The vast natural steppes in the lower reaches of the Tarim River are mainly distributed in the oasis-desert ecotone,a typical area with fragile ecology.

The layout of weakened zone and the effect of parameters relevant to weakened zone on roadway maintenance is also studied.

Analysis on influence of weak fractured zones on deformation and stability of a right dam-abutment by FLAC~(3D);

The dynam relaxed rockmass at Daliushu in Heishanxia Gorge on the Yellow River contains a great quantity of weak intercalations, which control the dynam relaxed rockmass physical and mechanical properties to a great extent.

Study on evaluation of deformation modulus of no clay weak interbed;

Through analysing the correlation between physical property of no_clay weak interbed obtained by in_situ test and its existed geostress,and combining the confining pressure simulating test results of disturbed weak interbed sample,we show that the controlling effect of confining pressure to physical property of no_clay weak interbed is very evident,as the same of clay weak interbed.