CN103538140A - Production method and device of geostress sensing column - Google Patents
Production method and device of geostress sensing column Download PDFInfo
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- CN103538140A CN103538140A CN201310494657.3A CN201310494657A CN103538140A CN 103538140 A CN103538140 A CN 103538140A CN 201310494657 A CN201310494657 A CN 201310494657A CN 103538140 A CN103538140 A CN 103538140A
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- triaxial pressure
- mold base
- upper cover
- locating
- hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
Abstract
The invention discloses a device of producing a geostress sensing column for deep soft rock geostress test. The device comprises a die base and a die upper cover which are closed to form a cylindrical cavity. Two ends of the die base are provided with clamping grooves used for inserting front and rear retaining boards. Two edges of the die base are provided with connecting holes. The die base can be fixed to fixing racks or die upper cover through mortise and tenon structures. Each fixing rack is provided with a positioning hole. A fixing head is inserted into each positioning hole and can move up and down and rotate and is fixed through a fixing bolt. The lower end of each fixing head is in the shape matching with the apex of a sensor. Each of the front and rear retaining boards is provided with a connecting hole, and the front and rear retaining boards are fixed to a fixing rack through mortise and tenon structures. The positioning rack is provided with two central positioning lasers and two edge positioning lasers. Beams from the central positioning lasers can vertically pass the positioning holes of the fixing racks. The device can be used to produce the geostress sensing column with cement mortar by casting, spatial correlation of two three-dimensional pressure boxes can be accurately positioned, and geostress can be calculated and measured.
Description
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Technical field
The invention belongs to ground field of measuring technique, relate to particularly a kind of preparation method and device of the crustal stress sensing post for the test of deep soft rock crustal stress.
Background technology
The Security Construction of coal mine roadway need to effectively be monitored country rock crustal stress.In the broken weak country rock in deep, colliery, conventional hydraulic fracturing and stress relief method all can not effectively be implemented.Wuhan Inst. of Rock and Soil Mechanics, Chinese Academy of Sciences has proposed a kind of " based on flow stress, recovering deep soft rock crustal stress method of testing and the device of principle " (patent 201210096644.6), utilize the characteristic of deep soft rock rheology under high-ground stress, realize the real-time and long term monitoring of soft rock crustal stress.While carrying out geostress survey, two triaxial pressure boxes need to be placed into a test point in boring, and record the angle between any two working face normal directions between two triaxial pressure boxes, by equation group, resolve and obtain the components of stress.Because broken weak borehole wall has a certain impact to propelling movement process, if separately two pressure cells are pushed to test point, its relative angle is difficult to accurately obtain.In order to make two pressure cells that relative displacement not occur and to push to rotatably position to be measured, can use in advance diameter and than measuring the smaller cement concrete cylinder of boring, two pressure cells be wrapped, send in boring, rheological behavior of surrounding rocks carries out transmission and the measurement of crustal stress after shrinking.The concrete cylindrical that includes so a pair of triaxial pressure box is called crustal stress sensing post.Because the measurement of crustal stress is very high to the required precision of two triaxial pressure box relative angles with calculating, the making of crustal stress sensing post needs the method for two pressure cells in the accurate and convenient location of a kind of energy.
Summary of the invention
Technical problem to be solved by this invention has been to provide preparation method and the producing device of the crustal stress sensing post of two pressure cells in the accurate and convenient location of a kind of energy.By these apparatus and method, can quick Fabrication go out stress sensing post, for recover the crustal stress test of principle, two triaxial pressure box relative angle registrations based on flow stress.
The object of the invention is to be achieved through the following technical solutions:
Make a device for crustal stress sensing post, comprise and be combined mold base and the mould upper cover that forms cylindrical cavity, there is draw-in groove at the two ends of described mold base, for inserting front apron and backboard; On two ribs of mold base, there is connecting hole, can by joinery and its construction, fix with fixed mount or mould upper cover;
On described fixed mount, have locating hole, gland is inserted locating hole and can be moved up and down and rotate, and is bolted; The lower end of described gland has the shape of agreeing with the summit of sensor;
On described front apron and backboard, also there is connecting hole, fix by joinery and its construction with locating rack; On locating rack, have two centralized positioning laser instruments and two crest line locating laser devices, the light beam of described centralized positioning laser instrument can be vertically by the locating hole on fixed mount.
