New Application of Atlas Copco ROC L6 Drilling Rig Successfully Realized in a Marine Project
Taiwan Hung Hua Construction Co., Ltd. has been mainly engaged in water conservancy dredging and marine works construction since its establishment in 1981.
Shui Tou Dock of Kinmen is the largest marine rock cleaning works in the history of Taiwan, the dock will carry the important task of providing better service for tourists from the Mainland to Taiwan, the total volume of rock to be blasted is 240,000 cu.m, with total investment over 2 billion NTD. The project was officially started in 2000, however, due to complicated rock distribution in Kinmen area and heavy influence of tides, drilling at seabed was required before blasting for most rocks, but there is no specialized company for seabed rock blasting in Taiwan, therefore the work schedule was seriously lagged behind for a period. Taiwan Hung Hua Construction Co., Ltd., after taking over this project at the end of 2010, changed the work method to mechanical drilling on sea instead of the traditional human drilling at seabed, and put two units of Atlas Copco ROC L6 drilling rigs on the latest built “Hung Fu” supporting platform, to drill from the top of rock for blasting, therefore reducing the effect of tide and marine current on drilling operations in the sea, and successfully catching up the schedule while the work amount has substantially increased.
High efficiency in mechanical drilling
- Accurate positioning: with traditional manual drilling, accurate positioning at seabed is not possible, and the spacing between boreholes cannot be effectively controlled, with frequent cases that rock cannot be blast open, but marine drill can be steadily supported on a platform for operation, and can effectively control the borehole spacing and angles;
- Long time work is possible: with traditional manual drilling, work is done under water, so only 2~3 hours of work is allowed every day even if in good weather, but drilling operation with a marine drilling machine can be continuous almost 24h a day;
- No restriction on weather and seabed situation: in addition to bad weather that prevents work from under water, traditional manual drilling often has the problem that a hole cannot reach the preset depth, and is likely to be affected by deposit on rocks, often unable to reach the rock due to excessively thick deposit;
- Accurate control of drilling depth: the fixed height of the marine platform allows accurate control of borehole depth in conjunction with existing depth meter, therefore avoiding waste of dynamite;
High benefits from ROC L6 drilling rig
Talking about the result of using these two units of ROC L6 drilling rigs, Chen Chungpang, General Manager of Taiwan Hung Hua Construction Co., Ltd. was quite satisfied by commenting “the best feature of these two units of drilling rigs is high level of automation; computer control can be realized; they are in high quality and components are highly stable; the fuel consumption is low, and the two units of drilling rigs use only 850L every day. Moreover, they can be quickly moved and positioned, therefore quite flexible in the work.”
According to different rock composition and hardness, the drilling depth of ROC L6 drilling rig in the harbor basin dredging works for Shui Tou Dock of Kinmen is 0.5~12m, and the overall drilling efficiency is 20~25m/h; during the 16 months since their operation, total rock drilling and blasting of 190,000 cu.m had been completed, with output value of over 500 million NTD. This has laid a solid foundation for the innovated application of Atlas Copco ROC L6 drilling rig in marine projects!
- Coco Meng
Marketing Communication Specialist
Atlas Copco Mining and Rock Excavation Technique
Phone: +86 10 5870 6332
Atlas Copco’s Mining and Rock Excavation Technique business area provides equipment for drilling and rock excavation, a complete range of related consumables and service through a global network. The business area innovates for sustainable productivity in surface and underground mining, infrastructure, civil works, well drilling and geotechnical applications. Principal product development and manufacturing units are located in Sweden, the United States, Canada, China and India.
Atlas Copco Surface Drilling Equipment is a division within Atlas Copco’s Mining and Rock Excavation Technique business area. It develops, manufactures, and markets rock drilling equipment for various applications in civil engineering, quarries and open pit mines worldwide. The division focuses strongly on innovative product design and aftermarket support systems, which give added customer value. The divisional headquarters and main production center is in Örebro, Sweden.