| 摘要 |
The manufacture is carried out in a continuous manner while simultaneously loading the blast holes in a device with mixing capability where (a) a less sensitive or non-explosive water-based matrix containing a cross-linkable polymer, (b) a cross-linking agent for cross-linking the polymer contained in the matrix, (c) a gas-generating agent, optionally (d) a pH-regulating agent, (e) a gas/air bubble-stabilizing agent, and also optionally (f) an oxidizer in granular form and (g) a fuel substance, are mixed. The presence of the polymer distributed uniformly in the matrix together with the cross-linking agent results in a three-dimensional network formed by molecular polymer chains bound to one another in a short period of time after mixing. This polymer network has three essential functions: (a) fixing the gas bubbles formed, preventing their migration and therefore keeping the final low density constant, (b) providing the final explosive with enough mechanical strength preventing the product from collapsing due to the actual weight of the explosive column despite the significant volume of gas/air contained in the explosive, and (c) providing a physical barrier against external water making the explosive water-resistant enough so that the explosive can remain loaded in the blast hole for relatively long periods without producing red smoke during subsequent detonation. The process can be performed in trucks for loading explosives in blast holes having compartments for the different components of the mixture and one or several mixing devices allowing the manufacture of the final mixture which would be unloaded into the blast holes either by means of a pump or an auger. |
