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A Construction Technology of Gangue Filling-Grouting Reinforcement in Deep Mine without Coal Pillars

A technology of grouting reinforcement and construction technology, which is applied in the direction of filling, mining equipment, earthwork drilling and mining, etc., can solve the problems of insufficient airtightness of toxic and harmful gases, and achieve reasonable and significant particle gradation, good economy, and improved strength Effect

Active Publication Date: 2021-11-23
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a construction technology of gangue filling-grouting reinforcement for deep wells with no coal pillars along the gob entry, so as to make up for the existing deep mine without coal pillars along the gob entry retention The defects of the construction technology in terms of the strength of the filling wall beside the roadway and the insufficient airtightness of toxic and harmful gases such as gas

Method used

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  • A Construction Technology of Gangue Filling-Grouting Reinforcement in Deep Mine without Coal Pillars
  • A Construction Technology of Gangue Filling-Grouting Reinforcement in Deep Mine without Coal Pillars
  • A Construction Technology of Gangue Filling-Grouting Reinforcement in Deep Mine without Coal Pillars

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:

[0034] Such as figure 1 As shown, the gangue filling-grouting reinforcement deep well without coal pillar gobside entry construction process of the present invention uses gangue filling wall frame, gangue crushing and transportation system and grouting reinforcement system;

[0035] Specific steps include:

[0036] Step 1. The roadway that is being excavated on the adjacent working face, that is, the roadway that is closest to the gob-side entry and is being excavated is the excavation roadway. Use the gangue crushing and transportation system to crush the large pieces of gangue generated by the excavation roadway before transporting to Gob-side lanes;

[0037] Step 2, build a filling wall frame next to the goaf side of the original roadway, and the size of the retained roadway is consistent with the original roadway;

[0038] Step 3: The crushed g...

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Abstract

The invention discloses a gangue filling-grouting construction technology for reinforcing deep wells with no coal pillars along the gob entry, which is suitable for mining in deep wells without coal pillars. Utilize mined gangue, I-shaped steel frame, longitudinal and transverse connecting rods, metal mesh, biaxially stretched plastic mesh, double-sided self-adhesive sealing coil, grouting anchor cable, foamed concrete spray layer, polyurethane anti-weather coating , Belt conveyors, dumping machines, etc. The method is divided into four stages, firstly digging roadway gangue crushing and belt transport; then constructing gangue filling wall frame; third broken gangue projectile filling and grouting reinforcement; finally anchoring grouting anchor cables and spraying polyurethane coating. It uses gangue as filling material, combined with grouting reinforcement, the grouting anchor cable improves the strength of the filling wall beside the roadway, and the polyurethane coating improves the air tightness and weathering resistance of the filling wall, realizing the gob-side entry retention without coal pillars It has the advantages of reliable economy, simple structure and good social benefits.

Description

technical field [0001] The invention relates to the technical field of gob-side entry retention in coal mines, in particular to a gangue filling-grouting reinforcement construction technology for gob-side entry retention suitable for mining in deep mines without coal pillars. Background technique [0002] In recent years, with the large-scale production of coal in my country, the amount of coal gangue is also increasing. A large amount of coal gangue not only occupies a large amount of land, but also often occurs accidents such as spontaneous combustion and landslides, which have brought serious environmental problems. . At the same time, it takes a lot of manpower and material resources to raise the underground gangue into the well, and there are many links in the underground gangue transportation, which has great potential safety hazards. With the country's increasing environmental protection requirements for coal production, further exploration and attempts are needed in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/00E21F15/04E21F15/08
CPCE21F15/005E21F15/04E21F15/08
Inventor 孟庆彬王杰黄炳香王琦浦海周跃进刘江峰孙稳
Owner CHINA UNIV OF MINING & TECH
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