CN104502995A - Ts-q method for evaluating floor water inrush dangerousness in coal mining of deep mine - Google Patents
Ts-q method for evaluating floor water inrush dangerousness in coal mining of deep mine Download PDFInfo
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- CN104502995A CN104502995A CN201410773039.7A CN201410773039A CN104502995A CN 104502995 A CN104502995 A CN 104502995A CN 201410773039 A CN201410773039 A CN 201410773039A CN 104502995 A CN104502995 A CN 104502995A
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The invention discloses a Ts-q method for evaluating the floor water inrush dangerousness in coal mining of a deep mine. The method comprises the following steps: firstly, drilling a hydrogeological borehole in a testing point on the ground; obtaining a thickness value M from the bottom interface of a coal seam to a top interface of a water-containing layer by the hydrogeological borehole, a water level value of the water-containing layer and a unit inflow value q of the borehole in the water-containing layer; calculating a water pressure value P according to the water level value of the water-containing layer; subsequently solving a water inrush coefficient value Ts according to the water pressure value P and the thickness value M; afterwards performing classified evaluation on the water inrush dangerousness according to the water inrush coefficient value Ts and the unit water inflow value q of the borehole. The method has the advantages of making up the shortcoming that the size of water content in the water-filled water-containing layer is not considered in a traditional water inrush coefficient method for evaluating the water inrush dangerousness and breaking through the choke point of failed mining due to over limit of the water inrush coefficient at a deep 'high pressure-small water content' hydrogeological condition, and is simple, practical and conveniently generally popularizes and used by production enterprises.
Description
Technical field
The invention belongs to coal mine flood category, relate to a kind of method that base plate karst aquifer Spray water way when exploiting for deep fractures is evaluated.
Background technology
China's coal-mine bed complicated hydrogeological conditions, particularly karst water often charge into pit harm production safety, organize coal (coal in the Taiyuan Formation) exploitation under North China type coalfield, are generally subject to the threat of coal measure strata substrate grey confined aquifer difficult to understand.What practical was maximum is water bursting coefficient method.The history that lower group of coal mining had for more than 40 years is carried out in the mining areas such as Jiaozhuo, peak-to-peak, Zibo, Feicheng, the Huaibei.During early stage exploitation, the general degree of depth is less, and the hydraulic pressure that ash difficult to understand splits mining face water-resisting floor is generally all less than 3MPa (major part is 1 ~ 2MPa); Long-term mining Practice and scientific research, worked out " mine geological hazards regulation ", clearly used water bursting coefficient T
s(base plate filled water bearing strata hydraulic pressure is except impermeable layer thickness) carrys out the assay Water Inrush extent of injury, and its critical value is 0.06 ~ 0.10MPa/m.Mining Practice is verified, (is less than 3MPa), evaluates the security of exploitation with water bursting coefficient under general hydraulic pressure, substantially realistic; This is the huge theory and technology contribution that China's coal mines hydrogeologist and relevant speciality technician prevent and treat coal mining water damage.Along with the increase gradually of mining depth, the hydraulic pressure of ash difficult to understand increases gradually; In deep mining, floor strata off-load under high confining pressure produces coal seam floor failure, and ash difficult to understand leads a liter band height in addition, is far longer than the higher limit of defined in specification by hydraulic pressure divided by the water bursting coefficient that relative water resisting layer thickness obtains.But in some field with "nine squares", lower group of coal buried depth can reach 1200m, ash difficult to understand is also in the core portion of synclinal structure, Ordovician karst water hydraulic pressure reaches 7.3 ~ 13.0MPa, and be base plate superelevation piestic water, water bursting coefficient reaches 0.144 ~ 0.256MPa/m, minimum value also exceedes the specification safe working water bursting coefficient upper limit, because the grey rock stratum of Austria is positioned at deep, under high confining pressure condition, crack agensis, and there is no strong runoff band, watery is poor, and boring specific capacity is 0.01 ~ 0.10L/ (sm), and water-bearing zone connectedness is not strong.
