CN114322689A

CN114322689A - Ore draw shaft bottom blockage treatment method

Info

Publication number: CN114322689A
Application number: CN202011035495.3A
Authority: CN
Inventors: 吴荣高
Original assignee: Nanjing Baodi Meishan Industrial City Development Co ltd; Shanghai Meishan Iron and Steel Co Ltd
Current assignee: Nanjing Baodi Meishan Industrial City Development Co ltd; Shanghai Meishan Iron and Steel Co Ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2022-04-12
Anticipated expiration: 2040-09-27
Also published as: CN114322689B

Abstract

The invention relates to a method for treating bottom blockage of an ore pass, which comprises the following steps: the method comprises the steps of arranging a vertical ladder, arranging an operation platform, arranging a blasting window, observing the blocking condition, determining a treatment scheme, treating explosive package arrangement, treating explosive package in place, blocking treatment and the like. The ore chute bottom blockage treatment method provided by the invention realizes that when a mine using chute ore drawing is blocked at the bottom of the chute, the blasting explosive charge safely and effectively approaches to a blockage point at the bottom of the chute through a specially-arranged system path, and the blasting shock wave generated after detonation loosens the ore at the blockage position, and falls to dredge. The construction of the invention is simple, newly-built and under-built mines can be constructed and matched according to the design of the invention when the orepass is constructed and installed, and the mines in production can be used after being constructed and repaired according to the design of the invention.

Description

Ore draw shaft bottom blockage treatment method

Technical Field

The invention relates to a method for treating bottom blockage of an ore pass, and belongs to the technical field of metal deposit mining.

Background

The metal deposit mining adopts both open-pit mining and underground mining modes, and involves the use of drop shafts, particularly underground mining, and a large number of drop shafts are used. The ore in the chute is put on a mine car with horizontal transportation through a vibration ore drawing device arranged at the bottom. The ore in the ore pass moves downwards by means of gravity and is influenced by factors such as the granularity, the grain size, the mud content, the water content of the ore entering the ore pass, the dynamic change of the ore position in the ore pass and the like, the phenomenon of blockage frequently occurs in the ore drawing process of the ore pass, and the blockage mainly occurs at the bottom of the ore pass. The existing treatment method comprises the steps of entering the ore drawing hole at the bottom of the orepass and treating a blocking point by using high-pressure water or placing an explosive package, wherein the treatment method is effective when the blocking point is low, the treatment method is extremely poor in treatment effect when the blocking point is high and the treatment method is difficult to access by flushing or placing the explosive package, and meanwhile, the safety risk of personnel entering the operation from the ore drawing hole at the bottom is extremely high.

Disclosure of Invention

The invention aims to solve the technical problems that: the method overcomes the defects of the technology and provides the ore draw shaft bottom blockage processing method which adopts a safe and effective channel or path to realize that the explosive charge and the detonating device thereof are conveyed to or close to the blockage part at the bottom of the draw shaft, and then the ore at the blockage part is detonated and vibrated to be loosened and fall until the blockage part is dredged.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a method for treating bottom blockage of an ore pass comprises the following steps:

step 1: arranging a straight ladder; arranging a nearly vertical steel ladder outside a vibration ore drawing machine in the ore drawing chamber;

step 2: setting a working platform; a blockage treatment operation platform is arranged above the ore drawing opening of the vibration ore drawing machine;

and step 3: setting a blasting window; opening an upward oblique window on a retaining wall above a ore drawing opening of the vibration ore drawing machine and lining the window with a steel plate;

and 4, step 4: observing the blocking condition; an operator climbs the straight ladder in the ore drawing chamber, climbs the operation platform, and observes the blocking condition in the shaft of the draw shaft through the blasting window;

and 5: determining a processing scheme; determining a treatment scheme according to the blocking condition in the shaft of the draw shaft;

step 6: treating the medicine bag for finishing; after receiving required explosives and blasting equipment, an operator manufactures benefit management explosive bags on a ground in the ore drawing chamber;

and 7: treating the medicine package in place; the working platform is reached through the straight ladder again; conveying the processing explosive package and the explosive package conveying telescopic rod to the operation platform; the two persons cooperate to send the treatment explosive to the lower end face blocked in the shaft of the draw shaft through the blasting window by means of the explosive feeding telescopic rod, the explosive feeding telescopic rod is fixed, and the detonating line of the treatment explosive is led out to the initiation point;

and 8: carrying out blocking treatment; and (6) carrying out point blasting.

