-
Enterprise Profile
-
Product Introduction
-
-
30
2026
-
06
Do you know about the Sandvik DD422i drill rig? What are its differences compared with Epiroc drill rigs and domestic Chinese drill rigs?
The Sandvik DD422i is an intelligent twin-boom development drill rig designed for large-scale deep underground mines
1.The Sandvik DD422i is an intelligent twin-boom development drill rig designed for large-scale deep underground mines. It is fitted with SB60i telescopic booms that deliver a maximum coverage area of 60 m². The machine can complete blasting cut holes, contour holes and rock bolt support holes in a single pass. Equipped with TFX telescopic feed beams, it is highly maneuverable in crosscuts, turnouts and multi-level access drifts, integrating drifting and ground support operations to cut down the number of underground machines required. The rig is natively compatible with the AutoMine autonomous mining system, which uses laser SLAM for positioning without pre-installed reflective markers in roadways. It supports remote control, autonomous tramming, fully automated drilling and coordinated multi-machine scheduling across mine levels. In deep mining zones with high ground stress and high rockburst risks, it drastically reduces personnel exposure at working faces and improves underground safety. This model has been deployed in large copper mines including Khoemacau Copper Mine in Botswana and Chambishi Copper Mine in Zambia. Small-scale intelligent industrial trials have also been carried out at domestic Chinese mines such as Yinshan Mine of Jiangxi Copper and Pulang Copper Mine. It serves as a benchmark intelligent development rig for 10-million-tonne-class deep underground mines.
2.The DD422i is matched with the RD525 rock drill as its core drilling unit, with the following technical specifications: impact power 25 kW, impact frequency 93 Hz, working impact oil pressure range 100–235 bar and maximum oil pressure 235 bar. Standard drilling diameter for development ranges from 43 mm to 64 mm, while reaming diameter covers 76–127 mm. It accommodates shank adapters T35, T38, T45 and drill rods R39, H35. Adopting a modular structure with few high-pressure sealing connections, the drill features visual wear monitoring points and an intelligent adaptive anti-jamming algorithm. It dynamically adjusts impact energy and feed force based on real-time rock hardness readings, significantly reducing rod jamming in fractured rock and interbedded hard-soft formations and cutting consumption of drill rods and shank adapters. It delivers high hole accuracy to effectively control overbreak and underbreak, lowering explosive consumption. Long-term continuous operation at Khoemacau Copper Mine has proven that DD422i units equipped with RD525 rock drills deliver stable performance and extended maintenance intervals, suitable for year-round high-intensity mining.
3.Core comparison with the equivalent Epiroc Boomer M2C drill rig Although both are twin-boom development rigs, they differ distinctly in automation, operational capacity and integrated mine-wide compatibility. In terms of automation ecosystem, the DD422i relies on the full-range AutoMine autonomous platform that links loaders, production drills and haulage trucks to build a unified digital mining network. The Epiroc Boomer M2C only carries the standalone 6th Sense intelligence system, which merely supports automatic hole layout for the single rig. Autonomous tramming requires extra infrastructure such as reflective markers installed along roadways. For operational performance, the Boomer M2C achieves a maximum coverage area of only 45 m², requiring multiple repositioning cycles for large cross-sections. Rock bolt grouting is an optional add-on, meaning a separate dedicated bolter is usually required. In contrast, the DD422i integrates a built-in bolt grouting control module, handling both drifting and support to streamline the underground machine fleet. For power configuration, the Boomer M2C comes standard with the 1800HD+ rock drill. In terms of overall cost and application scenarios, Epiroc rigs carry a slightly lower upfront purchase price and suit small-to-medium shallow mines with narrow drifts and no plans for full-site autonomous mining. The DD422i is better suited to large deep mines with large-scale intelligent production planning.
4.Core differences from domestic Chinese twin-boom drill rigs Main domestic competitors include twin-boom rigs manufactured by Xintong and CRCC Heavy Industry. The gaps mainly lie in automation, overall reliability and integrated digital ecosystems. For automation, domestic rigs only support basic single-rig automatic hole drilling, lacking complete mine-wide autonomous dispatching platforms. Technologies for remote operation and coordinated multi-rig control remain under development. In operational performance, most domestic models have a maximum coverage area below 45 m². In reliability, the DD422i features fully factory-matched hydraulics, rock drills and controllers, with far longer mean time between failures. Domestic rigs mostly source core high-pressure components externally, resulting in poor system compatibility and higher failure rates under long-duration high-intensity operation in hot, humid overseas mining areas. Domestic rigs hold a clear cost advantage: their purchase price is substantially lower than the DD422i, supported by a mature local spare parts supply chain and reduced maintenance costs. They fit small-to-medium shallow domestic mines and tunnelling projects. While the DD422i demands higher initial capital outlay, it cuts long-term operational costs via autonomous manning reduction and combined drifting-support functionality, making it the preferred option for large deep mines.
5.Model selection guidance based on applicable conditions Equipment performance, technical parameters and cost differences define clear applicable scenarios. Domestic twin-boom rigs are the priority choice for small-to-medium domestic mines and tunnelling projects with tight budgets, shallow mining depth, narrow drifts and no full-site autonomous mining upgrade plans. The Epiroc Boomer M2C is an option for mines requiring only basic mechanized drifting with low demand for intelligent transformation. The Sandvik DD422i drill rig is most suitable for large deep mines with high in-situ stress formations, full-process autonomous mining layouts and high-efficiency integrated drifting and support for large cross-section roadways.
Previous article
RELATED INFORMATION
2024-02-10
Contact Us
Address: Lianhua Mountain, Yangjiazhangzi Economic and Technological Development Zone, Huludao City, Liaoning Province, China
Telephone:0086-429-4428053 0086-429-4428052
Tiktok
WeChat Public Number
Privacy Policy Powerby:300.cn Jinzhou SEO