Summary of the invention
Goal of the invention: in order to overcome the dangerous deficiency that can not be applicable to deep mining completely of water bursting coefficient method evaluation exploitation in prior art, the invention provides a kind of dark mine coal seam exploitation Water Inrush hazard assessment T
s-q method, on the basis of existing water bursting coefficient method, introduce water-bearing zone watery index---specific capacity (q value) this index, supplementing as water bursting coefficient method.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
The present invention, on the basis of a large amount of gushing water example statistical study, furthers investigate the relation between Spray water way and water bursting coefficient, filled water bearing strata watery, obtains the understanding of certain law; Propose mine coal seam exploitation Water Inrush hazard assessment T
s-q method, the method compensate for traditional water bursting coefficient method and evaluates the deficiency that Spray water way does not consider filled water bearing strata (water source) watery size (boring specific capacity q), breach deep " high pressure-bearing-weak rich water " hydrogeological condition because water bursting coefficient transfinites unworkable bottleneck; And method simple practical, be convenient to the application of production unit popularity.The method specifically comprises the steps:
(1) test point on ground bores Geology Drilling, obtained the boring specific capacity value q in the coal seam bottom boundary distance one-tenth-value thickness 1/10 M at interface, top, water-bearing zone, the water level value in water-bearing zone and water-bearing zone by Geology Drilling, the water level value according to water-bearing zone calculates hydraulic pressure force value P;
(2) water bursting coefficient value T is asked for according to hydraulic pressure force value P and one-tenth-value thickness 1/10 M
s, then comprehensive water bursting coefficient value T
stest point carried out to the evaluation of classification of Spray water way with boring specific capacity value q, is specially:
A., when 0<q≤0.06, test point is comparatively safe;
B. as 0.06<q≤1:T
swhen≤0.04, test point is comparatively safe; T
sduring >0.04, test point is dangerous;
C. as 1<q≤2:T
swhen≤0.04, test point is comparatively safe; 0.04<T
swhen≤0.06, test point is dangerous; T
sduring >0.06, test point is high-risk;
D. as 2<q≤5:T
swhen≤0.01, test point is comparatively safe; 0.01<T
swhen≤0.06, test point is dangerous; T
sduring >0.06, test point is high-risk;
E. q>5:T is worked as
swhen≤0.01, test point is comparatively safe; 0.01<T
swhen≤0.04, test point is dangerous; T
sduring >0.04, test point is high-risk;
Wherein, T
sunit be the unit of MPa/m, q be L/ (sm).
Concrete, when Spray water way evaluation is carried out for some workplaces, at least get the evaluation of classification that 3 test points carry out Spray water way the scope of workplace is inner and/or outer, get the Spray water way evaluation result of evaluation result as workplace of the test point of most high-risk grade.
Concrete, when carrying out Spray water way evaluation to some mining areas, concrete grammar is: the water bursting coefficient value T first drawing each test point
sthen two isograms are superposed, by the figure after superposition according to T by the isogram of isogram and boring specific capacity value q
s-q method (i.e. step (2)) determines the Spray water way evaluation result in mining area.
Beneficial effect: dark mine coal seam exploitation Water Inrush hazard assessment T provided by the invention
s-q method, compensate for traditional water bursting coefficient method and evaluates Spray water way and do not consider the deficiency of filled water bearing strata watery size, breach deep " high pressure-bearing-weak rich water " hydrogeological condition because water bursting coefficient transfinites unworkable bottleneck; And method simple practical, be convenient to the application of production unit popularity.
