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Gob-side retaining entry beforehand wall-caving roof-reinforcing method

A technology of gob entry retention and roof, which is applied in the direction of earthwork drilling, mining equipment, pillars/brackets, etc. It can solve the problems of adverse effects on the stability of gob entry retention, unreasonable support methods, and long suspension time of the roof, etc. Achieve the effect of maintaining the stability of the roadway, avoiding untimely construction, and enhancing the integrity

Inactive Publication Date: 2013-06-05
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the support is not timely, the support method is unreasonable, or the time for the roof to be suspended after active support is too long, it will have an adverse effect on the stability of the gob-side entry retention

Method used

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  • Gob-side retaining entry beforehand wall-caving roof-reinforcing method

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Experimental program
Comparison scheme
Effect test

Embodiment

[0024] 1. Model of support material

[0025] Anchor: High-strength anchor rod, the pallet is an I-beam pallet with a length of 800mm.

[0026] Anchor mesh: 2000×1600mm diamond-shaped metal mesh.

[0027] Anchor cable: Φ17.8mm×6500mm anchor cable.

[0028] Steel belt: Ordinary W steel belt for mining.

[0029] 2. Support parameters

[0030] The row spacing between the anchor rods is 0.8m, and they are driven straight up; the anchor cables are driven every 2.4m along the direction of the roadway, and the distance from the side wall of the gob-side roadway is 0.8m, and they are driven straight up.

[0031] 3. Construction process

[0032] Blasting coal is used to open the side, and floating coal is handled manually. Blasting shall be carried out in strict accordance with the requirements of the regulations. After the blasting, the floating coal shall be loaded into the conveyor or transported away on the belt in time. Arrange single hydraulic props at the opening position...

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PUM

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Abstract

The invention discloses a gob-side retaining entry beforehand wall-caving roof-reinforcing method. Wall caving is performed at a position in need of entry-side support in front of a working face beforehand, the roof above a position where coal is mined is reinforced, and an anchor rod and W steel band combined support or an anchor rod, anchor mesh, anchor cable and W steel band combined support roof reinforcing mode is utilized. According to the gob-side retaining entry beforehand wall-caving roof-reinforcing method, the completeness of immediate roofs of gob-side retaining entries can be guaranteed, the self-bearing capacity is enhanced, bedding separation between immediate roofs and main roofs is prevented, the combination of in-entry support and entry-side support is close, and the support system function is fully developed.

Description

technical field [0001] The invention relates to a support method applied in underground coal mines to maintain the stability of gob-side entry retention, and in particular to a method for opening sides and fixing roofs of gob-side entry retention in advance. Background technique [0002] Gobside retaining entry without coal pillar mining has the advantages of alleviating the tension of excavation replacement, low roadway excavation rate and high recovery rate of coal resources. However, in order to adopt the gob-side retaining technology, technical problems of roadside support must be solved. At present, the roadside support technology adopted in my country mainly focuses on the single application of the passive support body of the roadside, and the work of actively strengthening the roadside support has only begun in recent years. However, generally only the support mode of the active support at the roadside is considered, and there is little research on the timing of the ...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D15/44
Inventor 郭忠平尹中凯刘崇凌段会强杨松
Owner SHANDONG UNIV OF SCI & TECH