CN102261942B - Experimental apparatus and method for change rule of mining water level of unconsolidated confined aquifer - Google Patents
Experimental apparatus and method for change rule of mining water level of unconsolidated confined aquifer Download PDFInfo
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- CN102261942B CN102261942B CN201110100723A CN201110100723A CN102261942B CN 102261942 B CN102261942 B CN 102261942B CN 201110100723 A CN201110100723 A CN 201110100723A CN 201110100723 A CN201110100723 A CN 201110100723A CN 102261942 B CN102261942 B CN 102261942B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 151
- 238000005065 mining Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004088 simulation Methods 0.000 claims abstract description 74
- 239000003245 coal Substances 0.000 claims abstract description 34
- 239000011435 rock Substances 0.000 claims abstract description 26
- 230000007423 decrease Effects 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 description 3
- 241001269238 Data Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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Abstract
The invention discloses an experimental apparatus and method for change rule of mining water level of an unconsolidated confined aquifer. The apparatus comprises a data collector and a simulation box, wherein a simulative coal rock bed is arranged in the simulation box, an unconsolidated confined aquifer bag is arranged in the simulative coal rock bed at the upper part of the simulation box, the upper part of one side of the unconsolidated confined aquifer bag is provided with a water level pipe extended out the simulation box, and the other side of the unconsolidated confined aquifer bag is provided with a water inlet pipe extended out the simulation box and connected with a water tank; and the water level pipe is provided with a water level gauge connected with the data collector. Changes of the water level of the aquifer along with the mining of a working face is recorded by the water level gauge, so that an corresponding temporal-spatial relation between the changes of the water level and the movement of a key layer can be simulated, influence factors of the temporal-spatial relation can be simulated, and the temporal-spatial relation between the changes of the water level and a water-conducting crack zone under the confined aquifer also can be simulated. The apparatus is simple in structure, convenient to operate, diversified in use and adjustable in height of a water level supply source, and can implement different confined water heads and meet the simulation requirements under different mining conditions.
Description
Technical field
The present invention relates to a kind of experimental provision and method, especially a kind of unconsolidated confined aquifer is adopted the experimental provision and the method for dynamic water level Changing Pattern.
Background technology
Unconsolidated confined aquifer is mined down, falls that the draining cost is high, the cycle is long owing to dredge, and big to the water body environment influence, mining under safe waterpressure of aquifer are adopted in therefore most of collieries, but by reason of heavy pressure, basement rock is thin, the top board that brings is thus pressed the also increasing thereupon of frame gushing water danger.With colliery, Wan Bei Qidong is example, and they are 3 years old
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1A plurality of workplaces such as 30 have taken place nearly 16 in succession and have similarly pressed frame gushing water accidents, and wherein 6
130 workplaces are from March 1,2009 13 days to 2010 September in, and pressure frame gushing water accident has just taken place to rise from all around between short four months.Frequent pressure frame gushing water accident has badly influenced the ordinary production in colliery, has brought enormous economic loss.
Since flowability and alimentation; Unconsolidated confined aquifer has the loading transfer effect; Cause the exploitation easy generation of key stratum compound disrumpent feelings (being that adjacent two layers or multilayer key stratum are disrumpent feelings synchronously) under the unconsolidated confined aquifer, cause the rapid increase of workplace rock pressure [in mine and the decline suddenly of water-bearing zone water level.Because the workplace rock stratum exists periodic sinking, turns round, collapsing falls, also there are periodic rise and fall in the water-bearing zone water level.Are what kind of quantitative corresponding relation but the decline of water-bearing zone water level and workplace ore deposit pressed to manifest and are existed? Which does its influence factor have? Can come early warning workplace ore deposit to press through water-bearing zone water level slippage and manifest intensity? This method how ageing? These all are not study clearly problem as yet; Therefore; It is very necessary continuing the further investigation unconsolidated confined aquifer frame water bursting disaster early warning of coal mining pressure down mechanism; But at present; Also do not study the experimental provision aspect this in China mining industry field,, designed this cover experimental provision and studied water-bearing zone water level slippage and corresponding time-space relationship and the influence factor thereof of key stratum motion based on this.
