Novel technique of slight-pitch ore body overall mining method

A kind of gently inclined, mining method technology, applied in the direction of surface mining, underground mining, special mining, etc., can solve the problem of affecting the mining capacity, etc., to reduce the reserved natural ore pillars, reduce the loss rate and dilution rate, improve the recovery rate effect

Active Publication Date: 2009-02-18
LINGBAO CITY JINYUAN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondly, at present, when using the comprehensive method to promote mining to a slope of more than 20 meters, manpower is mainly used to pick up ore from the working face of the stope, which is time-consuming and labor-intensive, which seriously affects the mining capacity.

Method used

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  • Novel technique of slight-pitch ore body overall mining method
  • Novel technique of slight-pitch ore body overall mining method
  • Novel technique of slight-pitch ore body overall mining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Taking a 425-meter middle section 9# gold mine stope as the stope object of this embodiment, the specific mining operation steps are as follows:

[0018] (1) Nugget layout and constituent elements

[0019] like image 3 As shown, the 425m lower middle section 1 along the vein roadway exposes the ore body 6 with a strike length of 39m, the average thickness of the ore body 6 is 2.80m, the average inclination angle α of the ore body 6 is 28°, the 425m lower middle section 1 and the 450m 450m upper middle section 7 The inclined length of the stage is 53 meters, the bottom pillar is 9 meters thick and 3 meters thick. The reserved natural ore pillars are flexibly reserved according to the grade of the ore body and the firmness of the roof.

[0020] (2) Adopt quasi-cutting work

[0021] In the ore body 6 exposed by the level road in the first stage of the lower and middle section of 425 meters, the tunnel 3 is connected with the pedestrians 2 and the upper and middle sectio...

Embodiment 2

[0028] Taking a 450-meter middle section 3# gold mine stope as the stope object of this embodiment, the specific mining operation steps are as follows:

[0029] (1) Nugget layout and constituent elements

[0030] like image 3 As shown, the 450-meter lower middle section 3 along the vein roadway exposes the ore body 6 with a strike length of 53 meters, the average thickness of the ore body 6 is 2.90 meters, and the average inclination angle α of the ore body 6 is 27°. The oblique length of the stage is 55 meters, the bottom pillar is 9 meters thick and 3 meters thick. The reserved natural ore pillars are flexibly reserved according to the grade of the ore body and the firmness of the roof.

[0031] (2) Adopt quasi-cutting work

[0032] In the ore body 6 exposed by the level road in the first stage of the 450-meter lower and middle section, the tunnel 3 is connected to the pedestrians 2 and the 475-meter upper and middle section 7 to form a return air and pedestrian safety sy...

Embodiment 3

[0037] Taking the 5# gold mine stope in the middle section of a 575 as the stope object of this embodiment, the specific mining operation steps are as follows:

[0038] (1) Nugget layout and constituent elements

[0039] like image 3 As shown, the 575-meter lower middle section 3 exposes the ore body 6 along the vein roadway with a strike length of 60 meters, the average thickness of the ore body 6 is 2.75 meters, and the average inclination angle α of the ore body 6 is 29°. The sloping length of the stage is 52 meters, the bottom pillar is 9 meters thick and 3 meters thick. The reserved natural ore pillars are flexibly reserved according to the grade of the ore body and the firmness of the roof.

[0040] (2) Adopt quasi-cutting work

[0041]In the ore body 6 exposed in the first stage of the 575-meter lower and middle section, the excavation and cutting uphill 3 connects with the pedestrian uphill 2 and the 600-meter upper middle section 7 to form a return air and pedestri...

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Abstract

The invention belongs to gently inclined orebody mining field and in particular discloses a new gently inclined orebody overall mining method, including the following steps: digging a pedestrian rise entry and an incision rise entry which are communicated with the upper middle section in the orebody disclosed in a drift at the lower middle section; constructing an undercutting drift at the mouth of the incision rise entry; digging ore passes at a bottom pillar; constructing two layers of incision drifts at the incision rise entry; starting the stopping process after mining and incising processes are finished; increasing the rise entry gradient Alpha between the mouth of the incision rise entry and the two layers of incision drifts to Beta 40-90 degrees by bottom-chopping engineering. Compared with prior art, the new gently inclined orebody overall mining method increases incision drifts and extracts almost all the ores, thus improving stopping rate. With a plurality of working faces operate at the same time, the new mining method increases ore-drawing capacity, reduces reserved natural ore pillars and reduces ore loss ratio and ore dilution ratio. Through bottom-chopping engineering, the new mining method increases the riser entry gradient between the mouth of the incision riser entry and the two layers of incision drifts, thus greatly increasing ore transportation efficiency and increasing ore-drawing capacity.

Description

technical field [0001] The invention belongs to the mining field of gently inclined ore bodies, and particularly relates to a new technology of a comprehensive mining method of gently inclined ore bodies. Background technique [0002] At present, for gently inclined ore bodies, the general mining method is generally adopted. The characteristics of the comprehensive mining method are: the ore blocks do not need to be regularly divided into the ore house and the ore pillar, and the working face is fully advanced along the strike or along the inclination or reverse inclination, and the whole layer is mined. figure 1 is a typical longitudinal projection schematic diagram of the existing technology of the comprehensive mining method of the gently inclined ore body, figure 2 Yes figure 1 A-A cross-sectional view of the ore body 6 in the lower middle section 1, on both sides of a certain section of the ore body 6, excavate the pedestrian climbing 2 and the cutting ascending hill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16
Inventor 杨志强张力智习玉良屈建伟
Owner LINGBAO CITY JINYUAN MINING
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