Numerical Simulation Analysis of Rock Bolt Stress in Deep Coal Roadway
XIAO Tongqiang
LI Huaizhen
Abstract： Based on the geological condition of a deep coal roadway,study was carried out on the relation between the rock bolt stress with its position and fixing angle by using the numerical simulation method,and the distribution law of rock bolt stress in the deep coal roadway was revealed. The shoulder bolt was featured by its larger axial force;the greater the tectonic stress,the greater the axial force of the shoulder bolt, as a result, the shoulder bolt was broken most easily. The fixing angle has great influence on the axial force of the shoulder bolt,the greater the fixing angle,the greater the maximum axial force. Based on the stress distribution characteristic of the shoulder bolt,the control technique for surrounding rock in shoulder area was proposed. At the beginning of the roadway excavation,the fixing angle of the shoulder bolt should be as small as possible in order to avoid the bolt body to pass through the bedding face between coal seam and roof;after the slippage of coal seam along roof,it is necessary to fix the shoulder bolts with a bigger dip angle so as to fasten the coal seam and roof together and strengthen the control of the shoulder surrounding rock.
Keywords：deep coal roadwayaxial force of rock boltshoulder boltnumerical simulation
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 23-26 )