Newmont has been granted a patent for a block cave mining method featuring a draw column height of at least 450 m. The design includes drawbells with a minimum height of 25 m, facilitating the flow of caved rocks from the caved volume to the extraction level. GlobalData’s report on Newmont gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Newmont, Extraction by leaching was a key innovation area identified from patents. Newmont's grant share as of June 2024 was 63%. Grant share is based on the ratio of number of grants to total number of patents.
Drawbell design for block cave mining operations
The granted patent US11994028B2 introduces a novel design for a drawbell utilized in block cave mining operations. This drawbell is characterized by a defined volume that connects a caved volume to an extraction level, facilitating the downward flow of caved rocks. Key features of the drawbell include a minimum height of 25 meters from the extraction level to its highest point, and a specific profile comprising three distinct sections: a throat section with parallel side walls, a tapered section that widens outward, and an undercut section with parallel side walls extending upward. The design also stipulates that the drawbell must have a void volume of at least 9,000 cubic meters, ensuring sufficient capacity for effective mining operations.
Further specifications detail the dimensions of the drawbell's sections, with the throat section required to be at least 10 meters high, the tapered section at least 16 meters, and the undercut section at least 7 meters. Additionally, the spacing between the side walls of the throat section must be a minimum of 14 meters, while the undercut section requires a spacing of at least 40 meters. The patent emphasizes the structural integrity and operational efficiency of the drawbell, which is designed to optimize the flow of materials during mining processes. This innovative design aims to enhance the effectiveness of block cave mining by improving the movement of caved rocks from the mining site to the extraction level.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
