CN102778480A - Electrically identifying method for aquosity of earth surface of mining-induced fissure zone of mining area under dry condition - Google Patents
Electrically identifying method for aquosity of earth surface of mining-induced fissure zone of mining area under dry condition Download PDFInfo
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- CN102778480A CN102778480A CN2012102570956A CN201210257095A CN102778480A CN 102778480 A CN102778480 A CN 102778480A CN 2012102570956 A CN2012102570956 A CN 2012102570956A CN 201210257095 A CN201210257095 A CN 201210257095A CN 102778480 A CN102778480 A CN 102778480A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005065 mining Methods 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000004576 sand Substances 0.000 claims description 29
- 238000005259 measurement Methods 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 11
- 239000010410 layer Substances 0.000 abstract description 12
- 239000002689 soil Substances 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 3
- 239000002344 surface layer Substances 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
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- 230000019771 cognition Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02A90/30—Assessment of water resources
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Abstract
The invention discloses an electrically identifying method. The electrically identifying method includes steps of measuring resistivity of a sandy soil layer of an earth surface of a mining area to acquire first resistivity data; collecting a plurality of earth surface sandy soil samples in a testing field, and detecting resistivities of the earth surface sandy soil samples with different moisture contents to acquire second resistivity data; and comparing the first resistivity data with the second resistivity data to acquire moisture content of the sandy soil layer of the earth surface of the mining zone. Precision resistivity distribution of the earth surface layer is acquired by exploration by a high-density electric method in the field, test for resistivity parameters of surface sandy soil with different moisture contents is carried out by test equipment of a laboratory to acquire correlation of change of the resistivities of the surface sandy soil with different moisture content, further, aquosity of the earth surface of the exploration area is quantitatively determined according to the correlation and the resistivity distribution actually measured in the field, and quantitative determination for the aquosity of the sandy soil layer explored by the electrically identifying method is realized.
Description
Technical field
The present invention relates to the electrical recognition methods of the mining-induced fissure band face of land, the mining area property of water-bearing under a kind of drought condition.
Background technology
The ecologically fragile areas of coal mining (for example, mining-induced fissure band in mining area under the drought condition) are because itself ecological threshold is lower, the disturbance rejection ability, and the exploitation meeting of coal resources causes irreversible destruction to it.The problems of geo-environment such as water resource poorness, desertification and soil erosion are the key factors of restriction mining area coal industry development, also are the pressing problems that the development of resources of western ecologically fragile area faces simultaneously.
Resistivity prospecting is a kind of geophysical exploration method relatively more responsive to media water-bearing property; By early be applied to water resource exploration and hydrogeologic survey etc.; Since the nineties; The very fast development of resistivity prospecting technology, relevant science and technology such as graph imageization and digitizing begin to be applied to resistivity prospecting.
At present; Resistivity prospecting is used to investigate the stratum property of water-bearing to be differentiated according to moisture back, stratum resistivity step-down, and medium or low resistance district in stratum is differentiated for possible moisture, still; Because people do not have study and cognition to go out the quantitative relationship between stratum water percentage and the change in resistance; Therefore, be difficult to accurately judge and the true property of water-bearing of estimating the stratum, to such an extent as in domain restrictions such as engineering and environment the application usefulness of resistivity prospecting.
Summary of the invention
To prior art problems, the purpose of this invention is to provide the electrical recognition methods of the mining-induced fissure band face of land, the mining area property of water-bearing under a kind of drought condition.
Electrical recognition methods provided by the invention may further comprise the steps: a. utilizes the high-density electric measurement mechanism, measures the resistivity of mining area surface sand layer, to obtain first resistivity data; B. gather a plurality of faces of land sand sample in test site, detect the resistivity of the face of land sand sample of a plurality of different water cut rates, to obtain second resistivity data; C. first resistivity data and second resistivity data are compared, draw the water percentage of mining area surface sand layer.
Preferably, the face of land sand sample of a plurality of different water cut rates comprises: water percentage is several in the face of land sand sample under 5%, 10%, 15%, 20%, 30%, 50% and 100% water status.
