CN-122014253-A - Medium-length hole rock drilling side ore discharging subsequent filling mining method suitable for gently-inclined thick and large ore body

CN122014253ACN 122014253 ACN122014253 ACN 122014253ACN-122014253-A

Abstract

The invention discloses a medium-length hole rock drilling side ore discharging subsequent filling mining method suitable for a gently inclined thick and large ore body, which is suitable for the gently inclined thick and large ore body stoping with medium stability and unstable surrounding rock. The ore body adopts the segmentation from bottom to top to stope, divides into the dish district in the segmentation, and the stope is perpendicular to ore body trend in the dish district and is divided into a route stope and a plurality of medium-length hole stopes, and the route stope is arranged in the intermediate position of dish district along the ore body trend direction, and the medium-length hole stope is arranged to the both sides symmetry of route stope. When stopes in the disc zone are stoped, stopes are stoped from two sides of the disc zone to the middle position, two medium-length hole stopes with two symmetrical sides are stoped synchronously, and finally, a middle approach stope is stoped, and a triangular ore belt on the upper disc of the medium-length hole stope and the approach stope adopt an approach method simultaneously for stoping. The invention has the advantages of safe stoping operation, large production capacity, high efficiency and the like.

Inventors

LI QIUXIAO
QIU JUNGANG
PENG KANG
LIANG XIAOPENG
PANG ZIHAO
ZHANG XUFEI
Chang Yangkai
Diao Yanlong
DONG JIANWEI
CHEN GUANGYUAN

Assignees

山东黄金矿业(莱州)有限公司焦家金矿
中南大学

Dates

Publication Date: 20260512
Application Date: 20260326

Claims (8)

1. The medium-length hole rock drilling side ore removal subsequent filling mining method suitable for the gently inclined thick and large ore body is characterized by comprising the following steps of: (1) The mining method comprises the steps of dividing a mining field and carrying out mining in a segmented mode from bottom to top, wherein the segmented mode is internally divided into a disc area, the mining field in the disc area is perpendicular to the trend of the mining body and is not provided with a column, the disc area is internally divided into an access mining field and a plurality of medium-length mining fields, the access mining field is arranged at the middle position of the disc area along the trend direction of the mining body, the medium-length mining fields are symmetrically arranged at two sides of the access mining field; (2) The method comprises the steps of arranging a mining standard cutting engineering, digging an ore inlet and outlet connecting roadway from the center of a sublevel transportation roadway of a lower disc perpendicular to the direction of an ore body along a disc area access stope, digging an ore inlet and outlet access roadway from the ore outlet connecting roadway along the direction of the ore body to medium-length hole stopes on two sides to form a bottom ore outlet structure of the medium-length hole stope, communicating the ore outlet access roadway from the bottom center of the medium-length hole stope perpendicular to the direction of the ore body, and digging a cutting courtyard and a cutting cross roadway outside the position of a triangulated ore belt of the upper disc; (3) Filling and stoping a medium-length hole stope, namely firstly adopting a drill jumbo to construct a parallel medium-length hole in a cutting horizontal roadway, constructing a sector medium-length hole in the drill roadway, blasting by taking a cutting courtyard as a free surface to form a full-section cutting groove, then taking the cutting groove as a free surface for retreating ore caving, shoveling ore by adopting a scraper through an ore-drawing connecting roadway and an ore-drawing inlet way at one side of the stope, and after ore drawing is finished, building a filling retaining wall at each inlet and outlet at the bottom of the stope, filling the stope by adopting a cementing filler, and abutting; (4) And during layered stoping, firstly constructing the layered connecting channel to the elevation of a stoping layered bottom plate, constructing a horizontal connecting channel from the end part of the layered connecting channel to the upper disc boundary of the ore body at the stoping site, stoping the layered medium-deep hole stoping site upper disc triangular ore belt towards the two side approach methods, and stoping the layered stoping site after the stoping of the medium-deep hole stoping site upper disc triangular ore belt at the two sides of the layered layer is finished.
2. The medium-length hole drilling side ore discharge subsequent filling mining method for the slowly inclined thick and large ore bodies, which is disclosed in claim 1, is characterized in that the sectional height is 15-25m, and the method is determined according to comprehensive consideration of the stability of ore rocks, the inclination angle of the ore bodies, the thickness of the ore bodies and the grade of the ore bodies.
3. The medium-length hole side rock drilling ore-discharging subsequent filling mining method suitable for the gently inclined thick and large ore bodies, according to claim 1, is characterized in that the width of the medium-length hole stope is 10-12m, the width of the approach stope is 8-10m, the widths of the medium-length hole stope and the approach stope are determined specifically according to the rock stability, the medium-length hole stope takes a large value when the rock stability is good, and the medium-length hole stope takes a small value when the rock stability is poor.
4. The medium-length hole rock drilling side ore discharging subsequent filling mining method suitable for the slowly-inclined thick and large ore bodies, which is characterized in that the section size of a route is 3m multiplied by 3m to 6m multiplied by 6m when the triangular ore belt of the route stope and the medium-length hole stope is stoped, the specific size is determined according to the stability of ore, the large value is taken when the stability of ore is good, and the small value is taken when the stability of ore is poor.
5. The medium-length hole drilling side ore drawing and subsequent filling mining method suitable for the gently inclined thick and large ore bodies, according to claim 1, is characterized in that the ore drawing paths start to tunnel from an ore drawing combined roadway to two sides, the ore drawing paths on the two sides are arranged in a staggered mode, and the end parts of the ore drawing paths tunnel to the positions of drilling roadways of two medium-length holes stopes on the outermost side of a disc zone.
6. The medium-length hole rock drilling side ore discharge subsequent filling mining method suitable for the gently inclined thick and large ore bodies, according to claim 1, wherein the distance from the segmented conveying roadway to the lower disc boundary of the ore bodies is required to meet the requirement of a track-free device entering and exiting stope on climbing gradient when the upward approach filling method is adopted by an approach stope.
7. The method for medium-length hole rock drilling side ore discharge and subsequent filling mining of a slowly inclined thick ore body according to claim 1, wherein the 28-day uniaxial compressive strength of the adopted cemented filling body is required to be more than or equal to 1.5-2.0MPa during filling of the medium-length hole stope.
8. The medium-length hole drilling side ore-drawing and subsequent filling mining method suitable for the gently inclined thick and large ore bodies according to claim 1, wherein the 28-day uniaxial compressive strength of the adopted cemented filling body is required to be more than or equal to 1.0-1.5MPa during filling of the approach stope.

