unbalanced shothole

unbalanced shothole

[¦ən′bal·ənst ′shät‚hōl]
(mining engineering)
A shothole in which the explosive charge breaks down the coal at the back of the machine cut while leaving the front portion standing or in large blocks.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.