education background 	  	- 		1994 phd. china university of mining and technology, china
 	- 		1992 m.s. china university of mining and technology, china
 	- 		1989 b.s. china university of mining and technology, china
  	  	  	research interests 	  	- 		city subway tunnel and underground engineering
 	- 		discontinuous rock mechanics
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