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Advanced support system and method for working-face

A technology of mining face and advance support, which is applied in mining equipment, earthwork drilling, bolt installation, etc., can solve problems affecting the safe and efficient production of the working face, roof sinking roof accidents, roof integrity damage, etc., to achieve Improve the strength of advanced support, improve production efficiency, and facilitate construction

Inactive Publication Date: 2019-03-19
XINWEN MINING GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at present, single hydraulic props and hydraulic supports are used as the advanced support system of the mining face. Although they have the advantages of wide adaptability, high support strength, and safety and reliability, there are still many personnel occupied and high construction intensity that affect the working face. Safe and efficient production issues
[0006] At present, single hydraulic props, advanced supports, etc. are used to repeatedly support the roof, which intensifies the damage to the integrity of the roof, causing the roof to sink and even roof accidents, which are prone to safety hazards

Method used

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  • Advanced support system and method for working-face
  • Advanced support system and method for working-face

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 with 2 As shown, the present embodiment provides an advance support system for mining face, including an advance reinforcement support system; the advance reinforcement support system includes two rows of grouting anchor cables 1 arranged on the roof 4 along the roadway extension direction and two rows of grouting anchor cable trusses 2; two adjacent grouting anchor cables 1 along the roadway extension direction are connected through the grouting anchor cable trusses 2. The grouting anchor cable truss 2 is an I-beam with two perforations; the two perforations of the grouting anchor cable truss 2 respectively pass through two adjacent grouting anchor cables 1 in the direction of roadway extension and are fixed on the On the top plate 4 ; two rows of grouted anchor cable trusses 2 are arranged on the top plate 4 in a three-flower pattern. Among them, the first row of grouting anchor cable trusses 2 is 60.4m away from the side of the roadway, the second ...

Embodiment 2

[0034] The difference between this embodiment and Embodiment 1 is that: the advanced support system of the mining face also includes a mine pressure observation system; the mine pressure observation system includes an online mine pressure observation system, mine pressure manual observation points, roof layer instrument; the mine pressure on-line observation system includes a borehole stress gauge, a roof displacement sensor, and an anchor cable stress gauge:

[0035] (1) Drilling stress gauge

[0036] A borehole stress gauge is arranged every 25m on the side of the roadway 6, the type is digital, and the change data is automatically transmitted, which can be analyzed on the ground, and the observation frequency is real-time observation.

[0037] (2) Anchor cable stress gauge

[0038] Install 2 anchor cable stress gauges at intervals of 25m to monitor the pressure on the roof 4, and set early warning values ​​for real-time early warning, and take emergency measures immediatel...

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Abstract

The invention discloses an advanced support system and method for a working-face, and belongs to the technical field of coal mining. The technical scheme comprises the advanced support system for theworking-face, which comprises an advanced reinforcing and supporting system; wherein the advanced reinforcing and supporting system comprises two rows of grouting anchor cables and two rows of grouting anchor cable trusses, wherein the two rows of grouting anchor cables and the two rows of grouting anchor cable trusses arranged on a top plate along the extension direction of a roadway; and a plurality of adjacent grouting anchor cables along the extension direction of the roadway are connected through the grouting anchor cable truss. The invention relates to the advanced support method for working-face, wherein two rows of grouting anchor cables and two rows of grouting anchor cable trusses are arranged on a top plate along the extension direction of the roadway, and a plurality of adjacent grouting anchor cables along the extension direction of the roadway are connected through the grouting anchor cable trusses. Compared with the traditional advanced support system and method for theworking-face, the advanced supporting system and method for the working-face provided by the invention has the advantages that the advanced support strength is greatly improved, the production efficiency can be improved, the manufacturing cost is low, and the construction is convenient with good economic benefit.

Description

technical field [0001] The invention relates to the technical field of coal mine mining, in particular to an advanced support system and method for a mining working face. Background technique [0002] The support in the coal mining process of underground mining is generally divided into two stages, the first stage is the permanent support in the excavation stage, and the second stage is the advanced support in the recovery stage. [0003] In the traditional support method, the support in the first stage is to ensure the safety of the roadway space and prevent safety accidents from collapsing. Usually, one or a combination of support methods such as ordinary anchor cables, anchor rods, and sheds are used. [0004] In the second stage, the advanced support of the coal mining face and the lower channel in underground mining is a special support adopted to ensure the smooth flow of the working face and the lower exit. Before the roof collapses, the pressure on the mining face i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00E21D20/02
CPCE21D20/02E21D21/00
Inventor 张建辛恒奇周明莫技冀贞文
Owner XINWEN MINING GROUP