CN110984990A - Sill-pillar-free sublevel caving longitudinal drift slot-drawing mining method - Google Patents

Sill-pillar-free sublevel caving longitudinal drift slot-drawing mining method Download PDF

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Publication number
CN110984990A
CN110984990A CN201911332389.9A CN201911332389A CN110984990A CN 110984990 A CN110984990 A CN 110984990A CN 201911332389 A CN201911332389 A CN 201911332389A CN 110984990 A CN110984990 A CN 110984990A
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CN
China
Prior art keywords
cutting
lane
drift
mining
free
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911332389.9A
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Chinese (zh)
Inventor
张作富
关翔
杨益强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baosteel Group Xinjiang Bayi Iron and Steel Co Ltd
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Baosteel Group Xinjiang Bayi Iron and Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baosteel Group Xinjiang Bayi Iron and Steel Co Ltd filed Critical Baosteel Group Xinjiang Bayi Iron and Steel Co Ltd
Priority to CN201911332389.9A priority Critical patent/CN110984990A/en
Publication of CN110984990A publication Critical patent/CN110984990A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/22Methods of underground mining; Layouts therefor for ores, e.g. mining placers

Abstract

The invention discloses a sill pillar-free sublevel caving longitudinal drift slot-drawing mining method, which comprises the steps of directly tunneling a cutting raise in a mining drift, drilling and expanding well rows by using a rock drilling trolley on two sides of the cutting raise along the drift direction until the ore body boundary stops, forming a drift cutting lane at the moment, drilling a plurality of rows of fan-shaped blast holes with different angles by using the rock drilling trolley in a drift connecting lane according to the geological mine boundary, blasting the drift cutting lane in a grading manner by taking the drift cutting lane as a free surface, and recovering part of ore after blasting, so that a huge compensation space and a free surface can be formed on the part above the drift connecting lane, and conditions are created for the subsequent medium-length hole blasting.

Description

Sill-pillar-free sublevel caving longitudinal drift slot-drawing mining method
Technical Field
The invention relates to a sill pillar-free sublevel caving longitudinal drift slot-drawing mining method.
Background
The sublevel caving mining method without sill pillar is a high-efficiency mining method with high mechanization degree and small labor consumption. The most widely used cutting methods are: a combined slot-drawing method for cutting roadway and cutting raise includes such steps as digging cutting roadway along the boundary of ore body at the end of stoping route, and digging one or more cutting raises at proper position according to the length of cutting roadway and the requirement of blasting. And (3) drilling parallel or fan-shaped holes upwards in the cutting roadway, and backing up and blasting row by taking the cutting raise as a free surface to form a cutting groove. The method has the disadvantages that firstly, when the rock drilling blasting quality is poor, a suspended roof is easy to form, and therefore, the width of the pull groove needs to be properly increased, and blast holes need to be encrypted, so that the construction cost is increased; secondly, when the boundary of the ore body hanging wall is irregular, the dilution rate of the extracted ore can be increased when the cutting roadway is arranged close to the edge of the ore body hanging wall, the ore mining and processing cost is improved, the ore loss rate can be increased when the cutting roadway is arranged far away from the edge of the ore body hanging wall, and the dilution and the loss of the ore by the groove-drawing method can not be considered at the same time.
Disclosure of Invention
The invention aims to provide a sill pillar-free sublevel caving longitudinal drift slot-drawing mining method which is simple in process, large in flexibility and strong in adaptability, and a return roadway can independently form a cutting slot at a reasonable position. Especially when the boundary of the ore body changes greatly, the ore loss rate and the depletion rate can be considered.
The invention aims to realize the method, a cut raise is directly tunneled in a mining route, drilling and well-expanding rows are drilled on two sides of the cut raise along the route direction by using a rock drilling trolley until the ore body boundary stops, a route cutting lane is formed at the moment, a plurality of rows of fan-shaped blast holes with different angles are drilled in a draw shaft lane according to the geological mine boundary, the route cutting lane is used for blasting in times by taking the route cutting lane as a free surface, and partial ore is recovered after blasting, so that a huge compensation space and a free surface can be formed at the part above the draw shaft lane, and conditions are created for the subsequent medium-length hole blasting.
Through long-time on-site observation and statistics, according to the aspect of only considering the dilution rate, the dilution rate is reduced by about 0.6 percent, the grade of the iron ore is improved, 1.48 ten thousand tons of iron concentrate can be produced, the yield of the iron concentrate is 100 yuan/ton, and the benefit is increased by 148.2 ten thousand yuan. In addition, the cutting roadway excavation amount can be reduced by 350m, the excavation cost per meter is 6657.11 yuan, and the cost is reduced by 233.01 ten thousand yuan. Therefore, the total economic benefit is about 381.21 ten thousand yuan. The invention has simple process, large flexibility and strong adaptability, and the return roadway can independently form the cutting groove at a reasonable position. Especially when the boundary of the ore body changes greatly, the ore loss rate and the depletion rate can be considered. The method is suitable for mines with complicated ore body changes by adopting a sill pillar-free sublevel caving mining method.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic view of a mining arrangement for the method of the present invention.
Detailed Description
A sill pillar-free sublevel caving longitudinal drift slot-drawing mining method, as shown in figure 1, wherein the serial numbers 1, 4 and 7 are the transport directions of a scraper. The method comprises the steps of directly tunneling a cutting raise 2 in a mining route, drilling and expanding rows on two sides of the cutting raise 2 by using a rock drilling trolley along the route direction until the boundary of an ore body stops, forming a route cutting lane 5 at the moment, drilling a plurality of rows of fan-shaped blast holes 6 with different angles by using the rock drilling trolley according to a geological mine 3 in a draw shaft connecting lane, blasting the route cutting lane 5 as a free surface in a grading mode, and mining partial ore after blasting, so that a huge compensation space and a free surface can be formed on the part above the draw shaft connecting lane, and conditions are created for subsequent medium-length hole blasting.

