Deformation of Roadway in Deep Buried Loose Extra Thick Coal Seam and Pressure Relieving Support Technology with Full Anchor Cable in Steps
In view of the problem that the deformation and failure of surrounding rock of deep buried loose and extra-thick coal seam is significant,and the traditional bolt support is difficult to control the deformation of surrounding rock,in order to improve the current situation of deep buried roadway support and improve the bearing capacity of surrounding rock,the deformation and failure characteristics and causes of surrounding rock are analyzed,and the full anchor cable ladder pressure relief support technology is proposed.The field practice shows that after the implementation of the support scheme,the deformation control effect of surrounding rock is significant,the development degree of surrounding rock fissures is general,the cumulative maximum of roof subsidence and two-sided convergence is 58 mm and 120 mm respectively,and the deformation of surrounding rock meets the normal use requirements.
deep burialloose extra-thick coal seammetamorphosisfull cable step compression support
NETL
NSTL
万方数据
