CN115559744A - Bottom structure arrangement mode suitable for mining inclined and steeply inclined thin ore body - Google Patents
Bottom structure arrangement mode suitable for mining inclined and steeply inclined thin ore body Download PDFInfo
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- 238000005065 mining Methods 0.000 title claims abstract description 74
- 238000005553 drilling Methods 0.000 claims abstract description 90
- 239000011435 rock Substances 0.000 claims abstract description 62
- 238000005520 cutting process Methods 0.000 claims abstract description 18
- 238000007598 dipping method Methods 0.000 claims description 8
- 210000003462 vein Anatomy 0.000 claims description 7
- 230000005641 tunneling Effects 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims 4
- 238000000034 method Methods 0.000 abstract description 35
- 238000005422 blasting Methods 0.000 abstract description 14
- 238000004880 explosion Methods 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 description 5
- 238000007600 charging Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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Abstract
The invention discloses a bottom structure arrangement mode suitable for inclined and steeply inclined thin ore body mining.A top deep-hole rock drilling gallery (3) is tunneled along the trend of an ore body between top deep-hole rock drilling gallery connection galleries (2), and ore body sections between ore loading access roads (5) are communicated to form a lower middle-hole rock drilling gallery (6); drilling an upward pull-bottom middle hole (8) by adopting a middle hole drilling machine or a mining rock drilling trolley in a lower middle hole rock drilling gallery (6) by taking a cutting raise as a center; a cutting raise is used as a free surface in the upper deep hole rock drilling drift (3), and a mining rock drilling jumbo is adopted to drill a downward stoping deep hole (9); taking a cutting raise as a free surface, and carrying out lateral ore caving blasting on blast holes in a graded, segmented and row-by-row mode; after each explosion, a part or all of the caving ore (10) is shoveled and transported out of the stope by adopting shoveling and loading equipment in the ore loading access road (5). The method can greatly improve the mechanization degree and the mining efficiency of the mining of the steeply inclined thin ore body and obviously improve the safety condition of the mining.
Description
Technical Field
The invention belongs to the technical field of underground mining, and particularly relates to an efficient mining method for inclined and steeply inclined thin ore bodies with the ore body thickness of 0.8-4.5 m, which is used for replacing a shallow hole shrinkage method widely used at present for inclined and steeply inclined thin ore bodies.
Background
The shallow hole shrinkage method is a traditional mining method for mining inclined or steeply inclined thin ore bodies (< 5 m), and is still the main mining method for mining inclined or steeply inclined thin ore bodies in tungsten, gold and other mines in China at present. The length and height of the ore block are generally 40-60 m, and the width is the thickness of the ore body (the thickness is less than 5m, and most of the thickness is less than 2 m). During mining, a mining quasi-ventilation raise is firstly tunneled in the center of an ore block, then a bottom-drawing drift is tunneled at the bottom, and finally, mining is carried out upwards in a reverse-inclined mode. During stoping, with the increase of the height, the direct-path pedestrian patios are gradually erected on the two sides of the ore block (or the pedestrian ventilation patios are firstly tunneled on the two sides of the ore block before stoping, and a stope approach is tunneled in the patios every 4 m). The inclination angle of ore body is above 60-65 deg. generally, the ore rock is stable, the productive form is single, and it has no caking property and self-combustion property. The method is mainly characterized in that:
(1) The method is one of the empty field methods and has the common characteristics of the empty field method. It also divides the ore block into two steps of chamber and pillar for stoping. The chamber is mined firstly, and then the pillar is mined.
(2) This mining method workers work directly under the exposed face of the roof panel of the mine.
(3) The shallow hole shrinkage method is to stope the chamber from bottom to top layer by layer, and uses shallow hole to collapse thin ore.
(4) The ore mined each time is discharged from the hopper by about 1/3 of the weight of the ore, and 2/3 of the ore is left to be used as a temporary working platform for the next drilling and blasting work. When the chamber is completely emptied, 2/3 of the remaining ore is discharged (this is called a large ore drawing).
(5) The rock drill is operated by standing on the stockpile.
