Okla. Stat. tit. 45, § 45-525: Precautions in dangerous workings

In any place that is being driven towards, or in dangerous

proximity to, an abandoned mine or part of mine, suspected of

containing inflammable, noxious or poisonous gases, or which may be

inundated with water, boreholes shall be kept not less than twelve

(12) feet in advance of the face and on the sides of such working

places, said side holes of the same depth shall be drilled

diagonally, not more than eight (8) feet apart, and at any place

driven to tap water or gas, shall not be more than ten (10) feet

wide, and no water or gas, from an abandoned mine, or part of a

mine, and no boreholes from the surface shall be tapped until the

employees, except those engaged at such work, are out of the mines,

and such work is to be done under the immediate supervision of the

mine foreman.