transmission system Multi-Ram Forging Hot Extrusion Forming Technology and Die Design for Large 15CrMn Steel Gears in Hydraulic Rock Drills In view of the requirements for high strength and high precision large gears of high-power transmission system of hydraulic rock drills, this paper studies a multi-ram forging hot extrusion forming technology for large 15CrMn steel gears, and designs corresponding dies. Based on the thermoplastic
railway tunnel Research and Practice on the Three⁃bench Construction Method Using Dual⁃boom Drilling Jumbo in Tunnels with Weak Surrounding Rock To address the issues of low construction efficiency and high safety risks associated with traditional microbench method in weak surrounding rock tunnels， a three-bench construction method using a dual-boom drilling jumbo was studied based on the Ganjia tunnel of Xining-Chengdu railway（ rock
tunnel engineering Integrated Tunnel Excavation and Support Construction Technology Taking the Xinfangdoushan Tunnel on the Yichang-Fuling High-Speed Railway as the engineering background, a comprehensive investigation was performed on the integrated construction technology of tunnel excavation and support. Meanwhile, a comparative analysis was conducted on the operational
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tunnel engineering Three-Arm Rock Drilling Jumbo Straight Eye Slot Blasting Construction Technology Tunnel construction can be easily affected by complex terrain, and in such cases, drilling and blasting become the main technical methods. This article explores the straight-eye slotting technique related to three-arm rock drilling jumbos, mainly involving equipment performance and blasting
railway tunnel Research on Equipment Selection for Mechanized Construction of Railway Tunnels Taking a railway tunnel project as an example, this paper analyzes the equipment selection for tunnel boring operation line from the aspects of rock drilling equipment and slag discharge equipment, explores the equipment selection for support operation line around the links such as primary support
single-track long railway tunnel Adaptability Analysis of Mechanized Supporting Construction of Single-Track Long Railway Tunnel The geological conditions of the single-track long railway tunnel are complex and the construction is difficult. How to speed up the construction efficiency and effectively to ensure the construction quality and safety is one of the challenges in tunnel construction. Based on the mechanized
weak surrounding rock Research on the Application of Intelligent Blasting Excavation Technology for Large-Section Soft Rock Tunnels To address the low efficiency and high risks of the traditional soft rock step excavation method, a large-section soft rock tunnel intelligent blasting excavation technology was developed and applied based on the Baokang Tunnel of the Zhengwan High-Speed Railway project. The technical principles
rock drilling jumbo Overview of the Rock Drilling Rig's Drilling Mechanism, Principles, and Analysis of Premature Wear Rock drilling jumbos play an important role in tunnel construction. As the main component of a rock drilling jumbo, the performance of the drilling rig determines the overall effectiveness of the jumbo. In practical use, premature wear of drilling rigs often occurs. By studying the structure and
High-speed railway Analysis of Improvements and Benefits in Full-Section Mechanized Construction of High-Speed Rail Tunnels in Weak Surrounding Rock Using the Yubai Tunnel on the Hamu high-speed railway as a case study, this paper looks at full-section tunnel construction in weak surrounding rock. By optimizing drilling and blasting techniques, applying guided fracture controlled blasting, improving shotcrete quality, and reasonably adjusting
highway tunnel Exploration of the Mechanized Design and Construction for All Processes of Highway Tunnels Two-lane and three-lane highway tunnels，this paper analyzes the differences between highway tunnels and railway tunnels from multiple perspectives． Combining the successful experience of fullprocess mechanized design and construction of railway tunnels and the characteristics of two-lane and three
