CN106779231B - A kind of coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring - Google Patents
A kind of coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring Download PDFInfo
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- CN106779231B CN106779231B CN201611232051.2A CN201611232051A CN106779231B CN 106779231 B CN106779231 B CN 106779231B CN 201611232051 A CN201611232051 A CN 201611232051A CN 106779231 B CN106779231 B CN 106779231B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 19
- 239000003245 coal Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000011435 rock Substances 0.000 claims abstract description 25
- 230000036039 immunity Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000005553 drilling Methods 0.000 claims abstract description 4
- 238000002474 experimental method Methods 0.000 claims abstract description 3
- 238000012360 testing method Methods 0.000 claims abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- 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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Abstract
The present invention discloses a kind of coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring, belongs to coal mining technology field.It includes the steps of determining that some working face thickness value, broken swollen coefficient, the rock mass bulk density of rock mass is obtained by working face drilling rock stratum column data and in conjunction with Mechanics Parameters of Rock Mass test experiments；Step 2: goaf pressure cushion is arranged inside goaf, goaf pressure cushion is connect with pressure transmitter, the signal of pressure transmitter is transmitted through the cable to the data acquisition substation being located in tunnel, obtains goaf pressure value, rock mass can be obtained and be caving height and goaf internal voids Δ；Step 3: tight roof maximum immunity value Smax can be calculated in combination with mechanics of materials formula；Δ and maximum immunity value Smax are compared, are then the goaf hurricane disaster early warning moment as Δ >=0.8Smax.The present invention is based on a kind of simple installation, the goaf pressure monitorings that easy to operate, implementation cost is low to realize to goaf hurricane disaster early warning.
Description
Technical field
The present invention relates to the gap calculating sides of coal mine gob hurricane disaster method for early warning area based on goaf pressure monitoring
Method belongs to coal mining field.
Background technique
Above coal seam or thin direct top when competent bed biggish with intensity there are thickness, it will not be opened with working face
It adopts and is voluntarily caving in time, the goaf large area Xuan Ding is be easy to cause if not using other overhead caving measures, when outstanding top surface
Product reaches a certain level, and tight roof receiving load will exceed its own strength degree and moment occurrence of large-area is caving, accumulation
Energy inside top plate discharges rapidly, so that the great mine motive force disaster such as goaf hurricane disaster occur, easily causes mine
The heavy casualties of the badly damaged and Field Force of well equipment.The premise that goaf hurricane disaster occurs is goaf internal voids
It is too big, due to can not directly be monitored to goaf internal voids, therefore need to be by a kind of indirect monitoring method in goaf
Portion gap carries out Inversion Calculation.Currently, generally comprising bore detecting method and geophysics to the detection method in goaf both at home and abroad
Prospecting two major classes.Have the characteristics that by the obtained result of observation that drills it is intuitive, but due to, operation implementation high by engineering cost
Difficulty etc. limitation, a large amount of point layout can not be carried out while also be difficult to be determined the bounds in goaf, be only capable of into
Row minority engineering verification；Physical prospecting result has the problems such as multi-solution, positioning accuracy is insufficient, therefore traditional observation method is all
With certain limitation.
Summary of the invention
It is low the problem to be solved in the present invention is to provide a kind of easy for installation, easy to operate, implementation cost and can be to mined out
The method of area's realization hurricane disaster early warning.