Description

Medium-length hole rock drilling side ore discharging subsequent filling mining method suitable for gently-inclined thick and large ore body Technical Field The invention belongs to the field of underground mining, and particularly relates to a side ore discharging and subsequent filling mining method suitable for medium-deep hole rock drilling of a gently inclined thick ore body, which is particularly suitable for stoping the gently inclined thick ore body with a middle stability of more than a middle stability and unstable upper disc surrounding rock. Background For a gently inclined thick and large ore body with a middle stability and an unstable upper disc surrounding rock, as the broken upper disc surrounding rock of the ore body does not allow a larger exposure area and exposure time, a caving method or an upward horizontal layered filling method is generally adopted to recover the ore body of the type in order to avoid the influence of the collapse of the upper disc surrounding rock on the operation safety and the large loss dilution. When stoping by adopting a caving method, although goaf can be eliminated through actively caving surrounding rock, as the upper disc surrounding rock is extremely unstable, advanced or unintended delamination and caving are extremely easy to occur in the ore caving process, so that ore loss and depletion rate are difficult to control, meanwhile, the mobility of caving ore is poor due to the inclination angle of ore bodies of the slowly inclined thick and large ore bodies, blocking or cutting is easy to occur when the overlying rock is put down for ore drawing, and the upper disc broken surrounding rock is easy to mix into the ore, so that ore drawing grade is seriously influenced. When the upward horizontal layered filling method is adopted for stoping, the exposed area of the upper-disc surrounding rock can be effectively controlled, the ore depletion is effectively controlled, but the primary ore collapse amount of a stope is small, the production efficiency of the stope is low, the production capacity is small, more importantly, personnel and equipment are always exposed under the rock mass with a large area for a long time for operation, and the potential safety hazard is large. Therefore, how to reduce the potential safety hazard during stoping and simultaneously improve the production capacity and efficiency of a stope is always a great technical problem of stoping of the ore bodies of the type. Therefore, the invention provides a medium-length hole rock drilling side ore discharging subsequent filling mining method suitable for a gently inclined thick and large ore body, and aims to solve the problem of safe and efficient mining of the gently inclined thick and large ore body with medium stability and unstable surrounding rock. Disclosure of Invention In order to solve the technical problems, the invention provides a medium-length hole rock drilling side ore discharging and subsequent filling mining method suitable for a gently inclined thick ore body, which comprises the following steps of: (1) The mining method comprises the steps of dividing a mining field and carrying out mining in a segmented mode from bottom to top, wherein the segmented mode is internally divided into a disc area, the mining field in the disc area is perpendicular to the trend of the mining body and is not provided with a column, the disc area is internally divided into an access mining field and a plurality of medium-length mining fields, the access mining field is arranged at the middle position of the disc area along the trend direction of the mining body, the medium-length mining fields are symmetrically arranged at two sides of the access mining field; (2) The method comprises the steps of arranging a mining standard cutting engineering, digging an ore inlet and outlet connecting roadway from the center of a sublevel transportation roadway of a lower disc perpendicular to the direction of an ore body along a disc area access stope, digging an ore inlet and outlet access roadway from the ore outlet connecting roadway along the direction of the ore body to medium-length hole stopes on two sides to form a bottom ore outlet structure of the medium-length hole stope, communicating the ore outlet access roadway from the bottom center of the medium-length hole stope perpendicular to the direction of the ore body, and digging a cutting courtyard and a cutting cross roadway outside the position of a triangulated ore belt of the upper disc; (3) Filling and stoping a medium-length hole stope, namely firstly adopting a drill jumbo to construct a parallel medium-length hole in a cutting horizontal roadway, constructing a sector medium-length hole in the drill roadway, blasting by taking a cutting courtyard as a free surface to form a full-section cutting groove, then taking the cutting groove as a free surface for retreating ore caving, shoveling ore by adopting a scraper through an ore-drawing c