CN103616001B - Roadway surrounding rock body multiple spot the roof separation value monitor and measurement apparatus and installation and measuring method - Google Patents
Roadway surrounding rock body multiple spot the roof separation value monitor and measurement apparatus and installation and measuring method Download PDFInfo
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- CN103616001B CN103616001B CN201310614482.5A CN201310614482A CN103616001B CN 103616001 B CN103616001 B CN 103616001B CN 201310614482 A CN201310614482 A CN 201310614482A CN 103616001 B CN103616001 B CN 103616001B
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Abstract
The invention discloses roadway surrounding rock body multiple spot the roof separation value monitor and measurement apparatus and installation and measuring method, this dress is patrolled by separation indicator, locker, measurement bracket, displacement meter and vertical composition, country rock body is drilled with a boring and another boring, in one boring, multiple spot separation indicator is installed, it is mounted with locker in another boring, locker is built-in with the front end sleeve pipe of measurement bracket, by locking filament compact siro spinning technology between front end sleeve pipe and locker, measurement bracket is fixed with displacement meter, displacement meter one end tangles separation indicator hook by preposition suspension member, the displacement meter other end is walked around pulley by stay cord and is tangled vertical, finally directly read reading by the reader on displacement meter, just the absciss layer amount variable quantity between adjacent two separation indicators can be obtained. the present invention is that tunnel and mine tunnel engineering design of its support and safety in production provide high-precision observation data, is mainly used in causing inside the country rock top board of tunnel and mine development tunnel or stope drift active workings, base plate and side portion's rock mass the monitoring of absciss layer amount.
Description
Technical field
The present invention relates to a kind of roof and floor and portion of side multiple spot absciss layer high precision measuring device, belong to portion's absciss layer measuring device technical field in tunnel and mine country rock body, be specifically related to roadway surrounding rock body multiple spot the roof separation value monitor and measurement apparatus and installation and measuring method.
Background technology
At present, for the monitoring of portion's absciss layer amount in tunnel and mine country rock body, being most commonly used that two quasi-instruments, one is electronic type monitoring instrument, and another kind is mechanical type monitoring instrument. The former electronic type monitoring instrument is that the displacement signal that absciss layer change causes is converted into electronic signal, realize the monitoring to country rock inside absciss layer amount, but there is the erosion of its structure complexity, processing cost and later maintenance cost height, repair rate height, moisture-sensitive and water and cause the defects such as equipment malfunction, not easily spread uses; The latter's mechanical type monitoring instrument, although structure is relatively simple, but there is certainty of measurement often relatively low, the defect such as range is limited, easy-to-rust is malfunctioning. Sum up jointly being disadvantageous in that of two kinds of instruments: delamination monitoring point negligible amounts, be generally 2～4, it is impossible to the separating location that in reflection country rock body, portion is concrete completely, particularly often at one's wit's end when the quantity measuring point more than more than 6; Delamination monitoring mainly uses at top board, helps the monitoring of portion and base plate absciss layer not easily to install operation for two; Measurement stroke is limited, for the section that country rock body deformability amount is bigger, often loses efficacy because it exceedes self measurement stroke; Installation process needs specialized engineering technical staff correctly to install, and otherwise by being likely to affect the normal use of instrument, for the numerous workmens without special training, not easily correctly installs operation; Sensitivity is low, often it is only capable of being accurate to 0.1～1mm, it is subject to spring straining effect especially for lining rope side, it is chronically exposed in malaria, spring failure or corrosion is often caused to make monitoring instrument malfunctioning, cause cannot reading data authentic and validly, cause great potential safety hazard to tunnel and mine tunnel engineering.
Summary of the invention
It is an object of the invention to provide a kind of simple in construction, multiple spot delamination monitoring, stroke is not limit, easy to install and use, cheap, absciss layer measurement precision is high roadway surrounding rock body multiple spot the roof separation value monitor and measurement apparatus.
It is a further object of the present invention to provide installation and measuring method.
