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Stoping blast mining process for thick and large ore body

A thick and large ore body and process technology, applied in blasting, surface mining, underground mining, etc., can solve the problems of high dilution rate of end mining, difficult recovery of boundary ore, and low mining efficiency, so as to improve the efficiency of each row of deep holes. The effect of blasting the amount of ore, reducing production costs, and low mining costs

Inactive Publication Date: 2018-11-16
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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Problems solved by technology

[0002] The traditional mining technology of thick and large ore bodies adopts vertically arranged rock drilling roadways for mining blasting. This mining blasting process has high production costs and low mining efficiency, and because the boundary of ore rocks varies greatly up and down, considering the overall layout of the mine house, some boundaries The ore is difficult to recover, which will cause the problem of high dilution rate of end mining

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  • Stoping blast mining process for thick and large ore body
  • Stoping blast mining process for thick and large ore body

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Embodiment

[0024] The back mining blasting mining technology of the thick ore body. The ore body of the thick copper mine is about 500m long, 25m wide, and 360m high. It is divided into multiple ore blocks, and each block is 36m long, 25m wide, The height is 60m, and the mining process specifically includes the following steps:

[0025] Step (1): Construction of cutting lane and cutting shaft: divide the main ore body into ore blocks in sequence according to the ore block structure, and construct cutting lane 2 at the end of the ore block. Cutting lane 2 is perpendicular to the direction of the ore body, and the cutting lane adopts a smooth surface Blasting is carried out by blasting, slag is discharged by electric scraper, cutting well 3 is vertically arranged at the bottom of the cutting lane, and the cutting well is constructed by raise drilling rig;

[0026] Step (2) Double rock drilling roadway construction: Arrange upper and lower layer rock drilling roadways on each ore block alon...

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Abstract

The invention provides a stoping blast mining process for a thick and large ore body. Rock drilling roadways of upper and lower layers are arranged in the thick and large ore body in the direction ofthe ore body, and double rows of rock drilling roadways are arranged at each layer. Upward vertical fan-shaped recovery medium-depth holes are formed in each rock drilling roadway, the medium-depth holes of every two rows are subjected to simultaneous line-connection blasting, and in the blasting recovery process, the step-shaped retreat mining from top to bottom is adopted. An original method that a thick and large ore body is subjected to stoping by adopting vertically-arranged rock drilling roadways is changed to the method that the thick and large ore body of a copper mine is subjected tostoping by double rock drilling roadways in the ore body direction, so that the construction amount of mining preparation roadways and deep holes is effectively reduced, the production cost of the copper mine is reduced, and the mining efficiency is high.

Description

technical field [0001] The invention belongs to the field of ore body mining, and in particular relates to a mining blasting mining process for thick and large ore bodies. Background technique [0002] The traditional mining technology of thick and large ore bodies adopts vertically arranged rock drilling roadways for mining blasting. This mining blasting process has high production costs and low mining efficiency, and because the boundary of ore rocks varies greatly up and down, considering the overall layout of the mine house, some boundaries The ore is difficult to recover, which will cause the problem of high dilution rate of end mining. The mining blasting is carried out by arranging the rock drilling roadway in the vertical direction. This mining blasting process requires a large amount of deep hole construction and a low amount of blasting along the length of the meter. Contents of the invention [0003] In order to solve the above-mentioned problems existing in th...

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Application Information

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IPC IPC(8): E21C41/22F42D3/04
CPCE21C41/22F42D3/04
Inventor 田宏海陈大佼王东华
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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