The Sandvik 2711 class narrow vein drills are designed to be safe, productive, mobile rigs for use in narrow vein and other confined areas. Sandvik stated that they are simple and safe to operate, with robust components, and provide an excellent performance to ownership cost ratio.
Selective mining methods and small tunnel developments have been shown to be a good way to extract ore economically, and control the dilution when ore is distributed in narrow veins typically less than 2-3m in width. Sandvik's narrow size underground drills are thus designed specifically with the requirements of drilling narrow vein drifts and that of small tunnels projects in mind. The drills are equipped with Sandvik's Fleet Data Monitoring systems, which can enable mines and tunnelling contractors to improve fleet performance and management.
Sandvik stated that the new 2711 drill family provides, in one modular platform, accurate drilling with high performance, large coverage and drill capacity, with enhanced product safety and excellent mobility, tramming smoothly into small mining drifts and tunnels. The selected reliable components and simple electro-hydraulic systems are designed to be used in conjunction with Sandvik's comprehensive range of underground drills, loaders and trucks, all being supported worldwide by the Sandvik network.
The company added that the new 2711 class is the ideal solution for specialist mines and drilling contractors looking for smarter control of ore dilution and increasing selective process in mining. The series consists of three drill types using a common platform covering different applications: namely development drilling DD2711, rock support bolting DS2711 and long hole production drilling DL2711 and DL2721.
The Sandvik DD2711 is a compact and flexible single boom electro-hydraulic jumbo for mining development and construction in small and medium size tunnels with a minimum cross section of 2.7m x 2.7m. The boom delivers large coverage and fully automatic parallelism for fast and accurate face drilling, while 20kW of drilling percussion power is provided through Sandvik's HXL5 rock drill. It is designed for underground hard rock applications that require high capacity and reliability in development blast holes ranging from 3.7m to 4.3m in length. The DD2711 is in effect a simple premium drill, compact, versatile and designed for global needs; it provides an excellent drilling performance to cost ratio in small drifts, improves safety and lowers operating costs.
The Sandvik DS2711 is a one person operated electro-hydraulic, fully mechanised bolter for rock reinforcement in underground hard rock mines. The operator works from supported ground while protected under a FOPS certified canopy structure. Mechanisation of the bolting process ensures efficient, constant and durable rock bolts integrity. The DS2711 provides an excellent bolting performance to cost ratio for small and medium size tunnels with minimum cross section of width 2.7m x height 3.0m. It also provides DS2711 provides high reach and can install all types of mechanised rock bolts ranging in length from 1.5m to 2.4m. It is, in effect, a small premium bolter, compact, mobile and designed for global needs.
The next addition to the range will happen in 2020, with Sandvik DL2711 and DL2721 long hole drills.