CN114215519B - Multi-scheme combined mining method for thick ore body with steep inclination of thickness change - Google Patents
Multi-scheme combined mining method for thick ore body with steep inclination of thickness change Download PDFInfo
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- CN114215519B CN114215519B CN202111442413.1A CN202111442413A CN114215519B CN 114215519 B CN114215519 B CN 114215519B CN 202111442413 A CN202111442413 A CN 202111442413A CN 114215519 B CN114215519 B CN 114215519B
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- 238000005065 mining Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005422 blasting Methods 0.000 claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 15
- 238000007598 dipping method Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 7
- 210000003462 vein Anatomy 0.000 abstract 3
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 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
- E21C41/16—Methods of underground mining; Layouts therefor
Abstract
The invention relates to a multi-scheme combined mining method for a thick ore body with a steep inclination thickness, which comprises the following steps: dividing sectional heights, wherein a lower vein outer transportation lane is adopted in the middle section, a vein penetrating lane is adopted for exploring and arranging a rock drilling lane when the thickness is more than or equal to 15m, and a vein following lane is adopted for exploring and arranging the rock drilling lane when the thickness of a ore body is less than 15 m; reserving 15m studs; dividing a coordinate grid line; thirdly, when the thickness of the recovered ore body near the ore pillar is more than 15m, arranging medium-length holes in a vertical trend, firstly constructing and cutting a raise, then arranging and cutting medium-length holes in a row, and then arranging a normal recovery medium-length hole row surface in the vertical trend; when the thickness of the recovered ore body among the ordinate lines of the segmented inner coordinate grid lines is less than 15m, arranging medium-deep holes along the trend, constructing and cutting the courtyard on the ore body of the middle drift roadway, arranging and cutting the medium-deep holes along the drift, and arranging the normal recovered medium-deep hole row surfaces along the trend; and (5) blasting to recover ore bodies. The invention can improve the recovery rate of mining and reduce the dilution rate.
Description
Technical Field
The invention relates to the technical field of mining, in particular to a multi-scheme combined mining method for a thick ore body with a steep inclination thickness.
Background
The steep thick ore body is an ore body with the inclination angle of more than 55 degrees and the thickness of 10-15-40 m. At present, the mining of the steep and thick ore body generally adopts a segmented ore room method, a staged ore room method, a non-bottom column segmented caving method, a staged caving method, a subsequent filling method and the like, and the methods are conventional mining methods and have limited applicability to the steep and thick ore body with thickness change in practical application.
When the ore body changes, if the vertical trend arrangement medium-length hole stoping is adopted singly, when the ore body is narrowed, the ratio of the mining standard engineering to the cutting engineering is overlarge, the unit cost of mining is increased, the mining is uneconomical, and the depletion loss rate is high when the dip angle is smaller; if only adopting to arrange the medium-length hole stoping along trend, when the ore body is thick, big gun hole length overlength, equipment drilling depth is limited, and drilling efficiency is lower, and big gun hole skew is serious, and bottom bulk ratio increases, is unfavorable for stoping.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-scheme combined mining method for a thick ore body with a steep inclination thickness change, which is capable of improving the mining recovery rate and reducing the depletion rate.
In order to solve the problems, the multi-scheme combined mining method for the thick ore body with the steep inclination of the thickness change comprises the following steps:
dividing sectional heights by 10-16 m according to the middle section height of a mine and the rock drilling capacity of equipment, wherein the middle section adopts a lower-wall extra-pulse transport roadway, and adopts pulse-through roadway mining and rock drilling roadway arrangement when the thickness is more than or equal to 15m in combination with the reality of a steep medium-thickness ore body, and adopts pulse-along roadway mining and rock drilling roadway arrangement when the thickness of the ore body is less than 15 m; reserving 15m studs according to geological condition intervals of 75m, 60m or 45 m;
secondly, dividing coordinate grid lines according to 20m intervals after development and mining standard engineering is finished according to ore body boundaries;
thirdly, when the thickness of the recovered ore body near the ore pillar is more than 15m, arranging medium-length holes in a vertical trend, firstly constructing and cutting a raise, then arranging and cutting medium-length holes, and then arranging normal recovered medium-length hole row surfaces in the vertical trend to form medium-length hole row surface lines;
when the thickness of the recovered ore body among the ordinate lines of the segmented inner coordinate grid lines is less than 15m, arranging medium-length holes along the trend, constructing and cutting the courtyard on the ore body of the middle drift roadway, arranging and cutting the medium-length holes along the drift, and arranging the normal recovered medium-length hole row surfaces along the trend to form medium-length hole row surfaces;
and (5) blasting to recover ore bodies.
