The phrase "new miners" refers to people who are new to the mining industry or profession. They are individuals who have recently started working in mines or extracting natural resources from the earth. Full definition
This algorithm is extremely efficient and drastically lowers the cost of entry for new miners, which could quickly bring this new coin into the mainstream. (bitcoinist.com)
The creator of ethereum is coming out against a proposal that would find the network altering its software to defend against powerful new miners. (coindesk.com)