4 Va. Admin. Code § 25-40-880
Current through Register Vol. 41, No. 8, December 2, 2024
Section 4VAC25-40-880 - Ground vibration from blastingA. Ground vibration, measured as peak particle velocity resulting from blasting, shall not exceed the limits set forth in Figure 1 at any inhabited building not owned or leased by the operator, without approval of the director. A seismographic record shall be provided for each blast. Click here to view image
B. Seismic monitoring of each blast shall be conducted, unless the blast contains no more than 500 pounds of explosives and the scaled distance, Ds, is 90 feet or more, as calculated with the following scaled distance formulas: Click here to view image
Where:
W = Maximum charge weight of explosives in pounds per delay period of 8.0 milliseconds or more.
D = Distance in feet from the blast site to the nearest inhabited building not owned or leased by the mine operator.
4 Va. Admin. Code § 25-40-880
Derived from VR480-05-1.2 § 6.11, eff. July 19, 1989; amended, Virginia Register Volume 14, Issue 17, eff. July 1, 1998; Volume 25, Issue 20, eff. July 8, 2009; Amended, Virginia Register Volume 35, Issue 04, eff. 11/30/2018.Statutory Authority: §§ 45.1-161.3, 45.1-161.294, and 45.1-161.305 of the Code of Virginia.