CN104481542B - Method for solving wind current disorder during diagonal stoping of upper and lower middle empty fields of thick and large ore body - Google Patents
Method for solving wind current disorder during diagonal stoping of upper and lower middle empty fields of thick and large ore body Download PDFInfo
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- CN104481542B CN104481542B CN201410678789.6A CN201410678789A CN104481542B CN 104481542 B CN104481542 B CN 104481542B CN 201410678789 A CN201410678789 A CN 201410678789A CN 104481542 B CN104481542 B CN 104481542B
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- stage casing
- distinguished
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- wind
- stope
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
Abstract
The invention discloses a method for solving the problem of wind current disorder during diagonal stoping of upper and lower middle empty fields of a thick and large ore body, which comprises the following steps: the first step is as follows: determining a series wind flow route; the second step is that: determining a wind pressure comparison point, selecting two points on the series wind flow line determined in the first step, and determining the specific wind pressures of the two points; the third step: determining measures and equipment for solving the wind flow disorder, and selecting fan energization regulation and/or wind window resistance-increasing regulation according to the magnitude of the wind pressure difference between the two points in the second step; the fourth step: determining the implementation position of a fan or a wind window; and fifthly, selecting the type of the selected equipment and installing the equipment. The ventilation of two stopes at the opposite angles of the upper and lower adjacent middle section spaces is not interfered with each other, the ventilation of the respective ventilation systems is normal, and the stoping work is efficient and safe.
Description
Technical field
The invention belongs to mining technique field, relate to the solution of the distinguished and admirable disorder of stope ventilation, especially relate to a kind of nonferrous metal mine thick big inclined orebody upper and lower stage casing barnyard to the solution of distinguished and admirable disorder during angie type back production.
Background technology
Distinguished and admirable disorder is one of FAQs of Ventilation System existence, mainly show as distinguished and admirable between stage casing with stage casing, stope and stope series connection, especially when big thick ore body upper and lower stage casing barnyard is to angie type back production, easily occur that the dirt of lower stage casing stope is distinguished and admirable and the fresh distinguished and admirable phenomenon connected of diagonal angle, upper stage casing stope.
When the metal mine that more than orebody thickness 80m, more than 60 ° of inclination angle and country rock are firm uses openstope method exploitation, in the middle part of orebody trend, horizontal ore pillar is reserved in each stage casing, and vertically ore body reserves studding, stope is divided with this, the stope layout pattern in final each stage casing is similar to sphere of movements for the elephants type, as shown in Figure 1.For ensureing the production capacity of stope, it is to avoid rock mass stress redistribution, two stopes on back production diagonal while of successively.Stope ventilation route is: stage main haulage roadway-ventilation pedestrain raise-drilling drift-stope-big lane of returnairshaft-return air.In the level of the end, the top handing-over being in two stopes of diagonal angle, space pattern in upper and lower stage casing, lower stage casing stope dirt wind is connected with fresh distinguished and admirable being susceptible to of the stope in upper stage casing, stage casing Stope face can be caused contaminated or lower stage casing stope return air is obstructed, thus cause upper and lower two stope mining face-airings the most smooth, not only personnel health is on the hazard, and mining activity is obstructed.
Dig the Special back air channel of necessary amount and return air raise, or use effective Wind current decontamination plant, in some situation and connect and play a role to a certain extent to solving distinguished and admirable disorderly dirty wind.But when big thick ore body upper and lower stage casing barnyard is to angie type back production, digs Special back air channel and return air raise not only mining cost increases, mining cycle stretch-out, and the utilization rate of this engineering is the highest；Use Wind current decontamination plant fundamentally can not change wind direction.
Summary of the invention
It is an object of the invention to provide a kind of big thick ore body upper and lower stage casing barnyard that solves to the method for distinguished and admirable disorder during angie type back production, during to solve big thick ore body upper and lower stage casing diagonal angle stope mining, dirty wind and fresh distinguished and admirable because of blast, and produce the problem of distinguished and admirable disorder, it also avoid simultaneously and dig the problems such as Special back air channel and return air raise or the high cost using the technical measures such as Wind current decontamination plant to bring, poor efficiency and on-the-spot adaptation ability.
