(EnergyAsia, December 6 2010, Monday) — UK’s Xstrata Coal and Mitsubishi Development Pty Ltd (MDP), an Australian subsidiary of Japan’s Mitsubishi Corporation, have jointly approved the A$1.3 billion expansion of their Ulan coal mine joint venture in Australia. (US$1=A$1.02). MDP, which holds a 10% interest in the Ulan Coal Mines Limited, said the partners will…