Congo (DRC) SICOMINES mining project, is a geological exploration, hydrological geological exploration, engineering geology, geotechnical engineering, large-diameter core Xuanye test in one of the international large construction projects, covering geological exploration, drilling, hydrology, engineering, surveying, geophysical exploration, geotechnical testing and other integrated professional and technical fields. From June 2009 to March 2011, China successfully completed the survey in this hospital were mining a supplementary geological exploration, two additional geological exploration, hydrogeology engineering geology, industrial plant and tailings geotechnical engineering investigation, Xuanye test large-diameter coring project and other projects.
SICOMINES copper and cobalt mining, hydro-geological engineering geological conditions are extremely complex large metal mines copper and cobalt. The mine is located KOLWEZI nappe body double, fold structure development, structural interlayer fracture zone or fracture zone development, complex formation, multiple alternating layers of hard and soft, some lots weathered a strong, common alteration zone, fault zone, fracture zone, voids, etc., water activity is strong.
In the case of such a complex formation, China successfully completed the supplementary survey of Hospitals 209 geological exploration drilling, a total of 58,574 linear meters of proven reserves of a large metal mines and resources and ore grade; Hydrogeology and Engineering Geology Exploration completed a total of 69 holes , namely, 18,928 linear meters (inclusive of 7 large-diameter hole pumping test, 2183m), were carried out and the group bore hole pumping test to obtain a certain amount of hydro-geological parameters, to master this complex path complement mine drainage force contact and estimated the mine water inflow; made rock sample test data, the stability evaluation of slope mining.
At home and abroad, in the basement complex areas in which deep, large diameter core of the success stories are rare. But the big test in the dressing and smelting continuous drill core projects, our hospital rose to the challenge, active and innovative, large-diameter core hole challenging new technology. According to the special construction of a large drill, drill to improve the ordinary into a tube-shaped cone type cone drill, drill a large hole to improve the quality of, and for different strata, developed a single tube in the tubular hole, double action Double tubular drill pipe, tube-shaped single-action double barrel drill. Eventually to the final hole diameter φ377mm (core diameter φ340mm) to achieve the success of the 360 meter deep core hole. Maximum core diameter of the φ450mm, six drilling, rock and mineral samples 25T eventually made to meet the requirements of the dressing and smelting tests, greatly impressed the owners!