CAJ | 학술논문

湖南湘西碳酸盐岩山区不同时期灰岩出露，岩性变化较大，且受风化、淋滤、剥蚀作用，溶洞、裂缝十分发育，导致地震波能量衰减严重，且地震波传播路径和地震波场的复杂，地震原始资料信噪比较低。针对上述问题，采用单/双井微测井相结合的精细浅表层结构调查方法，结合药柱长度和爆炸理论计算出的爆炸半径，动态设计井深激发方式。通过室内模拟计算，研究低频检波器多串、线性等组合接收方式在区内压制面波、折射波、多次折射及侧面波等多波干扰的效果，最终选择2串24个检波器等灵敏度组合及小道距、高覆盖观测等关键采集技术。实践表明，该区选择的观测系统较好的克服了南方岩溶地区地震勘探信噪比低的问题，具有极强的推广价值。
호남상서탄산염암산구불동시기회암출로，암성변화교대，차수풍화、림려、박식작용，용동、렬봉십분발육，도치지진파능량쇠감엄중，차지진파전파로경화지진파장적복잡，지진원시자료신조비교저。침대상술문제，채용단/쌍정미측정상결합적정세천표층결구조사방법，결합약주장도화폭작이론계산출적폭작반경，동태설계정심격발방식。통과실내모의계산，연구저빈검파기다천、선성등조합접수방식재구내압제면파、절사파、다차절사급측면파등다파간우적효과，최종선택2천24개검파기등령민도조합급소도거、고복개관측등관건채집기술。실천표명，해구선택적관측계통교호적극복료남방암용지구지진감탐신조비저적문제，구유겁강적추엄개치。
The outcropped limestone of various periods in carbonate rock mountainous region, western Hunan, their lithology varies greatly. Because of weathering, leaching and denudation, bring on karst caves and fissures well developed, thus result in serious attenu?ation of seismic wave energy, as well as complex wave propagation path, rather low original data signal to noise ratio. In allusion to above issues, using single/double well micro-logging adjoined precise near-surface structure examination combined with seismic charge column length and explosion theory calculated explosion radius, dynamically designed well depth and shot mode. Through in?door simulation, studied low-frequency geophone multiple strings, linear array receiving and the like modes to suppress multi-wave in?terferences from ground roll, refraction, repeated refraction and lateral wave in the area, finally selected key acquisition technologies of 2 strings, 24 geophones equal sensitivity array and small group interval, multifold observation etc. Practices have demonstrated that field setup selected for the area has overcome low signal to noise ratio in seismic prospecting in southern karst regions better, so it is in possession of strong popularization value.