CN103471914A - Triaxial impact ground pressure true simulation test system - Google Patents
Triaxial impact ground pressure true simulation test system Download PDFInfo
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- CN103471914A CN103471914A CN2013104254623A CN201310425462A CN103471914A CN 103471914 A CN103471914 A CN 103471914A CN 2013104254623 A CN2013104254623 A CN 2013104254623A CN 201310425462 A CN201310425462 A CN 201310425462A CN 103471914 A CN103471914 A CN 103471914A
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Abstract
The invention discloses a triaxial impact ground pressure true simulation test system. The triaxial impact ground pressure true simulation test system is characterized by comprising a flexible loading unit, a confining pressure loading unit and an impact loading unit, wherein the flexible loading unit is used for applying vertical pressure on a test piece through a loading oil cylinder and a counterforce steel strand, the confining pressure loading unit is used for enabling the test piece to be under the condition of triaxial stress, the impact loading system is used for applying impact load on the test piece, the test piece is destroyed under the conditions of high stress and impact disturbance, the strength of the test piece is reduced, the test piece generates a certain displacement, in the process, the counterforce steel strand in the flexible loading unit is used for quickly supplementing load to the test piece, and further the extrusion and the action of external surrounding rocks to coal and rock masses are simulated. The triaxial impact ground pressure true simulation test system can be used for well simulating the occurring conditions of impact ground pressure, and the triaxial loading conditions are especially applicable to the simulation of gravity type impact ground pressure in a mining roadway.
Description
Technical field
The present invention relates to the research of deep engineering rock burst pests occurrence rule, particularly relate to the true three axle simulation experiment systems of a kind of rock burst.
Background technology
Rock burst refers to around colliery roadway or coal face, coal and rock under the high-ground stress condition is subject to roof break or blast disturbance failure, and be subject to the further crushing failure at high speed effect of country rock in destructive process, instantaneous relase huge energy and produce the mine motive force phenomenon of destruction.Often be attended by the huge sound, coal and rock is thrown to the phenomenons such as digging space and blast, cause the destruction of support apparatus in the digging space and the distortion in digging space, cause casualties when serious and the breaking-up of roadway, even cause surface subsidence and cause local earthquake.
Rock burst is the major issue that mining industry faces, having a strong impact on the safety in production of mine, especially, in during deep mining operation, country rock is under condition of high ground stress, be subject to Overlying Strata In A Face fracture disturbance, mining roadway are easy to occur rock blast hazard.Research rock burst pests occurrence rule, not only will pass through theoretical analysis, more will explore its essential laws by simulating lab test.
Think according to field observation and theoretical analysis, in lab simulation rock burst phenomenon, need meet following three necessary conditions:
by loading, make coal and rock under high-stress state;
coal and rock under condition of high ground stress is applied to impact load, the impact of the stress wave caused with the fracture of simulation overburden of the goaf to tunnel;
supplement rapidly loading in the process of destroying in coal and rock, makeup energy, do work to the further extruding of coal and rock to simulate outside country rock.But, also do not have at present equipment can meet above-mentioned three conditions simultaneously, laboratory simulation becomes the bottleneck of the research of rock burst.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of and can make the test specimen load that withstands shocks under three axle condition of high ground stress, and in the test specimen destructive process the true three axle simulation experiment systems of rock burst of makeup energy rapidly.
For achieving the above object, the present invention adopts following technical proposals:
The true three axle simulation experiment systems of a kind of rock burst, is characterized in that, comprises flexible loading unit, confined pressure loading unit and impact loading unit;
Described flexible loading unit, comprise base, load cylinder, servo oil sources, load backing plate, reaction plate, counter-force steel strand wires; Load cylinder one end is supported on base, and the other end applies xial feed to test specimen; The reaction plate left and right sides is respectively equipped with for connecting the through hole of counter-force steel strand wires; The counter-force steel strand wires have many, wherein any end is fixed on base, the other end is fixed on reaction plate, for reaction plate is applied to counter-force, and when being subject to impacting, reaction plate can not produce buttressing effect, when test specimen destroys, under elastic reaction, moment shrinks, and test specimen is supplemented and loads fast;
Described confined pressure loading unit, comprise loading frame, load backing plate, load cylinder, servo oil sources, and load cylinder is fixed on four medial surfaces of loading frame, and load cylinder is exerted pressure to test specimen under the driving of servo oil sources;
Described impact loading unit, for to the rock sample test specimen, applying vertical impact load, comprise and impact pouring weight, arm, lifting gear and guide piece, impact the weight of pouring weight and highly all can regulate, lifting gear is fixed on arm for promoting the impact pouring weight, guide surface indicates scale, for measuring the height that impacts pouring weight, and can prevent from impacting when pouring weight falls deflection occurs;
Described test specimen is cube shaped, and centre has perforated holes or the half hole of level, and the test specimen surface scribbles lubricant, to reduce the friction force be subject in its deformation process.
