Mine ore drawing draw shaft construction method and mine ore drawing draw shaft structure

Abstract

The application discloses a mine ore drawing draw shaft construction method and a mine ore drawing draw shaft structure. The method comprises the following steps: constructing a horizontal transportation roadway and an ore drawing machine chamber under a draw shaft area, and constructing a rock drilling chamber above the draw shaft area; constructing an auxiliary slope above the side of the draw shaft area and above a reserved protection rock pillar; constructing a first blast hole from the rock drilling chamber downwards, and reserving a reserved protection rock pillar at the lower end of the draw shaft area; performing segmented blasting through the first blast hole until the rock drilling chamber is penetrated, then installing an ore drawing machine in the ore drawing machine chamber, wherein a feeding port of the ore drawing machine is located below the draw shaft area, and a discharging port of the ore drawing machine is located in the horizontal transportation roadway; constructing a plurality of second blast holes on the reserved protection rock pillar through the auxiliary slope, and blasting the reserved protection rock pillar through the second blast holes, so that the lower end of the draw shaft area is connected to the ore drawing machine, and thus the draw shaft construction is completed.

Description

Technical Field

[0001] This invention relates to the field of mining construction technology, specifically to a method for constructing a mine ore pass and the structure of a mine ore pass. Background Technology

[0002] Currently, underground mine ore pass construction methods include reverse drilling, deep-hole blasting, and reverse excavation. However, these methods have many disadvantages. The most significant one is that after the ore pass excavation is completed, during the construction of the ore pass foundation and installation of the ore pass, the upper part is a high ore pass empty area. There is a safety hazard of falling loose rocks from the ore pass walls, making safety protection difficult, resulting in a low safety factor, low construction efficiency, and high costs. Summary of the Invention

[0003] To address the above problems, this application discloses a method for constructing a mine ore pass, comprising the following steps:

[0004] Construct horizontal transport roadways and ore discharge machine chambers below the ore pass area, and construct rock drilling chambers above the ore pass area;

[0005] An auxiliary ramp is constructed on the side of the ore pass area and above the reserved protective rock pillar, the auxiliary ramp extending into the ore pass area;

[0006] Multiple vertical first blast holes are drilled downwards from the rock drilling chamber into the ore pass area, and a section of reserved protective rock pillar is reserved at the lower end of the ore pass area. The first blast holes extend downwards to the top of the reserved protective rock pillar.

[0007] The blasting is carried out in stages through the first blast hole until it connects with the rock drilling chamber. Then, the ore feeder is installed in the ore feeder chamber. The feed inlet of the ore feeder is located below the ore pass area, and the discharge outlet of the ore feeder is located in the horizontal transport roadway.

[0008] Multiple second blast holes are constructed on the reserved protective rock pillar through the auxiliary ramp. The reserved protective rock pillar is blasted through the second blast holes, so that the lower end of the ore pass area is connected to the ore discharge machine, thereby completing the ore pass construction.

[0009] Optionally, the ore discharge machine chamber is located on the side of the horizontal transport roadway and below the ore pass area.

[0010] Optionally, several meters can be constructed upwards from the top of the ore-feeding machine chamber to the lower end of the reserved protective rock pillar, as a blasting compensation space for the reserved protective rock pillar.

[0011] Optionally, a T150 drilling rig is used to construct the first blast hole, and a YT-28 drilling rig is used to construct the second blast hole.

[0012] Optionally, the first blast hole is blasted at a height of 5 meters per segment, and the final blast connects to the upper rock drilling chamber.

[0013] Optionally, the number of meters refers to a distance of not less than 2 meters.

[0014] This application also provides a mine ore pass structure, including:

[0015] The first well section is located between the drilling chamber and the top of the reserved protective rock pillar. An auxiliary ramp is provided on its side and above the reserved protective rock pillar. The auxiliary ramp extends into the chute area and serves as the muck removal channel for the construction of the first well section. The drilling chamber is located above the first well section.

[0016] The second section is a reserved protective rock pillar located below the first section. It is used to isolate the connection between the ore discharge machine chamber and the first section during the construction of the first section and the installation of the ore discharge machine. After the ore discharge machine is installed, blasting will allow the ore pass to be connected to the ore discharge machine chamber.

[0017] The third well section is a cavity well section located between the lower end of the reserved protective rock pillar and the ore discharge machine chamber, serving as the blasting compensation space for the reserved protective rock pillar.

