Continuous mining method of medium-thick heavy pitch ore body empty field

Abstract

The invention discloses a continuous mining method of a medium-thick heavy pitch ore body empty field. The continuous mining method includes the following steps: dividing an extraction area and extraction units in the extraction area; determining the total extraction sequence of the extraction area; generally arranging the mining preparation project of the extraction area; cutting and strengthening the mining extraction units; constructing a temporary pillar recovery safe mining environment; recovering temporary pillars step by step. The continuous mining method of the medium-thick heavy pitch ore body empty field can achieve safe, efficient and low-cost mining of the ore body and adopts sectional step-by-step mining; chambers in the extraction area with sectional empty fields are extracted, then pillars in the extraction area are extracted on the basis of building the safe mining environment, so continuous mining in the area is achieved, and the continuous mining method can be applied to the non-consolidated filled mines with allowable surface subsidence, especially is applicable to medium-thick heavy pitch ore body resource extension mining, and can achieve continuous mining.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to an open-field continuous mining method for medium-thick and steeply inclined ore bodies. Background technique [0002] The traditional open-field mining method divides the ore block into the mine room and the ore pillar, one step returns to the mining room, and the second step recovers the ore pillar. However, due to the impact of economic benefits and safety, many mines only pay attention to one step back to the mining room, lagging behind or even ignoring In this mining method, due to the limitation of the stability of the mine house, the reserved ore pillars occupy a large amount of resources, and affected by the mining process, its shape becomes irregular, which leads to The recovery process is complicated and the recovery rate is low. At the same time, various safety issues such as empty area treatment and ground pressure management are not considered comprehensiv...

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Problems solved by technology

[0002] The traditional open-field mining method divides the ore block into the mine room and the ore pillar, one step returns to the mining room, and the second step recovers the ore pillar. However, due to the impact of economic benefits and safety, many mines only pay attention to one step back to the mining room, lagging behind or even ignoring In this mining method, due to the limitation of the stability of the mine house, the reserved ore pillars occupy a large amount of resources, and affected by the mining process, its shape becomes irregular, which leads to The recovery process is complicated and the recovery rate is low; at the same time, various safety issues such as empty area treatment and ground pressure management are not considered comprehensively in the second-step mining, which leads to difficulties in production connection, and the up-and-down mining cannot be carried out in an orderly manner, which seriously restricts the development of the mine

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