I don't think this SPACE has anything to do with the universe. Those quotes have to do with the Earth and the Earth's sky, not the universe.
In several translations, they don't use the word SPACE. What's your source for these translation that you've used?
With 84:1, the translations Pickthall and Shakir used the word HEAVEN, while Yusuf Ali and Sahih International used SKY. So the HEAVEN referred to the SKY, not to the UNIVERSE. Here for 84:1:
With verse 69:16, only one translation (Yusuf Ali) used the word SKY, but I also think the use of the word HEAVEN also referred to the SKY, and not to the UNIVERSE:
Do not confuse sky and the universe as being one and the same. SKY is what we can only see on EARTH, from our perspective at ground level, and what we see is only a very tiny fraction of the universe.
Beside I don't buy your interpretation of these verses you've quoted, as being the Big Rip. Do you want to know why?
Because I've seen those same quotes being used before, by other Muslim members here @ RF. They have used them (those same quotes) to define the Big Bang, not the Big Rip. The Big Bang and Big Rip are not the same things.
Who is right? You? Or them?
Personally, I think you all wrong with interpretations.
Anyway, those quotes only mean separating the sky (or heaven) from Earth, or the creation of the sky or firmament. Hardly original concept, and certainly not scientific by any mean.
In the Bible (meaning Genesis 1:6-8), separate the "waters from above" (sky) from the "water below" (sea).
Older than the Bible's account, are the Babylonian versions, found in the Enuma Elish, where the god Ea (Sumerian Enki) separate the sky from the Earth.
Older still, is the Sumerian poem of
Gilgames (Gilgamesh or Bilagames)
and the Netherworld. In the prologue to the poem, there is brief description to the creation.
And then there is the Egyptian cosmology or creation myth, where the god Shu separate his daughter Nut (sky or heaven) from his son Geb (Earth), by holding Nut up, while Geb is in the reclining position:
The Islamic separating of the earth from the sky is not original concept, and it had nothing to do with the universe, no matter how you read those verses.
According to the Big Bang cosmology, the Earth was around when the expansion began, and the Earth would be long gone should the Big Rip occurred.
The Earth has only existed in the last 4.6 billion years, but the initial expansion (Big Bang) occurred over 13 billion years ago. Even our Sun didn't exist in the early stage of the universe.
And the Earth won't be around for the Big Rip, Big Crunch or Big Freeze, because the Earth would be swallowed up by the Sun, when the Sun turned into red giant star.