In order to overcome the deficiencies in the prior art, the technical scheme is that so solution: the monitoring of a kind of roadway surrounding rock body multiple spot absciss layer amount and measurement apparatus, this device is by multiple spot separation indicator, locker, measurement bracket, displacement meter and vertical composition, the present invention is characterized in that in country rock body to be drilled with a boring and another boring, in one boring, multiple spot separation indicator is installed, described multiple spot separation indicator is by a clamp, two clamps, N clamp, one steel wire rope, two steel wire ropes, N steel wire rope and separation indicator hook, two separation indicator hooks, N separation indicator hook composition, a wherein said clamp, two clamps, N clamp both sides are entrapped on the inwall of a boring by elastic wire, a described clamp, two clamps, N clamp one end are connected with a steel wire rope, two steel wire ropes, N steel wire rope one end successively respectively, and a described steel wire rope, two steel wire ropes, the N steel wire rope other end are linked up with a separation indicator successively respectively, two separation indicator hooks, N separation indicator are linked up with one end and be connected, it is mounted with locker in another boring described, described locker is built-in with measurement bracket front end sleeve pipe, described front end sleeve pipe is by locking filament and external screw thread cone compact siro spinning technology, described external screw thread cone respectively with retaining ring, conical ring, pad, locking nut, alignment pin connects, described front end sleeve pipe is fixing with measurement bracket to be connected, described measurement bracket is fixed with displacement meter, described displacement meter is made up of dip stick and reader, described measurement bracket is connected with supporting plate by bolt with Moveable support, described supporting plate is connected with reader, described reader is connected with dip stick, described dip stick one end tangles N separation indicator hook by N steel wire rope and preposition suspension member, the described displacement meter other end is walked around pulley by stay cord and is tangled vertical, finally directly read reading by the reader on displacement meter, described measurement bracket has multiple circular hole, Moveable support is provided with jump ring pellet, Moveable support is inserted in measurement bracket, snapped in the circular hole of diverse location by jump ring pellet, measure end and be fixed with pulley.
Described locker is made up of external screw thread cone, retaining ring, conical ring, pad and locking nut, described external screw thread cone is cased with retaining ring, conical ring it is cased with outside retaining ring, pad it is cased with outside conical ring, locking nut it is cased with outside pad, making external screw thread cone and conical ring mutually shift near by rotational lock nut, cause retaining ring, after receiving crimp, expanded radially occurs, retaining ring is just firmly locked in boring.
Described retaining ring outer rim is set to zigzag or bright finish, and its material is the metal material with fluting or elastomeric material or cement based anchoring material or organic anchoring material.
Described front end sleeve pipe is connected for welding or bolt anchoring with measurement bracket.
Described displacement be calculated as electronic digital indicator or mechanical type slide gauge or electronic type displacement meter any one.
Described external screw thread cone should closely cooperate with front end sleeve pipe.
Described multiple spot separation indicator is two or more separation indicator.
Being inlaid with alignment pin on the sleeve pipe of described front end, alignment pin should snap in the draw-in groove with external screw thread cone distal end.
The installation of a kind of roadway surrounding rock body multiple spot the roof separation value monitor and measurement apparatus and measuring method, carry out in the steps below:
1), choose the section of the required internal absciss layer of monitoring rock mass, country rock body adopts the drill bit that mates with another bore diameter of jumbolter be perpendicular to country rock body wall to creep in rock mass and be longer than locker 5～10 centimeters, then drill bit is changed into the drill bit matched with a bore diameter, continue to creep into after need to observing absciss layer designated depth to rock mass deep along another drill center, stop continuing to creep into depths, and adopt the pressure wind before drill bit or water that bore inner is carried out the process of clear hole, until discharging without rock slag or cinder again in boring, just can be taken off drilling rod and drill bit,