On described front apron, also have by the fairlead of sensor conductor; On mould, cover the injected hole that is useful on slip casting.
Described gland is tubulose, for fixation of sensor.
As a kind of preferred, all parts except centralized positioning laser instrument and crest line locating laser device are all made of stainless steel.
The present invention also provides a kind of method of using said apparatus to make crustal stress sensing post, comprises the following steps:
(1) front apron is connected with mold base by draw-in groove with backboard, fixed mount is connected with mold base by connecting hole, locating rack is connected with backboard with front apron by connecting hole;
(2) open centralized positioning laser instrument, on mold base, have a hot spot, a summit of triaxial pressure box is overlapped with this hot spot, and another is intersected angular vertex and laser beam;
(3) from locating hole, insert gland, block triaxial pressure box, and rotation, make rib of triaxial pressure box crossing with the light beam that crest line locating laser device sends; Tighten set bolt;
(4) repeat (2) ~ (3) operation, fix another triaxial pressure box; The wire of two triaxial pressure boxes is drawn by the fairlead of front apron;
(5) in mold base, pour cement mortar into, be placed to initial set state, fix two triaxial pressure boxes;
(6) remove fixed mount and locating rack, upper cover loads a die; Injected hole injected water cement mortar by mould upper cover is extremely full; After solidifying, take out concrete column, obtain the crustal stress sensing post for the test of deep soft rock crustal stress.
The present invention has following beneficial effect and advantage: 1. can make rapidly and accurately the stress sensing post of deep soft rock crustal stress test use, high conformity; 2. accurately locate the space correlation of two triaxial pressure boxes, be beneficial to the calculate and measurement of crustal stress.
Accompanying drawing explanation
Fig. 1 is the mold shell structural representation of crustal stress sensing column production device.
1-mould upper cover, 2-front apron, 3-draw-in groove, 5-backboard, 6-connecting hole, 7-mold base, 15-injected hole.
Fig. 2 is the mounting structure schematic diagram of crustal stress sensing column production device.
8-locating rack, 9-fixed mount, 10-centralized positioning laser instrument, 11-crest line locating laser device, 12-fairlead, 16-triaxial pressure box.
Fig. 3 is fixed mount and sensor partial schematic diagram.
4-locating hole, 9-fixed mount, 13-bolt, 14-gland, 16-triaxial pressure box.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of device of making crustal stress sensing post, comprises and is combined mold base 7 and the mould upper cover 1 that forms cylindrical cavity, there is draw-in groove 3 at the two ends of described mold base 7, for inserting front apron 2 and backboard 5; On two ribs of mold base, there is connecting hole 6, can by joinery and its construction, fix with fixed mount 9 or mould upper cover 1;
On described fixed mount 9, have locating hole 4, gland 14 is inserted locating hole 4 and can be moved up and down and rotate, fixing by bolt 13; The lower end of described gland 14 has the shape of agreeing with the summit of triaxial pressure box;
On described front apron 2 and backboard 5, also there is connecting hole 6, fix by joinery and its construction with locating rack 8; On locating rack 8, have two centralized positioning laser instruments 10 and two crest line locating laser devices 11, the light beam of described centralized positioning laser instrument 10 can be vertically by the locating hole 4 on fixed mount 9.
On described front apron 2, also have by the fairlead 12 of triaxial pressure box wire; On mould upper cover 1, be useful on the injected hole 15 of slip casting.
Application said apparatus carries out the making of stress sensing post, comprises the following steps:
(1) front apron 2 is connected with mold base 7 by draw-in groove 3 with backboard 5, fixed mount 9 is connected with mold base 7 by connecting hole 6, locating rack 8 is connected with backboard 5 with front apron 2 by connecting hole 6;
(2) open centralized positioning laser instrument 10, on mold base 7, have a hot spot, a summit of triaxial pressure box 16 is overlapped with this hot spot, then make another to angular vertex and laser beam, intersect;
(3) from locating hole 4, insert gland 14, block triaxial pressure box 16, and rotation, make rib of triaxial pressure box 16 crossing with the light beam that crest line locating laser device sends; Tight a bolt 13, triaxial pressure box is fixed;
(4) repeat (2) ~ (3) operation, fix another triaxial pressure box; The wire of two triaxial pressure boxes is drawn by the fairlead 12 of front apron 2;
(5) in mold base 7, pour cement mortar into, be placed to initial set state, fix two triaxial pressure boxes;
(6) remove locating rack 8 and fixed mount 9, upper cover 1 loads a die.
