关键词:  , 端头支架；弧形三角块；支护阻力

Abstract:  The determination of face-end hydraulic support resistance is the key to support design and selection．Therefore，theoretical analyses were carried out in this paper to study the collapse of overburden，movenment rules of basic roof structure，and determination method of resonable supporting parameters in the face-end area．The results show that the basic roof can be the fractured or caving rock stratum in the face-end area．The sinking motion of the arc triangular pieces in the fractured zone is the same with the voussoir beam in the middle of the face，while the arc triangular pieces in the caving zone can be regarded as the cantilever beam which is only supported by coal wall and loaded by overburden pressure，or forms the similar voussoir beam structure hinged with the frontal and posterior arc triangular plates mutually．Different triangular plate structures of main roof result in different pressure behavior，that is，the pressure behavior of main roof is obvious in the voussoir beam structure，and the dynamic load coefficient is large，while the similar voussoir beam hinged by triangular plate structures results in less pressure behavior and smaller dynamic load coefficient．In the action relation between the support and surrounding rock in the face-end，the working conditions of support include three types：given deformation state，limited deformation state，and given loading state．Meanwhile，the reasonable supporting strength of face-end support under different conditons can be estimated by the corresponding voussoir beam，cantilever beam，and the similar voussoir beam hinged by triangular plate structures in the face-end area，respectively．

Key words:  , face-end hydraulic support；arc triangular plate；support resistance