[0018] Optionally, the length of the blasting compensation space well section is not less than 2 meters.

[0019] This application has the following beneficial effects:

[0020] (1) A reserved protective rock column is used as a safety barrier for personnel when installing the ore feeder at the bottom. After the ore feeder is installed, the reserved protective rock column is entered through an auxiliary ramp to blast and complete the ore pass construction. This ensures the efficiency of the ore pass construction while completely avoiding the hidden danger of the ore pass being damaged by the side of the wall.

[0021] (2) The upper chute slag discharge can be carried out simultaneously with the ore discharge machine installed in the ore discharge machine chamber, which improves the construction efficiency of the chute. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a mine ore pass according to an embodiment of the present invention. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This embodiment provides a method for constructing a mine ore pass, including the following steps:

[0025] Step S1: Construct a horizontal transport roadway 8 and a ore feeder chamber 10 below the area of ​​the ore pass 3, and construct a rock drilling chamber 1 above the area of ​​the ore pass 3. The ore feeder chamber 10 is located on the side of the horizontal transport roadway 8 and below the area of ​​the ore pass 3. Several meters, preferably 2 meters, are then constructed upwards from the top of the ore feeder chamber 10 to provide blasting compensation space 7 for the upper reserved protective rock pillar.

[0026] The ore discharge chamber 10 is used to house the ore discharge machine 11, which transports the ore falling from the ore pass 3 to the horizontal transport roadway 8, which is used to transport the ore out.

[0027] Step S2: Construct an auxiliary ramp 5 on the side of the area of ​​the chute 3 and above the reserved protective rock pillar 6. The auxiliary ramp is about 5 meters long and extends into the area of ​​the chute 3 to serve as the muck discharge channel of the chute 3.

[0028] Step S3: First, construct the ore pass from the drilling chamber 1 to the auxiliary ramp 5. Using a T150 drilling rig 2, construct multiple vertical first blast holes 4 from the drilling chamber 1 at the upper end of the ore pass 3 area downwards within the ore pass 3 area. Reserve a section of reserved protective rock pillar 6 at the lower end of the ore pass 3 area. The first blast holes 4 extend downwards to the top of the reserved protective rock pillar 6. The reserved protective rock pillar 6 is used to prevent the ore pass wall from falling and injuring people during the construction of the ore pass and the placement of the ore release machine.

[0029] Because of the protective rock pillars, even if pieces of rock break off from the shaft wall during the installation of the ore discharge machine, they will only fall onto the protective rock pillars and will not cause any injury.

[0030] In step S4, explosives are placed in the first blast hole 4 and detonated in stages, with each stage blasting to a height of about 5 meters. The final blast connects to the upper drilling chamber 1. Then, the foundation for the ore feeder 11 can be constructed and the ore feeder 11 can be installed in the lower ore feeder chamber. The feed inlet of the ore feeder 11 is located below the area of ​​the ore pass 3, more specifically, below the blasting compensation space 7, and the discharge outlet of the ore feeder 11 is located in the horizontal transport roadway 8.

[0031] Step S5: After the ore feeder is installed, a second blast hole is drilled on the reserved protective rock pillar 6 using a YT-28 drilling rig via the auxiliary ramp 5. The reserved protective rock pillar 6 is blasted through the second blast hole. The blasting compensation space 7 provides space to accommodate the blasted rock fragments at the moment of explosion. The blasted rock then falls onto the ore feeder 11 and is released onto the mine car 9. At this point, the construction of this ore pass is complete.

[0032] This embodiment provides a mine ore pass structure, which has a horizontal transport roadway 8 and an ore feeder chamber 10 below the area of ​​the ore pass 3, and a rock drilling chamber 1 above the area of ​​the ore pass 3. The ore feeder chamber 10 is located on the side of the horizontal transport roadway 8 and below the area of ​​the ore pass 3.

[0033] The ore pass area includes a first section, a second section, and a third section connected sequentially from top to bottom. The first section is the ore pass section from the drilling chamber 1 to the top of the reserved protective rock pillar. The second section is the reserved protective rock pillar. The third section is the blasting compensation space 7. Several meters, preferably 2 meters, above the top of the ore chute chamber 10 serves as the blasting compensation space 7 for the reserved protective rock pillar.

[0034] The ore discharge chamber 10 is used to install the ore discharge machine 11 after the construction of the rock drilling chamber 1 to the top of the reserved protective rock pillar (i.e., the first section) is completed. The horizontal transport roadway 8 is used to transport the ore that falls from the ore pass 3 after mining production.

