Roof support; bolts; installation; minimum standards
Sec. 1. (a) Adequate minimum standards for roof support suitable
to the roof conditions and mining system of each mine shall be
adopted and followed after written approval of the director. Such
standards shall show the minimum number and the location of
supports, such as posts, cross bars, or bolts, that shall be installed.
(b) Minimum standards adopted for the installation of bolts as a
means of roof support shall include the following:
(1) Type of bolt.
(2) Dimensions of bolt.
(3) Spacing of bolts.
(4) Maximum width of place where bolts are installed.
(5) Maximum distance from face where bolts are to be installed.
(6) Type and size of bearing plates.
(7) Safety precautions to be taken.
(8) Timbers to be set, if any, in connection with bolting.
(9) Area of mine involved.
(c) If roof bolts are used, openings that exceed twenty (20) feet in
width must also be supported by conventional timbering. Openings
may not exceed thirty (30) feet in width.
(d) No changes shall be made in any roof bolting installation prior
to the issuance of a revised permit by the director.
(Formerly: Acts 1955, c.168, s.36.) As amended by P.L.231-1983,
SEC.11; P.L.243-1987, SEC.2.
Last modified: May 27, 2006