Don't know if space is available but maintenance slot of this train has been freed up. Already TATA CDO is congested. There were proposals of new trains. If that doesn't materialize, we can expect TATA ERS frequency change if rakes are available. And also, SER is getting LHB coaches but sent to other zones.
No idea about the Adityapur pit line. I am also unable to get much updates as I am not in Jamshedpur