Aug 12, 2025

US12385729 - Systems for loading explosives into blast holes

Approaches to loading explosives into blast holes to provide increased explosive density can involve loading the hole with a detonable charge in which energetic material is arranged into zones of differing densities. Related systems and methods may provide for parallel independent streams of energetic material having differing densities and delivering the differentiated streams into a bore hole so as to create an explosive charge therein having a particular geometric arrangement of material from the respective streams.

Assignee: Dyno Nobel Inc.
Inventors: David Scott Jensen, David Lynn Gordon
Filing date: 2023-06-27

The patent describes a system for loading explosives into bore holes that enhances explosive density by using a conduit to deliver two independent streams of energetic material with differing densities. This system allows for precise control over the geometric arrangement of the explosive charge, utilizing a core flow path surrounded by an annular flow path to create a tailored explosive configuration.

Claim 1

A system for loading a geometric configuration of energetic material into a bore hole, comprising: a source of an energetic material; a conduit fluidically connected to the source and configured to convey at least two independent parallel streams of energetic material from the source, said conduit comprising: a core flow path; and an annular flow path, wherein the core flow path is smaller in diameter than the annular flow path and is situated within the annular flow path, and wherein the conduit is configured for insertion into a bore hole and for ejecting the streams of energetic material into the bore hole to form therein an explosive charge comprising a core formed by material from the core flow path at least partially surrounded by an annulus formed by material from the annular flow path; and a flow rate control mechanism for varying a flow rate of energetic material in at least one of the core flow path and the annular flow path. a source of an energetic material; a conduit fluidically connected to the source and configured to convey at least two independent parallel streams of energetic material from the source, said conduit comprising: a core flow path; and an annular flow path, wherein the core flow path is smaller in diameter than the annular flow path and is situated within the annular flow path, and wherein the conduit is configured for insertion into a bore hole and for ejecting the streams of energetic material into the bore hole to form therein an explosive charge comprising a core formed by material from the core flow path at least partially surrounded by an annulus formed by material from the annular flow path; and a core flow path; and an annular flow path, wherein the core flow path is smaller in diameter than the annular flow path and is situated within the annular flow path, and wherein the conduit is configured for insertion into a bore hole and for ejecting the streams of energetic material into the bore hole to form therein an explosive charge comprising a core formed by material from the core flow path at least partially surrounded by an annulus formed by material from the annular flow path; and a flow rate control mechanism for varying a flow rate of energetic material in at least one of the core flow path and the annular flow path.

Google Patents

https://patents.google.com/patent/US12385729

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12385729