CN110067597A - A kind of mine angle of depression negative pressure visits the method for putting old dead zone ponding - Google Patents
A kind of mine angle of depression negative pressure visits the method for putting old dead zone ponding Download PDFInfo
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- CN110067597A CN110067597A CN201910395802.XA CN201910395802A CN110067597A CN 110067597 A CN110067597 A CN 110067597A CN 201910395802 A CN201910395802 A CN 201910395802A CN 110067597 A CN110067597 A CN 110067597A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 238000005553 drilling Methods 0.000 claims abstract description 26
- 238000010276 construction Methods 0.000 claims abstract description 22
- 238000000605 extraction Methods 0.000 claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000007796 conventional method Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 238000007569 slipcasting Methods 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000011835 investigation Methods 0.000 claims 1
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
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- 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
- E21F16/00—Drainage
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A kind of mine angle of depression negative pressure of the invention visits the method for putting old dead zone ponding, can solve conventional spy and put the method safety poor controllability of old dead zone water and there is technical issues that.The following steps are included: S100, prospecting Test Cycle；S200, the old dead zone water accumulating volume of estimation；S300, leting speeper scheme is formulated；S400, extraction drilling construction；S500, the selection scheme of drawing water are drawn water.Mine angle of depression negative pressure of the invention visits the method for putting old dead zone ponding, construct in advance in tunnel the angle of depression drilling, periphery water in gob area lower than tunnel is carried out visiting in advance to put, since tunnel is located above old dead zone water body, therefore leting speeper process is perfectly safe, and the work that discharges water can carry out in advance, reduce the influence to tunnelling, the process that discharges water is not to fully rely on differential water pressures gravity flow, but by pressing wind apparatus to draw water under negative pressure state, therefore, leting speeper process safety reliability, controllability are stronger.
Description
Technical field
The present invention relates to mine spies to put old dead zone wet hole design and construction field, and in particular to a kind of mine angle of depression is negative
Pressure visits the method for putting old dead zone ponding.
Background technique
Water damage is one of big disaster of mine five.According to statistics, old dead zone water leak accident accounts for the 85% of mine water disaster accident.Accurately
Ground determines old dead zone ponding range, water accumulating volume etc., and it is unrestrained to take technically feasible, safety in operation scheme to carry out, not only
The hidden water dezaster of getting working face can be eliminated in time, guarantee the safe and reliable of leting speeper process, it can also be to a certain extent
Every consuming during old dead zone ponding is unrestrained is reduced, unrestrained water efficiency is improved, reduces the unrestrained water conservancy project phase.
Old dead zone water is put in spy, is usually taken below tunnelling to old dead zone water body, then elevation angle leting speeper drilling of constructing, benefit
Achieve the purpose that discharge water with the differential water pressures between old dead zone water body and tunnel.Since construction tunnel is located at below water body, the elevation angle is visited
The hydraulic pressure that discharges water is big, and safely controllable property is poor, and digging laneway leting speeper execution conditions of meeting head on are poor, deposit in itself in leting speeper operation process
In security threat.It meets head on leting speeper in digging laneway simultaneously, production is taken over and is affected.
Summary of the invention
A kind of mine angle of depression negative pressure proposed by the present invention visits the method for putting old dead zone ponding, can solve existing spy and put old sky
The method safety poor controllability of Qu Shui and there is technical issues that.
To achieve the above object, the invention adopts the following technical scheme:
A kind of mine angle of depression negative pressure visits the method for putting old dead zone ponding, comprising the following steps:
S100, prospecting Test Cycle；
S200, the old dead zone water accumulating volume of estimation；
S300, leting speeper scheme is formulated；
S400, extraction drilling construction；
S500, the selection scheme of drawing water are drawn water.
Further, S100 reconnoitres Test Cycle, including whether judges water in gob area according to " mine geological hazards detailed rules and regulations "
Influence the safe construction in tunnel.
Further, S200 estimates old dead zone water accumulating volume, including by closing to ponding old dead zone periphery tunnel and old dead zone
The water outlet status such as wall investigate and analyse old dead zone whether ponding, and water in gob area amount is calculated using " excavation method ".
