CN117390901B - Slope parameter determination method for surface mining boundary - Google Patents
Slope parameter determination method for surface mining boundary Download PDFInfo
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- CN117390901B CN117390901B CN202311704452.3A CN202311704452A CN117390901B CN 117390901 B CN117390901 B CN 117390901B CN 202311704452 A CN202311704452 A CN 202311704452A CN 117390901 B CN117390901 B CN 117390901B
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- 238000005065 mining Methods 0.000 title claims abstract description 141
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005192 partition Methods 0.000 claims abstract description 66
- 239000011435 rock Substances 0.000 claims abstract description 49
- 239000002689 soil Substances 0.000 claims abstract description 26
- 238000005422 blasting Methods 0.000 claims abstract description 22
- 238000005457 optimization Methods 0.000 claims abstract description 13
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims description 19
- 238000004364 calculation method Methods 0.000 claims description 14
- 238000003723 Smelting Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims description 3
- 238000005272 metallurgy Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/26—Methods of surface mining; Layouts therefor
- E21C41/30—Methods of surface mining; Layouts therefor for ores, e.g. mining placers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Abstract
The invention provides a slope parameter determining method of an open-pit mining boundary, which comprises the following steps: dividing a mining area into a plurality of engineering geological partitions, and determining an initial slope angle of the mining area; forming an optimization basis based on the technical economic parameters and the recovery rate indexes, and determining an optimal exploitation boundary according to the initial slope angle and the optimization basis; analyzing the rock-soil property and the mining operation mode of the engineering geological partition, and determining the step height of the optimal mining boundary by combining whether blasting is carried out or not; determining a step slope angle of an optimal exploitation boundary through rock mechanical parameters; and laying step association parameters based on the mining depth of the optimal mining boundary, and accurately calculating the final slope angle of the engineering geological partition according to a formula to obtain the slope parameters with the best economic benefit under safe production. The defect that the conventional surface mine adopts a similar mine experience method to determine the parameters of the side slope is overcome, and the stability and the economical efficiency of the side slope are ensured.
Description
Technical Field
The application relates to the technical field of mineral resource development, in particular to a slope parameter determining method of an open pit mining boundary.
Background
The determination of the final mining boundary is an important task in surface mining design and planning, and in the surface mining design process, the selection of boundary slope parameters is always a core task, and platforms, roads and slopes are reasonably arranged by combining the optimal mining boundary obtained by boundary optimization to form a boundary which can be implemented.
For an open pit mine, when the slope angle of the boundary of the open pit is increased by 1 degree, the stripping amount is reduced by 3.5% -4.3%, and when the stripping amount is slowed down by 10 degrees, the stripping amount is increased by about 1.05-1.20 times, so that obvious economic benefits can be brought by determining the slope parameters of the open pit mine on the premise of guaranteeing the slope safety of the open pit. Namely, when the slope parameters are selected, if the parameters are too conservative, the safety exploitation is ensured, but the condition that the slope is covered with resources exists, and the formed open-air boundary is not the most economical; if the peeling amount is reduced in the open-air boundary, the peeling ratio is reduced, and the economic benefit is improved, but the safety production is threatened. Therefore, the obtained effective and reliable side slope parameters can ensure the safe and efficient production of mines.
At present, most surface mines adopt an empirical analogy method in the aspect of slope parameter selection, namely the empirical parameters similar to mines are directly used for determining the slope parameters, but the empirical analogy method cannot fully consider the variable factors of the current specific mines, the selected slope parameters are not matched with the actual mine conditions easily, the slope stability is reduced, the safety risk is further increased, and in order to reduce the safety risk, the engineering excavation amount is reduced easily when the more conservative slope parameters are selected, so that the resource waste is caused, and the economic benefit is poor.
