1. A safety two component explosive assembly adapted for down hole mixing and subsequent detonation, said assembly comprising: a. blasting package means having first and second containing means contiguous to one another, including separating means for said containing means, b. first and second separately non-explosive mix components in, respectively, said first and second containing means, c. an explosive mixing means positioned in said package means in a manner to explosively open said separating means upon activation of said explosive mixing means to cause mixing of the said two components into an explosive mixture, and d. a detonating means operable separately from said explosive mixing means and spaced sufficiently from said explosive mixing means so that activation of said explosive mixing means does not cause premature activation of said detonating means, said detonating means being so disposed in said assembly as to cause detonation of said explosive mixture upon activation thereof, whereby initial activation of said explosive mixing means causes formation of said explosive mixture, and subsequent independent activation of said detonating means causes said explosive mixture to detonate.

7. A method of in-hole mixing and detonation of an explosive composition, said method comprising: a. placing in a hole a blasting package means having first and second containing means contiguous to one another, containing, respectively, first and second independently non-explosive mix components, with separating means separating said components, b. also placing in proximity to said package means a first explosive mixing means and a second detonating means spaced from said explosive mixing means, c. activating said explosive mixing means to open said separating means and effect intermixing of said first and second components to form an explosive mixture, d. subsequent to the mixing of the two components to form an explosive mixture, activating the detonating means to cause detonation of said explosive mixture.

9. A method of mixing a two-component explosive in a relatively narrow passageway and detonating the same, said method comprising: a. inserting in said passageway an elongate actuating member having mounted thereto an explosive mixing detonating cord, b. mounting to said actuating member explosive package means having first and second containing means containing, respectively ''''to a position where said first and second containing means are contiguous to one another'''', first and second independently non-explosive components, c. moving said package means along said member into said passageway, d. actuating said detonating cord to cause mixing of said first and second components to form an explosive mixture, and e. subsequent to said mixing, detonating said explosive mixture.