CN-122014260-A - High-access step type continuous stoping subsequent filling mining method

CN122014260ACN 122014260 ACN122014260 ACN 122014260ACN-122014260-A

Abstract

The application provides a high-way step-type continuous stoping subsequent filling mining method, which belongs to the technical field of metal ore mining and comprises the steps of tunneling a lower layering operation space of an initial stoping unit, picking a roof to construct an upper layering operation space, stacking a ramp, stoping the upper layering first, then layering the lower layering to finish, stoping to form a goaf, filling and reserving a circulating operation space without roof connection for the first time, tunneling a first shelter chamber in the circulating operation space, picking the roof to construct a lower layering operation space of the next stoping unit, filling the circulating operation space, tunneling a second shelter chamber, picking the roof to construct the upper layering operation space of the next stoping unit, stacking the ramp, stoping the lower layering first, stoping the upper layering until the upper layering is communicated with a slide shaft, tunneling the third shelter chamber, and finishing stoping of the upper layering rest. And (3) filling without roof connection and reserving a circulating operation space after stoping, and repeating the procedures until stoping is finished, and fully filling the last goaf. And high-efficiency exploitation is realized by optimizing the stoping and filling processes.

Inventors

ZHAO XINGDONG
LIU SHAOKANG
SONG JINGYI
SUN ZHIWEI
LAI HEYUN
QIN SHAOLONG
MA SHUZHAO

Assignees

东北大学

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. The high-access step type continuous stoping subsequent filling mining method is characterized by comprising the following steps of: tunneling a layered operation space below an initial stoping unit at two ends of a stope to the center of a stope, picking a layered operation space above the initial stoping unit for roof construction, and piling up a slope of the initial stoping unit; Adopting a common approach method to stope the upper strata of the initial stoping unit to finish, adopting a method of constructing downward blast holes and laterally breaking ores to stope the lower strata of the initial stoping unit to finish; forming an initial stoping unit goaf after stoping, filling and reserving a circulating operation space by adopting a filling method of filling for the first time without roof connection; Tunneling a first shelter chamber at a first side of the circulating operation space, and lifting a roof from a second side to construct a lower layered operation space of a next extraction unit, so as to fill the circulating operation space; Tunneling a second shelter chamber at the second side of the lower layered operation space of the next extraction unit, and picking the top at the first side to construct the upper layered operation space of the next extraction unit and synchronously piling up the ramp of the next extraction unit; Adopting a common approach method to stope the upper layering of a next stoping unit until the next stoping unit is communicated with a first side drop shaft, adopting a method of constructing a downward blast hole and laterally caving ore to stope the lower layering of the next stoping unit until the next stoping unit is communicated with the first side drop shaft, tunneling a third shelter chamber, and returning to a second side to finish stoping operation of the layering rest part of the next stoping unit; forming a goaf of a next stoping unit after stoping, filling and reserving the circulating operation space by adopting a filling method of filling for the first time without roof connection; returning to the step of tunneling the first shelter chamber at the first side of the circulating operation space, picking the top from the second side to construct the lower layered operation space of the next stoping unit, filling the circulating operation space until the ore body completely completes stoping operation, and fully filling the goaf of the last next stoping unit.
2. The high-access stepped continuous back-fill mining method of claim 1, wherein the height of the circulating working space is 1.8 m-2.5 m.
3. The high-access stepped continuous stoping subsequent filling mining method according to claim 1, further comprising, prior to said step of tunneling the initial stoping element lower layered operating space toward the stope center at both ends of the stope: arranging ore blocks along the trend of an ore body; Constructing an upper stope connecting roadway and a lower stope connecting roadway, and connecting the lower stope connecting roadway with the upper stope connecting roadway by constructing a forward courtyard from the lower stope connecting roadway to the upper stope connecting roadway so as to form a closed channel for ventilation transportation; and supporting the upper stope connecting roadway, the lower stope connecting roadway and the along-road courtyard.
4. The continuous stoping subsequent filling mining method of high road step type according to claim 3, wherein the height of the ore block is 40 m-60 m, the length is 50 m-100 m, the width of the ore block is the thickness of the ore body, and the layering height is 3 m-4.5 m.
5. A high-access stepped continuous stoping subsequent filling mining method according to claim 3, wherein said step of constructing an upper stope connection and a lower stope connection comprises: and constructing from the upper stage roadway to the stope at the lower part of the stope to form a lower stope connecting roadway.
6. The high-entry stepped continuous back-fill mining method of claim 4, wherein the length of the sub-initial extraction unit sub-stratified operating space is determined based on said stratified height and a maximum equipment climbing angle.
7. The high-access stepped continuous back-fill mining method of claim 4, wherein a length of a sub-unit sub-floor operational space is determined based on said floor height, a maximum equipment ramp angle, and a blast vibration safety distance.
8. A high-access stepped continuous stoping subsequent filling mining method according to claim 3, wherein the steps of supporting said upper stope connection roadway, said lower stope connection roadway and said forward-looking patio are: And the upper stope connecting roadway, the lower stope connecting roadway and the along-road courtyard are jointly supported by adopting anchor cables, anchor rods, metal nets and sprayed concrete.
9. A high-access stepped continuous stoping subsequent filling mining method according to claim 3, wherein said steps of selecting a layered operating space on an initial stoping unit for construction and stacking an initial stoping unit ramp are as follows: Supporting a top plate of the layered operation space under the initial recovery unit by adopting an anchor cable, and performing overhead blasting construction to form a layered operation space on the initial recovery unit, wherein anchor cable holes and blastholes are staggered; after roof collapse, ore is removed and is temporarily used for an initial stoping unit ramp of the mining equipment.
10. The high-entry stepped continuous stoping subsequent filling mining method according to claim 1, wherein the slope of the initial stoping unit ramp and the next stoping unit ramp are both adapted to the maximum climbing angle of the mining apparatus.

