CN103759876A - Method for quickly detecting normal stress of compressive or shearing compressive structural plane - Google Patents
Method for quickly detecting normal stress of compressive or shearing compressive structural plane Download PDFInfo
- Publication number
- CN103759876A CN103759876A CN201310751593.0A CN201310751593A CN103759876A CN 103759876 A CN103759876 A CN 103759876A CN 201310751593 A CN201310751593 A CN 201310751593A CN 103759876 A CN103759876 A CN 103759876A
- Authority
- CN
- China
- Prior art keywords
- pressure
- structural plane
- test
- normal stress
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to a method for quickly detecting the normal stress of a compressive or shearing compressive structural plane. The technical problem needing to be solved is to provide the method for quickly detecting the normal stress of the compressive of shearing compressive structural plane. According to the technical scheme, the method comprises the steps that A, the drilling direction is determined according to the occurrence of the structural plane to conduct drilling; B, a drilling hole including the structural plane is sealed to form a testing section; C, water injection pressurization circulation tests are conducted on the testing section successively three times, and the pressure-time curve of the testing section is obtained; D, moulage is conducted on the testing section, the distribution feature of the structural plane in the hole wall is obtained, and the step of E is executed if pinniform fractures do not exist near the structural plane, the wall of the hole is complete and no new fractures exists on a rock section, and otherwise the step of A is executed; E, the inflection point of a pressure curve after a pressure valve is closed is obtained according to the pressure-time curve, and if the value difference of the inflection points in the later two times of tests is within 15%, an average value is used as the normal stress of the structural plane; otherwise, the value of the inflection point of the second time of test is used as the normal stress of the structural plane. The method for quickly detecting the normal stress of the compressive or the shearing compressive structural plane is applied to the field of water resources and hydropower engineering.
Description
Technical field
The present invention relates to a kind of structural plane normal stress rapid assay methods, particularly a kind of pressure property or pressure shear structural plane normal stress rapid assay methods, be mainly applicable to Hydraulic and Hydro-Power Engineering field.
Background technology
Current hydroenergy storage station both domestic and external and long diversion power station all may suffer from the situation of high pressure internal water pressure splitting structural texture face, and then cause a large amount of seepages, the safety of harm engineering operation phase.For the high hydraulic tunnel of internal water pressure, this class problem needs to pay close attention to especially, especially when there is the structural plane of advantage spread along the line in tunnel, the normal stress of determining typical structure becomes in hydraulic tunnel design needs clear and definite boundary condition, and this is also the Main Basis of determining steel lining or concrete lining scope.
Hydrofracturing earth stress measuring method comparative maturity in rockmass is holed in rock mass at present, and selects complete segment to test by core or sonic test data.By one section of complete boring of two separation scrapers sealing, form test section, then test section is carried out to packer permeability test, until the country rock of packing section is by distending crackle, and makes repeatedly setting-out circulation that crackle is fully expanded, record the pressure-time curve in multiple circulations; By die collecting test by the crackle of distending.Can be in the hope of least principal stress and the major principal stress on test section in conjunction with die result and pressure-time curve.
But also there is no the method for testing for structural plane normal pressure specially at present, the terrestrial stress method of testing of above-mentioned hydrofracturing is not suitable for the situation that packing section contains initial fissure.The present invention, on the basis of traditional hydrofracturing geostress survey technology, develops and measures measuring method smooth, closing structure face normal stress.
Summary of the invention
The technical problem to be solved in the present invention is: for the problem of above-mentioned existence, a kind of pressure easy and simple to handle is provided or presses shear structural plane normal stress rapid assay methods, can directly obtain normal stress smooth, closing structure face, not be subject to the impact of rock mass discontinuity mechanics parameter.
The technical solution adopted in the present invention is: pressure property or pressure shear structural plane normal stress rapid assay methods, is characterized in that step is as follows:
A, according to the occurrence of required mensuration structural plane, determine that boring direction holes, guarantee that boring is through required mensuration structural plane, the angle of simultaneously guaranteeing structural plane and drilling axis direction is 15-60 degree;
B, the localized borehole that adopts two packer packing closures to contain structural plane form test section, and the length that guarantees this test section is 0.5-0.8m, guarantee that the distance of structural plane disclosed partial distance packer in boring is not less than 0.15m simultaneously;
C, priority are carried out three water filling pressurized circulation tests to test section, obtain test section pressure-time curve; Each cyclic test cumulative time is not less than 5 minutes, comprises water filling pressurization, closing presure valve and recovers original pressure three phases; In process of the test, record the pressure data of two packers, and more than the maximum pressure large 2MPa of the pressure ratio of guaranteeing packer in twice test next while testing for the first time;
D, test section is carried out to die, obtain the Distribution Characteristics of structural plane at hole wall; If do not have pinnate fracture and hole wall rockmass section not to occur new crackle near structural plane, go to step E; Otherwise, go to step A;
E, the pressure-time curve obtaining according to step C, obtain the flex point of pressure curve after closing presure valve by the mode of mapping; If the value difference of this flex point, not in 15%, is got the normal stress of the two mean value as structural plane in testing for the second time and for the third time; Otherwise get the flex point value of test for the second time as the normal stress of structural plane.
