Novel mining method of gently-inclined thin and medium thickness ore bodies

Abstract

The invention discloses a novel mining method of gently-inclined thin and medium thickness ore bodies. According to the method, ore bodies in one stope are stoped by dividing the stope into two stope areas through steps: firstly, stoping is performed at the stope area (1) by using a pillarless sublevel caving method: the ore bodies are directly caved in single sublevel by using medium-length blastholes; a certain empty area formed after ore removal is used as a free surface for stoping of the stope area (2); then, the stoping is performed at the stope area (2) by using a blasting force carrying mining method; fan-shaped medium-length blastholes are arranged in a manner perpendicular to the ore body tendency, and are filled with powder according to sections, the decking parts are the parts from the lower disc boundaries of the ore bodies to the hole bottoms; the empty area formed during the stoping of the stope area (1) is used as a free surface for blasting row by row; ores in the stope area (2) are thrown in the empty area by using the blasting force. The method integrates the pillarless sublevel caving method and the blast force carrying mining method, so that the supporting difficulty and the workload are reduced, the operation is safer, the mining cost is low, and the labor productivity is high.

Description

[0001] technical field

[0002] The invention belongs to the technical field of mining engineering, and in particular relates to a novel mining method suitable for mining gently inclined thin-medium-thick ore bodies. Background technique

[0003] Gently inclined thin-medium-thick ore bodies have brought many difficulties to mining due to their inherent conditions. For example, the ore cannot be released completely by its own weight, and problems such as large cutting ratio, low recovery rate, and high cost are prone to occur during the mining process. The mining methods for gently inclined ore bodies at home and abroad mainly include room and pillar method, comprehensive method, chassis funnel mining method, filling method and so on. The room-and-pillar method and the comprehensive method need to keep ore pillars in the stope, the ore recovery rate is low, and they are directly operated in the goaf, which has poor safety and requires roof support, which has complicated proce...

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