They emphasize to daven with proper preparation and clean body. Krias Shma is not related to the brochos as the Rashaba, so you can say krias shma without the brochos before. Mincha is davened until 6 and a half hours from the beginning of the day 6 AM normally around 12:30 and they hold that in the half hour from chatzos to Mincha one can still daven shacharis.
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