CN104390760A - Wind resistance test method for vertical material transporting and feeding - Google Patents
Wind resistance test method for vertical material transporting and feeding Download PDFInfo
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- CN104390760A CN104390760A CN201410559357.3A CN201410559357A CN104390760A CN 104390760 A CN104390760 A CN 104390760A CN 201410559357 A CN201410559357 A CN 201410559357A CN 104390760 A CN104390760 A CN 104390760A
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Abstract
The invention relates to a wind resistance test method for vertical material transporting and feeding, wherein the method is mainly used for the wind resistance laboratory testing for the vertical filling material transporting and feeding during the solid backfilling and exploiting process. A ventilation rate of material feeding is determined according to a capacity of feeding a material into a vertical material feeding well; on the basis of the ventilation rate, a wind resistance test model is manufactured; and the wind resistance test model is installed in a wind tunnel to carry out wind resistance experiment testing, and a rotating angle of an intermediate adjusting pipe segment is adjusted according to ventilation rates needed to be tested, thereby obtaining wind resistance values of different rotating angles. According to the method, the ventilation rate of the material feeding process is determined according to a formula, the wind resistance test module is manufactured according to the ventilation rate, and the wind resistance test module is installed in the wind tunnel to carry out wind resistance test and the wind resistance value is recorded. The method is simple and is easy to operate; the accuracy is high; and the method has the wide practicability.
Description
Technical field
The present invention relates to a kind of material and vertically throw in windage method of testing, be particularly useful for the solid filling of mine down-hole.
Background technology
In recent years along with development and the progress of solid filling coal-mining technique, this technology, since successfully researching and developing, has been applied at present, has been extended to more than ten mining area, the whole nation.Change for advancing coal production mode, solve " three times " (under buildings, under railway, water body is inferior) resource exploitation such as pressure coal and residual coal at the margins of mining areas etc., improve Coal Resource Development and utilize level, improve environment of mining area, promote that coal industry develops in a healthy way and made tremendous contribution, wherein the vertical jettison system of solid material is vital ingredient in solid filling coal mining system, attal continuous, safety is thrown in, can be related to solid filling material timely in workplace goaf, effective filling, and then control the movement and deformation on earth's surface, therefore the motion studying the gas-particle two-phase of solid filling material in launch process has great importance.
Solid filling material vertical feeding pipe is an elongated closed space, and solid filling material is thrown in pipeline, the motion of the gas-particle two-phase that relates to, is a very complicated process.The vertical continuous of solid filling material throws in the flowing that must cause gas, thus cause the interaction at the volley of gas and solid, research solid filling material throw in windage characteristic, for setting up the governing equation of solid filling material movement and analyzing the distribution of airflow field in commissioning pipe and variation characteristic and there is important theory and practice be worth.Therefore, safe, continuous vertical input of solid material vertically throws in windage method of testing in the urgent need to a kind of material.
Summary of the invention
Technical matters: the object of the invention is for Problems existing in prior art, provide a kind of easy to operate, safely and efficiently material vertically throw in windage method of testing.
Technical scheme: windage method of testing vertically thrown in by material of the present invention, comprises the steps:
A. the ventilative rate of throwing in material is determined according to the input ability of throwing in material in vertical feeding well;
B. windage test model is made according to ventilative rate; Described windage test model comprises the pipeline section windward, intermediate regulations pipeline section and the afterbody that are linked in sequence and fixes pipeline section, the windward side of pipeline section is dome shape windward, and pipeline section, intermediate regulations pipeline section and afterbody are fixed on pipeline section and had multiple open-work be interconnected windward;
C. windage test model is arranged in wind-tunnel and carries out Windage loss test, by the anglec of rotation of required test ventilative rate size adjustment intermediate regulations pipeline section, the size of different rotary angle windage value can be obtained.
