A Downward Approach Filling Mining Method

Abstract

The invention discloses a mining method for filling downward approach, which includes ore block division, mining arrangement, stope mining and stope filling. Solidification filling materials and low-strength quick-setting filling materials are alternately filled in the goafs of adjacent ore blocks in each layered approach, thereby reducing filling costs while ensuring mining safety, shortening mining time, and improving mining efficiency. Through the above method, the present invention not only enables the upper filling body to be jointly supported by the lower high-strength filling body and the lower-strength filling body, prevents the upper filling body from collapsing, and ensures mining safety; While reducing the amount of cement used and reducing the filling cost, the strength of the filling body is improved, and the time spent waiting for the filling material to reach strength is shortened, so as to improve the mining efficiency. At the same time, the performance of the filling body can be adjusted according to the use requirements, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of mine mining, in particular to a mining method for filling a downward approach. Background technique [0002] Filling mining method is a mining method that uses filling materials to fill goafs during the mining process. It can use filling materials for support, prevent surrounding rock collapse and surface subsidence, protect the ground and surface environment, and maximize the recovery of mineral resources. , and thus has been widely used. According to the different mining direction and filling method of the ore body, the filling mining method can be divided into the upward approach filling method, the downward approach filling method, and the subsequent filling mining method. Among them, the downward approach filling method builds an artificial false roof, so that under the protection of the artificial roof, the ore body is mined layer by layer from top to bottom, and the filling material is filled into...

AI Technical Summary

Problems solved by technology

However, because this method significantly reduces the filling ratio, no protective device is added, and the positions of the empty field bars in each interval filling layer are the same, resulting in only 50% of the filling material in the vertical direction corresponding to the empty field area, which lacks sufficient support strength, it is easy to cause collapse, and there are potential safety hazards

At the same time, during the filling process of this method, it is necessary to wait for the filling body of the first block to reach the design strength before mining the second block. The overall process takes a long time and the mining efficiency is low.

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