(7) extremely full by three injected holes, the 15 injected water cement mortars of mould upper cover 1.
(8) after cement mortar is solidified, by removing backboard 5 and mould upper cover 1, the casting concrete cylinder of shaping is taken out, obtaining can be for the stress sensing post of boring build-in test.
Above-mentioned all parts except centralized positioning laser instrument 10 and crest line locating laser device 11 are all made of stainless steel, with what adapt to concrete mortar, repeat to build use.
As an engineering example, the inner cylinder space diameter that mould upper cover 1 and mold base 7 form is 13 centimetres, and length is 80 centimetres.Centralized positioning laser instrument 10 and crest line locating laser device 11 are semiconductor laser, as Changchun radium bodyguard 650nm red laser element, 1mw power, spot diameter 1mm.Triaxial pressure box 16 is cube, and catercorner length is slightly less than 13 centimetres.
During concrete use, first give the inner side brush releasing agent of mold base 7, adopt abovementioned steps to carry out the location and installation of two triaxial pressure boxes 16.The wire of two triaxial pressure boxes 16 is drawn by the fairlead 12 of front apron 2, and blocks remaining space between fairlead 12 and wire with flexible material.For colliery km deep wall rock strength range, adopt C5 to build to the cement concrete mortar of C10 label.Use high speed vibrator to carry out the operation of vibrating of concrete mortar.After concrete mortar initial set (approximately 45 minutes time), take locating rack 8, fixed mount 9 away.Give the inner side brush releasing agent of mould upper cover 1, the upper cover 1 that loads a die coincide with mould lower cover 7, extremely full by three injected holes, 15 injected water cement mortars, and the operation of vibrating.After cement mortar final set (approximately 8 hours), by removing backboard 5 and mould upper cover 1, the casting concrete cylinder of shaping is taken out, obtaining can be for the stress sensing post of boring build-in test.
Claims (6)
1. a device of making crustal stress sensing post, it is characterized in that, comprise and be combined mold base (7) and the mould upper cover (1) that forms cylindrical cavity, there is draw-in groove (3) at the two ends of described mold base (7), for inserting front apron (2) and backboard (5); On two ribs of mold base, there is connecting hole (6), can by joinery and its construction, fix with fixed mount (9) or mould upper cover (1);
On described fixed mount (9), have locating hole (4), gland (14) is inserted locating hole (4) and can be moved up and down and rotate, fixing by bolt (13); The lower end of described gland (14) has the shape of agreeing with the summit of three-dimensional sensor;
On described front apron (2) and backboard (5), also there is connecting hole (6), fix by joinery and its construction with locating rack (8); On locating rack (8), have two centralized positioning laser instruments (10) and two crest line locating laser devices (11), the light beam of described centralized positioning laser instrument (10) can vertically pass through the locating hole (4) on fixed mount (9).
2. device according to claim 1, is characterized in that, described front apron (2) is upper to be also had by the fairlead (12) of three-dimensional sensor conductor; On mould upper cover (1), be useful on the injected hole (15) of slip casting.
3. device according to claim 1, is characterized in that, described gland (14) is tubulose.
4. device according to claim 1, is characterized in that, all parts except centralized positioning laser instrument and crest line locating laser device are all made of stainless steel.
