煤矿采空区下组煤三维地震勘探技术

3D seismic exploration technology for lower coal group in gob area

利用三维地震勘探技术探测老窑采空区的位置和范围,已取得了很好的效果,但是对于采空区下组煤的探测,还处于探索阶段。总结了采空区下组煤地震反射波特征,分析了影响下组煤探测效果的主要因素,提出了采取"高覆盖次数、单深井激发、大药量、中低频检波器、变观"等手段,可以获得具有较高信噪比的下组煤层地震信息,说明三维地震方法探测采空区下组煤是可行的。

Using 3D seismic exploration technology to survey the location and scope of gob area has achieved good results, but prospecting lower coal group in gob area is still in the exploratory stage. The paper summarized the geophysical characteristics of lower coal group in gob area and analyzed the main factors influenceing exploration results. After multiple tests, we adopted ＂multiple stacks, single deep-well exciting, large-volum, low-frequency detector, variable parameter of viewing system＂, the high signal-to-noise ratio seismic information of lower coal group was achieved, indicating that using 3D seismic exploration technology to survey lower coal group is feasible.