Fiber Redundancy

I'm installing a 12 strand MM fiber cable in a coal mine. "the fiber will be running through the mine tunnels" .  I plan on having a dual fiber 8 ethernet port switch every 1000 ft.  4 strands of the fiber will be used the others are spairs and for the addition of equipment in the future.  these switches will be daisy chained so to speak.   there will be 20 plus switches ending at network segment connect back to the main network via T1.    Is there anyway using spanning tree or anything else, to make a redundant loop, so as if the fiber fails somewhere in the middle, that the switches will send traffic out the other side of the fiber and up to the other network and back through the T1?  


this is what it will look like
 ________________________________T1_________________________________________  
 |                                                                                                                                                     |
Network---------fiber-----<switch>-----fiber------<switch>----fiber------<switch>----fiber-----network

thanks in advance