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Goaf surrounding rock around gob-side supporting method under three soft geological condition

A technology of geological conditions and gobs, applied in underground chambers, temporary shields, mining equipment, etc., can solve problems such as implementation constraints, achieve simple technology, reduce rock roadway engineering, and eliminate the threat of coal and gas outbursts Effect

Active Publication Date: 2008-10-08
HUAINAN MINING IND GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems of surrounding rock control and support in the goaf under the "three soft" geological conditions in the retained roadway of the goaf, which restricts the specific implementation of this technology

Method used

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  • Goaf surrounding rock around gob-side supporting method under three soft geological condition
  • Goaf surrounding rock around gob-side supporting method under three soft geological condition
  • Goaf surrounding rock around gob-side supporting method under three soft geological condition

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Embodiment Construction

[0039] In this embodiment, the support for the surrounding rock of the gob retaining roadway under the "three soft" geological conditions is carried out as follows:

[0040] 1. Reinforce the lane

[0041] According to the ventilation requirements, expand the section of the roadway retaining roadway to the two sides and the bottom plate; firstly cover the side of the roadway retaining, and then expand the roadway section. It is required that the expanded section has a reserved deformation. Generally, the two sides are not less than 800mm, and the roof is quite large. 500mm, and meet the ventilation requirements of 8m 2 , it is not allowed to lift the roof during construction;

[0042] On the full section of the primary roadway retention, erect shrinkable U-shaped steel sheds 1 at intervals along the roadway direction, and temporarily reinforce and support the roadway to control the deformation of the roadway. The shrinkable U-shaped steel shed 1 can be deformed without damage...

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Abstract

Disclosed is a method for retaining roadway and supporting the surrounding rock in goafs under geological condition, which is characterized by first reinforcing and retaining roadway for the first time, then constructing the exceeded roadway and finally constructing and retaining roadway for the second time. The method of the invention forms an effective supporting for the secondary retaining roadway along the goafs, thus overcoming the difficulty in supporting roadway in a condition of multi mining activities. The roadway is primarily guaranteed perfect during the mining period and the amount of shrinkage is in the allowed control range, thereby providing technical support and guarantee for smoothly realizing the Y-type ventilation of the working face with high content of methane and promoting the safety production in mine wells.

Description

technical field [0001] The invention relates to a coal mine safety production method. More specifically, it is a surrounding rock support method for gob retaining under the "three soft" geological conditions of soft coal seam, soft roof strata and soft floor strata. Background technique [0002] Gobside entry retention refers to maintaining the roadway along the boundary of the goaf at the back of the working face. It is a relatively advanced coal mining method. It can not only rationally develop coal resources, improve the surrounding rock of the roadway, reduce the amount of roadway excavation, but also benefit the mine. Safe production and improving the economic and technical effects of mines. Some major coal-producing countries in the world adopt forward and backward working face gob-side entry methods to realize coal pillar-free mining. However, the gob-side roadway has to withstand the impact of multiple mining operations, and its mine pressure display and roadway ma...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D11/10E21D11/18E21D21/00E21D19/00
Inventor 袁亮程桦张士环曹广勇卢平薛俊华宋玉王春林梁昌喜
Owner HUAINAN MINING IND GRP
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