OPEN MINING METHOD FOR MINERAL DEPOSITS Russian patent published in 2014 - IPC E21C41/26 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to mining, more precisely to open mining of high deposits with use of continuous operation technique. The method includes cutting of a permanent trench, construction of a working trench, installation of transportation lines, bench cutting of mineral resources by continuous extraction and haulage system with a fan-shaped area of operations. When operations are performed in the fan-shaped manner a solid bed located outside the fan-shaped border is developed simultaneously; mineral deposits are shipped to transportation lines and at first the area of a V-shaped cut is determined at the fan-shaped area of operations in compliance with the following condition: $$S_{i(\text{sector})}=\frac{\pi \cdot L_{wa}^2\cdot {\alpha }_i}{360},$$ where L_wa - length of working area, m; α_i - angle of working area turn, degree; then the area of the V-shaped cut is determined with consideration of the solid bed in compliance with the following condition: $$S_i=\frac{L_{wa}^2\cdot tg({\displaystyle \sum _{i=1}^n{\alpha }_i})}{2},$$ where L_wa - length of working area, m; α_i - angle of working area turn, degree; and for the purpose of simultaneous performance of the fan-shaped working area and the V-shaped cut in the solid bed its volume is determined in compliance with the following condition: $$V_s=H\cdot (S_i-S_{i-1}-S_{i(\sec \text{}tor)}),$$ where H is an average thickness of mineral deposit, m; S_i is the area of the V-shaped cut with consideration of the solid bed, m²; S_i(sector) is the area of the V-shaped cut, m².

EFFECT: reducing labour intensity, increasing efficiency, sound extraction of mineral resources and safety of mining operations.

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