en.Wedoany.com Reported - China Railway Construction Heavy Industry Co., Ltd. (CRCHI) recently successfully deployed a medium-deep hole charging truck in an underground iron mine in China, solving the difficulties of charging caused by borehole distortion and collapse in soft powder ore formations. The equipment achieves a standard charging density of 6.5 kilograms per meter, with a charging efficiency of over 70 kilograms per minute. Charging a single row of boreholes takes only 25 minutes, with a charge weight of 600 kilograms, and a single-row blasting output exceeding 100 trucks, significantly improving mine blasting quality and operational efficiency.
Founded in 2007 and headquartered in Changsha City, Hunan Province, CRCHI is a core equipment manufacturing enterprise under China Railway Construction Corporation Limited, focusing on the research, development, and manufacturing of tunnel construction equipment, track systems, specialized equipment, and mining machinery. The company was listed on the Shanghai Stock Exchange in 2019 (stock code: 688425). The underground geological conditions of the iron mine targeted in this effort are complex, compounded by the traditional manual drilling method using simple equipment, leading to widespread issues of borehole distortion and collapse in medium-deep holes. Previously, the use of simple pneumatic chargers combined with manual tube feeding resulted in high labor intensity, difficult tube insertion, low efficiency, high safety risks, and poor control over charging accuracy, severely limiting mine production capacity.
To address this, CRCHI deployed a core technical team to collaborate with the mine operator on technical breakthroughs. The on-site team conducted in-depth underground surveys and developed comprehensive solutions based on site conditions, optimizing and upgrading the entire process from equipment, processes, maintenance, and hole formation. The team fully deployed CRCHI's self-developed medium-deep hole charging truck, optimizing the equipment's structure, power, and functional modules to address distorted and collapsed boreholes, fundamentally solving issues of tube jamming and blockage. Additionally, an innovative red-line initiation process was applied, combined with a new pipeline cleaning method, improving operational smoothness and equipment stability. One-on-one hands-on training was also provided on-site to ensure the implementation of the new equipment and processes.
The charging truck is fully adaptable to complex mine conditions, completely resolving high-risk safety issues such as uneven manual charging density and difficult tube insertion in complex environments, significantly improving blasting uniformity and overall effectiveness. Full mechanization reduces manual labor intensity and eliminates safety hazards. Through targeted efforts, all related technical challenges have been fully overcome, achieving comprehensive improvements in blasting quality, operational efficiency, and ore output. This breakthrough demonstrates CRCHI's capabilities in high-end equipment development, on-site service, and emergency response, providing technical support for safe, efficient, and green mine production.
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