The technical solution adopted in the present invention is: a kind of big thick ore body upper and lower stage casing barnyard that solves is to the method for distinguished and admirable disorder during angie type back production, ore body is big thick ore body, use openstope method, the stope layout pattern in each stage casing is sphere of movements for the elephants type, two stopes in the upper and lower stage casing of back production sphere of movements for the elephants type diagonal simultaneously, its feature comprises the steps.
The first step: determine distinguished and admirable disorderly circuit.In the stope of upper stage casing, staff finds, when blasting fume exists or detects that fresh wind is polluted by dirty wind by instrument, just to can determine that this stope exists distinguished and admirable disorderly problem.Detection lower stage casing dirt wind blast, the fresh distinguished and admirable blast in upper stage casing, if lower stage casing dirt wind blast is more than the fresh distinguished and admirable blast in upper stage casing, then there will be the fresh wind direction in stage casing flowing on lower stage casing dirt wind direction；Otherwise, then there will be stage casing fresh distinguished and admirable downward stage casing dirt wind wind direction flowing.By comparing above, a distinguished and admirable disorderly circuit just can be found.
Second step: determine joint.Can determine that the distinguished and admirable circuit of two other stope of matrix pattern also according to the first step, the intersection point on this two lines road is joint.
3rd step: measure wind pressure value size.Choose 2 points on the same distinguished and admirable circuit in both sides of the joint that second step determines, measure the wind pressure value of point-to-point transmission.
4th step: determine the measure solving distinguished and admirable disorder.According to the leeway size of the 3rd step point-to-point transmission, air regulator or blower fan is selected to increase resistance regulation.
5th step: determine the enforcing location of air regulator or blower fan.Choosing a bit on disturbance wind Flow Line, this some requirement is implementing measure easy construction, does not affect normal ore removal hauling operation.
6th step: the enforcement of measure and construction.Calculating according to flowing resistance law, the wind pressure value fixed with the 3rd pacing is checked, and determines implementing measure, then carries out constructing in the 5th step defined location.
The innovative point of the present invention: the ventilation of two stopes in diagonal angle, upper and lower stage casing no longer interferes with each other, and respective ventilation routes is smooth and easy, and actual mining is normally carried out；Circuit Ex post does not interferes with normal ore removal hauling operation, it is possible to ensure the production capacity of stope；The problem simultaneously also solving two other the distinguished and admirable disorder of diagonal angle stope of sphere of movements for the elephants type.
Accompanying drawing explanation
Fig. 1 is that schematic diagram arranged by upper and lower stage casing sphere of movements for the elephants type stope；
Fig. 2 is that upper and lower stage casing barnyard is to stope ventilation schematic diagram during angie type back production；
Midcourse phase main haulage roadway under 1-in figure, ventilation pedestrain raise in stage casing under 2-, stage casing drilling drift under 3-, stage casing returnairshaft under 4-, the big lane of 5-return air, 6-upper midcourse phase main haulage roadway, 7-upper stage casing ventilation pedestrain raise, 8-upper stage casing drilling drift, 9-upper stage casing returnairshaft, the horizontal ore pillar of 10-.
Detailed description of the invention
The invention will be further described with implementing example below in conjunction with the accompanying drawings.
Dug up mine body is big thick ore body, uses openstope method, and the stope layout pattern in each stage casing is sphere of movements for the elephants type, simultaneously two stopes in the upper and lower stage casing of back production sphere of movements for the elephants type diagonal.The lower stage casing 2 distinguished and admirable circuit of stope is: fresh distinguished and admirable through lower midcourse phase main haulage roadway 1 → lower stage casing ventilation pedestrain raise 2 → lower stage casing drilling drift 3 → stope → big lane of returnairshaft 4 → return air, lower stage casing 5；The upper stage casing 1 distinguished and admirable circuit of stope is: fresh distinguished and admirable not shown through upper midcourse phase main haulage roadway 6 → upper stage casing ventilation pedestrain raise 7 → upper stage casing drilling drift 8 → stope → upper big lane of returnairshaft 9(1 stope return air, stage casing).Owing to the lower stage casing returnairshaft 4 of No. 2 stopes communicates with No. 1 stope main haulage roadway, in the lower stage casing returnairshaft 4 of No. 2 stopes dirty wind easily in " ten " font ore pillar tunnel flow into No. 1 stope, that pollutes in No. 1 stope is fresh distinguished and admirable.
