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A method of blasting ore extraction to reduce the collapse of the filling body in the two-step mining room

A mining method and backfill technology, which are applied in the fields of backfill, ground mining, mining equipment, etc., can solve the problems of large collapse of the backfill and depletion of raw ore grade, and achieve the purpose of reducing the frequency of safety accidents, easy operation, and reducing The effect of human and material cost

Active Publication Date: 2022-05-13
安徽马钢罗河矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art that the filling body caving is large and the raw ore grade is seriously depleted during the two-step mining, the present invention provides a blasting ore mining method that reduces the caving of the filling body in the two-step mining room

Method used

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  • A method of blasting ore extraction to reduce the collapse of the filling body in the two-step mining room
  • A method of blasting ore extraction to reduce the collapse of the filling body in the two-step mining room
  • A method of blasting ore extraction to reduce the collapse of the filling body in the two-step mining room

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Effect test

Embodiment 1

[0042]The mining method is mainly for the ore body thickness of more than 60m in the vertical deep hole stage, and the mining method of ore mining in the segmented rock drilling stage is mainly for the ore body thickness of 30-60m and the segmented empty stop and then filling mining method. For the ore body thickness of 20-30m, there are three main methods, and the three methods are divided into two steps of mining: one-step mining room and two-step mining room; construction of one-step bottom roadway and one-step mining room recovery. The filling is completed, and now the large-scale mining of the second-step mining room is started, and the second-step bottoming roadway is constructed for the second-step mining work. However, because the strength of the tailings cemented filling body cannot be compared with the hardness of the original ore, it is now facing large-scale mining. Under the action of ground pressure and blasting during room blasting, when a large-volume goaf is fo...

Embodiment 2

[0051] like figure 1 and figure 2 As shown, it is basically the same as in Example 1, and what is different from Example 1 is that the present embodiment is aimed at the subsection empty field and then filling mining method. When the method is carried out in the two-step mining room back mining, the preliminary work is as follows: the mining method mine room The height is 20-30m, and one segmental mining, the slotting holes are vertical deep holes, and the row holes are upward fan-shaped deep holes. The punching positioning device comprises a positioning rod, the top of the positioning rod is horizontally fixed with a telescopic rod, the top of the telescopic rod is upwardly fixed with an angle measuring instrument, the angle measuring instrument is provided with a laser emitter, and the telescopic rod includes an outer rod and an inner rod, the outer rod The rod and the inner rod are fixed by a fixed ring, and a rubber ring is arranged in the fixed ring. The rubber ring has...

Embodiment 3

[0058] like Figure 5 , Image 6 and Figure 9 As shown, it is basically the same as in Example 2. The difference from Example 2 is that this example is aimed at the large-diameter vertical deep hole stage empty field and then filling mining method. When this method is used for two-step mining room recovery, the preliminary work is as follows: The two-step mining of this method is divided into two stages of mining. The upper segment row of holes is a large-diameter hole with a depth of 50-55m downward vertical deep holes, and the lower segment row of holes is an upward fan-shaped deep hole of 20-30m. 85m, the slotting hole is divided into two vertical deep holes for slotting. Therefore, the upper row of holes in the mine room is a large-diameter vertical deep hole, and the lower row of holes is an upward fan-shaped hole. It belongs to a high-level mine room, and the blasting control requirements are relatively High, before the stope is put into production, a detailed stope b...

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Abstract

The invention discloses an ore extraction method by blasting for reducing the collapse of a filling body in a two-step mining room, and belongs to the field of underground mining. Aiming at the problems in the prior art that the filling body caving is large and the raw ore grade is seriously diluted during the secondary mining, the present invention provides a blasting ore mining method that reduces the caving of the filling body in the second-step mining room, which includes the following Steps: When the mining of the one-step mining room is completed, according to the mining method, a channel area is selected at the end or middle of the mine room, and the amount of ore is reserved in the channel area; several rows of holes arranged along the direction of the trench are blasted, and After each row of hole blasting, the ore is loosened from the direction of the trench; after all the blasting is completed, the ore is balanced at both ends of the trench and the ore-exiting horizontal lane. In the present invention, the ore is loosened after each hole blasting, and a large amount of ore is extracted after complete blasting. The collapse of the filling body only covers the top layer of the collapsed ore, which has little effect on the dilution of the original ore; the whole can not only protect the filling body, and at the same time can achieve a good blasting effect.

Description

technical field [0001] The invention belongs to the technical field of underground mining, and more specifically relates to a blasting mining method for reducing the collapse of filling body in a two-step mining room. Background technique [0002] As our country pays more and more attention to safety and environmental protection, the filling mining method that has less impact on the environment has gradually become one of the main mining methods for metal and non-metal mines; especially the tailings cemented filling mining method, not only can be compared It can reduce or even avoid the construction of tailings ponds, and can effectively control the ground pressure. At present, many large underground metal or non-metallic mines in my country adopt tailings cemented filling mining method, and the tailings cemented filling mining method will inevitably face the collapse of the filling body of the one-step mining room on both sides when the two-step mining room or ore pillar is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/22E21F15/00
CPCE21C41/22E21F15/00
Inventor 袁锦锋刘康何晓文魏福海王忠强郏威曹涧泉
Owner 安徽马钢罗河矿业有限责任公司
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