Further, S300 formulates leting speeper scheme, comprising:
It is first to arrange drilling advance drainge in the angle of depression in tunnel above old dead zone water body, the difficulty and risk of leting speeper are reduced,
The construction elevation angle leting speeper drilling in tunnel below the old dead zone with conventional method again, it is gradually unrestrained to remaining old dead zone ponding.?
Visiting before (pumping) puts old dead zone water needs to establish perfect drainage system.
Further, S400 extraction drilling construction, comprising:
The tunnel design angle of depression (containing vertical) extraction water drilling hole, detects ponding absolute altitude and depth above old dead zone.Underlying shield
Wall casing, drainpipe, pressure ventilation pipe manage casing slip casting admittedly, processing, mounting hole device etc..
Further, S500 selects the scheme of drawing water to draw water, comprising:
It is drawn water scheme using pressure wind, wherein pressure wind water plug is that machined working portion length using the steel pipe of ф 30mm
For the mixer of 1m, working portion is uniformly drilled with the fumarole of ф 5mm, bottom end closure；After 26m in mixer tripping in hole, on
Mouth hose is connect with the control gate valve of underground pressure air pipeline, to control the size of pressure wind, to control the size of pump-out.
As shown from the above technical solution, mine angle of depression negative pressure of the invention visits the method for putting old dead zone ponding, in old dead zone
Construction angle of depression drilling in tunnel above water body, carries out visiting in advance putting, since tunnel is located on old dead zone water body to old dead zone ponding
Side, the process that discharges water do not fully rely on differential water pressures gravity flow instead of and therefore, discharge water by pressing wind apparatus to draw water under negative pressure state
Process safety reliability, controllability are stronger.And can accomplish to discharge water in advance, reduce the influence to digging.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is 210806 working face of the present embodiment application case empty pools zone plane relation schematic diagram always；
Fig. 3 is the present embodiment application case leting speeper hole structure and pressure wind water plug structural schematic diagram；
Fig. 4 is that the present embodiment application case discharges water the graph of relation of effect drawdown and time.
Specific embodiment
To keep present invention implementation purposes, technical schemes and advantages clearer, below in conjunction in the embodiment of the present invention
Technical solution of the present invention is clearly and completely described in attached drawing, it is clear that and described embodiment is a part of the invention, and
It is not all of embodiment.
As shown in Figure 1, mine angle of depression negative pressure described in the present embodiment visits the method for putting old dead zone ponding, including following step
It is rapid:
S100, prospecting Test Cycle；
S200, the old dead zone water accumulating volume of estimation；
S300, leting speeper scheme is formulated；
S400, extraction drilling construction；
S500, the selection scheme of drawing water are drawn water.
It is illustrated below in conjunction with concrete application case
The embodiment of the present invention is long-pending to 210806 old dead zones are above covered during newly collecting 210606 working face of mine driving selected from middle coal
Water carries out unrestrained example, including the following contents:
First segment: project profile
Be 210806 working face Water in mined area areas right above new collection one mine, 210606 working face, within the scope of working face 6 coals with
On cover 8 coal seam average headways be 32m (plan positional relationship is shown in Fig. 2).According to " tunnel is in flooded area in " mine geological hazards detailed rules and regulations "
Or when tunneling under abandoned- mine water area, minimum range between tunnel and water body cannot be less than 10 times of head-room " regulation.
210606 air ways, machine lane across pitch are driving of going down the hill, and tunnel design height is 3.7m, and the distance between top water body is insufficient
10 times of head-room.Water in gob area will directly affect the safe construction in tunnel.