Disclosure of Invention
The embodiment of the application provides a slope parameter determining method for surface mining boundaries, which aims to solve the technical problems that in the prior art, the slope parameter is determined by an empirical analogy method, the slope parameter is inconsistent with the actual mine situation, the slope stability is easy to decrease, the safety risk is easy to increase, and in order to avoid the reduction of the safety risk, the slope parameter is easy to cause resource waste and the economic benefit is reduced when the slope parameter is conservatively regulated.
The embodiment of the application provides a slope parameter determining method of a surface mining boundary, which comprises the following steps:
dividing the mining area to obtain a plurality of engineering geological partitions, and determining initial slope angles of the engineering geological partitions;
acquiring technical and economic parameters and recovery rate indexes to form an optimization basis, and determining an optimal mining boundary according to the initial slope angle and the optimization basis;
analyzing the rock-soil property and the mining operation mode of the engineering geological partition, and determining the step height of the optimal mining boundary based on the rock-soil property, the mining operation mode and whether blasting is performed or not;
determining a step slope angle of the optimal mining boundary through rock mass mechanical parameters of the engineering geological partition;
and laying step association parameters based on the mining depth of the optimal mining boundary, and determining the final slope angle of the engineering geological partition through the step association parameters and a calculation formula.
Further, the step of determining an initial slope angle of the engineering geological partition comprises:
analyzing the structure surface shape, density and scale of the engineering geological partition to obtain the rock mass quality rating of the engineering geological partition;
and determining a reference mine through the rock mass quality rating of the engineering geological partition, and setting up an initial slope angle for the engineering geological partition.
Further, the technical and economic parameters comprise mining cost, beneficiation cost, smelting cost, stripping operation cost, period fee, tax and product sales price, and the recovery indexes comprise mining loss, depletion rate and comprehensive recovery rate of beneficiation and smelting.
Further, the geotechnical properties include: soft ore rock, hard ore rock and sandy ore rock, wherein the mining operation mode comprises the following steps: manual mining and mechanical shoveling.
Further, the step of determining the step height of the optimal mining boundary based on the rock-soil property, the mining operation mode and whether blasting is performed comprises:
when the rock-soil property is soft ore rock, if the mining operation mode is manual mining and blasting is not performed, the step height of the optimal mining boundary is not more than 3.0m;
when the rock-soil property is hard ore rock, if the mining operation mode is manual mining and blasting is not performed, the step height of the optimal mining boundary is not more than 6.0m;
when the rock-soil property is sandy ore rock, if the mining operation mode is manual mining and blasting is not performed, the step height of the optimal mining boundary is not more than 1.8m;
when the rock-soil property is soft ore rock, if the mining operation mode is mechanical shoveling and blasting is not performed, the step height of the optimal mining boundary is not greater than the maximum mining depth of the machinery;
when the rock-soil property is hard ore rock, if the mining operation mode is mechanical shoveling and blasting is performed, the step height of the optimal mining boundary is not more than 1.5 times of the maximum mining depth of the machine.
Further, the step of determining the step slope angle of the optimal mining boundary by the rock mechanical parameters of the engineering geological partition comprises:
measuring uniaxial compressive strength of the rock sample of the engineering geological partition;
determining the common coefficient of the engineering geological partition through the uniaxial compressive strength;
and selecting the step slope angle of the optimal mining boundary based on the common coefficient.
Further, the step of determining the final slope angle of the engineering geological partition through the step association parameter and the calculation formula comprises the following steps:
determining different platform types arranged on the steps according to preset specifications, wherein the platform types comprise a safety platform and a cleaning platform, and acquiring the width of the safety platform and the width of the cleaning platform;
the width of a transportation platform connected with the safety platform and the cleaning platform is respectively obtained;
and calculating the final slope angle of the engineering geological partition through the width of the safety platform, the width of the cleaning platform, the width of the transportation platform, the optimal exploitation boundary and the step slope angle.
Further, the calculation formula of the final slope angle is as follows:
，
wherein,representing the final slope angle +.>Representing the highest mining elevation->Representing the lowest mining elevation>Representing the width of the security platform>Represents the width of the cleaning platform, < >>Representing the width of the transport platform>Indicating the step slope angle.
