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Research on bolt support system for full seam gateway in high stressed thick seam

JIA An-li, HUANG Xu (School of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China)  
The paper analyzed the deformation failure features of the roof and ribs in full seam gateway and the bolt support mechanism under the high horizontal stresses. After the deformation failure under the roof horizontal stress, due to the self weight and the overburden above, the expended swelling force of the seam caused coal broken and falling. The two ribs of the gateway were failed due to the shearing. The paper provided the principle of the support design, the support method and the method for the parameters decided. After the site test and application, good results were obtained.
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