CN105569708A - Ventilation design method for controlling seepage of radon generated by blasting uranium ore heap in stope - Google Patents
Ventilation design method for controlling seepage of radon generated by blasting uranium ore heap in stope Download PDFInfo
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- CN105569708A CN105569708A CN201610012869.7A CN201610012869A CN105569708A CN 105569708 A CN105569708 A CN 105569708A CN 201610012869 A CN201610012869 A CN 201610012869A CN 105569708 A CN105569708 A CN 105569708A
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- 229910052704 radon Inorganic materials 0.000 title claims abstract description 75
- SYUHGPGVQRZVTB-UHFFFAOYSA-N radon atom Chemical compound [Rn] SYUHGPGVQRZVTB-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 73
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000013461 design Methods 0.000 title claims abstract description 23
- 238000009423 ventilation Methods 0.000 title abstract description 41
- 238000005422 blasting Methods 0.000 title abstract 2
- 238000001556 precipitation Methods 0.000 claims abstract description 19
- 230000001276 controlling effect Effects 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 238000004880 explosion Methods 0.000 claims description 58
- 230000009467 reduction Effects 0.000 claims description 57
- 230000033228 biological regulation Effects 0.000 claims description 38
- 238000009412 basement excavation Methods 0.000 claims description 20
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 238000005065 mining Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/10—Air doors
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a ventilation design method for controlling the seepage of radon generated by a blasting uranium ore heap in a stope. The ventilation design method comprises the following steps: enabling the seepage velocity of gas in the ore heap to be close to zero through regulating and controlling the gas static pressure difference between a mining space at the upper part of the ore heap and an along-vein transportation roadway where a lower hopper is positioned; minimizing the seepage precipitation amount of the radon generated by the ore heap. Therefore, according to the ventilation design method disclosed by the invention, the seepage velocity in the ore heap is guaranteed to be close to zero, and the seepage precipitation amount of the radon generated by the ore heap is minimized; under the situation of ensuring that the ventilation quality of a stope operation space reaches the standard, the ventilation rate and the ventilation energy consumption of the stope are reduced, and the release quantity of radon in a whole mine to an external environment is reduced.
Description
Technical field
The present invention relates to a kind of method for designing of mine ventilation system, be applicable to the Ventilation In Uranium Mines system containing explosion uranium ore heap stope.
Background technology
In uranium mining, there is the ore storage of the explosion uranium ore accumulation with certain lumpiness size in mine stope, explosion uranium ore clitter is one of main source of stope air radon.For shrinkage stoping, it is that uranium mine uses the earliest, and one of more mining methods, belong to barnyard stope method.Be characterized in nugget being divided into mineral building and ore pillar Two step mining, mineral building is slicing from bottom to top, the shrink of workman directly under exposure pile above operation.For the uranium mine using shrinkage stoping, ore temporary in mineral building is more, the permeability of ore storage is better, the exposed area of ore is larger, the time of stacking is also long, other mining methods that the radon gas of separating out within the unit interval is applied than current uranium mine are all many, thus make the health of workman be subject to great harm.
In existing uranium mine Ventilating Design Method, in order to make the ventilation quality of uranium ore Underground working site be up to state standards, the general method adopting stronger ventilation air quantity or force pump drainage ore deposit heap generation radon.At present, statistics obtains the total ventilation of uranium ore about than coloured and metallurgical system mine height 5-8 times, and uranium mine ventilation cost accounts for about 15% of total uranium ore cost of production.This stronger ventilation air quantity or the method for forcing pump drainage ore deposit heap to produce radon can not meet the requirement of energy-saving and emission-reduction, be necessary under the prerequisite of satisfied ventilation quality requirement for this reason, design a kind of new Ventilating Design Method, reduce stope Radon eduction amount, the ventilation cost of mine and the whole uranium mine radon release amount to external environment as far as possible.
Summary of the invention
The object of the invention is controlling the deficiency in stope explosion uranium ore heap in radon seepage flow to solve existing uranium mine method of ventilation, a kind of Ventilating Design Method controlling radon seepage flow in uranium ore stope explosion uranium ore heap is provided.
