CN111734411A - Ore blending method of sill pillar-free sublevel caving method with vertically-arranged approach - Google Patents
Ore blending method of sill pillar-free sublevel caving method with vertically-arranged approach Download PDFInfo
- Publication number
- CN111734411A CN111734411A CN202010645140.XA CN202010645140A CN111734411A CN 111734411 A CN111734411 A CN 111734411A CN 202010645140 A CN202010645140 A CN 202010645140A CN 111734411 A CN111734411 A CN 111734411A
- Authority
- CN
- China
- Prior art keywords
- blocks
- year
- ore
- unit
- block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
Abstract
The invention discloses an ore blending method of a sill pillar-free sublevel caving method with a vertically-oriented route, which comprises the steps of dividing ore blocks along the direction of an ore body, dividing mining unit blocks in the ore blocks, and dividing the mining unit blocks in the ore blocks into adult unit blocks and pseudo-year unit blocks; then, ore blending is carried out according to certain conditions to obtain an optimal ore blending scheme of the sectional ore body. The mine can guide the mining operation according to the optimal ore blending scheme. The invention can not only ensure the high efficiency and the order of the stoping work and the stability of the grade of the selected ore, but also improve the economic benefit of mine enterprises and improve the utilization rate of mineral resources.
Description
Technical Field
The invention belongs to the technical field of underground mining ore blending, and particularly relates to an ore blending method of a sill pillar-free sublevel caving method with a vertically arranged approach, which has large ore body thickness and uneven ore grade distribution.
Background
Ore blending is a system engineering for integrating ore quality by combining mine production targets and production technical condition limitations, and different grades of ores are matched and uniformly mixed according to a certain proportion so as to meet the quality requirements of mine ore products. Through carrying out quality matching and neutralization on ores with different grades at different heights, the output quantity of qualified ores is increased, the fluctuation of the selected grade of the ores is minimum, the production cost is reduced, the economic benefit of mine enterprises is improved, and the utilization rate of mineral resources is improved. At present, mines with accesses arranged in a vertical direction by a sill pillar-free sublevel caving method are mined according to a certain sequence, the problem of ore blending is rarely considered, the grade of mined ores is unbalanced, the unqualified rate of ore products is high, the ore dressing cost is greatly increased, and the economic benefit of enterprises is not facilitated.
Disclosure of Invention
The invention aims to provide an ore blending method of a sill pillar-free sublevel caving method for a vertically running route, aiming at the characteristics of a mine with a sill pillar-free sublevel caving method for vertically running route arrangement, such as large ore body thickness, uneven grade distribution, large fluctuation of the selected grade of a selected factory, and the like.
The purpose of the invention is realized by the following technical scheme.
The invention relates to an ore blending method of a sill pillar-free sublevel caving method with vertically arranged approach, which is characterized by comprising the following steps:
the first step is as follows: initialization
S1, dividing ore blocks along the trend of the ore body, wherein the length of each ore block is 60-400 m, the width of each ore block is the actual width of the ore body, the stage height of each ore block is 60-180 m, the stage height is 10-30 m, the route interval is 10-30 m, and each ore block is provided with a mining area ore pass outside the vein;
s2, dividing mining unit blocks in the ore block, wherein the length of the mining unit blocks is 10 m-30 m, the ore caving thickness of the wide mine during one-time mining is 1.5 m-4 m, the length is still divided according to 10 m-30 m when the size of the mining unit blocks is insufficient, and the width is the residual actual width; each mining unit block comprises respective grade, ore quantity and impurity attribute;
s3, on the basis of the extraction unit blocks, a year unit block is formed by a plurality of extraction unit blocks again, and the forming method comprises the following steps: dividing in respective ore blocks according to the sequence from an upper plate cutting roadway to a lower plate, and forming 10-30 mining unit blocks into annual unit blocks; the residual mining unit blocks in the ore block are not enough to form a part of a year unit block, and form a pseudo year unit block; each year unit block and each pseudo year unit block contain respective average grade, ore quantity and impurity attribute;
the second step is that: subflow 1: annual cell block ore blending
S4, dividing the mining-capable year cell blocks, wherein the mining-capable year cell blocks are year cell blocks which are not participated in ore matching in each ore block at the top disk, and all the mining-capable year cell blocks divided in the section are used as necessary conditions for the next calculation;
s5, performing group grouping combination on all the divided collectable year cell blocks to obtain an X group result, and taking out a group of year cell blocks with the average grade closest to the average grade of the section in the X group;
the number of the annual cell blocks in each group in the X group is equal to the number of the scraper which works simultaneously, and each annual cell block which can be mined comes from different ore blocks;
after S5, the processing proceeds to decision condition P1: judging whether the stoping distance between the newly divided mineable year cell blocks is larger than the width of one year cell block or not after the stoping of the group of year cell blocks is finished;
if the determination condition P1 is no, the process proceeds to S6;
s6, dividing the group of year unit blocks into a year unit block optimal ore blending scheme to form a group of year unit blocks in the year unit block optimal ore blending scheme;
if the determination condition P1 is YES, the process proceeds to the determination condition P2;
determination condition P2: determining whether the stope distance between mineable year cell blocks in S4 has been greater than the width of one year cell block;
if the judgment condition P2 is not met, entering P2S1, namely selecting a group of annual cell blocks of which the average grade is superior to the average grade in the group of X component results, and then entering the judgment condition P1;
if the determination condition P2 is yes, the process proceeds to P2S 2: redefining the collectable year cell block with the highest disc position as a preferred year cell block together with the year cell block with the recovery distance smaller than the width of the year cell block based on the collectable year cell block, and entering a judgment condition P3;
determination condition P3: judging whether the number of the preferred annual unit blocks is more than or equal to the number of the scraper working at the same time;
if the determination condition P3 is NO, the process proceeds to P3S 1: preferably, the year cell blocks are respectively grouped and combined with other collectable year cell blocks for calculation, and finally, a group of year cell blocks with the average grade closest to the average grade of the section in the X group is taken out and enters S6.
