CN1021602C - Electric measuring method of depth under well - Google Patents
Electric measuring method of depth under well Download PDFInfo
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- CN1021602C CN1021602C CN 87104959 CN87104959A CN1021602C CN 1021602 C CN1021602 C CN 1021602C CN 87104959 CN87104959 CN 87104959 CN 87104959 A CN87104959 A CN 87104959A CN 1021602 C CN1021602 C CN 1021602C
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Abstract
The present invention discloses a method for measuring depth by electricity underground. A direct-current pressure boosting and electricity supplying device and an electric sounding curve interpreting method for determining a potential water bursting point of ordovician limestone water are used. The method can be used for detecting the confiningbed thickness of a bottom board of an underground roadway, the potential water bursting point and the water guiding height of the ordovician limestone water, the construction of a buried fault of the bottom board of the roadway and a subsidence column, searching water sources, etc. The method has the advantages of portable equipment and intuitive measurement result, and is a new method for the underground water prevention and treatment of a coal mine.
Description
The present invention proposes a kind of electric measuring method of depth that is applicable to the down-hole.
Lime Permian period coalfield, China North China is organized coal (little blue or green coal, smalt coal, undercarriage coal) down near Ordovician limestone High Voltage water-bearing zone, along with the increase of mining depth, the head pressure in the Ordovician limestone water-bearing zone is increasing, and (pressure that now can adopt the degree of depth reaches 12～18kg/cm
2), in progress of coal mining, the danger of the outstanding and inundated mine of Ordovician karst water is arranged all at any time.In the mining under safe waterpressure of aquifer process, verify the thickness of roadway floor water-resisting layer, cranny structure development degree and be the vital task of mine water management and safety in production by the potential projective water point (as shown in Figure 1) that fissure zone and minor fault cause.The way of general at present employing down hole drill is verified above-mentioned tectonic structure, and its shortcoming is that expense height, efficient are low, and the equipment heaviness is dangerous.
In order to address the above problem, we are applied to the ground resistivity soun ding down-hole exploration first and it have been done deep research on the basis of extensively investigation.Resistivity soun ding is by the research to artificial electric field distribution law, seek concealed orebody and a kind of geophysical exploration method that solves relevant geological problem, its advantage is that instrument and equipment is simple, high efficiency, be widely used at present the ground general surveing exploration of various mineral products, obtained a lot of good achievements.But, for we show to the computer search result that Patent Office of the People's Republic of China carries out, do not find one piece of documents and materials that are used for the down-hole exploration about resistivity soun ding through coal ministry patentservice center.
Will be used for the down-hole exploration to the ground resistivity soun ding, need to solve the technical matters of many aspects, the major technology problem is the interpretation procedure of electrical sounding curve and the method for supplying power to that resistivity soun ding is measured.The ground electrical sounding exploration degree of depth big (can reach km), the detection of a target is some bigger ore body and tectonic structures, generally all adopt logarithmic coordinate to draw electrical sounding curve, therefore, can not reflect less tectonic structure on the curve, and existing curve interpretation procedure of the electric sounding is only applicable to explain bigger geologic body and tectonic structure, also must develop to be fit to the curve interpretation procedure of the electric sounding that little structure is surveyed in the down-hole.First and second batteries are generally all adopted in ground DC detecting deep exploration at present, with the way change supply voltage of increase and decrease battery.Will bring up to 400V to supply voltage, need serial connection 266 joints first and second batteries, every batteries nearly weighs 1kg, and volume is about 0.012m
3, general assembly (TW) will reach 266kg, and cumulative volume reaches 3m
3, if with light little collection dress alkaline battery, weight also reaches about 150kg, and so the power supply of large volume is used for the ground exploration, and available automobile transportation be unusual difficulty but use this power supply in narrow tunnel, down-hole, and the plus-minus battery is also very inconvenient.
The objective of the invention is to invent a kind of down-hole that is applicable to and survey the small-sized architectonic electric measuring method of depth under well such as fissure zone, minor fault and potential projective water point in grey interface difficult to understand, the water-resisting layer.
The present invention has adopted a kind of DC boosting electric supply installation, with a group storage battery through vibration, alternation, boost, rectifying conversion is the adjustable direct current boosting power with a plurality of class; Adopt rectangular coordinate to draw electrical sounding curve, horizontal ordinate X is apparent resistivity ρ
s, ordinate Y(direction is down) and be the AB/2 that fathoms; Adopted a kind of curve interpretation procedure of the electric sounding that can determine the potential projective water point of Ordovician limestone geopressured aquifer, promptly two features that show on electrical sounding curve according to the potential projective water point in this water-bearing zone are judged the potential projective water point in the seat earth rock stratum.One of feature is the apparent resistivity ρ on a certain depth point
sReduce by general resistivity value suddenly, it is many between 1/3～1/2 greater than the 1/3(of whole water-resisting layer average resistivity value that resistivity reduces amplitude), two of feature is that this is put between the interface, Ordovician limestone top and does not have resistive formation, show as the high resistant peak value that does not occur greater than general resistivity value on the electrical sounding curve, meet the apparent resistivity ρ of above-mentioned two features
sCatastrophe point be defined as the potential projective water point of Ordovician limestone geopressured aquifer.
