CN105093349A - Method for actually measuring growth and development rule of crack in tunnel roof - Google Patents
Method for actually measuring growth and development rule of crack in tunnel roof Download PDFInfo
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- CN105093349A CN105093349A CN201410215639.1A CN201410215639A CN105093349A CN 105093349 A CN105093349 A CN 105093349A CN 201410215639 A CN201410215639 A CN 201410215639A CN 105093349 A CN105093349 A CN 105093349A
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Abstract
The invention discloses a method for actually measuring a growth and development rule of a crack in a tunnel roof. The method comprises establishing measuring stations in a well, arranging drill holes in the measuring stations, detecting and recording a growth and development condition of the crack in the roof by utilizing a drilling peep instrument, monitoring a roof surrounding rock deep displacement by utilizing a multipoint displacement meter, analyzing and comparing monitoring data of two equipment on an evolution condition of the crack in the roof, and summarizing the growth and development rule of the crack in the tunnel roof. The method has important significances in research of a tunnel roof rock stratum stratum-position condition, prediction of a roof accident and the like, and has an important significance in evaluating whether a tunnel support scheme and a parameter are reasonable.
Description
Technical field
The present invention relates to a kind of method of surveying back internal crack development law of development, be applicable to the Evolution of underground monitoring back internal crack.
Background technology
Because roadway excavation destroys rock mass internal balance, roadway surrounding rock body internal stress is redistributed.Under the impact of tunnelling disturbance, in the inner rock stratum of back, subregion can produce regeneration crack, and the impact that near rock stratum, surface, distance tunnel is subject to is comparatively large, and the impact that rock stratum far away is subject to is relatively little.Along with tunnel is constantly pushed ahead, the initial fissure in roadway surrounding rock body is grown with regeneration crack development, and may form larger shatter belt and absciss layer, severe patient even causes the major accident such as roof falling over great extent, roof water-inrush.Therefore, monitor and the development law of development studying top board internal crack for research layer position, back rock stratum situation, detect supporting effect of roadway, optimize roadway support scheme and supporting parameter, prediction roof accident etc. all significant.In recent years, the complex investigation method of subterranean body internal crack mainly contains drilling core method, ultrasonography, flow rate log method, holes and spy on method and deep soils method etc.Wherein, drilling core method carries out boring and coring to rock mass, it can reflect rock mass damage situation and rock stratum composition in country rock body to a certain extent, but owing to not carrying out Continuous Observation, its result of detection can not reflect rock stratum internal crack development Developmental stage change procedure; The boring rock mass quantitative data that ultrasonography can provide mass efficient visual, but the impact being subject to the borehole conditions such as aperture, mud viscosity is at work comparatively large, and observation operation is comparatively loaded down with trivial details, and cost is higher; Flow rate log method is mainly used for determining the geological conditions such as position, water-bearing zone, thickness, the number of plies and zonal flow rate.
In the present invention, by adopting bore detecting instrument to monitor continuously back crack evolution phenomenon, observation image pickup result can carry out qualitative analysis to the rule that crack development is grown; Adopt multipoint displacement meter to carry out monitoring record to back deep displacement, not only can develop developmental state in quantitative response crack, the distribution situation of the inner stretch-draw territory of back and compression domain can be drawn simultaneously thus.The data that these two kinds of monitoring methods record are analyzed, can the development law of development of clear reflection back internal crack, and the method is simple and convenient, directly perceived, accuracy is high.
Summary of the invention
The object of the invention is the deficiency overcome in prior art, a kind of method that method is easy, test accurate, respond well actual measurement back internal crack development law of development is provided, to disclose tunnel back internal crack Evolution in tunneling process, thus detect supporting effect of roadway and instruct the optimization of roadway support scheme and supporting parameter.
The technology of the present invention content is as follows:
A., when tunnel is tunneled forward to 50m, set up survey station I within the scope of distance heading end 5m, boring is carried out to back and spies on and deep soils.Arrange 4 borings in this survey station, wherein hole k
1, k
2and k
3vertical working tunneling direction is linearly arranged, is arranged in the middle of top board and both sides, adopts TYGD10 mining drilling detection instrument to detect back internal crack development developmental state.Boring k
4interior installation multipoint displacement meter, carries out deep soils, and each Contents for Monitoring is surveyed face and is arranged within the scope of 1m.
B., along with tunnel continues to push ahead, when being advanced into 100m and 150m, survey station II and survey station III is set up respectively.If run into tectonic structure as tomography, fold etc. in tunneling process, suitably can adjust survey station position and increase survey station number, to carry out study on monitoring to the strata pressure laws of tunnel Special zone.Survey station II and survey station III Contents for Monitoring and the face of survey arrangement all identical with survey station I.
C. sectional drawing and statistical study are carried out to the result of detection that boring spied on by 3 survey stations 9, draw the main bursting form and crack Evolution etc. of back country rock.