If the determination condition P3 is yes, the process proceeds to P3S 2: preferably, the year unit blocks form a group of adorable year unit blocks for carrying out grouping and combination calculation, finally, a group of year unit blocks with the average grade closest to the average grade of the section in the X group is taken out, and then the step S6 is carried out;
after S6, entering the determination condition P4;
determination condition P4: considering all the annual cell blocks in the optimal ore blending scheme of the annual cell blocks, and judging whether the number of newly divided annual cell blocks capable of mining is greater than or equal to the number of the mining scrapers;
the judgment condition P4 indicates that the newly divided adorable year cell block is accepted, and the process proceeds to S5;
if the determination condition P4 is no, the process proceeds to S7;
s7: completing annual cell block ore distribution, wherein the result formed by all annual cell blocks in the annual cell block optimal ore distribution scheme is the annual cell block optimal ore distribution scheme;
the recovery sequence of the unit blocks of each group is the judgment sequence;
the segment has residual annual cell blocks which do not participate in the ore blending scheme and is recombined with the pseudo annual cell blocks;
the third step: and (2) sub-process: ore proportioning of unit block for mining
S8, sequentially taking out the annual cell blocks in each group in the optimal ore blending scheme of the annual cell blocks according to the stoping sequence, and taking out one group of annual cell blocks at a time;
s9, dividing the recoverable cell block in the group year cell block;
the dividing method comprises the following steps: respectively calculating the width sum of each row of the stoping unit blocks in each year unit block, then sorting the results from large to small, sequentially comparing the numerical values of two adjacent rows, if the difference value between the row and the next row is greater than the stoping safety distance, stopping comparison, taking out the row and all the stoping unit blocks in the front row, wherein the stoping unit block of the top plate of the row in which the row is located is the stopable unit block;
s10, carrying out grouping combination calculation on the stopable unit blocks among the year unit blocks of each group, wherein the number of the stopable unit blocks of each group is equal to the number of scrapers working simultaneously, and each stopable unit block is from different year unit blocks;
after S10, entering the determination condition P5;
determination condition P5: judging whether the number of the newly divided stoppable unit blocks is more than or equal to the number of the simultaneous mining scrapers or not, regardless of all stoppable unit blocks in the optimal ore allocation scheme of the stoppable unit blocks;
the determination condition P5 is: accepting the newly divided stoppable cell blocks to proceed to S10;
if the determination condition P5 is no, the process proceeds to S11;
s11: completing ore blending of the mining unit blocks in the unit blocks of the group year to obtain an optimal ore blending scheme of the mining unit blocks in the unit blocks of the group year; the stoping sequence of the stoping unit blocks is the judged sequence;
after S11, entering the determination condition P6;
determination condition P6: judging whether the next group of annual cell blocks exist in the optimal ore blending scheme of the annual cell blocks;
the determination condition P6 is: taking out the next group of the annual cell blocks according to the stoping sequence of the optimal ore blending scheme of the annual cell blocks, and entering S9;
if the determination condition P6 is no, the process proceeds to S12;
s12: completing ore blending of all the mining unit blocks in the annual unit block optimal ore blending scheme to obtain an optimal ore blending scheme of the mining unit blocks;
the stoping sequence of the stoping unit blocks is the judged sequence;
the fourth step: subflow 3: pseudo-year unit block ore blending
S13: recombining the residual pseudo-year unit blocks which do not participate in ore blending to form a plurality of new combined year unit blocks;
the number of the stoping unit blocks in the new combined year unit block is equal to the number of the stoping unit blocks in the year unit block; if only the pseudo year unit blocks remain, the number of the extraction unit blocks in the new combined year unit block may be less than the number of the extraction unit blocks in the year unit block;
the pseudo-year cell blocks in the ore blocks where the residual year cell blocks which do not participate in ore blending do not participate in the recombination, and the pseudo-year cell blocks can participate in the recombination only after the year cell blocks in the ore blocks participate in the ore blending;
after S13, entering the determination condition P7;
determination condition P7: judging whether the sum of the new combined year unit blocks and the residual year unit blocks is larger than or equal to the number of the scraper machines working simultaneously;
if the determination condition P7 is yes, the process proceeds to S14;
s14: because the length of the new combined year unit block is larger than that of one ore block, the new combined year unit block needs to be assigned to a certain ore block in order to divide the mineable year unit block conveniently;
s15: the sub-process 1 is operated: ore blending of annual cell blocks;
s16: and (3) operating a sub-process 2: mining unit block ore proportioning, and then entering S13;
if the determination condition P7 is no, the process proceeds to S17;
s17: completing ore blending of the pseudo-year unit blocks to obtain an optimal ore blending scheme of the unit blocks participating in ore blending and mining in the step; the stoping sequence of the stoping unit blocks is the judged sequence;
the fifth step: the sectional ore blending is completely finished, and the stoping sequence obtained by all the stoping unit blocks participating in the ore blending is the optimal ore blending scheme; the remaining mining unit blocks which do not participate in ore blending of the subsection and the lower subsection mining unit block are blended together;
and arranging the scraper to carry out corresponding mining unit blocks according to the optimal ore blending scheme in the mine.
Preferably, in S5, the number of the scrapers working simultaneously is 2-10.
Preferably, the extraction safety distance in S9 is 1-6 times the width of the extraction unit block.
Preferably, the calculation method for grouping and combining the recoverable unit blocks among the group of year unit blocks in S10 is as follows:
the group of year unit blocks consists of 2 year unit blocks;
calculating the average grade of all the stopable unit blocks in the annual unit block, then calculating the difference value between each stopable unit block and the average grade, finding out the stopable unit block with the largest absolute value of the difference value, namely M, then finding out the stopable unit block N with the average grade closest to the average grade of the stopable unit block after being combined with the stopable unit block M in the other annual unit block, and forming a group of stopable unit blocks M and N into an optimal ore matching scheme of the stopable unit blocks to form a group of stopable unit blocks in the optimal ore matching scheme of the stopable unit blocks.