The present invention provides the coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring, including walks as follows
It is rapid:
Step 1: determining the working face in some coal seam first, thus obtains its working face thickness value M, is bored according to working face
Hole rock stratum column data can obtain broken swollen COEFFICIENT K p, the rock mass of rock mass then in conjunction with Mechanics Parameters of Rock Mass test experiments respectively
Bulk density γ；
Step 2: several goaf pressure cushions, goaf pressure cushion and pressure inverting are arranged inside coal mine gob
Device connection, the signal of pressure transmitter is transmitted through the cable to the data acquisition substation being located in tunnel, to obtain goaf
Pressure value is P, and rock mass can be obtained according to calculation of pressure formula and be caving height ∑ h=P/ γ, further according to goaf internal voids meter
Formula is calculated, goaf internal voids Δ=M+ ∑ h-Kp ∑ h can be obtained；
Step 3: according to working face drilling rock stratum column data, hard top can be calculated in combination with mechanics of materials formula
Plate maximum immunity value is Smax；Goaf internal voids Δ and tight roof maximum immunity value Smax are compared, when Δ >=
It is then the goaf hurricane disaster early warning moment when 0.8Smax.
Compared with prior art, the beneficial effects of the present invention are:
(1) several pressure-measuring-points are arranged in goaf, after the extraction of coal seam, rear goaf will be gradually caving,
According to the variation of roof caving state, the pressure monitoring data inside goaf also change therewith, are obtained according to monitoring
Pressure value inverse obtains the pore size inside goaf, and tight roof can be calculated according to mechanics of materials formula and occur to break
Maximum immunity value when disconnected will be scratched according to the tight roof for monitoring goaf gap and theoretical calculation that calculation of pressure obtains is critical
Angle value compares, and sets corresponding vigilance parameter, to carry out early warning to goaf hurricane disaster accident.
(2) pressure cushion is arranged only by goaf in the present invention, and the variation of real-time monitoring goaf pressure is not required to very important person
Work is surveyed, and can be achieved with goaf hurricane disaster early warning, easy to operate, implementation cost is low, and labor intensity is low.
Detailed description of the invention
The hard top layer in the goaf Fig. 1 is caving preceding status diagram.
The goaf Fig. 2 pressure monitor system schematic diagram.
Appended drawing reference: goaf pressure cushion -1；Pressure transmitter -2；Cable -3；Data acquire substation -4；Working face -5；
Goaf -6；Tunnel -7；Tight roof -8.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
A kind of goaf pressure monitor system as shown in Fig. 1, it is first determined some coal work in coal mine working area
Then face 5 arranges that several goaf pressure cushions 1, goaf pressure cushion 1 are connect with pressure transmitter 2, pressure in goaf 6
The data that the signal of transmitter 2 is transferred in the tunnel 7 in 5 front of working face by cable 3 acquire in substation 4, are adopted by data
Collection substation 4 carries out acquiring storage goaf pressure value in real time.After the extraction of coal seam, rear goaf 6 will be gradually caving, root
According to the variation of roof caving state as shown in Fig. 2, the pressure monitoring data inside goaf 6 also change therewith, root
Go out the pore size inside goaf 6 according to the pressure value Inversion Calculation that monitoring obtains.Occur goaf hurricane disaster condition it
First is that gap existing for 6 inside of goaf is too big.Tight roof 8 is caving, and forms rock granular media packed structures in goaf 6,
Whole volume is greater than sillar and is caving front volume, and this property for being caving the increase of rock mass volume is the broken swollen characteristic of rock, is usually used
Broken swollen COEFFICIENT K p is indicated.Competent bed is caving block greatly and marshalling, broken swollen COEFFICIENT K p are smaller；Block float after soft rock is broken
Column are more random, and broken swollen COEFFICIENT K p is larger, and broken swollen COEFFICIENT K p can also pass through the coring on rock mass and combine corresponding rock mass mechanics
Parameter test method obtains, therefore how to determine that being caving height ∑ h becomes the key for calculating goaf internal voids.Due to can not
It directly measures, method of the present invention obtains the pressure inside goaf by above-mentioned goaf pressure monitor system
Power, if the obtained goaf pressure value of monitoring is P, working face 5 with a thickness of M, and being caving rock mass bulk density is that γ can pass through rock
Mechanics parameter test method obtains, and thus obtains tight roof and be caving height ∑ h to be P/ γ；Again by gap calculation formula Δ=
M-P/ (Kp-1), from formula as can be seen that goaf pressure P is smaller, gap Δ is bigger, and goaf hurricane disaster probability occurs
It is bigger.