D. foundation primary and secondary supporting region support theory is to roadway surrounding rock deep soils data analysis.By tunnel deep wall rock compartmentalization, be divided into stretch-draw territory and compression domain.Stretch-draw territory refers to strain the region for positive, and compression domain refers to strain the region for negative, obtains back country rock deep displacement variation tendency.
E. spy on result and deep displacement variation tendency to top plate drilling to carry out comprehensively analyzing and comparing, show that back internal crack develops law of development.
The beneficial effect of the invention: boring is spied on to combine with deep displacement to grow the development of back internal crack and monitored by the present invention, and two kinds of monitoring results is analyzed, and show that law of development is developed in back crack.There is following advantage: one is push ahead with tunnel, sets up 1 ore pressure monitor survey station at 50m, 100m, 150m place respectively.Both can on top board by driving affect the stage to crack the full-fledged stage monitor continuously, again can on tunnel by driving affect violent position, driving impact position, pick after settling position monitor simultaneously.Two is make a call to 3 at 1 survey station to spy on boring and carry out bore detecting to top board, and each rock stratum, position causing crack to develop developmental state different by cross-section shape of roadway and size impact is monitored; Three is that two kinds of monitoring methods combine, qualitatively can represent the development development condition in crack, tunnel, elaboration top board deep displacement that again can be quantitative the distribution situation of the top board stretch-draw territory reflected and compression domain, back internal crack development law of development is drawn, its regularity summarization more science, effectively by comparative analysis.Four is that this programme is reasonable in design, and construction is simple, strong operability, is that the optimization that also can be roadway support scheme and supporting parameter of the effective ways that detect supporting effect of roadway provides reference.
Accompanying drawing explanation
Fig. 1 is that schematic diagram arranged by survey station of the present invention.
Fig. 2 is survey station I roof rock bore detecting result schematic diagram of the present invention.
Fig. 3 is survey station I roof rock deep displacement curve synoptic diagram of the present invention.
I-1# ore pressure monitor survey station; II-2# ore pressure monitor survey station; III-3# ore pressure monitor survey station; k
1, k
2, k
3-spy on boring; k
4-deep soils is holed.
Embodiment
Below in conjunction with accompanying drawing, enforcement of the present invention is further described:
As shown in Figure 1, when tunnel is tunneled forward to 50m time, within the scope of distance heading end 5m, set up survey station I.The boring that 4 degree of depth are 8000mm, diameter is 30mm (bit diameter 28mm) is played to top board.Wherein hole k
1, k
2and k
3vertical working tunneling direction is linearly arranged, be arranged in that top is low, top neutralization is risen position and (spied on bore position as shown in Figure 2, due to drift section type and size difference, here with trapezoidal cross-section as a reference, practical application can adjust as the case may be), adopt TYGD10 mining drilling detection instrument to detect back internal crack development developmental state.At boring k
4middle installation multipoint displacement meter, carries out deep soils to top board, and each Contents for Monitoring is surveyed face and controlled within 1m scope.When tunnel is advanced into 100m, 150m place, set up survey station II and survey station III respectively within the scope of heading end 5m, Contents for Monitoring and the face of the survey arrangement of survey station II and survey station III are all identical with survey station I.
Along with tunnel is pushed ahead, boring is carried out to back and spies on and deep soils, and record related data.To holing, the result of spying on arranges, and analyzes crack in the main bursting form of driving initial stage back country rock and tunneling process and is evolved into the development growth course of absciss layer and shatter belt gradually.Survey station I roof rock bore detecting result as shown in Figure 2.To roadway surrounding rock deep soils data analysis, according to primary and secondary supporting region support theory, by tunnel deep wall rock compartmentalization, be divided into stretch-draw territory and compression domain, stretch-draw territory refers to strain the region for positive, and compression domain refers to strain the region for negative.Horizontal ordinate represents the distance on distance back surface, and represent with L, ordinate is strain value, and survey station I roof rock deep displacement variation tendency as shown in Figure 3.Survey station II is identical with survey station I with the data processing method of survey station III.Finally several groups of data results are carried out arranging and contrasting, top board internal crack is developed and carries out the analysis of qualitative and quantitative, draw its development law of development.
Claims (2)
1. survey a method for back internal crack development law of development, it is characterized in that:
A., when tunnel is tunneled forward to 50m, set up survey station I within the scope of distance heading end 5m, boring is carried out to back and spies on and deep soils.Arrange 4 borings in this survey station, wherein hole k
1, k
2and k
3vertical working tunneling direction is linearly arranged, is arranged in the middle of top board and both sides, adopts TYGD10 mining drilling detection instrument to detect back internal crack development developmental state.Boring k
4interior installation multipoint displacement meter, carries out deep soils, and each Contents for Monitoring is surveyed face and is arranged within the scope of 1m.