The invention is further described below in conjunction with embodiment and accompanying drawing.
Fig. 1 is the seat earth sectional view, 1-undercarriage coal seam; The 2-seat earth is adopted the back collapse dept; The potential projective water point of 3-; The different rise of 4-; The 5-effective water-resisting layer thickness; 6-Ordovician limestone geopressured aquifer.
Fig. 2 is the schematic diagram of resistivity soun ding.
Fig. 3 is four utmost point symmetric arrangement mode synoptic diagram.
Fig. 4 is three utmost point arrangement synoptic diagram.
Fig. 5 is a dipole equatorial arrangement synoptic diagram.
The down-hole electrical sounding curve figure of Fig. 6 in rectangular coordinate system, drawing, the potential projective water point of A-; B-Ordovician limestone interface.
The down-hole electrical sounding exploration generally carries out in the tunnel, utilize DC boosting electric supply installation and electrodes of A B to power over the ground, produce artificial electric field, utilize electric method meter and potential electrode MN to measure the potential difference (PD) △ U of any point-to-point transmission of roadway floor and the strength of current I of artificial electric field
AB, utilize formula ρ
S=K (Δ U
MN)/(I
A6) calculate apparent resistivity ρ
s, wherein K is the electrode assembly coefficient, it is relevant with the arrangement of electrode assembly.The MN pole span immobilizes, and the AB pole span enlarges by certain offset distance, and H fathoms
AB/2 measures apparent resistivity ρ on its corresponding depth point to each AB pole span
s, along with the expansion of electrode A B, investigation depth strengthens gradually, finally draws the apparent resistivity ρ on this measuring point stratum in rectangular coordinate
sWith the electrical sounding curve of investigation depth AB/2 variation, as shown in Figure 2.Electrode has multiple arrangement, as four utmost point symmetric arrangement modes, three utmost point arrangements and dipole equatorial arrangement etc.
Four utmost point symmetrical mountings as shown in Figure 3, promptly electrode A, M, N, B are symmetrical in central point O(measurement point) arrange, MO=ON, AO=OB, the distance of potential electrode MN is 1/3rd～30 of an electrodes of A B distance, generally selects 1/10th for use.China's North China coal two selects the seat earth of discipline coalfield foot to have only about 20m apart from Ordovician limestone geopressured aquifer interface, potential electrode MN generally selects 2m for use when exploring in the down-hole, the offset distance of electrodes of A B generally adopts 2m, 1m or 0.5m according to required investigation depth and precision.On same measuring point, along with the expansion of electrodes of A B, investigation depth strengthens gradually, investigation depth H
AB/2, four utmost point symmetry electrode electrode coefficient K=π (AMAN)/(MN).Three utmost point arrangements as shown in Figure 4, kind electrode arrangement and four utmost point symmetric arrangement modes are basic identical, just transmitting electrode B is arranged in advance 3～5 times of AO of distance measurement point at a distance, under the situation of acline, the measured apparent resistivity value of three-pole device and four utmost point symmetrical mountings is identical, three-pole device COEFFICIENT K=2 π (AMAN)/(MN).The dipole equatorial arrangement as shown in Figure 5, the MN of four utmost point symmetrical mountings is taken out outside the AB, as two dipoles, a power supply (AB), another measurement (MN), just constituted dipole equatorial depth measurement arrangement, the AB mid point is called spread of electrodes r to the distance of MN mid point, during work, the same with four extremely symmetrical depth measurements, pole span r is extremely increased by little greatly gradually by geometric series, the variation of observation voltage difference △ U on the MN dipole, thus draw apparent resistivity ρ
sWith the change curve that pole span r increases, dipole equatorial electrode coefficient K=π (ANAM)/(AN-AM).
The DC boosting electric supply installation that the present invention adopts be ickel-cadmium cell with one group of 26V through vibration, alternation, boost, rectifying conversion is for having 11 class, voltage can change to the DC boosting power supply source of 400V from 10V.Whole device has only 8kg heavy, and volume is 350 * 250 * 200mm, can be according to the stake resistance size of electrodes of A B, pull knob easily and change supply voltage,, charge after work to reach satisfied measurement effect, do not need often to change battery,, very easy to use in the down-hole.
