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目前，在金刚石钻进中，钻头胎块脱落事故尚未能完全避免。胎块脱落后，若发现的早，还比较容易捞取。若发现不及时，将造成钻头的进一步崩落损坏，以致很难彻底捞净，这将给以后钻进造成更大的困难。分析胎块脱落的原因是多方面的。如下钻碰撞套管或孔底；钻进操作不注意产生严重挤夹；孔内不清洁；钻进坚硬裂隙地层；深孔倒立轴时没有悬吊钻具等。总之，这些都是外因，操作中应力求避免发生。从内因方面检查，主要是胎体与钢体的结合力（结合强度）不够而造成。例如，一些钻头正常使用仅一、二个回次就出现了胎体沿与钢体的结合面整个脱掉现象。这种情况出现虽不多，但也并不罕见。
At present, in the diamond drilling, drill bit shedding accident has not been completely avoided. After the block falls off, if found early, still more easy to fish. If not found in time, will lead to further collapse of the drill bit damaged, making it difficult to completely clean the net, which will cause greater difficulties drilling later. Analysis of the reasons for the fall of the block is many. The following drilling collision casing or hole bottom; drilling operation does not pay attention to produce a serious squeeze folder; hole is not clean; drilled hard crack formation; deep hole inverted shaft without hanging drill. In short, these are external factors, the operation should strive to avoid occurrence. From the internal aspects of inspection, mainly carcass and the binding force of steel (bonding strength) is not enough. For example, some drill normal use only one or two back to appear the carcass along with the steel body combined with the whole take off phenomenon. Although this is not the case, it is not uncommon.