The blasting principle is that during blasting, a cutting row firstly uses a cutting courtyard as a free surface and compensates space blasting, and then sequentially uses the space after the front row blasting as the free surface blasting; and the normal row sequentially blasts and recovers ore bodies by taking the cut grooves after the cut groove row blasting is completed as free surfaces.
Compared with the prior art, the invention has the following advantages:
1. according to the thickness of the ore body, medium-length hole stoping arranged along the trend is adopted when the thickness of the ore body is less than 15 m; when the thickness is more than or equal to 15m, the principle of vertical trend arrangement medium-length hole extraction is adopted, and the mining recovery rate is improved, the depletion rate is reduced, and the comprehensive recovery efficiency maximization of resources is realized by adopting a mode of combining vertical trend and trend arrangement in a mode of combining the vertical trend with the trend arrangement in the same section and different sections in combination with the thickness and inclination change of ore bodies (the trend arrangement tends to be along the trend when the inclination is smaller and the vertical trend arrangement tends to be carried out when the inclination is larger).
2. The method improves the limitation of the prior art method, strengthens the exploitation applicability to the thickness change of the ore body, reduces mine loss and depletion, brings remarkable economic benefit to the mine, is suitable for the steep-inclination thick ore body with the thickness change of the medium-length hole stoping, and can be used in caving method, empty-field method and filling method.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
FIG. 1 is a schematic plan view of a joint arrangement of vertical and along-the-line within a segment of the present invention.
FIG. 2 is a cross-sectional view of the invention A-A.
In the figure: 1-coordinate grid lines; 2-rock drilling tunnel; 3-ore body boundary; 4-a stud; 5-cutting the courtyard; 6-medium-length hole upper thread arrangement.
Detailed Description
A multi-scheme combined mining method for a thick ore body with a steep inclination of thickness, comprising the steps of:
dividing sectional heights by 10-16 m according to the middle section height of a mine and the rock drilling capacity of equipment, wherein the middle section adopts a lower-wall extra-pulse transport roadway, and adopts a pulse-through roadway mining and rock drilling roadway 2 arrangement when the thickness is more than or equal to 15m in combination with the reality of a steep medium-thickness ore body, and adopts a pulse-along roadway mining and rock drilling roadway 2 arrangement when the thickness of the ore body is less than 15 m; reserving 15m studs 4 according to geological condition intervals of 75m, 60m or 45 m;
secondly, dividing the coordinate grid lines 1 according to the distance of 20m after the exploitation and mining standard project is finished according to the ore body boundary line 3;
thirdly, when the thickness of the recovered ore body near the ore pillar is more than 15m, arranging medium-length holes in a vertical trend, firstly constructing and cutting the patio 5, then arranging and cutting medium-length holes in a row, and then arranging a normal recovered medium-length hole row surface in a vertical trend to form a medium-length hole row surface line 6;
when the thickness of the recovered ore body among the ordinate lines of the segmented inner coordinate grid lines 1 is less than 15m, medium-length holes are arranged along the trend, a cutting courtyard 5 is constructed on the upper disc of the ore body of the middle drift roadway, then the medium-length holes are arranged along the drift, and then the normal recovered medium-length hole row surface (the width is the thickness of the ore body) along the trend is arranged, so that a medium-length hole row surface line 6 is formed;
blasting and recovering ore bodies:
the blasting principle is that during blasting, the cutting row firstly uses the cutting courtyard (5) as a free surface and compensates space for blasting, and then sequentially uses the space after the front row blasting as the free surface for blasting; and the normal row sequentially blasts and recovers ore bodies by taking the cut grooves after the cut groove row blasting is completed as free surfaces.
The middle section exploitation engineering, the sectional mining engineering and the bottom structural arrangement of the mine are designed and implemented according to the mine practice, the related specifications and the design manual.
