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Filling method capable of exploring while filling coal mine goaf

A technology of mining and filling, goaf, applied in the fields of backfill, mining equipment, earthwork drilling, etc., can solve the problems of wasting water resources, high filling cost, low filling capacity, etc., to reduce labor intensity and filling strength. High, adaptable effect

Inactive Publication Date: 2011-11-02
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] ①Hydraulic filling: wasting water resources and causing hidden dangers of water accumulation in goafs
[0015] ③Fly ash filling: low filling strength, underground dehydration, large fly ash compression rate, underground drainage pollutes the environment
[0016] ④ Gangue self-sliding filling: increased mining and gangue transportation systems and equipment, high filling costs, reduced mining efficiency, low filling capacity, and ineffective subsidence reduction; not as good as hydraulic and wind filling
[0017] ⑤ Banded gangue filling: In case of insufficient gangue material during the filling process, it is necessary to pick the top to take the material, which increases the labor intensity of the workers, especially the slow construction speed, which affects the advancing speed and output of the working face
[0018] ⑥Coal mine paste filling: the filling material has collapsed and fallen behind the mining roof of the working face, and then injected into the goaf to fill the separated layer and collapsed space. Therefore, it is a passive method to reduce rock settlement and cannot fundamentally control the roof. transport

Method used

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  • Filling method capable of exploring while filling coal mine goaf
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  • Filling method capable of exploring while filling coal mine goaf

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1: A certain working face of Beizao Coal Mine of Shandong Longkou Coal Industry Group

[0049] Mining conditions of Beizao Coal Mine: Mining coal seam thickness is 3m (medium), burial depth is 260m (shallow), coal seam roof rock has high compressive and tensile strength, mining working face length is 150m (commonly adopted), working face support equipment 6 The control top distance is 4.5m (commonly adopted), and the direction of longwall fully mechanized mining;

[0050] 1. Filling parameters of the coal mine working face 11: the number of filling support walls 10 is 15 groups, the distance between groups is 9m, and the width is 1.5m.

[0051] 2. According to the mining process of the working face 11, prepare paste-like material 2, filling pump 4, filling pipeline and accessories;

[0052] ①Use all-sand soil consolidation material as cement, industrial waste or river sand as aggregate, mix 22% fine-grained sand (not greater than 37μm) in the aggregate, and mak...

Embodiment 2

[0061] Example 2: Shanxi Lingshi Tianju Xinhuiyuan Coal Mine

[0062] Mining conditions of Xinhuiyuan Coal Mine: the thickness of the mining coal seam is 1.75m (very thin), the burial depth is 200m (shallow), the compressive and tensile strength of the rock on the roof of the coal seam is high, the length of the mining face is 100m (commonly adopted), the working face supports Protective equipment 6 control top distance 3m (commonly used), and the direction of longwall fully mechanized mining;

[0063] 1. Filling parameters of coal mine working face 11: 12 groups of filling support walls 10, group spacing 7.5m, width 1.5m.

[0064] 2. According to the mining process of the working face 11, prepare paste-like material 2, filling pump 4, filling pipeline and accessories;

[0065] ①Use all-sand soil consolidation materials as cement, industrial waste or river sand as aggregate, and add 28% fine-grained sand (not greater than 37μm) to the aggregate to make the concentration 76% a...

Embodiment 3

[0074] Example 3: Lujialiang Coal Mine, Laogaochuan Township, Fugu County, Shaanxi Province

[0075] Mining conditions of Lujialiang Coal Mine: the thickness of the mining coal seam is 4.5m (thick), the burial depth is 600m (deep), the compressive and tensile strength of the rock on the roof of the coal seam is high, the length of the mining face is 180m (commonly adopted), and the supporting equipment of the working face 6. The control top distance is 5m (commonly adopted), and the direction is longwall fully mechanized mining;

[0076] 1. Filling parameters of the coal mine working face 11: 20 groups of filling support walls 10, the group spacing is 7.5m, and the width is 3m.

[0077] 2. According to the mining process of the working face 11, prepare paste-like material 2, filling pump 4, filling pipeline and accessories;

[0078] ①Use all-sand soil consolidation materials as cement, industrial waste or river sand as aggregate, and add 15% fine-grained sand (not greater tha...

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Abstract

The invention discloses a filling method capable of exploring while filling coal mine goafs, solving the existing problem by that a buttress is filled before direct top inbreak after a working face is boosted. The technical method for construction comprises the following steps: determining the amount and thickness parameters of the buttress; preparing a paste-like material; arranging a transmission pipeline below working surface supporting equipment; installing a paste-like fill pump, a crossheading filling pipeline and the like in a working surface rail crossheading and a conveying crossheading; communicating the fill pump with each group of filling templates in the goaf by the crossheading filling pipeline; after one or two webs are explored for the working face, conveying the paste-like material by the fill pump to serve as the first group of filling buttresses; and after the buttresses filling material is solidified and the working face is boosted for one web, filling the second group of buttresses again. The filling method has the beneficial effect that because the filling method capable of exploring while filling by the paste-like material is adopted, the paste-like material can be filled in time, the breaking range of a roof becomes small, advance mine pressure is obviously weakened, and filling effect is good.

Description

technical field [0001] The invention relates to a goaf treatment method for coal mine mining, in particular to a goaf filling method that is suitable for various coal seam mining, especially suitable for medium-thick coal seam mining. During the mining process, the working face is controlled and reduced. The roof sinks to reduce mine pressure. Background technique [0002] The filling of gobs in coal mines can reduce the subsidence hazards caused by underground mining to the ground. It can reduce the impact of mining on underground roadways and working faces, facilitate roof management, improve roadway maintenance, transportation, ventilation and gas management, and is of great importance to coal mine control. Accidents and subsidence environmental disasters are of great significance to achieve safe production, energy saving and emission reduction. [0003] The filling methods mainly include: [0004] ①Hydraulic filling method is the process of sending the filling slurry i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00E21F15/04
Inventor 李伟夏洪春宋振骐赵晓东彭林军
Owner DALIAN UNIV
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