CN106528707A - Coal seam roof sandstone aquifer water-abundance evaluation method - Google Patents
Coal seam roof sandstone aquifer water-abundance evaluation method Download PDFInfo
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Abstract
The invention discloses a coal seam roof sandstone aquifer water-abundance evaluation method. The method comprises the following steps: first drawing each evaluation index aquifer water-abundance contour map by use of GIS software, dividing the sandstone aquifer water-abundance into different partitions according to each evaluation index grading standard to obtain each index single factor partition map; and then overlapping four single factor partition maps, and performing the water-abundance evaluation by use of the overlapped map. The disadvantage of the traditional method for evaluating according to specific capacity q value is compensated; the method is simple and practical, the water-abundance level at each range of a mine lot can be visually evaluated, and the method can be extensively used in the mine unit.
Description
Technical field
The present invention relates to a kind of roof sandstone aquifer watery evaluation methodology, belongs to field with "nine squares" exploration engineering field.
Background technology
With economic continuous development, China's producing coal amount is also presented gradually growth trend, the water damage met with during coal mining
Problem also emerges in an endless stream, and water from sandstone roof is most universal, most direct mainly one of water damage in China's coal-mine exploitation.Due to sandstone
Water electrode is uneven, and exploration phase bailing test hole is few, causes in exploitation, the feelings not being inconsistent with field with "nine squares" exploration data often occurs
Condition, brings material impact to safety in production.Direct water filling aquifer of the sandstone aquifer usually as seam mining, therefore, it is right
Reasonable prediction Forecast evaluation is made in the watery distribution of roof sandstone aquifer, research sandstone rock stratum watery subregion and right
Mine safety production has extremely important theory directive significance and practical value.
At present, judge the strong and weak main basis of aquifer water well《Mine geological hazards specify》, by drilling specific capacity (q)
Aquifer water well is divided into following 4 grades by value:1. weak watery：q≤0.1L/(s·m)；2. medium watery：0.1L/
(s m) ＜ q≤1.0L/ (s m)；3. strong watery：1.0L/ (s m) ＜ q≤5.0L/ (s m)；4. extremely strong watery：q
＞ 5.0L/ (s m).But there is following drawback in practical implementation in this method：Obtained by doing hydrology hole bailing test
To q values, typically investment is big, time-consuming, so causing the bailing test drilling hole amount in specific water-bearing layer in the range of research mining area extremely
Limited, corresponding specific capacity measuring point is very little, it is impossible to leads to too small amount of point and draws comprehensive watery division result.
The content of the invention
Goal of the invention：Make up by drilling specific capacity to carry out the weak point of watery subregion, there is provided Yi Zhong
More economical, more practical sandstone aquifer watery evaluation methodology in mine geological hazards work, the method based on expert estimation table,
GIS software analytic function combines.
Technical scheme：For achieving the above object, the technical solution used in the present invention is：
A kind of roof sandstone aquifer watery evaluation methodology, comprises the following steps：
Step 1, determines roof sandstone aquifer watery assessment indicator system, the watery assessment indicator system
Including 4 evaluation indexes, respectively sandstone lithology coefficient, consumption of rinsing liquid, the tomography zone of influence, the fold zone of influence.According to ore deposit
The roof sandstone aquifer punching situation in area exploiting field determines sandstone lithology coefficient and consumption of rinsing liquid respectively, according to mining area
The geologic map of the roof sandstone aquifer in exploiting field determines the tomography zone of influence and the fold zone of influence；.
Step 2, by drawing expert estimation table, according to expertise, determines the grade scale of each evaluation index in step 1
And weight coefficient.
Step 3, the sandstone lithology coefficient determined according to step 1, consumption of rinsing liquid, the tomography zone of influence, the fold zone of influence
And the grade scale of each evaluation index of step 2 determination, each evaluation index watery single factor test subregion is drawn using GIS software
Figure.
Step 4, the classification of each evaluation index that each index single factor test block plan that step 3 is obtained is obtained according to step 2
The weight coefficient of standard is overlapped, and carries out sandstone watery evaluation by the figure after superposition.
The grade scale of the evaluation index of the step (2) is：
The grade scale of each evaluation index represents the different watery grade of the different span correspondence of each evaluation index,
According to division of the specific capacity q value to aquifer water well, watery grade classification is：Watery is extremely weak, watery is weak, rich
Aqueouss are medium, strong 4 grades of watery：
A. single factor test index value<m1, watery is extremely weak.
b.m1<Single factor test index value≤m2, watery is weak.
c.m2<Single factor test index value≤m3, watery is medium.