Second section: old dead zone water accumulating volume is estimated
By the way that 210806 machine lane transporting coals are joined with the observation of lane enclosing wall, enclosing wall bottom crack has a small amount of water to flow out, accordingly
It analyzes in 210806 face goafs and has been filled with ponding, about 9.5 ten thousand m of water in gob area amount is calculated using " excavation method "3。
Third section: leting speeper solution formulation
According to the spatial relationship of 210606 and 210806 working faces, and the physical condition of underground site is combined, proposes to visit and put
The scheme of 210806 face goaf ponding is as follows:
1, forced-ventilated water system is improved in 210606 machine lanes, upwards the drilling of Water in mined area area construction leting speeper.It is required that lane
Road tunnel during is laid with a time DN159 and twice the discharge pipe line of DN108 closely follow meet head on, construction drill site and sump in place
Chamber, it is desirable that sump volume is not less than 15m3.After improving and drilling and locate drainage system, arrangement drilling is to 210806 face goafs product
Water carries out gradually unrestrained.
2,210606 machine lanes are tunneled implementable to 210806 goaf water bodys lower sections after above scheme must wait two months,
And machine lane is driving of going down the hill, it is more that layer is worn in drilling, and draining height difference is big, and draining difficulty is big, leting speeper operation safety threaten it is big, to machine lane
The influence of driving is big.To carry out leting speeper work can in advance, the influence tunneled to machine lane is reduced, reduces leting speeper difficulty, certainly
Surely break conventional leting speeper mode, the surface in 210806 machine lane transporting coals connection lane in -550m track crossdrift, construction is bowed downwards
Angular bit hole carries out pre- extraction to 210806 water in gob area of lower section.
Section four: extraction drilling construction
Transport byroad is occupied in -550m track crossdrift, the extraction drilling of 210806 water in gob area of construction does not influence to go
Man-powered vehicle.
1,1# dip angle of hole is -90 °, when hole depth 17m underlying ф 127mm protection casing, fall in hole depth 26m~27.5m
It bores, illustrates to join the space lane Nei Shangyou in 210806 machine lane transporting coals, hole termination depth 28m preferable with goaf connectivity predicts ponding
Absolute altitude, water accumulating volume are accurate.
2,2# dip angle of hole is -42 °, when hole depth 7m underlying ф 127mm protection casing, the underlying ф 73mm casing of 0-47m makees
For drainpipe, ф 127mm protection casing and ф 73mm clamp sleeve interlayer install the 4 steel splitting pipes that a root long is 3m, aperture cement
It blocks tight.
Section five: Scheme Choice of drawing water
To increase the unrestrained dynamics to water in gob area, decision is drawn water using equipment.By to centrifugal self-priming pump, deep-well
Immersible pump and mine compressed air draw water the odds pair of scheme, and final selected pressure wind draws water scheme.
Press wind water plug structure simple, it is easy to operate, as shown in Figure 3.It machined work department using the steel pipe of ф 30mm
Dividing length is the mixer of 1m, and working portion is uniformly drilled with the fumarole of ф 5mm, bottom end closure.By 26m in mixer tripping in hole
Afterwards, suitable for reading to be connect with hose with the control gate valve of underground pressure air pipeline, to control the size of pressure wind, to control the big of pump-out
It is small.After taking pressure wind apparatus to be drawn water, the hole 1# water yield reaches 40m3/ h or more, effect of drawing water are obvious.
Section six: extraction water effect
From after carrying out extraction to 210806 face goaf ponding using mine compressed air, due to the water of extraction flows directly into-
In 550m track crossdrift ditch, do not influenced by the factors such as power, drain, extraction water is controlled substantially in 40m3/ h or more, water
Amount is stablized, and effect is obvious.The relation curve of drawdown and time are as shown in Figure 4.
Section seven: bearing fruit
1, by opening one's minds, break conventional leting speeper mode and unrestrained technique, -550m rail is utilized above pools zone
Road crossdrift construct downwards the angle of depression drilling, drawn water in the state of negative water pressure using mine compressed air, achieve ideal gas drainage results.
Vertical drilling hole 40d drawdown 15.5m, 3.8 ten thousand m of extraction water3, the deeper angle of depression inclined drill water level of later use dredges drawdown degree
Up to 19m, total white-out water is up to 4.6 ten thousand m3, illustrate that negative pressure unrestrained water scheme in the angle of depression is feasible.
