Atlas Copco’s rock drill worked together with TBM in the water-diversion project in Jilin Province
China Railway Engineering Equipment Group Co., Ltd. (shorted as CRE) is a a large state-owned enterprise specialized in the research, production and technical services of tunnel boring machines. In June 2014, the company procured four Atlas Copco COP 1838HD+ rock drills and related supporting equipment and successfully used them on the TBM manufactured for the Water Supply Project of the central cities of Jilin Province. The TBM is also China's first TBM with independent intellectual property.
According to He Fei, the Deputy Chief Engineer of CRE Design Institute, the project was faced with a large proportion of the sections having difficult geological conditions, a great demand for initial support, and high requirements for the design and configuration of TBM ancillary operation equipment. To adapt to the geological features, after comprehensive research, CRE procured four COP 1838HD+ rock drills and related supporting equipment from Atlas Copco and used these for rock support. Among the four rock drills, two were installed in the front of the TBM host, with the other two mounted in the rear of the TBM host.
Currently, this TBM only uses the two rock drills mounted on the front, which have been working three shifts a day, eight hours each shift. The bolt diameter is 22 to 25 mm, the hole diameter is 40 mm, and the hole depth is 3.7 m. The equipment drills an average of one hole every 3 minutes.
Speaking of the original intention of cooperation with Atlas Copco, Dong Lei, deputy general manager of the equipment procurement center of China Railway Corporation, said that in spite of lacking experience in procuring a rock drill for the TBM, they were deeply impressed by the COP 1838HD+ rock drill from Atlas Copco, which is characterized by its quality, safety, low failure rate and high drilling efficiency. In addition, Atlas Copco has had more than 30 years’ experience in providing TBM-supporting equipment internationally, serving such corporate clients as Robbins, Herrenknecht, and so on, and has a good market reputation. Their initial choice has been proved to have been absolutely correct.
In order to fully understand the customer’s needs, the Mining and Rock Excavation Services Department of Atlas Copco had been working with the equipment procurement center of China Railway Corporation for three months at the early stage of the project to discuss and adjust the structure, size, control means and certain functions of the TBM-supporting bolt rig, in order to lay a solid foundation for the smooth operation of the equipment.
Just as the saying goes, “Faith moves mountains,” with the joint efforts of the parties, the TBM of China Railway has left an indelible mark in the Jilin Province Songhua River Water Diversion Project with its excellent performance, and the first-ever application of Atlas Copco’s COP 1838HD+ rock drill in the domestic production of TBM has also opened a new chapter for it to tap the modern tunnel construction equipment market.
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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.
Mining and Rock Excavation Service is a division within Atlas Copco’s Mining and Rock Excavation Technique business area. It provides a complete range of services with the aim of maximizing customers’ productivity. The division focuses on spare parts supply, professional service, support solutions and training. It has distribution centers in China, Sweden and the United States, and is based in Örebro, Sweden.