| 摘要 |
Improved methods and apparatus are provided for pumping thickened slurry or liquid blasting agents through confining conduits for blasting geologic formations. Thickened slurry and liquid blasting agents are prepared containing gelling or thickening agents which produce thickened solutions having thixotropic properties. Increased shear is applied to the thickened blasting agents, e.g. they are kneaded, such as for example, in a pumper truck having means for mechanically disturbing the explosive, to temporarily produce a more flowable composition which is pumpable. The explosive is then immediately pumped into position, e.g. boreholes, wells. Upon standing under ambient conditions the blasting agent becomes more viscous thus providing the necessary properties of water resistance and settling stability.
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