A method for long-distance pipeline transportation of mortar to treat abandoned open-pit basins in mines

Abstract

The invention discloses a method for treating a mine abandoned open pit with mortar conveyed by a long-distance pipeline, and belongs to the technical field of mining engineering. The method aims to solve problems, existing when opencast operation is replaced with underground mining and non-bottom-column sublevel caving is adopted during underground mining, of mine open pit treating. The method comprises the following steps of scheduling the treatment of the open pit into two phases by taking a closed ring as a boundary, wherein the first-phase treatment project relates to the portion below the closed ring, and the second-phase project relates to the portion above the closed ring; the first-stage treatment project and underground mining production are carried out at the same time, and non-bottom-column sublevel caving must be adopted as the underground mining method to form a waste stone cushion layer with a certain thickness; a filling body, filled into the open pit, of the first-phase treatment project descends together with the waste stone cushion layer along with the descending of the altitude of mining activities, and it is ensured that upper filling and lower mining are carried out safely; and the second-phase treatment project is carried out above the open pit closed ring. By means of the method, the problem of disturbance on an unstable side slope of the open pit duringunderground mining is effectively solved, and the safe production of a mine is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and particularly relates to a method for treating abandoned open-air basins of mines by transporting mortar through long-distance pipelines. Background technique [0002] The open-pit basin formed by open-pit mining has a great impact on environmental damage. The open-pit basin formed by open-pit mining is easy to cause water environment pollution, damage to surface vegetation, geological disasters, and solid waste pollution. At the same time, with the passage of time and the influence of underground mining, the stability of the open-pit slope will have a huge impact on mine safety production. It will cause the property of the surrounding rock to deteriorate, and cause a major safety hazard to underground mining. [0003] At present, the technical measures adopted in the treatment of open-pit basins in China are mainly to construct artificial false bottom tailings cemented filling tre...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for long-distance pipeline transportation of mortar to treat abandoned open-pit basins in mines, so as to solve the problem of open-pit basins in mines that are converted from open-pit to underground mining and underground mining adopts the sub-section caving mining method without bottom pillars, and at the same time Solve the problem of the impact of the upper abandoned open-pit basin on underground mining

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