CN-122014337-A - Ore-out subsequent filling mining method in upward continuous sectional rock drilling stage

Abstract

The invention discloses an upward continuous sectional rock drilling stage ore discharge subsequent filling mining method, which comprises the steps of 1) dividing ore bodies into a plurality of continuous ore rooms, namely a cemented filling ore room and a non-cemented filling ore room which are arranged at intervals, wherein the vertical direction of ore blocks is a stage height, the ore blocks are divided into a plurality of sections along the stage height, 2) firstly mining the cemented filling ore room from bottom to top in a sectional mode, then mining the non-cemented filling ore room, wherein the cemented filling ore room is mined in a sectional mode higher than the non-cemented filling ore room in the sectional height, 3) each section comprises a rock drilling tunnel and a bottom cutting tunnel, and a perforation area shared by the bottom cutting tunnel of the lower section and the rock drilling tunnel of the upper section forms a perforation unit. The method forms the top plate through the design of the sectional rock drilling blast holes, reduces local stress concentration, delays surrounding rock deformation, reduces disturbance influence, and improves extraction efficiency and overall stability.

Inventors

• RONG HUI
• YE HUISHI
• WANG LEI
• LIU YONGJIN
• TIAN YILIN
• SHEN HAOWEN
• Ben yong
• Ma Qiangying
• LU HONGJIAN
• CHEN YANTING
• LI ZHIPENG
• GAN DEQING
• PENG PENG
• LI HUA
• ZHAO KAI
• NING ZHENMING

Assignees

• 河北钢铁集团矿业有限公司
• 华北理工大学

Dates

Publication Date

20260512

Application Date

20260127

Claims (10)

1. 1. A method for ore discharge and subsequent filling mining in an upward continuous sectional rock drilling stage is characterized by comprising the following steps that 1) an ore body is divided into a plurality of continuous ore rooms, namely a cemented filling ore room and a non-cemented filling ore room which are arranged at intervals, wherein the vertical direction of ore blocks is a stage height, and the ore blocks are divided into a plurality of sections along the stage height; 2) Firstly, mining a cemented filling ore room in sections from bottom to top, then mining a non-cemented filling ore room, and mining the cemented filling ore room at a section height in preference to mining the non-cemented filling ore room at a section height; 3) Each section comprises a rock drilling tunnel (3) and a pull-down trench tunnel (1), and a perforation area shared by the pull-down trench tunnel (1) of the lower section and the rock drilling tunnel (3) of the upper section forms a perforation unit; 4) After the ore body of the cementing filling ore room or the non-cementing filling ore room is mined out, downwards drilling filling drill holes from a segmented filling inlet (6) on a drilling unit rock drilling roadway (3) to fill the empty areas; 5) Continuously mining and filling from bottom to top until the uppermost section, and forming an uppermost top plate by designing drilling blastholes; 6) An uppermost section filling route (6) is arranged at the uppermost section of the ore body, and an uppermost filling drill hole (9) and an uppermost filling exhaust drill hole (10) are constructed to the ore room through the uppermost section filling route (6).
2. 2. The method for subsequent ore discharge and filling mining in the upward continuous sectional rock drilling stage of claim 1, wherein in the step 3), the cemented filling ore room adopts indirect mining blasting, and the non-cemented filling ore room firstly mines one ore room of the cemented filling ore room and then mines the other ore room of the cemented filling ore room.
3. 3. The method of upward continuous sectional rock drilling stage ore discharge, subsequent to filling and mining according to claim 1, wherein in step 3), blasted ore is discharged from the ore discharge tunnel (2).
4. 4. The method for mining by filling and filling after ore discharge in the upward continuous sectional rock drilling stage according to claim 1, wherein the step 4) is characterized in that the hollow area is filled by performing high-strength cemented filling on the bottom and the top of the goaf of the ore room from bottom to top every other section, the rest is performed by performing cemented filling, the ore body filling process of the non-cemented filling ore room is the same as that of the cemented filling ore room, the bottom and the top of the goaf of the non-cemented filling ore room are performed by performing high-strength cemented filling on every other section from bottom to top, and the rest is performed by performing non-cemented filling.
5. 5. The method for ore discharge, subsequent filling and mining in an upward continuous sectional rock drilling stage, as claimed in claim 4, wherein the high-strength cemented filling is adopted at the bottom 5-10 m of the medium-thickness ore body, the high-strength cemented filling is adopted at the top 5-10 m of the medium-thickness ore body, the high-strength cemented filling is adopted at the bottom 10-15 m of the medium-thickness ore body, and the high-strength cemented filling is adopted at the top 5-10 m of the medium-thickness ore body.
6. 6. The method for ore removal and subsequent filling mining in the upward continuous sectional rock drilling stage according to claim 1, wherein in the step 5), the uppermost top plate is a special-shaped top plate (8), the special-shaped top plate (8) is in a step shape, one side boundary of the upper table top (81) is positioned below the position of a feed opening of the uppermost filling drill hole (9), and the lower table top (83) is inclined downwards towards the other side.
7. 7. The method for upward continuous vertical deep hole stage ore-cutting subsequent filling mining according to claim 6, wherein the position of the blanking opening of the uppermost filling drill hole (9) is located on the intersection line of the boundary of the upper table surface of the special-shaped top plate (8) and the boundary of the adjacent two-step mining body, wherein the boundary is 2-3 m upwards.
8. 8. The method for upward continuous vertical deep hole stage ore-cutting and subsequent filling mining according to claim 6, wherein the lower surface of the special-shaped top plate (10) has a gradient of 3-4 degrees.
9. 9. The method for upward continuous vertical deep hole stage mining subsequent filling as defined in claim 6, wherein the abnormal-shaped top plate (10) forms a step at a position 3-5 m on one side of the boundary of the two adjacent steps of mining bodies above the rock drilling chamber (4), and the step height is 1.5-2 m.
10. 10. The method for ore subsequent filling and mining in the upward continuous vertical deep hole stage according to any one of claims 1 to 9, wherein the uppermost filling drilling hole (9) and the uppermost filling exhaust drilling hole (10) are designed in a row along the direction of the ore room, the uppermost filling exhaust drilling hole is arranged between the uppermost filling drilling hole rows, the uppermost filling drilling hole (9) penetrates obliquely downwards to the boundary of the lower section ore room and the direction of the ore room before the lower section, the blanking hole is positioned at the boundary of the direction of the ore room before the lower section, the row distance of the uppermost filling drilling hole (9) of the medium-thickness ore body is half of the length of the ore room, and the row distance of the uppermost filling drilling hole (9) of the thick ore body is 20-25 m.

