New technology for conducting grouting filling for underground coal goaf and abandoned workings

A kind of goaf and new technology, which is applied in the fields of backfill, mining equipment, earthwork drilling, etc., can solve the problems of wasting time, difficult to realize the micro-pressure grouting process, and unable to realize the non-pressure grouting process with large flow rate, etc. , to achieve the effect of saving construction time

Active Publication Date: 2017-09-29
FUJIAN YONGQIANG SOIL
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Problems solved by technology

In view of the traditional operation line, only the pressure grouting process with small flow rate can be realized, the non-pressure grouting process with large flow rate cannot be realized, and it is difficult to realize the micro-pressure grouting process with medium flow rate (unless the grouting distance is very short); consider In the actual grouting operation, for the collapsed abandoned coal mine roadway and coal seam goaf, because the space is filled with irregular large plate-shaped stones, these stones are randomly stacked and stacked, for

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  • New technology for conducting grouting filling for underground coal goaf and abandoned workings
  • New technology for conducting grouting filling for underground coal goaf and abandoned workings

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[0016] The construction steps of the new technology of grouting and grouting filling for underground coal goafs and waste roadways of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Step 1: Leading hole: Use geological drilling rigs or down-the-hole drilling rigs to drill holes from the ground surface to the ground directly or through the coal goaf or abandoned roadway in the deep part of the formation and other related cavities, gaps, fissures, etc.

[0018] The second step: grouting without pressure grouting:

[0019] (1) Pulp making: The grouting slurry consists of a dry powder ash tank, a dry powder conveying pipe, a Y-shaped pipe that can conduct diversion sampling and real-time monitoring of the dry powder flow process, a slurry mixing pipe, a mixing barrel, and agitation. The pool and other components form a new technology pulping backstage mixing production. One is that the pulping backgro...

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Abstract

The invention relates to a new technology for conducting grouting filling for underground coal goaf and abandoned workings. The technology is characterized in that in grouting construction, the methods of sequentially conducting pressure-free grouting, micropressure grouting and repeated pressure grouting (increasing grouting pressure gradually) are adopted; the grouting filling construction efficiency can be greatly improved for the underground coal goaf and the abandoned workings, the construction period is greatly shortened, the construction cost is lowered, and then the pressure of grouting is truly increased to be about 5 MPa, and the construction quality is guaranteed.

Description

technical field [0001] The invention relates to the field of civil engineering construction, in particular to the construction field of foundation reinforcement grouting engineering and underground filling grouting engineering, specifically a new technology for grouting and grouting filling for underground coal mined-out areas and waste roadways. Background technique [0002] At present, for the uncollapsed coal mine waste roadway and coal seam goaf in the deep underground, it is usually adopted to drill a large hole from the ground to the ground ( 130 or more), and then use commercial concrete tank trucks to transport cement mortar with a label of about M5 to the drill hole, and directly discharge the mortar into the large hole, and the mortar will flow down to the deep cavity by gravity and then flow horizontally to fill the larger cavity space; For the collapsed coal mine roadway and coal seam goaf, as well as the natural gap above the collapse and rock formation fissure...

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Application Information

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IPC IPC(8): E21F15/00E21B33/13E21B7/04
CPCE21B7/04E21B33/13E21F15/00
Inventor 龚义邱维衍孔秋平张强许万强罗承浩郑添寿李丽虹
Owner FUJIAN YONGQIANG SOIL
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