2, by taking the angle of depression, negative pressure advance drainge hydraulic art, the duration for making spy put water in gob area more routinely shifts to an earlier date two
The time of wheat harvesting period provides strong safe practice guarantee for excavation replacement.
3, it by constructing in advance angle of depression extraction water drilling hole in -550m track crossdrift, saves the construction in 210606 machine lanes and discharges water
Two groups of hole (6), single hole hole depth are calculated by 80m, add up hole depth 480m, save altogether probing it is artificial, about 300,000 yuan of Master Cost.Together
When the water that goes out of extraction be directly entered -550m track crossdrift ditch, construction drill site, water can be saved in 210606 machine lane leting speeper
About 200,000 yuan of the expenses such as storehouse and power supply, draining.
Water in gob area below the angle of depression, negative pressure extraction, have it is advanced it is long in time limit, flow discharges are stable, influence factor is few, can
The good, high safety and reliability of control property, the advantages such as easy to operate, expense is low.It is applied successfully puts always for the advanced spy under conditions of similarity
Dead zone ponding provides valuable experience.
To sum up, the embodiment of the present invention is put for the spy of the old dead zone ponding of mine, in the case where not having lower spy and putting, is led to
The analysis and research to old empty pools zone are crossed, conventional leting speeper mode is broken, are carried out using the drilling of the existing roadway construction angle of depression old empty
The advanced spy of area's ponding is put.It was verified that being feasible using old dead zone ponding is put in spy in advance under angle of depression drilling negative pressure state
, it is excellent to have that safe operation is simple, controllability is good, flow discharges are stable, maintenance operation expense is low, the unrestrained water conservancy project phase is advanced etc.
Point provides valuable experience for the old dead zone ponding of advance dewatering under mine conditions of similarity.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that, it still can be to aforementioned each implementation
Technical solution documented by example modify perhaps equivalent replacement of some of the technical features and these modifications or
Replacement, the spirit and scope for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of mine angle of depression negative pressure visits the method for putting old dead zone ponding, comprising the following steps:
S100, prospecting Test Cycle；
S200, the old dead zone water accumulating volume of estimation；
S300, leting speeper scheme is formulated；
S400, extraction drilling construction；
S500, the selection scheme of drawing water are drawn water.
2. the mine angle of depression according to claim 1 negative pressure visits the method for putting old dead zone ponding, it is characterised in that: the S100
Reconnoitre in Test Cycle, including basis " mine geological hazards detailed rules and regulations " " when tunnel is tunneled under flooded area or abandoned- mine water area, tunnel
Minimum range between water body cannot be less than 10 times of head-room " regulation, judge whether water in gob area influences tunnel
Safe construction.
3. the mine angle of depression according to claim 2 negative pressure visits the method for putting old dead zone ponding, it is characterised in that: the S200
Estimate old dead zone water accumulating volume, including to old dead zone periphery tunnel and closing the investigation and analysis of wall, determine in old dead zone whether ponding, adopt
Water in gob area amount is calculated with " excavation method ".
4. the mine angle of depression according to claim 3 negative pressure visits the method for putting old dead zone ponding, it is characterised in that: the S300
Formulate leting speeper scheme, comprising:
It is first to arrange drilling advance drainge in the angle of depression in tunnel above old dead zone water body, the difficulty and risk of leting speeper are reduced, then use
Conventional method construction elevation angle leting speeper drilling in tunnel below the old dead zone, it is gradually unrestrained to remaining old dead zone ponding, it is put in spy
It needs to establish perfect drainage system before old dead zone water.
5. the mine angle of depression according to claim 4 negative pressure visits the method for putting old dead zone ponding, it is characterised in that: the S400
Extraction drilling construction, comprising:
Angle of depression extraction water drilling hole is designed in tunnel above old dead zone, detects ponding absolute altitude and depth, underlying protection casing, draining
Pipe, pressure ventilation pipe, manage casing slip casting admittedly, processing, mounting hole device.