5. right to use requires the method that described in 1, device is made crustal stress sensing post, comprises the following steps:
1) front apron (2) is connected with mold base (7) by draw-in groove (3) with backboard (5), fixed mount (9) is connected with mold base (7) by connecting hole (6), locating rack (8) is connected with backboard (5) with front apron (2) by connecting hole (6);
2) open centralized positioning laser instrument (10), on mold base (7), have a hot spot, a summit of triaxial pressure box (16) is overlapped with this hot spot, then make another to angular vertex and laser beam, intersect;
3) from locating hole (4), insert gland (14), block triaxial pressure box (16), and rotation, make a rib of triaxial pressure box (16) crossing with the light beam that crest line locating laser device (11) sends; Tight a bolt (13), make triaxial pressure box (16) fixing;
4) repeat (2) ~ (3) operation, fix another triaxial pressure box; The wire of two triaxial pressure boxes is drawn by the fairlead (12) of front apron (2);
5) in mold base (7), pour cement mortar into, be placed to initial set state, fix two triaxial pressure boxes;
6) remove fixed mount (9) and locating rack (8), the upper cover that loads a die (1); Injected hole (15) injected water cement mortar by mould upper cover (1) is extremely full; After solidifying, take out concrete column, obtain the crustal stress sensing post for the test of deep soft rock crustal stress.
6. method according to claim 5, is characterized in that, described triaxial pressure box is cube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310494657.3A CN103538140B (en) | 2013-10-21 | 2013-10-21 | The preparation method of crustal stress sensing post and device |
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| CN201310494657.3A CN103538140B (en) | 2013-10-21 | 2013-10-21 | The preparation method of crustal stress sensing post and device |
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| CN103538140B CN103538140B (en) | 2016-03-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849433A (en) * | 2015-05-30 | 2015-08-19 | 重庆地质矿产研究院 | Experimental device and method for testing magnitude of crustal stress of cylindrical rock core |
| CN110608835A (en) * | 2017-09-09 | 2019-12-24 | 韩少鹏 | Soft rock ground stress testing device and soft rock ground stress testing method for geotechnical exploration engineering |
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| DE4307252A1 (en) * | 1992-03-09 | 1993-09-16 | Noranda Inc | Measuring three=dimensional stress in rock surrounding borehole - measuring strain deformation adjacent to slots cut into borehole wall at different angles. |
| SI20086A (en) * | 1998-10-05 | 2000-04-30 | Inštitut Za Rudarstvo, Geotehnologijo In Okolje | Cell for measurement of three-dimensional stress state within rock |
| CN102628716A (en) * | 2012-04-05 | 2012-08-08 | 中国科学院武汉岩土力学研究所 | Method and device for testing geo-stress in deep soft rock based on flow stress restoration principle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1171676A1 (en) * | 1984-05-14 | 1985-08-07 | Новосибирский государственный университет им.Ленинского комсомола | Device for measuring rock pressure in well |
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2013
- 2013-10-21 CN CN201310494657.3A patent/CN103538140B/en active Active
Patent Citations (3)
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| DE4307252A1 (en) * | 1992-03-09 | 1993-09-16 | Noranda Inc | Measuring three=dimensional stress in rock surrounding borehole - measuring strain deformation adjacent to slots cut into borehole wall at different angles. |
| SI20086A (en) * | 1998-10-05 | 2000-04-30 | Inštitut Za Rudarstvo, Geotehnologijo In Okolje | Cell for measurement of three-dimensional stress state within rock |
| CN102628716A (en) * | 2012-04-05 | 2012-08-08 | 中国科学院武汉岩土力学研究所 | Method and device for testing geo-stress in deep soft rock based on flow stress restoration principle |
Non-Patent Citations (1)
| Title |
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| 许文龙: "三向压力盒地应力测试及反演方法研究", 《工程科技Ⅰ辑》, 30 June 2012 (2012-06-30), pages 27 - 46 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849433A (en) * | 2015-05-30 | 2015-08-19 | 重庆地质矿产研究院 | Experimental device and method for testing magnitude of crustal stress of cylindrical rock core |
| CN110608835A (en) * | 2017-09-09 | 2019-12-24 | 韩少鹏 | Soft rock ground stress testing device and soft rock ground stress testing method for geotechnical exploration engineering |
| CN110608835B (en) * | 2017-09-09 | 2021-03-09 | 山东东信岩土工程有限公司 | Soft rock ground stress testing device and soft rock ground stress testing method for geotechnical exploration engineering |
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| CN103538140B (en) | 2016-03-30 |
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