CN103994912A - Immersion method capable of maintaining structural integrity of coal sample - Google Patents
Immersion method capable of maintaining structural integrity of coal sample Download PDFInfo
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- CN103994912A CN103994912A CN201410200568.8A CN201410200568A CN103994912A CN 103994912 A CN103994912 A CN 103994912A CN 201410200568 A CN201410200568 A CN 201410200568A CN 103994912 A CN103994912 A CN 103994912A
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Abstract
The invention discloses an immersion method capable of maintaining structural integrity of a coal sample. According to the method, the coal sample is put in a sealed box with a water-permeable separator plate at its bottom, the coal sample is uniformly distributed on the separator plate, and the sealed box is connected with the mist outlet of a humidifier through a plastic flexible pipe; the humidifier atomizes water into ultramicrons which enter the sealed box at a constant rate through the plastic flexible pipe, the mist spray rate of the humidifier is controlled by adjusting a power adjusting knob of the humidifier, whether the interior of the sealed box is in a constant humidity state is determined according to the reading of a humidometer in the humidifier, the ultramicrons uniformly infiltrate into the coal sample through the surface of the coal sample, needless water flows to the lower part of the water-permeable separator plate through water permeation holes in the water-permeable separator plate, a space is left at the lower part of the water-permeable separator plate, so the structure of the coal sample can maintain complete. The method realizes uniform humidification of the coal sample, can control humidity of the coal sample, is convenient and fast to use and has important practical significance to preparation of coal samples with different water contents and exploration of the strength weakening rule of coal rock under the action of water in a laboratory.
Description
Technical field
The present invention relates to a kind of immersion method that keeps coal sample structural intergrity, be applicable to the laboratory treatment of different water cut coal sample, further can probe into coal mass strength under water effect and weaken rule.
Background technology
The effect of water and coal petrography is one of the focus of current Engineering Rock Mechanics research and difficult point.Under water body, under water-bearing zone, on confined aquifer or during the digging of water guide near Faults, for preventing that surface water or underground water from bursting into work place, coal (rock) layer that need to reserve certain width or height is not adopted, as waterproof coal (rock) post.The intensity of coal column intensity and coal petrography test block be while carrying out Coal Pillar Design basis and crucial.Therefore, probe into coal petrography weakening strength rule under water effect and can provide basic reference for the research of water proof stability of coal pillar.Large quantity research is to carry out under dry and full regimen condition based on a certain coal sample both at home and abroad at present, and relatively less for the research of different coal samples coal petrography mechanical characteristic under undersaturated condition.Therefore study the coal rock strength feature in different water cut situation, probe into coal rock strength with the Changing Pattern of water percentage, the long-time stability of we better being studied to down-hole water proof coal petrography post provide theoretical foundation.Carrying out Changing Pattern when experiment of coal mass strength with water percentage, classic method is directly coal sample to be directly immersed in water, because experiment coal sample volume is little, in addition the space of coal body itself, characteristics of fracture development, after long-time, coal sample is easy to the swelling state that reaches capacity, and causes the integrally-built damage of coal sample.The present invention adopts a kind of immersion method that can keep coal sample structural integrity, and coal sample is placed in the seal box of bottom with permeable dividing plate, and coal sample is distributed on dividing plate, and seal box is connected with the fog outlet of humidifier by plastic hose.By the power regulating knob of conditioning moisturer, control the spray rate of humidifier, according to the reading of humidometer in seal box, determine in case in humidity constant state, the ultramicron that humidifier atomizes water into enters in seal box by plastic hose with constant speed, ultramicron is inner by the infiltration coal sample of the surface uniform of coal sample, and it is complete that coal sample structure can keep.This plays important basic role for probing into coal petrography weakening strength rule under water effect.
Summary of the invention
The invention provides a kind of immersion method that keeps lithostructure integrality, be applicable to the laboratory treatment of different water cut coal sample, to probing into coal mass strength reduction rule under water effect, play important basic role.To the research of water-coal petrography mechanical characteristic, also can play good basic reference value.
The technology of the present invention thes contents are as follows:
A. coal sample is placed in the seal box of bottom with permeable dividing plate, coal sample is distributed on dividing plate, and seal box is connected with the fog outlet of humidifier by plastic hose.
B. by the power regulating knob of conditioning moisturer, control the spray rate of humidifier, according to the reading of humidometer in seal box, determine in case in humidity constant state, the ultramicron that humidifier atomizes water into enters in seal box by plastic hose with constant speed, ultramicron is inner by the infiltration coal sample of the surface uniform of coal sample, unnecessary moisture can be flow to by the permeable hole of permeable dividing plate the bottom of seal box, permeable the lower partition certain space of having more than needed, guarantee that coal sample bottom is not directly immersed in water, it is complete that coal sample structure can keep.
Beneficial effect of the present invention: the invention solves coal sample and directly put into for a long time the problem that water immersion easily causes one-piece construction to damage, by regulating the power of air humidifier, according to the reading of humidometer in seal box, determine in case in humidity constant state, the ultramicron atomizing water into is transferred in seal box by plastic hose with constant speed, ultramicron is inner by the infiltration coal sample of the surface uniform of coal sample, it is complete that coal sample structure can keep, this prepares different water cut coal sample to preparation experiment chamber, probe into coal petrography weakening strength rule under water effect and play important basic role.The method is even to coal sample humidification, and humidity can be controlled, convenient to use.
