A method for measuring cut-off grade ore residues in front of ore drawing
A measurement method and volume measurement technology, applied in measurement devices, ground mining, mining equipment, etc., can solve the problem that the volume of the permanent end residual body cannot be measured, and achieve the effect of direct inspection and verification
Active Publication Date: 2019-09-20
NANJING MEISHAN METALLURGY DEV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to provide a method for measuring the ore residual body on the front of the cut-off grade in order to solve the problem that the volume of the permanent end residual body cannot be measured in the ore loss, and to provide the most direct test for the optimization of reasonable ore falling parameters. with verification
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] The present invention will be further illustrated below in conjunction with specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0023] The method for measuring the ore residual body on the cut-off grade ore drawing front of the present invention controls the normal withdrawal approach 5 and measures the withdrawal advance distance of the connecting road 13 after the residual body model is formed according to the requirements; In the road 5, the ore is extracted according to the method of blasting with a step distance of 15 ore and full-section ore extraction, and the volume of the residual body 7 at the end can be directly measured after one-time loosening of the ore in the observation link 13.
[0024] The specific implementation steps are:
[0025] (1) Construction of measurement roadway model. When a plurality of...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for measuring front-surface residual ore bodies in cut-off grade ore drawing. The method of the invention comprises the following steps: (1) construction of a measurement roadway model; (2) formation of residual ore bodies; and (3) measurement of the volumes of the residual ore bodies, wherein the rectangular length (X) and width (Y) and the ore-drawing repose angle(beta) of strip residual ore bodies are measured by using a measuring tool, and since the distance between access roads is a known design parameter (B), the volumes of the residual ore bodies can bedirectly calculated according to the equation that V = X*Y*B, so the measurement of the volumes of the residual ore bodies is completed. The method provided by the invention can solve the problem thatthe volume of a permanent end residual body in ore loss cannot be measured in the prior art, and realizes the most direct inspection and verification of the optimization of reasonable ore breaking-down parameters.
Description
[0001] Technical field: [0002] The invention relates to a method for measuring the ore residual body on the front face of ore drawing at cut-off grade, and belongs to the technical field of ore drawing by the segmental caving method without bottom pillars. [0003] Background technique: [0004] Pillarless segmental caving method has been widely used in iron mines at home and abroad. The difference in ore caving parameters leads to different movement laws of caving ore rocks, different degrees of ore dilution, and different recovery rates. For the diamond-shaped blocks with staggered arrangement of upper and lower mining roadways, different cut-off grades lead to different ore losses. Ore losses mainly include ridge residues, wall residues, and end residues. Among them, the residual body at the ridge can be recovered by drawing ore in the lower layer; the residual body near the wall exists for a short time, and most of the residual body near the wall in the previous step of ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/22E21F17/00F42D3/04G01B21/00
Inventor 李正刚
Owner NANJING MEISHAN METALLURGY DEV