In the past decades,the intense excavation of coal resources in China has induced a series of severe waterrelated disasters or problems,such as water burst accidents,severe groundwater depletion and contamination.All ...In the past decades,the intense excavation of coal resources in China has induced a series of severe waterrelated disasters or problems,such as water burst accidents,severe groundwater depletion and contamination.All of these problems were caused by the structural changes of roof rocks or bed rocks induced by coal excavation.The structure of collapsed roof rocks is generally classified into three zones：falling zone.展开更多
A freezing wind sweeps through the narrow Tibetan valley,whistling over the sand,stones and dry grass,buffeting the grazing sheep and the low houses of the tiny village which nestles there at an altitude of 4,600 mete...A freezing wind sweeps through the narrow Tibetan valley,whistling over the sand,stones and dry grass,buffeting the grazing sheep and the low houses of the tiny village which nestles there at an altitude of 4,600 meters.High overhead white clouds scud across skies of an unimaginably intense cobalt blue.Towards the south,the glistening peak of Everest rises momentarily from amidst the bank of clouds which hover over the barren ochre slopes already in autumnal garb and heralding the onset of winter.The farmers have been busy gathering展开更多
IT was during the Cultural Revolution, in, the year that I turned 16, that I put on an army uniform, got on a train, and left Beijing for Urumqi in Xinjiang Uygur Autonomous Region. After six days of driving on the va...IT was during the Cultural Revolution, in, the year that I turned 16, that I put on an army uniform, got on a train, and left Beijing for Urumqi in Xinjiang Uygur Autonomous Region. After six days of driving on the vast Gobi Desert, I reached Kashi of southern Xinjiang. After another six days’ severe jolting, I arrived at the hig’nest land in China. I was one of the five first women展开更多
文摘In the past decades,the intense excavation of coal resources in China has induced a series of severe waterrelated disasters or problems,such as water burst accidents,severe groundwater depletion and contamination.All of these problems were caused by the structural changes of roof rocks or bed rocks induced by coal excavation.The structure of collapsed roof rocks is generally classified into three zones：falling zone.
文摘A freezing wind sweeps through the narrow Tibetan valley,whistling over the sand,stones and dry grass,buffeting the grazing sheep and the low houses of the tiny village which nestles there at an altitude of 4,600 meters.High overhead white clouds scud across skies of an unimaginably intense cobalt blue.Towards the south,the glistening peak of Everest rises momentarily from amidst the bank of clouds which hover over the barren ochre slopes already in autumnal garb and heralding the onset of winter.The farmers have been busy gathering
文摘IT was during the Cultural Revolution, in, the year that I turned 16, that I put on an army uniform, got on a train, and left Beijing for Urumqi in Xinjiang Uygur Autonomous Region. After six days of driving on the vast Gobi Desert, I reached Kashi of southern Xinjiang. After another six days’ severe jolting, I arrived at the hig’nest land in China. I was one of the five first women