Preferably, in S10, the second calculation method for performing grouping combination calculation on the recoverable cell block among the year unit blocks of the group is:
the group of year unit blocks consists of 3 year unit blocks;
calculating the average grade of all the stopable unit blocks in the unit blocks of the group year, then calculating the difference value between each stopable unit block and the average grade, finding out the stopable unit block with the largest absolute value of the difference value, namely O, then respectively finding out one stopable unit block in the other two unit blocks of the group year, namely P and R, enabling the average grade after O, P and R are combined to be closest to the average grade of the stopable unit block of the group, and then dividing the stopable unit blocks O, P and R into an optimal ore matching scheme of the stopable unit blocks to form a group of stopable unit blocks in the optimal ore matching scheme of the stopable unit blocks.
Preferably, the third calculation method for grouping, combining and calculating the recoverable unit blocks among the year unit blocks in the group in S10 is:
the group of year unit blocks consists of 4 year unit blocks and more than 4 year unit blocks;
firstly, dividing the group of year unit blocks into a group consisting of a plurality of 2 or 3 year unit blocks, and the dividing and calculating method comprises the following steps: the divided average grade of each group is closest to the average grade of the annual unit block; and then each group is calculated by using the method I or the method II respectively to obtain respective optimal stopable unit block combination, and finally all results are combined and then divided into the optimal ore blending scheme of the stoping unit blocks to form a group of stoping unit blocks in the optimal ore blending scheme of the stoping unit blocks.
The ore blending method has the beneficial effects that the quality problem of the produced ore can be effectively solved, the stability of the ore selection grade is ensured, and the production cost of a selection plant is reduced; the ore blending method can also improve the management benefit of the stoping work, effectively reduce the mixing rate of the waste rocks, improve the ore stoping rate and increase the output of the concentrate, thereby improving the economic benefit of enterprises; meanwhile, by the ore blending method, the underground recovery work can be guaranteed to be mined according to a reasonable sequence, the safety of the underground recovery work is effectively guaranteed, and the safety benefit of enterprises is improved.
Drawings
Fig. 1 is a plan view of the block and mining unit division of the present invention.
Fig. 2 is a plan view of ore blending of year unit blocks in the invention.
Fig. 3 is a top view of a mining unit block for mining according to the present invention.
Fig. 4 is a plan view of a pseudo-year cell block ore blending of the present invention.
Fig. 5 is a main flow diagram of the ore-blending scheme of the present invention.
FIG. 6 is a block diagram of ore blending according to the present invention.
Fig. 7 is a flow chart of ore blending of a mining unit block of the present invention.
FIG. 8 is a pseudo-year cell block ore blending flow chart of the present invention.
In the figure: 1. the method comprises the following steps of (1) connecting a gallery outside a footwall, 2. a mining area drop shaft, 3. an approach, 4. a cutting roadway, 5. a stoping unit block, 6. a year unit block, 7. a pseudo year unit block and 8. a new year unit block.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 8, the ore blending method of the sill pillar-free sublevel caving method with vertically arranged approach of the invention is characterized by comprising the following steps:
the first step is as follows: initializing;
s1, dividing 3 ore blocks into A, B ore blocks and C ore blocks along the direction of the ore body; the length of each ore block is 100m, the width of each ore block is the actual width of an ore body, the stage height of each ore block is 180m, the section height is 18m, the route interval is 20m, and each ore block is provided with a mining area ore pass 2 in an extravenal connecting channel 1; meanwhile, the number of the working carry scraper is 2;
s2, dividing the mining unit block 5 in the ore block, wherein the length of the mining unit block 5 is 20m, the width of the mining unit block 5 is 3m, the size of the mining unit block 5 is insufficient, the length is still divided according to 20m, and the width is the residual actual width; each mining unit block 5 contains its own grade, ore quantity and impurity attributes;
principle of dividing the size of one extraction unit block 5: the ore amount of the mining unit block 5 can meet the workload of one scraper in one day;
the purpose of dividing the extraction unit block 5 is to facilitate the compilation of the production ore blending daily plan;
s3, on the basis of the extraction unit block 5, a plurality of extraction unit blocks 5 form a year unit block 6 again, and the forming method comprises the following steps: dividing the ore blocks in the sequence from the upper plate cutting roadway 4 to the lower plate, and forming 15 mining unit blocks 5 into a year unit block 6, wherein the year unit block 6 is 100m long and 9m wide; the part of the ore block which is less than 15 residual mining unit blocks 5 is composed of a pseudo-year unit block 7, the length of the pseudo-year unit block is 100m, and the width of the pseudo-year unit block is the residual actual width; each year unit block 6 and pseudo year unit block 7 contains respective average grade, ore quantity and impurity attributes;
principle of 6 size of unit block of one year: the ore amount of the annual cell blocks 6 can meet the 15-day workload of one scraper;
purpose of the composition year unit block 6: firstly, the ore blending efficiency is improved, because thousands of mining unit blocks 5 need to be mined in one year in a mine, when an annual ore blending scheme is formulated, thousands of mining unit blocks 5 are blended at the same time, and the current computer running capacity runs for several days or even several weeks, so that in order to shorten the operation time of ore blending, after a plurality of mining unit blocks 5 form one annual unit block 6, the annual ore blending scheme is carried out among dozens of annual unit blocks 6, and the ore blending efficiency is greatly improved; secondly, the production year ore blending plan and the monthly ore blending plan are convenient to compile;
the second step is that: subflow 1: the year unit block 6 is used for ore blending, and the flow chart is shown in detail in FIG. 6;
s4, dividing the mining-capable year cell blocks, wherein the mining-capable year cell blocks are year cell blocks 6 which are most disc-free and participate in ore blending in each ore block, and all the mining-capable year cell blocks divided in the section are used as necessary conditions for the next calculation;
