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在毛主席的无产阶级革命路线指引下,在各级党委的关怀及领导下,在兄弟单位的大力支持下,我队进行了金刚石钻头试验,并取得了一定的成绩。兹将我们的作法介绍如下:一、试验地区的地质条件我队勘探区的地层自上而下为:飞仙关灰岩,长兴灰岩,龙潭组,茅口灰岩。飞仙关灰岩硬度4～6级,厚10～450米。长兴灰岩硬度7～9级,厚140～300米(其中第四层和第二层含大量燧石结核,硬度10～12级)。龙潭组硬度一般3～7级(其中龙
Guided by Chairman Mao’s proletarian revolutionary line and under the care and leadership of Party committees at all levels and with the strong support of our brother units, our team conducted diamond bit tests and achieved some success. We hereby introduce our practices as follows: I. Geological Conditions in the Experimental Area The strata in the exploration area of our team are top-down from Feixianguan limestone, Changxing limestone, Longtan formation and Maokou limestone. Feixianguan limestone hardness of 4 to 6, thickness 10 to 450 meters. Changxing limestone hardness of 7 to 9, 140 to 300 meters thick (of which the fourth and second layers contain a large amount of flint nodules, hardness 10 to 12). Longtan group hardness generally 3 to 7 (of which dragon