DESENVOLVIMENTO DE UMA DESCIDA DE ÁGUA MODULAR POR MEIO DE MODELO FISICO REDUZIDO
Development of a modular stepped chute through reduced physical model
DOI:
https://doi.org/10.5016/geociencias.v40i03.15425Abstract
Stepped chutes have long been used in works of different sizes of urban infrastructure, road drainage, spillways, and mine drainage. Mine waste dumps are structures for the disposal of materials with no economic value, extracted to release ore exploration. These deposits are formed by the ascending method, with banks at every ten meters of unevenness, which can reach, in total, up to 300 m of stacking. Their drainage systems use stepped chutes built on slopes defined by geotechnical design (usually 1V: 2H), followed by horizontal levels (berms) from three to eight meters in length. There are several design solutions for these drainage structures: reinforced concrete, smooth or stepped rectangular section chutes; concrete filled geocell, smooth trapezoidal section chutes; gabion, smooth or stepped, rectangular or trapezoidal chutes; etc. This study proposes an equation to design criteria surface drainage structures applied to mine waste dumps geometry. The results indicated that it is possible to treat the hole system as if formed by a single stepped chute and stilling basin system, optimizing design effort, reducing associated risks with erosion, and creating beacons for economic execution.