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《Journal of Liaoning Technical University》 2005-03
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Bolt-grouting support technique controlling floor heave of extremely soft rock roadway

JIA Ming-kui1,2, ZHAO Xing-dong3, JIA An-li1 (1.College of Resource and Safety Engineering, China University of Mining and Technology, Beijing 100083,China; 2. Institute of Jiaozuo Coal Mine Group Corporation, Jiaozuo 454002, China; 3. Center for Rock Instability and Seismicity Research Northeastern University, Shenyang 110004, China)  
Based on the in-situ measurements of ground pressure and physical and mechanical properties of rocks, and analysis of minerals composition and fissures in rock, the type of soft rock was determined to investigate the deformation and failure of surrounding rocks and floor heave in extremely soft rock roadway in Guhanshan Coal Mine. Considering the field conditions of the surrounding rocks, an effective bolt-grouting support technique was designed to control the floor heave and the technique was also numerically validated using the Rock Failure Process Analysis code. The numerical results show that bolt-shotcrete-netting at first and then bolt-grouting technique can effectively strengthen the surrounding rocks and constrain floor heave in roadway. In addition, engineering application of bolt-grouting technique in Guhanshan Coal Mine also show that it is effective and practical.
【CateGory Index】: TD353.6
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