B., along with tunnel continues to push ahead, when being advanced into 100m and 150m, survey station II and survey station III is set up respectively.If run into tectonic structure as tomography, fold etc. in tunneling process, suitably can adjust survey station position and increase survey station number, to carry out study on monitoring to the strata pressure laws of tunnel Special zone.Survey station II and survey station III Contents for Monitoring and the face of survey arrangement all identical with survey station I.
C. sectional drawing and statistical study are carried out to the result of detection that boring spied on by 3 survey stations 9, draw the main bursting form and crack Evolution etc. of back country rock.
D. foundation primary and secondary supporting region support theory is to roadway surrounding rock deep soils data analysis.By tunnel deep wall rock compartmentalization, be divided into stretch-draw territory and compression domain.Stretch-draw territory refers to strain the region for positive, and compression domain refers to strain the region for negative, obtains back country rock deep displacement variation tendency.
E. spy on result and deep displacement variation tendency to top plate drilling to carry out comprehensively analyzing and comparing, show that back internal crack develops law of development.
2. a kind of method of surveying back internal crack development law of development according to claim 1, is characterized in that: the survey face of described each Contents for Monitoring is arranged all within the scope of 1m; Drilling depth is 5000 ~ 10000mm, and bore diameter is 28 ~ 32mm (bit diameter is 26 ~ 28mm).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410215639.1A CN105093349A (en) | 2014-05-19 | 2014-05-19 | Method for actually measuring growth and development rule of crack in tunnel roof |
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| CN201410215639.1A CN105093349A (en) | 2014-05-19 | 2014-05-19 | Method for actually measuring growth and development rule of crack in tunnel roof |
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Cited By (7)
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| CN105759010A (en) * | 2016-02-04 | 2016-07-13 | 山东大学 | Mining influence tunnel dynamic monitoring and stability evaluation method |
| CN109555562A (en) * | 2018-11-26 | 2019-04-02 | 湘潭大学 | A kind of deep stope roof rock monitoring system and method |
| CN110390152A (en) * | 2019-07-15 | 2019-10-29 | 中国矿业大学 | A kind of Discrete-parcel method that simulation roadway surrounding rock crack develops |
| CN111271129A (en) * | 2020-01-31 | 2020-06-12 | 天地科技股份有限公司 | Method for acquiring deformation and fracture expansion rule of stoping roadway surrounding rock |
| CN114295529A (en) * | 2022-01-05 | 2022-04-08 | 国家能源集团新疆能源有限责任公司 | Method and system for determining development condition of internal fracture of rock mass after artificial disturbance |
| CN115929408A (en) * | 2023-01-17 | 2023-04-07 | 河南理工大学 | System and method for monitoring coal mine roof cracks in real time in roadway driving process |
| US12031436B1 (en) | 2023-01-17 | 2024-07-09 | Henan Polytechnic University | Real-time monitoring system and method for coal mine roof fractures during roadway tunneling process |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105759010A (en) * | 2016-02-04 | 2016-07-13 | 山东大学 | Mining influence tunnel dynamic monitoring and stability evaluation method |
| CN105759010B (en) * | 2016-02-04 | 2017-11-07 | 山东大学 | A kind of dynamic monitoring of mining influence tunnel and Stability Assessment method |
| CN109555562A (en) * | 2018-11-26 | 2019-04-02 | 湘潭大学 | A kind of deep stope roof rock monitoring system and method |
| CN110390152A (en) * | 2019-07-15 | 2019-10-29 | 中国矿业大学 | A kind of Discrete-parcel method that simulation roadway surrounding rock crack develops |
| RU2746748C1 (en) * | 2019-07-15 | 2021-04-20 | Китайский Университет Горного Дела И Технологии | Discrete element method for modeling the development of a fault in the rock surrounding the rod |
| CN111271129A (en) * | 2020-01-31 | 2020-06-12 | 天地科技股份有限公司 | Method for acquiring deformation and fracture expansion rule of stoping roadway surrounding rock |
| CN114295529A (en) * | 2022-01-05 | 2022-04-08 | 国家能源集团新疆能源有限责任公司 | Method and system for determining development condition of internal fracture of rock mass after artificial disturbance |
| CN114295529B (en) * | 2022-01-05 | 2023-07-25 | 国家能源集团新疆能源有限责任公司 | Method and system for measuring development condition of internal fracture of rock body after artificial disturbance |
| CN115929408A (en) * | 2023-01-17 | 2023-04-07 | 河南理工大学 | System and method for monitoring coal mine roof cracks in real time in roadway driving process |
| CN115929408B (en) * | 2023-01-17 | 2023-09-19 | 河南理工大学 | Real-time monitoring system and method for coal mine roof fracture in tunneling process |
| US12031436B1 (en) | 2023-01-17 | 2024-07-09 | Henan Polytechnic University | Real-time monitoring system and method for coal mine roof fractures during roadway tunneling process |
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Application publication date: 20151125 |
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