Experimental Study on Deformation Law of Rectangular Roadway in Horizontal Layered Rock Mass

Figure 5

Evolution of vertical displacement field under different loads; (a) Under load level 4; (b) Under load level 14; and (c–e) Under load level 23 and cumulative duration is 541 mins, 542 mins, 543 mins and 544 mins, respectively. (unit: mm).

(a)

(b)

(c)

(d)

(e)

(f)