CN105277673A - Achieving method for simulating situation that straining-type rock bursting of roadway is caused by excavating unloading effect - Google Patents
Achieving method for simulating situation that straining-type rock bursting of roadway is caused by excavating unloading effect Download PDFInfo
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- CN105277673A CN105277673A CN201510764875.3A CN201510764875A CN105277673A CN 105277673 A CN105277673 A CN 105277673A CN 201510764875 A CN201510764875 A CN 201510764875A CN 105277673 A CN105277673 A CN 105277673A
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Abstract
The invention discloses an achieving method for simulating the situation that straining-type rock bursting of a roadway is caused by the excavating unloading effect, and belongs to the field of geology simulating tests. The achieving method includes the following step that a hole is filled with a concrete column, wherein the cement-sand ratio is controlled, flocculating agents are added, the errors between the mechanical parameters and the roadway-surrounding-rock parameters of the concrete column are controlled to be lower than 10% by testing the mechanical parameters including the compressive strength, the extension strength, the poisson ratio and the elasticity modulus of the concrete column, and then the hole is filled with concrete after the concrete is evenly stirred. The achieving method has the advantages that by means of the achieving method for simulating the situation that straining-type rock bursting of the roadway is caused by the excavating unloading effect, the background of the combined effects of different self-weight stress fields and tectonic stress fields in a site can be fully considered, and the straining-type rock bursting process is generated in the roadway digging process in rock mass. In addition, other monitoring means are combined, the various physical-performance-change parameters in the rock bursting breeding process, the rock bursting occurring process and the rupturing process after rock bursting are collected, and reliability is high.
Description
Technical field
The invention belongs to geologic modelling experiment field, be specifically related to a kind of excavation simulation Unloading Effect and cause tunnel that the implementation method of strain type rock burst occurs.
Background technology
The basic reason of subterranean body generation strain type rock burst is because strain energy runs up to a certain degree, load now suffered by rock mass has exceeded its uniaxial compressive strength, under an extraneous perturbation action, occur the violent a kind of breakoff phenomenon destroyed, namely excavate and unload effect causes tunnel that strain type rock burst occurs is like this.Due to severity, instantaneity that strain type rock burst occurs, to the destructiveness of the security of the lives and property, the research for this problem is very important.Inventing a kind of analogy method that can realize the rock burst of roadway excavation Unloading Effect generation strain type preferably, providing research method relatively easily for analyzing problems undoubtedly.
Due to severity, instantaneity that strain type rock burst occurs, realize the rock burst of excavate and unload tunnel generation strain type in indoor very difficult.Entangle its reason, mainly contain three aspects:
One, the digging process in tunnel is difficult in indoor realize.Scene is excavated protolith, and this process cannot realize in indoor at all.How selecting a kind of just right mode to realize this process, is that one of key issue of strain type rock burst occurs in tunnel under indoor realize excavate and unload effect.
Its two, select which kind of force way, the force environment in on-the-spot tunnel can be reduced as much as possible, this is the key issue two that strain type rock burst occurs in tunnel under indoor realize excavate and unload effect.
Its three, realize the excavate and unload in tunnel in indoor after, how to define the generating process of strain type rock burst, this is the key issue three that strain type rock burst occurs in tunnel under indoor realize excavate and unload effect.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, providing a kind of excavation simulation Unloading Effect causes tunnel that the implementation method of strain type rock burst occurs, the genesis mechanism that excavation Unloading Effect tunnel is occurred to for strain type rock burst launches research, not only be conducive to the rule disclosing off-load rock burst, and the effect of laboratory experiment guide field engineering rock mass can be played further, improve the reduction degree that laboratory experiment means reflect field engineering problem as much as possible.
For overcoming the above problems, the technical solution used in the present invention is as follows, and a kind of excavation simulation Unloading Effect causes tunnel that the implementation method of strain type rock burst occurs, and comprises the following steps:
S1 test material preparation: choose the rock in roadway construction, is prefabricated into the rock sample of rule body shape, gets out round tube hole simulation tunnel in the centre of the pros and cons of inspection surface;
Filling coagulation post in S2 hole: control cement-sand ratio, add flocculating agent, by the mechanics parameter of the compressive strength of test coagulation post, tensile strength, Poisson ratio, elastic modulus, make the mechanical property of coagulation post and roadway surrounding rock parameter error control below 10%, then by concrete-agitating evenly after insert in through hole;
S3 control mode is selected: select twin shaft control mode, wherein axial load simulation gravity stress, horizontal load simulation tectonic stress;
S4 boundary condition is arranged: by level be axially set to stress boundary condition, and by level of control and the different terrestrial stress of axial load size simulated field, the power such as selections load level and are axially loaded on definite value;
The off-load of S5 roadway excavation operates: the first, is directed to the tunnel meeting the requirement of simultaneous drifting road, is disposablely disclosed by middle coagulation post, the disposable one-tenth lane of simulated field; The second, for needs repeatedly cycle operation formation tunnel, the gradation of simulated field becomes lane, is disclosed by coagulation post stage by stage.
