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A Partitioned Filling Method for Controlling Large Area Caving Disasters of Hard Roofs

A hard roof, large area technology, applied in the fields of filling, earthwork drilling, safety devices, etc., can solve the problems of high roof control cost, complicated construction process, difficult to effectively control hard roof, etc. The method is simple and reduces the effect of surface subsidence

Inactive Publication Date: 2017-07-28
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively solve the above-mentioned problems existing in the current roof control technology, such as high cost of roof control, complicated construction technology, and a series of outstanding problems such as the difficulty of effectively controlling the hard roof fundamentally.

Method used

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  • A Partitioned Filling Method for Controlling Large Area Caving Disasters of Hard Roofs
  • A Partitioned Filling Method for Controlling Large Area Caving Disasters of Hard Roofs
  • A Partitioned Filling Method for Controlling Large Area Caving Disasters of Hard Roofs

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Embodiment Construction

[0014] Such as figure 1 A partitioned filling method for controlling large-area collapse disasters of a hard roof is shown, including: the main support filling zone 1 in the goaf; the concrete grouting pipeline 2; the grouting area 3 for high-water materials in the goaf; Grouting pipeline 4 in the area; steel frame 4a; grouting hole 4b; roof separation zone 5; roof separation zone grouting pipeline 6; annular rubber sealing plug 6a; solid coal 7; working face 8; filling pump station 9; Reinforcing rigging; steel strands 10a; pallets 10b; reinforced ladder beams 10c; metal mesh 11.

[0015] A partition filling method for controlling large-area collapse disasters of a hard roof according to the present application. The supporting method is as follows: when the working face 8 advances a certain distance from the cut hole, lay corresponding At the same time, 1 to 3 deep holes are uniformly drilled into the roof at the rear of the entire working face, and the drilling depth reache...

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Abstract

The invention discloses a subarea filling method used for controlling a large-area falling disaster of a hard roof. According to the subarea filling method used for controlling the large-area falling disaster of the hard roof, a gob is divided into main supporting filling zones, an auxiliary filling area and a roof separation filling area; each main supporting filling zone is mainly composed of discarded gangue, concrete, short anchor cables and supporting components so as to have strong supporting and closing ability; the auxiliary filling area is mainly arranged in a closed space between the two main supporting filling zones and filled with highly-hydraulic materials or other materials; in the sinking process of the roof, the main supporting filling zones and coal walls on the two sides have a restraining effect on a filler, so the filler in the auxiliary filling area has high supporting ability; in the roof separation filling area, high-pressure grouting filling is conducted in the area where the roof is subjected to separation within the range of the auxiliary filling area so as to prevent separation of rock strata at upper levels, and then subsidence can be effectively controlled.

Description

technical field [0001] The invention relates to a coal mine goaf treatment method, which is suitable for a divisional filling method for controlling large-area collapse disasters of hard roofs Background technique [0002] The problem of hard roof treatment in coal mine goaf is an important problem that plagues the safe and efficient production of mine working faces. When the roof of the mining coal seam is a complete and hard rock formation, as the working face advances, a large area of ​​the hard roof above the goaf hangs in the air without corresponding collapse, resulting in a gradual increase in the overhang area of ​​the roof above the goaf behind the working face At this time, the hard roof has accumulated a large amount of elastic energy, and once a large area collapses, it will produce strong impact ground pressure. In addition, a large amount of air in the goaf was suddenly compressed, creating a hurricane in the roadway, which impacted and damaged all mining equi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/08E21F15/04
CPCE21F15/04E21F15/08
Inventor 谢生荣孙运江马占元李世俊
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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