Indonesian-focused coal miner Churchill Mining has confirmed it has received three approaches over deals, including one full takeover suggestion, but has denied any of these involve mining giant BHP Billiton.Churchill, which put out the statement after a surge in its share price recently, said it had received three separate and unconnected non-binding approaches, all of which are at various stages. Two of these approaches relate to the possible acquisition of specific projects within Churchill, and the third relates to a possible offer for the company as a whole. Discussions are ongoing with all three parties it said, but added, "The company would also like to clarify that there is no basis to the speculation in the press linking the company to BHP Billiton".