As preferably, further comprising the steps of:
The rock burst of S6 strain type judges: after roadway excavation completes, tunnel Bian Bi experienced by quiet period, particle bounce, scale off phenomenon, can think and there occurs strain type rock.
As preferably, the rock sample of the rule body shape described in S1 is square or rectangular parallelepiped.
As preferably, the numerical value of the diameter in the round tube hole simulation tunnel described in S1 can not exceed the most minor face of rock sample long 1/3 to 1/5.
Beneficial effect of the present invention is as follows: the invention provides a kind of excavation simulation Unloading Effect and cause tunnel that the implementation method of strain type rock burst occurs, under can taking into full account self-weight stress fields different in scene and tectonic stress field synergy background, in rock mass, carry out the process that strain type rock burst occurs in tunnelling process.And combine other monitoring meanss, gather the breeding of rock burst, occur and all kinds of physical property running parameters of rupture process after rock burst, reliability is strong.
Accompanying drawing explanation
Fig. 1 is the front schematic view of test material preparation figure;
Fig. 2 is the side schematic view of test material preparation figure;
Front schematic view centered by Fig. 3 after Via Fill;
Right side schematic diagram centered by Fig. 4 after Via Fill;
Left side schematic diagram centered by Fig. 5 after Via Fill;
Schematic diagram below centered by Fig. 6 after Via Fill.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the present invention is described in further details.
The present invention is achieved by the following technical solutions:
1) test material preparation: first choose rock common in roadway construction, prefabricated square or rectangular parallelepiped rock sample, the round tube hole simulation tunnel of certain radius is bored in the centre of the pros and cons of inspection surface, wherein, the numerical value of diameter can not exceed the most minor face of test specimen long 1/3 ~ 1/5, as depicted in figs. 1 and 2.
2) filling coagulation post in hole: by controlling cement-sand ratio, add flocculating agent, after maintenance completes, test its mechanics parameter similar with enclosing lithologies mechanics parameter (main contrast and the larger peak strength of energy accumulation relation and elastic modulus), coagulation post is inserted in through hole, as shown in Figure 3 and Figure 6.
3) control mode is selected: be self-weight stress field and the tectonic stress field synergy effect of simulated field engineering rock mass, and usually negligible along the distortion of tunnel trend, therefore, selects twin shaft control mode.Wherein axial load simulation gravity stress, horizontal load simulation tectonic stress.
4) boundary condition is arranged: tunnel surrounding rock body should be infinitely-great rock mass relative to heading sizes, therefore level is set to stress boundary condition with axial.The different terrestrial stress of simulated field is carried out by level of control and axial load size, for proof stress boundary condition is constant, the power load modes such as selection are by level and be axially loaded on definite value, and definite value is determined for the level in certain stage casing, mine at scene and vertical stress situation.
5) roadway excavation off-load operation: be the digging process that simulated field is different, digging process arranged two kinds of modes: the first, disposable middle coagulation post to be disclosed; The second, according to circumstances, stage by stage coagulation post is disclosed.In this stage, for observation bucket goes out the deformation of rear surrounding rock body, axial and horizontal hold mode is revised as displacement.
6) strain type rock burst judges: after excavation work completes, according to the tunnel strain type rock burst Evolution that the people such as what full sea academician propose, after roadway excavation completes, the phenomenon such as tunnel Bian Bi experienced by quiet period, particle bounce, scale off, can think and there occurs strain type rock burst.
Wherein, (2) and (5) are cores of the present invention, and all the other steps all can adopt existing techniques in realizing.
Embodiment: by carrying out under self-weight stress field and tectonic stress field synergy background, the realization of grouan round tunnel model excavate and unload strain type rock burst, analyzes stress and the visible ray picture of whole process, with the reliability of this verification method.