Accompanying drawing explanation
Fig. 1 is the middle or small projective water point T of mining area, Feicheng Water Inrush
s-q characteristic pattern;
Fig. 2 is the large, medium and small projective water point T of Jiaozuo Mine Field Water Inrush
s-q characteristic pattern;
Fig. 3 is the middle or small projective water point T of mining area, Zibo Water Inrush
s-q characteristic pattern;
Fig. 4 is Feicheng, Jiaozhuo, the large, medium and small projective water point T in mining area, 3, Zibo
s-q characteristic pattern; Wherein: 4 (a) is T when horizontal ordinate (0-20) and ordinate (0-2.5)
s-q characteristic pattern; 4 (b) is T when horizontal ordinate (0-20) and ordinate (0-0.2)
s-q characteristic pattern; 4 (c) is T when horizontal ordinate (0-2) and ordinate (0-0.1)
s-q characteristic pattern; 4 (d) is T when horizontal ordinate (1-5) and ordinate (1-0.1)
s-q characteristic pattern; 4 (e) is T when horizontal ordinate (0-0.1) and ordinate (0-0.1)
s-q characteristic pattern;
Fig. 5 is T of the present invention
s-q method schematic diagram;
Fig. 6 is the invention process schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
The present invention have collected 216 projective water point data in mining area, Feicheng, Jiaozuo Mine Field and mining area, Zibo, comprises projective water point hydraulic pressure, relative water resisting layer thickness and q value; Concrete condition is as follows:
1, when the medium projective water point in mining area, Feicheng is all positioned at water-bearing zone boring specific capacity q>2L/ (sm), and as water bursting coefficient T
sduring <0.015MPa/m, medium projective water point is also little.As shown in Figure 1.
2, the little projective water point overwhelming majority in Jiaozuo Mine Field occurs when q<2L/ (sm), and when the large projective water point quantity of q>2L/ (sm) accounts for 100% of large projective water point example sum, medium projective water point quantity accounts for 95% of medium projective water point example sum; Work as T
sduring <0.01MPa/m, there is no projective water point; Little projective water point horizontal ordinate q value be mostly distributed in be less than 2L/ (sm) scope in, and all projective water points are mostly distributed in water bursting coefficient to be less than in the scope of 0.1MPa/m, the horizontal ordinate separatrix of little projective water point and medium projective water point is roughly the straight line of q=2L/ (sm), and as water bursting coefficient T
swhen value is less than 0.01MPa/m, large, medium and small projective water point distribution is less.As shown in Figure 2.
3, the horizontal ordinate separatrix of the medium and small projective water point in mining area, Zibo is roughly straight line q=2L/ (sm), and projective water point is mostly positioned at water bursting coefficient T
sin the scope of <0.2MPa/m, little projective water point mainly concentrates in the scope of q<2L/ (sm), and at water bursting coefficient T
sin the scope of <0.04MPa/m, the rare distribution of little projective water point; At water bursting coefficient T
sin the scope of <0.02MPa/m, medium projective water point does not distribute.As shown in Figure 3.
4, the little projective water point in three mining areas mainly concentrates in the scope of q<2L/ (sm), and projective water point mostly concentrates on T
sin the scope of=0.00 ~ 0.25MPa/m; From the gushing water water yield, horizontal ordinate is the closer to 0 point, and the gushing water water yield is less; As water bursting coefficient T
sduring <0.04MPa/m, little projective water point is less; As q<0.1L/ (sm), projective water point is less, and as q<0.06 L/ (sm), without projective water point; Work as T
s<0.04MPa/m, and time q>2L/ (sm), medium projective water point increases, but work as T
sduring <0.01MPa/m, projective water point is little.As shown in Figure 4.
Based on above-mentioned data, set up one in rectangular coordinate system, ordinate is water bursting coefficient value T
s, horizontal ordinate is boring specific capacity value q; First in the drawings a broken line is set, the projective water point gushing water amount <0m in region between broken line and coordinate axis
3/ h, and consider certain safety coefficient, finally obtain broken line 1, the region between broken line 1 and coordinate axis is as the comparatively safe region of Water Inrush safety evaluatio; The scope that medium projective water point is assembled roughly can be irised out with a broken line, and considers certain safety coefficient, as broken line 2; Distance between broken line 1 and broken line 2 as explosive area, i.e. the easy generation area of medium gushing water; Region beyond broken line 2 as high-risk danger zone, i.e. large gushing water and the easy generation area of water bursting.Final foundation is dark mine coal seam exploitation Water Inrush hazard assessment T as shown in Figure 5
s-q method schematic diagram, concrete data are as follows:
A., when 0<q≤0.06, test point is comparatively safe;
B. as 0.06<q≤1:T
swhen≤0.04, test point is comparatively safe; T
sduring >0.04, test point is dangerous;
C. as 1<q≤2:T
swhen≤0.04, test point is comparatively safe; 0.04<T
swhen≤0.06, test point is dangerous; T
sduring >0.06, test point is high-risk;
D. as 2<q≤5:T
swhen≤0.01, test point is comparatively safe; 0.01<T
swhen≤0.06, test point is dangerous; T
sduring >0.06, test point is high-risk;
E. q>5:T is worked as
swhen≤0.01, test point is comparatively safe; 0.01<T
swhen≤0.04, test point is dangerous; T
sduring >0.04, test point is high-risk;
Wherein, T
sunit be the unit of MPa/m, q be L/ (sm).
