Research On The Complex Geological Conditions Of Coal Mining Induced Surface Crack Is Presented

The development of the national economy and the progress of social are inseparable fromthe sources of energy，coal resources plays an important role in our energy structure. In theconstruction of the motherland and the living of people, at the same time, the exploitation of coalmining area also caused bigger range and a greater degree of geological and surface damage. Inwhich, as a form of destruction surface subsidence induced by crack coal mining has beenaffected the people’s production and life seriously in mining area, in residential area where aresurface cracks will appear crack, inclined, serious cases will cause housing lost use value. Whichthreat to people’s life and caused a great loss of people’s property; if surface cracks cross thehighway will cause pavement cracking, blocking traffic, even casualties; At the same time, thesurface cracks may cause farmland cracking, farmland water retention capacity decrease,farming area decreases, crop production decreases. The larger surface cracks will cause peopleand agriculture machinery’s subsidence accidents, threat to the life and production of the farmer.The reasons of surface crack by mining induced varied, so that between different surface cracks,there are both the differences and connections, exploring the formation reason of surface crackinduced by underground coal mining, predict to the mining area surface crack, so that make theunderground coal mining induced surface crack disaster loss to the minimum.In the light of the current situation above, on the basis of the research on the relevant contenof surface cracks, analyze and summarize on the state, failure law, origin and prediction ofsurface crack induced by underground coal mining in different geological conditions anddifferent mining methods; which gives a clear method of inquiry the surface crack induced bythe underground coal mining and the prediction method of the surface crack possibility happensin the future. In this method solved under the guidance of a large surface mines the causes ofcracks explored; will support vector machine theory introduced into the surface of the work isexpected to crack. Through the mining area of a given region to the region is expected to surfacedeformation can form surface crack expectations.