Example as shown in fig. 1, a multi-scheme combined mining method for a heavy-pitch thick ore body with a thickness variation includes the following steps:
dividing sectional heights by 10-16 m according to the middle section height of a mine and the rock drilling capacity of equipment, wherein the middle section adopts a lower-disc extra-pulse transport roadway, and adopts a pulse-through roadway mining and rock drilling roadway 2 arrangement when the thickness is more than or equal to 15m in combination with the reality of a steep medium-thickness ore body, and adopts a pulse-along roadway mining and rock drilling roadway 2 arrangement when the thickness of the ore body is less than 15 m; and 15m studs 4 are reserved according to geological condition intervals of 75m, 60m or 45 m.
And secondly, dividing the coordinate grid lines 1 according to the distance of 20m after the development and mining standard engineering is finished according to the ore body boundary line 3.
According to the method, as shown in fig. 1, in the section, the thickness of a recovered ore body is larger than 15m near a left ore pillar, medium-length holes are arranged in a vertical trend, firstly, a 2m multiplied by 3m cutting patio 5 is constructed, then medium-length holes with the cutting width of 5m are arranged, and then normal recovery medium-length hole row surfaces with the vertical trend and the width of 15m are arranged, so that a medium-length hole row line 6 is formed. The parameters are parameters when the technology is used for the first time, and the parameters can be adjusted by combining actual research similar to mines.
And recovering ore body thickness of less than 15m in the section as between the second ordinate line and the fifth ordinate line of the figure 1, adopting arrangement of medium-deep holes along the trend, constructing a cutting courtyard 5 with the width of 2m multiplied by 3m on the upper disc of the ore body of the middle drift channel, then arranging the cutting medium-deep holes with the width of 5m along the drift channel, and then arranging the normal recovery medium-deep hole row surface (the width is the ore body thickness) along the trend to form a medium-deep hole row line 6.
As shown in a schematic cross section in FIG. 2, the thicknesses of ore bodies in 13m sections and 23m sections are more than 15m, and the ore bodies are arranged in a vertical trend; the thickness of the 33m segmented ore body is less than 15m, and the segmented ore body is distributed along the trend.
When blasting is performed, the cutting row firstly uses the cutting patio 5 as a free surface and performs compensation space blasting, and then sequentially uses the space after blasting of the front row as the free surface blasting; and the normal row sequentially blasts and recovers ore bodies by taking the cut grooves after the cut groove row blasting is completed as free surfaces.
Claims (2)
1. A multi-scheme combined mining method for a thick ore body with a steep inclination of thickness, comprising the steps of:
dividing sectional heights by 10-16 m according to the middle section height of a mine and the rock drilling capacity of equipment, wherein the middle section adopts a lower-wall extra-pulse transport roadway, and adopts a pulse-through roadway mining and rock drilling roadway (2) arrangement when the thickness is more than or equal to 15m in combination with the practice of a steep medium-thickness ore body, and adopts a pulse-along roadway mining and rock drilling roadway (2) arrangement when the thickness of the ore body is less than 15 m; reserving 15m studs (4) according to geological condition intervals of 75m, 60m or 45 m;
secondly, dividing coordinate grid lines (1) according to 20m intervals after development and mining standard engineering is finished according to ore body boundary lines (3);
thirdly, when the thickness of the recovered ore body near the ore pillar is more than 15m, adopting a vertical trend to arrange medium-length holes, firstly constructing and cutting the patio (5), then arranging and cutting medium-length holes, and then arranging a vertical trend normal recovered medium-length hole row surface to form a medium-length hole row surface line (6);
when the thickness of the recovered ore body among the ordinate lines of the segmented inner coordinate grid lines (1) is less than 15m, medium-deep holes are arranged along the trend, a cutting patio (5) is constructed on the upper disc of the ore body of the middle drift channel, then medium-deep holes are arranged along the drift channel, and then normal recovered medium-deep hole row surfaces along the trend are arranged to form medium-deep hole row surfaces (6);
and (5) blasting to recover ore bodies.
2. A multi-scheme joint mining method for a thickness-varying steeply dipping thick ore body as claimed in claim 1, wherein: the blasting principle is that during blasting, a cutting row firstly uses a cutting courtyard (5) as a free surface and compensates space for blasting, and then the space after blasting of a front row is sequentially used as the free surface for blasting; and the normal row sequentially blasts and recovers ore bodies by taking the cut grooves after the cut groove row blasting is completed as free surfaces.
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| CN114215519B true CN114215519B (en) | 2023-11-07 |
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