In a new method of fighting large mine-roadway tires from a remote position, a mass of light foam is upwind side of the fire. The foam is formed by the ventilation (or local) from a foam agent (surface active agent) solution moves the foam to the fire, where the water contained in the foam cools and reduces the fire zone.
We reported partly in the studies of the foam plug method (high-expansion foam)
i) Agent.
ii) Mechanism of foam formation.
iii) Movement of foam.
iv) Quenching effect of foam.

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When steel structural members are heated under fire, change of expansion and curvature appears. On simply supported members of which ends are not restrained, these deformations appear apparently as they are to be. However, as the ends of structural members are generally fixed, these deformations are restrained and inner stress appears.
In this paper the behavior of this inner stress, that is, the influence of thermal stress to structure under fire, is discussed on simplified members.
It has been confirmed that the test result on the relation between the steel temperature and thermal stress nearly coincided with the result theoretically analyzed. Therefore, the thermal stress of end restrained steel members obliged to grow very large value, and it is scarcely possible to keep the structural members without any damage under fire.
Consequently, it may be given as a conclusion that we should make some local buckling artificially on beam members, and alleviate the thermal stress of column members.

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The Relative temperature rise in various concrete (ordinary concrete, light weight aggregates concrete, porous concrete) caused by fire heating was studied theoretically.
It is usually considered that the lower the specific gravity of concrete, the less the rise of inside temperature.
In this paper, it is concluded that the rise of inside temperature has a minimum value when the specific gravity has an adequate value, about 1.0.

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