Abstract：In order to solve the problems of large gas emission and gas volume fraction easily exceeding the limit in the upper corner in Shoushan No. 1 coal mine, the optimal location of highly-located gas drainage roadway ( HGDR) of panel 12070 was studied. Mining-induced fractures of overlying strata and gas distribution in the gob were analyzed by CDEM and FLUENT. The designed method for optimizing the location of HGDR was put forward based on O-type theory and numerical simulation results. The horizontal and vertical distances between HGDR and the air-return gateway should be 16 ~ 20 m and 25 ~ 30 m, respectively in Shoushan coal mine.Filed investigation results showed that gas volume fraction was controlled effectively by the means that daily gas density in the upper corner was 0. 03% ~ 0. 26% and the daily peak value was 0. 47%.

Keyword：highly-located gas drainage roadway;gas flow;overlying strata fractures;gob porosity;gas drainage;gas volume fraction;