Drawings can be made using hundreds of different styles and techniques. One of my favourite approaches to creating new art work can be done in very few steps, all you need to create this piece is some charcoal dust and a fairly large brush so you can give your paper a light grey overlay, a few shades of pencils to give your drawing a good tonal range, an eraser to create some depth in your drawing and something to blend your pencil shading with, i.e a blending stump or some tissue.
The first step is very simple, all I have done to create this effect is lightly sprinkle some charcoal dust over my paper. - you can buy charcoal already crushed like this or as charcoal sticks. I just do it myself with a sharpener and a hard blunt object to make it as fine as possible, the finer the charcoal is the better it lays on the paper.
Once the charcoal is on the paper, very lightly dust it around in strokes or in a circular motion to spread it out as evenly as you need it. Remove the remaining dust and keep it for another time. Then you are ready to move on to the next step.