The mining work of the shallow hole shrinkage method comprises the following steps: rock drilling, explosive charging and blasting, ventilation, local ore drawing, wool prying, flat field, large-scale ore drawing and the like. Stoping of the chamber is carried out from bottom to top in layers, and the height of each layer is about 2-3 meters generally. Shallow hole ore caving is adopted. There are 2 types of rock drilling, i.e., up hole and horizontal hole. When the ore is more firm, upward holes are generally adopted, the rock drilling efficiency is high, workers can operate easily, but the workers work directly under the ore body subjected to vibration, the safety is poor, the working condition is poor (water flows downwards during rock drilling), and meanwhile, the number of times of changing a drill rod during rock drilling is large, so that the rock drilling efficiency is influenced. When the ore steadiness is poor, generally adopt the horizontal hole, the working face that forms after the drilling blasting is more level and smooth, and the during operation security is than better, and the drilling efficiency is than upwards the hole low, and it is more than upwards the hole to collapse the ore bold. In stopes currently mined by the shrinkage method in thin and extremely thin seams. Most employ an upward blasthole. The charge coefficient in the blast hole is not too small, and can preferably reach 60-70%. If the charging coefficient is too small, the explosive is unevenly distributed in the ore, and the large ore blocks which are broken down are more.
The shallow hole shrinkage method has the advantages of simple structure, convenience in management, smaller mining and cutting engineering quantity, lower ore loss and dilution, low mining cost and the like, but in the traditional shallow hole shrinkage method, personnel stand on a stope pile for drilling and blasting, and the upper part is a dead zone top plate. During operation, all personnel need to climb into a stope through the pedestrian crossroads and the patios at the two ends, and drilling machines, supporting materials and the like are carried to a working surface by manpower, so that the following defects exist:
(1) All the digging operations have low mechanization degree, large labor intensity of personnel and low efficiency;
(2) Most of the operation, personnel all operate under the empty roof of the stope, when the stability of the ore rock mass is poor, accidents such as rib stripping, roof collapse and the like are easy to happen, and the safety and reliability are poor;
(3) When the central ventilation patio is not available, the ventilation effect is poor, and accidents such as poisoning, suffocation and the like are easy to happen;
(4) When the stope pile is in suspension arch, the accidents of personnel and equipment being buried are easily caused.
Due to the above-mentioned disadvantages of the shallow hole shrinkage method, especially the labor intensity, the production efficiency and the safety are poor, it is increasingly difficult to find workers willing to do the work in the well. The search for new mining methods for such steeply dipping or dipping thin ore bodies is imperative. The test work similar to the segmented open-field stoping is carried out by individual mines such as the chapter source tungsten industry and the like in China, but the effect is very little.
In the mining industry of China in the past, because of the limitation of equipment, rock drilling equipment mainly adopts a shallow hole drilling machine as a main part, and a small part adopts a medium hole drilling machine, but the rock drilling depth is generally below 20 m. In the last two decades, with the advent of imported and domestic high-efficiency hydraulic drilling trolleys, the mining of medium-thickness ore bodies is mostly changed into hydraulic trolley rock drilling, and the hole depth of the hydraulic trolley rock drilling is from more than ten meters to nearly one hundred meters without technical difficulty. The advent of efficient rock drilling equipment provides advantageous equipment conditions for the implementation of the invention.
In order to solve the problems of low mining efficiency and poor safety condition of the existing inclined and steeply inclined thin ore body mining, a Chinese patent 202010271737.2 discloses a mining method of a steeply inclined thin ore vein, which comprises the following steps: 1) Preparing: the method comprises the following steps of (1) arranging a stope roadway on an ore body, wherein the stope roadway is arranged along the direction of the ore body and is provided with a stope roof; 2) Punching: forming a hole in a current stope roof, wherein the hole comprises a plurality of blast holes and a plurality of anchor rod holes, and the depth of each blast hole is greater than that of each anchor rod hole; 3) Supporting: mounting the anchor rod in the anchor rod hole; 4) Mining: after the supporting step is finished, carrying out ore recovery; 5) Embedding the medicine: filling explosives into all blast holes; 6) Blasting: after the mining step is completed, blasting operation is carried out so as to drop the roof of the current stope; 7) Danger elimination: and after the blasting step is completed, if the next stope roof is exposed, carrying out slag prying and danger elimination on the exposed next stope roof and surrounding rocks, and then returning to the punching step. The mining method can improve the mining efficiency and the mining safety. However, the method is not suitable for large-scale and mechanized application of inclined and steeply inclined thin ore bodies in general, and the production efficiency and the mechanization degree are still not high.
