Abstract: One of important components for a successful control and support of weak rockmasses is to have advance knowledge of engineering geological conditions and structure of surrounding rock. Therefore, lack of knowledge of engineering geological conditions and structure of surrounding rock, which leads no supported objects well defined, eventually results in failures in support of weak rockmasses. In this paper, the authors use seismic exploration technology to fully detect structures of surrounding rock in the main shaft of Xiandewang coal mine, which provides information and parameters needed for design of tunnel support.