CN112880583A - Early warning method for deformation and damage of bottom plate in inclined shaft grouting process - Google Patents
Early warning method for deformation and damage of bottom plate in inclined shaft grouting process Download PDFInfo
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- CN112880583A CN112880583A CN202110116637.7A CN202110116637A CN112880583A CN 112880583 A CN112880583 A CN 112880583A CN 202110116637 A CN202110116637 A CN 202110116637A CN 112880583 A CN112880583 A CN 112880583A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
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Abstract
The invention discloses a method for early warning the deformation and damage of a bottom plate in the process of inclined shaft grouting, which comprises the steps of installing a laser direction indicator at a certain distance outside a grouting section of an inclined shaft; uniformly placing a plurality of early warning targets in the middle of the bottom plate, and adjusting the height of the target surface to keep a certain distance between the upper edge of the target surface and the laser line; placing an early warning target at a certain distance outside the tail end of the grouting section, and adjusting the height of a target surface to enable laser rays to irradiate the target surface; whether a laser point exists on the target surface at the tail end or not can be observed in the grouting process, whether the floor heave overrun exists in the grouting section or not can be judged, and the floor heave overrun can be judged by observing the early warning target surface arranged in the grouting section; the method has the advantages of simple equipment principle, convenient operation, good flexibility and strong pertinence, and the adopted equipment can be repeatedly used, can quickly realize early warning of deformation and damage of the bottom plate, and can determine the position of the deformation and the over-limit of the bottom drum so as to ensure the safety of the bottom plate in the inclined shaft grouting process and prevent the deformation and the damage of the bottom plate.
Description
Technical Field
The invention relates to the field of mine construction, in particular to a method for early warning deformation and damage of a bottom plate in a slant well grouting process.
Background
The shaft is divided into vertical shaft and inclined shaft, the construction process of the inclined shaft is relatively simple, and the inclined shaft is generally used for geological conditions with shallow coal seam burial depth and small loose layer thickness and is widely applied to Shanxi, Neimeng and Shaanxi in China. After the construction of the inclined shaft in the loose layer section and the bedrock weathering section is completed, the leakage phenomenon generally occurs at the joint and quality defect parts of the shaft wall concrete. The well wall grouting is the most common means for treating the well wall leakage, and grouting equipment injects slurry into the interior of the well wall or the well wall under the action of certain pressure so as to block a channel for the well wall leakage and further eliminate the well wall leakage phenomenon.
The cross section of the inclined shaft of the coal mine is generally in the shape of a straight wall and a semicircular arch, the whole top side is arc-shaped, the pressure bearing capacity is high, and the bottom plate is flat and low in pressure bearing capacity. When grouting the bottom plate, the grouting pressure must be controlled, and the deformation of the bottom plate is monitored to prevent the bottom plate from seriously bulging and cracking. In China, the bottom plate is seriously cracked due to improper control of the bottom plate grouting process, water sand under pressure under the bottom plate gushes out from the cracked part at a large flow, and multiple serious water burst and sand gushing phenomena are caused, so that inclined wells are flooded, the production of mines is stopped, and the shaft is scrapped.
