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Method for actively supporting lane side filling gob-side entry retaining

An active technology for retaining an empty entry, applied in the direction of filling, roof beam supporting mine roof, earthwork drilling and mining, etc., it can solve problems that have not been solved well, reduce the initial subsidence, and improve the use of Effect, the effect of enhancing the top cutting ability

Inactive Publication Date: 2013-06-19
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a difficulty in retaining alleys along the gob, alleyside support has not been well resolved in our country.

Method used

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  • Method for actively supporting lane side filling gob-side entry retaining
  • Method for actively supporting lane side filling gob-side entry retaining
  • Method for actively supporting lane side filling gob-side entry retaining

Examples

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Embodiment Construction

[0016] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0017] The method of actively supporting roadside filling and retaining along the gob of the present invention includes three aspects: retaining roadway support and strengthening support, constructing the filling wall of the reserved roadway, and applying initial support force to the roof of the reserved roadway. The specific operation steps are as follows:

[0018] a. Firstly, according to the conditions of the roadway roof rock layer 8 and the roof activity rule in the goaf 2, the roadway support 6 is adopted in the roadway to be preserved, and the roadway support 10 or the anchor rod 9 can be used for roadway support. A combination of the two support methods can be used for the broken roof. According to the conventional method, adopt the shed 10 and the anchor rod 9 to support the roadway in the working face 6. The shed support 10 includes the I-shaped ...

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Abstract

The invention discloses a method for actively supporting a lane side filling gob-side entry retraining. Firstly, a lane interior support and an enforcing support are built on a reserved lane according to a sounding rock condition and a working face. On the back of the working face, nogs, gangues or blockworks and the like are adopted to build a lane side filling wall along the edge of a gob. High-strength and sealed filling bags are paved on the filling wall, and high-expanding materials or cement coagulation serous fluid added with a rapid hardening early strength agent is filled into the filling bags through a grouting pump. The enforcing support is dismounted after a top plate behind the working face is movably stabilized, the high-strength and sealed filling bags are enabled to be contacted tightly with the top plate, and active support force is formed to be exerted on the top plate. By means of the active support force provided for the lane side filing wall, the top cutting capacity of a lane side filling body is enhanced, initial deflection of the entry retaining top plate is reduced, the stability of the top plate is improved, the quality of the gob-side entry retaining is improved, and repair rate of the gob-side entry retaining is reduced. The method is simple, convenient to operate and good in effect.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for roadside filling and goaf retention that can provide active support. Background technique [0002] Gobside entry retaining, as a coal pillar-free entry protection technology, is an effective way to rationally develop existing coal resources and increase the recovery rate of coal resources. According to the analysis of the existing coal pillar-free mining system, gob-side entry retention can generally increase the mine recovery rate by more than 10%, and the roadway excavation rate and roadway maintenance costs can be reduced by about 30%, and some mines can reduce the rate by as much as 40%. Gobside retaining technology can greatly reduce the excavation amount of mine roadway, alleviate the tension of excavation replacement, shorten the time of moving the working face, prevent fire, and extend the service life of the mine. At the same time, this technology provi...

Claims

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Application Information

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IPC IPC(8): E21D15/44E21D17/00E21F15/00
Inventor 杨培举刘长友鲁岩张宁波郭卫彬路鑫
Owner CHINA UNIV OF MINING & TECH
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