bottom mine
4.By means of similar simulation, lateral abutment pressure distribution and concentration degree which at the face of the upper coal, the distance between peak stress and coal surface, the influence circle of abutment pressure, and the transfer and weakening of concentrated pressure at the bottom side are analyzed on actual geology data in Pingdingshan 8th mine F15 and F(subscript 16-17).
5.In this paper,the authors draw the measures such as integrating the filling,dissimilar direction mine "from bottom to top",water stop by curtain grouting and fore-drainage in mining pit by analysis the actuality of subsidence hazard which is leaded by exploiting mine such as coal,aurum,iron,gypsum,steatite,and the development trend of the major digging.
6.Based on analyzing many algorithms, propose an efficient new algorithm for mining maximal frequent itemsets, CPMMFIA (mine maximal frequent itemsets algorithm based on condition pattern). This algorithm adopts the tactics from top to bottom, depth first, is very suitable for mining maximal frequent itemsets.
7.Abstract: Analysis on core samples of 3 mine areas in Huaibei-Huainan Coalfield,Anhui Province shows that the Bottom Aquifers of thick Cenozoic formation in each area are different in gravel lithology and fine grain mineral composition.Morphology and size parameters manifest paleo-transpot-agents of the sediments high-energy,high-density and temporality.It is proved that the Bottom Aquifer was composed of diluvial-alluvial deposition and beds bearing gravel were mainly formed by rapid mud-rock flow in fault basins during Miocene epoch when the paleoclimate was warm and dry.
