CN110029998B - Sublevel rock drilling stage ore removal subsequent filling method suitable for steeply inclined thin and medium thick ore body - Google Patents
Sublevel rock drilling stage ore removal subsequent filling method suitable for steeply inclined thin and medium thick ore body Download PDFInfo
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- CN110029998B CN110029998B CN201910226526.4A CN201910226526A CN110029998B CN 110029998 B CN110029998 B CN 110029998B CN 201910226526 A CN201910226526 A CN 201910226526A CN 110029998 B CN110029998 B CN 110029998B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
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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
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
- E21D19/02—Provisional protective covers for working space for use in longwall working
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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Abstract
The invention discloses a sublevel rock drilling stage ore removal subsequent filling method suitable for steeply inclined thin and medium thick ore bodies, which is characterized in that a stope is arranged along the trend of the ore bodies, ore rooms and ore pillars in the stope are arranged at intervals, ore blocks share an ore pass shaft and a ventilation raise shaft, the ore pass shaft and the ventilation raise shaft are respectively communicated with an ore removal connected roadway and a bottom drawing roadway through an ore removal threading and a rock drilling threading, and the ore removal connected roadway is positioned on a lower tray of the ore bodies; drilling upward sector medium-length holes by adopting a hydraulic drill jumbo, wherein blast holes in rows are staggered, and blasting 1-2 rows of blast holes each time; the invention has the advantages of higher operation safety, simple arrangement mode of stope blocks, long service life of a single stope, small mining-cutting ratio, low dilution rate, high recovery rate and lower production cost of ton ore.
Description
Technical Field
The invention relates to the field of an underground operation method, in particular to a sublevel rock drilling stage ore removal subsequent filling method suitable for a steeply inclined thin and medium thick ore body.
Background
At present, a shallow hole shrinkage-ore subsequent filling method is adopted for steeply inclined thin-medium thick ore bodies (the thickness of the ore bodies is 8-30 m) of mines in China, the stage height is 40-50 m, the subsection height is 10-14 m, ore pillars of a room are arranged at intervals, after the room is filled, the ore pillars are stoped, the stope width is 16m, the width of the room in one step is 8m, and the width of the pillar in the second step is 8 m. For an extra-large underground mine, in order to meet the production capacity of the mine, a plurality of ore blocks are often required to be organized for simultaneous production, personnel operate in a stope with exposed roofs and two sides of the stope with filling bodies, risks of roof falling and filling body collapse are faced at any time, the operation safety is poor, each stratified mining must be carried out on the working procedures of rock loosening, roof prying, supporting and the like, the roof management labor intensity is high, a man-way ventilation shaft and a stope connection roadway need to be newly added, and the mining and cutting engineering quantity is large.
The invention aims to provide a method for ore removal subsequent filling in a subsection rock drilling stage suitable for a steeply inclined thin and medium thick ore body, and the method is used for solving the problems in the prior art that a shallow hole shrinkage subsequent filling method is adopted for operation.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a sublevel rock drilling stage ore removal subsequent filling method applicable to steeply inclined thin and medium thick ore bodies is characterized in that: the method comprises the following steps:
(1) arranging a stope: arranging stopes along the trend of the ore body, wherein ore rooms and ore pillars in the stopes are arranged at intervals, the length of each stope is 40-50 m, the width of each stope is the horizontal thickness of the ore body, the sectional height is 25-28 m, and the stage height is 100-120 m;
(2) and mining and cutting: ore blocks share an ore pass and a ventilation raise, the ore pass and the ventilation raise are respectively communicated with an ore removal connection roadway and a bottom pulling roadway through an ore removal threading and a rock drilling threading, the ore removal connection roadway and the bottom pulling roadway are arranged in a vein, a bottom trench bottom structure is adopted, the ore removal connection roadway is positioned on a lower plate of an ore body, an included angle between an ore removal approach and the ore removal connection roadway is 55 degrees, the interval between the ore removal approach is 16m, and the rock drilling subsection vein-following roadway is arranged at a position of 5-15 m of the lower plate of the ore body;
(3) and stoping: drilling upward sector-shaped medium-length holes by using a hydraulic drill jumbo for rock drilling, wherein the diameter of blast holes is 80mm, the row spacing of the blast holes is 1.8 m or 2m, the blast holes between rows are arranged in a staggered manner, and 1-2 rows of blast holes are blasted each time;
the sublevel rock drilling stage ore removal subsequent filling method suitable for the steeply inclined thin and medium thick ore body is characterized in that: in the step (2), the cutting raise and the cutting cross drift are arranged at the end part of the ore block; when the pillars are stoped, two ends of the stope are filling bodies, and a cutting raise and a cutting cross drift are arranged at a position 1m close to the end part.
