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CN-122014258-A - Mining method for metal mine skip mining filling roadway retaining

CN122014258ACN 122014258 ACN122014258 ACN 122014258ACN-122014258-A

Abstract

The invention provides a metal ore jump mining filling entry retaining mining method, which belongs to the technical field of metal ore mining and comprises the following steps of S1, dividing a metal ore section to be mined into a plurality of ore blocks according to specific conditions, sequentially marking the ore blocks, arranging ventilation and transportation tunnels in the ore sections, S2, mining a head mining room, namely determining the head mining room, installing a row of filling brackets on one side of the head mining room close to the ventilation and transportation tunnels for carrying out forward mining operation, S3, filling the head mining room, namely mining a design mining step distance in the head mining room, namely moving the filling brackets forward, immediately filling paste into a goaf behind the filling brackets to form a first filling body, completing a mining and filling cycle, reserving the tunnels on two sides of the filling body, and forming a system between the reserved tunnels and a stope in front of the frame. The invention can effectively control surrounding rock deformation, improve the safety and reliability of operation, improve the multiplexing rate of the roadway, reduce the tunneling engineering quantity and improve the resource recovery rate.

Inventors

  • ZHANG ZEWU
  • ZHANG BUQIN
  • ZHANG YISHU
  • ZHANG ZHUANG

Assignees

  • 飞翼股份有限公司

Dates

Publication Date
20260512
Application Date
20260316

Claims (10)

  1. 1. The mining method for the metal mine skip-mining filling roadway retention is characterized by comprising the following steps of: s1, dividing ore blocks, namely dividing a metal ore section to be mined into a plurality of ore blocks according to specific conditions, sequentially marking the plurality of ore blocks, and arranging ventilation and transportation roadways (3) in the ore sections; S2, the first mining room (5) is mined, namely the first mining room (5) is determined, and a row of filling supports (13) are arranged on one side of the first mining room (5) close to the ventilation and transportation roadway (3) to carry out advancing mining operation (10); S3, filling the first mining room (5), namely mining a designed mining step distance in the first mining room (5), namely moving a filling support (13) forwards, immediately filling paste into a goaf behind the filling support (13) to form a first filling body (7), completing a mining and filling cycle, reserving roadways (4) on two sides of the filling body, and forming a system by the reserved roadways (4) and a stope in front of a frame; S4, mining the secondary mining room (6), namely spacing one non-mining room (1), selecting the next non-mining room (1) as the secondary mining room (6) to carry out forward mining operation (10), and reserving tunnel openings of tunnels (4) at two sides of the primary mining room (5) to arrange temporary retaining walls (8) before mining the secondary mining room (6); S5, filling a secondary mining room (6), namely, in the process of mining the secondary mining room (6), mining a design step distance, namely, moving a filling support (13) forwards in the secondary mining room (6), immediately filling paste in a goaf behind the filling support (13) to form a second filling body (9), completing a mining and filling cycle, and reserving roadways (4) on two sides of the filling body, and forming a system by the roadway and a stope in front of a frame; S6, roadway reservation, namely after filling of the first mining room (5) and the second mining room (6) is completed, the first filling body (7), the second filling body (9) and the original reserved roadway (4) between the mining rooms (1) between the first filling body (7) and the second filling body (9) are clamped, and the reserved roadway (4) is stably reserved under the supporting action of the first filling body (7) and the second filling body (9); S7, stoping the middle stoping room (12), wherein the reserved roadway (4) reserved in the step S6 is used as a channel for subsequent stoping operation, stoping is carried out on the stoping room (1) between the first stoping room (5) and the second stoping room (6), and at the moment, the reserved roadway (4) is a ore drawing, ventilation and pedestrian channel; And S8, repeating the steps S2 to S7, namely continuously skipping and picking a next group of ore rooms (1) at intervals, filling goafs, reserving an intermediate roadway as a reserved roadway (4), and stoping an intermediate non-mined room (12) until the mining of the whole ore section is completed.
  2. 2. The method for mining the metal ore by skip-mining filling roadway retention according to claim 1, wherein in the step S1, the metal ore is gold ore, copper ore, iron ore or lead zinc ore, the occurrence condition of ore bodies is gentle to steep, and the thickness of the ore bodies is medium to large; When the ore blocks, the ore rooms (1) and the ore pillars (2) are divided, ore body occurrence conditions, mining technical conditions and economic factors are comprehensively considered, and the size of the ore blocks, the parameters of the ore rooms (1) and the parameters of the ore pillars (2) are determined.
  3. 3. The metal mining jump mining filling entry retaining mining method according to claim 2, wherein in the step S1, ore blocks are divided into ore blocks with the length of 50-150 m along the trend of ore bodies, each ore block is divided into an ore room (1) and an ore pillar (2) along the trend, the ore room (1) is designed to be a first mining room (5) and a second mining room (6), the ore pillar (2) is designed to be a middle non-mining room (12), the width of the ore room (1) is 8-30 m, and the width of the ore pillar (2) is 5-25 m.
  4. 4. The metal ore jump mining filling entry retaining mining method according to claim 1, wherein the first mining room (5) in the step S2 is a room (1) with relatively simple geological conditions and convenient construction, the mining process adopts medium-deep hole blasting ore dropping, and blasting parameters are determined according to comprehensive ore properties and the size of the room (1).
  5. 5. The method according to claim 1, wherein in the step S3, before the first mining room (5) is filled, the goaf is thoroughly pumice treated and washed, loose rock blocks and sundries on the roof and the two sides are removed, and the filling body is ensured to be in close contact with surrounding rock; The filling material is cementing filling or high water consolidation tailing filling, and the uniaxial compressive strength of the filling body is more than or equal to 3MPa.
  6. 6. The metal mine skip-mining filling roadway-retaining mining method according to claim 1, wherein in the step S4, the secondary mining room (6) is subjected to a stoping operation by adopting a stoping process which is the same as or similar to that of the primary mining room (5); the filling process and the filling requirement of the secondary mining room (6) in the step S5 are the same as those of the primary mining room (5), so that the quality of the first filling body (7) and the quality of the second filling body (9) are ensured.
  7. 7. The metal mine skip-mining filling roadway-retaining mining method according to claim 1, wherein the middle non-mining room (12) adopts a back-down caving method (11) for stoping.
  8. 8. The method according to claim 1, wherein in the step S7, temporary retaining walls (8) are arranged at the openings of the reserved roadway (4) on the side of the secondary mining room (6) away from the middle non-mining room (12) before the middle non-mining room (12) is mined.
  9. 9. The method according to claim 1, wherein in step S6, the reserved roadway (4) needs to be repaired and reinforced as necessary before being used as a subsequent stoping channel, including guniting, bolting or anchor cable supporting.
  10. 10. The mining method of metal mine skip-mining filling roadway retention according to claim 1, wherein deformation of surrounding rocks and filling bodies of a stope is monitored in real time in the whole mining process, and stope parameters and filling processes are adjusted according to the monitored data.