Based on above-mentioned analysis, the dark mine coal seam exploitation Water Inrush hazard assessment T that we provide
s-q method, specifically comprises the steps:
(1) test point on ground 1 bores Geology Drilling 4, obtain by Geology Drilling 4 the boring specific capacity value q that the one-tenth-value thickness 1/10 M at interface, the water level value in water-bearing zone 3 and water-bearing zone 3 are pushed up in coal seam 2 bottom boundary distance water-bearing zone 3, the water level value according to water-bearing zone 3 calculates hydraulic pressure force value P;
(2) water bursting coefficient value T is asked for according to hydraulic pressure force value P and one-tenth-value thickness 1/10 M
s, then comprehensive water bursting coefficient value T
swith reference to Fig. 5, test point to be carried out to the evaluation of classification of Spray water way with boring specific capacity value q.
When practical application, first calculate and take away the water bursting coefficient adopting or dig plot, and according to the watery index q of floor water-bearing rock, can at T
s-q method schematic diagram coordinate obtains corresponding a bit, according to the position of this point, can judge to exploit or the Spray water way in digging plot.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a dark mine coal seam exploitation Water Inrush hazard assessment T
s-q method, is characterized in that: comprise the steps:
(1) Geology Drilling (4) is bored in the test point of ground (1), obtained the boring specific capacity value q of coal seam (2) bottom boundary distance water-bearing zone (3) the top one-tenth-value thickness 1/10 M at interface, the water level value of water-bearing zone (3) and water-bearing zone (3) by Geology Drilling (4), the water level value according to water-bearing zone (3) calculates hydraulic pressure force value P;
(2) water bursting coefficient value T is asked for according to hydraulic pressure force value P and one-tenth-value thickness 1/10 M
s, then comprehensive water bursting coefficient value T
stest point carried out to the evaluation of classification of Spray water way with boring specific capacity value q, is specially:
A., when 0<q≤0.06, test point is comparatively safe;
B. as 0.06<q≤1:T
swhen≤0.04, test point is comparatively safe; T
sduring >0.04, test point is dangerous;
C. as 1<q≤2:T
swhen≤0.04, test point is comparatively safe; 0.04<T
swhen≤0.06, test point is dangerous; T
sduring >0.06, test point is high-risk;
D. as 2<q≤5:T
swhen≤0.01, test point is comparatively safe; 0.01<T
swhen≤0.06, test point is dangerous; T
sduring >0.06, test point is high-risk;
E. q>5:T is worked as
swhen≤0.01, test point is comparatively safe; 0.01<T
swhen≤0.04, test point is dangerous; T
sduring >0.04, test point is high-risk;
Wherein, T
sunit be the unit of MPa/m, q be L/ (sm).
2. dark mine coal seam exploitation Water Inrush hazard assessment T according to claim 1
s-q method, it is characterized in that: when Spray water way evaluation is carried out for some workplaces, at least get the evaluation of classification that 3 test points carry out Spray water way the scope of workplace is inner and/or outer, get the Spray water way evaluation result of evaluation result as workplace of the test point of most high-risk grade.
