Abstract：Bilateral cumulative tensile explosion，a new controll blasting technology of cumulative explosion，is put forward and defined，which aims at resolving the problems existing in conventional blasting，smooth blasting，present control blasting and the status of complex outline shaping blasting in rock masses with high uniaxial compressive strength. In application，the charge is put into a special set with cumulative effect in two designed directions，and then the charged set is put into the shot hole. After being detonated，even compressive stress and concentrated tensile stress from explosion are produced in non-controlled and controlled directions，respectively，and then the stresses act on corresponding wall of the shot hole. As a result，crannies are initiated and propagated and rock mass are fractured in controlled direction. The characteristics of new blasting technology，matching sets，explosion mechanism and mechanics models of explosion are detailedly introduced in the paper. On the basis of field experiments of explosion of single borehole and multi-boreholes， the technology is applied to blast rock window and bench in some special large caverns. The satisfactory blasting effects have been achieved. The application results show that the technology is practicable and effective to complex outline shaping blasting of rock mass with high uniaxial compressive strength. The technology shows a bright future of widespread applications.