Disclosure of Invention
The invention aims to overcome the defects of low mechanization degree, high labor intensity, low efficiency, poor safety and reliability and the like of the existing inclined or steeply inclined thin ore body, and provides a bottom structure arrangement mode which is suitable for inclined or steeply inclined thin ore body mining and can greatly improve the safety condition during the stoping of the inclined or steeply inclined thin ore body, and is used for the mechanized mining of the inclined or steeply inclined thin ore body with the ore body thickness of 0.8-4.5 m.
In order to achieve the above purpose, the invention relates to a bottom structure arrangement mode suitable for inclined and steeply inclined thin ore body mining, which adopts a combined mining process of deep hole drilling equipment, medium-deep hole aperture and medium-shallow hole mesh parameters to replace a shallow hole shrinkage method, wherein studs are arranged at two sides of a room to be mined, an upper middle bottom stud is arranged at the upper part of the room to be mined, and a lower bottom stud is arranged at the lower part of the room to be mined, and the bottom structure arrangement mode is implemented by adopting the following technical scheme:
s1: firstly, tunneling a middle section vein outer gallery in parallel with an ore body within a distance range of 8-15 m from the upper middle section of the ore block to an ore body lower plate; then, an outer roadway of the middle section of the mine is vertical to the middle part of the stud, upper deep-hole rock drilling roadway connection roadways are tunneled at two ends of the ore block, the upper deep-hole rock drilling roadway is tunneled between the upper deep-hole rock drilling roadway connection roadways along the trend of the ore body, the upper deep-hole rock drilling roadway exceeds the boundary line of the ore body on the upper plate and the lower plate of the ore body by a certain distance, generally exceeds the boundary line of the ore body by more than 0.3m, and the range of 0.5 m-3.0 m is preferred; the thickness of the bottom column of the upper middle section at the upper part of the upper deep hole rock drilling gallery is required to be at least more than 3.1m, preferably in the range of 3.2-4.5 m;
s2: corresponding to the upper middle section, in the range of 7-12 m distance from the lower middle section of the ore block to the ore body lower plate, a lower ore loading access connection roadway is tunneled in parallel with the ore body, the lower ore loading access connection roadway is vertical to the ore loading access connection roadway, the ore loading access is tunneled every 5-7 m to reach the ore body, then the ore body sections between the ore loading accesses are communicated to form a lower middle-hole rock drilling gallery, the lower middle-hole rock drilling gallery exceeds the ore body boundary line of the upper and lower plates of the ore body by more than 0.3m, and the range of 0.5-3.0 m is preferred;
s3: after an upper deep hole drilling roadway and a lower middle hole drilling roadway are formed, tunneling and cutting raise shafts at the middle positions of ore blocks;
s4: after the above engineering is completed, mining begins, and a middle hole drill or a mining drill jumbo is adopted to drill an upward bottom-pulling middle hole in a lower portion Kong Zaoyan drift by taking a cutting raise as a center; taking a cutting raise as a free surface in the upper deep hole rock drilling gallery, and drilling a downward stoping deep hole by adopting a mining rock drilling jumbo; the hole depth of the upward bottom-pulling mesopore is within the range of 13-17 m, and the hole depth of the downward stoping deep hole is within the range of 36-44 m.
After the upward bottom-pulling middle hole drilling and the downward stoping deep hole drilling are finished, performing lateral ore caving blasting on blast holes in a graded, segmented and row-by-row mode by taking a cutting raise as a free surface; in the corresponding ore body, the upward bottom-drawing middle hole is firstly blasted at each time, then the downward back-mining deep hole is blasted, after each blasting, a part or all of the caving ore is shoveled and transported out of the stope by adopting shoveling and loading equipment in the ore loading access, the specific ore removal quantity is not fixed, but the minimum quantity of the caving ore which is shoveled, transported out of the stope must reach the compensation space of the next blasting after ore removal.
