The present invention concerns an explosive material charging device (1) and a method of positioning the explosive material charging device (1) in a borehole (3). The explosive material charging device (1) comprises a top anchor unit (5) and a bottom anchor unit (7) each configured to engage the borehole wall (8), an expandable tube member (11) arranged between the top anchor unit (5) and the bottom anchor unit (7) and configured to be charged with explosive material (40), the bottom anchor unit (7) comprises a backflow prevention valve device (13) configured to prevent the explosive material (40) to flow out from the expandable tube member (11), wherein the backflow prevention valve device (13) is openable for permitting a charging hose (15) to enter the expandable tube member (11) for reaching the interior of the top anchor unit (5),

The present invention concerns an explosive material charging device (1) and a method of positioning the explosive material charging device (1) in a borehole (3). The explosive material charging device (1) comprises a top anchor unit (5) and a bottom anchor unit (7) each configured to engage the borehole wall (8), an expandable tube member (11) arranged between the top anchor unit (5) and the bottom anchor unit (7) and configured to be charged with explosive material (40), the bottom anchor unit (7) comprises a backflow prevention valve device (13) configured to prevent the explosive material (40) to flow out from the expandable tube member (11), wherein the backflow prevention valve device (13) is openable for permitting a charging hose (15) to enter the expandable tube member (11) for reaching the interior of the top anchor unit (5),

A blast hole liner is provided having an outer sleeve and an elongate tubing located within the outer sleeve. The outer sleeve is provided with an open first end thereby forming an internal space, adapted to hold an explosive composition. The outer sleeve also has at least one compartment 5 formed in a second end. The elongate tubing is adapted to allow for the entry of compressed air to inflate the elongate tubing and thereby ensure straightening or untwisting of the outer sleeve.

A blast hole liner is provided having an outer sleeve and an elongate tubing located within the outer sleeve. The outer sleeve is provided with an open first end thereby forming an internal space, adapted to hold an explosive composition. The outer sleeve also has at least one compartment 5 formed in a second end. The elongate tubing is adapted to allow for the entry of compressed air to inflate the elongate tubing and thereby ensure straightening or untwisting of the outer sleeve.

A booster assembly (60) for use in a drill and blast operation comprises in co-axial alignment: (a) a booster (65) for initiating an explosion of an explosives material in a hole (90) in a pit floor (91) as part of a drill and blast operation, (b) a spool (63) and a detonation cord (66) wrapped around the spool in a storage position outside the hole and connected to the spool and to the booster, and (b) a stake (61). The spool allows the detonation cord to be unwound from the spool as the booster is moved from the storage position to an operative depth in the hole and the spool remains in the storage position. The stake is provided for locating the spool in the pit floor proximate the hole after the booster is at the operative depth in the hole.

A booster assembly (60) for use in a drill and blast operation comprises in co-axial alignment: (a) a booster (65) for initiating an explosion of an explosives material in a hole (90) in a pit floor (91) as part of a drill and blast operation, (b) a spool (63) and a detonation cord (66) wrapped around the spool in a storage position outside the hole and connected to the spool and to the booster, and (b) a stake (61). The spool allows the detonation cord to be unwound from the spool as the booster is moved from the storage position to an operative depth in the hole and the spool remains in the storage position. The stake is provided for locating the spool in the pit floor proximate the hole after the booster is at the operative depth in the hole.

An explosives delivery vehicle for delivering a booster (65) for initiating an explosion of an explosive material in a hole (90) in a floor (91) of a mine pit to an operative depth in the hole. The vehicle comprises a storage assembly (10) for storing a plurality of the boosters, a booster loading assembly (30) for (i) supporting the booster in a delivery position above the hole and (ii) moving the booster downwardly into the hole and inserting the booster at an operative depth in the hole; and a delivery assembly (20) for transporting the booster from the storage assembly to the loading assembly.

An explosives delivery vehicle for delivering a booster (65) for initiating an explosion of an explosive material in a hole (90) in a floor (91) of a mine pit to an operative depth in the hole. The vehicle comprises a storage assembly (10) for storing a plurality of the boosters, a booster loading assembly (30) for (i) supporting the booster in a delivery position above the hole and (ii) moving the booster downwardly into the hole and inserting the booster at an operative depth in the hole; and a delivery assembly (20) for transporting the booster from the storage assembly to the loading assembly.

The present disclosure provides a loading tube to be used in a perforating gun. The loading tube is capable of securely engaging with shaped charges while maintaining the structural integrity and being made by injection molding.

The present disclosure provides a loading tube to be used in a perforating gun. The loading tube is capable of securely engaging with shaped charges while maintaining the structural integrity and being made by injection molding.