[0035] An auxiliary ramp 5 is located on the side of the area of ​​the chute 3 and above the reserved protective rock pillar 6. The auxiliary ramp is about 5 meters long and extends into the area of ​​the chute 3 as a muck discharge channel for the chute 3.

[0036] The first section is used to install multiple vertical first blast holes 4, which extend downwards from the drilling chamber 1 at the upper end of the area of ​​the ore pass 3 to the top of the reserved protective rock pillar 6. The upper end of the ore pass 3 is connected to the upper drilling chamber 1. The feed inlet of the ore feeder 11 is located below the blasting compensation space 7, and the discharge outlet of the ore feeder 11 is located in the horizontal transport roadway 8.

[0037] The reserved protective rock pillar 6 is used to prevent debris from falling from the ore pass wall and injuring personnel during the construction of the ore pass and the installation of the ore discharge machine. Due to the obstruction of the reserved protective rock pillar, even if debris falls from the ore pass wall during the installation of the ore discharge machine, it will only fall onto the reserved protective rock pillar, preventing personal injury.

[0038] The reserved protective rock pillar 6 is used to set a second blast hole on it, and the reserved protective rock pillar 6 is blasted through the second blast hole. The blasting compensation space 7 can provide space to accommodate the blasted rock fragments at the moment of the explosion of the reserved protective rock pillar 6.

[0039] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications are all within the protection scope of the claims of the present invention.

Claims

1. A method for constructing a mine ore pass, characterized in that, Includes the following steps: Construct horizontal transport roadways and ore discharge machine chambers below the ore pass area, and construct rock drilling chambers above the ore pass area; Multiple vertical first blast holes are drilled downwards from the rock drilling chamber into the ore pass area, and a section of reserved protective rock pillar is reserved at the lower end of the ore pass area. The first blast holes extend downwards to the top of the reserved protective rock pillar. An auxiliary ramp is constructed on the side of the ore pass area and above the reserved protective rock pillar, the auxiliary ramp extending into the ore pass area; The blasting is carried out in stages through the first blast hole until it connects with the rock drilling chamber. Then, the ore feeder is installed in the ore feeder chamber. The feed inlet of the ore feeder is located below the ore pass area, and the discharge outlet of the ore feeder is located in the horizontal transport roadway. Multiple second blast holes are constructed on the reserved protective rock pillar via the auxiliary ramp. The reserved protective rock pillar is then blasted through the second blast holes, connecting the lower end of the ore pass area to the ore discharge machine, thereby completing the ore pass construction. The ore discharge machine chamber is located on the side of the horizontal transport roadway and below the ore pass area.

2. The method for constructing a mine ore pass according to claim 1, characterized in that, Several meters are then constructed upwards from the top of the ore-feeding machine chamber to the lower end of the reserved protective rock pillar, serving as the blasting compensation space for the reserved protective rock pillar.

3. The method for constructing a mine ore pass according to claim 1, characterized in that, The first blast hole was drilled using a T150 drilling rig, and the second blast hole was drilled using a YT-28 drilling rig.

4. The method for constructing a mine ore pass according to claim 1, characterized in that, The first blast hole is blasted to a height of 5 meters in each segment, and the final blast connects with the upper rock drilling chamber.

5. The method for constructing a mine ore pass according to claim 2, characterized in that, The number of meters refers to a distance of not less than 2 meters.

6. A mine ore pass structure, characterized in that, include: The first well section is located between the drilling chamber and the top of the reserved protective rock pillar. An auxiliary ramp is provided on its side and above the reserved protective rock pillar. The auxiliary ramp extends into the chute area and serves as the muck removal channel for the construction of the first well section. The drilling chamber is located above the first well section. The second section is a reserved protective rock pillar located below the first section. It is used to isolate the connection between the ore discharge machine chamber and the first section during the construction of the first section and the installation of the ore discharge machine. After the ore discharge machine is installed, blasting will allow the ore pass to be connected to the ore discharge machine chamber. The third section is a hollow section located between the lower end of the reserved protective rock pillar and the ore discharge machine chamber, serving as a blasting compensation space for the reserved protective rock pillar. The ore discharge machine chamber is located on the side of the horizontal transport roadway and below the ore pass area.

7. The mine ore pass structure according to claim 6, characterized in that, The length of the blasting compensation space well section shall not be less than 2 meters.

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