In step C, three times water filling pressurized circulation test procedure is as follows:
C1, to water filling pressurization in test section, when flex point appears in pressure curve, close the pressure valve of compression system, this process control is at 1-2 minute; The decline of pressure process that simultaneously records test section, this stage continues at least 3 minutes; Then the water pressure of opening Water filling valve recovery test section is initial value, completes cyclic test for the first time;
C2, last cyclic test finished after 2 minutes, again, to water filling pressurization in test section, when flex point appears in pressure curve, closed the pressure valve of compression system, and this process control is at 1-2 minute; The decline of pressure process that simultaneously records test section, this stage continues at least 3 minutes; Then the water pressure of opening Water filling valve recovery test section is initial value, completes cyclic test for the second time;
C3, repeating step C2 complete cyclic test for the third time.
In steps A, adopt the drill bit of diameter 76mm to hole.
The invention has the beneficial effects as follows: the present invention is by carrying out three water filling pressurized circulation tests at test section, obtain test section pressure-time curve, and this curve is carried out to decipher, thereby directly obtain normal stress smooth, closing structure face, measurement result is not subject to the impact of rock mass discontinuity mechanics parameter.
Accompanying drawing explanation
Fig. 1 is structural drawing of the present invention.
Fig. 2 is the pressure-time curve figure of test section in the present invention.
Fig. 3 obtains pressure curve flex point schematic diagram after closing presure valve by mapping mode in Fig. 2.
Embodiment
As shown in Figure 1, the present embodiment utilizes the splitting feature of structural plane in packer permeability test, by decipher pressure-time (p-t) curve, obtain the normal pressure of structural plane, by water pressure distending structural plane, pressure in interrecord structure face opening and closing process changes, and by the numerical value of decipher pressure history acquisition structural plane normal stress, its step is as follows:
A, test zone is carried out to detailed mapping work, estimate to need structural plane 1 inclination angle and the extension condition of test.
The bit bore of B, employing 76mm diameter, and 2 structural planes 1 through required mensuration normal stress that guarantee to hole, adopt borehole camera and sound wave borehole camera 2 to scan holing simultaneously, determine the real attitude of required mensuration structural plane 1, by adjustment boring direction, making the angle of holing between 2 axis and structural plane 2 is 15～60 °.
It is that structural plane is all included in test section in the announcement length of boring section that C, two packers 3 of employing seal the localized borehole formation test section 4(that comprises structural plane 1), the length that guarantees this test section is 0.5-0.8m, guarantees that structural plane 1 is not less than 0.15m in the distance of boring 2 interior disclosed partial distance packers 3 simultaneously.
D, priority are carried out three water filling pressurized circulation tests to test section 4, obtain test section pressure-time curve, as shown in Figure 2; Each cyclic test cumulative time is not less than 5 minutes, comprises water filling pressurization, closing presure valve and recovers original pressure three phases; In process of the test, record the pressure data of two packers 3, and more than the maximum pressure large 2MPa of the pressure ratio of guaranteeing packer 3 in twice test next while testing for the first time.
Cyclic test for the first time: be first forced into parting pressure to the interior slow water filling of test section 4, be that flex point appears in pressure curve, close immediately the pressure valve of compression system and guarantee that Seepage does not appear in test section, this process (water filling pressure process) is controlled at 1-2 minute; After valve-off, record the decline of pressure process of test section 4, this stage (closing presure valve records decline of pressure process) continues at least 3 minutes; Then the water pressure of opening Water filling valve recovery test section 4 is initial value, approaches zero level.
Cyclic test for the second time: carry out cyclic test for the second time after cyclic test for the first time finishes 2 minutes, to the interior slow water filling pressurization of test section 4, when there is flex point in pressure curve, stop pressurization, close the pressure valve of compression system and guarantee that Seepage does not appear in test section, this process (water filling pressure process) is controlled at 1-2 minute; After valve-off, record the decline of pressure process of test section 4, this stage (closing presure valve records decline of pressure process) continues at least 3 minutes; Then the water pressure of opening Water filling valve recovery test section 4 is initial value, approaches zero level.
