing blasting bench height;

[0010] Substitute the raw coal production capacity of each excavation zone in the open-pit mine and the average thickness of the backhoe excavation zone into the third relationship model to determine the backhoe operation bench height.

[0011] In addition, the preset relationship model formula is:

[0012] g(H 站 ) = S2 + S3,

[0013] where H 站 represents the backhoe operation bench height;

[0014] g(H 站 ) represents the dependent function related to the backhoe operation bench height;

[0015] S2 represents the unit cross-sectional area of the backhoe bench and the corresponding coal trench in the backhoe operation;

[0016] S3 represents the unit cross-sectional area of the backhoe bench ahead of the trench during the backhoe operation.

[0017] In addition, the annual operation volume M 拉 during the backhoe operation is calculated as follows:

[0018]

[0019] Substitute the preset relationship model g(H 站 ) = S2 + 3 into the calculation formula of the annual operation volume M 拉 to obtain the calculation formula of M 煤 as follows:

[0020] Thus, the first relationship model is obtained as:

[0021]

[0022] where M 拉 represents the annual operation volume during the backhoe operation;

[0023] l 煤Denote the length of the stripping area of the dragline in the open-pit mine;

[0024] H 煤 Denote the average thickness of the stripping area of the dragline in the open-pit mine;

[0025] γ denotes the bulk density of raw coal in the open-pit mine;

[0026] b denotes the blasting width of the stripping area in the open-pit mine;

[0027] M 煤 Denote the raw coal production capacity of the open-pit mine;

[0028] l 倒 Denote the length of the working line of the bench operation for throw blasting.

[0029] In addition, for M 拉 the derivation process of the calculation formula is as follows:

[0030]

[0031] We get:

[0032]

[0033] Among them, T′ denotes the annual advance of the stripping area in the open-pit mine;

[0034] S = S1 + S2 + S3; S denotes the total cross-sectional area of the operation section of the dragline casting system;

[0035] S1 denotes the cross-sectional area of the upper stratified operation area for casting;

[0036] (S2 + S3) denotes the cross-sectional area of the lower stratified operation area for casting;

[0037] M 倒 = M 单斗 + M 拉 M 倒 denotes the annual operation volume of the dragline casting system in the open-pit mine;

[0038] So:

[0039] The calculation formula for the annual operation volume M 单斗 of the shovel-truck is as follows:

[0040]

[0041] The calculation formula for the annual operation volume M 拉 during the dragline casting operation is as follows:

[0042]

[0043] In addition, the second relational model is:

[0044]

[0045] Among them, δ1, δ2, and δ3 are fitting constants obtained by fitting according to the historical muckpile curve at the height of the throw blasting bench in the open-pit mine backhoe operation;

[0046] The historical muckpile curve is drawn based on the height of the dragline backhoe operation platform, the cross-sectional area of the dragline operation, the cross-sectional area of the secondary backhoe operation, and the cross-sectional area of the shovel-truck operation.

[0047] In addition, according to M 煤 and g(H 站 ), the third relational model is obtained:

[0048]

[0049]

[0050] The third relational model obtained according to the above two formulas is:

[0051]

[0052] Among them, the values of δ1, δ2, and δ3 are different at different heights of the throw blasting bench.

[0053] In addition, when the height of the throw blasting bench is 40m, δ1 = -6.3929, δ2 = 257.39, δ3 = 178.36; the second relational model is:

[0054]

[0055] The corresponding third relational model is:

[0056]

[0057] In addition, when the height of the throw blasting bench is 45m, δ1 = 0.9405, δ2 = 129.56, δ3 = 708.93;

[0058] The second relational model is:

[0059]

[0060] The corresponding third relational model is:

[0061]

[0062] In addition, when the height of the throw blasting bench is 50m, δ1 = 0.9405, δ2 = 129.56, δ3 = 708.93;

[0063] The second relational model is:

[0064]

[0065] The corresponding third relational model is as follows:

[0066]

[0067] In addition, it also includes: optimizing the height of the dragline stripping operation platform in the complex address area according to the calculated height of the dragline stripping operation platform.