Further, after the step of setting the step association parameter based on the mining depth of the optimal mining boundary and determining the final slope angle of the engineering geological partition through the step association parameter and a calculation formula, the method further comprises the following steps:
and carrying out safety verification on the final slope angle of the engineering geological partition.
Further, the step of verifying the security of the final slope angle of the engineering geological partition comprises the following steps:
carrying out load analysis on a final slope angle of the engineering geological partition through numerical simulation software so as to obtain a load coefficient corresponding to the final slope angle;
comparing the load coefficient with a preset load level to determine the safety level of the final slope angle;
and judging whether the security level meets the rule specification.
Compared with the related art, the invention has the beneficial effects that: after the initial slope angle is determined, the optimal ideal mining boundary is obtained through the initial slope angle, the technical economic parameter and the recovery rate index; and comprehensively considering the relation between the mine rock common coefficient and the step slope angle, determining step association parameters, namely determining the layout of the safety platform, the cleaning platform and the transportation platform of each partition, and obtaining the slope parameters with the best economic benefit under the safety production. The invention overcomes the defect that the traditional surface mine adopts a similar mine experience method to determine the slope parameters, effectively ensures the slope stability and the slope economy, has the advantages of simple calculation formula, high efficiency flow, strong traceability and the like, and has good popularization and application values.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the other features, objects, and advantages of the application.
Drawings
FIG. 1 is a flow chart of a method for determining slope parameters of a surface mining boundary in an embodiment of the present invention;
FIG. 2 is a plan view of a mining area after region division in a slope parameter determination method for a surface mining boundary in an embodiment of the present invention;
FIG. 3 is a schematic diagram of structural parameters of an engineering geological partition in a slope parameter determination method of a surface mining boundary in an embodiment of the present invention;
the invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described and illustrated below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments provided herein, are intended to be within the scope of the present application.
It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to apply the present application to other similar situations according to these drawings without inventive effort. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the embodiments described herein can be combined with other embodiments without conflict.
Referring to fig. 1 and 2, the method for determining slope parameters of a surface mining boundary according to an embodiment of the present invention includes the following steps:
step S10: dividing the mining area to obtain a plurality of engineering geological partitions, and determining initial slope angles of the engineering geological partitions;
the joint density of different areas of the mining area can be obtained to determine the rock integrity degree of the different areas of the mining area, and then adjacent areas with the same rock integrity degree are divided into the same engineering geological partition based on the rock integrity degree of the different areas, so that the mining area is divided into a plurality of engineering geological partitions. In this embodiment, the mine is divided into 4 of the engineering geological partitions.
Specifically, the step S10 includes:
s110: analyzing the structure surface shape, density and scale of the engineering geological partition to obtain the rock mass quality rating of the engineering geological partition;
s120: and determining a reference mine through the rock mass quality rating of the engineering geological partition, and setting up an initial slope angle for the engineering geological partition.
In general, the rock mass quality rating results are: good, general, poor and bad. And after the rock mass quality rating of the engineering geological partition is finished, selecting a mine similar to the rock mass quality rating of the engineering geological partition as a reference mine, and determining a slope angle of the reference mine as the initial slope angle of the engineering geological partition.
Step S20: acquiring technical and economic parameters and recovery rate indexes to form an optimization basis, and determining an optimal mining boundary according to the initial slope angle and the optimization basis;
the technical and economic parameters comprise mining cost, ore dressing cost, ore smelting cost, stripping operation cost, period fee, tax fee and product sales price, and the recovery indexes comprise mining loss, depletion rate and comprehensive recovery rate of ore dressing and smelting.
