Mining method for steep-dip thin ore body

Abstract

The invention relates to a mining method for a steep-drip thin ore body, which belongs to the technical field of mine underground mining. The mining method comprises the following steps: dividing theore body into ore blocks, and tunneling a vein-penetrating roadway in a direction perpendicular to the ore body from an outside-vein transportation roadway at the two ends of each ore block; tunnelinga pedestrian mine slide open yard at a vein of the vein-penetrating roadway, and simultaneously tunneling an in-vein scraper chamber and a sub-section drilling roadway; after tunneling of the sub-section drilling roadway is accomplished, tunneling a center advanced open yard; and recovering the ore blocks from top to bottom, and recovering the next sub section after the last sub section recoveryis ended by adopting a sub-section ore removal way for ore removal. The mining method has the advantage of sub-section ore removal, reduces operation time of each sub section at a working site, effectively controls mixing of surrounding rocks, reduces a rate of dilution, constructs a concrete cushion layer every 1-2 sub sections, can effectively control geopressure show at the working site, improves stability of the working site, reduces the rate of dilution of the ores, improves production efficiency of the working site, and guarantees safety of production operation.

Description

technical field [0001] The invention relates to the technical field of underground mine mining, in particular to a mining method suitable for steeply inclined thin ore bodies. Background technique [0002] Steeply inclined thin ore bodies generally refer to ore bodies with an inclination angle of not less than 50° and a thickness of not more than 4m. According to the experience of mining similar ore bodies at home and abroad, the main mining methods currently used are shallow hole retention method, wall cutting and filling method and segmented The open-field method, in which the shallow hole ore retention method is suitable for ore bodies with moderate stability and no cohesion, has problems such as high ore dilution rate, large loss rate, poor operation safety, and backlog of funds during the application process; wall-cutting and filling method It is suitable for ore bodies with a thickness of no more than 1.2m. In the application process, there are problems such as small p...

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Problems solved by technology

[0002] Steeply inclined thin ore bodies generally refer to ore bodies with an inclination angle of not less than 50° and a thickness of not more than 4m. According to the experience of mining similar ore bodies at home and abroad, the main mining methods currently used are shallow hole retention method, wall cutting and filling method and segmented The open-field method, in which the shallow hole ore retention method is suitable for ore bodies with moderate stability and no cohesion, has problems such as high ore dilution rate, large loss rate, poor operation safety, and backlog of funds during the application process; wall-cutting and filling method It is suitable for ore bodies with a thickness of no more than 1.2m. In the application process, there are problems such as small production capacity, high labor intensity, and complicated production processes; the segmented open field method currently used in mines is only applicable to those with a thickness of about 4m and stable surrounding rocks. Ore body, there are problems such as large loss rate, high dilution rate, and large ground pressure activity in the application process

[0003] However, with the gradual development of mine production at present, ground pressure activities are gradually appearing, and at the same time, the artificial labor force in mines is gradually lacking. When mining companies face complex ore bodies such as sharply inclined and broken thin veins, the existing mining methods become helpless.

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