The number of preferably, gathering face of land sand sample is more than or equal to three.
Preferably, in step a, test environment conditions satisfies: temperature-20 ℃～60 ℃, humidity < 90%.
Preferably, said high-density electric measurement mechanism is the winner device or executes the Justin Lemberg device.
Preferably, the high-density electric measurement mechanism comprises: power supply, transmitting electrode, potential electrode, signal picker, and wherein: power supply is connected with transmitting electrode; Transmitting electrode is that setting in pairs, potential electrode are for be provided with in pairs; Potential electrode is connected with signal picker.
Preferably, signal picker is a voltage table, and said voltage table is connected between two potential electrode.
Preferably, transmitting electrode, potential electrode are laid on same the slotted line.
With respect to prior art; The present invention obtains surface layer fine resistors rate through on-the-spot high-density electric exploration and distributes; Utilize the lab investigation equipment to carry out the resistance parameter test of top layer sand different water cut rate; Draw the change in resistance correlationship of the top layer sand of different water cut rate, and then utilize this correlationship and field measurement resistivity distribution to quantitatively judge the face of land, the exploration area property of water-bearing, realize the quantitative identification of the resistivity prospecting sand layer property of water-bearing.
Description of drawings
Fig. 1 is the process flow diagram of the electrical recognition methods of a kind of preferred implementation of the present invention;
Fig. 2 a, 2b are the synoptic diagram of the resistivity test device that adopts at the scene in the electrical recognition methods of a kind of preferred implementation of the present invention;
Fig. 3 is the device synoptic diagram that the resistivity of face of land sand sample is detected in the laboratory in the electrical recognition methods of a kind of preferred implementation of the present invention.
Embodiment
Fig. 1 is the process flow diagram of the electrical recognition methods of a kind of preferred implementation of the present invention.As shown in the figure, in step 101, utilize the high-density electric measurement mechanism, measure the resistivity of mining area surface sand layer, obtain first resistivity data.
High-density electric is a kind of electrical resistivity survey method that the electrical property difference with rock soil mass is the basis, according in the regularity of distribution that applies electric field action sub-surface conduction current, infers that underground tax with geologic body of different resistivity deposits situation.
In a kind of embodiment of the resistivity of utilizing high-density electric measurement mechanism measurement mining area surface sand layer:
Exploitation workplace buried depth is a H rice, and the work face width is an X rice, lays four slotted lines on the corresponding face of land of workplace; Be laid with a plurality of electrodes on every slotted line; The conduct that has in the said electrode is to the transmitting electrode of underground power supply, have as potential electrode, shown in Fig. 2 a, 2b.The length of every slotted line can be chosen according to coal seam buried depth and digging speed, for the fast zone of mechanization mine fltting speed, can select 1000～2000 meters long slotted lines.The distance that slotted line start point distance workplace is cut eye is coal seam buried depth H, and each slotted line spacing equates (be about face width 1/3).Crossheading is consistent under first slotted line 1 and the workplace; Second slotted line 2, the 3rd slotted line 3 lay respectively at workplace inside; The 4th slotted line 4 is stepped out about 1/6 face width of coal face and is in the unworked country, and the 4th slotted line 4 is mainly used in understands the influence of back production to adjacent boundary.
In the middle part of coal-face was advanced into slotted line, high-density electric carried out the data acquisition of resistivity.The high-density electric measurement mechanism can use the winner device or execute the Justin Lemberg device.Shown in Fig. 2 a, 2b, the high-density electric measurement mechanism comprises: power supply 10, transmitting electrode 20, potential electrode 30, signal picker 50.Power supply 10 is connected through lead 40 with transmitting electrode 20, potential electrode 30 with signal picker 50.
Wherein: power supply is connected with transmitting electrode; Transmitting electrode is that setting, potential electrode also are provided with in pairs in pairs; Potential electrode is connected with signal picker.