Summary of the invention
Technical matters: the objective of the invention is to overcome the problem that prior art exists, a kind of simple in structure, easy to operate, purposes diversification, water level supply source adjustable height are provided, can realize that the unconsolidated confined aquifer of different artesian heads adopts the experimental provision and the method for dynamic water level Changing Pattern.
Technical scheme: unconsolidated confined aquifer of the present invention is adopted the experimental provision of dynamic water level Changing Pattern; Comprise data acquisition unit; The simulation box of simulation coal rock layer is housed in this device; In the simulation rock stratum on simulation box top, be provided with the unconsolidated confined aquifer bag, a upper lateral part of unconsolidated confined aquifer bag is provided with and stretches out the outside water level pipe of simulation box, and opposite side is provided with and stretches out the outside water inlet pipe that is connected with water tank of simulation box; Water level pipe is provided with the water level gauge that links to each other with data acquisition unit.
Said water inlet pipe is provided with the water valve of water meter and controlled water flow amount; The place, simulation coal seam of described simulation box bottom is provided with active window; Said unconsolidated confined aquifer bag by sealed water bag with pack into the sand grains that is about 1cm in the sealed water bag with add in the sealed water bag with sand quality number percent be that 30% water constitutes.
Unconsolidated confined aquifer of the present invention is adopted the experimental technique of dynamic water level Changing Pattern, comprises the steps:
A. adopt cement, lime, gypsum in simulation box, to lay the simulation coal rock layer from lower to upper; In the process of laying the simulation coal rock layer; The unconsolidated confined aquifer bag is placed in middle and upper part at the simulation coal rock layer; And water level pipe is set at a upper lateral part of unconsolidated confined aquifer bag, and the side of opposite side connects water inlet pipe, and water inlet pipe is connected with the water tank that highly is higher than simulation box;
B. at the top of water level pipe water level gauge is installed, and water level gauge is connected with data acquisition unit;
C. open water valve water filling in the unconsolidated confined aquifer bag, stable until the water meter video data, write down the reading of water meter at this moment;
D. open the active window at place, simulation coal seam; Simulation coal seam in the simulation mining simulation box; Gather the SEA LEVEL VARIATION value in the water level pipe through data acquisition unit simultaneously, every reading, every reading at a distance from 60s record water meter at a distance from 0.5s record water level gauge; Observe the situation of change of the simulation rock stratum of top, simulation coal seam simultaneously, draw the relation between simulation formation damage degree and the decline of water table speed.
Beneficial effect: the present invention selects for use and on-the-spot " unconsolidated confined aquifer " similar medium, makes analog result comparatively true and reliable, has reflected on-the-spot actual conditions; Write down four through limnimeter and contain the situation of change of water level, can investigate the time-space relationship of SEA LEVEL VARIATION and key stratum motion, can simulate the relation between water flowing fractured zone variation and the water-bearing zone water level with working face mining.The influence factor that simulation water-bearing zone water level changes with key stratum motion time-space relationship comprises main key stratum position, main key stratum thickness, working face mining speed, four moisture hydraulic pressure, skeleton particle size etc., also can simulate water flowing fractured zone evolution under the confined aquifer and with the time-space relationship of SEA LEVEL VARIATION.But purposes diversification.Water level supply source adjustable height can realize different artesian heads, satisfies the simulation needs under the different mining condition.It is simple in structure, easy to operate, effectively analog operation face rock stratum periodic settling, the situation of turning round, collapsing and, for practice provides reference data.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: the 1-simulation box; 2-unconsolidated confined aquifer bag; The 3-water level gauge; The 4-water valve; 5-data acquisition unit; The 6-water inlet pipe; The 7-water tank; The 8-water level pipe; 9-water meter 10-simulates the coal seam; 11-simulates the rock stratum.
