An Elementary Study Of The Technology Of Seismic Exploration Of Coalfield In Mountain Area

With the development of computer and electronic technology in the geophyics,seismeic exploration have great advance and the seismic work structure also change very sharp,espisical the complex montane condition .So it's very important and urgency to research seismic technique in complex montane.Objective:For gaing good record and proving good data for data process and interpreting ,we must adjust suitable requirement to local condition .The requirement ,data processing and interpreting are together in line .If they are disargulated ,the results are wrong and we can't complete the work.Method:We make use of seismic reflection to exploration. If there are rivers and villages where the shot and geophone are not placed on the line ,we have to adopt appropriate offset for gaining purpose layers under rivers and villages.We process data by poststack time shit and recovolution to improve signal to noise ratio and resolution.Conclusions:1,We inform the coral layers distribution is on the slop of sag by the compare between drill and section.2,The coal ,cover and underlain Cretaceous in Heishi-Tala area of Dunhua city is on western margin uplift to Western and two sags and uplift to Eastern.3,We identity the faults characters with big throws and the faults extend .4,In complex mountain areas ,the first is to collect old geology data that are useful for seismic exploration.The second is to analysis various parameters.We researched the result form surface to subterranean ,form superficial to deep,form macroscop to microcosmic.5,Thhe wide basalt with various thickness and many layers affects the seismic reflection by shield the wave .The acquisition data may lost useful signal ,and the interpretation results didn't reliable。At present,there is no good method to overcome the basalt influence.6,Crest movement and magma activity are strong。The denudation surface and overlaying sedimentary rock will form intensive reflection。It is easy to confuse with coal layer。So we need drill to help us identy.7,Well log and drill are direct exploration method and have information on a point.But seisimic reflection is indirect and has information on planar.Seisimic reflection ,well log and drill are together to survey,then we can integrate all information form point to line and planer to improve the ability of exploration on complex area.