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Induced-falling mining method for steep medium-thickness ore with hanging side containing unstable rock stratum

A mining method and steep inclination technology are applied in the field of induced caving mining of steeply inclined medium-thick ore bodies, which can solve the problems of low production efficiency and large ore dilution, and achieve the purpose of reducing ore loss and dilution, efficient mining, and waste reduction. Effect of stone mixing rate

Active Publication Date: 2018-05-18
ANSTEEL GRP MINING CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the pillarless segmental caving method along the veins is widely used in steeply inclined medium-thick ore bodies. For unstable rock masses in the hanging wall, the waste rocks that fall during the mining process are mixed into the ore prematurely, and the ore is greatly diluted. Low production efficiency

Method used

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  • Induced-falling mining method for steep medium-thickness ore with hanging side containing unstable rock stratum
  • Induced-falling mining method for steep medium-thickness ore with hanging side containing unstable rock stratum
  • Induced-falling mining method for steep medium-thickness ore with hanging side containing unstable rock stratum

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Embodiment

[0025] Such as Figure 1 ~ Figure 3 As shown, in this embodiment, the induced caving mining method of the steeply inclined medium-thick ore body containing unstable rock formations in the hanging wall is carried out according to the following steps:

[0026] (1) Pre-mining preparation: excavate the trench roadway 2 in the ore body of the vein-piercing roadway of the stage transportation horizontal development project, and excavate the ore-exit roadway 1 outside the ore body of the vein-piercing roadway. The ore exit roadway 1 is vertically excavated toward the trench roadway 2 and the ore exit crossing 3 is generally 8-12m apart; at the same time, the connecting road 5 of each segment is excavated from the ramp 4, and after the connecting road 5 is excavated through the ore body , excavate the rock-drilling roadway 6 of each mining section in the ore body, and the height of each mining section is 12-18m, generally about 15m;

[0027] (2) Mining operation: during mining, only ...

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Abstract

The invention belongs to the technical field of mining engineering, and particularly relates to an induced-falling mining method for steep medium-thickness ore with the hanging side containing an unstable rock stratum. Ore is crushed by mining pressure, so that the falling time of unstable surrounding rock at the hanging side is prolonged, the ore stope environment is improved, ore loss and dilution is lowered, and production efficiency is improved. The induced-falling mining method is particularly suitable for steep medium-thick ore and steep thick ore which have the features that surroundingrock at the hanging side is poor in stability, ore is hard but has developed joint fissure, and surrounding rock at the heading side is moderately stable.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to an induced caving mining method for steeply inclined medium-thick ore bodies containing unstable rock formations on the hanging wall. Background technique [0002] In the underground caving mining of metal deposits, after the steeply inclined medium-thick ore body is mined to a certain depth, the mining ground pressure increases rapidly with the increase of the mining depth, and the mining quasi-project along the vein is easily damaged by ground pressure, and the working safety conditions become worse, and the production efficiency is reduced, especially when the hanging wall contains unstable rock formations, the surrounding rocks of the hanging wall fall off and the waste rocks are mixed into the ore prematurely, often resulting in premature dilution, and the ore on the footwall side cannot be fully discharged. Cause ore loss and dilution to increase. Af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22
CPCE21C41/22
Inventor 马东任凤玉郑海峰付煜田迎春郭海涛宫国慧李君
Owner ANSTEEL GRP MINING CO LTD
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