Оценка свойств горных пород при перфораторном бурении и эффективности работы коронок по состоянию твердосплавного вооружения после амортизации инструмента

摘要

In the article the specified data defining the properties of rocks in a bore-hole based on the udcoefficient of percussion drill ability К are resulted in view of the disturbers caused by the arisen udzone of residual pressure and cracks of pre-destruction; the method of the boring tool researches is udoffered basing on the condition of its hard-alloy supply after drilling with use of digital cameras; it udis shown, that using of hard-alloy inserts of cutting type on periphery of pin bits essentially increase udtheir resistance; mechanism of rock’s destruction by pin bits is considered, which allows to improveudthe tool and modes of drilling.