Embodiment
As shown in Figure 1; Unconsolidated confined aquifer of the present invention is adopted the experimental provision of dynamic water level Changing Pattern; Mainly by data acquisition unit 5; Data acquisition unit 5 is selected FYC-3 type float-type liquid level sensor for use, and the simulation box 1 of simulation coal rock layer 11 is housed in this device, and 10 places, simulation coal seam of simulation box 1 bottom are provided with the active window that makes things convenient for folding; In the simulation rock stratum 11 on simulation box 1 top, be provided with unconsolidated confined aquifer bag 2, unconsolidated confined aquifer bag 2 by sealed water bag with pack into the sand grains that is about 1cm in the sealed water bag with add in the sealed water bag with sand quality number percent be that 30% water constitutes.One upper lateral part of unconsolidated confined aquifer bag 2 is provided with the water level pipe 8 that stretches out simulation box 1 outside, and opposite side is provided with and stretches out the simulation box 1 outside water inlet pipe 6 that is connected with water tank 7, and water inlet pipe 6 is provided with the water valve 4 of water meter 9 and controlled water flow amount.Water tank 7 sizes are more than or equal to the volume of unconsolidated confined aquifer bag 2, with the water source that guarantees to provide sufficient.Water level pipe 8 is provided with the water level gauge 3 that links to each other with data acquisition unit 5; Water level gauge 3 is driven by float; It is the limnograph that is used for the continuity SEA LEVEL VARIATION; Through float-float cable---Weighting system is transferred to the change of water level on the float pulley of inductor, and rotatablely moving through this system converts water level into electronic signal, with data transmission in external data collector 5.
Unconsolidated confined aquifer of the present invention is adopted the experimental technique of dynamic water level Changing Pattern: adopt cement, lime, gypsum in simulation box 1, to lay simulation coal rock layer 11 from lower to upper earlier; In the process of laying simulation coal rock layer 11; Unconsolidated confined aquifer bag 2 is placed in middle and upper part at simulation coal rock layer 11; And water level pipe 8 is set at a upper lateral part of unconsolidated confined aquifer bag 2, and the side of opposite side connects water inlet pipe 6, and water inlet pipe 6 is connected with the water tank that highly is higher than simulation box 17; Water level gauge 3 is installed at top at water level pipe 8, and water level gauge 3 is connected with data acquisition unit 12; Open water valve 4 water filling in unconsolidated confined aquifer bag 2, stable until water meter 9 video datas, no longer change, write down the reading of water meter this moment; Open the active window at simulation 10 places, coal seam afterwards; According to on-the-spot time similar proportion be that 1:10, size similar proportion are the similar proportion of 1:100; The coal column of 20cm is respectively reserved in simulation coal seam 10 in the simulation mining simulation box 1 in simulation both sides, coal seam, reserve coal column from the right side in simulation coal seam and begin exploitation; Coal column is reserved until exploitation to the left side of simulating the coal seam in per 20 minutes exploitation 10cm simulation coal seams.In this process, simulation can cause covering collapsing of rock stratum of simulation behind the seam mining and fall, thereby the water that makes loose pressure-bearing contain in the water bag flows to this territory of settling in an area of collapsing; Cause decline of water table; Through the SEA LEVEL VARIATION value that data acquisition unit 5 is gathered in the water level pipe 8, every reading, every reading at a distance from a water meter 9 of 60s record at a distance from a water level gauge 3 of 0.5s record; Observe the situation of change of the simulation rock stratum of top, simulation coal seam simultaneously, draw the relation between simulation formation damage degree and the decline of water table speed.
Claims (1)
1. a unconsolidated confined aquifer is adopted the experimental provision of dynamic water level Changing Pattern; Comprise data acquisition unit (5); It is characterized in that: the simulation box (1) that the simulation coal rock layer is housed in this device; In the simulation rock stratum on simulation box (1) top, be provided with unconsolidated confined aquifer bag (2), a upper lateral part of unconsolidated confined aquifer bag (2) is provided with and stretches out the outside water level pipe (8) of simulation box (1), and opposite side is provided with and stretches out the outside water inlet pipe (6) that is connected with water tank (7) of simulation box (1); Water level pipe (8) is provided with the water level gauge (3) that links to each other with data acquisition unit (5).
2. unconsolidated confined aquifer according to claim 1 is adopted the experimental provision of dynamic water level Changing Pattern, it is characterized in that, said water inlet pipe (6) is provided with the water valve (4) of water meter (9) and controlled water flow amount.
3. unconsolidated confined aquifer according to claim 1 is adopted the experimental provision of dynamic water level Changing Pattern, it is characterized in that, active window is located to be provided with in the simulation coal seam (10) of described simulation box (1) bottom.