as shown in FIG. 2, the mining-capable year cell blocks are respectively found out from A, B and C ore blocks to form a group, the mining-capable year cell blocks found out in the 1 st grouping are respectively A-L1: 34.2%, B-L1: 35.7%, C-L1: 34.5%, and the rest groupings are determined again after the group results are calculated;
s5, performing group grouping combination on all the divided mining year cell blocks, wherein the number of the scrapers working at the same time is 2, so that after the group of mining year cell blocks are subjected to group grouping combination, a group of year cell blocks 6 with the average grade closest to the average grade of 34.5% of the section in the group 3 can be obtained, the results are shown in the following table, and a group of year cell blocks 6 with the average grade closest to the average grade of 34.5% of the section in the group 3 are taken out, the results are A-L1 and C-L1, the average grade after combination is 34.35%, and the difference between the average grade and the average grade of 34.5% of the section is-0.15;
after S5, the processing proceeds to decision condition P1: judging whether the stoping distance between the newly divided mineable year cell blocks is larger than the width of one year cell block 6 after the stoping of the group of year cell blocks 6 is finished;
if the determination condition P1 is no, the process proceeds to S6;
s6, naming the group of year unit blocks 6 as an N1 group, dividing the year unit blocks 6 into the optimal ore blending scheme of the year unit blocks 6 to form a group of year unit blocks 6 in the optimal ore blending scheme of the year unit blocks 6;
if the determination condition P1 is YES, the process proceeds to the determination condition P2;
determination condition P2: determining whether the stope distance between the mineable year cell blocks in S4 has been greater than the width of one year cell block 6;
if the judgment condition P2 is not met, entering P2S1, namely selecting a group of annual cell blocks 6 with average grade superior to the average grade of the group of the X components, and then entering the judgment condition P1;
if the determination condition P2 is yes, the process proceeds to P2S 2: redefining the collectable year cell block 6 having the highest stoping distance smaller than the width of the year cell block 6 as a preferred year cell block on the basis of the collectable year cell block having the highest disk position among the collectable year cell blocks, and entering a determination condition P3;
determination condition P3: judging whether the number of the preferred annual unit blocks is more than or equal to the number of the scraper working at the same time;
if the determination condition P3 is NO, the process proceeds to P3S 1: preferably, the year cell blocks are respectively grouped and combined with other collectable year cell blocks for calculation, and finally, a group of year cell blocks with the average grade closest to the average grade of the section in the X group is taken out and enters S6.
If the determination condition P3 is yes, the process proceeds to P3S 2: preferably, the year unit blocks form a group of adorable year unit blocks for carrying out grouping and combination calculation, finally, a group of year unit blocks with the average grade closest to the average grade of the section in the X group is taken out, and then the step S6 is carried out;
after S6, entering the determination condition P4;
determination condition P4: considering all the year cell blocks 6 which are divided into the year cell block 6 optimal ore blending scheme, and then judging whether the number of the newly divided mined year cell blocks is more than or equal to the number of the scrapers working simultaneously;
the determination condition P4 is: receiving the newly divided adorable year cell blocks, and proceeding to S5;
if the determination condition P4 is no, the process proceeds to S7;
the newly divided adolescent cell blocks are A-L2: 34.5%, B-L1: 35.7%, C-L2: 32.5%, the number of the cell blocks is more than the number of 2 carry-scraper, and then the step is carried out S5; and so on, the step S7 is carried out until the number of the annual mining unit blocks is less than the number of 2 scrapers;
s7: completing ore matching of the annual cell blocks 6, wherein results N1 th group to N9 th group consisting of all the annual cell blocks 6 in the optimal ore matching scheme of the annual cell blocks 6 are the optimal ore matching scheme of the annual cell blocks 6; the specific division results of groups N1 to N9 are shown in FIG. 2;
mining the unit blocks 6 of each group according to the sequence of N1-N9;
the segment is left with year unit blocks 6 which do not participate in the ore blending scheme and are recombined with pseudo year unit blocks 7;
the third step: and (2) sub-process: ore proportioning of the mining unit block 5, and a flow chart is shown in detail in FIG. 7;
s8, sequentially taking out the annual cell blocks 6 in each group in the optimal ore proportioning scheme of the annual cell blocks 6 according to the stoping sequence from N1 to N9, and taking out a group of annual cell blocks 6 at a time;
s9, dividing recoverable unit blocks in the N1 groups of year unit blocks 6;
the dividing method comprises the following steps: respectively calculating the width sum of each row of the stoping unit blocks 5 in each year unit block 6, then sequencing the results from large to small, sequentially comparing the numerical values of two adjacent rows, if the difference value between the row and the next row is greater than the stoping safety distance, stopping comparison, taking out the row and all the stoping unit blocks 5 in the front row, wherein the stoping unit block 5 on the top plate of the row in which the row is located is the stopable unit block; the results of the partition of the recoverable unit blocks are given in the following table, the average grade of this group of results being 34.34%:
s10, carrying out grouping combination calculation on the stopable unit blocks among the N1 th group of year unit blocks 6, wherein the number of the stopable unit blocks in each group is equal to the number of scrapers working simultaneously, and each stopable unit block is from different year unit blocks; because the number of the scrapers working simultaneously is 2, each group consists of 2 extraction unit blocks 5, and each extraction unit block 5 is from different annual unit blocks 6; the first calculation method comprises the following steps:
a group of year unit blocks 6 consists of 2 year unit blocks 6;
and calculating the average grade of all the stopable unit blocks in the unit blocks 6, then calculating the difference value between each stopable unit block and the average grade, and finding out the stopable unit block with the largest absolute value of the difference value, namely M. Then, a stopable unit block N with the average grade closest to the average grade of the stopable unit block group after being combined with the stopable unit block M is found out in the other annual unit block 6, and the stopable unit block M and the stopable unit block N form a group of optimal ore matching schemes which are divided into the stopable unit block 5 to become a group of stopable unit blocks 5 in the optimal ore matching schemes of the stopable unit block 5;
