CN-121993203-A - Segmented filling mining method for downward sector medium-length hole distribution of double-access road

CN121993203ACN 121993203 ACN121993203 ACN 121993203ACN-121993203-A

Abstract

The application discloses a sectional filling mining method of a double-way downward fan-shaped medium-length hole arrangement mode, which belongs to the technical field of mine engineering, wherein a fan-shaped medium-length hole is constructed and arranged in a preset operation space of a two-step mining field, two rows of cannon holes close to the boundary are arranged to be parallel to the boundary of a filling body aiming at a specific position of the boundary of the one-step mining field, and different gun holes distributed in other fan-shaped fields are formed, so that a differential gun hole arrangement mode of the two-step mining field is formed, a blasting stress wave is incident to a boundary of a mineral body and the filling body at a vertical angle, the intensity of a reflected stretching wave is smaller relative to the incident angle at the vertical incidence, and the energy wave transmitted into the filling body is correspondingly reduced, so that internal stretch crack and crack expansion of blasting to the filling body are weakened, and the boundary stability of the filling body is protected.

Inventors

JIANG YONGHENG
WANG ZHIGUO
HOU JUN
ZHANG CHENRUI
Xue Yuanhang
HUANG ZHIPENG

Assignees

长春黄金研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (10)

1. The segmented filling mining method of a kind of double-way downward sector medium-length hole arrangement, characterized by comprising: Arranging a development system; Dividing the segmented ore body into a plurality of one-step mining stopes and a plurality of two-step mining stopes, and constructing to form a bottom pulling space; parallel medium-length holes are formed in the one-step stope, and ore bodies of the one-step stope are detonated and ore is discharged; filling the empty area in the one-step stope; Making sector medium-length holes in a two-step mining stope, wherein two rows of gun holes close to the boundary of the one-step mining filling body are parallel holes parallel to the boundary; Detonating a sector medium-deep hole and a parallel hole in a two-step stope and transporting caving ore; Filling the goaf of the two-step stope.
2. The segmented filling mining method of a double-way downward fan-shaped medium-length hole arrangement according to claim 1, wherein the arrangement development system comprises: Dividing ore blocks into a plurality of sections according to the middle sections, and connecting each section of section-stage tunnel through a disc section slope ramp in each section of lower disc surrounding rock tunneling stage tunnel, wherein a tunneling drop shaft is connected with each section of section-stage tunnel.
3. The segmented filling mining method of a double-access downward sector medium-length hole pattern according to claim 1, wherein the one-step stope width is smaller than the two-step stope width.
4. The segmented filling mining method of the double-entry downward fan-shaped medium-length hole pattern according to claim 1, wherein after the segmented ore body is divided into a plurality of one-step stopes and a plurality of two-step stopes, the segmented filling mining method of the double-entry downward fan-shaped medium-length hole pattern further comprises: Perpendicularly tunneling a drift through tunnel from a stage tunnel to an ore body to form a one-step mining roof-cutting tunnel, and taking the tunnel as an operation space to finish one-step mining roof-cutting to form a roof-cutting layer; constructing and cutting the courtyard in a region, close to the upper disc, of the one-step cutting top layer; parallel medium-length holes are drilled down from the top cutting layer.
5. The segmented filling mining method of the double-access downward sector medium-length hole arrangement mode, which is characterized in that parallel medium-length holes are formed in a one-step stope, ore bodies in the one-step stope are detonated and ore is discharged, 2-3 gun discharging holes are detonated each time, and the detonation row number is gradually increased when the compensation space is enough.
6. The segmented filling mining method of the double-way downward fan-shaped medium-length hole arrangement mode according to claim 1, wherein the step of making the fan-shaped medium-length holes in the two-step stope, and the step of arranging the two rows of cannon holes close to the boundary of the one-step mining filling body into parallel holes parallel to the boundary comprises the following steps: when the one-step filling body reaches the design strength, tunneling a drift-through tunnel and an intra-drift tunnel from the stage tunnel, tunneling two rock drilling tunnels along the boundary of the one-step filling body and forming a cutting tunnel through; Constructing a cutting patio at one end of a cutting roadway, downwards drilling parallel medium-deep holes of a cutting groove, and blasting by taking the cutting patio as a free surface to form a two-step cutting groove; and drilling downward sector medium-deep holes in the two rock drilling roadways, wherein the two groups of downward sector medium-deep holes point to the connecting line symmetry axis of the two rock drilling roadways, and two rows of gun holes close to the boundary of the one-step mining and filling body are parallel holes parallel to the boundary.
7. The segmented filling mining method of the double-access downward sector medium-length hole arrangement mode according to claim 1, wherein after the blasting of the sector medium-length holes and parallel holes in the two-step stope and the transportation of caving ore, the segmented filling mining method of the double-access downward sector medium-length hole arrangement mode further comprises: And pouring the waste rock into the goaf through the stage roadway of the upper section to fill the goaf.
8. The segmented filling mining method of a double-way downward fan-shaped medium-length hole arrangement according to claim 7, wherein after the waste rock is poured into the goaf through the stage tunnel of the upper segment to fill the goaf, concrete is poured on the surface of the goaf filled with the waste rock to form a concrete layer.
9. The segmented filling mining method of a double-way downward sector medium-length hole pattern according to claim 1, wherein the blasting of the sector medium-length holes and parallel holes in the two-step stope and the transportation of caving ore comprises: Blasting sector medium-deep holes and parallel holes in a two-step stope to collapse ores; and tunneling a plurality of ore drawing and passing channels into goafs of the adjacent two-step stope in the one-step stope filling body, and drawing ores through the ore drawing and passing channels.
10. The segmented filling mining method of a double-entry downward fan-shaped medium-length hole arrangement mode according to claim 9, wherein the length direction of the ore drawing drift has an acute included angle with the length direction of the filling body.