[0068] The present invention solves the technical problem of low operation efficiency caused by the inability to determine the height of the dragline stripping operation platform in the prior art. By using the method for determining the height of the dragline stripping operation platform in an open-pit mine provided by the present invention, the operation efficiency of the dragline stripping operation is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 is a flowchart of the method for determining the height of the dragline stripping operation platform in an open-pit mine provided by an embodiment of the present invention;

[0070] Figure 2 is a sectional view of each operation area of the open-pit mine stripping operation provided by an embodiment of the present invention;

[0071] Figure 3 is a fitting curve under the condition that the height of the throw blasting bench is 40 meters provided by an embodiment of the present invention;

[0072] Figure 4 is a fitting curve under the condition that the height of the throw blasting bench is 45 meters provided by an embodiment of the present invention;

[0073] Figure 5 is a fitting curve under the condition that the height of the throw blasting bench is 50 meters provided by an embodiment of the present invention;

[0074] Figure 6 is a schematic diagram of the model of the third relational model provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0075] The following further describes the present invention in detail in combination with specific implementation schemes and drawings. It only intends to elaborate on the specific implementation schemes of the present invention and does not impose any limitations on the present invention. The protection scope of the present invention shall be subject to the claims.

[0076] Referring to Figure 1 , the present invention provides a method for determining the height of the dragline stripping operation platform in an open-pit mine, including:

[0077] Step S001: Establish a first relationship model according to the preset relationship model between the height of the dragline stripping operation platform and the cross-sectional area of the dragline operation unit. The first relationship model is the relationship model between the height of the dragline stripping operation platform and the raw coal production capacity of the open-pit mine.

[0078] Step S002: Fit the historical muckpile curves at different throw blasting bench heights in the open-pit mine stripping operation to obtain a second relationship model. In the second relationship model, different throw blasting bench heights correspond to different fitting constants. The second relationship model is the relationship model between the height of the dragline stripping operation platform and the dragline operation volume.

[0079] Step S003: Substitute the second relationship model into the first relationship model to obtain a third relationship model. The third relationship model is the relationship model between the height of the dragline stripping operation platform at the throw blasting bench height, the raw coal production capacity of the open-pit mine, and the average thickness of the dragline excavation zone.

[0080] Step S004: Substitute the raw coal production capacity of each excavation zone in the open-pit mine and the average thickness of the dragline excavation zone into the third relationship model to determine the height of the dragline stripping operation platform.

[0081] The cross-sectional area of the dragline operation unit in Step S001 includes: the cross-sectional area of the dragline platform and the corresponding coal groove in the dragline stripping operation, and the cross-sectional area of the dragline platform leading trench.

[0082] In this embodiment, the height of the dragline stripping operation platform refers to the horizontal height of the dragline standing bench during the open-pit mine exploitation.

[0083] As Figure 2 shown, during the dragline stripping operation in the open-pit mine, there are three operation links in total: the upper layer of the muckpile, the dragline standing bench and the coal groove, and the operation of the dragline standing bench leading trench. The cross-sectional areas of the operation areas in each operation link are different. Among them, the cross-sectional area S2 of the dragline platform and the corresponding coal groove in the stripping operation and the cross-sectional area S3 of the dragline platform leading trench during the dragline stripping operation are related to the height of the dragline standing bench.

[0084] In Step S002, the historical muckpile curves at different throw blasting bench heights in the open-pit mine stripping operation are realized by fitting the following table data. Each parameter in the table is: the dragline standing horizontal height (i.e., the height of the dragline stripping operation platform), the dragline operation cross-sectional area (i.e., the cross-sectional area S2 of the dragline platform and the corresponding coal groove in the stripping operation), and the secondary stripping operation cross-sectional area (i.e., the cross-sectional area S3 of the dragline platform leading trench during the dragline stripping operation).

[0085] Table 1 shows the dragline standing horizontal height and the operation volume of each process under the condition of the throw blasting bench height of 40m.