D. single factor test index value>m3, watery is strong.
Wherein, m1<m2<m3。m1、m2、m3The different single factor test index value of each evaluation index is represented respectively.
The grade scale of each evaluation index is as shown in the table：
Evaluation index grade scale
The weight coefficient of each evaluation index is as shown in the table：
Evaluation criterion weight coefficient table
Preferably：The spatial analysis functions of GIS software are adopted in the step 3, each index aquifer water well etc. is drawn
Value line chart, according to each evaluation index grade scale, obtains each index single factor test block plan.
Beneficial effect：The present invention compared to existing technology, has the advantages that：
A kind of roof sandstone aquifer watery evaluation methodology that the present invention is provided, compensate for traditional according to unit
The deficiency that water yield q values are evaluated, and method simple practical, can intuitively evaluate the watery grade at each scope in mining area,
Can widely use in mine unit.
Description of the drawings
Fig. 1 is inventive method workflow diagram；
Fig. 2 is sandstone lithology coefficient watery block plan；
Fig. 3 is consumption of rinsing liquid watery block plan；
Fig. 4 is tomography influence area watery block plan；
Fig. 5 is fold influence area watery block plan；
Fig. 6 sandstone aquifers watery evaluates block plan.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, further elucidate the present invention, it should be understood that these examples are merely to illustrate this
Invention rather than restriction the scope of the present invention, after the present invention has been read, those skilled in the art are various to the present invention's
The modification of the equivalent form of value falls within the application claims limited range.
A kind of roof sandstone aquifer watery evaluation methodology, analysis coal seam aquifer water well influence factor's
On the basis of, determine roof sandstone aquifer watery evaluation index, combined according to expert estimation table and GIS software and obtained
Roof sandstone watery block plan, so as to evaluate to sandstone watery, the method compensate for traditional according to drilling
The deficiency that specific capacity q is evaluated, and method simple practical, can widely use in the watery evaluation of mining area.Such as Fig. 1 institutes
Show, specifically include following steps：
Step 1, analysis determine roof sandstone aquifer watery assessment indicator system, the watery evaluation index
System includes 4 evaluation indexes, respectively sandstone lithology coefficient, consumption of rinsing liquid, the tomography zone of influence, the fold zone of influence.So
Sandstone lithology coefficient and consumption of rinsing liquid are determined respectively according to the roof sandstone aquifer in mining area exploiting field punching situation afterwards,
The tomography zone of influence and the fold zone of influence are determined according to the geologic map of the roof sandstone aquifer in mining area exploiting field.
Wherein, sandstone lithology coefficient refers to the ratio of sandstone cumulative thickness and statistical piece overall length in the range of water flowing fractured zone, and this refers to
Mark reflection water-bearing layer rock gap feature, value 0～1；Consumption of rinsing liquid is the actual consumption of rinsing liquid value of exploratory bore-hole, single
Position m3/h；The tomography zone of influence, the fold zone of influence are in order to consider the shadow apart from tomography, fold different range to aquifer water well
Ring, unit m.
Step 2, by drawing expert estimation table, according to expertise, determines the grade scale of each evaluation index in step 1
And weight coefficient.
The grade scale of each evaluation index represents the different watery grade of the different span correspondence of each evaluation index,
Reference《Mine geological hazards specify》The middle division according to specific capacity q value to aquifer water well, watery grade classification is：
Watery is extremely weak, watery is weak, watery is medium, strong 4 grades of watery：
A. single factor test index value<m1, watery is extremely weak.
b.m1<Single factor test index value≤m2, watery is weak.
c.m2<Single factor test index value≤m3, watery is medium.
D. single factor test index value>m3, watery is strong.
Wherein, m1<m2<m3。m1、m2、m3The different single factor test index value of each evaluation index is represented respectively.
The grade scale of each evaluation index is as shown in the table：
Evaluation index grade scale
The weight coefficient of each evaluation index is as shown in the table：
Evaluation criterion weight coefficient table
Step 3, the sandstone lithology coefficient determined according to step 1, consumption of rinsing liquid, the tomography zone of influence, the fold zone of influence
And the grade scale of each evaluation index of step 2 determination, each evaluation index watery single factor test subregion is drawn using GIS software
Figure.Specifically using the spatial analysis functions of GIS software, each index aquifer water well isogram is drawn, according to each evaluation
Index grading standard, obtains each index single factor test block plan.
Step 4, the classification of each evaluation index that each index single factor test block plan that step 3 is obtained is obtained according to step 2
The weight coefficient of standard is overlapped, and carries out sandstone watery evaluation by the figure after superposition.