Select the grouan in Lai Zhou mine, Shandong, rock is processed into the model making round tunnel, is of a size of the cube of 150mm × 150mm × 150mm, middle drill diameter is the through hole of 45mm, carefully grinds sample, makes its flatness meet requirement of experiment.Experiment loading system selects RLW – 3000 microcomputer to control two axis servo pressure experiment machine.
Mechanics and deformation fracture analysis
Roadway model destructive process
The excavate and unload effect in the failure mode of Roadway model and biggest principal stress direction and tunnel is closely related.By carrying out high-speed camera to test specimen entirety, capture excavation rear tunnel inwall fault evolution rule.
Primary stage I: rock sample does not have generation and obviously breaks, is the roadway excavation process in certain stage casing on-the-spot, simulation mine, level is loaded on certain hydrostatic force with axial;
Twin shaft is protected and is carried a stage II: horizontal stress, axial stress remain unchanged 5min;
Roadway excavation off-load operation III: according to simulation simultaneous drifting or step excavation, this experimental simulation be distribution excavation.
, not there is strain type rock burst immediately, occurred restful phase in stabilization sub stage IV after roadway excavation: after excavate and unload completes.
Rock burst manifests and stage of development V: horizontal stress, axial stress remain unchanged, and under excavate and unload effect, slag appears falling in limit, hole left and right wall, and rock burst manifests.Along with the development of breaking, start to occur that sheet is peeled off, rock burst finally breaks out.
Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's implementation method of the present invention, should be understood to that protection scope of the present invention is not limited to so special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combination of not departing from essence of the present invention according to these technology enlightenment disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.
Claims (4)
1. excavation simulation Unloading Effect causes tunnel that an implementation method for strain type rock burst occurs, and it is characterized in that, comprises the following steps:
S1 test material preparation: choose the rock in roadway construction, is prefabricated into the rock sample of rule body shape, gets out round tube hole simulation tunnel in the centre of the pros and cons of inspection surface;
Filling coagulation post in S2 hole: control cement-sand ratio, add flocculating agent, by the mechanics parameter of the compressive strength of test coagulation post, tensile strength, Poisson ratio, elastic modulus, make the mechanical property of coagulation post and roadway surrounding rock parameter error control below 10%, then by concrete-agitating evenly after insert in through hole;
S3 control mode is selected: select twin shaft control mode, wherein axial load simulation gravity stress, horizontal load simulation tectonic stress;
S4 boundary condition is arranged: by level be axially set to stress boundary condition, and by level of control and the different terrestrial stress of axial load size simulated field, the power such as selections load level and are axially loaded on definite value;
The off-load of S5 roadway excavation operates: the first, is directed to the tunnel meeting the requirement of simultaneous drifting road, is disposablely disclosed by middle coagulation post, the disposable one-tenth lane of simulated field; The second, for needs repeatedly cycle operation formation tunnel, the gradation of simulated field becomes lane, is disclosed by coagulation post stage by stage.
2. a kind of excavation simulation Unloading Effect according to claim 1 causes tunnel that the implementation method of strain type rock burst occurs, and it is characterized in that, further comprising the steps of:
The rock burst of S6 strain type judges: after roadway excavation completes, tunnel Bian Bi experienced by quiet period, particle bounce, scale off phenomenon, can think and there occurs strain type rock.
3. a kind of excavation simulation Unloading Effect according to claim 1 causes tunnel that the implementation method of strain type rock burst occurs, and it is characterized in that, the rock sample of the rule body shape described in S1 is square or rectangular parallelepiped.