Another condition that goaf hurricane disaster occurs is that tight roof 8 is broken.It can be with according to mechanics of materials formula
The maximum immunity value for calculating tight roof 8 is Smax, which is the critical value that tight roof 8 is broken, i.e., when tight roof 8
Amount of deflection be greater than Smax will be broken.
Obviously, when goaf gap Δ is closer to the maximum immunity value Smax of tight roof 8, then tight roof 8 is easier
It is broken.If the probability for illustrating that being broken occurs in tight roof is got over when calculated goaf gap Δ >=0.8Smax
Greatly, then it needs to carry out the early warning of goaf hurricane disaster, and corresponding measure is taken to carry out top plate processing.
The present invention arranges several pressure-measuring-points in goaf 6, and after the extraction of coal seam, rear goaf will gradually collapse
It falls, according to the variation of roof caving state, the pressure monitoring data inside goaf 6 also change therewith, according to monitoring
To pressure value inverse obtain the pore size inside goaf, tight roof 8 can be calculated according to mechanics of materials formula
Maximum immunity value when being broken, by the tight roof in the goaf gap and theoretical calculation that are obtained according to monitoring calculation of pressure
Critical deflection value compares, and sets corresponding vigilance parameter, to carry out early warning to goaf hurricane disaster accident.And this hair
It is bright that only by pressure cushion is arranged in goaf 6, the variation of real-time monitoring goaf pressure does not need manually to be surveyed,
It can be achieved with goaf hurricane disaster early warning, easy to operate, implementation cost is low, and labor intensity is low.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above
Change, modification will all be fallen in scope of the presently claimed invention.
Claims (1)
1. a kind of coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring, which is characterized in that including as follows
Step:
Step 1: determining the working face in some coal seam first, thus obtains its working face thickness value M, according to working face drilling rock
Layer column data, broken swollen COEFFICIENT K p, the rock mass bulk density of rock mass can be obtained then in conjunction with Mechanics Parameters of Rock Mass test experiments respectively
γ；
Step 2: arrange that several goaf pressure cushions, goaf pressure cushion and pressure transmitter connect inside coal mine gob
It connects, the signal of pressure transmitter is transmitted through the cable to the data acquisition substation being located in tunnel, to constitute one completely
Goaf pressure monitor system, obtaining goaf pressure value by goaf pressure cushion is P, and rock can be obtained according to calculation of pressure formula
Body is caving height ∑ h=P/ γ, and further according to goaf internal voids calculation formula, goaf internal voids Δ=M+ can be obtained
∑h-Kp·∑h；
Step 3: according to working face drilling rock stratum column data, tight roof can be calculated most in combination with mechanics of materials formula
Large deflection value is Smax；Goaf internal voids Δ and tight roof maximum immunity value Smax are compared, when Δ >=
It is then the goaf hurricane disaster early warning moment when 0.8Smax.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611232051.2A CN106779231B (en) | 2016-12-28 | 2016-12-28 | A kind of coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring |
| PCT/CN2017/110689 WO2018121106A1 (en) | 2016-12-28 | 2017-11-13 | Coal mine goaf area hurricane disaster warning method based on goaf area pressure monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611232051.2A CN106779231B (en) | 2016-12-28 | 2016-12-28 | A kind of coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring |
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| Publication Number | Publication Date |
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| CN106779231A CN106779231A (en) | 2017-05-31 |
