In a groundbreaking study published in ‘Case Studies in Construction Materials’, Junhao Xu from the College of Water Conservancy and Civil Engineering at Shandong Agricultural University has introduced an innovative approach to reinforcing deep high-stress roadways. This research, which originates from the engineering challenges faced in the 1780 ventilation roadway of Shiyakou Coal Mine, presents a novel prestressed anchor-grouting reinforcement method utilizing a high-fluidity quick-setting micro-expansion (HFQSME) grouting material.
The HFQSME material, developed through a careful combination of superplasticizer, accelerator, and expansion agents, demonstrates remarkable properties that could significantly enhance the safety and stability of underground structures. Xu noted, “The optimal composition of our grouting material not only improves fluidity but also enhances setting time and expansion, which are critical for effective reinforcement in fractured rock masses.” The study found that the ideal formulation consists of 95% superfine Portland cement, 0.5% superplasticizer, 0.5% accelerator, 5.0% expansion agent, and a water-binder ratio of 0.4.
This innovative grouting material has shown impressive results in reinforcing rock masses with varying degrees of fragmentation. The peak strength of rock mass treated with HFQSME was found to be 166% and 233% higher than that reinforced with traditional superfine slurry. Such enhancements could translate into fewer structural failures and reduced maintenance costs for construction companies operating in high-stress environments.
The implications of this research extend beyond theoretical advancements. By improving the prestressed anchor grouting method, Xu’s team has effectively reduced deformation in the 1780 ventilation roadway, showcasing a practical application that could lead to more robust support designs across various construction projects. “Our findings indicate a significant reduction in deformation compared to previous support schemes, which is crucial for the long-term stability of deep mining operations,” Xu added.
As the construction industry continues to grapple with the challenges posed by deep high-stress environments, the adoption of HFQSME grouting material could herald a new era of reinforced infrastructure. Companies looking to enhance their safety protocols and reduce operational risks may find this research particularly compelling.
This study not only contributes to the academic discourse but also holds commercial promise, suggesting that the construction sector could see a shift towards more effective and efficient reinforcement methods. For further details on this innovative research, you can refer to the publication in ‘Case Studies in Construction Materials’, which translates to ‘Case Studies in Construction Materials’. More information about Junhao Xu’s work can be found at lead_author_affiliation.