Mechanized mining method through downward or upward cemented filling for steeply-inclined orebody with extremely-crushed ore rock

Abstract

The invention provides a mechanized mining method through downward or upward cemented filling for a steeply-inclined orebody with extremely-crushed ore rock. The mechanized mining method comprises thesteps that layering drift stoping from top to bottom or from bottom to top is conducted; after a layering contact channel is tunneled, a machine enters the orebody along the layering contact channel,a cantilever tunneling machine is applied to replace ore breaking by blasting, as for each layer of a thin orebody is subjected to ore breaking in the advancing direction, or a large and thick orebody is subjected to ore breaking along a drift in the vertical direction at intervals or in sequence, the drift is arranged in a full-height mode, and ore removal through a forklift is conducted; and after the whole layer is subjected to single-step or two-step advancing stoping and back filling, the next layer is stoped, downward stoping is conducted on the lower portion of a top plate of a fillingbody, or upward stoping is conducted on a bottom plate of the filling body, and thus integrated innovation of a downward (upward) cemented filling mining method and ore breaking through a roadheaderis achieved. According to the method, damage to surrounding rock is reduced through mechanical ore breaking; in addition, a single-body hydraulic prop, a pi-shaped beam and a paved plastic mesh guarda top and a slope during mining, prop pulling is conducted during filling, the effects of high efficiency, safety, low ore loss and dilution rate, flexible stope arrangement are achieved, and exploration and mining combination is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a downward or upward cemented filling mechanized mining method for steeply inclined ore bodies with extremely broken ore rocks. grade ore body. Background technique [0002] In the Qianhe Gold Mine in Songxian County, Luoyang, the f coefficient of the ore body and the surrounding rock near the mine within 5-8m away from the ore body is less than 4, and the ore rock is extremely broken. When the upward cemented filling mining method is used for mining, the roof and the two sides are very easy to collapse, which not only causes loss and dilution, but also endangers mining safety. The advanced support ensures that the roof ore does not collapse, and the support cannot be recovered during the filling process. The mining cost is as high as 300 yuan / t, and the daily mining volume of the stope (access) is less than 20t. Change to the downward cemented filling mining method,...

AI Technical Summary

Problems solved by technology

When the upward cemented filling mining method is used for mining, the roof and the two sides are very easy to collapse, which not only causes loss and dilution, but also endangers mining safety. The advanced support ensures that the roof ore does not collapse, and the support cannot be recovered during the filling process. The mining cost is as high as 300 yuan / t, and the daily mining volume of the stope (access) is less than 20t

Change to the downward cemented filling mining method, mining under the cemented artificial roof. Although the ore fall from the roof is controllable, it is still necessary to densely arrange the wooden brackets next to the brackets to prevent the side walls from collapsing. During the filling process, the wooden brackets are also It cannot be recycled, and the mining cost is as high as about 300 yuan / t, and the daily mining volume of the stope (access) is less than 20t

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