Have it is above-mentioned understand, the present invention a certain mining area is carried out roof sandstone watery evaluate when, it is soft first with GIS
Part draws each evaluation index aquifer water well isogram, according to each evaluation index grade scale, by sandstone aquifer rich water
Property is divided into different subregions, obtains each index single factor test block plan, is then overlapped 4 single factor test block plans, by being superimposed
Figure afterwards carries out watery evaluation.
With reference to workflow diagram (Fig. 1) and example, the present invention is further described：
3 coal seams in field with "nine squares" are mainly exploited in certain mining area exploiting field, and direct water filling aquifer is 3 roof sandstone of Shanxi group,
Top board sandstone maximum gauge 43m, average 20.18m, watery are extremely uneven, obtain 3 coal top bottoms according to long view hole, suction eye
The drilling specific capacity of plate sandstone aquifer, the specific capacity excursion of roof sandstone is：0.000512～
0.381343L/s m, according to《Mine geological hazards specify》The field with "nine squares" top board sandstone aquifer is weak watery～medium watery
Water-bearing layer, but to we have found that in exploiting field, corresponding specific capacity measuring point very little,
So can not really react exploiting field top board sandstone watery interior on a large scale with drilling specific capacity.Therefore, select new
Rational evaluation index and method are evaluated to sandstone aquifer watery, could provide more reliable to the preventing and treating of top board water damage
Foundation.
Specific evaluation procedure and result are as follows:
(1) analysis determines roof sandstone aquifer watery assessment indicator system；
, in the range of caving zone, Sandstone content is higher for roof, and sandstone thickness is relatively bigger, and watery is stronger.It is based on
This consideration, is used as Roof Rock Strata of Coal Seam totality using sandstone lithology coefficient (i.e. sandstone cumulative thickness is divided by statistical piece overall length)
The foundation of watery；The general structural fracture development position near tomography, fold etc. is water abundant ground；The tax of subsoil water in sandstone
Deposit and controlled by crack and pore abundance, often have drainage in drilling drilling process, crack pores'growth
Place is often water abundant ground, can use drilling fluid consumption as the strong and weak foundation of watery.Therefore choose sandstone rock
Property coefficient, drilling fluid consumption, the tomography zone of influence, the evaluation index of the fold zone of influence 4 are used as sandstone aquifer watery
Evaluation index.Sandstone lithology coefficient and flushing liquor are determined respectively according to the roof sandstone aquifer in mining area exploiting field punching situation
Consumption, determines the tomography zone of influence and the fold zone of influence according to the geologic map of the roof sandstone aquifer in mining area exploiting field.
Wherein, sandstone lithology coefficient is as shown in the table：
Consumption of rinsing liquid is as shown in the table：
(2) by drawing expert estimation table, according to expertise, grade scale and the weight system of each evaluation index are determined
Number；
Expert estimation table is made, is affected for sandstone lithology coefficient, drilling fluid consumption, the tomography zone of influence, fold
4, area evaluation index, according to the corresponding watery degree of strength of span of single index, draws the classification of each evaluation index
Standard and weight coefficient, grade scale and weight coefficient here are a kind of form, can be with according to different mining area practical situations
Change, rather than fixed value, evaluation result are shown in Table 1,2.
1 evaluation index grade scale of table
2 evaluation criterion weight coefficient table of table
(3) according to each watery evaluation index grade scale, evaluation index watery single factor test point is drawn using GIS software
Qu Tu；
Using the spatial analysis functions of GIS software, each index aquifer water well isogram is drawn, referred to according to each evaluation
Mark grade scale, obtains each index single factor test block plan, as shown in Fig. 2 being according to measured sandstone lithology coefficient and sandstone
The sandstone lithology coefficient watery block plan drawn by the Index grading standard of lithology factor.As shown in figure 3, being according to measured
Consumption of rinsing liquid and consumption of rinsing liquid the consumption of rinsing liquid watery block plan drawn of Index grading standard.Such as
Shown in Fig. 4, by the tomography zone of influence watery subregion drawn according to the measured tomography zone of influence and its Index grading standard
Figure.As shown in figure 3, by the fold zone of influence watery drawn according to the measured fold zone of influence and its Index grading standard
Block plan.
