Brief Analysis of Floor Grouting Method in Soft Rock Roadway Based on Engineering Materials and Engineering Mechanics

Abstract:

Floor grouting in soft rock roadway is one of the effective ways in floor heave control, and this method is being promoted quietly and quickly, but the applying effect is far from satisfied, the reasons are that: the depth of floor grouting is not enough and the influence of water hiding in floor hasnt been attached great importance. This paper analyzed the characteristics of floor broken rock zone in soft rock roadway and pointed out the importance of floor grouting in soft rock roadway, then proposed a practical method of floor grouting. The analysis conclusions show that: the depth of floor broken rock zone that can reach more than 4m is much greater than that of roof broken rock zone due to the double influences of surrounding rock stress and water; the important role of floor grouting in soft rock roadway is draining off free water from broken rock zone in order to strengthen roadway floor; floor grouting includes three important steps: plugging water channels, pumping out free water and grouting in deep holes. The article has revealed common blind spots of floor grouting methods existing, the method this article has noted can solve floor heave of soft rock roadway well, and it has very good application prospects. Key words: soft rock roadway, floor grouting, broken rock zone, free water in floor

• Periodical: Applied Mechanics and Materials (Volume 345)
• Pages: 442-446
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.345.442
• Online since: August 2013
• Authors: Peng Wei Hao, Hai Long Dong, Zhao Hui Liu, Jing Pei Li, Lai Wang Jing
• Keywords: Broken Rock Zone, Floor Grouting, Free Water in Floor, Soft Rock Roadway

References

[1] Jianbiao Bo, Wenfeng Li, Xiangyu Wang, Xu Ying, Lingjun Huo. Mechanism of Floor Heave and Control Technology of Roadway Induced by Mining, Journal of Mining &Safety Engineering, 2011, 28(1): 1-5.

[2] Zhen Wu, Guoping Li, Zhou Xian. Analysis of Floor Heave Mechanism under Dynamic Pressure and Countermeasures. Coal Mining Technology, 2011, 16(6): 60-62.

[3] Hongli Wang, Yubai Wang, Guanying Hu. Causes and Prevention Measures of Floor Heave in Roadway. Coal Mine Safety, 2005, 36(8): 43-45.

[4] Yuanlin Liu, Yuming Qin, Jinglin Yang. Governance Practices of Floor Heave in Deep soft Rock Roadway. Mine Construction Technology, 2009, 30(1): 11-13.

[5] Jialong Wu. Elasticity. Higher Education Press, (2001).