Preferably, a separation ore pillar with a diameter of more than 3m must be reserved at the top of the upper deep-hole rock drilling roadway, and the separation ore pillar can be a bottom pillar of an upper middle-section stope or a top pillar of the middle-section stope.
The bottom structure arrangement mode suitable for the mining of inclined and steeply inclined thin ore bodies has the following positive effects after the technical scheme is adopted:
(1) The method adopts the combined stoping process of 'deep hole rock drilling equipment, medium-deep hole aperture and medium-shallow hole mesh parameters' to replace a shallow hole shrinkage method, adopts the hole mesh parameters of deep hole or deep hole and medium-hole equipment rock drilling, medium-hole aperture, medium hole or shallow hole, and integrates the related processes of shallow hole, medium hole and deep hole mining methods, thereby greatly improving the mining efficiency of inclined and steeply inclined thin ore bodies.
(2) During stoping, rock drilling and charging are carried out in the upper and lower middle section in-seam drift, so that the safety condition during stoping by the existing shallow hole shrinkage method can be greatly improved.
(3) In the upper and lower middle section border lane, adopt mesopore rig or mining platform truck, upward drilling is upwards to the mesopore respectively and drilling is downwards to the deep hole down to cutting raise as the free surface, adopt the side to cave in and adopt the stope body, increased substantially the mechanized degree of the thin ore body stope of the steeply inclined, the field operation personnel's that has significantly reduced quantity, the deputy increase is showing.
Drawings
FIG. 1 is an elevation view of a substructure arrangement suitable for inclined, steeply inclined thin ore mining in accordance with the present invention;
FIG. 2 is a side view of a bottom structural arrangement of the present invention suitable for lean, steeply dipping thin ore mining;
FIG. 3 is a top horizontal view of the bedding and ore removal of a bottom structural arrangement of the present invention suitable for inclined, steeply inclined thin ore mining;
figure 4 is a horizontal top plan view of the mid-upper drilling of a bottom configuration arrangement of the present invention suitable for inclined, steeply inclined thin ore mining.
Labeled as: 1-middle section pulse outer gallery; 2-upper deep hole rock drilling gallery connection gallery; 3-upper deep hole rock drilling gallery; 4-lower ore loading access connection lane; 5-ore loading and route entry; 6-middle hole drilling gallery at the lower part; 7-cutting the raise; 8-upward pulling the bottom middle hole; 9-mining deep holes downwards; 10-ore caving; 11-stud; 12-upper middle bottom pillar; 12' -the bottom pillar of the middle section; 13-ore body boundary line; 14-room to be mined.
Detailed Description
To better describe the present invention, a bottom structure arrangement suitable for lean, steep thin ore mining according to the present invention will be described in further detail with reference to the accompanying drawings.
