"IMPROVING THE EFFICIENCY OF DRILLING OPERATIONS IN COAL MINES DURING ANCHORING OF MINE WORKINGS"

Abstract

. Improving the efficiency of rotary hole drilling for anchoring can be achieved through two ways: improving the quality of mining planning and using more modern mining tools. The use of modern high-performance drilling machines requires the use of drill rods with increased durability, as well as providing improved removal of drilled rock from the borehole. Poor removal of drill fines leads to their overgrinding, which contributes to an increase in the energy intensity of the drilling process. The paper proposes a design of a drilling rod with a cross-section in the form of a Realeaux triangle for rotary drilling of boreholes in the mine workings of coal mines during the mounting of anchoring. A comparative study of the developed rod design and commercially available rods has been carried out to determine their strength, weight and free space for removing drill fines from the borehole. Mathematical dependencies have been established, which allow planning of drilling speed when using hydraulic and pneumatic machines with cutters of three-feather design.