The Union ministry of labour has put on hold Hindustan Copper Ltd's (HCL) plan to close down Surda, the last of its operational mines under the Mosabani group of mines around Ghatsila. The mine was to be closed down with effect from October 16. The ministry of labour has, through a letter dated October 11, conveyed that the Surda mines and its assisting units and departments including the Mosabani concentrate plant would not be closed, Mosabani Mines Labour Union (MMLU) general secretary Akhileshwar Singh stated.