Except for adopting the grouting pressure control and the grouting material with better grouting performance in the grouting process, the device for monitoring and early warning the deformation of the bottom plate is arranged in the grouting process of the bottom plate, the deformation degree of the bottom plate is judged in time, the grouting is stopped in time when the early warning value is reached, and the method is an effective method for preventing the deformation and the damage of the bottom plate and ensuring the safety of the bottom plate. The retrieval shows that the current well wall safety early warning mainly comprises the steps of embedding a sensing device in well wall concrete (such as a steel string type sensor system for monitoring the well wall by ZL201810242255.7 and a deformation early warning method; and a ZL201410100335.0 vertical well wall deformation distributed optical fiber detection method), predicting the fracture problem of the well wall by the concrete deformation value monitored by the sensing device, and the method has high technical requirements, high cost and low applicability in the grouting process.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a floor deformation damage early warning method in the inclined shaft grouting process, which has the advantages of simple principle and convenience in operation and can effectively prevent the floor deformation damage problem in the inclined shaft grouting process of a coal mine.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a method for early warning deformation and damage of a bottom plate in a slant well grouting process, which specifically comprises the following steps:
s1, mounting and fixing an explosion-proof laser direction indicator at a certain distance outside the inclined shaft grouting section, wherein the laser direction indicator is mounted in the middle of the bottom plate and ensures that a laser line of the laser direction indicator points to the direction of the inclined shaft grouting section, the laser line is parallel to the bottom plate, and the projection of the laser line in the vertical direction is positioned in the middle of the bottom plate;
s2, placing an early warning target at the middle position of the bottom plate at intervals, and adjusting the height of the target surface to keep a certain distance between the upper edge of the target surface and the laser line, wherein the distance is the maximum distance for allowing the bottom plate to deform in the grouting process;
s3, mounting an early warning target at a certain distance outside the tail end of the grouting section, and adjusting the height of the target surface to enable the laser line to irradiate the target surface;
s4, observing the end target surface in the grouting process, and keeping grouting all the time if the laser points on the target surface do not disappear; if the laser point on the target surface disappears, the fact that the bottom plate bottom drum at a certain position in the grouting section deforms to cause the early warning target at the corresponding position to lift is shown, and if the target surface blocks a laser line, grouting is stopped immediately;
and S5, checking the laser irradiation conditions on each target surface in the grouting section one by one, and judging that the laser target position is the floor heave deformation overrun position if finding the early warning target with laser irradiation on the target surface.
Preferably, the distance between the laser line emitted by the laser pointer and the bottom plate in step S1 is controlled to be 1.0-1.5 m.
Preferably, the base of the early warning target and the target surface are fixedly connected together through a connecting rod with adjustable length in the step S2.
Preferably, the distance between the early warning targets in step S2 is consistent with the width of the inclined shaft.
Preferably, the distance between the laser pointer and the front end of the grouting section in step S1 is equal to 10 times of the width of the inclined shaft, and the distance between the early warning target outside the tail end of the grouting section and the tail end of the grouting section in step S3 is equal to 10 times of the width of the inclined shaft.
Preferably, the distance between the target surface and the laser line is adjusted according to the current situation of the base plate, the deformation amount of the drum is allowed in different sections is determined according to the current situation of the base plate, and then the distances between the upper edge of the target surface and the laser line in different positions are respectively determined, so that targeted and differentiated early warning is realized.
The invention has the beneficial effects that: the method has the advantages of simple equipment principle, convenient operation, good flexibility and strong pertinence, and the adopted equipment can be repeatedly used, can quickly realize early warning of deformation and damage of the bottom plate, and can determine the position of the deformation and the over-limit of the bottom drum so as to ensure the safety of the bottom plate in the inclined shaft grouting process and prevent the deformation and the damage of the bottom plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of an installation position of a laser direction finder and an early warning target provided in an embodiment of the present invention;
FIG. 2 is a state diagram of a deformed base plate according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an early warning target provided in an embodiment of the present invention.
