FIELD: borehole engineering. SUBSTANCE: invention relates to developing solid fuels for use as working medium for borehole apparatuses (powder pressure generators, borehole pressure accumulators, and the like). According to invention, fuel is composed of sodium perchlorate (oxidant), butadiene-styrene thermoelasticoplastic (combustible), sulfur, tetramethylthiuram disulfide, zinc oxide or captax (curing reagents), and also hydrocarbon plasticizer, in particular transformer oil or industrial oil. EFFECT: increased heat resistance (up to 260 C), energy output, and specific volume of evolved gases, and reduced content of condensed phase in combustion products. 3 cl, 1 tbl
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