In the step, factors such as product types, market demands, dressing and smelting processes and the like are comprehensively considered, so that the factors are taken as the basis for boundary optimization. Specifically, after the initial slope angle and the optimization basis are acquired, boundary optimization is performed by means of three-dimensional mining software based on an L-G graph theory method, 15 boundaries are acquired according to different product price coefficients, the maximum net present value and the average stripping ratio are smaller than the economic reasonable stripping ratio as optimization principles, and the optimal mining boundary is determined from the 15 boundaries, wherein the longitudinal range of the optimal mining boundary is the mining depth.
Step S30: analyzing the rock-soil property and the mining operation mode of the engineering geological partition, and determining the step height of the optimal mining boundary based on the rock-soil property, the mining operation mode and whether blasting is performed or not;
the geotechnical properties include: soft ore rock, hard ore rock and sandy ore rock, wherein the mining operation mode comprises the following steps: manual mining and mechanical shoveling.
Specifically, the step S30 includes:
s310: when the rock-soil property is soft ore rock, if the mining operation mode is manual mining and blasting is not performed, the step height of the optimal mining boundary is not more than 3.0m;
s320: when the rock-soil property is hard ore rock, if the mining operation mode is manual mining and blasting is not performed, the step height of the optimal mining boundary is not more than 6.0m;
s330: when the rock-soil property is sandy ore rock, if the mining operation mode is manual mining and blasting is not performed, the step height of the optimal mining boundary is not more than 1.8m;
s340: when the rock-soil property is soft ore rock, if the mining operation mode is mechanical shoveling and blasting is not performed, the step height of the optimal mining boundary is not greater than the maximum mining depth of the machinery;
s350: when the rock-soil property is hard ore rock, if the mining operation mode is mechanical shoveling and blasting is performed, the step height of the optimal mining boundary is not more than 1.5 times of the maximum mining depth of the machine.
According to different rock and soil properties and mining operation modes, the step heights h in the optimal mining boundaries are different, and the number of steps is determined based on the optimal mining boundaries and the step heights h.
Step S40: determining a step slope angle in the optimal mining boundary through rock mechanical parameters of the engineering geological partition;
specifically, the step S40 includes:
s410: measuring uniaxial compressive strength of the rock sample of the engineering geological partition;
the maximum compressive stress that the rock sample can bear before reaching the damage under the action of the uniaxial compressive load is called the uniaxial compressive strength, and the measuring mode of the uniaxial compressive strength is used more, and is not repeated here.
S420: determining the common coefficient of the engineering geological partition through the uniaxial compressive strength;
s430: and selecting the step slope angle in the optimal mining boundary based on the common coefficient.
The correspondence between the common coefficient and the step slope angle is shown in the following table:
。
step S50: step association parameters are arranged on the basis of the mining depth of the optimal mining boundary, and the final slope angle of the engineering geological partition is determined through the step association parameters and a calculation formula;
referring to fig. 3, specifically, the step S50 includes:
s510: determining different platform types arranged on the steps according to preset specifications, wherein the platform types comprise a safety platform and a cleaning platform, and acquiring the width of the safety platform and the width of the cleaning platform;
in this embodiment, the preset specification is GB50771-2012 "nonferrous metal mining design specification", and the type of the platform on the step is determined based on the setting requirements of the safety platform and the cleaning platform therein. On the premise of meeting the safety regulation specification, the final slope angle is obtained. It will be appreciated that the final slope angle is the slope parameter of the surface mining boundary. In this embodiment, 1 cleaning platform is set every 2 to 3 safety platforms.
S520: the width of a transportation platform connected with the safety platform and the cleaning platform is respectively obtained;
the width of the transportation platform is the sum of the width of the mine road surface and the width of the road shoulder.
S530: calculating a final slope angle of the engineering geological partition through the width of the safety platform, the width of the cleaning platform, the width of the transportation platform, the optimal exploitation boundary and the step slope angle;
the calculation formula of the final slope angle is as follows:
，
wherein,representing the final slope angle +.>Representing the highest mining elevation->Representing the lowest mining elevation>Representing the width of the security platform>Represents the width of the cleaning platform, < >>Representing the width of the transport platform>Indicating the step slope angle. It will be appreciated that the difference between the highest and lowest production levels is the longitudinal extent of the optimal production boundary.