Description of reference numerals:
1. a base plate; 2. a laser pointer; 3. a laser line; 4. early warning targets; 5. supporting the inclined shaft; 6. and (5) target surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the whole top wall 5 of the inclined shaft of the coal mine is arc-shaped, the bearing capacity is high, the bottom plate 1 is flat, the bearing capacity is low, grouting pressure must be controlled during grouting of the bottom plate 1, deformation of the bottom plate 1 is monitored, and the phenomenon that the bottom plate 1 is seriously bulged and broken is prevented from occurring, so that the early warning method for deformation and damage of the bottom plate in the inclined shaft grouting process provided by the embodiment specifically comprises the following steps:
s1, installing and fixing an explosion-proof laser direction indicator 2 at a certain distance outside the inclined shaft grouting section, installing the laser direction indicator 2 at the middle position of the bottom plate 1 and ensuring that a laser line 3 of the laser direction indicator 2 points to the direction of the inclined shaft grouting section, wherein the laser line 3 is parallel to the bottom plate 1, and the projection of the laser line 3 in the vertical direction is positioned at the middle position of the bottom plate 1; the bottom plate 1 is flat, the middle position of the bottom plate 1 generally has the largest deformation amplitude and is most prone to fracture in the grouting process, and early warning can be performed when the bottom plate 1 is installed at the position;
the distance between a laser line 3 emitted by a laser direction indicator 2 and the bottom plate 1 is controlled to be 1.0-1.5m, the distance is favorable for people to observe light and adjust the position of a target surface 6 at the later stage, the distance between the laser direction indicator 2 and the front end of a grouting section is equal to 10 times of the width of an inclined shaft, and the distance is set to prevent the bottom plate 1 from deforming at the installation position of the laser direction indicator 2 in the grouting process;
s2, placing an early warning target 4 at the middle position of the bottom plate 1 at intervals, and adjusting the height of a target surface 6 on the early warning target 4 to ensure that the upper edge of the target surface 6 keeps a certain distance from the laser line 3, wherein the distance is the maximum distance for allowing the bottom plate 1 to deform in the grouting process; the spacing distance between the early warning targets 4 is consistent with the width of the inclined shaft; as shown in fig. 3, the base of the early warning target 4 is fixedly connected with the target surface through a connecting rod with adjustable length;
s3, mounting an early warning target at a certain distance outside the tail end of the grouting section, adjusting the height of the target surface 6 to enable the laser line 3 to irradiate the target surface, wherein the distance between the early warning target and the tail end of the grouting section is equal to 10 times of the width of the inclined shaft;
s4, as shown in figure 2, observing the end target surface 6 in the grouting process, and keeping grouting if the laser point on the target surface does not disappear; if the laser point on the target surface disappears, the fact that the bottom of the bottom plate 1 at a certain position in the grouting section bulges and deforms to cause the early warning target at the corresponding position to lift is shown, and if the target surface blocks the laser line 3, grouting is stopped immediately;
s5, checking the laser irradiation condition on each target surface 6 in the grouting section one by one, finding the early warning target with laser irradiation on the target surface, and judging that the laser target position is the floor heave deformation overrun position.
The target surface 6 of the early warning target and the laser line 3 are adjusted according to the current situation of the bottom plate 1, for example, some sections of the bottom plate 1 have the phenomena of bottom bulging, cracking and the like, the deformation of the bottom plate 1 is allowed to be extremely small in the grouting process, some areas of the bottom plate 1 can allow the bottom plate 1 to have relatively large deformation due to better conditions, namely, according to the current situation of the bottom plate 1, the deformation of the bottom bulging is allowed to be determined in different sections, the distances between the upper edge of the target surface 6 and the laser line 3 in different positions are respectively determined, and therefore pertinence and differentiation early warning are achieved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. A bottom plate deformation and damage early warning method in the inclined shaft grouting process is characterized by comprising the following steps:
s1, mounting and fixing an explosion-proof laser direction indicator at a certain distance outside the inclined shaft grouting section, wherein the laser direction indicator is mounted in the middle of the bottom plate and ensures that a laser line of the laser direction indicator points to the direction of the inclined shaft grouting section, the laser line is parallel to the bottom plate, and the projection of the laser line in the vertical direction is positioned in the middle of the bottom plate;
s2, placing an early warning target at the middle position of the bottom plate at intervals, and adjusting the height of the target surface to keep a certain distance between the upper edge of the target surface and the laser line, wherein the distance is the maximum distance for allowing the bottom plate to deform in the grouting process;
s3, mounting an early warning target at a certain distance outside the tail end of the grouting section, and adjusting the height of the target surface to enable the laser line to irradiate the target surface;
s4, observing the end target surface in the grouting process, and keeping grouting all the time if the laser points on the target surface do not disappear; if the laser point on the target surface disappears, the fact that the bottom plate bottom drum at a certain position in the grouting section deforms to cause the early warning target at the corresponding position to lift is shown, and if the target surface blocks a laser line, grouting is stopped immediately;
and S5, checking the laser irradiation conditions on each target surface in the grouting section one by one, and judging that the laser target position is the floor heave deformation overrun position if finding the early warning target with laser irradiation on the target surface.