Three-dimensional high-density electric method is a kind of electrical resistivity survey method that the electrical property difference with rock soil mass is the basis, according in the regularity of distribution that applies electric field action sub-surface conduction current, infers that underground tax with geologic body of different resistivity deposits situation.Through A, 2 transmitting electrodes of locating of B to the underground electric current I that provides, the potential electrode measurements potential difference (PD) V that locates at M, 2 of N then, thus can try to achieve between M, the N point i.e. apparent resistivity value between the potential electrode.Can obtain the resistivity distribution situation in the stratum according to the apparent resistivity of actual measurement then.
On the every slotted line, the spread of electrodes between adjacent two electrodes can be 5m or 10 meters, and other test parameters can be debugged according to site test.
In step 102, gather a plurality of faces of land sand sample in test site, detect the resistivity of the soil pattern of a plurality of different water cut rates, obtain second resistivity data.
Preferably, gather face of land sand sample in test site, sample number is no less than 3.In the laboratory, carry out resistivity measurement under the sand different water cut rate.Preferably; Testing the sand water percentage respectively is: 5%, 10%, 15%, 20%, 30%, 50% and saturated (water percentage is 100%) water status under the resistivity of face of land sand sample; I.e. second resistivity data, thus draw the resistivity distribution of different water cut rate.Preferably, test environment conditions satisfies: temperature-20 ℃～60 ℃, humidity < 90%.During detection, based on aforementioned principles, transmitting electrode, reometer is measured its supply current, and signal picker is measured the potential difference (PD) between the potential electrode, calculates resistivity value then.Its proving installation is as shown in Figure 3, to sample electric current I is provided through A, 2 transmitting electrodes of locating of B, the potential difference (PD) V between M, 2 potential electrode of locating of N then, thereby through the voltage between M, the N point, calculated resistance rate value.
In step 103, first resistivity data and second resistivity data are compared, draw the water percentage of mining area surface sand layer.Particularly, the resistivity in the resistivity in first resistivity data and second resistivity data is compared, finds resistivity identical or close in second resistivity data, so obtain with this second resistivity data in the corresponding water percentage of resistivity.
In one embodiment:
According to geologic information; The coal seam buried depth of a known working face mining is about 200 meters; The work face width is 300 meters, then lays four slotted lines on the corresponding face of land of this workplace, and every slotted line is chosen for 2000 meters long according to coal seam buried depth and digging speed; The distance of cutting eye of slotted line start point distance workplace is the coal seam buried depth, promptly 200 meters.Spacing between each slotted line equates, is 120 meters.Crossheading is consistent under first slotted line 1 and the workplace; Second slotted line 2, the 3rd slotted line 3 lay respectively at workplace inside; The 4th slotted line 4 is stepped out 60 meters of coal faces, is in the unworked country, to be used to understand the influence of actual mining in the face of adjacent boundary.When 800 meters of working face extractions, carry out the high-density electric of 4 slotted lines and measure, the high-density electric measurement mechanism adopts the winner device, and the data that record can obtain the apparent resistivity of each bar slotted line after treatment, and then obtain resistivity.
In the present embodiment, on the other hand, surveying 3 groups in the collection face of land, district sand sample, shallow-layer is dived under water 2 groups.Process the sand sample of different water cut rate, and each sample is carried out the resistance parameter test, test result shows: the resistivity value that the sand dry state is measured is distributed in 5000～6500 Ω m, and water percentage is that 5% o'clock resistivity value is distributed in 120～300 Ω m; Water percentage is that 10% o'clock resistivity value is distributed in 100～150 Ω m; Water percentage is that 15% o'clock resistivity value is distributed in 80～120 Ω m; Water percentage is that 20% o'clock resistivity value is distributed in 60～100 Ω m; Water percentage is that 30% o'clock resistivity value is distributed in 40～60 Ω m; Water percentage is that 50% o'clock resistivity value is distributed in 30～50 Ω m; (water percentage is 100%) resistivity value is under the water state being full of: 20～40 Ω m.
Measured value and the measured value contrast of obtaining through the high-density electric measurement obtain the quantitative judgement that the face of land, the exploration area property of water-bearing distributes according to this.
Although the present invention describes through above-mentioned preferred implementation, its way of realization is not limited to above-mentioned embodiment.Should be realized that: under the situation that does not break away from purport of the present invention, those skilled in the art can make different variations and modification to the present invention.
