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Downward parallel middle-deep hole sublevel fill stoping mining method for steep and medium-thick hard-to-mine ore body

A technology of backfill mining and steep inclination, which is applied in the fields of backfill, mining equipment, earthwork drilling, etc. Effects of increased strength, lower yield stress and viscosity values

Pending Publication Date: 2020-04-10
中国黄金集团石湖矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Statistics on domestic mining information of steeply inclined medium-thick ore bodies show that although the shallow hole ore retention method and wall cutting and filling method are still the main methods for mining steeply inclined medium-thick ore bodies in my country, the labor intensity of workers is high during the mining process. Large potential safety hazards, low production capacity, low production efficiency, etc.

Method used

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  • Downward parallel middle-deep hole sublevel fill stoping mining method for steep and medium-thick hard-to-mine ore body
  • Downward parallel middle-deep hole sublevel fill stoping mining method for steep and medium-thick hard-to-mine ore body
  • Downward parallel middle-deep hole sublevel fill stoping mining method for steep and medium-thick hard-to-mine ore body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A kind of filling material for gobs, including, by weight, 71 parts of full tailings, 8.3 parts of 42.5 grade Portland cement, 11 parts of slag, and 0.7 part of activator; the chemical composition of cement and slag is shown in the table 1. The particle size distribution of the slag is shown in Table 2; the specific gravity, bulk density test and chemical composition analysis of the whole tailings used are carried out, and then the porosity of the whole tailings is obtained from the measured specific gravity and bulk density, and the final tailings obtained Physical properties: loose bulk density (g / cm 3 ) was 1.21, the specific gravity was 2.76, and the porosity (%) was 55.34. The chemical composition analyzed is mainly SiO 2 , Fe 2 o 3 、Al 2 o 3 , CaO, MgO, S, Cu, Au, Ag, etc. The final results of chemical analysis are shown in Table 3, where SiO 2 The content of is relatively high, indicating that the whole tailings is a relatively good inert material, and it c...

Embodiment 2

[0062] A kind of filling material used in gobs, including, by weight, 71 parts of full tailings, 8.3 parts of 42.5 grade Portland cement, 11 parts of slag, and 0.4 part of activator; the chemical composition of cement and slag is shown in the table 1. The particle size distribution of the slag is shown in Table 2; the final results of the chemical analysis of the tailings are shown in Table 3, and the particle size composition is shown in Table 4; acid aluminum.

Embodiment 3

[0064]The concrete is calculated by weight, including 61 parts of full tailings (the final results of the chemical analysis of the whole tailings are shown in Table 3, and the particle size composition is shown in Table 4), 9 parts of 42.5 grade Portland cement (see Table 1 for the chemical composition of cement) , 3.8 parts of basalt short fiber, 2.7 parts of hydroxymethyl cellulose, 0.09 part of sodium hyaluronate, 0.04 part of potassium sodium tartrate, 0.02 part of aluminate coupling agent; wherein, the mass concentration of concrete is 83%; The preparation method is: dissolving hydroxymethyl cellulose and sodium hyaluronate in water to form a colloidal solution with a water-to-binder ratio of 0.25; dissolving basalt short fibers in the colloidal solution so that the basalt short fibers are evenly suspended in the colloidal solution ; Mix the whole tailings, cement, potassium sodium tartrate and water evenly to make semi-finished concrete; mix the colloid solution with basa...

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Abstract

The invention provides a downward parallel middle-deep hole sublevel fill stoping mining method for a steep and medium-thick hard-to-mine ore body, and belongs to the technical field of mining. The ore body is divided into a plurality of sublevels according to the middle sublevel, stope rooms and stope pillars are divided in the ore body direction, the middle sublevel is divided in the inclined direction of the ore body, sublevel rock drilling roadways are arranged along veins, artificial false roofs and false bottoms are constructed in the sublevel rock drilling roadways in advance, and middle-deep hole stoping ore blocks are adopted from top to bottom. After the stope rooms are mined, the stope rooms are filled with filling materials. After the stope pillars are mined, the stope pillarsare filled with full tailings and / or barren rock powder. The content of particles with the particle size being less than or equal to 30[mu]m in the full tailings for the filling materials accounts for75-77%; the content of the particles with the particle size being less than or equal to 35[mu]m in slag accounts for 86-88%; and an activator is prepared from glauberite and green vitriol with a weight ratio of 1 to (0.5-0.7). According to the downward parallel middle-deep hole sublevel fill stoping mining method, safe, efficient and low-cost mining of the ore body can be realized, continuous mining in an area can be realized, and the sublevel fill stoping mining method is mainly suitable for a gold mine with an inclination of 50-90 degrees and a horizontal thickness of 4-10 m.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a mining method for segmentally filling a steeply inclined medium-thick and difficult-to-mining ore body downward toward parallel medium-deep holes. Background technique [0002] In the underground mining of metal deposits, steeply inclined medium-thick ore bodies account for about 20%, which is a special type of difficult-to-mining ore body. The mining of steeply inclined medium-thick ore bodies in my country has a long history. For the problems existing in the mining process, some mines and scientific research institutes have carried out a lot of research, put forward a variety of reasonable and effective methods, and achieved good results. The mining method of this type of ore body can be divided into two categories according to its falling method: shallow hole falling and medium and deep hole falling. Shallow hole ore caving mainly includes shallow hole ore retenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00
CPCE21F15/00E21F15/005
Inventor 耿晓飞张文龙李亚鹏孙吉鹏孙晓军
Owner 中国黄金集团石湖矿业有限公司
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