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Bonding filling material and method for carrying out downhole filling using the same

A technology for filling materials and fly ash, which is applied in the fields of filling materials, chemical instruments and methods, and earth-moving drilling and mining, etc., can solve the problems such as the inability to achieve the filling effect, achieve continuity and high efficiency, increase the cementation performance, and reduce the environment. The effect of pollution

Active Publication Date: 2011-04-20
JIZHONG ENERGY +1
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

However, in the existing technologies, the above-mentioned materials are not effectively used in underground filling and mining operations for recycling filling and waste utilization, let alone achieving a good filling effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A bonded filling material, which comprises the following components: 82.2% by weight of gangue; 12.7% by weight of fly ash; and 5.1% by weight of water. Wherein, the moisture content of the gangue is 2%. The moisture content of the fly ash is 20%.

Embodiment 2

[0021] A bonded filling material, which comprises the following components: 68.6% by weight of gangue; 21.8% by weight of fly ash; 9.6% by weight of water. Wherein, the moisture content of the gangue is 3%. The moisture content of the fly ash is 18%.

[0022] Specifically, D / Max-3B type X-ray diffractometer can be used to test the physical composition of the material; the density of the material can be analyzed by scanning electron microscope (SEM); JA2003 electronic precision balance (Electronic PrecisionBalance), YZH1-30 The moisture content of the material is tested in a far-infrared automatic control electrode oven; the mechanical properties of the material are tested by the MTS815.02 electro-hydraulic servo rock mechanics test system of the American MTS company.

[0023] Through the compaction degree and compaction force test of the filling mixture under different proportioning conditions, the characteristic curve is drawn and analyzed to determine the proportioning of g...

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Abstract

The present invention relates to a bonding filling material and a method for carrying out downhole filling using the same, wherein the said gangue bonding filling material comprises: 68.6-82.2% by weight of gangue; 12.7-21.8% by weight of coal ash; and 1-18.7% by weight of water. Pressure intensity of the rammer compacter for filling and compacting in filling the bonding filling material is more than or equal to 20 Mpa. According to the invention, filling effect and filling quality are improved, and the movement of the overlying strata can be effectively controlled. The bonding filling material is filled directly without any additives, and the bonding property of the bonding filling material is increased due to the addition of coal ash as one filling material. The conveying system in the invention has simple requirements and enables continuity and high effectiveness of the filling. Downhole treatment of gangue and coal ash is fulfilled, and ecological and living environment around mining area are improved.

Description

technical field [0001] The invention relates to a filling material, in particular to a bonding filling material used for coal mine filling and mining, and a method for underground filling using the filling material. Background technique [0002] my country's coal mine filling mining technology has developed rapidly in recent years, but how to find an effective filling material to meet the mine pressure strength of the stope and effectively control the movement of the overlying strata has always been one of the filling technical problems to be solved. The filling materials used in filling mining are generally coal gangue, sand, tailings, fly ash, etc. Gangue is used as aggregate filling, which has a low supporting force, and the addition of cementing materials will affect the strength of the filling body; sand and tailings are used as filling materials, with low transport concentration and high dehydration requirements in the stope; fly ash is only a partial replacement Ceme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/56E21F15/06
Inventor 郝宝生韩益根张书国丁燕斌俞有江张建高国强
Owner JIZHONG ENERGY
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