Accompanying drawing explanation
Fig. 1 is coal sample immersion method schematic diagram of the present invention
Fig. 2 is permeable dividing plate schematic diagram in seal box of the present invention
Fig. 3 is coal sample immersion device three-dimensional simulation figure of the present invention
1-humidifier; 2-seal box; The permeable dividing plate of 3-; 4-plastic hose;
5-power regulating knob; 6-humidometer; 7-fog outlet; 8-coal sample; 9-permeable hole.
Coal sample immersion test process
Below in conjunction with accompanying drawing, coal sample immersion process of the present invention is further described:
A. coal sample is placed in the seal box (2) of bottom with permeable dividing plate (3), it is upper that coal sample is distributed on permeable dividing plate (3), and seal box is connected with the fog outlet (7) of humidifier (1) by plastic hose (4).
B. by the power regulating knob (5) of conditioning moisturer (1), control the speed of humidifier (1) spraying, according to the reading of the interior humidometer of seal box (2) (6), determine that case is interior in humidity constant state, the ultramicron that humidifier (1) atomizes water into enters in seal box (2) by plastic hose (4) with constant speed.Ultramicron is inner by the infiltration coal sample of the surface uniform of coal sample (8), unnecessary moisture can be flow to by the permeable hole (9) of permeable dividing plate (3) bottom of seal box, permeable the lower partition certain space of having more than needed, guarantee that coal sample bottom is not directly immersed in water, it is complete that coal sample structure can keep.
Claims (3)
1. one kind keeps the immersion method of coal sample structural intergrity it is characterized in that:
A. coal sample is placed in the seal box with permeable dividing plate, coal sample is distributed on permeable dividing plate, and seal box is connected with the fog outlet of humidifier by plastic hose.
B. by the power regulating knob of conditioning moisturer, control the spray rate of humidifier, according to the reading of humidometer in seal box, guarantee in case in humidity constant state.The ultramicron that humidifier atomizes water into enters in seal box by plastic hose with constant speed, ultramicron is inner by the infiltration coal sample of the surface uniform of coal sample, unnecessary moisture can be flow to by the permeable hole of permeable dividing plate seal box bottom, permeable the lower partition certain space of having more than needed, guarantee that coal sample bottom is not directly immersed in water, it is complete that coal sample structure can keep.
2. a kind of immersion method that keeps coal sample structural intergrity according to claim 1, is characterized in that:
The volume of described humidifier is 4～5L, and the external diameter of fog outlet is 20～30mm, internal diameter 10～15mm.
3. a kind of immersion method that keeps coal sample structural integrity according to claim 1, is characterized in that:
The length of described plastic hose is 0.5～1m, and in permeable dividing plate, permeable hole is area 60～100mm
2rectangle and permeable dividing plate apart from seal box bottom at least 30～40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200568.8A CN103994912B (en) | 2014-05-11 | 2014-05-11 | A kind of immersion method keeping coal sample structural intergrity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200568.8A CN103994912B (en) | 2014-05-11 | 2014-05-11 | A kind of immersion method keeping coal sample structural intergrity |
Publications (2)
| Publication Number | Publication Date |
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| CN103994912A true CN103994912A (en) | 2014-08-20 |
| CN103994912B CN103994912B (en) | 2016-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410200568.8A Expired - Fee Related CN103994912B (en) | 2014-05-11 | 2014-05-11 | A kind of immersion method keeping coal sample structural intergrity |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201286230Y (en) * | 2008-09-28 | 2009-08-12 | 中国农业科学院蔬菜花卉研究所 | Vegetable seeds germination box |
| CN102937540A (en) * | 2012-06-26 | 2013-02-20 | 湖南三德科技发展有限公司 | Hot air penetrating internal circulation coal sample dehumidifying device capable of automatically conveying samples and taking samples |
| CN102937539A (en) * | 2012-06-26 | 2013-02-20 | 湖南三德科技发展有限公司 | Hot air penetrating internal circulation coal sample dehumidifying device |
| CN102944453A (en) * | 2012-06-26 | 2013-02-27 | 湖南三德科技发展有限公司 | Vertical rotation-type coal sample rapid dehumidification device having dynamic moisture detection function |
| CN102998204A (en) * | 2012-12-20 | 2013-03-27 | 中国矿业大学 | Device and method for preparing water-containing coal sample and testing adsorption |
-
2014
- 2014-05-11 CN CN201410200568.8A patent/CN103994912B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201286230Y (en) * | 2008-09-28 | 2009-08-12 | 中国农业科学院蔬菜花卉研究所 | Vegetable seeds germination box |
| CN102937540A (en) * | 2012-06-26 | 2013-02-20 | 湖南三德科技发展有限公司 | Hot air penetrating internal circulation coal sample dehumidifying device capable of automatically conveying samples and taking samples |
| CN102937539A (en) * | 2012-06-26 | 2013-02-20 | 湖南三德科技发展有限公司 | Hot air penetrating internal circulation coal sample dehumidifying device |
| CN102944453A (en) * | 2012-06-26 | 2013-02-27 | 湖南三德科技发展有限公司 | Vertical rotation-type coal sample rapid dehumidification device having dynamic moisture detection function |
| WO2014000522A1 (en) * | 2012-06-26 | 2014-01-03 | 湖南三德科技股份有限公司 | Hot air penetrating internal circulation coal sample dehumidifying device |
| CN102998204A (en) * | 2012-12-20 | 2013-03-27 | 中国矿业大学 | Device and method for preparing water-containing coal sample and testing adsorption |
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| CN103994912B (en) | 2016-10-19 |
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Granted publication date: 20161019 Termination date: 20200511 |