6. the mine angle of depression according to claim 5 negative pressure visits the method for putting old dead zone ponding, it is characterised in that: the S500
The selection scheme of drawing water is drawn water；Include:
It is drawn water scheme using pressure wind；Wherein, pressure wind water plug is the mixer processed using steel pipe, and working portion is uniformly drilled with
Fumarole, bottom end closure；It is suitable for reading to be connect with hose with the control gate valve of underground pressure air pipeline by mixer tripping in hole, to control
The size of system pressure wind, to control the size of pump-out.
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| CN201910395802.XA CN110067597A (en) | 2019-05-13 | 2019-05-13 | A kind of mine angle of depression negative pressure visits the method for putting old dead zone ponding |
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| CN201910395802.XA CN110067597A (en) | 2019-05-13 | 2019-05-13 | A kind of mine angle of depression negative pressure visits the method for putting old dead zone ponding |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237015A (en) * | 2020-01-10 | 2020-06-05 | 陕西有色榆林煤业有限公司 | Prediction method for goaf water accumulation area of long-wall fully mechanized mining face |
| CN111485943A (en) * | 2020-04-17 | 2020-08-04 | 北京龙软科技股份有限公司 | Mine excavation water detection and drainage auxiliary system and method |
| CN113494312A (en) * | 2021-08-17 | 2021-10-12 | 华能铜川照金煤电有限公司西川煤矿分公司 | Facility for eliminating water accumulation threat of adjacent goaf of working face and implementation scheme |
| CN114562331A (en) * | 2022-03-03 | 2022-05-31 | 中煤科工集团西安研究院有限公司 | Method for preventing and controlling old open water of integrated mine from being damaged by small kiln in same thick coal seam |
| CN117248962A (en) * | 2023-11-20 | 2023-12-19 | 太原理工大学 | Method for treating presbyopia water among small kiln roadway column type residual coal pillars |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083961A (en) * | 2017-05-10 | 2017-08-22 | 中国矿业大学 | Laneway stress transfer method is pressed by force based on pressure break circle |
| CN108643966A (en) * | 2018-04-24 | 2018-10-12 | 中煤西安设计工程有限责任公司 | A kind of floor undulation concentration sluicing lane method for arranging |
-
2019
- 2019-05-13 CN CN201910395802.XA patent/CN110067597A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083961A (en) * | 2017-05-10 | 2017-08-22 | 中国矿业大学 | Laneway stress transfer method is pressed by force based on pressure break circle |
| CN108643966A (en) * | 2018-04-24 | 2018-10-12 | 中煤西安设计工程有限责任公司 | A kind of floor undulation concentration sluicing lane method for arranging |
Non-Patent Citations (1)
| Title |
|---|
| 谭军等: "负压俯角探放老空区积水技术应用", 《煤炭工程》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237015A (en) * | 2020-01-10 | 2020-06-05 | 陕西有色榆林煤业有限公司 | Prediction method for goaf water accumulation area of long-wall fully mechanized mining face |
| CN111485943A (en) * | 2020-04-17 | 2020-08-04 | 北京龙软科技股份有限公司 | Mine excavation water detection and drainage auxiliary system and method |
| CN113494312A (en) * | 2021-08-17 | 2021-10-12 | 华能铜川照金煤电有限公司西川煤矿分公司 | Facility for eliminating water accumulation threat of adjacent goaf of working face and implementation scheme |
| CN114562331A (en) * | 2022-03-03 | 2022-05-31 | 中煤科工集团西安研究院有限公司 | Method for preventing and controlling old open water of integrated mine from being damaged by small kiln in same thick coal seam |
| CN114562331B (en) * | 2022-03-03 | 2023-04-11 | 中煤科工集团西安研究院有限公司 | Method for preventing and controlling old open water of integrated mine from being damaged by small kiln in same thick coal seam |
| CN117248962A (en) * | 2023-11-20 | 2023-12-19 | 太原理工大学 | Method for treating presbyopia water among small kiln roadway column type residual coal pillars |
| CN117248962B (en) * | 2023-11-20 | 2024-01-26 | 太原理工大学 | Method for treating presbyopia water among small kiln roadway column type residual coal pillars |
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