[0086]

[0087]

[0088] Table 1

[0089] Table 2 shows the standing horizontal height of the dragline and the operation volume of each process under the condition that the height of the cast blasting bench is 45 m.

[0090]

[0091] Table 2

[0092] Table 3 shows the standing horizontal height of the dragline and the operation volume of each process under the condition that the height of the cast blasting bench is 50 m.

[0093]

[0094] Table 3

[0095] In step S003, the second relational model is brought into the first relational model to obtain the third relational model. The third relational model is the relational model between the height of the dragline casting and piling operation platform under the height of the cast blasting bench, the raw coal production capacity of the open-pit mine, and the average thickness of the dragline mining belt.

[0096] The second relational model is, for example:

[0097]

[0098] In step S004, the raw coal production capacity of each mining belt in the open-pit mine and the average thickness of the dragline mining belt are brought into the third relational model to determine the height of the dragline casting and piling operation platform.

[0099] This embodiment solves the technical problem of low operation efficiency caused by the inability to determine the height of the dragline casting and piling operation platform in the prior art. By using the method for determining the height of the dragline casting and piling operation platform in the open-pit mine provided in this embodiment, the operation efficiency of the dragline casting and piling is significantly improved.

[0100] In one of the embodiments, the preset relational model formula is:

[0101] g(H 站 ) = S2 + S3……………………………………(1)

[0102] Among them, H 站 represents the height of the dragline casting and piling operation platform;

[0103] g(H 站 ) represents the dependent function related to the height of the dragline casting and piling operation platform;

[0104] S2 represents the unit cross-sectional area of the dragline platform and the corresponding coal groove during the backhoe operation;

[0105] S3 represents the unit cross-sectional area of the dragline platform leading the ditch during the dragline backhoe operation.

[0106] In one of the embodiments, the annual operation volume M 拉 during the dragline backhoe operation has the following calculation formula:

[0107]

[0108] Substitute the preset relationship model g(H 站 ) = S2 + S3 into the calculation formula of the annual operation volume M 拉 to obtain the calculation formula of M 煤 as follows:

[0109] Thus, the first relationship model is obtained as:

[0110]

[0111] where M 拉 represents the annual operation volume during the dragline backhoe operation;

[0112] l 煤 represents the length of the dragline excavation zone in the open-pit mine;

[0113] H 煤 represents the average thickness of the dragline excavation zone in the open-pit mine;

[0114] γ represents the bulk density of raw coal in the open-pit mine;

[0115] b represents the blasting width of the excavation zone in the open-pit mine;

[0116] M 煤 represents the raw coal production capacity of the open-pit mine;

[0117] l 倒 represents the working line length of the throw blasting bench operation.

[0118] In one of the embodiments, the derivation process of the calculation formula of M 拉 is as follows:

[0119]

[0120] Obtain:

[0121]

[0122] where T′ represents the annual advance of the excavation zone in the open-pit mine;

[0123] S = S1 + S2 + S3; S represents the total cross-sectional area of the stripping shovel backhoe system operation section.

[0124] S1 represents the cross-sectional area of the upper backhoe operation area.

[0125] (S2 + 3) represents the cross-sectional area of the lower backhoe operation area.

[0126] M 倒 = M 单斗 + M 拉 ,M 倒 represents the annual operation volume of the open-pit mine backhoe system.

[0127] Therefore:

[0128] The calculation formula for the annual operation volume M of the single-bucket truck is as follows: 单斗 is as follows:

[0129]

[0130] The annual operation volume M during the stripping shovel backhoe operation is as follows: 拉 is as follows:

[0131]

[0132] In this embodiment, the backhoe and coal mining face of the open-pit mine adopt a tracking type mining layout, and the advancement of the backhoe and the coal mining working line is kept consistent. As shown in formula (5), where T'represents the annual advancement of the open-pit mine excavation belt, with the unit of meters per year (m / year);

[0133] S = S1 + S2 + S3; represents the total cross-sectional area of the stripping shovel backhoe system operation section, with the unit of square meters (m 2 ); S1 represents the cross-sectional area of the upper backhoe operation area, with the unit of square meters (m 2 ); (S2 + 3) represents the cross-sectional area of the lower backhoe operation area, with the unit of square meters (m 2 );

[0134] M 倒 = M 单斗 + M 拉 , represents the annual operation volume of the open-pit mine backhoe system, with the unit of cubic meters (m 3 ).

