A method for recovering residual ore by forward deep hole blasting and caving

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Through three-dimensional laser scanning and filling grouting technology, the problem of blasting difficulties in collapsed areas is solved, stability and efficiency are improved, and the blasting range and shock wave are controlled.

CN119754771APending Publication Date: 2025-04-04GUIZHOU LUFA IND CO LTD

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Patent Information

Application Number: CN202411952433.7
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-12-27
Publication Date: 2025-04-04

Application Information

Patent Timeline

27 Dec 2024

Application

CN202411952433.7

04 Apr 2025

Publication

CN119754771A

IPC: E21C41/22; F42D1/00; F42D1/08; F42D1/18; F42D3/04; E21F15/00; E21F17/18; E21D11/10

CPC: Y02P10/20

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Application Domain

Mining devices Underground chambers

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AI Technical Summary

Technical Problem

When recycling residual mines in the collapsed area, the degree of rock collapse is different, and it is difficult to control blasting in the subsequent situation.

Method used

Point cloud data of ore body and empty area is obtained through a three-dimensional laser scanner, a three-dimensional model is constructed, collapse and crack areas are divided, filling and grouting are performed, and finally recycling is carried out by large blasting and top release of forward deep holes.

Benefits of technology

Fill and grout to reinforce the ore structure, improve blasting stability and crushing effect, reduce secondary blasting demand, and control blasting range and shock waves.

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Abstract

The present invention belongs to the technical field of mining, and specifically relates to a method for recovering residual ore by forward deep hole large-scale blasting and caving, and the method comprises the following steps: S1: removal, the subsidence area at the edge of the ore body is removed; S2: spatial detection, the point cloud data of the ore body to be recovered and the empty area above the ore body to be recovered are obtained by a three-dimensional laser scanner, and a three-dimensional model of the ore body to be recovered is constructed; S3: segmentation of the point cloud data, the ore body with collapse and cracks is cut in the point cloud data, and the volume of the internal subsidence area and the crack area is calculated and the models are generated respectively, and the corresponding volumes are calculated according to the models; S4: filling and grouting, the crack area is filled, and the crack area and the internal subsidence area after filling are grouted; S5: blasting. By filling and grouting the crack area and grouting the subsidence area, the voids in the ore body can be filled, the weak links can be reinforced, the overall structural strength of the ore body can be significantly improved, and the blasting stability can be improved.

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