en.Wedoany.com Reported - Recently, the "Safety Facility Project Design for Underground Saw-Cut Mining of Garnet Mine" led by Sinosteel Shijiazhuang Design Institute, a subsidiary of Sinosteel International, successfully passed the expert review organized by the Hebei Provincial Department of Emergency Management, achieving the dual honors of "China's First" and "Hebei's First," setting a benchmark for the transformation and upgrading of the mining industry!
As one of only 80 garnet mines in China, this mine in Hebei Province is not only a high-hardness, high-value special non-metallic mine, but its complex occurrence conditions also pose extremely high challenges to mining design: the ore body is distributed in a stratoid form, with a dip direction of approximately 280°, a dip angle of 13° to 25°, and an average thickness of only 3.41m to 5.92m.
Facing this challenge, the project team of Sinosteel Shijiazhuang Design Institute broke away from the conventional thinking of traditional blasting mining and tailored a design plan for the country's first underground "saw-cut" mining special safety facility project. Adhering to the principles of "safety first, scientific rigor, and innovative breakthroughs," the team remained on the front line throughout the process, tackling core issues such as the layout of underground saw-cutting equipment, optimization of ventilation and transportation systems, roof protection, and emergency response. Balancing safety assurance with resource-efficient utilization, the team successfully developed a safety assurance model featuring "static saw-cutting + intelligent control + specialized dust/noise protection," forming a set of innovative and feasible design solutions that fill a gap in related fields in China.
This underground "saw-cut" mining process for non-metallic mines, characterized by static, non-blasting operations, regular and controllable cross-sections, and mechanized continuous operations, offers the following five core advantages:
01 Safe and Controllable, Risk Significantly Reduced
Avoids major risks associated with blasting, eliminating the need for high-hazard processes such as storage and transportation of civil explosives, blasting warnings, and misfire handling;
Static operations produce no vibration wave propagation, no vibration, resulting in more intact surrounding rock, with roof subsidence and sidewall convergence reduced by over 50%, support engineering volume decreased by 25% to 35%, and the incidence of roof falls and rib spalling reduced by over 80%; remote control enables human-machine separation, significantly reducing occupational injuries.
02 Resource Efficiency, Value Doubled
Precise layered and block cutting increases the block yield rate to 35% to 55%, 3 to 4 times that of traditional blasting; eliminates extensive secondary shaping and crushing and sorting processes, increasing high-value-added product output by over 50%, significantly improving resource utilization.
03 Minimal Damage, Preserved Integrity
No blasting vibration impact, avoiding hidden micro-cracks and through-cracks caused by traditional blasting, preserving the original structure of the ore body without damage, and maintaining its natural integrity.
04 Enhanced Efficiency, Increased Production Capacity
Standard blocks formed in one go, with single-block efficiency improved by 40% to 60%;
Staggered continuous operations across multiple working faces increase comprehensive production capacity by 15% to 25% compared to traditional blasting methods.
05 Green and Environmentally Friendly, Ecologically Sound
Wet spray process centrally handles dust, with no fugitive emissions; operational noise controlled at 65dB to 75dB, with no instantaneous strong noise impact; no harmful gases such as CO or NOx produced, improving underground air quality; no blasting seismic waves, avoiding surface cracking or slope loosening, balancing production and ecology.
The review process was strictly standardized, consisting of two phases: site survey and design review meeting. The expert team conducted comprehensive inquiries on design basis, technical parameters, safety measures, and emergency plans, ultimately highly recognizing the professionalism and innovation of the design plan and unanimously approving the review.
This technological breakthrough not only marks a new milestone for Sinosteel Shijiazhuang Design Institute in the field of innovative mining but also provides a vivid model for the green and safe transformation of China's entire mining industry. Moving forward, Sinosteel Shijiazhuang Design Institute will continue to refine design details, fully support project implementation, fulfill its responsibilities as a central enterprise, and contribute greater strength to the high-quality development of the mining industry by building a solid safety defense!
