Abstract：In order to understand fully chang law of multiple dynamic tunel,failure characteristics and instability cause of surrounding rock were analyzed by field observation and borehole imaging in multiple dynamic tunnel of Wuhushan mine,the tunnel layout was optimized,the support scheme for surrounding rock was determined,and numerical simulation and field test were conducted. The results showed that shallow roof was broken obviously and subsidence in net. Two sides showed integrate deformation anti-archly. The causes of surrounding rock instability were the effect of multiple seams mined,weak roof,short self-stable course and wide loose range. After the upper seam being mined,vertical stress distribution from the upper to the lower was the variation from a saddle to a similar elongated “W”. The longer the distance to the upper seam was,and the smaller vertical stress in the point was. Reasonable location of 011208 haulage gateway was below 010908 working face gob,the distance was 16 m from outside 010908 ventilation gateway,and pillar width was 15 m. After couple controlling scheme of key support on broken roof( grouting-shed) and partition load on deep-shallow surrounding rock( bolt-cable) was used,the deformation of surrounding rock was less than 40 mm,and support effect was significant.

Keyword：multiple dynamic gateway;broken roof;deformation characteristics;optimal layout;support control;