Room-and-pillar mining method for mining gentle dip thin ore body

Abstract

The invention discloses a room-and-pillar mining method for mining gentle dip thin ore body. The method comprises the following steps: (1) distributing ore block stope along the direction of the ore body, reserving a bottom pillar, a top pillar and a room pillar on the ore bock, thus forming an ore room, forming return air inlets in the two ends of the top pillar, reserving an ore room inlet in the middle of the bottom pillar, reserving a partition ore column vertical to the direction of the core body in the middle of the ore room, and dividing the ore room into two small ore rooms by the partition ore column; (2) constructing upward incise and gateway incise at the periphery of each small ore room, and forming a rectangular ore block in the middle of each ore room, classifying the rectangular ore blocks of the small ore rooms into narrow and wide long-strip-shaped ore columns with different specifications, wherein the long shaft of each strip-shaped ore column is along the direction of the ore body, and excavating a concentrated ore filling position above the inlet of the ore room, namely a bottom plate in the middle, close to the bottom column, of the ore room; (3) recovering the rectangular ore blocks in the small ore rooms; and (4) drilling and blasting, loading ores, and conveying ores. According to the room-and-pillar mining method, the mechanical continuous high-efficiency mining can be implemented in the gentle dip thin ore body, the method can be suitable for the stability of various top plates, and the smooth operation of equipment in the ore room can be ensured.

Description

technical field [0001] The invention relates to a mining method, in particular to a room-and-pillar mining method for mining a gently inclined thin ore body. Background technique [0002] At present, when mining gently inclined thin ore bodies in underground mines, the mining methods are limited by the inclination angle and thickness of the ore bodies. It is generally difficult to carry out large-scale mechanized continuous mining operations. The mining process is complicated, the efficiency is low, and the consumption of production materials is large; However, when the stability of the ore body roof in different regions in the same mining area is quite different, it is generally necessary to design different mining methods for sub-area mining, which is technically difficult and complicated to handle; although the point-pillar mining method can adjust the size of the point pillar and However, the arrangement of a large number of point columns hinders the operation of various...

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Problems solved by technology

[0002] At present, when mining gently inclined thin ore bodies in underground mines, the mining methods are limited by the inclination angle and thickness of the ore bodies. It is generally difficult to carry out large-scale mechanized continuous mining operations. The mining process is complicated, the efficiency is low, and the consumption of production materials is large; However, when the stability of the ore body roof in different regions in the same mining area is quite different, it is generally necessary to design different mining methods for sub-area mining, which is technically difficult and complicated to handle; although the point-pillar mining method can adjust the size of the point pillar and However, the arrangement of a large number of point columns hinders the operation of various equipment in the mine room, which affects the mining work efficiency

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