CODE OF VIRGINIA EXPLOSIVES AND BLASTING PRACTICES IN SHAFT AND SLOPE OPERATIONS (§ 45.1-161.132) A. Blasting areas in shaft or slope operations shall be covered with mats or materials when the excavations are too shallow to retain the blasted material. B. If explosives are in the shaft or slope when an electrical storm approaches, all miners shall be removed from such working places until the storm has passed. HISTORY: 1978, c. 729, § 45.1-53.1; 1994, c. 28.