Large-structure sublevel drilling stage ore removal mining method with delayed filling

Abstract

The invention relates to a large-structure sublevel drilling stage ore removal mining method with delayed filling. The mining method comprises stoping in stopes and bottom structure recovery which are carried out synchronously in a crossed manner, and comprises the following steps: step 1, stoping in odd-numbered stopes, wherein the stoping manner is sublevel drilling stage ore removal, and mined out space I is not filled immediately; step 2, stoping in 1 / 2 bottom structures I corresponding to the odd-numbered stopes, and filling ore rooms and the mined out space I, corresponding to the 1 / 2 bottom structures I, of the ore rooms after stoping is finished; step 3, stoping in even-numbered stopes, wherein mined out space II is not filled immediately; step 4, stoping in 1 / 2 bottom structures II corresponding to ore pillars, and filling the ore pillars and the mined out space II, corresponding to the 1 / 2 bottom structures II, of the ore pillars after stoping is finished. The mining method has the advantages that the mining-cutting work amount is reduced greatly; the production capacity of a single stope is high; the efficiency is high; workers' labor intensity is low; production, dispatching and management are simple. Moreover, stoping of the main ore in a stope and recovery of ore in the bottom structure of the stope are realized synchronously in a crossed manner, and the stoping operation is safe, so that the resource recovery rate is high.

Description

technical field [0001] The invention belongs to the field of underground mining, and in particular relates to a large-structure segmental rock-drilling stage mining method followed by filling mining for the mining of stable and steeply inclined thick ore bodies. Background technique [0002] For the mining of steeply inclined thick and large ore bodies with stable to extremely stable rocks, the mining method of segmental rock drilling and subsequent filling is a more suitable mining method. In this method, the ore body in the middle section is divided into sections, and the bottom level of the stage is equipped with a bottom ore discharge structure. In the segmental rock drilling roadway, rock drilling, blasting and ore dropping are carried out, and the collapsed ore is concentrated at the bottom ore discharge level for shoveling or transportation. The mined-out area shall be filled after the stope falling and mining are completed. [0003] At present, the stage height of t...

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Problems solved by technology

[0004] For large and extra-large underground mines, the above-mentioned structural parameters are used for production by the segmented rock drilling stage and then filling method. In order to meet the production capacity of the mine, it is often necessary to arrange multiple middle sections and multiple stopes for simultaneous production. Accurate cutting has a large amount of work and a tight construction period. The workload of production scheduling and operation arrangement in the stope is complicated. The consumption of personnel and equipment and work shifts is large, and the work efficiency is low.

In addition, if the bottom structure is not recovered, a considerable part of the ore resources will be wasted and lost; if the recovery is completed in the middle section or at the end of the service life, the original part of the project needs high maintenance costs, and is affected by the early mining and the special occurrence of bottom structure ores. Influenced by shape, the recovery environment deteriorates seriously in the later stage, and the layout and construction of new projects are difficult

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