Claims (8)
1. the electrical recognition methods of the mining-induced fissure band face of land, the mining area property of water-bearing under the drought condition is characterized in that, said method comprising the steps of:
A. utilize the high-density electric measurement mechanism, measure the resistivity of mining area surface sand layer, to obtain first resistivity data;
B. gather a plurality of faces of land sand sample in test site, detect the resistivity of the face of land sand sample of a plurality of different water cut rates, to obtain second resistivity data;
C. first resistivity data and second resistivity data are compared, draw the water percentage of mining area surface sand layer.
2. method according to claim 1 is characterized in that, the face of land sand sample of a plurality of different water cut rates comprises: water percentage is several in the face of land sand sample under 5%, 10%, 15%, 20%, 30%, 50% and 100% water status.
3. method according to claim 1 and 2 is characterized in that, the number of gathering face of land sand sample is more than or equal to three.
4. method according to claim 1 and 2 is characterized in that, in step a, test environment conditions satisfies: temperature-20 ℃～60 ℃, humidity < 90%.
5. method according to claim 1 and 2 is characterized in that, said high-density electric measurement mechanism is the winner device or executes the Justin Lemberg device.
6. method according to claim 1 and 2 is characterized in that, the high-density electric measurement mechanism comprises: power supply, transmitting electrode, potential electrode, signal picker, and wherein: power supply is connected with transmitting electrode; Transmitting electrode is that setting in pairs, potential electrode are for be provided with in pairs; Potential electrode is connected with signal picker.
7. method according to claim 6 is characterized in that, signal picker is connected between two potential electrode, measures magnitude of voltage between two potential electrode.
8. method according to claim 6 is characterized in that, transmitting electrode, potential electrode are laid on same the slotted line.
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| CN2012102570956A CN102778480A (en) | 2012-07-23 | 2012-07-23 | Electrically identifying method for aquosity of earth surface of mining-induced fissure zone of mining area under dry condition |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329081A (en) * | 2014-09-15 | 2015-02-04 | 中国石油大学(华东) | Method for calculating formation resistivity in subsequent period of water injection development of oil field |
| CN104535617A (en) * | 2014-12-26 | 2015-04-22 | 湖南万物工业软件有限公司 | Method and system for detecting water content in sandstone |
| CN104535621A (en) * | 2014-12-26 | 2015-04-22 | 湖南万物工业软件有限公司 | Method and system for detecting water content in sandstone |
| CN105116016A (en) * | 2015-08-26 | 2015-12-02 | 重庆大学 | Method for testing moisture content of saturated soil sample |
| CN109782357A (en) * | 2019-02-18 | 2019-05-21 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of method of ground Pumping Magnetic Resonance Method and high-density electric combined detection dam leakage |
| CN118050400A (en) * | 2024-04-01 | 2024-05-17 | 中国矿业大学 | Method for measuring water saturation of rock sample by adopting multi-electrode device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329081A (en) * | 2014-09-15 | 2015-02-04 | 中国石油大学(华东) | Method for calculating formation resistivity in subsequent period of water injection development of oil field |
| CN104535617A (en) * | 2014-12-26 | 2015-04-22 | 湖南万物工业软件有限公司 | Method and system for detecting water content in sandstone |
| CN104535621A (en) * | 2014-12-26 | 2015-04-22 | 湖南万物工业软件有限公司 | Method and system for detecting water content in sandstone |
| CN105116016A (en) * | 2015-08-26 | 2015-12-02 | 重庆大学 | Method for testing moisture content of saturated soil sample |
| CN105116016B (en) * | 2015-08-26 | 2018-01-09 | 重庆大学 | A kind of method for testing saturation Water Content Tests in Soil Samples |
| CN109782357A (en) * | 2019-02-18 | 2019-05-21 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of method of ground Pumping Magnetic Resonance Method and high-density electric combined detection dam leakage |
| CN118050400A (en) * | 2024-04-01 | 2024-05-17 | 中国矿业大学 | Method for measuring water saturation of rock sample by adopting multi-electrode device |
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Application publication date: 20121114 |