CN103538140B - The preparation method of crustal stress sensing post and device - Google Patents
The preparation method of crustal stress sensing post and device Download PDFInfo
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- CN103538140B CN103538140B CN201310494657.3A CN201310494657A CN103538140B CN 103538140 B CN103538140 B CN 103538140B CN 201310494657 A CN201310494657 A CN 201310494657A CN 103538140 B CN103538140 B CN 103538140B
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- mold base
- triaxial pressure
- positioning laser
- front apron
- fixed mount
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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
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of device making the crustal stress sensing post of deep soft rock detecting earth stress, comprise the mold base and mould upper cover that are combined and form cylindrical space, there is draw-in groove at the two ends of mold base, for inserting front apron and backboard; Two ribs of mold base there is connecting hole, can be fixed by joinery and its construction with fixed mount or mould upper cover; Fixed mount has locating hole, and gland is inserted locating hole and can be moved up and down and rotate, and is fixed by set bolt; The lower end of gland has the shape of agreeing with the summit of sensor; Front apron and backboard also there is connecting hole, is fixed by joinery and its construction with locating rack; Locating rack has two centralized positioning laser instruments and two crest line positioning laser, the light beam of centralized positioning laser instrument can perpendicular through the locating hole on fixed mount.Use this device to build with cement mortar and make crustal stress sensing post, accurately the spatial correspondences of two the triaxial pressure boxes in location, is beneficial to calculating and the measurement of crustal stress.
Description
Technical field
The invention belongs to ground field of measuring technique, relate to a kind of preparation method and device of the crustal stress sensing post for deep soft rock detecting earth stress particularly.
Background technology
The Security Construction of coal mine roadway needs effectively to monitor country rock crustal stress.In the country rock of colliery deep crush weakness, conventional hydraulic fracturing and stress relief method all can not effectively be implemented.Wuhan Inst. of Rock and Soil Mechanics, Chinese Academy of Sciences proposes one and " recovers the deep soft rock detecting earth stress method and apparatus of principle based on flow stress " (patent 201210096644.6), utilize deep soft rock in the characteristic of the dirty change of high-ground stress, realize the real-time of soft rock crustal stress and long term monitoring.When carrying out geostress survey, need the test point be placed into by two triaxial pressure boxes in boring, and record the angle between two triaxial pressure boxes between any two working face normal directions, resolved by equation group 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, then its relative angle is difficult to accurately obtain.There is not relative displacement to make two pressure cells and push to position to be measured rotatably, two pressure cells wrap by the cement concrete cylinder that diameter can be used in advance more smaller than measurement boring, send in boring, rheological behavior of surrounding rocks carries out transmission and the measurement of crustal stress after shrinking.The concrete cylindrical including a pair triaxial pressure box is like this called crustal stress sensing post.Because the required precision of surveying and calculating to two triaxial pressure box relative angles of crustal stress is very high, the making of crustal stress sensing post needs a kind of energy accurate and the method for two pressure cells in convenient location.
Summary of the invention
Technical problem to be solved by this invention there are provided a kind of energy accurate and the preparation method of the crustal stress sensing post of two pressure cells in convenient location and producing device.By these apparatus and method, quick Fabrication can go out stress sensing post, for recovering the detecting earth stress of principle based on flow stress, two triaxial pressure box relative angle registrations.
The object of the invention is to be achieved through the following technical solutions:
Make a device for crustal stress sensing post, comprise the mold base and mould upper cover that are combined and form cylindrical cavity, there is draw-in groove at the two ends of described mold base, for inserting front apron and backboard; Two ribs of mold base there is connecting hole, can be fixed by joinery and its construction with fixed mount or mould upper cover;
Described fixed mount has locating hole, and 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;
Described front apron and backboard also there is connecting hole, is fixed by joinery and its construction with locating rack; Locating rack has two centralized positioning laser instruments and two crest line positioning laser, the light beam of described centralized positioning laser instrument can perpendicular through the locating hole on fixed mount.
Described front apron also has the fairlead by sensor conductor; Mould cover useful in the injected hole of slip casting.
Described gland is tubulose, for fixation of sensor.
Preferred as one, all parts except centralized positioning laser instrument and crest line positioning laser all make of stainless steel.
Present invention also offers a kind of method using said apparatus to make crustal stress sensing post, comprise 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 front apron and backboard by connecting hole;
(2) open centralized positioning laser instrument, mold base has a hot spot, a summit of triaxial pressure box is overlapped with this hot spot, and makes another crossing with laser beam to angular vertex;
(3) from locating hole, insert gland, block triaxial pressure box, and rotate, make triaxial pressure box rib crossing with the light beam that crest line positioning laser 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, load a die upper cover; Cement mortar is injected to full by the injected hole of mould upper cover; After solidifying, take out concrete column, obtain the crustal stress sensing post for deep soft rock detecting earth stress.
The present invention has following beneficial effect and advantage: the stress sensing post that 1. can make deep soft rock detecting earth stress rapidly and accurately, and uniformity is good; 2. accurately locate the spatial correspondences of two triaxial pressure boxes, be beneficial to calculating and the 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 positioning laser, 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.