The described vertical input ability by material determines that the ventilative rate of throwing in material is by formula:
draw, in formula: A is that solid filling material throws in ability, kg/s; T is charging time, s, presses freely falling body herein and calculates; P
r falls apartfor solid filling material loosening density, kg/m
3.
Described pipeline section windward, intermediate regulations pipeline section and afterbody are fixed angle relative between pipeline section and are respectively 0 °, 20 °, 30 °, and the ventilative rate of model is respectively 41%, 17%, 10%.
Beneficial effect: the present invention establishes the Windage loss room method of testing in the vertical launch process of solid filling material of complete set, comprise: by the vertical input ability of solid filling material, according to the ventilative rate in formula determination material launch process, windage test model is made according to ventilative rate, windage test model is arranged in wind-tunnel, carry out Windage loss test, record windage value size.This method is simple, and only need know on-the-spot vertical delivery ability, can make corresponding windage test model according to result of calculation, its cost is low, and windage test result accuracy is high, has practicality widely
Accompanying drawing explanation
Fig. 1 is windage test model front view (FV) of the present invention;
In figure: pipeline section-1 windward, intermediate regulations pipeline section-2, afterbody fixes pipeline section-3;
Fig. 2 (a) is cross sectional shape figure during windage test model 0 ° of rotation status of the present invention;
Fig. 2 (b) is cross sectional shape figure during windage test model 20 ° of rotation status of the present invention;
Fig. 2 (c) is cross sectional shape figure during windage test model 30 ° of rotation status of the present invention.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Windage method of testing vertically thrown in by material of the present invention, and concrete steps are as follows:
A. the ventilative rate of throwing in material is determined according to the input ability of throwing in material in vertical feeding well; The described vertical input ability by material determines that the ventilative rate of throwing in material is by formula:
draw, in formula: A is that solid filling material throws in ability, kg/s; T is charging time, s, presses freely falling body herein and calculates; P
r falls apartfor solid filling material loosening density, kg/m
3.
B. windage test model is made according to ventilative rate; Described windage test model comprises the pipeline section windward 1, intermediate regulations pipeline section 2 and the afterbody that are linked in sequence and fixes pipeline section 3, the windward side of pipeline section 1 is dome shape windward, pipeline section 1, intermediate regulations pipeline section 2 and afterbody are fixed on pipeline section 3 and are had multiple open-work be interconnected windward, can relatively rotate between every two sections, realized by intermediate regulations pipeline section 2, when pipeline section 1, intermediate regulations pipeline section 2 and afterbody windward fix angle relative between pipeline section 3 be respectively 0 °, 20 °, 30 ° time, the ventilative rate of model is respectively 41%, 17%, 10%.
C. windage test model is arranged in wind-tunnel and carries out Windage loss test, by the anglec of rotation of the intermediate regulations pipeline section 2 of required test ventilative rate size adjustment windage test model, the size of the windage value of the different rotary angle of windage test model can be realized.
Embodiment 1, certain ore deposit adopt solid filling coal-mining technique, and the well throughput rate that feeds intake is 700t/h, and Confirming model equivalent diameter is about 290mm, and namely R is 0.29m; In the longitudinal direction, in order to enough show flow field by the distribution after disturbance, Confirming model length is 0.5m, and namely H is 0.5m.Through type
the volumetric concentration calculating solid filling material is about 59.8%.According to the definition of ventilative rate, obtain ventilative rate V
kbe 40.2%.Model windward side is dome shape, and model is made up of three joints, and three-dimensional experiment model is divided into pipeline section 1, intermediate regulations pipeline section 2 and afterbody windward to fix pipeline section 3, and model as shown in Figure 1.Simulate its ventilative rate through in model internal openings, when to realize every 2-section pipe section relative angle by regulating intermediate regulations pipeline section 2 be 0 °, 20 °, 30 °, the ventilative rate of model is about 41%, 17%, 10%.