[0135] In this embodiment, there are two operation processes in the open-pit mine backhoe system. One is the single-bucket truck operation process, and the other is the stripping shovel backhoe process. As Figure 2 shown, the upper backhoe area (S1) is the single-bucket truck operation area, and its annual operation volume is M 单斗 ; the lower backhoe area (S2, S3) is the stripping shovel backhoe operation area, and the annual operation volume during the stripping shovel backhoe operation is M拉 S1, S2, and S3 vary with the variation of the dragline stripping zone. Within different stripping zones of the open-pit mine, the values of S1, S2, and S3 are different; within the same stripping zone of the open-pit mine, S1, S2, and S3 can be obtained through on-site measurement.

[0136] In this embodiment, the annual operation volume M during the dragline overburden operation 拉 is a fixed value and is related to the open-pit mine. Taking the Heidaigou Coal Mine as an example, the annual operation volume M during the dragline overburden operation 拉 is 16 million cubic meters per year.

[0137] In one of the embodiments, the second relationship model is:

[0138]

[0139] wherein, δ1, δ2, and δ3 are fitting constants obtained by fitting according to the historical muck pile curve under the height of the throwing blasting bench in the open-pit mine overburden operation;

[0140] The historical muck pile curve is drawn based on the height of the dragline overburden operation platform, the cross-sectional area of the dragline operation, the cross-sectional area of the secondary overburden operation, and the cross-sectional area of the shovel-truck operation.

[0141] In one of the embodiments, according to M 煤 and g(H 站 ) to obtain the third relationship model:

[0142]

[0143]

[0144] The third relationship model obtained according to the above formulas (3) and (4) is:

[0145]

[0146] wherein, δ1, δ2, and δ3 take different values under different heights of the throwing blasting bench. For example, when the height of the throwing blasting bench is 40m, δ1 = -6.3929, δ2 = 257.39, and δ3 = 178.36.

[0147] By calculating the third relationship model, the connection between the height of the dragline overburden operation platform and the raw coal production capacity and the average thickness of the dragline stripping zone is established, so as to calculate the height of the dragline overburden operation platform according to the known raw coal production capacity and the average thickness data of the dragline stripping zone.

[0148] By respectively for the height of the throwing blasting bench H 抛 = 40m, H 抛 = 45m, H 抛Fitting multiple historical muckpile curves under the condition of H = 50m to obtain the height H of the cast blasting bench 抛 = 40m, H 抛 = 45m, H 抛 The fitting curves under the conditions of = 50m are respectively as shown in Figure 3 , Figure 4 , Figure 5 . The abscissa in the figure is the height of the dragline casting operation platform, and the ordinate is the raw coal production capacity.

[0149] In one of the embodiments, when the height of the cast blasting bench is 40m, δ1 = -6.3929, δ2 = 257.39, δ3 = 178.36; the second relationship model is:[[]]

[0150]

[0151] The fitting constants in the second relationship model are obtained according to the data in Table 1.

[0152] The corresponding third relationship model is:[[]]

[0153]

[0154] In this embodiment, the length l of the dragline mining belt in the open-pit mine 煤 , the bulk density γ of the raw coal in the open-pit mine, the blasting width b of the mining belt in the open-pit mine, the working line length l of the cast blasting bench operation 倒 , and the average thickness H of the dragline mining belt 煤 are related to a specific open-pit mine and are measured on-site in the specific open-pit mine. Taking the Heidaigou Coal Mine as an example, the length l of the dragline mining belt in the open-pit mine 煤 = 2250m, the bulk density γ of the raw coal in the open-pit mine = 85m 3 / t, the blasting width b of the mining belt in the open-pit mine = 1047m, and the working line length l of the cast blasting bench operation 倒 = 1700m.

