CN-121976803-A - Efficient rotary section downward large-diameter deep hole ore room mining method

CN121976803ACN 121976803 ACN121976803 ACN 121976803ACN-121976803-A

Abstract

The invention discloses a downward large-diameter deep hole mining method of a high-efficiency rotary section, which comprises the following steps of 1) dividing a mining room in the same mining stage into a plurality of one-step mining rooms and two-step mining rooms in a disc area, 2) horizontally constructing a rock drilling chamber at the upper part of the mining room, wherein the rock drilling chamber comprises a long rock drilling chamber and a short rock drilling chamber, the chisel jumper rock drilling chamber is arranged at one boundary of the mining room along the length direction of the mining room, the short rock drilling chamber extends from the chisel jumper rock chamber to the other boundary of the mining room and is provided with a plurality of rock drilling chambers, and a horizontal construction tunnel and an access way at the lower part of the mining room comprise a trench draw-bottom tunnel and an access way, the trench draw-bottom tunnel extends from the trench draw-bottom tunnel to the other boundary of the mining room and is provided with a plurality of rock drilling chambers, and 3) vertically constructing a cutting gutter at the end of the trench draw-bottom tunnel towards the rock drilling chamber. The method can realize safe, efficient and low-cost connection, and improves the recovery rate and benefit of mine resources.

Inventors

MA YOULI
LI JIAN
LIU HUI
DENG XI
LU HONGJUN
LI LIN
QIN LIJIE
GUO ZILIN
LU YANZE
ZHAO DI
REN QINGWEI
LIU HAISHAN
YANG CHUANG
DU YINGNAN
GUAN JIAN

Assignees

河北钢铁集团矿业有限公司
河钢股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260204

Claims (7)

1. A mining method of a downward large-diameter deep hole ore room with a high-efficiency rotating section is characterized by comprising the following steps of 1) dividing ore blocks into a plurality of one-step mining rooms and two-step mining rooms in a disc area; 2) The ore block accurate construction comprises a rock drilling chamber which is horizontally constructed in the rock drilling at the upper part of an ore room and comprises a long rock drilling chamber and a short rock drilling chamber, wherein the chisel jumper rock drilling chamber is arranged at one boundary of the ore room along the length direction of the ore room, the short rock drilling chamber extends from the chisel jumper rock drilling chamber to the other boundary of the ore room and is provided with a plurality of ore drawing horizontal construction roadways and access roads at the lower part of the ore room, the ore drawing horizontal construction roadways comprise a trench draw-bottom roadway and an ore drawing access way (11), the trench draw-bottom roadway is arranged at one boundary of the ore room along the length direction of the ore room, and the ore drawing access way (11) extends from the trench draw-bottom roadway to the other boundary of the ore room and is provided with a plurality of ore drawing access ways; 3) The cutting construction of ore blocks, namely, cutting a raise to the rock drilling level vertically at the end part of a trench bottom roadway of the ore drawing level, and forming a cutting pull groove by taking the cutting raise as a free surface; 4) The construction of mineral block perforation, namely constructing a downward vertical deep hole (16) in a chisel jumper rock chamber of a rock drilling level, constructing a downward fan-shaped deep hole (17) in a short rock drilling chamber, and constructing an upward fan-shaped deep hole (18) in a trench bottom-pulling roadway of a mineral extraction level; 5) Blasting the vertical deep holes (16), the downward fan-shaped deep holes (17) and the upward fan-shaped deep holes (18) serving as blast holes, and then stoping, ore drawing and filling; 6) And repeating the steps 2) -5) to perform stoping of the upper-stage ore room.
2. The method for mining the downward large-diameter deep hole ore room with the efficient rotary section according to claim 1, wherein in the step 2), chisel jumper rock chambers comprise a one-step long drilling chamber (2) and a two-step long drilling chamber (6), two adjacent ore rooms are used as a group, the one-step chisel jumper rock chamber (2) is located at the boundary of one side of one-step mining room of the group, and the two-step long drilling chamber (6) is located at the boundary of the other side of the group.
3. The method for mining the downward large-diameter deep hole ore room with the efficient rotary section according to claim 2, wherein the short rock drilling chambers comprise a one-step short rock drilling chamber (3) and a two-step short rock drilling chamber (7), and the one-step short rock drilling chamber (3) and the two-step short rock drilling chamber (7) in each group of ore rooms are in one-to-one correspondence and are communicated.
4. The method for mining the deep hole mining room with the large diameter downward by the efficient rotary section as claimed in claim 2, wherein the trench draw-down roadway comprises a one-step trench draw-down roadway (12) and a two-step trench draw-down roadway (13), the one-step trench draw-down roadway (12) is positioned at the boundary of one side of the one-step mining room of the group of the mining rooms, the two-step trench draw-down roadway (13) is positioned at the boundary of the other side of the group of the mining rooms, and the ore outlet roadway (15) is arranged between the two mining rooms of each group of the mining rooms along the length direction of the mining rooms.
5. The method for mining the downward large-diameter deep hole ore room with the efficient rotary section according to claim 4, wherein the ore outlet routes (11) in each group of ore rooms are in one-to-one correspondence and are communicated.
6. The method for mining a deep hole with a large diameter in a downward direction, which is a high efficiency turning section according to claim 1, wherein the step 5) is a stoping process, in which a long drilling chamber is stoped first, and a short drilling chamber is stoped after a certain stoping distance.
7. The method for mining a deep hole with a large diameter in a downward direction, according to any one of claims 1 to 6, characterized by the fact that in the step 5), a filling retaining wall (24) is built in the ore outlet route (11) of the ore room after the end of the stoping, and the goaf of the ore room is filled with tailings cemented at the rock drilling level and to the bottom plate of the rock drilling level tunnel.