Cyclic test for the third time: identical with cyclic test for the second time.
E, test section 4 is carried out to die, obtain the Distribution Characteristics of structural plane 1 at hole wall; If do not have pinnate fracture, hole wall rockmass section not to occur new crackle near structural plane 1, go to step E; Otherwise test failure, goes to step A and re-starts test.
F, the pressure-time curve obtaining according to step D, obtain the flex point of pressure curve after closing presure valve, as shown in Figure 3 by the mode of mapping; If the value difference of this flex point, not in 15%, is got the normal stress of the two mean value as structural plane 1 in testing for the second time and for the third time; Otherwise (difference exceedes 15%) gets the flex point value of test for the second time as the normal stress of structural plane 1.
Claims (3)
1. pressure property or a pressure shear structural plane normal stress rapid assay methods, is characterized in that step is as follows:
A, according to the occurrence of required mensuration structural plane (1), determine that boring direction holes, guarantee that boring (2) is through required mensuration structural plane (1), guarantee that structural plane (1) and the angle of boring (2) axis direction are 15-60 degree simultaneously;
B, two packers of employing (3) seal the localized borehole that comprises structural plane (1) and form test section (4), the length that guarantees this test section is 0.5-0.8m, guarantees that the distance of structural plane (1) disclosed partial distance packer (3) in boring (2) is not less than 0.15m simultaneously;
C, priority are carried out three water filling pressurized circulation tests to test section (4), obtain test section pressure-time curve; Each cyclic test cumulative time is not less than 5 minutes, comprises water filling pressurization, closing presure valve and recovers original pressure three phases; In process of the test, record the pressure data of two packers (3), and more than the maximum pressure large 2MPa of the pressure ratio of guaranteeing packer (3) in twice test next while testing for the first time;
D, test section (4) is carried out to die, obtain the Distribution Characteristics of structural plane (1) at hole wall; If do not have pinnate fracture and hole wall rockmass section not to occur new crackle near structural plane (1), go to step E; Otherwise, go to step A;
E, the pressure-time curve obtaining according to step C, obtain the flex point of pressure curve after closing presure valve by the mode of mapping; If the value difference of this flex point, not in 15%, is got the normal stress of the two mean value as structural plane (1) in testing for the second time and for the third time; Otherwise get the flex point value of test for the second time as the normal stress of structural plane (1).
2. pressure according to claim 1 or pressure shear structural plane normal stress rapid assay methods, is characterized in that: in step C, three times water filling pressurized circulation test procedure is as follows:
C1, to the interior water filling of test section (4) pressurization, when flex point appears in pressure curve, close the pressure valve of compression system, this process control is at 1-2 minute; The decline of pressure process that simultaneously records test section (4), this stage continues at least 3 minutes; Then the water pressure of opening Water filling valve recovery test section (4) is initial value, completes cyclic test for the first time;
C2, last cyclic test finished after 2 minutes, again, to the interior water filling pressurization of test section (4), when flex point appears in pressure curve, closed the pressure valve of compression system, and this process control is at 1-2 minute; The decline of pressure process that simultaneously records test section (4), this stage continues at least 3 minutes; Then the water pressure of opening Water filling valve recovery test section (4) is initial value, completes cyclic test for the second time;
C3, repeating step C2 complete cyclic test for the third time.
