At your weight I suggest running a higher tire pressure. if you go lower you will get "pinch flats." This occurs when you hit a bump, the tire compresses and the rim causes two little bite-like holes in the tube (basically the tube gets pinched between the road and the rim).

As for major blowouts... flats on bike tires tend to be slow leakers more than BLOWOUTS. You usually just look down and see that the tire is going soft, pedaling gets difficult, you pull over and change it. Often times I get home, put the bike away, get it out the next day and find that I have a flat.