A method for recovering residual top columns with high-stage and large-span goafs both above and below

Abstract

The invention discloses a recycling method of a residual ejecting column with up and down high-stage and long-span goaf. High-stage and long-span goaf above the residual ejecting column is subjected to primary barren rock-milltailing gluing and secondary milltailing ungluing filling to construct an artificial false roof; high-stage and long-span goaf below the residual ejecting column is subjectedto primary barren rock-milltailing gluing and secondary milltailing ungluing filling to construct an operation platform, and a stoping space is left; the upward horizontal layered filling method is adopted to recycle the residual ejecting column from bottom to top layer by layer; when stoping is conducted at the last layer, the accessing filling method is adopted to conduct recycling every two goafs. According to the filling methods of high-stage and long-span goaf processing, safety of residual ejecting column stoping is guaranteed. The falling barren rock and concentrated milltailing in thegoaf are adopted, the ungluing filling is mainly adopted to conduct goaf processing, and the filling cost is reduced maximunlly. The upward horizontal layered filling method and the accessing fillingmethod are adopted, and therefore stoping efficiency is further improved, stope exposed area is controlled, and loss and dilution are reduced.

Description

technical field [0001] The invention belongs to the technical field of mineral mining, and in particular relates to a method for recovering residual top pillars in high-stage and large-span goafs above and below. Background technique [0002] Mineral resources are important natural resources and an important material basis for the development of social production. With the rapid development of social economy, the consumption of mineral resources is accelerating, resulting in the depletion of high-quality shallow resources that are easy to mine. In order to ensure sustainable development, a large number of mines have begun to pay attention to the secondary recovery of shallow high-grade residual ore resources. Especially when deep mining faces many technical difficulties that are difficult to overcome, mines will turn more to the secondary recovery of residual ore resources. mining. [0003] Before the filling method was popularized and applied on a large scale, the open-fi...

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Problems solved by technology

[0009] In order to solve the technical problems of high safety hazards, high cost, low efficiency, and serious loss and depletion in the recovery of residual top columns in high-stage and large-span goafs, the present invention provides a method that can safely and efficiently recover residual jack columns. The method of jacking pillars has the characteristics of good stope safety, high ore recovery rate and small dilution

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