Description

High-access step type continuous stoping subsequent filling mining method Technical Field The application belongs to the technical field of metal ore mining, and particularly relates to a high-access step type continuous stoping subsequent filling mining method. Background The steep narrow and thin ore vein is a typical complex ore body in metal ore exploitation, the ore body is irregular in shape and obvious in occurrence change, the trend and occurrence state of the ore vein are unstable, the phenomena of branching, compounding and pinch-out reproduction are frequent, the thickness of the ore body is more than 0.2-4.0 m, and the thickness fluctuation range is large. The existing industry mostly adopts traditional mining methods taking shallow hole ore dropping as a core, such as shallow hole ore reserving method, wall cutting filling method, layering filling method and the like, to stope under the restriction of occurrence conditions of thin thickness and severe variation of ore bodies, and the traditional mining methods usually adopt hand holding drilling rock construction, and have the problems of poor operation safety, high production cost, high labor intensity, low mechanization level, small production capacity and the like, and the mining efficiency is low for a long time. In order to solve the problems, attempts are made in the industry to adopt medium-length hole ore dropping and large-structure parameter mining schemes, and the mining efficiency and the mechanical degree can be improved to a certain extent, but the method still has the defects of large ore loss and dilution, difficult control of the mining amplitude and the like, and particularly, under the condition of severe change of the ore body production, serious loss and dilution are easy to cause. In summary, deep metal ore steeply inclined narrow and thin vein mining still faces a prominent technical bottleneck, and in order to realize safe, efficient and economic mining of the ore body, development of a novel mining method is urgently needed. Disclosure of Invention It is therefore an object of the present application to provide a high-access stepped continuous stoping and backfilling mining method that solves at least one technical problem of the background art. In order to solve the above problems, the present application provides a high-way step-type continuous stoping and filling mining method comprising: tunneling a layered operation space below an initial stoping unit at two ends of a stope to the center of a stope, picking a layered operation space above the initial stoping unit for roof construction, and piling up a slope of the initial stoping unit; Adopting a common approach method to stope the upper strata of the initial stoping unit to finish, adopting a method of constructing downward blast holes and laterally breaking ores to stope the lower strata of the initial stoping unit to finish; forming an initial stoping unit goaf after stoping, filling and reserving a circulating operation space by adopting a filling method of filling for the first time without roof connection; Tunneling a first shelter chamber at a first side of the circulating operation space, and lifting a roof from a second side to construct a lower layered operation space of a next extraction unit, so as to fill the circulating operation space; Tunneling a second shelter chamber at the second side of the lower layered operation space of the next extraction unit, and picking the top at the first side to construct the upper layered operation space of the next extraction unit and synchronously piling up the ramp of the next extraction unit; Adopting a common approach method to stope the upper layering of a next stoping unit until the next stoping unit is communicated with a first side drop shaft, adopting a method of constructing a downward blast hole and laterally caving ore to stope the lower layering of the next stoping unit until the next stoping unit is communicated with the first side drop shaft, tunneling a third shelter chamber, and returning to a second side to finish stoping operation of the layering rest part of the next stoping unit; forming a goaf of a next stoping unit after stoping, filling and reserving the circulating operation space by adopting a filling method of filling for the first time without roof connection; returning to the step of tunneling the first shelter chamber at the first side of the circulating operation space, picking the top from the second side to construct the lower layered operation space of the next stoping unit, filling the circulating operation space until the ore body completely completes stoping operation, and fully filling the goaf of the last next stoping unit. Optionally, the height of the circulating operation space is 1.8 m-2.5 m. Optionally, before the step of tunneling the layered operation space under the initial stoping unit toward the stope center at both ends of the stope, the method further comprises: arra