A groundbreaking study led by MA Jieteng from the Gu-cheng Coal Mine of Shanxi Lu’an Mining Group is set to transform the approach to roadway stability in thick coal seams. Published in ‘Taiyuan Ligong Daxue xuebao’ (Journal of Taiyuan University of Technology), this research tackles a persistent challenge in mining: ensuring the stability of roadways after utilizing innovative concrete flexible mold filling technology.
The issue at hand revolves around the stability of roadways left along the goaf, which can be particularly precarious. To address this, the research combines flexible mold filling with shaped charge blasting pre-cracking technology. This dual approach not only enhances roadway integrity but also optimizes the mining process, potentially leading to significant cost savings.
MA Jieteng explains, “By employing theoretical analysis and numerical simulation, we have developed a deep hole pre-cracking blasting scheme tailored for specific site conditions. This method allows us to effectively manage the internal stress fields and improve the overall stability of the roadway.” The study reveals that as the cutting height increases, the support resistance of the filling body and the deformation of surrounding rock initially decrease before stabilizing. Conversely, increasing the cutting angle results in a continuous rise in support resistance and deformation, underscoring the delicate balance engineers must maintain.
The findings are promising: the deformation of surrounding rock is reduced by an impressive 56%, while displacement of the roof and floor diminishes by 72%. Such reductions not only enhance safety but also lower maintenance costs in the long run, making this research invaluable for the mining and construction sectors.
The implications of this study extend far beyond immediate engineering applications. As the industry faces mounting pressure to improve safety and efficiency, innovations like those presented by MA Jieteng could pave the way for more resilient mining practices. The combination of advanced technologies in roadway construction could redefine operational standards, leading to enhanced productivity and reduced environmental impact.
This pioneering research from the Gu-cheng Coal Mine is a testament to how targeted scientific inquiry can yield practical solutions, setting a new benchmark in the field of mining and construction. For more details on this innovative work, you can visit Gu-cheng Coal Mine of Shanxi Lu’an Mining Group.
