Downward subsection filling method

Abstract

The invention relates to a downward subsection filling method, which aims at high-stage large-scale stoping of a medium stable ore body underground a metal mine, and comprises the following steps of: A, dividing a stage stope into a plurality of subsections in the vertical direction, properly adjusting the heights of the subsections according to the stability condition of surrounding rock, and ensuring that the height of each subsection is greater than 15m; b, filling the stope goaf with a filling body to limit the displacement of the top plate and the lateral wall; c, exploded caved ore in the stope is used as stock ore, and the ore is discharged under the protection of the upper filling body; d, isolating the upper filling body from the lower loose ore by using a flexible isolating layer positioned on the upper surface of the fornix ore pile; e, filling roadways are arranged in the middle columns on the upper portions of the chambers and communicate with the adjacent chambers on the two sides; f, filling retaining walls are arranged at the filling roadway openings in the bottoms of the filling subsections so as to prevent the filling slurry in the stope from leaking, and the method has the advantages that the method can adapt to high-stage large-scale mining of medium-stable ore bodies, the stability of the stope is effectively controlled, the production capacity of the stope can be improved, and dilution and loss of ore can be reduced.

Description

technical field [0001] The invention relates to the technical field of underground mining and filling mining in metal mines, in particular to a downward segmented filling method. Background technique [0002] With the proposal and practice of the concept of "green mine", the environmental and safety problems caused by extensive mining are being gradually solved. As an important means and supporting technology for the construction of national green mines and non-waste mines, the filling mining method is gradually becoming the main trend of underground mining. The filling technology has gone through the stages of dry filling, water-sand filling, graded tailings filling, full tailings cement filling, high-concentration filling and paste filling, and has been greatly improved in technology. [0003] In the application of mine filling, according to different mining requirements, there are upward horizontal layered filling, downward horizontal layered filling, and access type fil...

AI Technical Summary

Problems solved by technology

The above filling methods can only start filling when the ore in the stope is completely cleared. Among them, the filling method of mining while filling has a small one-time filling volume and a large number of filling cycles. , the stability of the surrounding rock is high and the height of the stage is also subject to relatively large restrictions.

[0004] Nowadays, the scale of the stope is gradually developing towards the high stage and large size, and higher requirements are put forward for the filling technology: (1) For deposits with good ore rock stability, a relatively large empty field can be formed at one time. After that, the subsequent one-time filling is carried out, but the height of the stage is still limited; (2) For deposits with moderate ore rock stability, in actual mining, it is impossible to completely discharge the ore in the stope and maintain a large-scale empty field Stability, so it is necessary to adopt the method of segmented filling

The existing filling technology can only start filling after a section of ore is completely recovered and emptied, and it is still impossible to start filling when there are a large number of ore deposits, that is, filling on the upper part of the loose ore pile, which greatly Limits further improvements in mining efficiency and mine productivity

[0005] After searching by the inventors of this project, no downward segmental filling method that can not only exploit large-scale mining and control the stability of the stope, but also improve production capacity and reduce the dilution and loss of ore has not been detected.

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