The bottom structure arrangement mode suitable for the mining of the inclined and steeply inclined thin ore body is used for the mechanized mining of the inclined and steeply inclined thin ore body with the ore body thickness of 0.8-4.5 m. As shown in fig. 1, a front view of a bottom structure layout suitable for inclined and steeply inclined thin ore body mining is combined with fig. 2, 3 and 4, studs 11 are arranged on two sides of a room 14 to be mined, an upper middle bottom stud 12 is arranged on the upper portion of the room 14 to be mined, and a middle bottom stud 12' is arranged on the lower portion of the room 14 to be mined, and the method is implemented by adopting the following steps:
s1: firstly, tunneling a middle-section vein outer gallery 1 in parallel with an ore body within a distance range of 8-15 m from the upper middle section of the ore block to an ore body lower plate; then, the middle section vein outer gallery 1 is vertical to the middle part of the pillar 11, an upper deep-hole rock drilling gallery connection gallery 2 is tunneled at two ends of an ore block, an upper deep-hole rock drilling gallery 3 is tunneled between the upper deep-hole rock drilling gallery connection galleries 2 along the trend of an ore body, the distance of the upper deep-hole rock drilling gallery 3 exceeding the boundary line 13 of the ore body of an upper plate and a lower plate of the ore body is 0.8m, and the thickness of an upper middle section bottom pillar 12 at the upper part of the upper deep-hole rock drilling gallery 3 is 3.5m;
s2: corresponding to the upper middle section, in the range of 7-12 m distance from the lower middle section of the ore block to the ore body lower plate, a lower ore loading access connection lane 4 is tunneled in parallel with the ore body, the lower ore loading access connection lane 4 is vertical to the ore loading access connection lane 4, ore loading accesses 5 are tunneled every 5-7 m to reach the ore body, then the ore body sections of the ore loading accesses 5 are communicated to form a lower middle-hole rock drilling drift 6, and the lower middle-hole rock drilling drift 6 exceeds the ore body boundary line 13 of the upper and lower plates of the ore body by 0.7m;
s3: after the upper deep hole drilling drift 3 and the lower middle hole drilling drift 6 are formed, a cutting raise 7 is tunneled at the middle position of the ore block;
s4: after the above engineering is completed, mining begins, and a middle hole 8 is drilled upwards and pulled to the bottom by adopting a middle hole drilling machine or a mining rock drilling trolley in a lower part Kong Zaoyan drift 6 by taking a cutting raise 7 as a center; in the upper deep hole rock drilling gallery 3, a cutting raise 7 is used as a free surface, and a mining rock drilling jumbo is used for drilling and drilling a downward stoping deep hole 9; the hole depth of the upward bottom-drawing middle hole 8 is in the range of 13-17 m, and the hole depth of the downward stoping deep hole 9 is in the range of 36-44 m. And a 3m isolating ore pillar must be reserved at the top of the upper deep-hole rock drilling roadway 3, and the isolating ore pillar can be a bottom pillar of an upper middle-section stope or a top pillar of the middle-section stope.
After the drilling of the upward bottom-pulling middle hole 8 and the downward mining deep hole 9 is finished, performing lateral ore caving blasting on blast holes in a graded, segmented and row-by-row mode by taking the cutting raise 7 as a free surface; in the corresponding ore body, the upward bottom-drawing middle hole 8 is firstly blasted at each time, then the downward mining deep hole 9 is blasted, after each blasting, a part or all of the caving ore 10 is shoveled and transported out of the stope by adopting shoveling and loading equipment in the ore loading access 5, the specific ore removal quantity is not fixed, but the minimum quantity of the caving ore 10 shoveled and transported out of the stope must reach the compensation space of the next blasting after ore removal. The mined ore is shoveled and loaded by shoveling and loading equipment, and can be directly poured into ore conveying equipment to be conveyed away, and can also be poured into a stope chute.
In the method, the lengths and angles of the upward bottom-drawing middle hole and the downward mining deep hole are not limited, the specific numerical value of the aperture is not limited, except for the necessary engineering of the upper deep hole drilling drift and the lower middle hole drilling drift, other mining preparation, cutting engineering and the lower bottom-drawing middle hole can be increased and decreased according to factors such as the condition of mining equipment, the occurrence condition of ore bodies, the existing engineering condition around a stope and the like, and the section sizes of all the engineering are not limited.
The bottom structure arrangement mode suitable for the mining of the inclined and steeply inclined thin ore bodies is successfully applied to engineering practice, and application results show that the bottom structure arrangement mode has the following outstanding advantages compared with the original shallow hole shrinkage method: firstly, the mechanization degree of the mining of the steeply inclined thin ore body can be greatly improved, the personnel reduction and the efficiency improvement are realized, and the number of field mining personnel is reduced by more than 50%; secondly, all procedures of the stoping operation are carried out in upper and lower middle section vein inner level roadways, so that the safety condition of the existing shallow hole shrinkage stoping method can be greatly improved; and thirdly, the mining efficiency of the ore body is greatly improved by more than 60%.