Description

Efficient rotary section downward large-diameter deep hole ore room mining method Technical Field The invention belongs to the technical field of mining, and particularly relates to a downward large-diameter deep hole mining room mining method with an efficient rotating section. Background The mining method is used for stoping of most underground metal mines (particularly medium-thick to thick large ore bodies) in China by adopting a stoping method of filling the underground metal mines after a stoping process, and is matched with the ore discharge of a trench bottom structure, namely, a rock drilling chamber is horizontally constructed on the upper part of a stoping field, and a vertical stoping channel is formed by drilling down deep holes to trench ore discharge roadways. However, the process has obvious bottleneck in the stage transition (namely, transition from one mining stage to the next stage), namely, after the current stage extraction is completed, 5-8 m high ore pillars (accounting for 8% -12%) are reserved in the upper stage of extraction, then the bottom structure of the upper stage is constructed again, or the original chamber and goaf are filled with roof grafting, the roof grafting rate is more than or equal to 95%, the roof grafting rate is needed, the roof grafting is maintained to be more than or equal to 3MPa, and the structure is restarted in the filling body. The two modes increase the mining and cutting engineering quantity by 30% -40%, additional support is needed, the construction period of the rotary section is prolonged by 2-3 months, and the cutting of the filling body is easy to face the risk of water gushing and side caving. In addition, reserved ore pillars occupy resources, the later recovery cost is high, the ore pillars are easy to destabilize, the drillability of the filling body is poor, and the loss of the drilling machine is increased by 20% -25%. Therefore, the mining method of the high-efficiency transition segment ore room is urgently needed to be applied to the downward large-diameter deep hole ore room, and the problems of difficult filling and roof grafting, high transition segment cost, high risk and the like are solved by reconstructing the stoping-filling-transition segment logic. Disclosure of Invention The invention aims to solve the technical problem of providing a safe, efficient and low-cost continuous downward large-diameter deep hole mining method with efficient rotating sections. In order to solve the technical problems, the invention adopts the technical proposal that 1) ore blocks are divided into a plurality of one-step mining rooms and two-step mining rooms in a disc area; 2) The ore block accurate construction comprises a rock drilling chamber horizontally constructed on the upper part of an ore room, wherein the rock drilling chamber comprises a long rock drilling chamber and a short rock drilling chamber, the chisel jumper rock drilling chamber is arranged at one boundary of the ore room along the length direction of the ore room, the short rock drilling chamber extends from the chisel jumper rock drilling chamber to the other boundary of the ore room and is provided with a plurality of ore drawing horizontal construction roadways and access ways at the lower part of the ore room, and the ore drawing horizontal construction roadways comprise trench bottom-pulling roadways and ore drawing access ways; 3) The cutting construction of ore blocks, namely, cutting a raise to the rock drilling level vertically at the end part of a trench bottom roadway of the ore drawing level, and forming a cutting pull groove by taking the cutting raise as a free surface; 4) The construction of mineral block perforation, namely constructing downward vertical deep holes in chisel jumper rock chambers of a rock drilling level, constructing downward fan-shaped deep holes in a short rock drilling chamber, constructing upward fan-shaped deep holes in a trench bottom-pulling roadway of a mineral extraction level; 5) Blasting by taking the downward vertical deep hole, the downward fan-shaped deep hole and the upward fan-shaped deep hole as blast holes, and then stoping, ore drawing and filling; 6) And repeating the steps 2) -5) to perform stoping of the upper-stage ore room. Further, the step 2), chisel jumper rock chambers comprise a long-drilling-in-one rock chamber and a long-drilling-in-two rock chambers, two adjacent rock chambers are taken as a group, the rock chamber chisel jumper is located at the boundary of one side of the mining chamber of the group, and the rock chamber chisel jumper is located at the boundary of the other side of the group. Further, the short rock drilling chambers comprise a first-step short rock drilling chamber and a second-step short rock drilling chamber, and the first-step short rock drilling chamber and the second-step short rock drilling chamber in each group of the ore rooms are in one-to-one correspondence and are communicated. Further