3. dark mine coal seam exploitation Water Inrush hazard assessment T according to claim 1
s-q method, is characterized in that: when carrying out Spray water way evaluation to some mining areas, concrete grammar is: the water bursting coefficient value T first drawing each test point
sthen two isograms are superposed, the figure after superposition are determined the Spray water way evaluation result in mining area according to step (2) by the isogram of isogram and boring specific capacity value q.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410773039.7A CN104502995A (en) | 2014-12-15 | 2014-12-15 | Ts-q method for evaluating floor water inrush dangerousness in coal mining of deep mine |
| PCT/CN2015/081602 WO2016095462A1 (en) | 2014-12-15 | 2015-06-17 | TS-q METHOD FOR EVALUATING FLOOR WATER INRUSH RISK IN DEEP MINE COAL SEAM MINING |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410773039.7A CN104502995A (en) | 2014-12-15 | 2014-12-15 | Ts-q method for evaluating floor water inrush dangerousness in coal mining of deep mine |
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| WO (1) | WO2016095462A1 (en) |
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| CN105069689A (en) * | 2015-08-21 | 2015-11-18 | 山东科技大学 | Coal seam floor water-inrush risk evaluation method based on combination of grey correlation and FDAHP |
| WO2016095462A1 (en) * | 2014-12-15 | 2016-06-23 | 中国矿业大学 | TS-q METHOD FOR EVALUATING FLOOR WATER INRUSH RISK IN DEEP MINE COAL SEAM MINING |
| CN106703883A (en) * | 2016-12-29 | 2017-05-24 | 山东科技大学 | Method for determining floor water inrush danger level of coal mining working faces in personalized manner |
| CN107288638A (en) * | 2017-07-31 | 2017-10-24 | 中国神华能源股份有限公司 | Getting working face water damage appraisal procedure, medium and system |
| CN108804600A (en) * | 2018-05-29 | 2018-11-13 | 山东省地质矿产勘查开发局第三水文地质工程地质大队(山东省鲁南地质工程勘察院) | Information analysis display method for basic data of coal mining subsidence area |
| CN109917463A (en) * | 2019-04-04 | 2019-06-21 | 中国矿业大学(北京) | Slip casting working face Water Inrush hazard assessment system based on drill hole information library |
| CN113255964A (en) * | 2021-04-25 | 2021-08-13 | 中国矿业大学(北京) | Coal seam floor water inrush prediction method, device and equipment based on double coefficients |
| CN114412567A (en) * | 2021-12-08 | 2022-04-29 | 中国矿业大学 | Early warning method for in-situ water-retention coal mining on water with bottom plate limestone bearing pressure |
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| CN105069689A (en) * | 2015-08-21 | 2015-11-18 | 山东科技大学 | Coal seam floor water-inrush risk evaluation method based on combination of grey correlation and FDAHP |
| CN105069689B (en) * | 2015-08-21 | 2017-03-29 | 山东科技大学 | Based on the coal seam floor water-inrush risk evaluation method that grey correlation is combined with FDAHP |
| CN106703883A (en) * | 2016-12-29 | 2017-05-24 | 山东科技大学 | Method for determining floor water inrush danger level of coal mining working faces in personalized manner |
| CN107288638A (en) * | 2017-07-31 | 2017-10-24 | 中国神华能源股份有限公司 | Getting working face water damage appraisal procedure, medium and system |
| CN107288638B (en) * | 2017-07-31 | 2019-11-12 | 中国神华能源股份有限公司 | Getting working face water damage appraisal procedure, medium and system |
| CN108804600A (en) * | 2018-05-29 | 2018-11-13 | 山东省地质矿产勘查开发局第三水文地质工程地质大队(山东省鲁南地质工程勘察院) | Information analysis display method for basic data of coal mining subsidence area |
| CN109917463A (en) * | 2019-04-04 | 2019-06-21 | 中国矿业大学(北京) | Slip casting working face Water Inrush hazard assessment system based on drill hole information library |
| CN113255964A (en) * | 2021-04-25 | 2021-08-13 | 中国矿业大学(北京) | Coal seam floor water inrush prediction method, device and equipment based on double coefficients |
| CN114412567A (en) * | 2021-12-08 | 2022-04-29 | 中国矿业大学 | Early warning method for in-situ water-retention coal mining on water with bottom plate limestone bearing pressure |
| CN114412567B (en) * | 2021-12-08 | 2023-03-14 | 中国矿业大学 | Early warning method for in-situ water-retention coal mining on water with bearing pressure of bottom plate limestone |
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