Discontinuous deformation analysis of deep large-section-soft-rock roadway support in Huxi mine

In order to solve the difficulty of deep large-section-soft-rock roadway support in Huxi Mine, and according to the surrounding rock properties and geological conditions, proposed 4 kinds of support programs. Using DDA numerical software, simulated deformation and cross-off of surrounding rock in different support conditions. The results show that the best support program is NO.2-the length of bolt is 2200mm, spacing of row and column in roof is 750mm×1000mm, spacing of row and column in two sides is 800mm×1000m, the length of cable is 4500mm, spacing of row and column is 1500mm×2000mm. The displacement of roof, bottom, left side and right side is relatively small as 20.0mm, 10.6 mm, 9.8 mm, 8.6 mm. Compared the results observed in the field with the results analyzed by DDA. Two results are nearly equal. Paper to some extent confirmed that DDA method is potential to play an important role in bolt roadway support.