Each person who performs labor in opening or developing any coal mine, mining coal, and labor connected therewith, shall have a lien upon all the property of the person, firm or corporation owning, constructing or operating such mine, for the value of such labor for the full amount thereof, upon the same terms, as mechanic's liens are secured and enforced. (103 O. Laws 67.) =RELATING TO OIL AND GAS WELLS THROUGH COAL MEASURES.= =Owner of well shall make and file map.= Sec. 973. Any person, firm or corporation holding property in any coal bearing or coal producing township, in any county of the state of Ohio, either in fee, by virtue of a lease for oil or gas, mining purposes since January first, 1900, or otherwise, whereon wells have been drilled for oil, gas or test purposes, shall cause to be made by a competent engineer, an accurate map on a scale of not less than one inch to four hundred feet, showing on said map the location and number of wells as near as the same can be located, that have been drilled, whether or not any of such wells have been previously abandoned, or were drilled and abandoned by former operators, who have ever held the said property for oil, gas or mining purposes. Said map shall show the name and address of the person, firm or corporation owning said well or wells, the county and township, the names of the adjoining property owners, and lines of the property operated with the distances of the wells properly measured therefrom and checked from the section and quarter section lines, as will be necessary for an accurate survey. The map shall show all the engineer's notations of angles, distances, starting point, or corner stones, together with the numbers given the respective wells, giving a legend as to the manner in which various abandoned or producing wells, are designated. The original map shall be retained by the owner or his agent, and one copy filed with the industrial commission of Ohio, division of mines, said copy showing thereon the sworn statement of the engineer making the map that same is correct. =Well shall not be near mine opening.= No oil well, gas well or test well shall be drilled nearer than three hundred feet to any opening to a mine used as a means of ingress or egress for persons employed therein, nor nearer than one hundred feet to any building or inflammable structure connected therewith, and actually used as a part of the operating equipment of said mine. =Persons drilling oil and gas wells in coal bearing or coal producing townships.=