2), according to the absciss layer designing requirement at monitoring different depth place, choose the quantity of separation indicator, and adopt anchor cable or screw mandrel that multiple spot separation indicator is mounted to boring designated depth, installation process should be installed from inside to outside successively, and it is exposed to outside hole wall by outstanding for the N steel wire rope linking up with one end with, installing locker for the ease of the later stage, its N steel wire rope exposed junction length should be long no less than 40 centimeters;
3), install locker in another boring in before, need to first assemble locker, by retaining ring, conical ring, pad be inserted in external screw thread cone successively, finally the external screw thread of screw thread cone outside rotates and locking nut, but retaining ring need to be kept to be in relaxed state;
4), steel wire rope and hook through locker, and locker is sent in another boring, retaining ring is made just to snap in borehole wall, and then rotational lock nut, external screw thread cone and conical ring being drawn close under external force mutually, forcing generation longitudinal dilatation deformation to be firmly locked in another boring thus extruding retaining ring;
5), the front end sleeve pipe of measurement bracket is inserted in external screw thread cone, and makes the alignment pin in external screw thread cone snap in external screw thread cone draw-in groove, then adopt locking filament to penetrate external screw thread cone and front end sleeve pipe, make measurement bracket be fixed in locker;
6), displacement meter is fixed on the supporting plate of measurement bracket in advance, then pinning jump ring pellet makes Moveable support intert in the round-meshed hollow pipe of measurement bracket, and pin actual measurement range adjustment measurement bracket total length, and dip stick one end is tangled the stay cord with vertical, the other end tangles the hook of the separation indicator of required observation by preposition suspension member, when measuring absciss layer initial reading, dip stick should be pulled to maximum range, it is simple to the later stage is observed;
7), by the dial plate above reading reader or display, just can directly obtain multiple spot separation indicator place different depth place initial value and later stage changing value, and data are recorded in time and processes, judge the absciss layer amount at different depth place in a boring with this.
The present invention is compared with existing electronic type monitoring instrument and mechanical type monitoring instrument, have tool simple in construction, applicable multiple spot delamination monitoring, stroke is not limit, easy to install and use, absciss layer measurement precision is high, cheap, top board can not only be carried out absciss layer observation, also its portion of side even base plate can be carried out the advantages such as high accuracy, absciss layer observation accurately, can be widely used for the internal absciss layer change of the country rock of tunnel, mine development tunnel and stope drift active workings.
Accompanying drawing explanation
Fig. 1 is each parts longitudinal profile structural representation that the present invention assembles;
Fig. 2 is the locker cross-sectional view of Fig. 1;
Fig. 3 is the A-A sectional structure schematic diagram of the retaining ring of Fig. 1;
Fig. 4 is the external screw thread cone sectional structure schematic diagram of Fig. 1;
Fig. 5 is the B-B sectional structure schematic diagram of Fig. 4;
Fig. 6 is the C-C sectional structure schematic diagram of Fig. 4;
Fig. 7 is front end sleeve pipe and measurement bracket and the Moveable support sectional structure schematic diagram of Fig. 1;
Fig. 8 is the D-D sectional structure schematic diagram of Fig. 7.
In figure, parts title illustrates: external screw thread cone 1, retaining ring 2, conical ring 3, pad 4, locking nut 5, alignment pin 7, front end sleeve pipe 8, measurement bracket 9, circular hole 10, bolt 11, Moveable support 12, jump ring pellet 13, dip stick 14, reader 15, pulley 16, supporting plate 17, separation indicator hook 18, vertical 19, boring 20, clamp 21, steel wire rope 22, stay cord 23, preposition suspension member 24, another boring 25.
