poem help need to identify 4 poetic devices for this poem its calls inside the great pyramid by Gwendolyn Macewen and i also need to find the meaning...

"All day the narrow shaft" places this poem in a mine shaft setting. There
are a couple of reasons that the poetic speaker does not trust the shaft. One is that it is
detrimental to health:

everyone 
came out
sweating and
gasping for air, and one 
old man collapsed
upon a
stair

Another is the age of the shaft that is implied in
the second stanza:

i thought 
the fact that it
has stood 
so long 
is no guarantee 
it will stand today.

The theme that these particulars point to is revealed in the last
lines: the mine shaft leads to the interior of the earth that is the "the great waterclock
of earth" that counts of the hours till an entrants death.