After the initial slope angle is determined, the optimal ideal mining boundary is obtained through the initial slope angle, the technical economic parameter and the recovery rate index; and comprehensively considering the relation between the mine rock common coefficient and the step slope angle, determining step association parameters, namely determining the layout of the safety platform, the cleaning platform and the transportation platform of each partition, and obtaining the slope parameters with the best economic benefit under the safety production. The invention overcomes the defect that the traditional surface mine adopts a similar mine experience method to determine the slope parameters, effectively ensures the slope stability and the slope economy, has the advantages of simple calculation formula, high efficiency flow, strong traceability and the like, and has good popularization and application values.
Preferably, the slope parameter determining method of the surface mining boundary further comprises:
step S60: and carrying out safety verification on the final slope angle of the engineering geological partition.
Specifically, the step S60 includes:
s610: carrying out load analysis on a final slope angle of the engineering geological partition through numerical simulation software so as to obtain a load coefficient corresponding to the final slope angle;
according to the specification of GB51016-2014 "non-coal strip mine side slope engineering Specification": the slope stability evaluation should be quantitatively calculated based on qualitative analysis, and comprehensively evaluated. The limit balance analysis method is the most commonly used method for analyzing the stability of the outdoor slope, and the stability of the slope is measured through the safety coefficient of the slope. Therefore, in this embodiment, load analysis is performed on the final SLOPE angle of the engineering geological partition by using SLOPE software, that is, stability calculation is performed on a certain section of the engineering geological partition by using SLOPE software, so as to obtain the load coefficient.
S620: comparing the load coefficient with a preset load level to determine the safety level of the final slope angle;
the relationship between the load factor and the safety level is shown in the following table:
，
in the above table, load combination I is: dead weight + groundwater; the load combination II is as follows: dead weight, groundwater and blasting vibration force; the load combination III is as follows: dead weight + groundwater + earthquake force. Based on different operating conditions, the corresponding load combinations may be selected correspondingly to determine the security level.
S630: and judging whether the security level meets the rule specification.
If the security level does not meet the specification, the initial slope angle is redetermined in step S10, and the calculation of the final slope angle is completed. The safety level is determined based on the final slope angle, so that the stability of the slope can be further ensured, the safety risk is reduced, and the determination of the final slope angle is more comprehensively considered.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (8)
1. The slope parameter determination method for the surface mining boundary is characterized by comprising the following steps of:
dividing the mining area to obtain a plurality of engineering geological partitions, and determining initial slope angles of the engineering geological partitions;
acquiring technical and economic parameters and recovery rate indexes to form an optimization basis, and determining an optimal mining boundary according to the initial slope angle and the optimization basis;
analyzing the rock-soil property and the mining operation mode of the engineering geological partition, and determining the step height of the optimal mining boundary based on the rock-soil property, the mining operation mode and whether blasting is performed or not;
determining a step slope angle of the optimal mining boundary through rock mass mechanical parameters of the engineering geological partition;
step association parameters are arranged on the basis of the mining depth of the optimal mining boundary, and the final slope angle of the engineering geological partition is determined through the step association parameters and a calculation formula;
the step of determining the final slope angle of the engineering geological partition through the step association parameter and the calculation formula comprises the following steps:
determining different platform types arranged on the steps according to preset specifications, wherein the platform types comprise a safety platform and a cleaning platform, and acquiring the width of the safety platform and the width of the cleaning platform;
the width of a transportation platform connected with the safety platform and the cleaning platform is respectively obtained;
calculating a final slope angle of the engineering geological partition through the width of the safety platform, the width of the cleaning platform, the width of the transportation platform, the optimal exploitation boundary and the step slope angle;
the calculation formula of the final slope angle is as follows:
，
wherein,representing the final slope angle +.>Representing the highest mining elevation->Representing the lowest mining elevation>Representing the width of the security platform>Represents the width of the cleaning platform, < >>Representing the width of the transport platform>Indicating the step slope angle.
