Room-and-pillar mining method for artificial barren rock pillars of gently inclined ore body

Abstract

The invention discloses a room-and-pillar mining method for artificial barren rock pillars of a gently inclined ore body. The method comprises the following steps: dividing the ore body into panels along the trend, dividing the ore body into strips by upwide incising in the panels, and conducting mining in two steps, constructing the artificial barren rock pillars according to a designed interval along with the advancing of a working surface during the mining of the first-step strips, and then stoping the adjacent second-step strips; and constructing the artificial barren rock pillars along with advancing of the stoping working face during second-step strip stoping, locating the artificial barren rock pillars constructed during second-step strip stoping strip stoping at the triangular vertexes of the two artificial barren rock pillars of the adjacent strips, and after strip stoping in the panels is finished, distributing the artificial barren rock pillars in the panels in a rhombus shape. The method has the advantages of safe operation and low depletion loss, and can consume and treat part of the excavated waste rocks, reduce the discharge of the waste rocks and reduce the comprehensive cost.

Description

Technical field [0001] The present invention belongs to the field of mine mining, and in particular, the present invention relates to a mineral column mining method for post-tilt mineral artificial waste stone. Background technique [0002] my country's non-metallic mineral ore is high, the main ore body of the mine is a slow mineral, and the main method of mining this mineral is a house column method, collapse method and strip mining after filming mining method. The lowest loss and the depletion rate is the strip to open the mine mining method, but most mining is limited to filling system is not complete, and the filling material is not sufficient to use a housing column mine mining. In order to control the ground pressure and ensure the safety of mining operations and ensure the safety of mining operations, it will lead to a large loss of ore, so the ore column is constructed in the original environment of the original environment. Resources is very important. The existing arti...

AI Technical Summary

Problems solved by technology

The existing artificial pillars are mainly made of bricks or waste rocks. The construction method is complex, difficult to apply, low in strength, high in comprehensive cost, and difficult to connect to the top.

At the same time, leaving a large number of ore pillars leads to low ore recovery rate and serious loss of mosaic, which seriously restricts the safe production capacity and economic benefits of the mine

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