Description

Ore-out subsequent filling mining method in upward continuous sectional rock drilling stage Technical Field The invention relates to a mining method, in particular to an upward continuous sectional rock drilling stage ore removal subsequent filling mining method. Background The upward continuous sectional rock drilling stage ore-discharging subsequent filling mining method and the roof-connecting technology are modern mining methods combining deep hole blasting technology, sectional rock drilling, stage ore-discharging and filling technology, and the safe, efficient and low-cost green mining targets are gradually realized through structural parameter optimization, filling material grading application and blasting technology innovation. The upward continuous sectional rock drilling stage ore-cutting subsequent filling mining method improves rock drilling and ore-discharging efficiency, reduces disturbance to surrounding rock, reduces ground pressure risk, adapts to mineral body morphological change and reduces ore depletion through sectional rock drilling and stage ore-discharging. The cemented filling ore rooms and the non-cemented filling ore rooms are arranged at intervals, the cemented filling ore rooms are mined from bottom to top in sections, the non-cemented filling ore rooms are mined later, and the cemented filling ore rooms are mined at section heights in preference to the non-cemented filling ore rooms at section heights. The cementing material has certain compressive strength and bonding property, can provide medium-strength support for stopes or buildings, has relatively simple construction process and high construction speed of non-cementing materials, can shorten the construction period, improves the construction efficiency, can provide more stable support for stopes or buildings due to higher compressive strength and bonding property, effectively prevents accidents such as roof caving, slope collapse and the like, ensures the operation safety and reduces the production cost when the high-strength cementing filling, the cementing filling and the non-cementing filling are applied in different areas. The traditional filling roof-grafting method depends on material performance and process optimization, the roof-grafting rate depends on manual intervention, the phenomena of slurry sedimentation and segregation easily cause empty roof, the stability of a top plate is influenced, and complete roof-grafting is difficult to realize under complex geological conditions. In the traditional filling roof-connecting method, the self-flowing roof-connecting method utilizes the self-flowing characteristic of filling slurry to fill a goaf through natural flowing, but the empty roof phenomenon is easily caused by slurry sedimentation, the roof-connecting effect is unstable, and the pressurizing roof-connecting method pressurizes filling materials through pumping equipment to enable the materials to flow into a roof-connecting space along a pipeline, but the equipment is complex, the cost is higher, and the construction difficulty is higher. Disclosure of Invention The invention aims to solve the technical problem of providing a safe and reliable upward continuous sectional rock drilling stage ore discharging subsequent filling mining method with high resource utilization rate and strong adaptability. In order to solve the technical problems, the invention adopts the technical scheme that 1) an ore body is divided into a plurality of continuous ore rooms, namely a cemented filling ore room and a non-cemented filling ore room which are distributed at intervals, wherein the vertical direction of ore blocks is a stage height, and the ore blocks are divided into a plurality of sections along the stage height; 2) Firstly, mining a cemented filling ore room in sections from bottom to top, then mining a non-cemented filling ore room, and mining the cemented filling ore room at a section height in preference to mining the non-cemented filling ore room at a section height; 3) Each section comprises a rock drilling tunnel and a pull-down trench tunnel, and a perforation area shared by the pull-down trench tunnel of the lower section and the rock drilling tunnel of the upper section forms a perforation unit; 4) After the ore body of the cementing filling ore room or the non-cementing filling ore room is mined out, downwards drilling a filling drill hole from a segmented filling route on a drilling tunnel of a perforating unit to fill a dead zone; 5) Continuously mining and filling from bottom to top until the uppermost section, and forming an uppermost top plate by designing drilling blastholes; 6) And arranging an uppermost section filling inlet path at the uppermost section of the ore body, and constructing an uppermost filling drilling hole and an uppermost filling exhaust drilling hole to the ore room through the uppermost section filling inlet path. In step 3), the non-cemented filling chamber adopts indirect mining b