RE: can someone explain... You're thinking cash and just cash. The bond is not part of the 814 million in cash and cash equivalents.
The bond (just like money received from investors - IPO) has been invested in trucks, equipment, a mine and reserves in the ground. Sure if the company was to liquidate today,they would pay back the bond with cash, but they would have a lot more cash from selling the the trucks, equipment, the mines, and reserves, the little goodwill the comapny has :) etc...
Don't think of them putting out a bond and hording the cash in the bank, that's not what happened. The company is worth a lot more than that 814 million in cash. It's equity is closer to $4 billion... and that on the books at historical (not fair market) value.