mechanized stepped room and pillar mining method

Abstract

The invention discloses a mechanized benching room-and-pillar mining method. Internal-pulse slope ramp mining preparation is adopted in a stope, and the main mining and development engineering comprises a stope slope ramps, a pedestrian and ventilation raise and a cutting roadway; during stope mining, stopping is conducted between ribbons from top to bottom, working faces start from the intersections of the stope slope ramp and the ribbons and are propelled to the two sides along the strike, and the upper ribbon stoping working face is ahead of the lower ribbon stoping working face; the first-mining ribbon takes the cutting roadway as a free face and compensation space for rib expanding and coping; one pilot tunnel is arranged at the advanced stoping working face on the lower sides of the other ribbons, and then the pilot tunnel serves as a free face for rib expanding and coping on the corresponding ribbons; stope mining is conducted through operation of trackless equipment, and during ribbon stoping in the stope, a trigonal bench is reserved on the bottom of the lower side of each ribbon, and the trigonal benches serve as running channels and operation platforms of the trackless equipment; during ribbon stoping, the trigonal benches on the bottoms of the adjacent ribbons on the upper portion are recycled synchronously. The production capacity and efficiency are high, the mining and development engineering quantity is low, and the construction difficulty and the cost are low.

Description

technical field [0001] The invention belongs to the field of underground mine mining, in particular to a mechanized stepped room-and-pillar mining method for mining gently inclined thin to medium-thick ore bodies. Background technique [0002] For gently inclined thin to medium-thick ore bodies, the room-and-pillar method is usually used for mining at home and abroad. When the ore body inclination angle is less than or equal to 10°, trackless equipment such as rock drilling rigs and scrapers can directly enter the stope for operation, the mining operation efficiency is high, and the production capacity of the stope is large; Due to the limitation of its climbing ability, the equipment cannot enter the stope for operation. At this time, only the air leg rock drill can be used to drill rock, and the electric rake is used to extract the ore. The labor intensity of the workers is high, and the effective distance of the electric rake is small and the efficiency is low. The mecha...

AI Technical Summary

Problems solved by technology

When the ore body inclination angle is less than or equal to 10°, trackless equipment such as rock drilling rigs and scrapers can directly enter the stope for operation, the mining operation efficiency is high, and the production capacity of the stope is large; Due to the limitation of its climbing ability, the equipment cannot enter the stope for operation. At this time, only the air leg rock drill can be used to drill rock, and the electric rake is used to extract the ore. The labor intensity of the workers is high, and the effective distance of the electric rake is small and the efficiency is low. Low level of mechanization and small capacity in production operations

At the same time, the amount of mining and cutting in the stope is large, and the cost of mining and cutting is high. When the slope of the ore body is large

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