2. The method for warning the deformation and damage of the bottom plate in the inclined shaft grouting process as claimed in claim 1, wherein the distance between the laser line emitted by the laser direction indicator and the bottom plate in the step S1 is controlled to be 1.0-1.5 m.
3. The method for early warning of deformation and damage of the bottom plate in the inclined shaft grouting process as claimed in claim 1, wherein in the step S2, the base of the early warning target and the target surface are fixedly connected together through a connecting rod with adjustable length.
4. The method for warning the deformation and damage of the bottom plate in the inclined shaft grouting process as claimed in claim 1, wherein in the step S2, the distance between the warning targets is consistent with the width of the inclined shaft.
5. The method for warning the deformation and damage of the bottom plate in the inclined shaft grouting process as claimed in claim 1, wherein the distance between the laser pointer and the front end of the grouting section in the step S1 is equal to 10 times of the width of the inclined shaft, and the distance between the warning target outside the tail end of the grouting section in the step S3 and the tail end of the grouting section is equal to 10 times of the width of the inclined shaft.
6. The method for early warning of deformation and damage of the bottom plate in the inclined shaft grouting process as claimed in claim 1, wherein the distance between the target surface and the laser line is adjusted according to the current situation of the bottom plate, the deformation amount of the bottom drum allowed in different sections is determined according to the current situation of the bottom plate, and then the distances between the upper edge of the target surface and the laser line at different positions are respectively determined, so as to realize targeted and differential early warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110116637.7A CN112880583A (en) | 2021-01-28 | 2021-01-28 | Early warning method for deformation and damage of bottom plate in inclined shaft grouting process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110116637.7A CN112880583A (en) | 2021-01-28 | 2021-01-28 | Early warning method for deformation and damage of bottom plate in inclined shaft grouting process |
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| CN112880583A true CN112880583A (en) | 2021-06-01 |
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| CN202110116637.7A Withdrawn CN112880583A (en) | 2021-01-28 | 2021-01-28 | Early warning method for deformation and damage of bottom plate in inclined shaft grouting process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821507A (en) * | 2014-03-18 | 2014-05-28 | 中国矿业大学 | Method for detecting deformation of shaft wall of vertical shaft through distributed optical fibers |
| US20160334202A1 (en) * | 2013-09-25 | 2016-11-17 | Big Survey & Design Co. Ltd. | Method, system and target for setting reference points on construction |
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| CN209495669U (en) * | 2019-01-28 | 2019-10-15 | 广西交通科学研究院有限公司 | It arches upward the laser measuring reflection target of deformation monitoring for highway subgrade slip casting road surface |
| CN211034992U (en) * | 2019-11-22 | 2020-07-17 | 郑州大学 | Tower crane stability monitoring and early warning device |
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2021
- 2021-01-28 CN CN202110116637.7A patent/CN112880583A/en not_active Withdrawn
Patent Citations (6)
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|---|---|---|---|---|
| US20160334202A1 (en) * | 2013-09-25 | 2016-11-17 | Big Survey & Design Co. Ltd. | Method, system and target for setting reference points on construction |
| CN103821507A (en) * | 2014-03-18 | 2014-05-28 | 中国矿业大学 | Method for detecting deformation of shaft wall of vertical shaft through distributed optical fibers |
| CN108489435A (en) * | 2018-03-22 | 2018-09-04 | 安徽理工大学 | The method of the steel string type sensor system and deformations early warning that be monitored to the borehole wall |
| CN209495669U (en) * | 2019-01-28 | 2019-10-15 | 广西交通科学研究院有限公司 | It arches upward the laser measuring reflection target of deformation monitoring for highway subgrade slip casting road surface |
| CN110130197A (en) * | 2019-06-19 | 2019-08-16 | 江苏智仝建设科技有限公司 | A kind of road slip casting laser monitor instrument and road slip casting allowable pressure measurement method |
| CN211034992U (en) * | 2019-11-22 | 2020-07-17 | 郑州大学 | Tower crane stability monitoring and early warning device |
Non-Patent Citations (2)
| Title |
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| LIU HUI: "Spray target laser scanning detection and three-dimensional reconstruction under simulated complex terrain", 《JOURNAL OF KOREAN SOCIETY OF LASER PROCESSING》 * |
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