Another object of the present invention is by this Ventilating Design Method, the draught head of regulation and control explosion uranium ore heap upper and lower surface, gas flow speed in the heap of ore deposit is close to zero, minimize ore deposit heap produce amount of precipitation from radon to stope working space, reduce stope ventilation air quantity, and then reduce ventilation cost and the mine radon release amount to external environment.
For achieving the above object, technical scheme of the present invention is:
A kind of mine ventilation system controlling shrinkage stoping stope explosion uranium ore heap radon seepage flow comprises, and air pressure and temperature pick up (3), pressure reduction regulate and control air door (5),
Regulate and control air door (5) at the pressure reduction of transportation roadway (9) left position installation along the pulse, the position A point corresponding with heap top, ore deposit excavation at transportation roadway air door right side gas flows settling position B point along the pulse installs air pressure and temperature pick up (3).
When adopting downward ventilation mode maybe when adopting ascensional ventilation mode, pressure reduction is regulated and controled air door (5) and be installed on transportation roadway (9) left end B position along the pulse, pressure reduction regulation and control air door (5) height is consistent with the height of transportation roadway (9) along the pulse, bottom this pressure reduction regulation and control air door, air door guide rail (34) is housed, facilitates pressure reduction to regulate and control air door (5) mobile;
Air door storage spacing (31) that one is greater than pressure reduction regulation and control air door volume is dug in the rock mass of pressure reduction regulation and control air door (5) side, need when transportation roadway (9) operation along the pulse with box lunch, pressure reduction is regulated and controled air door (5) to be advanced in this space, ensure the unimpeded of transportation roadway (9) along the pulse
A high-voltage line preset slot (310) is opened in the localities at pressure reduction regulation and control air door and the same height of high-voltage line, and will around the gap of this high-voltage line preset slot, adopt electro-insulating rubber layer (311) to wrap up, move the inconvenience brought to this air door to avoid transportation roadway (9) top high-voltage line along the pulse.
1, when mine uses ascensional ventilation mode, the pressure reduction of explosion uranium ore heap (12) upper and lower surface
adjusted design method as follows:
The precipitation of stope radon mainly comes from mineral building top board protolith exposure, ore storage and inlet air air-flow, and increasing along with explosion ore amount, and the radon amount proportion from ore storage is also larger.In ore storage, the precipitation of radon follows seepage flow in pourable medium and diffusive migration is theoretical.Because explosion uranium ore pore communication is good and porosity comparatively large (about 0.33), under the effect of draft, the migration of gas flow to radon in the explosion uranium ore heap that flowing resistance causes plays a leading role.According to gas flow speed design formulas:
（1）
In formula,
seepage velocity, unit m/s; K is the permeability of medium, unit m
2; P is the pressure of gas, unit Pa; μ is the coefficient of dynamic viscosity of gas, unit Pa
s;
for the averag density of air, units/kg/m
3.
In formula (1),
for the barometric gradient of gas in explosion uranium ore heap.When the gas-static difference of explosion uranium ore heap upper and lower surface is
, ore deposit stack height is
, then along the barometric gradient of gravity direction
.If can control
, namely
, then the seepage velocity in explosion uranium ore heap is zero.
(1) before pressure reduction regulation and control air door is installed:
The flowing resistance of mine laneway can be calculated as follows:
（2）
In formula,
for flowing resistance, unit Pa;
for on-way resistance, unit Pa;
for local resistance, unit Pa; S is the equivalent cross-section area in tunnel, unit m
2; P is the equivalent perimeter in tunnel, unit m;
for the density of air, units/kg/m
3;
for coefficient of frictional resistance, unit
;
for coefficient of partial resistance, zero dimension.
Known from above formula, pressure reduction regulation and control air door is not installed, distinguished and admirable in flow process in mine laneway, there is the energy loss that on-way resistance and local resistance etc. cause.Therefore, according to Bernoulli equation, for datum, in Fig. 4, between A point and C point, there is following relation with transportation roadway horizontal axis 0-0 along the pulse:
（3）
In formula,
for the flowing resistance between C point and A point, unit Pa;
for the pressure of C point, unit Pa;
for stope atmospheric density, units/kg/m
3;
for the air velocity of C point, unit m/s;
for the plumb height that C point take 0-0 as datum, unit m;
for the pressure of A point, unit Pa;
for the air velocity of A point, unit m/s;
for the plumb height that A point take 0-0 as datum, unit m;
for acceleration of gravity, unit m/s2.