Description

Mining method for metal mine skip mining filling roadway retaining Technical Field The invention belongs to the technical field of metal ore mining, relates to a metal ore mining method, and particularly relates to a metal ore skip mining filling roadway-retaining mining method. Background In the process of developing mining operations for deposits of metal ores, a conventional mining mode mostly adopts a blank field method to perform mining operations of the metal ores. When this mining approach is employed, a number of problems are encountered. One of the significant problems is that the recovery of the ore pillar from room to room is difficult, which makes the recovery of the ore body inadequate. Because ore pillars are not recovered smoothly, many ores which can be mined originally cannot be utilized effectively, and the recovery rate of resources is low. Besides, the goaf formed by mining by adopting the empty field method has the characteristics of large exposure area and long exposure time. The goaf is exposed to the outside for a long time in a large area, and serious deformation of surrounding rock is easy to occur. Once the surrounding rock is severely deformed, the stability of the stope is greatly affected, so that the stability of the stope is poor. Under such an unstable stope environment, safety accidents such as roof fall, lasting and the like frequently occur. These accidents not only constitute a serious threat to the life safety of the mining personnel, but also can hinder the normal progress of the mining work. Meanwhile, the traditional open stope mining also needs to continuously tunnel a large amount of new roadways along with the mining process. Tunneling new roadways is a complex and time-consuming process that requires a significant amount of time and effort. Moreover, the new roadway is driven by a great deal of manpower, material resources and financial resources, which results in very high exploitation cost. From the whole point of view, the exploitation mode with high cost and low recovery rate greatly reduces the economic benefit of the mine and is unfavorable for the sustainable development of the mine. Based on the above situation, it is necessary to provide a metal ore mining method capable of effectively controlling deformation of surrounding rock, improving safety and reliability of operation, improving multiplexing rate of a roadway, reducing tunneling engineering amount and improving resource recovery rate. Disclosure of Invention The invention aims to provide a metal mine skip-mining filling entry retaining mining method, which aims to solve the technical problems of serious surrounding rock deformation, poor stope stability, insufficient ore body stoping and large tunnel tunneling engineering quantity in the prior art. In order to achieve the above purpose, the specific technical scheme of the invention is as follows: a mining method of a metal mine skip-mining filling roadway-retaining comprises the following steps: s1, dividing ore blocks, namely dividing a metal ore section to be mined into a plurality of ore blocks according to specific conditions, sequentially marking the plurality of ore blocks, and arranging ventilation and transportation roadways in the ore sections; s2, the first mining room is mined, namely the first mining room is determined, and a row of filling supports are arranged on one side of the first mining room, which is close to a ventilation and transportation roadway, to carry out forward mining operation; S3, filling a first mining room, namely mining a designed mining step distance in the first mining room, namely moving a filling support forwards, immediately filling paste into a goaf behind the filling support to form a first filling body, completing a mining and filling cycle, reserving roadways on two sides of the filling body, and forming a system by the reserved roadways and a stope in front of the support; S4, mining the secondary mining room, namely separating one non-mining room, selecting the next non-mining room as the secondary mining room to carry out forward mining operation, and reserving roadway openings of the roadway at two sides of the primary mining room to arrange temporary retaining walls before mining the secondary mining room; S5, filling a secondary mining room, namely, in the process of mining the secondary mining room, moving a filling support forwards at a designed step distance, immediately filling paste into a goaf behind the filling support to form a second filling body, completing a mining and filling cycle, reserving roadways on two sides of the filling body, and forming a system by a roadway and a stope before a frame; S6, roadway reservation, namely after filling of the first mining room and the second mining room is completed, clamping an original reserved roadway between the first filling body, the second filling body and an unwilling room between the first filling body and the second filling body by the f