Detailed description of the invention
Below in conjunction with accompanying drawing, present disclosure is further illustrated:
Shown in Fig. 8, the monitoring of a kind of roadway surrounding rock body multiple spot absciss layer amount and measurement apparatus, this device is by multiple spot separation indicator, locker, measurement bracket, displacement meter and vertical composition, country rock body 26 is drilled with a boring 20 and another boring 25, in one boring 20, multiple spot separation indicator is installed, described multiple spot separation indicator is by a clamp 21-1, two clamp 21-2, N clamp 21-N, one steel wire rope 22-1, two steel wire rope 22-2, N steel wire rope 22-N and separation indicator hook 18-1, two separation indicator hook 18-2, N separation indicator hook 18-N composition, a wherein said clamp 21-1, two clamp 21-2, N clamp 21-N both sides are entrapped on the inwall of a boring 20 by elastic wire, a described clamp 21-1, two clamp 21-2, N clamp 21-N one end are connected with a steel wire rope 22-1, two steel wire rope 22-2, N steel wire rope 22-N one end successively respectively, and a described steel wire rope 22-1, two steel wire rope 22-2, N steel wire rope 22-N other ends link up with 18-1 successively respectively with a separation indicator, two separation indicators hook 18-2, N separation indicators hook 18-N one end are connected, it is mounted with locker in another boring 25 described, described locker is built-in with measurement bracket front end sleeve pipe 8, described front end sleeve pipe 8 is by locking filament 6 and external screw thread cone 1 compact siro spinning technology, described external screw thread cone 1 respectively with retaining ring 2, conical ring 3, pad 4, locking nut 5, alignment pin 7 connects, described front end sleeve pipe 8 is fixing with measurement bracket 9 to be connected, described measurement bracket 9 is fixed with displacement meter, described displacement meter is made up of dip stick 14 and reader 15, described measurement bracket 9 is connected with supporting plate 17 by bolt 11 with Moveable support 12, described supporting plate 17 is connected with reader 15, described reader 15 is connected with dip stick 14, described dip stick 14 one end tangles a separation indicator hook 18-N by steel wire rope 22-N and preposition suspension member 24, the described displacement meter other end is walked around pulley 16 by stay cord 23 and is tangled vertical 19, finally directly read reading by the reader 15 on displacement meter, described measurement bracket 9 has multiple circular hole 10, Moveable support 12 is provided with jump ring pellet 13, Moveable support 12 is inserted in measurement bracket 9, snapped in the circular hole 10 of diverse location by jump ring pellet 13, measure end and be fixed with pulley 16.
Described locker is made up of external screw thread cone 1, retaining ring 2, conical ring 3, pad 4 and locking nut 5, described external screw thread cone 1 is cased with retaining ring 2, conical ring 3 it is cased with outside retaining ring 2, pad 4 it is cased with outside conical ring 3, locking nut 5 it is cased with outside pad 4, making external screw thread cone 1 and conical ring 3 mutually shift near by rotational lock nut 5, cause retaining ring 2, after receiving crimp, expanded radially occurs, retaining ring 2 is just firmly locked in boring 25.
Described retaining ring 2 outer rim is set to zigzag or bright finish, and its material is the metal material with fluting or elastomeric material or cement based anchoring material or organic anchoring material.
Described front end sleeve pipe 8 is connected for welding or bolt anchoring with measurement bracket 9.
Described displacement be calculated as electronic digital indicator or mechanical type slide gauge or electronic type displacement meter any one.
Described external screw thread cone 1 should closely cooperate with front end sleeve pipe 8.
Described multiple spot separation indicator is two or more separation indicator.
Being inlaid with alignment pin 7 on described front end sleeve pipe 8, alignment pin 7 should snap in the draw-in groove with external screw thread cone 1 end.
A kind of monitoring of roadway surrounding rock body multiple spot absciss layer amount and the installation of measurement apparatus and measuring method, carry out in the steps below:
1), choose the section of the required internal absciss layer of monitoring rock mass, the drill bit adopting jumbolter and boring 25 diameter matches in country rock body 26 is perpendicular to country rock body 26 wall and creeps in rock mass and be longer than locker 5～10 centimeters, then drill bit is changed into the drill bit matched with boring 20 diameters, continue to creep into after need to observing absciss layer designated depth to rock mass deep along another 25 centers of holing, stop continuing to creep into depths, and adopt the pressure wind before drill bit or water that bore inner is carried out the process of clear hole, until discharging without rock slag or cinder again in boring, just can be taken off drilling rod and drill bit,
