Medium-length-hole room-and-pillar method of synchronically forming barrier pillars

Abstract

The invention belongs to the technical field of mining methods and particularly relates to a medium-length-hole room-and-pillar method of synchronically forming barrier pillars. In the method, an ore body is divided into a plurality of panels by each 100 m, wherein continuous pillars being 5 m in width are reserved between the panels; in the panels, a plurality of ore blocks are arranged by each 20 m, height of the ore blocks being 25-35 m; in each ore block, ore room span is 15 m, width of the barrier pillar is 5 m, size of the barrier pillar is 5*6 - 5*8 m, top pillar is 3 m in thickness and vertical height of a bottom structure is 8-12 m. In the invention, two rock drilling slope heading structures are drilled along the two sides of the ore room, so that the boundary of the ore room is controllable and barrier pillars are convenient to stope. Meanwhile, a goaf has a regular form so that stoping rate of ore is increased. All of the stoping is carried out with the medium-length holes, and medium-length-hole drilling is completed all before the ore break down of the ore blocks, thereby reducing stoping period of the ore blocks; the method achieves the synchronic stoping of the ore in the ore room and the ore in the barrier pillars; along with the advance of the working face, the barrier pillars are formed gradually.

Description

technical field [0001] The invention belongs to the technical field of mining methods, and in particular relates to a medium-deep hole room-and-pillar method for synchronously forming spaced ore pillars. Background technique [0002] The mining of gently inclined medium-thick ore bodies with a dip angle of 15°-35° and a thickness of 6-20m has always been a difficult problem at home and abroad. The inclination angle of the ore body is slow, and the ore cannot slide by itself, so it needs to be transported mechanically or manually. However, the open roof of the stope is high, and the roof management is difficult. According to the statistics of domestic gently inclined medium-thick orebody mines. The room-and-pillar mining method accounts for 50%; while foreign ore bodies of this type mainly use the room-and-pillar method, and its proportion reaches 61%. Therefore, the continuous application of new techniques, new materials, new technologies and new equipment in practice, and...

AI Technical Summary

Problems solved by technology

The inclination angle of the ore body is slow, and the ore cannot slide by itself, so it needs to be transported by machinery or manually. However, the empty roof of the stope is high, and the roof management is difficult

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