distance of one hundred feet thereof, and such abandoned, mine
cannot be explored, or when same contains fire-damp, or water which
may inundate such working place, the mine-foreman shall not permit
such working place to be advanced until a drill hole has been
extended not less than twelve feet in the center of such working
place, and a flank hole not less than twelve feet extended on each
rib, starting at the working place after taking out each cut or
crossing. Whenever the limits of the workings of an abandoned mine
are not known by actual survey, the above rule shall apply whenever
any working place approaches within one hundred and fifty feet of
the supposed limits of such abandoned mine. In addition to the
precautions provided for in this act when approaching or working
parallel with such an abandoned mine, the owner, lessee or agent
shall, upon the demand of the chief inspector or district inspector
of mines, provide competent shot firers to do the shot firing in all
the working places advancing or running parallel with such abandoned
mine; the shot firing to be done when all other workmen are out of
the mine. The chief inspector or district inspector of mines shall
order shot firers at any mine when in their judgment the safety of
property or employes require same. (103 O.L. 500.)


Sec. 939. [=Notice must be sent to chief inspector in certain
cases.=] The owner, lessee or agent of a mine shall give notice to
the chief inspector of mines in the following cases: When a change
occurs in the name of the mine, in the name of the owner, lessee or
agent thereof, or in the officers of an incorporated company owning
or operating such mine; when a working is commenced for the opening
of a new shaft, slope or mine; when a mine is abandoned, or the
working thereof discontinued; when the working of a mine is