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Моделирование ударных нагрузок при бурении сложноструктурных горных массивов

Моделирование ударных нагрузок при бурении сложноструктурных горных массивов

Abstract

The analysis of time between failures of roller bit chisels shows considerable decrease in their firmness in case of breed drilling with difficult structure. The problem of decrease in firmness of chisels at frequent changes of properties of breed can be solved by use of the adaptive rotary submitting mechanism capable in due time to define various changes of properties of breed and to react, correcting a drilling mode. The method of modeling of shock loadings at drilling of rocks with difficult structure consists in measurement of pressure jumps in the hydrocylinder and a current in a winding of the engine, caused is artificial the created hydroblows. For process of modeling of shock loadings the laboratory research stand, allowing to model the shock loadings arising at increase in an indicator of drilling capacity on various (set) size at various relative values of an indicator of drilling capacity before and after blow was developed and made. In the research stand as a drive the system from the three-phase asynchronous engine with a short-circuited rotor and the pump of volume action is applied.

Анализ наработок на отказ шарошечных долот показывает значительное снижение их стойкости в случае бурения породы со сложной структурой. Проблема снижения стойкости долот при частых изменениях свойств породы может быть решена применением адаптивного вращательно-подающего механизма, способного своевременно определять различные изменения свойств породы и реагировать, корректируя режим бурения. метод моделирования ударных нагрузок при бурении сложноструктурных горных массивов заключается в измерении скачков давления в гидроцилиндре и тока в обмотке двигателя, вызываемых искусственно созданными гидроударами. Для процесса моделирования ударных нагрузок был разработан и изготовлен лабораторный исследовательский стенд, позволяющий моделировать ударные нагрузки, возникающие при увеличении показателя буримости на различную (заданную) величину при различных относительных значениях показателя буримости до и после удара. В исследовательском стенде в качестве привода применена система из трехфазного асинхронного двигателя с короткозамкнутым ротором и насоса объемного действия.

Keywords

МОДЕЛИРОВАНИЕ УДАРНЫХ НАГРУЗОК, БУРЕНИЕ СЛОЖНОСТРУКТУРНЫХ ГОРНЫХ МАССИВОВ, ИССЛЕДОВАТЕЛЬСКИЙ СТЕНД, КОЛЕБАНИЕ ВЕЛИЧИНЫ ТОКА, ОБМОТКА ЭЛЕКТРОДВИГАТЕЛЯ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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