Even with modern methods of directional drilling, we have not yet eliminated deviation, i.e., uncontrolled departure of the ... Owing to this, a hole drilled to the planned depth often fails to emerge into the required working, or even into an adjacent one. The search for such boreholes, if done blindly, involves much labor in the cutting of auxiliary workings, and does not ... Our suggested version of the audiometric method for finding boreholes from underground workings is free from theseanbsp;...
|Title||:||Seismo-Acoustic Methods in Mining / Primenenie Seismoakusticheskikh Metodov v Gornom Dele / Применение Сеисмоакустических Методов в Горном Деле|
|Author||:||M. S. Antsyferov|
|Publisher||:||Springer Science & Business Media - 2012-12-06|