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目前,在裂隙大的岩层和矿体中钻进时,采用T?-2型和T?H-4型的双管岩心钻具,配以59毫米或76毫米的金刚石钻头,岩心和矿心采取率应不低于70%.但是,采用这种钻具进行钻进,不是经常能够达到高指标,以致降低了工程质量.因此,为了能在极复杂的条件下进行钻进,试制了一种配备有正常胎体厚度的金刚石钻头的T?H-K1型岩心钻具(图1).T?H-K1型钻具可以在9～12级裂隙大或裂隙小的岩层和矿体中采取岩心和矿心.钻具是由外管
At present, when drilling in large fractures and ore bodies, the T-2 and T-H-4 double-tube core drilling tools, together with 59 mm or 76 mm diamond bits, cores and cores The adoption rate should be not less than 70% .However, drilling with this type of drilling tool is not always able to achieve high targets, thus reducing the quality of the project.Therefore, in order to be able to carry out drilling in extremely complicated conditions, A T-H-K1 core drill equipped with a diamond core of normal carcass thickness (Figure 1) can be used in rock formations and mines with large or small fissures 9-12 Take core and core. The drill is made of outer tube