| CN106779231B true CN106779231B (en) | 2018-12-11 |
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| CN201611232051.2A Active CN106779231B (en) | 2016-12-28 | 2016-12-28 | A kind of coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring |
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| WO (1) | WO2018121106A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106779231B (en) * | 2016-12-28 | 2018-12-11 | 中国矿业大学 | A kind of coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring |
| CN109269899A (en) * | 2018-09-05 | 2019-01-25 | 中国矿业大学(北京) | A kind of goaf top plate fracture simulation test device |
| CN109060599A (en) * | 2018-09-18 | 2018-12-21 | 中国矿业大学(北京) | Low temperature nitrogen migration rule simulation experiment platform and experimental method in coal mine gob |
| CN111428357B (en) * | 2020-03-20 | 2023-03-28 | 山西工程技术学院 | Method for determining maximum subsidence value of earth surface based on height of overburden rock residual free space |
| CN112525148B (en) * | 2020-11-04 | 2023-04-14 | 中铁第四勘察设计院集团有限公司 | Method for determining deformation range of goaf |
| CN112763020A (en) * | 2020-12-17 | 2021-05-07 | 华能煤炭技术研究有限公司 | Water amount monitoring method and device for inclined coal seam goaf and electronic equipment |
| CN112906208A (en) * | 2021-02-02 | 2021-06-04 | 中煤能源研究院有限责任公司 | Calculation method for top plate square caving step distance under condition of cutting hole staggered arrangement |
| CN114547723B (en) * | 2021-12-31 | 2024-06-14 | 安徽郎溪南方水泥有限公司 | Intelligent mine management and control method and device |
| CN114575845B (en) * | 2022-03-01 | 2024-07-02 | 中煤能源研究院有限责任公司 | Method for checking width of explosion-proof isolation coal pillar in room-pillar overhead goaf |
| CN115542417B (en) * | 2022-10-14 | 2023-04-25 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Goaf overlying strata stability monitoring system |
| CN115639350B (en) * | 2022-11-08 | 2024-06-21 | 绍兴文理学院 | Experimental device and method for simulating collapse at different heights and measuring crushing expansibility |
| CN115467662B (en) * | 2022-11-15 | 2023-01-24 | 中国矿业大学(北京) | Rock mass crushing and swelling characteristic in-situ test and evaluation method |
| CN116026698B (en) * | 2022-12-23 | 2023-07-18 | 平顶山天安煤业股份有限公司 | Test method for roof collapse of goaf of coal bed under disturbance stress |
| CN116104538B (en) * | 2023-03-16 | 2023-10-10 | 山东省地质矿产勘查开发局第五地质大队（山东省第五地质矿产勘查院） | Goaf rapid stabilization method based on mining area stratum stability investigation |
| CN117420170B (en) * | 2023-12-18 | 2024-03-12 | 山东科技大学 | Coal spontaneous combustion three-zone dividing method for coal mine goaf |
| CN118010102B (en) * | 2024-04-09 | 2024-07-12 | 煤炭科学研究总院有限公司 | Disaster early warning method and device for roof micro-deformation and coal stress collaborative monitoring |
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| CN102678118A (en) * | 2011-12-09 | 2012-09-19 | 王志强 | Method for determining height of caving zone of stope |
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| CN106779231B (en) * | 2016-12-28 | 2018-12-11 | 中国矿业大学 | A kind of coal mine gob hurricane disaster method for early warning based on goaf pressure monitoring |
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2016
- 2016-12-28 CN CN201611232051.2A patent/CN106779231B/en active Active
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- 2017-11-13 WO PCT/CN2017/110689 patent/WO2018121106A1/en active Application Filing
Patent Citations (3)
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|---|---|---|---|---|
| CN102678118A (en) * | 2011-12-09 | 2012-09-19 | 王志强 | Method for determining height of caving zone of stope |
| CN102928144A (en) * | 2012-10-14 | 2013-02-13 | 中国矿业大学 | System for monitoring gob stress in real time and overlying strata breakage judgment method |
| CN104850695A (en) * | 2015-05-14 | 2015-08-19 | 辽宁工程技术大学 | Method for determining effective goaf caving explosion scheme |
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| WO2018121106A1 (en) | 2018-07-05 |
| CN106779231A (en) | 2017-05-31 |
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