the second method comprises the following steps: a group of year unit blocks 6 is composed of 3 year unit blocks 6;
and calculating the average grade of all the stopable unit blocks in the annual unit block 6, then calculating the difference value between each stopable unit block and the average grade, and finding out the stopable unit block with the largest absolute value of the difference value, namely O. Then, one stopable unit block, namely P and R, is found out from the other two year unit blocks 6 respectively, the average grade after the combination of O, P and R is closest to the average grade of the stopable unit block, and then the stopable unit blocks O, P and R are divided into the optimal ore proportioning scheme of the stopable unit block 5, so that the stopable unit blocks 5 in the optimal ore proportioning scheme of the stopable unit block 5 are formed;
the third method comprises the following steps: a group of year unit blocks 6 is composed of 4 and more year unit blocks 6;
the group year cell block 6 is firstly divided into a group consisting of a plurality of 2 or 3 year cell blocks 6, and the dividing and calculating method comprises the following steps: the divided average grade of each group is closest to the average grade of the annual cell block 6; then each group is calculated by using the method one or the method two respectively to obtain respective optimal stopable unit block combination, and finally all results are combined and then divided into the optimal ore blending scheme of the stoping unit block 5 to form a group of stoping unit blocks 5 in the optimal ore blending scheme of the stoping unit block 5;
the difference calculation results are shown in the following table, and the calculation results show that the value-0.74 of N1_ A-L1-K4 is the maximum absolute value, and therefore is M; in addition, the average grade of the combination of N1_ C-L1-K2 and M is 34.25 percent which is close to the average grade of 34.34 percent of the recoverable unit blocks, so N1_ C-L1-K2 is N; therefore, N1_ A-L1-K4 and N1_ C-L1-K2 are divided into the optimal ore matching scheme of the mining unit blocks 5, and become a group of mining unit blocks 5 in the optimal ore matching scheme of the mining unit blocks 5;
after S10, entering the determination condition P5;
determination condition P5: judging whether the number of the newly divided stoppable unit blocks is more than or equal to the number of the simultaneous mining scrapers or not, without considering all the stoppable unit blocks 5 in the optimal ore allocation scheme of the stoppable unit blocks 5;
the repartitioned stopable cell blocks are shown in the following table,
the determination condition P5 is: the number of the stoppable cell blocks is more than or equal to 2 scraper, the newly divided stoppable cell blocks are received, and then the step S10 is carried out;
determination condition P5 is no: if the number is less than the number of 2 scrapers, the process goes to S11;
s11: at the moment, the ore blending of the mining unit blocks 5 in the N1 group year unit blocks 6 is completed, and the optimal ore blending scheme of the mining unit blocks 5 in the N1 group year unit blocks 6 is obtained; the stoping sequence of the stoping unit blocks 5 is A1C 1-A15C 15; the specific division results of A1C 1-A15C 15 are shown in detail in FIG. 3;
after S11, entering the determination condition P6;
determination condition P6: judging whether a next group of year cell blocks N2-N9 exist in the optimal ore blending scheme of the year cell block 6;
the determination condition P6 is: taking out the next group of year cell blocks, and entering S9;
if the determination condition P6 is no, the process proceeds to S12;
s12: completing ore blending of all the mining unit blocks 5 in the optimal ore blending scheme of the annual unit blocks 6 to obtain the optimal ore blending scheme of the mining unit blocks 5;
the fourth step: subflow 3: pseudo-year cell block 7 ore blending, the flow chart is detailed in figure 8;
s13: recombining the residual pseudo year unit blocks 7 which do not participate in ore blending to form 2 new combined year unit blocks 8, wherein each new combined year unit block 8 consists of 14 recovery unit blocks 5;
the number of the extraction unit blocks 5 in the new combined year unit block 8 is equal to the number of the extraction unit blocks 5 in the year unit block 6; if only the pseudo year unit blocks 7 remain, the number of the extraction unit blocks 5 in the new combined year unit block 8 may be less than the number of the extraction unit blocks 5 in the year unit block 6;
the combination mode is as follows: the W1 of the A ore block and the W2(1) of the B ore block are combined to form 14 stoping unit blocks 5, namely A _ CW 1; the W2(2) of the B ore block and the W3(1) of the C ore block are combined to form 14 stoping unit blocks 5, namely B _ CW 2;
the pseudo-year cell blocks 7 in the ore blocks where the residual year cell blocks 6 which do not participate in ore blending do not participate in the recombination, and the pseudo-year cell blocks 7 can participate in the recombination only after the year cell blocks 6 in the ore blocks participate in the ore blending;
after S13, entering the determination condition P7;
determination condition P7: judging whether the sum of the new combined year unit block 8 and the residual year unit block 6 is more than or equal to the number of 2 scrapers;
if the determination condition P7 is yes, the process proceeds to S14;
s14: because the length of the new combined year unit block 8 is greater than that of one ore block, in order to divide the mineable unit blocks, the new combined year unit block 8 needs to be assigned to a certain ore block;
attributing A _ CW1 to an A ore block and attributing B _ CW2 to a B ore block;
s15: the sub-process 1 is operated: 6, ore blending in a year unit block;
s16: and (3) operating a sub-process 2: ore blending is carried out on the mining unit block 5, and then the step S13 is carried out;
if the determination condition P7 is no, the process proceeds to S17;
17: completing ore blending in a pseudo-year unit block 7 to obtain an optimal ore blending scheme of the unit block 5 participating in ore blending and mining in the step; the stoping sequence of the stoping unit blocks 5 is BB1DD1 to BB14DD 14; the detailed division results of BB1DD 1-BB 14DD14 are detailed in fig. 4;
the fifth step: the ore blending of the subsection is completely finished, and the stoping sequence A1C 1-BB 14DD14 obtained by all the stoping unit blocks 5 participating in the ore blending is the optimal ore blending scheme; the remaining mining unit blocks SY 1-SY 2 which do not participate in ore blending in the subsection are blended with the mining unit block 5 in the next subsection;
and arranging 2 scrapers to carry out mining unit block mining according to the mining sequence from A1C1 to BB14DD14 on the mine according to the optimal ore blending scheme.