Because stope ventilation air quantity is 6 ~ 8m
3/ s, vent (-escape) raise and drift section air velocity less, therefore
with
can ignore (following identical), in Fig. 4, the pressure reduction of C point and A 2 presses following formula estimation:
（4）
In formula,
for the vertical height between 0-0 horizontal axis and 2-2 horizontal axis, determined by the digging manufacturing schedule of stope, unit m.
Due to
, the therefore pressure reduction of B point and A point in Fig. 4
.It can thus be appreciated that, due to mine resistance
existence, cause the pressure reduction of BA 2
, there is the radon seepage flow that soffit flows to upper surface direction during explosion uranium ore will be caused to pile in this.
(2) after pressure reduction regulation and control air door is installed:
According to Bernoulli equation, between A point and D point, there is following relation:
（5）
In formula,
for the vertical height that A point take 0-0 as datum, unit m;
for the flowing resistance between A point and D point, unit Pa;
for the pressure of A point, unit Pa;
for the air velocity of D point, unit m/s.
Following relation is there is between B point and D point:
（6）
In formula,
for the vertical height that B point take 0-0 as datum, unit m;
for the flowing resistance between B point and D point, unit Pa;
for the pressure of B point, unit Pa;
for the air velocity of B point, unit m/s.
According to formula (5) and formula (6) known,
（7）
Ignore
, then formula (7) becomes:
（8）
When close completely with pressure reduction regulation and control air door along the pulse transportation roadway time, almost calmly in transportation roadway along the pulse to flow through.Now
value is close to zero,
value is much larger than zero.It is known according to formula (8),
, namely there is the radon seepage flow flowing to soffit from upper surface in explosion uranium ore heap.
Now, pressure reduction is regulated and controled air door and opens, then
value will increase gradually,
to reduce gradually.Known according to formula (8), when pressure reduction regulation and control air door is opened to suitable aperture, controllable excavation A point and the pressure reduction along the pulse between transportation roadway B point
.Now, radon seepage flow between the upper and lower surfaces will do not deposited in explosion uranium ore heap.
2, when mine uses downward ventilation mode, the pressure difference value of explosion uranium ore heap upper and lower surface
control method as follows:
(3) before pressure reduction regulation and control air door is installed:
Select transportation roadway horizontal axis 0-0 to be along the pulse datum, according to Bernoulli equation, in Fig. 6, between A point and C point, there is following relation:
（9）
In formula,
for the flowing resistance of AC point-to-point transmission, unit Pa;
for the pressure of C point, unit Pa;
for atmospheric density, units/kg/m
3;
for the air velocity of C point, unit m/s;
for the vertical height that C point take 0-0 as datum, unit m;
for the pressure of A point, unit Pa;
for the air velocity of A point, unit m/s;
for the plumb height that C point take 0-0 as datum, unit m;
for acceleration of gravity, unit m/s2.
Ignore
with
, in Fig. 6, the pressure reduction of A and C 2 can be estimated by following formula:
（10）
In formula,
for the vertical height between 0-0 horizontal axis and 2-2 horizontal axis, determined by the digging manufacturing schedule of stope, unit m.
Due to
, i.e. the pressure reduction of BA point-to-point transmission
.It can thus be appreciated that, due to mine resistance
existence, cause the pressure reduction of BA 2
, this will cause at explosion uranium ore heap memory at the radon seepage flow flowing to soffit from upper surface.
(4) after pressure reduction regulation and control air door is installed:
According to Bernoulli equation, in Fig. 7, between A point and D point, there is following relation:
（11）
In formula,
for the flowing resistance between D point and A point, unit Pa.
Following relation is there is between B point and D point:
（12）
In formula,
for the flowing resistance between D point and A point, unit Pa.