Description

Segmented filling mining method for downward sector medium-length hole distribution of double-access road Technical Field The application belongs to the technical field of mine engineering, and particularly relates to a segmented filling mining method of a double-access downward sector medium-length hole distribution mode. Background For the exploitation of thick and large broken ore bodies, the traditional exploitation adopts an upward horizontal layering or approach filling method, but the exploitation is gradually replaced by medium-deep holes due to low construction efficiency, and the medium-deep holes or deep hole blasting matched filling method is widely used for working at present. In the prior art, upward sector medium-length holes are limited by side hole angles, ores on two sides of a rock drilling roadway are difficult to recover, permanent loss is caused, and filling bodies on two sides are easy to disturb and damage. Disclosure of Invention In view of the technical problems existing in the background technology, the application provides a segmented filling mining method of a double-way downward sector medium-length hole distribution mode, which comprises the following steps: Arranging a development system; Dividing the segmented ore body into a plurality of one-step mining stopes and a plurality of two-step mining stopes, and constructing to form a bottom pulling space; parallel medium-length holes are formed in the one-step stope, and ore bodies of the one-step stope are detonated and ore is discharged; filling the empty area in the one-step stope; Making sector medium-length holes in a two-step mining stope, wherein two rows of gun holes close to the boundary of the one-step mining filling body are parallel holes parallel to the boundary; Detonating a sector medium-deep hole and a parallel hole in a two-step stope and transporting caving ore; Filling the goaf of the two-step stope. In some embodiments, the arrangement development system comprises: Dividing ore blocks into a plurality of sections according to the middle sections, and connecting each section of section-stage tunnel through a disc section slope ramp in each section of lower disc surrounding rock tunneling stage tunnel, wherein a tunneling drop shaft is connected with each section of section-stage tunnel. In some embodiments, the one-step stope width is less than the two-step stope width. In some embodiments, after the dividing the segmented ore body into the plurality of one-step stopes and the plurality of two-step stopes, the segmented filling mining method of the downward fan-shaped medium-length hole pattern of the double-access further includes: Perpendicularly tunneling a drift through tunnel from a stage tunnel to an ore body to form a one-step mining roof-cutting tunnel, and taking the tunnel as an operation space to finish one-step mining roof-cutting to form a roof-cutting layer; constructing and cutting the courtyard in a region, close to the upper disc, of the one-step cutting top layer; parallel medium-length holes are drilled down from the top cutting layer. In some embodiments, parallel medium-length holes are made in the one-step stope, and in the process of detonating and ore discharging of ore bodies of the one-step stope, 2-3 gun discharging holes are detonated each time, and the number of detonating rows is gradually increased when the compensation space is enough. In some embodiments, the making a sector medium-length hole in the secondary mining stope, the two rows of cannon holes near the boundary of the primary mining filler being arranged as parallel holes parallel to the boundary, comprising: when the one-step filling body reaches the design strength, tunneling a drift-through tunnel and an intra-drift tunnel from the stage tunnel, tunneling two rock drilling tunnels along the boundary of the one-step filling body and forming a cutting tunnel through; Constructing a cutting patio at one end of a cutting roadway, downwards drilling parallel medium-deep holes of a cutting groove, and blasting by taking the cutting patio as a free surface to form a two-step cutting groove; and drilling downward sector medium-deep holes in the two rock drilling roadways, wherein the two groups of downward sector medium-deep holes point to the connecting line symmetry axis of the two rock drilling roadways, and two rows of gun holes close to the boundary of the one-step mining and filling body are parallel holes parallel to the boundary. In some embodiments, after the blasting the sector medium-deep hole and the parallel hole in the two-step stope and transporting the caving ore, the method of the double-way sublevel filling mining of the sector medium-deep hole arrangement further comprises: And pouring the waste rock into the goaf through the stage roadway of the upper section to fill the goaf. In some embodiments, after the gob is filled by pouring the gob into the gob through the stage roadway of the upper section, conc