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戈塘矿区是微细粒浸染型金矿，金成微细粒（粒径小于0.037mm，有的甚至小于0.01mm）分散在矿层中，当矿心破碎时，微细金粒可以被冲洗液带走，至使矿体品位贫化。如何提高矿心的完整度问题，成了保证钻探质量的关键。我省地矿局针对这一问题，1985年专门下文明确了该矿种取出的矿心柱，块状应达到整个矿心的60％以上（规定粒径大于1cm的视为块状，块度大于5cm的为柱状），如矿层松散破碎时，只要保持原来结构，可视为达到标准。对该矿种矿心完整度的要求，已作为验收钻孔的一项重要指标。
Ge Tong mining area is a fine-grained disseminated gold, gold into micro-particles (particle size less than 0.037mm, and some even less than 0.01mm) dispersed in the mine, when the core is broken, the fine gold particles can be rinse away, to So that the ore grade depletion. How to improve the integrity of the core has become the key to ensure the quality of drilling. In order to solve this problem, the Bureau of Geology and Mineral Resources of our province specified in 1985 that the following mining pillar should be removed from the mine, and the block should reach over 60% of the total size of the ore (specified as a block with a grain size larger than 1 cm, More than 5cm for the columnar), such as the loose layer when broken, as long as the original structure, can be considered to meet the standards. The mineral integrity of the mine requirements, has been accepted as an important indicator of drilling.