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Open stope-caving combined mining method

A mining method and empty field technology, which can be used in surface mining, underground mining, special mining, etc., can solve problems such as ore loss and dilution, and achieve the effects of low loss and dilution, simple process and low cost.

Active Publication Date: 2011-02-09
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

However, due to the excessive influence of the inclined wall during mining, the ore loss and dilution are relatively large

Method used

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  • Open stope-caving combined mining method
  • Open stope-caving combined mining method
  • Open stope-caving combined mining method

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with drawings and embodiments.

[0014] Such as figure 1 , figure 2 , image 3 As shown, each mining ore block of the present invention is composed of a top pillar, and an empty field falling section and its roadway arranged along the ore body direction, a caving recovery section and its roadway, and a mine shaft.

[0015] In the present invention, the segmental mining of the next empty field ore falling lags behind the previous section by 5-10m, and the ore is extracted in the empty field by the segmented ore until the end mouth is slightly open; Design the location of the mining approach along the vein according to the principle of conformity with the shape of the block, and draw the ore to the cut-off grade; the operation site needs to be more than 5m away from the edge of the block landing point, and the roadway connected with the goaf should be blocked. The method of blocking is to stack Waste...

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Abstract

The invention relates to the field of underground mine mining process, especially to an open stope-caving combined mining method suitable for mining minerals of which the orebody inclination angle is between 60 DEG and 90 DEG and the thickness is less than 10m. The method is characterized in that each mining ore block consists of a support pillar, an open-stope caving sublevel and a roadway thereof, a caving recovery sublevel and a roadway thereof, an ore chute and the like, wherein the open-stope caving sublevel is arranged along the strike direction of the orebody. The mining scheme has the advantages of simple process, safe production, low cost, high production efficiency, low loss and dilution and the like and is easy to manage. The ore recovery ratio of ore blocks is increased to 75% from about 50%; the ore dilution rate is controlled below 15%; and the mining production capacity is improved from the current 200 tons per day to 350 tons per day. With the gradually reduced thick and large orebodies which are easy to exploit, the requirement on efficiently mining thin ore bodies is more and more urgent, and therefore the method of the invention has very strong competitive power in the mining technical field at home and abroad and has broad application prospect.

Description

technical field [0001] The invention relates to the technical field of underground mining technology, in particular to an open field-caving combined mining method suitable for mining minerals with an inclination angle of 60°-90° and a thickness within 10m. Background technique [0002] At present, the shallow hole retention method is commonly used in the mining of steeply inclined medium-thick ore bodies, especially in small and medium-sized mines with complex ore-body occurrence conditions. The method has the advantages of simple process and equipment, convenient production management, and easy mastery by workers. However, this method of ore pillar recovery is complicated in technology, low in efficiency, high in operating cost, low in recovery rate, and high in dilution rate, resulting in permanent loss of mineral resources in the ground and secondary recovery cannot be performed. For the steeply inclined medium-thick body, it is also common to use the pillarless sub-leve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16
Inventor 郭友学郑海峰高常胜陈晓云
Owner ANSTEEL GRP MINING CO LTD
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