A Segmented Empty Field Method for Structures without Columns and Bottoms

Abstract

The invention discloses a segmented open-stope method without studding and bottom structures. The segmented open-stope method comprises the steps: ore blocks are divided along the strike of ore bodies, the ore blocks are divided into benches and segments, thick rock covering layers are formed at the top ends of the ore blocks before mining, then upward fan-shaped blast holes are constructed in segmented rock drilling roadways, and blasting is conducted through a millisecond short delay; after ore of each segment is broken down, one third of the ore is recovered firstly, the rest of the ore ismassively and uniformly removed at the last segment in a unified mode after all the segments are subjected to ore breaking-down, that is, before massive ore removal, the whole ore blocks are filled with the broken-down ore all the time, the former segment should be ahead of the next segment by the distance of 30 m or above to form bench mining, and after stoping of each segment is completed, segmented rock drilling roadway cross headings are blocked in time; and after stoping of all the segments is completed, ore removal roadways in the bottoms of the ore blocks are directly treated in a blocked mode. Ore pillars and the step of later ore pillar recovery are omitted, and the ore removal time of the ore is shortened.

Description

technical field [0001] The invention belongs to the technical field of underground mining methods, and in particular relates to a segmented open-field method with no intercolumn and no bottom structure, which has high grade ore, 1-2 ore bodies, thin and medium-thick ore bodies. Background technique [0002] The segmented open field method usually divides the ore body into multiple ore blocks, and each ore block is divided into a mine room and an ore pillar, and a bottom structure is set at the bottom of the ore block to meet the needs of electric raking. After mining in the mine house, it is almost difficult to recover the amount of ore in the inter-column and bottom structure, resulting in a large waste of resources. For some high-grade ore, the number of ore bodies is only 1~2, and the thickness of the ore body is thin or medium-thick. The intercolumn and the bottom structure are still set up, which causes the waste of high-grade ore, and the infrastructure of the bottom s...

AI Technical Summary

Problems solved by technology

After mining in the mine house, the amount of ore in the inter-column and bottom structure is almost difficult to recover, resulting in a large waste of resources

For some high-grade ore, the number of ore bodies is only 1~2, and the thickness of the ore body is thin or medium-thick. The intercolumn and the bottom structure are still set up, which causes the waste of high-grade ore, and the infrastructure of the bottom structure Engineering also takes up a lot of time cost, which has a huge impact on ore recovery and early capital investment

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