4. unconsolidated confined aquifer according to claim 1 is adopted the experimental provision of dynamic water level Changing Pattern, it is characterized in that: described unconsolidated confined aquifer bag (2) by the sealed water bag and the sealed water bag interior diameter of packing into be 1cm sand grains with add in the sealed water bag with sand quality number percent be that 30% water constitutes.
5. a unconsolidated confined aquifer is adopted the experimental technique of dynamic water level Changing Pattern, it is characterized in that comprising the steps:
A. adopt cement, lime, gypsum in simulation box (1), to lay the simulation coal rock layer from lower to upper; In the process of laying the simulation coal rock layer; Unconsolidated confined aquifer bag (2) is placed in middle and upper part in simulation rock stratum (11); And water level pipe (8) is set at a upper lateral part of unconsolidated confined aquifer bag (2), and the side of opposite side connects water inlet pipe (6), and water inlet pipe (6) is connected with the water tank that highly is higher than simulation box (1) (7);
B., water level gauge (3) is installed at the top of water level pipe (8), the float of water level gauge (3) is contacted with water in the water level pipe (8), and water level gauge (3) is connected with data acquisition unit (5);
C. open water valve (4) water filling in unconsolidated confined aquifer bag (2), stable until water meter (9) video data, write down the reading of water meter at this moment;
D. open the active window that simulation coal seam (10) is located; Simulation coal seam (10) in the simulation mining simulation box (1); Gather the SEA LEVEL VARIATION value in the water level pipe (8) through data acquisition unit (5) simultaneously, every reading, every reading at a distance from 60s record water meter (9) at a distance from 0.5s record water level gauge (3); Observe the situation of change of the simulation rock stratum of top, simulation coal seam simultaneously, draw the relation between simulation formation damage degree and the decline of water table speed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110100723A CN102261942B (en) | 2011-04-21 | 2011-04-21 | Experimental apparatus and method for change rule of mining water level of unconsolidated confined aquifer |
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| CN201110100723A CN102261942B (en) | 2011-04-21 | 2011-04-21 | Experimental apparatus and method for change rule of mining water level of unconsolidated confined aquifer |
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| CN102261942B true CN102261942B (en) | 2012-10-24 |
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| CN102608289A (en) * | 2012-01-19 | 2012-07-25 | 淮南联合大学 | Test simulation device for confined aquifer |
| CN105116116B (en) * | 2015-10-12 | 2016-07-06 | 中国矿业大学(北京) | Coal mining analogue experiment installation |
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| CN110850059B (en) * | 2019-11-18 | 2022-02-08 | 华北科技学院 | Fluid-solid coupling analog simulation experiment method for confined aquifer |
| CN112067788B (en) * | 2020-09-01 | 2021-07-02 | 安徽建筑大学 | Model test device and method for drainage law of water-bearing stratum at bottom of thick surface soil and thin bedrock |
| CN114002411B (en) * | 2021-11-05 | 2023-07-21 | 中国矿业大学 | Dynamic monitoring system and method for water inflow of coal seam taking coal seam as main aquifer |
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| CN201037819Y (en) * | 2007-04-20 | 2008-03-19 | 中国矿业大学 | Experimental device for loose confined aquifer load transmission action |
| WO2009031101A2 (en) * | 2007-09-04 | 2009-03-12 | Peter Dale Rose | Beneficiation of coal |
| KR20100071523A (en) * | 2008-12-19 | 2010-06-29 | (주)한서엔지니어링 | Water level and quality of water measurement devices of underground water |
| CN202132036U (en) * | 2011-04-21 | 2012-02-01 | 中国矿业大学 | Experimental device for loose bearing aquifer mining water level change rule |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07324964A (en) * | 1994-04-07 | 1995-12-12 | Nobuo Nakayama | Underground water gauge |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201037819Y (en) * | 2007-04-20 | 2008-03-19 | 中国矿业大学 | Experimental device for loose confined aquifer load transmission action |
| WO2009031101A2 (en) * | 2007-09-04 | 2009-03-12 | Peter Dale Rose | Beneficiation of coal |
| KR20100071523A (en) * | 2008-12-19 | 2010-06-29 | (주)한서엔지니어링 | Water level and quality of water measurement devices of underground water |
| CN202132036U (en) * | 2011-04-21 | 2012-02-01 | 中国矿业大学 | Experimental device for loose bearing aquifer mining water level change rule |
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