[0155] According to the second relationship model under different conditions of the height of the cast blasting bench, the raw coal production capacity of the open-pit mine under different conditions of the height of the cast blasting bench can be obtained. For example, substituting the second relationship model under the condition of the height H 抛 = 40m of the cast blasting bench into formula (10), the raw coal production capacity of the open-pit mine under the condition of the height H 抛 = 40m of the cast blasting bench can be obtained, as shown in formula (13):

[0156]

[0157] In one of the embodiments, when the height of the throw blasting bench is 45 m, δ1 = 0.9405, δ2 = 129.56, and δ3 = 708.93;

[0158] The second relational model is:

[0159]

[0160] The corresponding third relational model is:

[0161]

[0162] Substituting the data gives:

[0163]

[0164] In one of the embodiments, when the height of the throw blasting bench is 50 m, δ1 = 0.9405, δ2 = 129.56, and δ3 = 708.93;

[0165] The second relational model is:

[0166]

[0167] The corresponding third relational model is:

[0168]

[0169] Substituting the data gives:

[0170]

[0171] In this embodiment, in the same mining belt, the average thickness H of the dragline mining belt 煤 is a fixed value. In different mining belts of the open-pit mine, the average thickness H of the dragline mining belt 煤 is different and is related to the actual situation of the open-pit mine, and can be obtained by on-site measurement.

[0172] In this embodiment, according to the curve fitting results under different throw blasting bench height conditions and the raw coal production capacity of the open-pit mine under different throw blasting bench height conditions, a relational model between the standing horizontal height of the dragline, the raw coal production capacity, and the average thickness of the raw coal is constructed under different throw blasting bench height conditions, as well as a third relational model. Specifically, according to the first relational model and multiple second relational models, multiple third relational models are obtained, and the multiple third relational models respectively correspond to multiple throw blasting bench heights. Further, the third relational model is a three-dimensional space surface model of the standing horizontal height of the dragline during the backhoe operation, the average thickness of the dragline mining belt, and the raw coal production capacity under the throw blasting bench height, as Figure 6 shown.

[0173] In one of the embodiments, it further includes: optimizing the stripping shovel backhoe operation platform height in complex geological areas according to the calculated stripping shovel backhoe operation platform height.

[0174] Optimizing the stripping shovel backhoe operation platform height in complex geological areas by the calculated stripping shovel backhoe operation platform height, thereby improving the operation efficiency.

[0175] Table 4 is the calculation table of the stripping shovel standing horizontal height and the operation volume. The stripping shovel standing horizontal height is the stripping shovel backhoe operation platform height.

[0176]

[0177] Table 4

[0178] In this embodiment, according to the preset relationship model between the stripping shovel platform height and the cross-sectional area of the stripping shovel operation unit, a relationship model (the first relationship model) between the stripping shovel platform height and the annual raw coal output of the open-pit mine is established; the historical muck pile curve under the throwing blasting bench height in the open-pit mine backhoe operation is fitted to obtain a relationship model (the second relationship model) between the stripping shovel backhoe operation platform height and the stripping shovel operation volume; based on the relationship model between the stripping shovel platform height and the annual raw coal output of the open-pit mine and the relationship model between the stripping shovel backhoe operation platform height and the stripping shovel operation volume, a relationship model (the third relationship model) between the stripping shovel platform height, the raw coal production capacity, and the average thickness of the stripping shovel mining belt under the throwing blasting bench height is constructed; based on the third relationship model, according to the raw coal production capacity of each mining belt in the open-pit mine, the average thickness of the stripping shovel mining belt, and the stripping shovel operation volume, the stripping shovel backhoe operation platform height is determined. Thereby, the stripping shovel backhoe operation platform height in complex geological areas is optimized, effectively ensuring the operation efficiency of the stripping shovel under complex geological conditions, and ensuring the stable and continuous stripping progress during the open-pit mine mining and the raw coal output of the open-pit mine.

[0179] The above are only the principles and preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, based on the principles of the present invention, several other variations can also be made, which should also be regarded as the protection scope of the present invention.

