Xu, Dongjing
Peng, Suping
Xiang, Shiyao
Liang, Mingxing
Liu, Wenming
Funding for this research was provided by:
the National Science and Technology Supporting Program (2012BAB13B01)
National Key Scientific Instrument and Equipment Development Program (2012YQ030126)
Coal United Project of National Natural Science Foundation (U1261203)
China Geological Survey Project (1212011220798)
the National Science and Technology Major Project (2011ZX05035-004-001HZ)