According to formula (11) and formula (12) known,
（13）
Ignore
, then formula (13) becomes:
（14）
When use pressure reduction regulation and control air door close completely along the pulse transportation roadway time,
be worth close to zero,
be worth much larger than zero, now from formula (14),
, namely explosion uranium ore heap memory is flowing to the radon seepage flow of soffit from upper surface.
If open the certain aperture of pressure reduction regulation and control air door, now,
value will increase gradually from zero,
to reduce gradually.Known according to formula (14), controllable excavation A point and the pressure reduction along the pulse between transportation roadway B point
.Now, the radon seepage flow between upper and lower surface will do not deposited in explosion uranium ore heap.
3, reduce the explosion ore deposit heap amount of precipitation of radon and ventilation volume, and then the design theory reducing the ventilation cost of mine and the whole uranium mine outwardly radon release amount of environment is as follows:
Explosion uranium ore is piled surperficial precipitation rate of radon and is comprised seepage flow eduction rate and diffusional precipitation rate two parts, design formulas:
（15）
In formula,
that explosion uranium ore piles surperficial precipitation rate of radon, unit
;
for the barometric gradient of gas in explosion uranium ore heap,
explosion uranium ore heap diffusion into the surface precipitation rate of radon, unit Bq/ (ms);
for explosion uranium ore heap hole radon consistence gradient,
that explosion uranium ore piles surperficial seepage flow precipitation rate of radon, unit Bq/ (m
2s);
for the porosity of medium; D is the diffusion coefficient of explosion uranium ore heap radon;
explosion uranium ore heap hole radon consistence, unit Bq/m
3;
When explosion uranium ore heap upper and lower surface draught head is
time,
.Then formula (15) becomes:
（16）
Stope Radon eduction amount comprises inlet air and brings radon amount, protolith exposure precipitation radon amount and ore deposit heap precipitation radon amount into.In order to ensure stope operating environment radiation safety, must ensure that air draft radon consistence is no more than radon consistence controlling value.Stope row radon ventilation design formulas:
（17）
In formula,
for stope required airflow, unit m
3/ s;
for stope Radon eduction amount, unit kBq/s;
for stope radon consistence limit value, 2.7kBq/m
3;
for stope inlet air radon consistence, unit kBq/m
3.
In the regular period, the exposed area of explosion uranium ore heap is certain, and owing to controlling the seepage flow Radon eduction amount of ore deposit heap, ore deposit heap is separated out radon amount and will significantly be reduced, and radon amount separated out by stope
also will significantly reduce.According to formula (17), under the prerequisite ensureing mine ventilation mass conservation, namely (
) remain unchanged, then stope required airflow
also will significantly reduce.
Beneficial effect
The method for designing of the mine ventilation system of this control shrinkage stoping stope explosion uranium ore heap radon seepage flow, is equally also suitable for the design of local fan pressure regulation control radon.The method can guarantee that the seepage velocity in the heap of ore deposit is close to zero, and minimize the radon of ore deposit heap generation by the amount of precipitation of seepage flow to stope working space, in reduction Underground working site, radon is to the harm of operating personnel.
By the method for designing of the mine ventilation system of this control shrinkage stoping stope explosion uranium ore heap radon seepage flow, decrease required ventilation and ventilation energy consumption when stope meets ventilation quality requirement, there is certain economic benefit.
By the method for designing of the mine ventilation system of this control shrinkage stoping stope explosion uranium ore heap radon seepage flow, decrease the radon consistence value in exhaust airflow, reduce the radon release amount of whole mine outwardly surrounding air, thus decrease the radiation hazradial bundle that mine row radon causes air draft well surrounding environment.
