** Shares of Australian coal miners help prop up the
domestic mining sub-index .AXMM
** China, top consumer of coal, hit back at the U.S. with
retaliatory tariffs, which includes a 15% levy on U.S. coal
** Coal duty is expected to increase the commodity's price
** Shares of Whitehaven Coal WHC.AX , Australia's largest
independent coal miner, rise 2.9% to A$6.275, jumping the most
since Jan. 14
** Stanmore Resources SMR.AX jumps 2.4% to A$2.765, most
since Jan. 14, while Coronado Global Resources CRN.AX is up
3.4%
** Aussie mining index .AXMM is up 1.8%
(Reporting by Nichiket Sunil in Bengaluru)
((Nichiket.Sunil@thomsonreuters.com;))