Claims

1. A method for determining the height of the shovel dumping operation platform in an open-pit mine, characterized in that, Including: Establish a first relationship model according to a preset relationship model between the height of the dragline stripping operation platform and the cross-sectional area of the dragline operation unit. The first relationship model is a relationship model between the height of the dragline stripping operation platform and the raw coal production capacity of the open-pit mine. Fit the historical muckpile curves at different throw blasting bench heights in the open-pit mine stripping operation to obtain a second relationship model. In the second relationship model, different throw blasting bench heights correspond to different fitting constants. The second relationship model is a relationship model between the height of the dragline stripping operation platform and the dragline operation volume. Substitute the second relationship model into the first relationship model to obtain a third relationship model. The third relationship model is a relationship model between the height of the dragline stripping operation platform at the throw blasting bench height, the raw coal production capacity of the open-pit mine, and the average thickness of the dragline excavation zone. Substitute the raw coal production capacity of each excavation zone of the open-pit mine and the average thickness of the dragline excavation zone into the third relationship model to determine the height of the dragline stripping operation platform. The formula of the preset relationship model is: ， Among them, represents the height of the shovel dumping operation platform; Represents a dependent function related to the height of the dragline stripping operation platform; Indicates the unit cross-sectional area of the dragline platform and the corresponding coal bunker in the inverted heap operation; It represents the unit cross-sectional area of the dragline platform ahead of the ditch during the dragline overburden operation; Annual operation volume during dragline stripping operation The calculation formula is as follows: ， Bring the preset relationship model into the calculation formula of the annual workload to obtain The calculation formula is as follows: ， Thus, the first relationship model is: ， Among them, represents the annual operation volume during the stripping shovel backhoe operation; Indicates the length of the dragline excavation zone in an open-pit mine; Represents the average thickness of the dragline excavation zone in an open-pit mine; Indicates the bulk density of raw coal in an opencast mine; Indicates the blasting width of the excavation zone in an open-pit mine; Indicates the raw coal production capacity of the opencast mine; Indicates the working line length of the bench operation for cast blasting; The derivation process of the calculation formula is as follows: ， Obtain: ， Among them, represents the annual advancement of the mining strip in the open-pit mine; ; represents the total cross-sectional area of the operation of the dragline stripping system; Indicates the cross-sectional area of the upper layered operation area of the inverted heap; ( ) represents the cross-sectional area of the lower stratified operation area of the inverted heap; , represents the annual operation volume of the open-pit mine stripping system; Therefore: Annual operation volume of single-bucket truck The calculation formula is as follows: ， Annual operation volume during dragline stripping operation The calculation formula is as follows: ； The second relationship model is: ， Among them, , , are fitting constants obtained by fitting the historical muckpile curves at the height of the throw blasting bench in the open-pit mine backhoe operation. The historical muckpile curves are drawn based on the height of the dragline stripping operation platform, the cross-sectional area of the dragline operation, the cross-sectional area of the secondary stripping operation, and the cross-sectional area of the shovel-truck operation.

2. The method for determining the height of the dragline stripping operation platform of an open-pit mine according to claim 1, wherein According to and obtain the third relational model: ， ， The third relationship model obtained according to the above two formulas is: ， Among them, , , take different values at different bench heights of throw blasting.

3. The method for determining the height of the dragline stripping operation platform of an open-pit mine according to claim 2, wherein When the height of the bench for throw blasting is 40m, , , ; The second relational model is: ， The corresponding third relationship model is:

4. The method for determining the height of the dragline stripping operation platform of an open-pit mine according to claim 2, wherein When the height of the bench for throw blasting is 45m, , , The second relationship model is: The corresponding third relationship model is:

5. The method for determining the height of the dragline stripping operation platform of an open-pit mine according to claim 2, wherein When the height of the bench for throw blasting is 50m, , , ; The second relationship model is: The corresponding third relationship model is:

6. The method for determining the height of the dragline stripping operation platform of an open-pit mine according to any one of claims 1-5, wherein It further includes: optimizing the height of the dragline stripping operation platform in the complex geological area according to the calculated height of the dragline stripping operation platform.

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