Claims (6)
1. An ore blending method for a sill pillar-free sublevel caving method with a vertically arranged approach is characterized by comprising the following steps:
the first step is as follows: initialization
S1, dividing ore blocks along the trend of the ore body, wherein the length of each ore block is 60-400 m, the width of each ore block is the actual width of the ore body, the stage height of each ore block is 60-180 m, the stage height is 10-30 m, the route interval is 10-30 m, and each ore block is provided with a mining area ore pass outside the vein;
s2, dividing mining unit blocks in the ore block, wherein the length of the mining unit blocks is 10 m-30 m, the ore caving thickness of the wide mine during one-time mining is 1.5 m-4 m, the length is still divided according to 10 m-30 m when the size of the mining unit blocks is insufficient, and the width is the residual actual width; each mining unit block comprises respective grade, ore quantity and impurity attribute;
s3, on the basis of the extraction unit blocks, a year unit block is formed by a plurality of extraction unit blocks again, and the forming method comprises the following steps: dividing in respective ore blocks according to the sequence from an upper plate cutting roadway to a lower plate, and forming 10-30 mining unit blocks into annual unit blocks; the residual mining unit blocks in the ore block are not enough to form a part of a year unit block, and form a pseudo year unit block; each year unit block and each pseudo year unit block contain respective average grade, ore quantity and impurity attribute;
the second step is that: subflow 1: annual cell block ore blending
S4, dividing the mining-capable year cell blocks, wherein the mining-capable year cell blocks are year cell blocks which are not participated in ore matching in each ore block at the top disk, and all the mining-capable year cell blocks divided in the section are used as necessary conditions for the next calculation;
s5, performing group grouping combination on all the divided collectable year cell blocks to obtain an X group result, and taking out a group of year cell blocks with the average grade closest to the average grade of the section in the X group;
the number of the annual cell blocks in each group in the X group is equal to the number of the scraper which works simultaneously, and each annual cell block which can be mined comes from different ore blocks;
after S5, the processing proceeds to decision condition P1: judging whether the stoping distance between the newly divided mineable year cell blocks is larger than the width of one year cell block or not after the stoping of the group of year cell blocks is finished;
if the determination condition P1 is no, the process proceeds to S6;
s6, dividing the group of year unit blocks into a year unit block optimal ore blending scheme to form a group of year unit blocks in the year unit block optimal ore blending scheme;
if the determination condition P1 is YES, the process proceeds to the determination condition P2;
determination condition P2: determining whether the stope distance between mineable year cell blocks in S4 has been greater than the width of one year cell block;
if the judgment condition P2 is not met, entering P2S1, namely selecting a group of annual cell blocks of which the average grade is superior to the average grade in the group of X component results, and then entering the judgment condition P1;
if the determination condition P2 is yes, the process proceeds to P2S 2: redefining the collectable year cell block with the highest disc position as a preferred year cell block together with the year cell block with the recovery distance smaller than the width of the year cell block based on the collectable year cell block, and entering a judgment condition P3;
determination condition P3: judging whether the number of the preferred annual unit blocks is more than or equal to the number of the scraper working at the same time;
if the determination condition P3 is NO, the process proceeds to P3S 1: preferably, the year cell blocks are respectively grouped and combined with other collectable year cell blocks for calculation, and finally, a group of year cell blocks with the average grade closest to the average grade of the section in the X group is taken out and enters S6.
If the determination condition P3 is yes, the process proceeds to P3S 2: preferably, the year unit blocks form a group of adorable year unit blocks for carrying out grouping and combination calculation, finally, a group of year unit blocks with the average grade closest to the average grade of the section in the X group is taken out, and then the step S6 is carried out;
after S6, entering the determination condition P4;
determination condition P4: considering all the annual cell blocks in the optimal ore blending scheme of the annual cell blocks, and judging whether the number of newly divided annual cell blocks capable of mining is greater than or equal to the number of the mining scrapers;
the determination condition P4 is: receiving the newly divided adorable year cell blocks, and proceeding to S5;
if the determination condition P4 is no, the process proceeds to S7;
s7: completing annual cell block ore distribution, wherein the result formed by all annual cell blocks in the annual cell block optimal ore distribution scheme is the annual cell block optimal ore distribution scheme;
the recovery sequence of the unit blocks of each group is the judgment sequence;
the segment has residual annual cell blocks which do not participate in the ore blending scheme and is recombined with the pseudo annual cell blocks;
the third step: and (2) sub-process: ore proportioning of unit block for mining
S8, sequentially taking out the annual cell blocks in each group in the optimal ore blending scheme of the annual cell blocks according to the stoping sequence, and taking out one group of annual cell blocks at a time;
s9, dividing the recoverable cell block in the group year cell block;
the dividing method comprises the following steps: respectively calculating the width sum of each row of the stoping unit blocks in each year unit block, then sorting the results from large to small, sequentially comparing the numerical values of two adjacent rows, if the difference value between the row and the next row is greater than the stoping safety distance, stopping comparison, taking out the row and all the stoping unit blocks in the front row, wherein the stoping unit block of the top plate of the row in which the row is located is the stopable unit block;