Accompanying drawing explanation
Fig. 1 is a kind of downward ventilation method schematic diagram controlling stope explosion uranium ore heap radon seepage flow,
Fig. 2 is a kind of ascensional ventilation method schematic diagram controlling stope explosion uranium ore heap radon seepage flow,
In Fig. 1-Fig. 2,1-return airway; 2-excavation; 3-air pressure and temperature pick up; 4-retains ore; 5-pressure reduction regulation and control air door; 6-air pressure and temperature pick up; 7-foundation; 8-funnel; 9-is transportation roadway along the pulse; 10-does not dig up mine stone; 11-People's Bank of China ventilating shaft,
Fig. 3 is the method for designing schematic diagram of a kind of pressure reduction regulation and control air door,
In Fig. 3,31-air door storage spacing; 5-pressure reduction regulation and control air door; 33-air door guide rail; 34-air door roller; 35-throttle lever; 9-is transportation roadway along the pulse; 37-is transportation roadway country rock along the pulse; 38-air door closure seam; 39-high-voltage line; 310-high-voltage line preset slot; 311-electro-insulating rubber layer;
Fig. 4 install pressure reduction regulation and control air door before stope ascensional ventilation schematic diagram,
In Fig. 4,2-excavation; 9-is transportation roadway along the pulse; 12-explosion uranium ore is piled,
Fig. 5 install pressure reduction regulation and control air door after stope ascensional ventilation schematic diagram,
In Fig. 5,2-excavation; 9-is transportation roadway along the pulse; 12-explosion uranium ore is piled; 5-pressure reduction regulation and control air door,
Fig. 6 install pressure reduction regulation and control air door before stope downward ventilation schematic diagram,
In Fig. 6,2-excavation; 9-is transportation roadway along the pulse; 12-explosion uranium ore is piled,
Fig. 7 install pressure reduction regulation and control air door after stope downward ventilation schematic diagram,
In Fig. 7,2-excavation; 9-is transportation roadway along the pulse; 12-explosion uranium ore is piled; 5-pressure reduction regulation and control air door.
Detailed description of the invention
Control a Ventilating Design Method for uranium mine stope explosion uranium ore heap radon seepage flow, detailed process is as follows:
The first step, regulates and controls air door (5) and is installed on transportation roadway (9) B point left position place along the pulse by pressure reduction, pressure reduction regulation and control air door (5) height is consistent with the height of transportation roadway (9) along the pulse,
Second step, installs air pressure and temperature pick up (3), for monitoring the atmospheric pressure P of A point at the A point of excavation unstable airflow
1with gas temperature t
1,
3rd step, at pressure reduction regulation and control air door (5) right side position B point layout air pressure corresponding with A point and temperature pick up, for monitoring the atmospheric pressure P of B point
2with gas temperature t
2,
4th step, according to A point gas temperature t
1with B point gas temperature t
2, the average temperature obtaining air between A point and B point is t=(t
1+ t
2)/2, obtain the density that temperature is the saturated moist air of t
,
5th step, according to the digging manufacturing schedule of excavation (2), draws the vertical height of A point and B point
,
6th step, regulates the aperture of pressure reduction regulation and control air door, changes the atmospheric pressure of B point and A point, the atmospheric pressure registration P of monitoring A point
1with the atmospheric pressure registration P of B point
2, until P
2-P
1≈
, thus the radon seepage velocity in the heap of ore deposit is close to zero, and starts excavation operation,
7th step, after excavation operation, withdraws from operating personnel in excavation, open pressure reduction regulation and control air door completely, advanced in air door storage spacing (31) of its side, start ore drawing operation, after the ore drawing end of job, then regulate pressure reduction to regulate and control the aperture of air door, change B point atmospheric pressure P
2with the atmospheric pressure P of A point
1, make P
2-P
1≈
, restart the operation of excavation.
Claims (5)
1. control a Ventilating Design Method for stope explosion uranium ore heap radon seepage flow, the draught head of regulation and control explosion uranium ore heap upper and lower surface, the gas flow speed in the heap of ore deposit is close to zero, and it is characterized in that, concrete steps are as follows:
The first step, regulates and controls air door (5) and is installed on transportation roadway (9) B point left position place along the pulse by pressure reduction, pressure reduction regulation and control air door (5) height is consistent with the height of transportation roadway (9) along the pulse,
Second step, installs air pressure and temperature pick up (3), for monitoring the atmospheric pressure P of A point at the A point of excavation unstable airflow
1with gas temperature t
1,
3rd step, at pressure reduction regulation and control air door (5) right side position B point layout air pressure corresponding with A point and temperature pick up, for monitoring the atmospheric pressure P of B point
2with gas temperature t
2,
4th step, according to A point gas temperature t
1with B point gas temperature t
2, the average temperature obtaining air between A point and B point is t=(t
1+ t
2)/2, obtain the density that temperature is the saturated moist air of t
,
5th step, according to the digging manufacturing schedule of excavation (2), draws the vertical height of A point and B point
,
6th step, regulates the aperture of pressure reduction regulation and control air door, changes the atmospheric pressure of B point and A point, the atmospheric pressure registration P of monitoring A point
1with the atmospheric pressure registration P of B point
2, until P
2-P
1≈
, thus the radon seepage velocity in the heap of ore deposit is close to zero, and starts excavation operation,
7th step, after excavation operation, withdraws from operating personnel in excavation, open pressure reduction regulation and control air door completely, advanced in air door storage spacing (31) of its side, start ore drawing operation, after the ore drawing end of job, then regulate pressure reduction to regulate and control the aperture of air door, change B point atmospheric pressure P
2with the atmospheric pressure P of A point
1, make P
2-P
1≈
, restart the operation of excavation.
