Unlock instant, AI-driven research and patent intelligence for your innovation.

Deep hole arranging method in mining

A layout method and deep hole technology, applied in surface mining, underground mining, special mining, etc., can solve problems such as uneven ore particle size distribution, unfavorable ore rock flow, and less ore collapse in blastholes, and improve the composition of particle size distribution. And the flow of ore rocks, improve the conditions of entry and exit, and improve the efficiency of ore extraction

Inactive Publication Date: 2012-10-24
宝钢集团上海梅山有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following problems exist in the arrangement of single-center fan-shaped blastholes: (1) The density of blastholes in the depth direction is quite different, that is, the holes are dense and the bottom of the hole is sparse; The number of blast holes is large, and the amount of ore collapse per unit length of the blast hole is small; (3) The particle size distribution of the ore is uneven during the blasting process, and there is over-crushing at the hole, and the output rate of large pieces at the bottom of the hole is high; (4) The size of the ore opening is small when the ore is discharged in the access road, which is not conducive to the flow of ore rocks
The following problems exist in the arrangement of multi-center silo-type blastholes: (1) the section size of the roadway is required to be large, and the amount of excavation engineering and excavation costs are relatively high; (2) the exposed area of ​​the roof of the roadway is large, which is prone to safety hazards such as roof fall. The maintenance cost of the roadway is high; (3) The silo-type ore-drawing principle is adopted for the ore discharge in the access road, which is completely different from the ellipsoid ore-drawing principle of the segmental caving method without bottom pillars; (4) In view of the above problems, domestic and foreign There are few mines that use the silo drawing principle to construct parallel blastholes

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Deep hole arranging method in mining
  • Deep hole arranging method in mining
  • Deep hole arranging method in mining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: In a large underground production mine, the ore body is concentrated and thick, with a strike length of 1370 m, a width of 824 m, and an average thickness of 134 m. The joint development of shafts and slopes is adopted, and the mining method of subsection caving without bottom pillars is adopted. The structural parameters of the stope It is 15m × 15m, the access section is 5.0m × 3.8m, and the parameters of the deep hole in the mining are: the diameter of the blast hole is φ78mm, the row spacing is 1.6m, and the hole bottom distance is 2.0-2.5m. The SimbaH1354 full hydraulic rock drilling rig is used with cop1838 rock drill for mining medium and deep hole operations. The boom of the rock drilling rig has the function of left and right translation. The rock drill is fixed on the propelling beam, and the propelling beam rotates left and right around the rotary axis to adjust the blasthole. construction angle. The traditional method is to determine the center li...

Embodiment 2

[0026] Example 2: The northern ore body of Meishan Iron Mine is a branch of the main ore body. The ore-seeing elevation of the ore body is -89m. The mining method of slope road development and subsection caving without bottom pillar is adopted, and the stope structure parameter is 12m× 10m, the access section is 4.2m×3.2m, and the parameters of the deep hole in mining are: the diameter of the blast hole is φ60mm, the row spacing is 1.8m, and the hole bottom distance is 1.6-2.0m. The CTC-141 pneumatic rock drilling rig is used with YG90 rock drill for mining medium and deep hole operations. On the boom of the rock drilling rig, there are upper and lower rotary axes (ie: main rotary axis and secondary rotary axis), and the propelling beam It is fixed on the secondary rotary shaft on the upper part, and the construction angle of the blast hole can be adjusted by the upper and lower rotary shafts. The traditional method is to determine the center line of the roadway according to t...

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

No PUM Login to View More

Abstract

The invention relates to a deep hole arranging method in mining, which comprises the following steps of: arranging deep holes in mining in a sectional plan stoping route according to certain row-to-row distances and hole concentration coefficients, and carrying out deep hole construction in mining by adopting an air operated or hydraulic drill jambo, wherein the deep hole arrangement in mining of2-3 rock drilling centers is adopted according to the working mechanism and the working parameter of rock drilling equipment, and at least one hole in adjacent holes is not perpendicular to a horizontal surface when fan-shaped holes are arranged according to the 2-3 rock drilling centers. The invention enables the concentration degrees of the holes on the depth direction to differ slightly, i.e. the densities of the holes at hole mouths and hole bottoms differ a little. Under the condition of a certain ore caving range, the deep hole arranging method is beneficial to reducing the quantity of the holes and saving the rock drilling and blasting cost in mining, thereby improving the ore caving quantity of the holes in unit length.

Description

【Technical field】 [0001] The invention relates to the technical field of underground mining, in particular to a method for arranging deep holes in mining. 【Background technique】 [0002] The sub-pillar-free caving method is a mining method with simple structure, convenient management, safety and efficiency, and is widely used in underground mines at home and abroad. At present, this mining method is developing in the direction of large structural parameters and large mining equipment. And the stope structure parameters with high segment and large spacing appeared one after another. The main technical parameters of the sub-pillar-free sub-caving method are sub-section height, approach distance, and caving step distance. Mining rock drilling, mining blasting and mining work. The production level is divided into several subsections on the stage height, and each subsection is divided into several ore blocks, and the mining routes in the upper and lower subsections are arranged...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/16E21C27/22F42D3/00
Inventor 范庆霞
Owner 宝钢集团上海梅山有限公司