Claims (1)

1. A sill pillar-free sublevel caving longitudinal drift slot-drawing mining method is characterized in that: the method comprises the steps of directly tunneling a cutting raise in a mining route, drilling and expanding rows on two sides of the cutting raise along the route direction by using a drilling trolley until the boundary of an ore body stops, forming a route cutting lane at the moment, drilling a plurality of rows of fan-shaped blast holes with different angles by using the drilling trolley according to the geological mine in a draw shaft connecting lane, blasting in a grading mode by using the route cutting lane as a free surface, and stoping partial ores after blasting, so that a huge compensation space and a free surface can be formed at the part above the draw shaft connecting lane, and conditions are created for subsequent medium-length hole blasting.
CN201911332389.9A 2019-12-22 2019-12-22 Sill-pillar-free sublevel caving longitudinal drift slot-drawing mining method Pending CN110984990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911332389.9A CN110984990A (en) 2019-12-22 2019-12-22 Sill-pillar-free sublevel caving longitudinal drift slot-drawing mining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911332389.9A CN110984990A (en) 2019-12-22 2019-12-22 Sill-pillar-free sublevel caving longitudinal drift slot-drawing mining method

Publications (1)

Publication Number Publication Date
CN110984990A true CN110984990A (en) 2020-04-10

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338674B (en) * 2008-08-14 2011-06-29 武汉理工大学 Non-pillar sublevel caving mining method for direct loading for ore
CN103306679A (en) * 2013-05-21 2013-09-18 马钢(集团)控股有限公司 '|'-shaped free surface holing one-step well completion technology
CN103590831A (en) * 2013-11-22 2014-02-19 北京科技大学 Novel mining method of gently-inclined thin and medium thickness ore bodies
CN104453901A (en) * 2014-12-08 2015-03-25 广西大学 Sublevel open-stoping mining method with subsequent backfilling for long-hole caving in thin ore bodies
CN106321104A (en) * 2016-08-31 2017-01-11 安徽开发矿业有限公司 Loss-free dilution-free cut slot stoping technology
CN108661649A (en) * 2018-06-07 2018-10-16 大冶有色金属有限责任公司 A kind of inclined access formula non-pillar sublevel caving mining methods

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101338674B (en) * 2008-08-14 2011-06-29 武汉理工大学 Non-pillar sublevel caving mining method for direct loading for ore
CN103306679A (en) * 2013-05-21 2013-09-18 马钢(集团)控股有限公司 '|'-shaped free surface holing one-step well completion technology
CN103590831A (en) * 2013-11-22 2014-02-19 北京科技大学 Novel mining method of gently-inclined thin and medium thickness ore bodies
CN104453901A (en) * 2014-12-08 2015-03-25 广西大学 Sublevel open-stoping mining method with subsequent backfilling for long-hole caving in thin ore bodies
CN106321104A (en) * 2016-08-31 2017-01-11 安徽开发矿业有限公司 Loss-free dilution-free cut slot stoping technology
CN108661649A (en) * 2018-06-07 2018-10-16 大冶有色金属有限责任公司 A kind of inclined access formula non-pillar sublevel caving mining methods

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