@Shchors and outlaw: At the very least both large motorways to Donezk, Makiivka and Horlivka, the M04 and the H21 seem to be at the center of rather intense fights. The H21 runs in this fought over area through the urban areas of Shaktarsk, Torez and Shinzne and turns then northeast to Krasnyi Luch. Between them there is a not too dense network of roads, little rivers and almost only flat terrain which should be dry. So supplies to the west should be possible.
Donezk and Makiivka form a large urban hub. The recent 'pincer' offensive obviously bypassed this densly settled area and hit in far more open terrain.
http://gdb.rferl.org/4F9E72E4-E8F4-4...mw1024_s_n.jpg
As usual one should be quite careful with those maps, taking fog of war and party interests in mind.