(4) figure that step (3) is obtained, i.e. sandstone lithology coefficient watery block plan, consumption of rinsing liquid watery point
Qu Tu, tomography influence area watery block plan, fold influence area watery block plan, using the overlaying function of GIS software,
Be overlapped according to weight coefficient, sandstone watery evaluation is carried out by the figure after superposition, as shown in Figure 6.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of roof sandstone aquifer watery evaluation methodology, it is characterised in that comprise the following steps：
Step 1, determines roof sandstone aquifer watery assessment indicator system, and the watery assessment indicator system includes
4 evaluation indexes, respectively sandstone lithology coefficient, consumption of rinsing liquid, the tomography zone of influence, the fold zone of influence；Adopted according to mining area
The roof borehole data in area determines sandstone lithology coefficient and consumption of rinsing liquid respectively, according to the roof in mining area exploiting field
The geologic map of sandstone aquifer determines the tomography zone of influence and the fold zone of influence；
Step 2, by drawing expert estimation table, according to expertise, determines the grade scale and power of each evaluation index in step 1
Weight coefficient；
Step 3, according to step 1 determine sandstone lithology coefficient, consumption of rinsing liquid, the tomography zone of influence, the fold zone of influence and
The grade scale of each evaluation index that step 2 determines, draws each evaluation index watery single factor test block plan using GIS software；
Step 4, the grade scale of each evaluation index that each index single factor test block plan that step 3 is obtained is obtained according to step 2
Weight coefficient be overlapped, carry out sandstone watery evaluation by the figure after superposition.
2. roof sandstone aquifer watery evaluation methodology according to claim 1, it is characterised in that：The step
(2) grade scale of evaluation index is：
The grade scale of each evaluation index represents the different watery grade of the different span correspondence of each evaluation index, according to
Division of the specific capacity q value to aquifer water well, watery grade classification is：Watery is extremely weak, watery is weak, watery
Strong 4 grades of medium, watery：
A. single factor test index value<m1, watery is extremely weak；
b.m1<Single factor test index value≤m2, watery is weak；
c.m2<Single factor test index value≤m3, watery is medium；
D. single factor test index value>m3, watery is strong；
Wherein, m1<m2<m3；m1、m2、m3The different single factor test index value of each evaluation index is represented respectively.
3. roof sandstone aquifer watery evaluation methodology according to claim 1, it is characterised in that：It is described respectively to comment
The grade scale of valency index is as shown in the table：
Evaluation index grade scale
4. roof sandstone aquifer watery evaluation methodology according to claim 1, it is characterised in that：It is described respectively to comment
The weight coefficient of valency index is as shown in the table：
Evaluation criterion weight coefficient table
5. roof sandstone aquifer watery evaluation methodology according to claim 1, it is characterised in that：The step
The spatial analysis functions of GIS software are adopted in 3, each index aquifer water well isogram is drawn, according to each evaluation index point
Level standard, obtains each index single factor test block plan.
6. roof sandstone aquifer watery evaluation methodology according to claim 1, it is characterised in that：The sandstone
Lithology factor refers to the ratio of sandstone cumulative thickness and statistical piece overall length in the range of water flowing fractured zone, and the index reflection water-bearing layer rock is empty
Gap feature, value 0～1.
7. roof sandstone aquifer watery evaluation methodology according to claim 1, it is characterised in that：The flushing
Liquid consumption is the actual consumption of rinsing liquid value of exploratory bore-hole.
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Cited By (14)
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|---|---|---|---|---|
| CN107165626A (en) * | 2017-06-30 | 2017-09-15 | 徐州市耐力高分子科技有限公司 | A kind of coal-face floods prevention method with cranny development country rock top plate |
| CN107436349A (en) * | 2017-07-27 | 2017-12-05 | 中国神华能源股份有限公司 | It is a kind of to be used for the appraisal procedure that husky danger is assessed of being burst to the gushing water of roof |
