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Deep hole arranging method in mining

An arrangement method and deep hole technology, which can be used in surface mining, underground mining, special mining, etc., can solve the problems of uneven ore particle size distribution, unfavorable ore flow, less blast hole collapse, etc., and improve the composition of particle size distribution. The effect of improving the flow of ore and rock, improving the conditions of entry and exit, and reducing the number of blast holes

Inactive Publication Date: 2010-06-16
宝钢集团上海梅山有限公司
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  • 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

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Examples

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Embodiment 1

[0025] Example 1: In a large-scale underground production mine, the ore body is concentrated and thick, with a strike length of 1370m, a width of 824m, and an average thickness of 134m. It adopts the joint development of shafts and slopes, and the mining method of segmental caving without pillars. The structural parameters of the stope It is 15m×15m, and the access section is 5.0m×3.8m. The mining medium and deep hole parameters are: the diameter of the blast hole is 78mm, the row spacing is 1.6m, and the hole bottom distance is 2.0-2.5m. Use SimbaH1354 full hydraulic rock drilling rig with cop1838 rock drill for mining medium and deep hole operations. The big arm of the rock drilling rig has the function of moving left and right. The rock drill is fixed on the propulsion beam, and the propulsion beam rotates around the rotary axis to adjust the blast hole. construction angle. The traditional method is: determine the center line of the roadway according to the cross-sectional ...

Embodiment 2

[0026] Example 2: The northern ore body of Meishan Iron Mine is a branch of the main ore body. The ore body elevation is -89m. The mining method of ramp development and segmental caving without pillars is adopted. The stope structure parameter is 12m× 10m, the approach section is 4.2m×3.2m, and the mining medium and deep hole parameters are: the blast hole diameter 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 equipped with YG90 rock drilling machine for mining medium and deep hole operations. There are upper and lower rotary shafts (namely: main rotary shaft and secondary rotary shaft) on the big arm of the rock drilling rig, and the push beam Fixed on the upper secondary rotary shaft, the upper and lower rotary shafts can adjust the construction angle of the blast hole. The traditional method is: determine the center line of the roadway according to the cross-sectional diagram of the mining approach, a...

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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 of 2-3 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] Pillarless segmental caving method is a mining method with simple structure, convenient management, safety and high efficiency. It has been 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 segmentation and large spacing appeared one after another. The main technical parameters of the non-pillar segmental caving method include segmental height, approach distance, ore-caving step distance, etc. Its mining characteristics are: for mines that are constructed and mined in stages, in order to carry out excavation and excavation in a normal and orderly manner, Mining rock drilling, back mining blasting and mining and other work. ...

Claims

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Application Information

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IPC IPC(8): E21C41/16E21C27/22F42D3/00
Inventor 范庆霞
Owner 宝钢集团上海梅山有限公司
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