2), according to the absciss layer designing requirement at monitoring different depth place, choose the quantity of separation indicator, and adopt anchor cable or screw mandrel that multiple spot separation indicator is mounted to boring designated depth, installation process should be installed from inside to outside successively, and will be exposed to outside hole wall with the N steel wire rope 22-N linking up with 18-N one end is outstanding, installing locker for the ease of the later stage, its steel wire rope 22-N exposed junction length should be long no less than 40 centimeters;
3), install locker in another boring 25 in before, need to first assemble locker, by retaining ring 2, conical ring 3, pad 4 be inserted in external screw thread cone 1 successively, finally the external screw thread of screw thread cone 1 outside rotates and locking nut 5, but retaining ring 2 need to be kept to be in relaxed state;
4), steel wire rope 22-N and hook 18-N traverse locker, and locker is sent in another boring 25, retaining ring 2 is made just to snap in borehole wall, and then rotational lock nut 5, external screw thread cone 1 and conical ring 3 being drawn close under external force mutually, forcing generation longitudinal dilatation deformation to be firmly locked in another boring 25 thus extruding retaining ring 2;
5), the front end sleeve pipe 8 of measurement bracket is inserted in external screw thread cone 1, and make the alignment pin 7 in external screw thread cone 1 snap in external screw thread cone 1 draw-in groove, then adopt locking filament 6 to penetrate external screw thread cone 1 and front end sleeve pipe 8, make measurement bracket be fixed in locker;
6), displacement meter is fixed in advance on the supporting plate 17 of measurement bracket, then pinning jump ring pellet 13 makes Moveable support 12 intert in the measurement bracket 9 hollow pipe with circular hole 10, and pin actual measurement range adjustment measurement bracket total length, and dip stick 14 one end is tangled the stay cord 23 with vertical 19, the other end tangles the hook 18-N of the N separation indicator of required observation by preposition suspension member 24, when measuring absciss layer initial reading, dip stick 14 should be pulled to maximum range, it is simple to the later stage is observed;
7), by the dial plate above reading reader 15 or display, just can directly obtain multiple spot separation indicator place different depth place initial value and later stage changing value, and data are recorded in time and processes, judge the absciss layer amount at different depth place in a boring 20 with this.
Embodiment 1
The present embodiment is to implement in certain stope of coal mines tunnel, in order to its stope drift active workings base plate Mining failure is caused the impact of absciss layer inside rock mass by the back production of monitoring face, the on-the-spot MK-3 underground drill rig adopting Mei Ke institute rig to produce vertically reaches 16m to drilling depth under base plate, peephole diameter is 50mm. Method and steps described in technology implementation scheme carries out the installation of each assembly of instrument, and 21 base plate separation indicators are arranged in the different depth place of base plate peephole in base plate peephole. It is below during this working face extraction, the observed case of return aircourse base plate observation is as follows: can be seen that from the relative absciss layer amount (16～8m measuring point) of the adjacent each measuring point of tailentry road base plate separation indicator, absciss layer higher value should occur between 11～12m, between each measuring point, maximum absciss layer amount can reach 42.58mm, and between survey of being separated by is secondary, the maximum relative absciss layer amount of each measuring point reaches 6.24mm; Can be seen that from the relative absciss layer amount (8～aperture measuring point) of the adjacent each measuring point of tailentry road base plate separation indicator, except causing, due to loose range influence area, tunnel, the larger data that base plate pucking causes between 1m to base plate, 8m measuring point～aperture measuring point absciss layer higher value occurs between 3～2.5m, and this section of absciss layer amount can be reached for 12.37mm. These observation data absolutely prove, in peephole, the change of base plate absciss layer amount is comparatively obvious, at about hole depth 8m place, the crack that constantly advances along with stope germinates gradually, and grow crack to 0～8m and 8～12m two ends extension, corresponding bottom plate depth 3.0～2.5m and 11.0～11.5m, cranny development degree is relevant with this place's lithology, before observation hole depth, the crack of 3～2.5m position is tunnel relaxation zone coverage, in below hole depth 12m original crack aplasia, do not produce obvious crack because of mining influence. Fully shown by this observation, continuous back production along with work surface, its maximum separating location in base plate deep should occur between 11.0～11.5m, this result is that mine bottom plate Mining failure degree of depth value provides infallible data, and mine is prevented and treated base plate water damage from now on and reference and reference function are played in improvement.
