A New Method of Exploiting Overburden Minerals in Side Side of Open Pit Mine

Abstract

The invention provides a new method for mining an open-pit mine sidewall mineral below construction. The new method comprises: dividing each ore layer of the open-pit mine sidewall mineral below construction into a plurality of linear mining caverns along the inclination or trend of an ore body according to set width and height, and numbering in sequence; using mining equipment to first mine odd or even mining caverns, reserving odd or even mining caverns between even or odd mining caverns as ore pillars, performing mining-filling parallel operation on even or odd mining caverns, and filling the mined mining caverns in sequence after satisfying a filling space; when fillings in two adjacent mining caverns are solidified, then mining a mining cavern between the two adjacent mining caverns,and also performing mining-filling parallel operation on mining caverns to be mined later until multi-segment mining and filling of the various layers and thick ore bodies are completed. The mining method provided by the invention improves the strength of supporting a sidewall, reduces the risk of sidewall collapsing and landslide, has a high mineral recovery rate, and reduces pollution to environments such as atmosphere and soil.

Description

technical field [0001] The invention relates to a new method for exploiting side-side compacted minerals in an open-pit mine, which belongs to the technical field of mineral mining, and more specifically relates to a method for mining side-side compacted minerals in an open-pit mine by using mechanized mining equipment. Background technique [0002] like Figure 1-Figure 3 Shown, during open-pit mining, in the advancing direction of pit 5 ( figure 1 The direction shown by the middle arrow) forms a non-working side 13, forms an end side 12 on both sides of the advancing direction of the mining pit 5 in the normal advancing process, and forms a final side 11 in front of the advancing direction of the mining pit 5; the process of open-pit mining The above-mentioned non-working side 13, end side 12 and final side 11 formed around the mining pit 5 are collectively referred to as the side side 1. [0003] At present, due to the existence of the above-mentioned side walls in the ...

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Problems solved by technology

[0008] A. This prior art adopts the method of drilling from the top of the side of the open-pit coal mine, and filling the excavated roadway with mortar through the drilling, and the construction of the drilling on the top of the side can easily cause landslides and collapses of the side slope of the open-pit coal mine; and through the drilling Filling the mined roadway from top to bottom, due to the influence of the slump angle of the filling body, the filling body forms a cone shape in the mined roadway, and the top connection rate and compaction rate of the filling body in the mined roadway cannot be guaranteed. When recovering the coal pillars between the filled roadways in the later stage, due to the fact that the filling bodies on both sides are not connected to the roof and the compaction rate is low, the span of the mined roadway gradually increases, which may easily cause the roof of the roadway on both sides to collapse, resulting in side rails overall landslide, collapse

[0009] B. This existing technology adopts the method of leaving 1-1.5m wide coal pillars between adjacent roadways to recover the final side pressure coal of open-pit coal mines, but the coal pillars cannot be recycled later, which affects the side pressure coal. resource recovery rate, and may cause the remaining coal pillars to ignite spontaneously and pollute the environment;

[0010] C. The existing technology is limited to the recovery of side pressure coal with a coal seam thickness greater than 2.0m, a coal seam spacing of not less than 5.0m, and a coal seam inclination angle less than 10°, and cannot be extended to other types of open-pit mines and open-pit coal mines that are not within the scope of this condition Mining and recovery, the scope of application is limited. When the thickness of the coal seam is greater than 6m or when the open-pit mine is a group of ore seams with a distance of less than 5.0m, the existing technology cannot realize mining. The mining method of the prior art has a limited scope of application and resource recovery. rate remains low;

[0011] D. The filler is mortar, which is costly, and is not conducive to the recycling of mining waste such as stripped gangue, and cannot achieve the coordinated development of resource development and ecological environment

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