Broken ore body recoverable support shield upward double-layer access filling mining method

Abstract

The invention provides a broken ore body recoverable support shield upward double-layer access filling mining method. Heading and stoping start from the lower portions of layers along the trend of anore body, and a shield support is erected along with propelling of a stope face; and after stoping to the boundary of a stope, an up-hole is dug in the gap in the top of the shield support upwards, the shield support below the hole is dismounted and recovered after powder charging, then the upper layer is stoped in a lateral ore caving retreating manner, and after the two layers are stoped, cemented filling is carried out. By means of the operation, upward single access stoping filling is changed into upward double-layer access stoping filling, on one hand, the filling maintenance time is shortened, and the overall recovery efficiency of the stope is improved; and on the other hand, the detachable shield support is adopted, so that it is guaranteed that upward double-layer access stoping filling is smoothly carried out. Only the bottom layer of every two layers is supported, the supporting working time is shortened, the support can be recovered in a retreating manner, and the supporting cost is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a mining method for filling an upward double-layered approach under the cover of a broken ore body with recoverable supports. Background technique [0002] When mining weak, broken and poorly stable ore bodies, the down-filling mining method is generally adopted. In order to ensure the safety of filling and mining in the downward approach, the mine usually adopts dense wooden support for each approach, and a high-strength filling body is required on the top. However, under the condition of dense support of wooden frames, the working space of mechanized equipment will be small, and the heat dissipation and ventilation of pit logs will be difficult to rot. In addition, the dense support of two gangs of pit logs on the approach will reduce the cementation effect of the filling body, and the bottom mining operation space will be affected by the top filling. The body press...

AI Technical Summary

Problems solved by technology

This method greatly speeds up the efficiency of stope operations, but this method is mainly suitable for thick and large ore bodies, and due to the severe fracture of ore bodies, this method will cause potential safety hazards

[0004] Therefore, it is urgent to provide a mining method for broken ore bodies to solve the problems of high support and filling costs, difficult construction techniques, and insufficient space for mechanized equipment.

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