4. a kind of excavation simulation Unloading Effect according to claim 1 or 3 causes tunnel that the implementation method of strain type rock burst occurs, and it is characterized in that, the numerical value of the diameter in the round tube hole simulation tunnel described in S1 can not exceed the most minor face of rock sample long 1/3 to 1/5.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784976A (en) * | 2016-05-18 | 2016-07-20 | 武汉大学 | Dynamic rock mass unloading effect test device and test method thereof |
| CN106289835A (en) * | 2016-07-29 | 2017-01-04 | 安徽理工大学 | Simulation tunnel off-load controllable type experimental provision and using method thereof |
| CN106546484A (en) * | 2016-11-08 | 2017-03-29 | 安徽理工大学 | Deep tunnel Dynamic Excavation Load Relief System and experimental technique |
| CN107036917A (en) * | 2017-05-27 | 2017-08-11 | 武汉大学 | The Experimental Method in Laboratory of deep wall rock rock burst Burst Tendency |
| CN112213185A (en) * | 2020-08-25 | 2021-01-12 | 中国科学院武汉岩土力学研究所 | Rock tensile deformation modulus and tensile strength testing system and method |
| CN112362461A (en) * | 2020-12-07 | 2021-02-12 | 中国矿业大学(北京) | Tunnel rock burst simulation equipment and method |
| CN114778302A (en) * | 2022-06-17 | 2022-07-22 | 煤炭科学研究总院有限公司 | Rock mass stability determination method and device and electronic equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051011A (en) * | 2007-05-16 | 2007-10-10 | 中国矿业大学(北京) | Test method for deep rock explosion process model |
| CN102636398A (en) * | 2012-03-31 | 2012-08-15 | 中国矿业大学(北京) | Experiment method for simulating impact type rock burst |
| CN102721604A (en) * | 2012-06-28 | 2012-10-10 | 中国地质科学院地质力学研究所 | Device and method for physical simulation test of stability of deep tunnel surrounding rock |
-
2015
- 2015-11-11 CN CN201510764875.3A patent/CN105277673A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051011A (en) * | 2007-05-16 | 2007-10-10 | 中国矿业大学(北京) | Test method for deep rock explosion process model |
| CN102636398A (en) * | 2012-03-31 | 2012-08-15 | 中国矿业大学(北京) | Experiment method for simulating impact type rock burst |
| CN102721604A (en) * | 2012-06-28 | 2012-10-10 | 中国地质科学院地质力学研究所 | Device and method for physical simulation test of stability of deep tunnel surrounding rock |
Non-Patent Citations (2)
| Title |
|---|
| 基于多物理场参数变化的花岗岩巷道岩爆千兆模拟实验研究;张艳博等;《岩石力学与工程学报》;20140731;第33卷(第7期);1347-1357 * |
| 张艳博等: "基于多物理场参数变化的花岗岩巷道岩爆千兆模拟实验研究", 《岩石力学与工程学报》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784976A (en) * | 2016-05-18 | 2016-07-20 | 武汉大学 | Dynamic rock mass unloading effect test device and test method thereof |
| CN105784976B (en) * | 2016-05-18 | 2017-11-10 | 武汉大学 | A kind of method of testing using rock mass dynamic unloading effect tester for testing |
| CN106289835A (en) * | 2016-07-29 | 2017-01-04 | 安徽理工大学 | Simulation tunnel off-load controllable type experimental provision and using method thereof |
| CN106546484B (en) * | 2016-11-08 | 2019-08-30 | 安徽理工大学 | Deep tunnel Dynamic Excavation Load Relief System and experimental method |
| CN106546484A (en) * | 2016-11-08 | 2017-03-29 | 安徽理工大学 | Deep tunnel Dynamic Excavation Load Relief System and experimental technique |
| CN107036917A (en) * | 2017-05-27 | 2017-08-11 | 武汉大学 | The Experimental Method in Laboratory of deep wall rock rock burst Burst Tendency |
| CN107036917B (en) * | 2017-05-27 | 2019-05-10 | 武汉大学 | The Experimental Method in Laboratory of deep wall rock rock burst Burst Tendency |
| CN112213185A (en) * | 2020-08-25 | 2021-01-12 | 中国科学院武汉岩土力学研究所 | Rock tensile deformation modulus and tensile strength testing system and method |
| CN112213185B (en) * | 2020-08-25 | 2022-03-11 | 中国科学院武汉岩土力学研究所 | Rock tensile deformation modulus and tensile strength testing system and method |
| CN112362461A (en) * | 2020-12-07 | 2021-02-12 | 中国矿业大学(北京) | Tunnel rock burst simulation equipment and method |
| CN112362461B (en) * | 2020-12-07 | 2021-12-14 | 中国矿业大学(北京) | Tunnel rock burst simulation equipment and method |
| CN114778302A (en) * | 2022-06-17 | 2022-07-22 | 煤炭科学研究总院有限公司 | Rock mass stability determination method and device and electronic equipment |
| CN114778302B (en) * | 2022-06-17 | 2022-09-02 | 煤炭科学研究总院有限公司 | Rock mass stability determination method and device and electronic equipment |
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