Detailed description of the invention
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 making crustal stress sensing post, comprise the mold base 7 and mould upper cover 1 that are combined and form 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; Two ribs of mold base there is connecting hole 6, can be fixed by joinery and its construction with fixed mount 9 or mould upper cover 1;
Described fixed mount 9 has locating hole 4, and gland 14 is inserted locating hole 4 and can be moved up and down and rotate, and is fixed by bolt 13; The lower end of described gland 14 has the shape of agreeing with the summit of triaxial pressure box;
Described front apron 2 and backboard 5 also there is connecting hole 6, is fixed by joinery and its construction with locating rack 8; Locating rack 8 has two centralized positioning laser instruments 10 and two crest line positioning laser 11, the light beam of described centralized positioning laser instrument 10 can perpendicular through the locating hole 4 on fixed mount 9.
Described front apron 2 also has the fairlead 12 by triaxial pressure box wire; Mould upper cover 1 there is the injected hole 15 for 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 front apron 2 and backboard 5 by connecting hole 6;
(2) open centralized positioning laser instrument 10, mold base 7 has a hot spot, a summit of triaxial pressure box 16 is overlapped with this hot spot, then makes another crossing with laser beam to angular vertex;
(3) from locating hole 4, insert gland 14, block triaxial pressure box 16, and rotate, make triaxial pressure box 16 rib crossing with the light beam that crest line positioning laser 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, load a die upper cover 1.
(7) cement mortar is injected to full by three injected holes 15 of mould upper cover 1.
(8) after cement mortar is solidified, the casting concrete cylinder that will be shaped by removing backboard 5 and mould upper cover 1 takes out, and obtaining can for the stress sensing post of build-in test of holing.
Triaxial pressure box 16 shape is generally cube.
Above-mentioned all parts except centralized positioning laser instrument 10 and crest line positioning laser 11 all with stainless steel make, with adapt to concrete mortar repeat 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 positioning laser 11 are semiconductor laser, as Changchun radium bodyguard 650nm red laser element, and 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, the cement concrete mortar of C5 to C10 label is adopted to build.High speed vibrator is used to carry out the operation of vibrating of concrete mortar.After concrete mortar initial set (about 45 minutes time), take locating rack 8, fixed mount 9 away.To 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, injects cement mortar to full, and carry out operation of vibrating by three injected holes 15.After cement mortar final set (about 8 hours), the casting concrete cylinder that will be shaped by removing backboard 5 and mould upper cover 1 takes out, and obtaining can for the stress sensing post of build-in test of holing.
Claims (5)
1. one kind makes the device of crustal stress sensing post, it is characterized in that, comprise the mold base (7) and mould upper cover (1) that are combined and form 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); Two ribs of mold base there is connecting hole (6), can be fixed by joinery and its construction with fixed mount (9) or mould upper cover (1);
Described fixed mount (9) has locating hole (4), gland (14) is inserted locating hole (4) and can be moved up and down and rotate, and is fixed by bolt (13); The lower end of described gland (14) has the shape of agreeing with the summit of triaxial pressure box;
Described front apron (2) and backboard (5) also there is connecting hole (6), is fixed by joinery and its construction with locating rack (8); Locating rack (8) there are two centralized positioning laser instruments (10) and two crest line positioning laser (11), the light beam of described centralized positioning laser instrument (10) can perpendicular through the locating hole (4) on fixed mount (9), the upper fairlead (12) also had by triaxial pressure box wire of described front apron (2); Mould upper cover (1) there is the injected hole (15) for slip casting.
2. device according to claim 1, is characterized in that, described gland (14) is tubulose.
3. device according to claim 1, is characterized in that, all parts except centralized positioning laser instrument and crest line positioning laser all make of stainless steel.
4. use device described in claim 1 to make the method for crustal stress sensing post, comprise 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 front apron (2) and backboard (5) by connecting hole (6);
2) open centralized positioning laser instrument (10), mold base (7) has a hot spot, a summit of triaxial pressure box (16) is overlapped with this hot spot, then makes another crossing with laser beam to angular vertex;
3) from locating hole (4), insert gland (14), block triaxial pressure box (16), and rotate, make a rib of triaxial pressure box (16) crossing with the light beam that crest line positioning laser (11) sends; Tight a bolt (13), and triaxial pressure box (16) is fixed;
4) 2 are repeated) ~ 3), 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) fixed mount (9) and locating rack (8) is removed, the upper cover that loads a die (1); Cement mortar is injected to full by the injected hole (15) of mould upper cover (1); After solidifying, take out concrete column, obtain the crustal stress sensing post for deep soft rock detecting earth stress.
5. method according to claim 4, 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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| CN103538140A CN103538140A (en) | 2014-01-29 |
| CN103538140B true CN103538140B (en) | 2016-03-30 |
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Families Citing this family (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 |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1171676A1 (en) * | 1984-05-14 | 1985-08-07 | Новосибирский государственный университет им.Ленинского комсомола | Device for measuring rock pressure in well |
| 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 |
-
2013
- 2013-10-21 CN CN201310494657.3A patent/CN103538140B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1171676A1 (en) * | 1984-05-14 | 1985-08-07 | Новосибирский государственный университет им.Ленинского комсомола | Device for measuring rock pressure in well |
| 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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| 三向压力盒地应力测试及反演方法研究;许文龙;《工程科技Ⅰ辑》;20120630;第27-46页 * |
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