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由一机部洛阳矿山机器厂针对两淮煤田建井地质条件而专门设计制造的AS-9/500型竖井钻井机已于今年3月在淮南潘三西风井正式开钻。由两淮特凿公司一处用该新钻机钻凿风井全深,钻井直径为9米。该风井全深513.2米,穿过表土层厚度为440.82米,其中含水砂性土层250.74米,单层砂厚达81.39米。最后钻凿岩石层厚度为72.38米,为井全深的14％。据检查孔资料,钻井将穿过8个砾石层,砾径一般为10～30毫米,最大50毫米,但有遇到更大卵石结块的可能性。这次钻井施工还面临深井泥浆护壁问
AS-9/500 shaft drilling rig specially designed and manufactured by Luoyang Mining Machinery Factory of a machine department for the geological conditions of Jianghuai coalfield drilling has been officially started drilling at Huanshan Pan San Wailway in March this year. The two drilling company with a single use of the new drilling rig drilling full depth, drilling diameter of 9 meters. The full depth of 513.2 m of the shaft, through the topsoil thickness of 440.82 meters, of which sandy soil layer 250.74 meters, monolayer thickness of 81.39 meters. The final drilled rock layer thickness was 72.38 meters, 14% of the well depth. According to the inspection hole data, the drilling will go through eight gravel layers with a gravel diameter of 10-30 mm and a maximum of 50 mm, but with the possibility of larger pebbles being caked. The drilling construction is also facing deep mud wall asked