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1978年9月期间,在内华达州杰拉什附近黑岩沙漠地区(图1)对所采用的测试系统进行了第一次综合野外试验。试验孔钻在细粒松散的更新世或全新世湖相沉积层中,该层典型
The first comprehensive field trial of the test system used was conducted in September 1978 in the Black Rock Desert near Jerash, Nevada (Figure 1). The pilot hole is drilled in a loosely loose Pleistocene or Holocene lacustrine sedimentary layer that is typical