Experimental Study On Bedding Structure Effect Of Soft Rock

A set of sampling system was developed which can make standard undisturbed samples in thefield directly. A series of rock mechanics experiments are conducted under conditions of staticload, cyclic dynamic load, different loading rate, and different temperature etc. respectively for6bedding angles of undisturbed mudstone and coal samples which were made by using thesampling system from Shajihai coal mine. Bedding structure effect of mechanical properties anddeformation characteristics of mudstone and coal was studied comprehensively under static loadand cyclic dynamic load, and the variation regularity of the mechanics and deformationparameters with bedding angle was revealed. The changes of the mechanical properties after cyclicunloading disturbance and change regularity of kinetic parameters such as hysteresis curve,dynamic elastic modulus, and dynamic poisson’s ratio were analyzed. Finally, the loading rateeffect and temperature effect of mudstone and coal were studied under static load and cyclicdynamic load, and variation regularity of the mechanics and deformation parameters with loadingrate, temperature and bedding angle was revealed.