s10, carrying out grouping combination calculation on the stopable unit blocks among the year unit blocks of each group, wherein the number of the stopable unit blocks of each group is equal to the number of scrapers working simultaneously, and each stopable unit block is from different year unit blocks;
after S10, entering the determination condition P5;
determination condition P5: judging whether the number of the newly divided stoppable unit blocks is more than or equal to the number of the simultaneous mining scrapers or not, regardless of all stoppable unit blocks in the optimal ore allocation scheme of the stoppable unit blocks;
the determination condition P5 is: accepting the newly divided stoppable cell blocks to proceed to S10;
if the determination condition P5 is no, the process proceeds to S11;
s11: completing ore blending of the mining unit blocks in the unit blocks of the group year to obtain an optimal ore blending scheme of the mining unit blocks in the unit blocks of the group year; the stoping sequence of the stoping unit blocks is the judged sequence;
after S11, entering the determination condition P6;
determination condition P6: judging whether the next group of annual cell blocks exist in the optimal ore blending scheme of the annual cell blocks;
the determination condition P6 is: taking out the next group of the annual cell blocks according to the stoping sequence of the optimal ore blending scheme of the annual cell blocks, and entering S9;
if the determination condition P6 is no, the process proceeds to S12;
s12: completing ore blending of all the mining unit blocks in the annual unit block optimal ore blending scheme to obtain an optimal ore blending scheme of the mining unit blocks;
the stoping sequence of the stoping unit blocks is the judged sequence;
the fourth step: subflow 3: pseudo-year unit block ore blending
S13: recombining the residual pseudo-year unit blocks which do not participate in ore blending to form a plurality of new combined year unit blocks;
the number of the stoping unit blocks in the new combined year unit block is equal to the number of the stoping unit blocks in the year unit block; if only the pseudo year unit blocks remain, the number of the extraction unit blocks in the new combined year unit block may be less than the number of the extraction unit blocks in the year unit block;
the pseudo-year cell blocks in the ore blocks where the residual year cell blocks which do not participate in ore blending do not participate in the recombination, and the pseudo-year cell blocks can participate in the recombination only after the year cell blocks in the ore blocks participate in the ore blending;
after S13, entering the determination condition P7;
determination condition P7: judging whether the sum of the new combined year unit blocks and the residual year unit blocks is larger than or equal to the number of the scraper machines working simultaneously;
if the determination condition P7 is yes, the process proceeds to S14;
s14: because the length of the new combined year unit block is larger than that of one ore block, the new combined year unit block needs to be assigned to a certain ore block in order to divide the mineable year unit block conveniently;
s15: the sub-process 1 is operated: ore blending of annual cell blocks;
s16: and (3) operating a sub-process 2: mining unit block ore proportioning, and then entering S13;
if the determination condition P7 is no, the process proceeds to S17;
s17: completing ore blending of the pseudo-year unit blocks to obtain an optimal ore blending scheme of the unit blocks participating in ore blending and mining in the step; the stoping sequence of the stoping unit blocks is the judged sequence;
the fifth step: the sectional ore blending is completely finished, and the stoping sequence obtained by all the stoping unit blocks participating in the ore blending is the optimal ore blending scheme; the remaining mining unit blocks which do not participate in ore blending of the subsection and the lower subsection mining unit block are blended together;
and arranging the scraper to carry out corresponding mining unit blocks according to the optimal ore blending scheme in the mine.
2. The ore blending method of the sill pillar-free sublevel caving method with a vertically oriented route according to claim 1, wherein 2-10 scrapers are simultaneously operated in S5.
3. The ore proportioning method of the sill pillar-free sublevel caving method in a vertically oriented arrangement route according to claim 1, wherein the stoping safety distance in S9 is 1-6 times the width of a stopable unit block.
4. The ore proportioning method of the sill pillar-free sublevel caving method in a vertically oriented arrangement route according to claim 1, wherein the calculation method for grouping and combining the stopable cell blocks among the annual cell blocks in the group in S10 is as follows:
the group of year unit blocks consists of 2 year unit blocks;
calculating the average grade of all the stopable unit blocks in the annual unit block, then calculating the difference value between each stopable unit block and the average grade, finding out the stopable unit block with the largest absolute value of the difference value, namely M, then finding out the stopable unit block N with the average grade closest to the average grade of the stopable unit block after being combined with the stopable unit block M in the other annual unit block, and forming a group of stopable unit blocks M and N into an optimal ore matching scheme of the stopable unit blocks to form a group of stopable unit blocks in the optimal ore matching scheme of the stopable unit blocks.
5. The ore blending method of the sill pillar-free sublevel caving method with vertically-oriented route layout according to claim 1, wherein the second calculation method for grouping and combining the stopable cell blocks among the annual cell blocks in the group in S10 is:
the group of year unit blocks consists of 3 year unit blocks;
calculating the average grade of all the stopable unit blocks in the unit blocks of the group year, then calculating the difference value between each stopable unit block and the average grade, finding out the stopable unit block with the largest absolute value of the difference value, namely O, then respectively finding out one stopable unit block in the other two unit blocks of the group year, namely P and R, enabling the average grade after O, P and R are combined to be closest to the average grade of the stopable unit block of the group, and then dividing the stopable unit blocks O, P and R into an optimal ore matching scheme of the stopable unit blocks to form a group of stopable unit blocks in the optimal ore matching scheme of the stopable unit blocks.
