Stope bottom structure suitable for underground two-step mining and production process thereof

Abstract

The invention discloses a stope bottom structure suitable for underground two-step mining and a production process thereof. An underground stope is divided into a room stope and a pillar stope. Bottom pillars are reserved according to the bottom structure forms. Along-vein travelling roadways (4) and across-vein ore-drawing roadways (6) are utilized to handle the ores. The blasting ores (11) in the stope are blasted and fall in trenches (12). A scraper pours the ores into an ore pass (5) via a common ore-drawing drift (9) and a room ore-drawing drift (10). After tailing-cemented filling of the room of the stope, new pillar undercutting roadways (8) are driven in the bottom pillars (3) during mining the pillar stope. The trenches (12) for room mining are formed through drilling and blasting and undercutting. The goafs formed after mining and ore-drawing of pillars (2) are filled. The stope bottom structure can serve two stopes, reduce the quantities and support quantity, reduce the mining and development ratio of mining, improve the stability and save the mining cost and preparation time of two-step mining.

Description

technical field [0001] The invention relates to a stope bottom structure and a production process of an underground mine, in particular to a stope bottom structure suitable for underground two-step recovery and a production process thereof. It is suitable for all kinds of mines to use tailings filling for step-by-step back mining operation with trackless equipment, realize the sharing of the stope exit route, reduce the engineering quantity of the bottom structure and the mining preparation time of the two-step stope stope. Background technique [0002] The bottom structure of the ore block is an important component of the mining method, and the bottom structure of the stope has a great influence on the technical and economic effects of the mining method and the safety of the mining work. According to statistics, the labor consumption for forming the bottom structure of the mine underground stope accounts for 20-40% of the total labor consumption per ton of ore. Therefore, a...

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Problems solved by technology

[0004] These two bottom structures have a large amount of work, and the cutting ratio of the bottom pillar is large, which affects the stability of the bottom pillar and increases the amount of support work.

The two-step recovery has a high cutting-to-cutting ratio and takes a long time to prepare the stope, which affects the comprehensive production capacity of the stope

At present, there is no publicized bottom structure design method that can be used for two stopes in China. In December 2006, "Mining Technology" disclosed a method for optimizing the structure parameters of a stope. It adopts a flat bottom structure and serves for a single stope. field

This kind of bottom structure has a high mining ratio and cannot meet the requirements of thick and large ore bodies, distributed mining and large mining equipment.

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