2. a kind of Ventilating Design Method controlling stope explosion uranium ore heap radon seepage flow according to claim 1, is characterized in that, bottom described pressure reduction regulation and control air door, air door guide rail (34) is housed, facilitates pressure reduction to regulate and control air door (5) mobile.
3. a kind of Ventilating Design Method controlling stope explosion uranium ore heap radon seepage flow according to claim 1, it is characterized in that, air door storage spacing (31) that one is greater than pressure reduction regulation and control air door volume is dug in the rock mass of described pressure reduction regulation and control air door (5) side, need when transportation roadway (9) operation along the pulse with box lunch, pressure reduction is regulated and controled air door (5) to be advanced in this space, ensure the unimpeded of transportation roadway (9) along the pulse.
4. a kind of Ventilating Design Method controlling stope explosion uranium ore heap radon seepage flow according to claim 1, it is characterized in that, described pressure reduction regulation and control air door and the same height of high-voltage line open a high-voltage line preset slot (310) in the localities, and will around the gap of this high-voltage line preset slot, adopt electro-insulating rubber layer (311) to wrap up, move the inconvenience brought to this air door to avoid transportation roadway (9) top high-voltage line along the pulse.
5. a kind of Ventilating Design Method controlling stope explosion uranium ore heap radon seepage flow according to claim 1, it is characterized in that, described explosion uranium ore is piled surperficial precipitation rate of radon and is comprised seepage flow eduction rate and diffusional precipitation rate two parts, design formulas:
（15）
In formula,
that explosion uranium ore piles surperficial precipitation rate of radon, unit
;
for the barometric gradient of gas in explosion uranium ore heap,
explosion uranium ore heap diffusion into the surface precipitation rate of radon, unit Bq/ (ms);
for explosion uranium ore heap hole radon consistence gradient,
that explosion uranium ore piles surperficial seepage flow precipitation rate of radon, unit Bq/ (m
2s);
for the porosity of medium; D is the diffusion coefficient of explosion uranium ore heap radon;
explosion uranium ore heap hole radon consistence, unit Bq/m
3;
When explosion uranium ore heap upper and lower surface draught head is
time,
, then formula (15) becomes:
（16）。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798671A (en) * | 2018-06-07 | 2018-11-13 | 南华大学 | A kind of system and method for control underground uranium mine stope explosion uranium ore heap radon seepage flow |
| CN111274722A (en) * | 2020-01-09 | 2020-06-12 | 西安科技大学 | Limited flow pipe method for integrally solving coupling model of mine air grid and goaf flow field |
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| WO2014179573A9 (en) * | 2013-05-01 | 2015-03-12 | University Of Kentucky Research Foundation | Improvement of the blowing curtain face ventilation system for extended cut mining using passive regulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798671A (en) * | 2018-06-07 | 2018-11-13 | 南华大学 | A kind of system and method for control underground uranium mine stope explosion uranium ore heap radon seepage flow |
| CN111274722A (en) * | 2020-01-09 | 2020-06-12 | 西安科技大学 | Limited flow pipe method for integrally solving coupling model of mine air grid and goaf flow field |
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| Publication number | Publication date |
|---|---|
| CN105569708B (en) | 2017-08-01 |
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