【摘要】 针对戈壁地区松散的砾石层地震信号衰减快、频率降低和能量减弱的特点,以及煤层倾角大、煤层埋藏深度变化大和潜水面的影响,笔者对戈壁地区煤田地震勘探的野外采集技术难点进行了分析探讨,并提出相应的技术对策:1地表条件复杂、潜水位变化大的地区采用汽车钻机成孔。2煤层埋藏深度小、倾角小于15°的地区采取小排列、小药量、中点放炮激发。3煤层埋藏深度大、倾角大于15°的地区采取大排列,能量足够情况下,采用小药量、端点放炮激发。最后通过实例补充说明。更多还原

【Abstract】 In Gobi area with loose gravel bed,the seismic signal attenuates fast,making frequency and energy be lowered;in addition,the coal seam has a changeable buried depth and steep dip angle.Aiming at this problem,we analyzed the difficulties of gathering seismic data in coal field and proposed some corresponding technical countermeasures:①Using car-drill into a hole in complex surface where has complex conditions and changeable water table;② in the area where the burial depth of coal seam is shallow and the dip angle is less than 45°,a small order,a small amount of explosives,and mid-point shooting excitation are used;③ in the area where the burial depth of coal seam is big and the dip angle issteeper than 45°,a large orde,a small amount of explosives,and the endpoint excitation are used.更多还原