The first step: determine distinguished and admirable disorderly circuit.In the stope of upper stage casing, staff finds, when blasting fume exists or detects that fresh wind is polluted by dirty wind by instrument, just to can determine that this stope exists distinguished and admirable disorderly problem.Detection lower stage casing dirt wind blast, the fresh distinguished and admirable blast in upper stage casing, if lower stage casing dirt wind blast is more than the fresh distinguished and admirable blast in upper stage casing, then there will be the fresh wind direction in stage casing flowing on lower stage casing dirt wind direction；Otherwise, then there will be stage casing fresh distinguished and admirable downward stage casing dirt wind wind direction flowing.By comparing above, a distinguished and admirable disorderly circuit just can be found.
As in figure 2 it is shown, after distinguished and admirable disorderly problem occurs, determine that distinguished and admirable disorderly circuit is: A → B → O → C → D.
Second step: determine joint.Can determine that the distinguished and admirable circuit of two other stope of matrix pattern also according to the first step, the intersection point on this two lines road is joint.
3rd step: measure wind pressure value size.Choose 2 points on the same distinguished and admirable circuit in both sides of the joint determined at second step, as in figure 2 it is shown, be No. 2 stope return air raise 4 pithead positions and No. 1 stope ventilation pedestrain raise 7 bottom hole location, measure the wind pressure value of A, D point-to-point transmission at determine two.
4th step: determine the measure solving distinguished and admirable disorder.According to the leeway size of the 3rd step point-to-point transmission, air regulator or blower fan is selected to increase resistance regulation.According to on-the-spot actual and combine associated specifications, it is considered to arranging air regulator or booster on distinguished and admirable disorderly circuit and arrange with the dirty distinguished and admirable rightabout of wind and realize increasing resistance, the two selects one.The leeway that foundation is the point-to-point transmission that the 3rd step determines of resistance is increased with air regulator or booster.This problem is selected booster as regulation measure of blast between A, D at 2.
5th step: determine the enforcing location of blower fan.Choosing a bit on disturbance wind Flow Line, this some requirement is implementing measure easy construction, does not affect normal ore removal hauling operation.
The enforcing location of the blower fan determined in this figure appropriate location on the left of O point.The direction of blower fan air-out is changed when two stope minings at another diagonal angle.
6th step: the enforcement of measure and construction.Calculate according to flowing resistance law, determine implementing measure, then carry out constructing in the 5th step defined location.
Under conditions of distinguished and admirable disorder, according to Mine Ventilation Resistances law, acting on the leeway between A, D is:
H1 =
R*Q1 2
(1)
In formula: H1Leeway between A, D, Pa；
Q1Air quantity between A, D, m3/ s ；
Windage between R A, D, N S2/ m8；
When setting up the resistance of an XR at O point, then have:
H= (XR+R)*Q1 2
(2)
By (1) formula substitution (2) Shi Ke get:
H/(X+1)=H1
(3)
Or set a forced blower fan at O point, its blast size be the pressure reduction of H/ (X+1), O point be H, air quantity is Q, then have:
H+ H/(X+1) =
(XR+R)*Q2 (4)
Due to H=R*Q2, substitute into (4) formula abbreviation and obtain: X2+ X-1=0, solves X=0.618, and (4) formula of substitution obtains:
H+ H/1.618 =
1.618R*Q2(5)
In formula: H distinguished and admirable disorderly time leeway between A, D 2, Pa；
Air quantity required between Q A, D two, m3/ s；
R distinguished and admirable disorderly time windage between A, D 2, N S2/ m8；
The windage that 0.618 R O point increases.
According to (5) formula, the wind pressure value of booster can be calculated according to windage when not taking measures, air quantity, select the model of booster in conjunction with Air Quantity Required.If the 4th step determines selection air regulator, the area of regulation wind window can be determined simultaneously according to 1.618 R, determine the enforcing location of air regulator according to the 5th step.
