Truth-Preserving Coring Tool for Broken and Soft Mineral Stratum

It is very important for evaluating mineral resources to get representative original rock and mineral core sample accurately and reliably, however, it is difficult to get high-quality core samples which were representative with existing core drill tool in soft and broken mineral stratum. This paper introduces a truth-preserving coring tool which used for improving the quality of coring in soft and broken mineral stratum, and the structure and work principle of coring tool were elaborated. Meanwhile, we have analyzed and calculated coring movement and force of the tool. Finally, there is an effect of the field test which was introduced briefly. Study indicates: the new truth-preserving coring tool owned many advantages that were innovative design ideas, simple structure, easy operation, and can improve core quality in soft and broken mineral stratum significantly.