Based on the model installed, respectively windage test is carried out to the model under three kinds of different cross section situations, provide wind speed to be 40m/s, consider the interference effect of support bar stream field, first carry out windage test to support bar, namely windage test findings has all carried out support interferences correction; Carry out windage test to model and support bar entirety again, the windage finally removing support bar is the windage value of model, shown in the model windage obtained after tested under three kinds of different cross section states sees the following form.
Table 1 windage Fx test result
Claims (3)
1. a windage method of testing vertically thrown in by material, it is characterized in that, comprises the steps:
A. the ventilative rate of throwing in material is determined according to the input ability of throwing in material in vertical feeding well;
B. windage test model is made according to ventilative rate; Described windage test model comprises the pipeline section windward (1), intermediate regulations pipeline section (2) and the afterbody that are linked in sequence and fixes pipeline section (3), the windward side of pipeline section (1) is dome shape windward, and pipeline section (1), intermediate regulations pipeline section (2) and afterbody are fixed on pipeline section (3) and had multiple open-work be interconnected windward;
C. windage test model is arranged in wind-tunnel and carries out Windage loss test, by the anglec of rotation of ventilative rate size adjustment intermediate regulations pipeline section (2) of required test, the size of different rotary angle windage value can be obtained.
2. windage method of testing vertically thrown in by a kind of material according to claim 1, it is characterized in that: the described vertical input ability by material determines that the ventilative rate of throwing in material is by formula:
draw, in formula: A is that solid filling material throws in ability, kg/s; T is charging time, s, presses freely falling body herein and calculates; P
r falls apartfor solid filling material loosening density, kg/m
3.
3. windage method of testing vertically thrown in by a kind of material according to claim 1, it is characterized in that: when described pipeline section windward (1), intermediate regulations pipeline section (2) and afterbody fix that between pipeline section (3), relative angle is respectively 0 °, 20 °, 30 °, the ventilative rate of model is respectively 41%, 17%, 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410559357.3A CN104390760A (en) | 2014-10-20 | 2014-10-20 | Wind resistance test method for vertical material transporting and feeding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410559357.3A CN104390760A (en) | 2014-10-20 | 2014-10-20 | Wind resistance test method for vertical material transporting and feeding |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010243400A (en) * | 2009-04-08 | 2010-10-28 | Japan Aerospace Exploration Agency | Building berth support interference correcting method in subsonic half model wind tunnel test |
| CN102539110A (en) * | 2010-12-20 | 2012-07-04 | 西安开容电子技术有限责任公司 | Wind resistance character testing device and design method thereof |
| CN103266906A (en) * | 2013-05-03 | 2013-08-28 | 中国矿业大学 | Method for verifying state of mine ventilation system by self-adjusting tunnel wind resistance parameters |
| CN103630322A (en) * | 2013-11-29 | 2014-03-12 | 华南理工大学 | Resistance measuring device and method for measuring wind resistance factor of non-smooth surface object |
-
2014
- 2014-10-20 CN CN201410559357.3A patent/CN104390760A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010243400A (en) * | 2009-04-08 | 2010-10-28 | Japan Aerospace Exploration Agency | Building berth support interference correcting method in subsonic half model wind tunnel test |
| CN102539110A (en) * | 2010-12-20 | 2012-07-04 | 西安开容电子技术有限责任公司 | Wind resistance character testing device and design method thereof |
| CN103266906A (en) * | 2013-05-03 | 2013-08-28 | 中国矿业大学 | Method for verifying state of mine ventilation system by self-adjusting tunnel wind resistance parameters |
| CN103630322A (en) * | 2013-11-29 | 2014-03-12 | 华南理工大学 | Resistance measuring device and method for measuring wind resistance factor of non-smooth surface object |
Non-Patent Citations (1)
| Title |
|---|
| 巨峰: "固体充填采煤物料垂直输送技术开发与工程应用", 《中国博士学位论文全文数据库 工程科技I辑》 * |
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Application publication date: 20150304 |
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