The sublevel rock drilling stage ore removal subsequent filling method suitable for the steeply inclined thin and medium thick ore body is characterized in that: and arranging upward parallel medium-length holes row by row in the cutting lane, and blasting the cutting rows by taking the cutting wells as free surfaces to form cutting grooves.
The sublevel rock drilling stage ore removal subsequent filling method suitable for the steeply inclined thin and medium thick ore body is characterized in that: in the step (3), the cutting and rock drilling roadway mesopores are all arranged in the ore body, a protective wall of 0.5-1 m is reserved, damage and damage of blasting to supporting surrounding rocks are reduced, and rock rib mixing is reduced.
The sublevel rock drilling stage ore removal subsequent filling method suitable for the steeply inclined thin and medium thick ore body is characterized in that: in the step (3), the blast holes are charged by an explosive charging trolley, the explosives are ammonia oil particle explosives, millisecond differential blasting is carried out, the central blast hole is blasted firstly, and then the corner blast holes are blasted; and each section is subjected to stepped blasting ore falling from top to bottom in different times, a diesel carry scraper is adopted for loosening ore removal in each rock drilling level, and an electric carry scraper is adopted for centralized ore removal in the ore removal level.
Compared with the traditional mining method and mining technology for mining the steeply inclined thin-medium thick ore body, the method has the following obvious advantages:
1. the operations of rock drilling, roof prying, supporting and the like in the stope with the exposed top plate and the two sides both being filling bodies are avoided, and the operation safety is high.
2. The arrangement mode of the stope blocks is simple, the ore output amount of a single stope is large, and the novel requirements of large-scale mining of super-huge mines are met.
3. The single stope has long service life, balanced production, easy organization and high mechanization degree.
4. The mining-cutting ratio is small, the dilution rate is low, the recovery rate is high, and the production cost of ton ore is low.
Detailed Description
The sublevel rock drilling stage ore removal subsequent filling method suitable for the steeply inclined thin and medium thick ore body comprises the following steps:
(1) arranging a stope: arranging stopes along the trend of the ore body, wherein ore rooms and ore pillars in the stopes are arranged at intervals, the length of each stope is 40-50 m, the width of each stope is the horizontal thickness of the ore body, the sectional height is 25-28 m, and the stage height is 100-120 m;
(2) and mining and cutting: ore blocks share an ore pass and a ventilation raise, the ore pass and the ventilation raise are respectively communicated with an ore removal connection roadway and a bottom pulling roadway through an ore removal threading and a rock drilling threading, the ore removal connection roadway and the bottom pulling roadway are arranged in a vein, a bottom trench bottom structure is adopted, the ore removal connection roadway is positioned on a lower plate of an ore body, an included angle between an ore removal approach and the ore removal connection roadway is 55 degrees, the interval between the ore removal approach is 16m, and the rock drilling subsection vein-following roadway is arranged at a position of 5-15 m of the lower plate of the ore body;
(3) and stoping: drilling upward sector-shaped medium-length holes by using a hydraulic drill jumbo for rock drilling, wherein the diameter of blast holes is 80mm, the row spacing of the blast holes is 1.8 m or 2m, the blast holes between rows are arranged in a staggered manner, and 1-2 rows of blast holes are blasted each time;
in the step (2), the cutting raise and the cutting cross drift are arranged at the end part of the ore block; when the pillars are stoped, two ends of the stope are filling bodies, and a cutting raise and a cutting cross drift are arranged at a position 1m close to the end part.
And arranging upward parallel medium-length holes row by row in the cutting lane, and blasting the cutting rows by taking the cutting wells as free surfaces to form cutting grooves.
In the step (3), the cutting and rock drilling roadway mesopores are all arranged in the ore body, a protective wall of 0.5-1 m is reserved, damage and damage of blasting to supporting surrounding rocks are reduced, and rock rib mixing is reduced.
