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Method for controlling stope upper and lower disc surrounding rock through medium-deep hole pre-grouting

A pre-grouting and surrounding rock technology, applied in surface mining, underground chambers, mining equipment, etc., can solve problems such as ore dilution under mining, and achieve the effects of improving stability, ensuring safety, and adjusting flexibility.

Inactive Publication Date: 2020-04-14
CHANGCHUN GOLD RES INST
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Problems solved by technology

[0003] In order to overcome the above-mentioned problems, the present invention provides a method for controlling the surrounding rocks of the upper and lower walls of the stope by pre-grouting in medium and deep holes, so as to solve the problem of overexplosion of the upper and lower walls of the steeply inclined ore body when the surrounding rocks of the upper and lower walls of the steeply inclined ore body are relatively broken. The problem of ore dilution caused by the mixing of surrounding rocks in the mining area, this method can reduce the dilution rate index, improve the stability of surrounding rocks in the upper and lower walls of the stope, and increase the safety of equipment and personnel in the stope

Method used

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  • Method for controlling stope upper and lower disc surrounding rock through medium-deep hole pre-grouting
  • Method for controlling stope upper and lower disc surrounding rock through medium-deep hole pre-grouting
  • Method for controlling stope upper and lower disc surrounding rock through medium-deep hole pre-grouting

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the drawings.

[0022] A method for medium-deep hole pre-grouting to control the surrounding rock of the upper and lower walls of the stope, the specific steps are as follows:

[0023] Step 1: Construct a vein-along roadway 4 in each ore body 1 along the direction of the ore body on the two ore blocks;

[0024] Step 2: Arrange the ore penetrating vein 3 vertically on the two ore blocks, and the ore penetrating vein 3 can expose the hanging wall rock 2 and foot wall 6 of the ore body;

[0025] Step 3: At the interface of ore body 1 and surrounding rock 2 of the hanging wall and the interface of ore body 1 and surrounding rock 6 of each ore block, a row of upward fan-shaped drills are drilled with a medium-deep hole drill. Medium and deep grouting hole 5;

[0026] Step 4: Put a grouting pipe 7 into each medium-deep grouting hole 5. One end of the grouting pipe 7 is inserted into the medium-deep grouting hole...

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Abstract

The invention belongs to the technical field of metal mine, and particularly discloses a method for controlling stope upper and lower disc surrounding rock through medium-deep hole pre-grouting. The stope upper and lower disc crushed surrounding rock is strengthened in advance through the medium-deep hole pre-grouting technology, and the integral stability of the stope upper and lower disc surrounding rock is improved. The problem that under the situation of heavy pitch ore body upper and lower disc surrounding rock crushing, during medium-deep hole detonation, the upper and lower disc surrounding rock is mixed in, and consequently explored ore is depleted is solved. According to the method, the technical and safety guarantee is provided for reducing the depletion rate index, improving stability of the stope upper and lower disc surrounding rock and improving operation safety of equipment and personnel in the stope, and the method has the characteristics that the usage degree is wide,and safety and high efficiency are achieved.

Description

Technical field [0001] The invention belongs to the technical field of metal mines, and specifically relates to a method for controlling the surrounding rock of upper and lower walls of a stope by pre-grouting with medium and deep holes. Background technique [0002] At present, in the field of mining steeply inclined ore bodies in metal mines, medium and deep hole blasting technology is more and more widely used. It is mainly used in stope mining. However, when the surrounding rock of the upper and lower walls is relatively broken, the medium and deep hole blasting is used for falling ore. Medium and deep hole blasting is prone to super-explosion, which causes the surrounding rocks of the upper and lower walls to be mixed into the ore, resulting in a higher dilution rate. At the same time, the surrounding rocks of the upper and lower walls are relatively broken and no corresponding measures have been taken to increase the stability of the surrounding rocks of the upper and lower...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21C41/22
CPCE21C41/22E21D11/10
Inventor 刘龙琼宋士生
Owner CHANGCHUN GOLD RES INST
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