In an era where sustainable practices are increasingly vital to the construction industry, new research from Shuaijun Chen and his team at the University of Science and Technology Beijing sheds light on the mechanical properties of horizontal stratified cemented tailings backfill (SCTB). Published in the journal ‘Case Studies in Construction Materials’, this study delves into the strength deterioration mechanisms of SCTB under uniaxial compression, a topic that could have significant implications for mining and construction practices.
SCTB is commonly utilized in underground mining operations to stabilize voids created by extraction processes. However, the performance of this material can be compromised due to the conditions it encounters underground. Chen’s research highlights how the interval time during which the backfill is allowed to set can dramatically influence its mechanical properties. “The initial width of the stratified surface is a key factor that affects the stiffness of the backfill,” Chen notes, emphasizing the importance of understanding these dynamics for effective strength design.
The study employs both experimental and numerical methods to investigate the macro-scale and micro-scale behaviors of SCTB. The findings reveal that while the bonding strength and friction coefficient of the stratified surfaces do not significantly impact the mechanical properties, the presence of monti-form bulges can diminish stiffness. This stiffness reduction is critical, as it leads to the formation of microcracks under axial stress, ultimately threatening the integrity and strength of the backfill.
For the construction sector, these insights are particularly valuable. As companies strive to enhance safety and efficiency in mining operations, understanding the factors that affect backfill performance can lead to better material design and application strategies. “By optimizing the filling interval time and understanding the mechanics at play, we can improve the durability and reliability of backfills,” Chen explains. This could result in not only safer mining operations but also reduced costs associated with material failures and repairs.
As the industry moves toward more sustainable practices, the ability to effectively utilize waste materials like tailings in construction becomes increasingly critical. This research not only contributes to the academic understanding of SCTB but also paves the way for practical applications that could revolutionize how construction materials are sourced and used.
For those interested in exploring this groundbreaking research further, the study can be found in ‘Case Studies in Construction Materials’, a journal dedicated to advancing knowledge in construction technology. Chen’s work, based at the School of Civil and Resource Engineering, University of Science and Technology Beijing, represents a significant step forward in understanding and improving the materials that underpin the construction and mining industries.