3. pressure according to claim 1 and 2 or pressure shear structural plane normal stress rapid assay methods, is characterized in that: in steps A, adopt the drill bit of diameter 76mm to hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751593.0A CN103759876B (en) | 2013-12-31 | 2013-12-31 | Pressure property or pressure shear structural plane normal stress rapid assay methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751593.0A CN103759876B (en) | 2013-12-31 | 2013-12-31 | Pressure property or pressure shear structural plane normal stress rapid assay methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103759876A true CN103759876A (en) | 2014-04-30 |
| CN103759876B CN103759876B (en) | 2016-01-27 |
Family
ID=50527151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310751593.0A Active CN103759876B (en) | 2013-12-31 | 2013-12-31 | Pressure property or pressure shear structural plane normal stress rapid assay methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103759876B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818337A (en) * | 2006-03-27 | 2006-08-16 | 天地科技股份有限公司 | Testing method and apparatus for geological mechanics parameter under coal mine |
| JP2008267089A (en) * | 2007-04-25 | 2008-11-06 | Taisei Corp | Underground gas detection device and underground gas detection method |
| CN101514926A (en) * | 2009-03-20 | 2009-08-26 | 中国矿业大学 | Coal-rock mass ground stress continuous testing device and method thereof |
| WO2009130633A1 (en) * | 2008-04-23 | 2009-10-29 | Schlumberger Canada Limited | Rock stress modification technique |
| CN102536156A (en) * | 2012-02-15 | 2012-07-04 | 甘肃铁道综合工程勘察院有限公司 | High-voltage packer for measuring ground stress of deep hole and method for manufacturing rubber sleeve of packer |
| CN102589767A (en) * | 2012-02-24 | 2012-07-18 | 山东大学 | Rock core internal stress field test instrument and use method thereof |
| CN103472498A (en) * | 2013-09-25 | 2013-12-25 | 中国地震局地壳应力研究所 | Novel impression testing method for measuring hydrofracturing in-situ stress |
-
2013
- 2013-12-31 CN CN201310751593.0A patent/CN103759876B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818337A (en) * | 2006-03-27 | 2006-08-16 | 天地科技股份有限公司 | Testing method and apparatus for geological mechanics parameter under coal mine |
| JP2008267089A (en) * | 2007-04-25 | 2008-11-06 | Taisei Corp | Underground gas detection device and underground gas detection method |
| WO2009130633A1 (en) * | 2008-04-23 | 2009-10-29 | Schlumberger Canada Limited | Rock stress modification technique |
| CN101514926A (en) * | 2009-03-20 | 2009-08-26 | 中国矿业大学 | Coal-rock mass ground stress continuous testing device and method thereof |
| CN102536156A (en) * | 2012-02-15 | 2012-07-04 | 甘肃铁道综合工程勘察院有限公司 | High-voltage packer for measuring ground stress of deep hole and method for manufacturing rubber sleeve of packer |
| CN102589767A (en) * | 2012-02-24 | 2012-07-18 | 山东大学 | Rock core internal stress field test instrument and use method thereof |
| CN103472498A (en) * | 2013-09-25 | 2013-12-25 | 中国地震局地壳应力研究所 | Novel impression testing method for measuring hydrofracturing in-situ stress |
Non-Patent Citations (1)
| Title |
|---|
| 黄汲清: "中国地质科学的主要成就（三）", 《中国科技史料》, vol. 5, no. 1, 31 January 1984 (1984-01-31), pages 7 - 22 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103759876B (en) | 2016-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103900751B (en) | Borehole wire-line coring drilling rod two-circuit hydraulic fracturing detecting earth stress device and method of testing | |
| CN109342195B (en) | Method for testing bonding strength of first bonding surface of oil well cement | |
| CN102221712B (en) | Automatic testing method of wire line coring drilling hoisting-free pressurized water test | |
| AU2019201471B2 (en) | High-pressure self-locking packer and setting method thereof | |
| CN103510948B (en) | A kind of experimental technique being applicable to the prediction of brittle rock Well-bore Stability During Gas Drilling | |
| CN103015984A (en) | Method for measuring gas pressure of coal seam by casing high-pressure hole sealing method | |
| CN111577256B (en) | Quantitative evaluation method for permeability increasing effect of cross-layer drilling hydraulic punching | |
| CN110593811B (en) | Cement sheath initial stress state monitoring experiment method | |
| CN103195374B (en) | Method for designing salt rock stratum irregular-shaped sleeve | |
| CN110006760A (en) | A kind of method that Accurate Determining deep hole water pressure blasting fracturing induces rupture reopening pressure | |
| CN103939143B (en) | The assay method of heading zone of fracture influence basin and device thereof | |
| CN105134129A (en) | Gas extraction hole sealing method based on radial strong expansion | |
| CN109915070A (en) | The down-hole coal bed test gas pressure hole sealing device of one kind and method | |
| CN104005747B (en) | A kind of confined pressure hydraulic fracturing experiments device and using method thereof | |
| CN105804692A (en) | Novel coal mine gas pressure measurement grouting hole sealing method | |
| CN203822282U (en) | Confining pressure hydrofracture experimental facility | |
| CN105443071A (en) | Moving-down backwater blocking process method | |
| CN103196809A (en) | Measurement method of excavated damage area | |
| CN106761775A (en) | A kind of construction method of water-stop curtain | |
| CN106089174B (en) | The method in hydrofracturing chemically expansible agent filling speedy drivage tunnel | |
| CN103759876B (en) | Pressure property or pressure shear structural plane normal stress rapid assay methods | |
| CN204436370U (en) | Determination of coal seam gas pressure structure in fractured rock | |
| CN103806901A (en) | Oil well downhole rapid test system and test method | |
| CN112861393B (en) | Method for constructing envelope curve of performance of high-temperature and high-pressure packer | |
| Quirion et al. | Hydraulic jacking tests in crystalline rocks for hydroelectric projects in Quebec, Canada |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |