Arrangement method for initial mining sublevel stoping drift with sublevel caving method

Abstract

It relates to a method of drift slicing sublevel stopping without bottom post with reduced working load, expenses, construction cycle, and improved exploration ratio and return rate. It decides the stage height, section height, in path distance through the conditions and forms of the reserve, production scale of the ore, two times of sublevel height.

Description

technical field [0001] The invention relates to an underground mining technology, in particular to a layout method for the first-mining and segmented mining approach of the pillarless segmental caving method, which is suitable for the traditional segmental segmental caving method without pillars and the new technology of large-space pillarless mining. Background technique [0002] Pillarless segmented caving method is a mining method with simple structure, high safety and high efficiency, and convenient management. It is widely used in underground mines in metallurgy, nonferrous metals, and chemical industries in my country. For a long time, the mining design of pillarless mines in my country has been mainly based on the relevant technical regulations of the domestic mining industry, the occurrence conditions of the ore body, and the level and progress of mining technology at home and abroad, and the stage height, segment height, progress Road spacing and layout. In order to...

AI Technical Summary

Problems solved by technology

The traditional design method is: according to the occurrence conditions and shape of the ore body and the production scale of the mine, determine the stage height, segment height and approach distance. Segment height = 1.0~1.2 approach spacing. With the advancement of mining theory, that is, the application of large-space pillarless mining technology, the approach spacing = 1.0~1.5 segment height is currently used. On this basis, the first mining is completed. The mining design of the subsection and the second subsection and the roof treatment plan of the goaf, referring to Figure 1, below the ore boundary line 4 are the first mining subsection 5, the second subsection 6, the third subsection 7 and the fourth subsection Segment 8, referring to Figures 2 and 3, the mining approach 3 is set at the junction of the segments, and is set at intervals of 2 and 1, and the mining blast hole 1 is fan-shaped to control the range of the caving body, which is slightly larger than the ellipse when mining and discharging Emitting body 2, the subsection height of the first mining subsection is the same as that of other subsections, resulting in a large amount of capital construction and high construction costs of the mine. Poor economic benefit

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