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Blasting ore removal method for reducing backstopping two-step mining room filling body caving

A mining method and filling body technology, which is applied in the direction of filling, ground mining, mining equipment, etc., can solve the problems of large amount of filling body caving, raw ore grade dilution, etc., to reduce the frequency of safety accidents, easy to operate, and good The effect of the explosion effect

Active Publication Date: 2020-04-17
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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  • Blasting ore removal method for reducing backstopping two-step mining room filling body caving
  • Blasting ore removal method for reducing backstopping two-step mining room filling body caving
  • Blasting ore removal method for reducing backstopping two-step mining room filling body caving

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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] Such as 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 slotted hole is a vertical deep hole, and the row of holes is an upward fan-shaped deep hole. Preferably, a blasthole drilling positioning device is used to set up a row of holes along the direction of the trench. The blasthole 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 ro...

Embodiment 3

[0058] Such as Figure 5 , Figure 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 sto...

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Abstract

The invention discloses a blasting ore removal method for reducing backstopping two-step mining room filling body caving, and belongs to the field of underground mining. In order to solve the problemsthat in the prior art, the caving amount of a filling body is large and the grade of a raw ore is seriously depleted during secondary backstopping, the blasting ore removal method for reducing backstopping two-step mining room filling body caving is provided, the blasting ore removal method comprises the following steps that when a one-step mining room backstopping is finished, a pull trough areais selectively arranged at the end part or in the middle of a room according to the mining method, the ore quantity is reserved in the pull trough area; a plurality of rows of discharge holes are formed in the trench direction, blasting is carried out for the discharge holes, loosening ore removal is carried out in the trench direction after each row of the discharge holes are blasted; and afterall blasting is finished, balanced ore removal is carried out at the two ends of a trench and an ore removal transverse roadway. According to the blasting ore removal method for reducing backstoppingtwo-step mining room filling body caving, loosening ore removal is carried out after each time of discharge hole blasting, a large amount of ore is removed after complete blasting, the caving of the filling body only covers the topmost layer of the caved ore, so that the influence on the depletion of the raw ore is very small; and the whole steps not only can well protect the filling body, but also 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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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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