Yes. It is possible to bring it back to Mooladhara through Shanthi meditation.
With the touch of a guru you can awaken the Kundalini to Ajna Chakra.
Can you Reverse your Kundalini once awakened?
Shanthi is mandatory for Kundalini Yogis.
Without Shanthi meditation, your Kundalini cannot be brought under your control. Once awakened, your life-force is always awakened. You can bring it to Ajna at your will at anytime.
Be Blessed by the Divine!
Prof. Krish Murali Eswar.