Method for reinforcing drop shaft in underground mine producing area

A technology of chute and mining area, which is applied in the field of reinforcement of chute in underground mine mining area, can solve the problems of short service life, low impact resistance, low support strength, etc., and achieve good wear resistance, good elasticity and light weight Effect

Inactive Publication Date: 2011-10-26
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

But at the same time, this method has the disadvantages of low support strength, low impact resistance, and short service life.

Method used

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  • Method for reinforcing drop shaft in underground mine producing area
  • Method for reinforcing drop shaft in underground mine producing area
  • Method for reinforcing drop shaft in underground mine producing area

Examples

Experimental program
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Embodiment 1

[0032] Implementation 1: Reinforcement of the 70-meter-deep underground mining area chute

[0033] Firstly, the first impact damage area is within 10m under the ore unloading. The impact damage in this area is mainly affected by the impact of normal loads, and the reinforcement method of rubber plates is adopted; the first lining plate 15 is fixed on the concrete through the first anchor claw 13 On the well wall 11, the first steel bar 14 is arranged between the first anchor claws 13 for reinforcement, and then the rubber liner with a size of 600mm×400mm and a thickness of 40mm is fixed on the first liner 15 by bolts. An impact zone is reinforced (e.g. figure 2 shown);

[0034] Secondly, the range of 25m to 40m below the ore discharge port is the second impact damage. The impact damage in this area is mainly affected by the tangential impact load. The specific parameters of the reinforcement method using high manganese steel plates are as follows:

[0035] First, the second...

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Abstract

The invention relates to a method for reinforcing a drop shaft in an underground mine producing area and belongs to the field of metal mine and rock engineering reinforcement. The method is characterized in that the movement track of ores in the drop shaft during the ore discharge process is fully considered, model experiments and theoretical analysis method are adopted for determining the property of impact action and an impact failure region to the well wall generated by the ores according to the height of the drop shaft and the diameter of the drop shaft, the drop shaft is hereby divided into four stress regions, namely a first impact failure region, a second impact failure region, a fault fracture zone region and a wear-out failure region, and different forms are further adopted for reinforcement. The method is especially applicable to reinforcement of the drop shafts in the producing areas under soft and broken surrounding rock conditions, can be used for significantly prolonging the service life of the drop shaft and has the advantages of safety in construction, simpleness and low cost.

Description

technical field [0001] The invention belongs to the fields of metal mine mining and geotechnical engineering reinforcement, and relates to a method for reinforcing a chute in an underground mine mining area, which is suitable for strengthening the chute in the mining area under the condition of soft and broken surrounding rocks, and prolongs the service life of the chute. Background technique [0002] The shaft in the mining area belongs to the mine development system engineering, and its main function is to slide and temporarily store ore. For general mines, the average service life of each shaft reaches 8 to 10 years, and the average burden of ore is 400,000 to 600,000 tons. The deformation and failure of shaft engineering has always been a major technical problem affecting mining production and safety. The difficulties are as follows: (1) The fault fracture zone in the ore body is extremely developed, the ore body is soft and broken, and the overall strength is low; (2) W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D5/11E21D5/12E21D20/02
Inventor 宋卫东杜翠凤杜建华王洪永
Owner UNIV OF SCI & TECH BEIJING
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