| China’s reserves of coalbed methane is very large,but the development and utilization of coalbed methane resources is faced with many technical difficulties,in order to solve these problems,the key is to reinforce the study of rock mechanics.This paper study the influence of tensile strength of low rank coal cause by the anisotropy through Brazilian test and the influence of mechanical properties of low rank coal cause by the confining pressure and moisture content through Triaxial compression experiment,find the rang of formation pressure through AE test.Researches show: Bedding plane have significant influence on tensile failure of low rank coal.Change the angle between bedding plane and stress direction,the tensile strength will change.The confining pressure have significant influence on the failure of low rank coal.When the confining pressure rise,the compressive strength,elasticity modulus,Poisson’s ratio of low rank coal rise too.The water will softening the low rank coal,when the moisture content rise,the compressive strength,elasticity modulus will reduce. |