The scheme is further improved in that: and after the step 8, if the blockage in the shaft of the drop shaft cannot be solved, repeating the steps 4 to 8 until the blockage in the shaft of the drop shaft is solved.

The ore chute bottom blockage treatment method provided by the invention realizes that when a mine using chute ore drawing is blocked at the bottom of the chute, the blasting explosive charge safely and effectively approaches to a blockage point at the bottom of the chute through a specially-arranged system path, and the blasting shock wave generated after detonation loosens the ore at the blockage position, and falls to dredge. The construction of the invention is simple, newly-built and under-built mines can be constructed and matched according to the design of the invention when the orepass is constructed and installed, and the mines in production can be used after being constructed and repaired according to the design of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the present invention.

Fig. 2 is a side view of fig. 1.

Detailed Description

Examples

The method for treating the bottom blockage of the ore pass of the embodiment, as shown in figures 1 and 2, comprises the following steps:

step 1: arranging a straight ladder 10; arranging a nearly vertical steel ladder outside a vibration ore drawing machine in the ore drawing chamber; the vertical ladder 10 is welded and fixed with the chamber wall by adopting a grouting anchor rod, and the installation angle of the vertical ladder 10 is arranged at 70-90 degrees relative to the horizontal plane on site;

step 2: setting a working platform 11; installing an operation platform 11 which is prefabricated by a platform pedal net and has the width of 60-80 cm at a position 20-30 cm above the ore drawing port 12 of the vibration ore drawing machine, and welding and fixing two ends of the operation platform with a chamber wall by adopting grouting anchor rods;

and step 3: setting a blasting window 7; excavating an explosion window 7 with the width of 40cm, the height of 60cm and the inclined upward angle of 55-60 degrees on a retaining wall 8 which is 60cm above the ore drawing opening 12 of the vibration ore drawing machine and in the middle line direction of a shaft of the drop shaft, and lining a prefabricated steel plate frame; newly building and building a mine, and placing a prefabricated steel plate frame when a mine opening retaining wall 8 is poured to form a blasting window 7;

and 4, step 4: observing the blocking condition; 4. an operator climbs a straight ladder 10 from a floor 13 of the ore drawing chamber, climbs an operation platform 11, and observes the blocking condition in the shaft of the chute through a blasting window 7;

step 6: treating the medicine bag for finishing; after receiving required explosives and blasting equipment, operators manufacture beneficial treatment cartridges 5 on a floor 13 in the ore drawing chamber;

and 7: treating the medicine package in place; the working platform 11 is reached through the straight ladder 10 again; conveying the processing explosive bag 5 and the explosive bag conveying telescopic rod 4 to an operation platform 11; the two persons cooperate to send the treatment explosive package 5 to the blocked lower end face 3 in the shaft of the draw shaft through the blasting window 7 by means of the explosive package feeding telescopic rod 4, the explosive package feeding telescopic rod 4 is fixed, and the detonating line 6 of the treatment explosive package is led out to the detonating point;

and 8: carrying out blocking treatment; and (6) carrying out point blasting.

And 8, after the step 8, if the blockage in the shaft of the drop shaft cannot be solved, repeating the steps 4 to 8 until the blockage in the shaft of the drop shaft is solved.

The present invention is not limited to the above-described embodiments. All technical solutions formed by equivalent substitutions fall within the protection scope of the claims of the present invention.

Claims

1. The method for treating the blockage at the bottom of the ore pass is characterized by comprising the following steps of:

and 8: carrying out blocking treatment; and (6) carrying out point blasting.

2. The ore pass bottom plug treatment method of claim 1, characterized by: and after the step 8, if the blockage in the shaft of the drop shaft cannot be solved, repeating the steps 4 to 8 until the blockage in the shaft of the drop shaft is solved.