Can utilize the interpretation procedure of conventional electrical sounding curve to determine the interface and the thickness in water-bearing zone, promptly determine interface, water-bearing zone and thickness according to the flex point on the electrical sounding curve.Two principal characters utilizing the potential projective water point of the Ordovician limestone geopressured aquifer that the present invention proposes to reflect on electrical sounding curve are determined seat earth because the potential projective water point that fissure zone or minor fault cause.One of feature is the apparent resistivity value ρ on a certain depth point
sReduce by general resistivity value suddenly, it is many between 1/3～1/2 greater than the 1/3(of whole water-resisting layer average resistivity value that resistivity reduces amplitude), two of feature is that this is put between the interface, Ordovician limestone top and does not have resistive formation, show as the high resistant peak value that does not occur greater than general resistivity value on the curve, meet the apparent resistivity ρ of above two features
sCatastrophe point can be defined as the potential projective water point of Ordovician limestone geopressured aquifer, as shown in Figure 5.The A point is potential projective water point, and the B point is interface, Ordovician limestone top.The absolute value of the depth difference between potential projective water point A and the Ordovician limestone top interface B is exactly the different water height of Ordovician limestone geopressured aquifer, be the concrete height that water under high pressure rises to floor strata, verify the position of potential projective water point and rising height and harness the river and safety in production is crucial for the down-hole is anti-.
Show through the researchs in 3 years and test: the down-hole resistivity soun ding that the present invention proposes is at the impermeable layer thickness of surveying roadway floor, the potential projective water point and the rising height of Ordovician karst water, the aspect has obtained gratifying result to survey the potential fault structure and the karst collapse col umn of roadway floor and seek sources of water etc.This method equipment is light, simple to operate, personnel selection less, fast, the intuitive measurement results of speed, be anti-a kind of effective new method of harnessing the river under the coal mine.
Claims (1)
1, a kind of employing transmitting electrode (A) and (B), potential electrode (M) and (N) and the colliery electric measuring method of depth under well of electric method meter, it is characterized in that:
(1) a kind of portable tunable voltage dc power supply case, electric method meter, fixation measuring electrode (MN), the measuring method in the coal mine roadway of mobile transmitting electrode (AB) have been adopted;
(2) adopted rectangular coordinate to draw electrical sounding curve, horizontal ordinate X is apparent resistivity value ρ
s, ordinate Y (direction down) is (AB)/2 that fathom;
(3) adopted the potential projective water point sounding curve interpretation procedure of definite Ordovician limestone geopressured aquifer, potential projective water point is having two principal characters on the electrical sounding curve: one of feature is the apparent resistivity ρ on a certain depth point
SBy the unexpected step-down of general resistivity value, resistivity reduces by 1/3 (how 1/3～1/2 between) of amplitude greater than whole water-resisting layer average resistivity value; Two of feature is that this is put between the interface, Ordovician limestone top and does not have resistive formation, shows as the high resistant peak value that does not occur greater than general resistivity value on the curve, meets the electric rate ρ of looking of above-mentioned two features
SCatastrophe point is the potential projective water point of Ordovician limestone geopressured aquifer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104959 CN1021602C (en) | 1987-07-27 | 1987-07-27 | Electric measuring method of depth under well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104959 CN1021602C (en) | 1987-07-27 | 1987-07-27 | Electric measuring method of depth under well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1030982A CN1030982A (en) | 1989-02-08 |
| CN1021602C true CN1021602C (en) | 1993-07-14 |
Family
ID=4815085
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87104959 Expired - Fee Related CN1021602C (en) | 1987-07-27 | 1987-07-27 | Electric measuring method of depth under well |
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| CN (1) | CN1021602C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100403351C (en) * | 2006-04-14 | 2008-07-16 | 西安澳立华勘探技术开发有限公司 | Fully-automatic multi-channel multi-electrode electric-method data acquisition system and its method |
| CN101373220B (en) * | 2008-08-25 | 2010-12-15 | 杨佃俊 | Ground water duplex electric testing method |
| CN101435787B (en) * | 2008-12-19 | 2012-05-23 | 天津录能泰矿用技术有限公司 | Three-dimensional high-density electric method instrument |
| CN102147483B (en) * | 2010-12-30 | 2013-01-02 | 杨佃俊 | Groundwater-recharge bipolar double-meter electric well logging method |
| CN102176058B (en) * | 2011-03-01 | 2013-04-03 | 中国有色金属工业昆明勘察设计研究院 | Device for IP (induced polarization) measurement of adjustable electrode distance in SDJ-KT hole |
| CN104237328A (en) * | 2013-10-22 | 2014-12-24 | 王磊 | High polymer grouting curtain defect detection system for dam body |
| CN104767093B (en) * | 2015-03-27 | 2017-01-04 | 中国矿业大学 | A kind of mine direct current electric sounding data acquisition cable and method |
| CN107941555A (en) * | 2017-11-20 | 2018-04-20 | 中国矿业大学 | A kind of well depthkeeping degree water-bearing layer water sampler that can determine whether underground water cross strata pollution |
| CN109059833B (en) * | 2018-08-09 | 2019-05-24 | 山东科技大学 | Artesian water leads a liter band method for determining height under temperature-action of seepage-stress coupling |
| CN109521476B (en) * | 2018-11-29 | 2020-05-26 | 长江勘测规划设计研究有限责任公司 | Dyke resistivity tomography observation system |
| CN110333543B (en) * | 2019-07-03 | 2020-07-31 | 山东大学 | Low-resistance body interpretation and imaging method and system based on reflection coefficient analysis |
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1987
- 1987-07-27 CN CN 87104959 patent/CN1021602C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1030982A (en) | 1989-02-08 |
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