| CN107944778A (en) * | 2018-01-16 | 2018-04-20 | 安徽理工大学 | A kind of sandstone water-bearing law evaluation method based on step analysis |
| CN107942383A (en) * | 2017-11-13 | 2018-04-20 | 山东科技大学 | Roof sandstone watery grade prediction technique |
| CN109034528A (en) * | 2018-06-14 | 2018-12-18 | 安徽理工大学 | A kind of roof sandstone watery evaluation method that correlation method can be opened up based on improved grey model |
| CN109254138A (en) * | 2018-10-22 | 2019-01-22 | 陕西煤业化工技术研究院有限责任公司 | A kind of watery evaluation method based on sandstone microscopic feature |
| CN109670729A (en) * | 2019-01-02 | 2019-04-23 | 安徽理工大学 | A kind of top plate aquifer water well evaluation method |
| WO2019223357A1 (en) * | 2018-05-21 | 2019-11-28 | 中国矿业大学 | Method for predicting process water inflow of coal mine working face roof |
| CN110598281A (en) * | 2019-08-28 | 2019-12-20 | 桂林理工大学 | Entropy weight method based normal cloud model karst collapse prediction analysis method |
| CN111695303A (en) * | 2020-06-17 | 2020-09-22 | 中煤能源研究院有限责任公司 | Method for evaluating water filling strength of coal seam roof sandstone aquifer |
| CN112132454A (en) * | 2020-09-22 | 2020-12-25 | 中国矿业大学 | Comprehensive evaluation method for water-rich property of coal seam roof or floor aquifer |
| CN113011700A (en) * | 2021-02-02 | 2021-06-22 | 中国地质调查局油气资源调查中心 | Method for evaluating natural gas hydrate resources in frozen soil region |
| CN113153285A (en) * | 2021-05-13 | 2021-07-23 | 陕西正通煤业有限责任公司 | Coal seam surrounding rock water-rich electrical property evaluation standard calculation method |
| CN116894393A (en) * | 2023-07-24 | 2023-10-17 | 中国矿业大学 | Multi-parameter information fusion roof aquifer water-rich discrimination method |
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| CN107165626A (en) * | 2017-06-30 | 2017-09-15 | 徐州市耐力高分子科技有限公司 | A kind of coal-face floods prevention method with cranny development country rock top plate |
| CN107436349A (en) * | 2017-07-27 | 2017-12-05 | 中国神华能源股份有限公司 | It is a kind of to be used for the appraisal procedure that husky danger is assessed of being burst to the gushing water of roof |
| CN107942383A (en) * | 2017-11-13 | 2018-04-20 | 山东科技大学 | Roof sandstone watery grade prediction technique |
| CN107944778A (en) * | 2018-01-16 | 2018-04-20 | 安徽理工大学 | A kind of sandstone water-bearing law evaluation method based on step analysis |
| WO2019223357A1 (en) * | 2018-05-21 | 2019-11-28 | 中国矿业大学 | Method for predicting process water inflow of coal mine working face roof |
| CN109034528A (en) * | 2018-06-14 | 2018-12-18 | 安徽理工大学 | A kind of roof sandstone watery evaluation method that correlation method can be opened up based on improved grey model |
| CN109254138A (en) * | 2018-10-22 | 2019-01-22 | 陕西煤业化工技术研究院有限责任公司 | A kind of watery evaluation method based on sandstone microscopic feature |
| CN109670729A (en) * | 2019-01-02 | 2019-04-23 | 安徽理工大学 | A kind of top plate aquifer water well evaluation method |
| CN110598281A (en) * | 2019-08-28 | 2019-12-20 | 桂林理工大学 | Entropy weight method based normal cloud model karst collapse prediction analysis method |
| CN111695303A (en) * | 2020-06-17 | 2020-09-22 | 中煤能源研究院有限责任公司 | Method for evaluating water filling strength of coal seam roof sandstone aquifer |
| CN111695303B (en) * | 2020-06-17 | 2023-08-18 | 中煤能源研究院有限责任公司 | Method for evaluating water filling strength of sandstone aquifer of coal seam roof |
| CN112132454A (en) * | 2020-09-22 | 2020-12-25 | 中国矿业大学 | Comprehensive evaluation method for water-rich property of coal seam roof or floor aquifer |
| CN112132454B (en) * | 2020-09-22 | 2023-09-01 | 中国矿业大学 | Comprehensive evaluation method for water-rich property of water-bearing layer of roof or floor of coal seam |
| CN113011700A (en) * | 2021-02-02 | 2021-06-22 | 中国地质调查局油气资源调查中心 | Method for evaluating natural gas hydrate resources in frozen soil region |
| CN113011700B (en) * | 2021-02-02 | 2023-12-15 | 中国地质调查局油气资源调查中心 | Natural gas hydrate resource evaluation method in frozen soil area |
| CN113153285A (en) * | 2021-05-13 | 2021-07-23 | 陕西正通煤业有限责任公司 | Coal seam surrounding rock water-rich electrical property evaluation standard calculation method |
| CN113153285B (en) * | 2021-05-13 | 2023-11-24 | 陕西正通煤业有限责任公司 | Calculation method for water-rich electrical property evaluation standard of surrounding rock of coal bed |
| CN116894393A (en) * | 2023-07-24 | 2023-10-17 | 中国矿业大学 | Multi-parameter information fusion roof aquifer water-rich discrimination method |
| CN116894393B (en) * | 2023-07-24 | 2023-12-26 | 中国矿业大学 | Multi-parameter information fusion roof aquifer water-rich discrimination method |
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Application publication date: 20170322 |