Claims (6)
1. A bottom structure arrangement mode suitable for the mining of inclined and steeply inclined thin ore bodies is used for the mechanized mining of the inclined and steeply inclined thin ore bodies with the ore body thickness of 0.8-4.5 m; be equipped with between post (11) in waiting to mine room (14) both sides, the upper portion of waiting to mine room (14) is upper middle section sill pillar (12), and the lower part of waiting to mine room (14) is this middle section sill pillar (12'), and its characterized in that adopts following technical scheme to implement:
s1: firstly, tunneling a middle section vein outer gallery (1) in parallel with an ore body within a distance range of 8-15 m from the upper middle section of the ore block to an ore body lower plate; then, an upper deep-hole rock drilling gallery connecting gallery (2) is tunneled at two ends of an ore block and is vertical to the middle part of the middle section vein outer gallery (1) and corresponds to the middle part of the stud (11), an upper deep-hole rock drilling gallery (3) is tunneled between the upper deep-hole rock drilling gallery connecting galleries (2) along the trend of an ore body, the upper deep-hole rock drilling gallery (3) exceeds the boundary line (13) of the ore body on the upper disc and the lower disc by more than 0.3m, and the thickness requirement of an upper middle section bottom pillar (12) at the upper part of the upper deep-hole rock drilling gallery (3) is at least more than 3.1m;
s2: corresponding to the upper middle section, in the range of 7-12 m distance from the lower middle section of the ore block to the ore body lower plate, a lower ore loading access connecting roadway (4) is tunneled in parallel with the ore body, the lower ore loading access connecting roadway (4) is vertical to the ore loading access connecting roadway, the ore loading accesses (5) are tunneled at intervals of 5-7 m and reach the ore body, then the ore body sections between the ore loading accesses (5) are communicated to form a lower middle-hole rock drilling drift (6), and the lower middle-hole rock drilling drift (6) exceeds the ore body boundary line (13) of the upper and lower plates of the ore body by more than 0.3 m;
s3: after an upper deep hole rock drilling drift (3) and a lower middle hole rock drilling drift (6) are formed, a cutting raise (7) is tunneled at the middle position of an ore block;
s4: after the above engineering is finished, the stoping is started, and an upward pull-bottom middle hole (8) is drilled by a middle hole drilling machine or a mining rock drilling trolley in a lower portion Kong Zaoyan drift (6) by taking a cutting raise (7) as a center; a cutting raise (7) is used as a free surface in the upper deep hole rock drilling gallery (3), and a mining rock drilling jumbo is adopted to drill a downward stoping deep hole (9); the hole depth of the upward bottom-drawing middle hole (8) is within the range of 13-17 m, and the hole depth of the downward stoping deep hole (9) is within the range of 36-44 m.
2. A substructure arrangement for inclined, steeply dipping thin ore mining according to claim 1, wherein: and an isolation ore pillar with the diameter of more than 3m must be reserved at the top of the upper deep hole rock drilling gallery (3), and the isolation ore pillar is a bottom pillar of an upper middle-section stope.
3. A substructure arrangement for inclined, steeply dipping thin ore body mining according to claim 1, wherein: and (2) reserving an isolation ore pillar with the length of more than 3m at the top of the upper deep hole rock drilling roadway (3), wherein the isolation ore pillar is a top pillar of the current middle section stope.
4. A substructure arrangement for inclined, steeply dipping thin ore mining according to claim 2 or 3, characterized in that: in the step S1, the distance between the upper deep hole drilling drift (3) and the boundary line (13) of the ore body of the upper and lower plates of the ore body ranges from 0.5m to 3.0 m.
5. A substructure arrangement for inclined, steeply dipping thin ore mining according to claim 2 or 3, characterized in that: in the step S2, the distance between the lower middle hole drilling drift (6) and the boundary line (13) of the ore body of the upper and lower plates of the ore body ranges from 0.5m to 3.0 m.
6. A substructure arrangement for inclined, steeply dipping thin ore mining according to claim 5, characterized in that: in the step S1, the thickness of an upper middle section bottom pillar (12) at the upper part of the upper deep hole drilling drift (3) is 3.2-4.5 m.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115680663A (en) * | 2023-01-03 | 2023-02-03 | 矿冶科技集团有限公司 | Mining method for steeply-inclined broken ore body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115680663A (en) * | 2023-01-03 | 2023-02-03 | 矿冶科技集团有限公司 | Mining method for steeply-inclined broken ore body |
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