15
2026-04
Design of Large-Diameter Drilling
Abstract：This paper focuses on the design of large-diameter drilling, elaborating on the design principles and demonstration cases of drilling structure and sequence, as well as key contents including well site layout, wellhead protection, foundation treatment and equipment installation.
2026-04-15
26
2026-03
Development Status of Large-Diameter Drilling at Home and Abroad
Abstract: Large-diameter drilling (also known as shaft sinking by drilling method) originated in Western Europe. After technological iterations in various countries, it has been widely applied and relevant equipment developed in the United States, the Soviet Union, Germany and other countries. China conducted trials in 1958 and drilled its first mine shaft in 1969, gradually achieving independent development and expanding its applications to national defense, high-rise buildings, sewage treatment and other fields.
2026-03-26
10
2026-03
This paper focuses on customized demands for overseas markets, introducing four core products: TBM Cutters, Raise Boring Machine (RBM) Roller Cutters, Reverse Circulation Drilling (RCD) Roller Cutters, and Wear & Heat-Resistant Materials. It briefly describes their specifications, advantages, application scenarios and quality standards. The products are compatible with mainstream overseas equipment models, covering various industries and geological conditions. Adopting advanced manufacturing processes, all products are certified under ISO9001 and can be supported with relevant international certifications.OEM/ODM customization is available. Supported by an annual production capacity of 30,000 sets of cutters and over 10,000 tons of wear & heat-resistant materials, together with multilingual technical support and full-cycle after-sales service, the products fully meet the supporting requirements of complex overseas engineering projects.
2026-03-10
24
2026-02
3 Minutes to Understand the Wisdom of China's Shield Machines in Metro Construction
This article adopts the "3-Minute Read" perspective to introduce the core role of China's shield tunneling machine as a "mobile smart factory" in metro tunnel construction. It analyzes the principle of achieving "one-pass tunnel completion" through five precise steps, highlighting its significance as an embodiment of the transition from "Made in China" to "Intelligently Made in China" and the applied value of Chinese engineering wisdom.
2026-02-24
06
2026-02
06
2026-02
China's "Deep-sea Space Station" Completes Debut
On February 6, the "Deep-sea Space Station" completed its first application at the Jintang Undersea Tunnel. The 75-meter high-pressure operation broke through the traditional depth limit, marking a new breakthrough in China’s deep-buried tunnel construction technology and filling the domestic gap in relevant fields.
2026-02-06
12
2026-01
On January 10, 2026, the Third 2025 Executive Vice Chairman Meeting of the International Association for Large-Diameter Engineering Shafts, Piles and Deep Foundations was successfully held in Ningbo. Mr. Chao Huanqing, Chairman of our company, Mr. Yang Jingrui, Chairman of our controlled subsidiary (Luoyang Jiujiu Wear-Resistant Material Manufacturing Co., Ltd.), and Mr. Jin Wenge, Vice General Manager of our company, attended the meeting as relevant members of the Association .
2026-01-12
03
2020-07
The "Zhenxing" tunnel boring machine used for the right line of the Yanlu Passage over-river project is a 15-meter-class, ultra-large-diameter slurry shield designed and manufactured by CCCC Tianhe specifically for Nanjing's cross-river tunnel. The tunnel’s shield-driven section spans a total length of 2,975 meters. This project features significant characteristics such as a large cross-section, high water pressure, extended distances, and exceptionally abrasive ground conditions. Moreover, most of the construction lies beneath the riverbed, with the hardest rock layers in the hard-rock sections exceeding 70 MPa in strength. The diverse and complex geological conditions place extremely stringent demands on the cutting tools used during excavation.
2020-07-03
21
2016-11
Luoyang Jiujiu Technology Co., Ltd. 20th Anniversary Celebration & Yuntai Mountain Resort Retreat
In August 2016, to celebrate the company’s 20th anniversary, a Yuntai Mountain resort getaway was held under the theme "Moving Forward Together, Creating Brilliant Futures." Yuntai Mountain, historically known as "Fufu Mountain," earned its second name due to its towering peaks and the perpetual clouds and mist that shroud the mountain throughout the year. The terrain is rugged and steep, with pristine forests blanketing the entire area. Towering over the landscape are deep, serene valleys dotted with crystal-clear streams and tranquil pools, complemented by countless breathtaking waterfalls and cascading springs. The scenery is nothing short of picturesque, featuring uniquely shaped rock formations that seem straight out of a dream.
2016-11-21
17
2015-09
Luoyang Jiujiu Technology Co., Ltd. Successfully Held the 2015 Baoduzhai Red Tourism Event
In August 2015, our company organized a two-day trip to Luanchuan Baoduzhai, themed "Remembering the Martyrs and Revisiting Our Red History." Baoduzhai boasts rugged, undulating terrain that stretches endlessly, with its steep and perilous landscape. Back then, PLA soldiers bravely carried explosive packs and scaling ladders, defying enemy fire to liberate this ancient fortress—once home to generations of impoverished villagers trapped in dire suffering. At the site, employees paid tribute at the Heroes' Monument, watched a documentary chronicling the liberation of Baoduzhai, and witnessed firsthand the inspiring scenes of heroic martyrs fearlessly battling through relentless challenges to safeguard their homeland and protect their cherished community.
2015-09-17
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