Claims (7)
1. the monitoring of a roadway surrounding rock body multiple spot absciss layer amount and measurement apparatus, this device is by multiple spot separation indicator, locker, measurement bracket, displacement meter and vertical composition, country rock body (26) is drilled with a boring (20), in one boring (20), multiple spot separation indicator is installed, described multiple spot separation indicator is by a clamp (21-1), two clamps (21-2), N clamp (21-N), one steel wire rope (22-1), two steel wire ropes (22-2), N steel wire rope (22-N) and separation indicator hook (18-1), two separation indicators hook (18-2), N separation indicator hook (18-N) composition, a wherein said clamp (21-1), two clamps (21-2), N clamp (21-N) both sides are entrapped on the inwall of a boring (20) by elastic wire, a described clamp (21-1), two clamps (21-2), N clamp (21-N) one end are connected with a steel wire rope (22-1), two steel wire ropes (22-2), N steel wire rope (22-N) one end successively respectively, and a described steel wire rope (22-1), two steel wire ropes (22-2), N steel wire rope (22-N) other end link up with (18-1), two separation indicators hook (18-2) successively respectively with a separation indicator, N separation indicator hook (18-N) one end is connected, it is characterized in that, country rock body (26) is drilled with another boring (25), it is mounted with locker in another boring (25) described, described locker is built-in with measurement bracket front end sleeve pipe (8), described front end sleeve pipe (8) is by locking filament (6) and external screw thread cone (1) compact siro spinning technology, and external screw thread cone (1) closely cooperates with front end sleeve pipe (8), described external screw thread cone (1) respectively with retaining ring (2), conical ring (3), pad (4), locking nut (5), alignment pin (7) connects, described front end sleeve pipe (8) is fixing with measurement bracket (9) welding or bolt anchoring to be connected, described measurement bracket is fixed with displacement meter on (9), described displacement meter is made up of dip stick (14) and reader (15), described measurement bracket (9) is connected with supporting plate (17) by bolt (11) with Moveable support (12), described supporting plate (17) is connected with reader (15), described reader (15) is connected with dip stick (14), described dip stick (14) one end tangles N separation indicator hook (18-N) by N steel wire rope (22-N) and preposition suspension member (24), the described displacement meter other end is walked around pulley (16) by stay cord (23) and is tangled vertical (19), finally directly read reading by the reader (15) on displacement meter, described measurement bracket (9) has multiple circular hole (10), Moveable support (12) is provided with jump ring pellet (13), Moveable support (12) is inserted in measurement bracket (9), snapped in the circular hole (10) of diverse location by jump ring pellet (13), measurement bracket end is fixed with pulley (16).
2. the monitoring of roadway surrounding rock body multiple spot absciss layer amount according to claim 1 and measurement apparatus, it is characterized in that described locker is by external screw thread cone (1), retaining ring (2), conical ring (3), pad (4) and locking nut (5) composition, described external screw thread cone (1) is cased with retaining ring (2), conical ring (3) it is cased with outside retaining ring (2), pad (4) it is cased with outside conical ring (3), locking nut (5) it is cased with outside pad (4), external screw thread cone (1) and conical ring (3) is made mutually to shift near by rotational lock nut (5), cause retaining ring (2), after receiving crimp, expanded radially occurs, retaining ring (2) is just firmly locked in another boring (25).
3. the monitoring of roadway surrounding rock body multiple spot absciss layer amount according to claim 1 or claim 2 and measurement apparatus, it is characterized in that described retaining ring (2) outer rim is set to zigzag or bright finish, its material is the metal material with fluting or elastomeric material or cement based anchoring material or organic anchoring material.
4. the monitoring of roadway surrounding rock body multiple spot absciss layer amount and measurement apparatus according to claim 1, it is characterised in that described displacement be calculated as electronic digital indicator or mechanical type slide gauge or electronic type displacement meter any one.
5. the monitoring of roadway surrounding rock body multiple spot absciss layer amount and measurement apparatus according to claim 1, it is characterised in that described multiple spot separation indicator is two or more separation indicator.
6. the monitoring of roadway surrounding rock body multiple spot absciss layer amount according to claim 1 and measurement apparatus, it is characterised in that being inlaid with alignment pin (7) on described front end sleeve pipe (8), alignment pin (7) should snap in the draw-in groove with external screw thread cone (1) end.
