Respected sir! 1.first to develop the geometrical model, which consists of the block(poly) and joint sets. Then develop the tunnel modeling which consists of XY(center of the tunnel), r(radius of the tunnel ),n( number of the circumference of the circle).2.property of the material 3.property of the joint set material 4.History of the unbalance force 5.set gravity 6.fix blocks 7.solve 8.excavation of the tunnel 9.solve