Claims (3)
1. one kind solves big thick ore body upper and lower stage casing barnyard to the method for distinguished and admirable disorder during angie type back production, ore body is big thick ore body, use openstope method, the stope layout pattern in each stage casing is sphere of movements for the elephants type, two stopes in the upper and lower stage casing of back production sphere of movements for the elephants type diagonal simultaneously, its feature comprises the steps:
The first step: determine distinguished and admirable disorderly circuit, in the stope of upper stage casing, staff finds, when blasting fume exists or detects that fresh wind is polluted by dirty wind by instrument, just to can determine that this stope exists distinguished and admirable disorderly problem；
Detection lower stage casing dirt wind blast, the fresh distinguished and admirable blast in upper stage casing, if lower stage casing dirt wind blast is more than the fresh distinguished and admirable blast in upper stage casing, then there will be the fresh wind direction in stage casing flowing on lower stage casing dirt wind direction；Otherwise, then there will be stage casing fresh distinguished and admirable downward stage casing dirt wind wind direction flowing；
By comparing above, a distinguished and admirable disorderly circuit just can be found；
Second step: determine joint, can determine that the distinguished and admirable circuit of two other stope of matrix pattern also according to the first step, and the intersection point on this two lines road is joint；
3rd step: measure wind pressure value size, the same distinguished and admirable circuit in both sides of the joint determined at second step is chosen 2 points, measures the wind pressure value of point-to-point transmission, and makees difference and draw the leeway of point-to-point transmission；
4th step: determine the measure solving distinguished and admirable disorder, according to the leeway size of the 3rd step point-to-point transmission, selects air regulator or blower fan to increase resistance regulation；
5th step: determine the enforcing location of air regulator or blower fan, chooses a bit on distinguished and admirable disorderly circuit, and this some requirement is implementing measure easy construction, does not affect normal ore removal hauling operation；
6th step: the enforcement of measure and construction；Calculate according to flowing resistance law, determine implementing measure, then carry out constructing in the 5th step defined location.
2. the as claimed in claim 1 big thick ore body upper and lower stage casing barnyard that solves is to the method for distinguished and admirable disorder during angie type back production, it is characterized in that described in the 3rd step stage casing stope return air raise pithead position and diagonal angle, upper stage casing stope downcast bottom hole location under two point selection.
3. the as claimed in claim 1 big thick ore body upper and lower stage casing barnyard that solves is to the method for distinguished and admirable disorder during angie type back production, it is characterized in that the enforcing location of the 5th step blower fan or the air regulator intersection in cross tunnel, the joint that i.e. second step determines.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410678789.6A CN104481542B (en) | 2014-11-24 | 2014-11-24 | Method for solving wind current disorder during diagonal stoping of upper and lower middle empty fields of thick and large ore body |
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| CN201410678789.6A CN104481542B (en) | 2014-11-24 | 2014-11-24 | Method for solving wind current disorder during diagonal stoping of upper and lower middle empty fields of thick and large ore body |
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| CN104481542A CN104481542A (en) | 2015-04-01 |
| CN104481542B true CN104481542B (en) | 2016-09-21 |
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| RU2642721C1 (en) * | 2017-03-06 | 2018-01-25 | Акционерное общество "ВНИИ Галургии" (АО "ВНИИ Галургии") | Method of processing of a cutting site |
| CN110905512B (en) * | 2019-11-22 | 2021-11-16 | 西北矿冶研究院 | Open stope mining method for gently inclined medium-thickness ore body |
Citations (4)
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|---|---|---|---|---|
| US3707307A (en) * | 1970-12-11 | 1972-12-26 | Harry Kristoffersson | Methods in mining by sublevel caving |
| US4512610A (en) * | 1983-05-27 | 1985-04-23 | Mobil Oil Corporation | Mining system |
| CN101469612A (en) * | 2007-12-26 | 2009-07-01 | 孙世超 | Mining method for segmented metallic ore |
| CN101566062A (en) * | 2009-06-07 | 2009-10-28 | 姜仁义 | Caving mining method cap comminution granulation |
-
2014
- 2014-11-24 CN CN201410678789.6A patent/CN104481542B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3707307A (en) * | 1970-12-11 | 1972-12-26 | Harry Kristoffersson | Methods in mining by sublevel caving |
| US4512610A (en) * | 1983-05-27 | 1985-04-23 | Mobil Oil Corporation | Mining system |
| CN101469612A (en) * | 2007-12-26 | 2009-07-01 | 孙世超 | Mining method for segmented metallic ore |
| CN101566062A (en) * | 2009-06-07 | 2009-10-28 | 姜仁义 | Caving mining method cap comminution granulation |
Non-Patent Citations (1)
| Title |
|---|
| 提高通风网风流稳定性防止风流反向;王英敏;《冶金安全》;19760331(第3期);第28-第34页 * |
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