7. the installation of measurement apparatus described in claim 1 and a measuring method, carries out in the steps below:
1), choose the section of the required internal absciss layer of monitoring rock mass, the drill bit adopting jumbolter and another boring (25) diameter matches in the country rock body (26) is perpendicular to country rock body (26) wall and creeps in rock mass and be longer than locker 5～10 centimeters, then drill bit is changed into the drill bit matched with boring (20) diameter, continue to creep into after need to observing absciss layer designated depth to rock mass deep along another boring (25) center, stop continuing to creep into depths, and adopt the pressure wind before drill bit or water that bore inner is carried out the process of clear hole, until discharging without rock slag or cinder again in boring, just can be taken off drilling rod and drill bit,
2), according to the absciss layer designing requirement at monitoring different depth place, choose the quantity of separation indicator, and adopt anchor cable or screw mandrel that multiple spot separation indicator is mounted to boring designated depth, installation process should be installed from inside to outside successively, and it is exposed to outside hole wall by outstanding for the N steel wire rope (22-N) linking up with (18-N) one end with N separation indicator, installing locker for the ease of the later stage, its N steel wire rope (22-N) exposed junction length should be long no less than 40 centimeters;
3), install locker in another boring (25) in before, need to first assemble locker, by retaining ring (2), conical ring (3), pad (4) be inserted in external screw thread cone (1) successively, the external screw thread of last screw thread cone (1) outside rotates and locking nut (5), but retaining ring (2) need to be kept to be in relaxed state;
4), steel wire rope (22) and hook (18) traverse locker, and locker is sent in another boring (25), retaining ring (2) is made just to snap in borehole wall, and then rotational lock nut (5), external screw thread cone (1) and conical ring (3) being drawn close under external force mutually, forcing generation longitudinal dilatation deformation to be firmly locked in another boring (25) thus extruding retaining ring (2);
5), the front end sleeve pipe (8) of measurement bracket is inserted in external screw thread cone (1), and make the alignment pin (7) in external screw thread cone (1) snap in external screw thread cone (1) draw-in groove, then adopt locking filament (6) to penetrate external screw thread cone (1) and front end sleeve pipe (8), make measurement bracket be fixed in locker;
6), displacement meter is fixed in advance on the supporting plate (17) of measurement bracket, then pinning jump ring pellet (13) makes Moveable support (12) intert in the measurement bracket (9) hollow pipe with circular hole (10), and adjust measurement bracket total length by actual measurement range, and dip stick (14) one end is tangled the stay cord (23) with vertical (19), the other end tangles N separation indicator hook (18-N) of required observation by preposition suspension member (24), when measuring absciss layer initial reading, dip stick (14) should be pulled to maximum range, it is simple to the later stage is observed;
7), by reading reader (15) above dial plate or display, just multiple spot separation indicator place different depth place initial value and later stage changing value can be directly obtained, and data are recorded in time and processes, judge the absciss layer amount at different depth place in a boring (20) with this.
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| CN107421481B (en) * | 2017-07-04 | 2023-05-02 | 成都理工大学 | Three-dimensional monitoring and early warning multipoint displacement meter for measuring rock mass expansion deformation |
| CN107478370B (en) * | 2017-08-23 | 2020-04-14 | 铜陵市力凡自动化设备有限责任公司 | Device and method for monitoring displacement and strain stress of whole roadway |
| CN109578078B (en) * | 2018-12-26 | 2023-09-05 | 河南理工大学 | Multi-base point separation layer instrument suitable for automatic warning of loose and broken coal and rock mass and use method thereof |
| CN114136255B (en) * | 2021-11-30 | 2024-02-02 | 重庆大学 | Measuring point self-locking structure and multi-point displacement meter with same |
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| CN101566452A (en) * | 2009-05-22 | 2009-10-28 | 中国矿业大学 | Rotary disc deep base point displacement meter and measuring method thereof |
| CN101832745A (en) * | 2010-03-26 | 2010-09-15 | 山东科技大学 | Multi-position base plate delaminating monitor and using method thereof |
| CN203274711U (en) * | 2013-04-16 | 2013-11-06 | 史英男 | Dual-purpose multipoint displacement meter for measuring actual displacement of surrounding rock depth surface |
| CN203657778U (en) * | 2013-11-28 | 2014-06-18 | 西安科技大学 | Multipoint separation layer value monitoring and measuring device of roadway surrounding rock body |
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| CN103616001A (en) | 2014-03-05 |
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