- 行业: Mining
 
- Number of terms: 33118
 
- Number of blossaries: 0
 
- Company Profile:
                        
 
  
                                                        The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...                             
                                                     
                        Mining or excavating beds of existing rivers after deflecting their course, or by dredging without changing the flow of water.    
    
    						Industry:Mining    
									Mining that takes place in igneous and metamorphic rock by means of drilling and blasting to extract the ore.    
    
    						Industry:Mining    
									Mining two or more seams of coal, frequently close together, that can be mined profitably where mining one alone would not be profitable.    
    
    						Industry:Mining    
									Minor breaks sometimes developed in the rocks along a fault plane. They often indicate the general direction of movement and were caused by differential tension in the rocks contiguous to the main fault plane. See: tension fracture    
    
    						Industry:Mining    
									Minor faulting that diverges from a longer dislocation at an acute angle.    
    
    						Industry:Mining    
									Minute crystals or crystalline particles which compose a granular crystalline aggregate. Distinguished from minute fiberlike crystals which compose fibrous crystalline aggregates.    
    
    						Industry:Mining    
									Minute globules thrown up from the surface of molten copper, when it contains but little suboxide.    
    
    						Industry:Mining    
									Minute particles of anthracite too fine to be used in ordinary combustion.    
    
    						Industry:Mining