In the step (3), the blast holes are charged by an explosive charging trolley, the explosives are ammonia oil particle explosives, millisecond differential blasting is carried out, the central blast hole is blasted firstly, and then the corner blast holes are blasted; and each section is subjected to stepped blasting ore falling from top to bottom in different times, a diesel carry scraper is adopted for loosening ore removal in each rock drilling level, and an electric carry scraper is adopted for centralized ore removal in the ore removal level.
Claims (5)
1. A sublevel rock drilling stage ore removal subsequent filling method applicable to steeply inclined thin and medium thick ore bodies is characterized in that: the method comprises the following steps: (1) arranging a stope: arranging stopes along the trend of the ore body, wherein ore rooms and ore pillars in the stopes are arranged at intervals, the length of each stope is 40-50 m, the width of each stope is the horizontal thickness of the ore body, the sectional height is 25-28 m, and the stage height is 100-120 m; (2) and mining and cutting: ore blocks share an ore pass and a ventilation raise, the ore pass is communicated with an ore removal heading and a bottom pulling roadway through an ore removal drift, the ventilation raise is communicated with the ore removal heading and the bottom pulling roadway through a rock drilling drift, the ore removal heading and the bottom pulling roadway are arranged in a drift, the bottom structure of the ore blocks adopts a flat-bottomed trench, the ore removal heading is located on the ore body footwall, an included angle between an ore removal route and the ore removal heading is 55 degrees, the ore removal route interval is 16m, and a rock drilling subsection drift is arranged at the position of 5-15 m of the ore body footwall; (3) and stoping: the method is characterized in that the rock drilling adopts a hydraulic rock drilling trolley to drill upward sector-shaped medium-length holes, the diameter of blast holes is phi 80mm, the row spacing of the blast holes is 1.8 m or 2m, the blast holes between rows are arranged in a staggered mode, and 1-2 rows of the blast holes are blasted each time.
2. The staged rock drilling stage ore removal subsequent filling method for steeply dipping thin and medium thick ore bodies according to claim 1, characterized in that: in the step (2), the cutting raise and the cutting cross drift are arranged at the end part of the ore block; when the pillars are stoped, two ends of the stope are filling bodies, and a cutting raise and a cutting cross drift are arranged at a position 1m close to the end part.
3. The staged rock drilling stage ore removal subsequent filling method for steeply dipping thin and medium thick ore bodies according to claim 2, characterized in that: and arranging upward parallel medium-length holes row by row in the cutting lane, and blasting the cutting rows by taking the cutting wells as free surfaces to form cutting grooves.
4. The staged rock drilling stage ore removal subsequent filling method for steeply dipping thin and medium thick ore bodies according to claim 1, characterized in that: in the step (3), the cutting and rock drilling roadway mesopores are all arranged in the ore body, a protective wall of 0.5-1 m is reserved, damage and damage of blasting to supporting surrounding rocks are reduced, and rock rib mixing is reduced.
5. The staged rock drilling stage ore removal subsequent filling method for steeply dipping thin and medium thick ore bodies according to claim 1, characterized in that: in the step (3), the blast holes are charged by an explosive charging trolley, the explosives are ammonia oil particle explosives, millisecond differential blasting is carried out, the central blast hole is blasted firstly, and then the corner blast holes are blasted; and each section is subjected to stepped blasting ore falling from top to bottom, a diesel carry scraper is adopted to loosen and remove ore in each drilling level, and an electric carry scraper is adopted to concentrate and remove ore in each ore removing level.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110656939B (en) * | 2019-09-12 | 2020-10-20 | 北京科技大学 | Large-stage efficient mining method for steeply inclined medium-thickness ore body meeting water argillization surrounding rock |
| CN112963147B (en) * | 2021-03-17 | 2022-01-11 | 内蒙古包头鑫达黄金矿业有限责任公司 | Medium-length hole blasting mining process for steeply inclined thin ore body |
| CN114215519B (en) * | 2021-11-30 | 2023-11-07 | 西北矿冶研究院 | Multi-scheme combined mining method for thick ore body with steep inclination of thickness change |
| CN114856563B (en) * | 2022-06-02 | 2023-04-07 | 紫金矿业集团股份有限公司 | Dead-weight ore-falling mining method for deep-hole pre-cracked ore in downward stage of broken ore rock |
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