2. The method of determining slope parameters of a surface mining boundary according to claim 1, wherein the step of determining an initial slope angle of the engineering geological partition comprises:
analyzing the structure surface shape, density and scale of the engineering geological partition to obtain the rock mass quality rating of the engineering geological partition;
and determining a reference mine through the rock mass quality rating of the engineering geological partition, and setting up an initial slope angle for the engineering geological partition.
3. The method of claim 1, wherein the technical economic parameters include mining cost, beneficiation cost, smelting cost, stripping operation cost, period cost, tax and product sales price, and the recovery indexes include mining loss, depletion rate and beneficiation and metallurgy comprehensive recovery rate.
4. The method of slope parameter determination for a surface mining boundary of claim 1, wherein the rock-soil property comprises: soft ore rock, hard ore rock and sandy ore rock, wherein the mining operation mode comprises the following steps: manual mining and mechanical shoveling.
5. The method of determining slope parameters of a surface mining boundary according to claim 4, wherein the step of determining a step height of the optimal mining boundary based on the rock-soil property, the mining operation mode, and whether blasting is performed comprises:
when the rock-soil property is soft ore rock, if the mining operation mode is manual mining and blasting is not performed, the step height of the optimal mining boundary is not more than 3.0m;
when the rock-soil property is hard ore rock, if the mining operation mode is manual mining and blasting is not performed, the step height of the optimal mining boundary is not more than 6.0m;
when the rock-soil property is sandy ore rock, if the mining operation mode is manual mining and blasting is not performed, the step height of the optimal mining boundary is not more than 1.8m;
when the rock-soil property is soft ore rock, if the mining operation mode is mechanical shoveling and blasting is not performed, the step height of the optimal mining boundary is not greater than the maximum mining depth of the machinery;
when the rock-soil property is hard ore rock, if the mining operation mode is mechanical shoveling and blasting is performed, the step height of the optimal mining boundary is not more than 1.5 times of the maximum mining depth of the machine.
6. The method of determining slope parameters of a surface mining boundary according to claim 1, wherein the step of determining a step slope angle of the optimal mining boundary from rock mechanics parameters of the engineering geological partition comprises:
measuring uniaxial compressive strength of the rock sample of the engineering geological partition;
determining the common coefficient of the engineering geological partition through the uniaxial compressive strength;
and selecting the step slope angle of the optimal mining boundary based on the common coefficient.
7. The method according to claim 1, further comprising, after the step of setting step-related parameters based on the mining depth of the optimal mining boundary and determining the final slope angle of the engineering geological partition by the step-related parameters and a calculation formula:
and carrying out safety verification on the final slope angle of the engineering geological partition.
8. The method of determining slope parameters of a surface mining boundary of claim 7, wherein the step of verifying the final slope angle of the engineering geological partition comprises:
carrying out load analysis on a final slope angle of the engineering geological partition through numerical simulation software so as to obtain a load coefficient corresponding to the final slope angle;
comparing the load coefficient with a preset load level to determine the safety level of the final slope angle;
and judging whether the security level meets the rule specification.
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| RU2528704C1 (en) * | 2013-05-06 | 2014-09-20 | Федеральное государственное бюджетное учреждение науки Институт горного дела Уральского отделения Российской академии наук (ИГД УрО РАН) | Method of open working out of steep deposits of platform shape |
| CN110616722A (en) * | 2019-09-23 | 2019-12-27 | 中南大学 | Slope safety design method and device for strip mine mining boundary and storage medium |
| CN112364474A (en) * | 2020-09-18 | 2021-02-12 | 辽宁工程技术大学 | Mining scheme optimization method based on strip mine partition mining process |
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