The text of Psalm 6 of the Thanksgiving Hymns from Qumran 1QH

The word 'raqia' refers to the surface of the earth in line 31. 
Psalm 6. Column 3:19-36
[19] I thank Thee, O Lord, for Thou hast released my soul from the
  grave, 
and from the abyss of Sheol [20] Thou hast raised me up to an eternal height,
so that I can wander in the plain without limit,
and so that I know that there is hope for him whom [21] Thou hast formed out of the dust unto an eternal fellowship.
And the perverted spirit Thou has cleansed from the great transgression,
to stand in the assembly [22] with the host of the saints,
and to come into communion with the congregation of the sons of heaven.
And for man Thou hast cast an eternal lot with the spirits [23] of insight,
to praise Thy name in the choir [of rejoicings],
and to proclaim Thy wonders before all Thy creatures.

[24] But I am a creature of clay; what am I?
Kneaded with water; and for whom am I to be counted, and what is my strength?
[25] For I stand within the border of ungodliness, [25] and with the vicious by lot,
and the soul of the poor dwelleth with the great tumults,
and the evils of the tribulation with my steps, [26] when the snares of the pit open,
and all the nets of ungodliness and the drag of the vicious are spread out on the water,
when all the arrows of the pit fly out without cease and shatter without hope,
when the measuring line falleth upon judgment and the lot of wrath [28] upon the forsaken ones,
and the outpouring of fury upon the dissemblers and the moment of anger upon all corruption,
and the snares of death surround without escape.

[29] Then the floods of Belial go over all the steep banks,
like a fire that devoureth all their ...(?),
in order to destroy every green [30] and dry tree by their channels,
and it sweepeth with burning flames, until all that drink of them are no more;
[31] it devoureth the foundations of clay and the extension (raqia) of
the dry land,
and the foundations of the mountains become a burning,
and the roots of flint become streams of pitch.

And it devoureth right down to the great deep,
[32] and the floods of Belial break through the abyss,
and the planners of the deep roar with the noise of them that stir the mud.

And the earth [33] crieth out, because of the destruction which is executed in the world,
and all its planners scream,
and all who are upon it become mad,
[34] and they are dissolved at the great destruction.

For God thundereth with the roar of His strength,
and His holy abode resoundeth to the truth [35] of His glory,
and the host of heaven raiseth its voice,
and the eternal foundations are dissolved and tremble,
and the war of the heroes [36] of heaven sweepeth across the world,
and it turneth not back until the consummation and that determined for eternity, and there is nothing like unto it.

Reference

Holm-Nielsen, Svend. 1960. Hodayot: Psalms from Qumram. Acta Theologica Danica. Vol 2. Universitetsforlaget I Aarhus. pp. 64-65.