Coal mine floor limestone aquifers are a major source of water inrush from the coal seam and serious threat to safety mining. In order reduce avoid occurrence within mine, we use multiple detection techniques, which geophysical exploration technology, drilling accidents tracer test, develop multi-faceted karst development analyze its characteristics in Chaochuan No. 1 well. The results show tha...

Cold clouds are the main operation target of artificial precipitation enhancement, and its key is to find a supercooled cloud water area where catalyst can be seeded promote formation particles increase ground. Based on multi-spectral characteristics Fengyun-4A (FY-4A) satellite, methodology for identifying developed. Superimposed by top brightness temperature 10.8 µm, combination 0.46 1.6 2.2 ...

the hydrolysis of cadmium nitrate was studied spectrophotometrically at different ionic strengthsof sodium perchlorate in a wide ph range, 1-12, and at 25 c. least squares calculations areconsistent with the formation of m(oh)+, m(oh)2, m(oh)3- and m(oh)42- species, which m iscd2+. the dependency on ionic strength in the background electrolyte solutions was taken intoaccount by using a debye-hu...

the main purpose of this research paper is to compare qiujiahe formation (є1q) and longmaxi formation (s1ln) in north sichuan basin where shale gas exploration has not been fully researched, and hence represents the possibility of shale gas concentration under the complex geological conditions. based on valid laboratorial analysis, there are optimistic prospects for є1q and s1ln of research are...