Empty-support cutting roadway type upward wide drift filling mining method

Abstract

The invention relates to an empty-support cutting roadway type upward wide drift filling mining method. A stope is arranged in the strike direction, the length is 60 m, the width of an orebody is thehorizontal thickness of the orebody, the height of the middle section is 45 m, the subsection height is 15 m, and no basal or middle pillars exist. The middle-section orebody is divided into the stopes in the strike direction of the orebody, the middle section is divided into a plurality of subsections in the vertical direction, and a footwall trackless extravein sampling mode is adopted; a stopeconnection roadway is constructed towards footwall of the orebody perpendicular to a middle section roadway or subsection roadways, and layered connection roadways are constructed along the footwall of the orebody after reaching the orebody; strip-shaped roads are arranged vertically in the stope; and the strip-shaped roads are subjected to two-step interval stoping. After filling is finished, empty-support cutting roadways with the width of 3 m and the height of 1 m are reserved along the full length regardless of the one-step mining or two-step mining of the strip-shaped roads. By adopting the mining method, the production capacity of one single stope is greatly improved, the mining operation cost is reduced, and the method has the outstanding advantages of simple process, safety and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of mining, and relates to an empty top cutting roadway filling mining method with an upward wide approach. This method is mainly applicable to the recovery of water-rich underground gold mining with broken surrounding rocks and inclined medium-thick ore bodies. The water-rich and broken surrounding rock means that after excavating the roadway in the rock mass, the water gushing in the working face reaches 40m 3 / h or more, and the type of surrounding rock is classified as Class IV and V rock mass with poor stability according to RQD. After the rock mass is exposed, due to the short self-stabilization time, it is very prone to collapse and caving. Background technique [0002] When mining a sloping medium-thick ore body with a horizontal thickness of 20m to 25m, due to the relatively thick horizontal thickness of the ore body, in the mining process, in order to ensure the safety of the roof, a security pilla...

AI Technical Summary

Problems solved by technology

[0002] When mining a sloping medium-thick ore body with a horizontal thickness of 20m to 25m, due to the relatively thick horizontal thickness of the ore body, in the mining process, in order to ensure the safety of the roof, a security pillar must be reserved, resulting in ore loss

If the general upward approach mining method is adopted, the production capacity of the approach mining is relatively low, which cannot meet the production needs

This contradiction has restricted the development of this mining field for a long time.

Especially in areas with poor engineering geological conditions, rich water and broken surrounding rocks, the construction speed of the excavation project is greatly reduced during the construction and section roadway, which affects the formation time of the production stope.

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