6. The ore blending method of the sill pillar-free sublevel caving method in a vertically oriented route, according to claim 1, wherein the third calculation method of grouping and combining the stopable cell blocks among the annual cell blocks in the group in S10 is:
the group of year unit blocks consists of 4 year unit blocks and more than 4 year unit blocks;
firstly, dividing the group of year unit blocks into a group consisting of a plurality of 2 or 3 year unit blocks, and the dividing and calculating method comprises the following steps: the divided average grade of each group is closest to the average grade of the annual unit block; and then each group is calculated by using the method I or the method II respectively to obtain respective optimal stopable unit block combination, and finally all results are combined and then divided into the optimal ore blending scheme of the stoping unit blocks to form a group of stoping unit blocks in the optimal ore blending scheme of the stoping unit blocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010645140.XA CN111734411B (en) | 2020-07-07 | 2020-07-07 | Ore blending method of sill pillar-free sublevel caving method with vertically-arranged approach |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010645140.XA CN111734411B (en) | 2020-07-07 | 2020-07-07 | Ore blending method of sill pillar-free sublevel caving method with vertically-arranged approach |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111734411A true CN111734411A (en) | 2020-10-02 |
| CN111734411B CN111734411B (en) | 2021-08-24 |
Family
ID=72655399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010645140.XA Active CN111734411B (en) | 2020-07-07 | 2020-07-07 | Ore blending method of sill pillar-free sublevel caving method with vertically-arranged approach |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111734411B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533416A (en) * | 2014-12-25 | 2015-04-22 | 中冶北方（大连）工程技术有限公司 | Large-scale mechanized non-sill-pillar sub-level caving mining method for extremely thick ore body |
| CN104929644A (en) * | 2015-06-15 | 2015-09-23 | 武汉科技大学 | Method for arranging excavating plant working faces with multi-grade ore coexisting |
| CN107687341A (en) * | 2017-10-26 | 2018-02-13 | 中冶北方（大连）工程技术有限公司 | A kind of Upward slicing point pillar filling mining method of extremely thick big unstable ore body |
| CN107780938A (en) * | 2016-08-30 | 2018-03-09 | 丹东东方测控技术股份有限公司 | A kind of method for realizing opencut excavating equipment control ore mine grade |
| CN108590652A (en) * | 2018-05-09 | 2018-09-28 | 中冶北方（大连）工程技术有限公司 | A kind of sublevel caving method without sill pillar dividing a nugget along orebody trend |
| CN109763824A (en) * | 2019-01-24 | 2019-05-17 | 本钢板材股份有限公司 | A kind of satellite positioning dynamic ore-proportioning method |
| CN110700836A (en) * | 2018-07-09 | 2020-01-17 | 扎兰屯市国森矿业有限责任公司 | Complex lead-zinc mine ore zoning, separate mining, sorting comprehensive development and utilization process |
-
2020
- 2020-07-07 CN CN202010645140.XA patent/CN111734411B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533416A (en) * | 2014-12-25 | 2015-04-22 | 中冶北方（大连）工程技术有限公司 | Large-scale mechanized non-sill-pillar sub-level caving mining method for extremely thick ore body |
| CN104929644A (en) * | 2015-06-15 | 2015-09-23 | 武汉科技大学 | Method for arranging excavating plant working faces with multi-grade ore coexisting |
| CN107780938A (en) * | 2016-08-30 | 2018-03-09 | 丹东东方测控技术股份有限公司 | A kind of method for realizing opencut excavating equipment control ore mine grade |
| CN107687341A (en) * | 2017-10-26 | 2018-02-13 | 中冶北方（大连）工程技术有限公司 | A kind of Upward slicing point pillar filling mining method of extremely thick big unstable ore body |
| CN108590652A (en) * | 2018-05-09 | 2018-09-28 | 中冶北方（大连）工程技术有限公司 | A kind of sublevel caving method without sill pillar dividing a nugget along orebody trend |
| CN110700836A (en) * | 2018-07-09 | 2020-01-17 | 扎兰屯市国森矿业有限责任公司 | Complex lead-zinc mine ore zoning, separate mining, sorting comprehensive development and utilization process |
| CN109763824A (en) * | 2019-01-24 | 2019-05-17 | 本钢板材股份有限公司 | A kind of satellite positioning dynamic ore-proportioning method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111734411B (en) | 2021-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111550244B (en) | Mining method for layered strips of gently inclined ore body | |
| CN111734411B (en) | Ore blending method of sill pillar-free sublevel caving method with vertically-arranged approach | |
| CN101424186A (en) | Method for recovering disc ore on incline ore block | |
| CN112031770B (en) | Novel mining method suitable for multi-stope synchronous mining of thick and large ore body | |
| AU2018378009B2 (en) | Mine field layout method suitable for fluidized mining of coal resources | |
| Bakhtavar | Transition from open-pit to underground in the case of Chah-Gaz iron ore combined mining | |
| Rysbekov et al. | Mine planning subject to prepared ore reserves rationing | |
| CN114427463B (en) | Deep deposit downward approach type plate area partition unloading layering advanced pressure relief stoping method | |
| Mustapaevich et al. | Underground mine mining systems and technological parameters of mine development | |
| CN108222940A (en) | A kind of recovery method of manganese ore | |
| CN102943673A (en) | Cutting method combining deep hole cutting and small well cutting | |
| CN104281134A (en) | System and method for optimizing multiple production indexes in sorting process of raw ore based on man-machine interaction | |
| Mijalkovski et al. | Mining method selection for underground mining with the application of VIKOR method | |
| CN102174891B (en) | Matching method for mechanized mining equipment | |
| CN215108903U (en) | Stope structure for mining medium-thickness inclined phosphate ore by layers | |
| CN110700836A (en) | Complex lead-zinc mine ore zoning, separate mining, sorting comprehensive development and utilization process | |
| Abdollahisharif et al. | Open-Pit to Underground Mining Г Where Is the Optimum Transition Depth? | |
| RU2642193C1 (en) | Method for developing horizontal and lower ore bodies of average capacity | |
| CN103382841B (en) | Low dilution ore-drawing quantitative control methodin under covering layer | |
| CN113090265A (en) | Novel 90m high and middle section fan-shaped deep hole stoping method | |
| CN108547615B (en) | Method for mining in complex ore body group by using trackless equipment | |
| Vladimirovich | IMPROVING THE EFFICIENCY OF PRODUCTION PROCESS AND SHIPPING ORE ON THE BASIS OF THE USE OF SELF-PROPELLED LOAD-DELIVERY MACHINES TECHNOLOGY | |
| RU2809852C1 (en) | Method for exploration and development of deposits with nested mineralization | |
| Kosenko | Increase of efficiency of technological process of ore drawing and delivery of ore mass at development of deposits of natural-rich iron ores on large depths | |
| CN111927460B (en) | Thick ore body mining method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |