Bolt-grouting combined support technology in deep soft rock roadway |
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| Affiliation: | 1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, China;2. Department of Mining Engineering & Metallurgical Engineering, Western Australian School of Mines, Curtin University, Kalgoorlie 6430, Australia;3. School of Mechanics and Civil Engineering, China University of Mining & Technology, Xuzhou 221116, China;1. School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China;2. Ministry of Education’s Key Lab of Coal Processing and High Efficient Clean Utilization, Xuzhou 221116, China;3. Advanced Analysis and Computation Center, China University of Mining & Technology, Xuzhou 221116, China;4. School of Resources and Geosciences, China University of Mining & Technology, Xuzhou 221116, China;1. School of Resources and Earth Science, China University of Mining & Technology, Xuzhou 221116, China;2. Key Laboratory of Coalbed Methane Resource & Reservoir Formation Process, China University of Mining & Technology, Xuzhou 221008, China |
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| Abstract: | Analyzing the mineral composition, mechanical properties and ground stress testing in surrounding rock,the study investigated the failure mechanism of deep soft rock roadway with high stress. The boltgrouting combined support system was proposed to prevent such failures. By means of FLAC3D numerical simulation and similar material simulation, the feasibility of the support design and the effectiveness of support parameters were discussed. According to the monitoring the surface and deep displacement in surrounding rock as well as bolt axial load, this paper analyzed the deformation of surrounding rock and the stress condition of the support structure. The monitor results were used to optimize the proposed support scheme. The results of field monitors demonstrate that the bolt-grouting combined support technology could improve the surround rock strength and bearing capacity of support structure, which controlled the great deformation failure and rheological property effectively in deep soft rock roadway with high stress. As a result, the long term stability and safety are guaranteed. |
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| Keywords: | Deep soft rock roadway Bolt-grouting support Numerical simulation Similar material simulation High stress |
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