The present invention can also comprise TT&C system, and described TT&C system, for measuring and load that the controlled loading oil cylinder applies and the displacement of generation, comprises load and displacement measurement unit, servo control unit; Described load and displacement measurement unit comprise and are arranged at three strain gauge and LVDT extensometers on the direction load maintainer, for load and the displacement of measuring the test specimen different boundary, and measurement result are sent to the servo-control system unit; Described servo-control system unit comprises 3 independently numerical control units, controls respectively load and the displacement of three directions according to described load and displacement detecting and controlling unit measurement result.
Principle of the present invention is:
The flexible loading unit of the present invention applies vertical pressure by load cylinder and counter-force steel strand wires to test specimen, and in this process, the counter-force steel strand wires have certain elastic elongation, then by the confined pressure loading unit, make test specimen under condition of triaxial stress; By impact loading system, test specimen is applied to impact load, the impact of the stress wave caused with the fracture of simulation overburden of the goaf to tunnel, because the counter-force steel strand wires are flexible material, can as conventional rigid posts, not impact (buttressing effect) by the impact load, realized first allowing further the withstand shocks target of load of test specimen under specific triaxial load condition; Test specimen destroys under heavily stressed and shock vibration condition, certain displacement also occurs in its strength decreased, and the counter-force steel strand wires moment contraction in this process in flexible loading unit, supplement rapidly loading to test specimen, be makeup energy, simulated the further extruding acting of outside country rock to coal and rock;
The present invention has simulated the occurrence condition of rock burst preferably, and three axle loading environments are particularly useful for simulating the gravity-type rock burst occurred in mining roadway.
The accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the invention will be further described:
Accompanying drawing 1 is the agent structure schematic top plan view of the present invention before reaction plate and counter-force steel strand wires are installed;
Accompanying drawing 2 is flexible loading unit agent structure front elevational schematic of the present invention.
Embodiment
By reference to the accompanying drawings 1 and 2, the true three axle simulation experiment systems of a kind of rock burst, is characterized in that, comprises flexible loading unit, confined pressure loading unit and impact loading unit.
Described flexible loading unit, comprise base 1, load cylinder 2, servo oil sources, load backing plate 3, reaction plate 4, counter-force steel strand wires 5; Load cylinder 2 one ends are supported on base 1, and the other end applies xial feed to test specimen 6; Reaction plate 4 left and right sides are respectively equipped with for connecting the through hole of counter-force steel strand wires 5; Counter-force steel strand wires 5 have many, wherein any end is fixed on base, the other end is fixed on reaction plate, for reaction plate is applied to counter-force, and when being subject to impacting, reaction plate 4 can not produce buttressing effect, when test specimen 6 destroys, under elastic reaction, moment shrinks, and test specimen is supplemented and loads fast; Described test specimen 6 is cube shaped, the perforated holes or the half hole that there is level in the middle of having, and the test specimen surface scribbles lubricant, to reduce the friction force be subject in its deformation process.
Described confined pressure loading unit, comprise loading frame 7, load backing plate 8, load cylinder 9, servo oil sources, and load cylinder 9 is fixed on four medial surfaces of loading frame 7, under the driving of servo oil sources, test specimen 6 is exerted pressure.
Described impact loading system, for to the rock sample test specimen, applying vertical impact load, comprise and impact pouring weight, arm, lifting gear and guide piece, impact the weight of pouring weight and highly all can regulate, lifting gear is fixed on arm for promoting the impact pouring weight, guide surface indicates scale, for measuring the height that impacts pouring weight, and can prevent from impacting when pouring weight falls deflection occurs.
The present invention can also comprise TT&C system, and described TT&C system, for measuring and load that the controlled loading oil cylinder applies and the displacement of generation, comprises load and displacement measurement unit, servo control unit; Described load and displacement measurement unit comprise and are arranged at three strain gauge and LVDT extensometers on the direction load maintainer, for load and the displacement of measuring the test specimen different boundary, and measurement result are sent to the servo-control system unit; Described servo-control system unit comprises 3 independently numerical control units, controls respectively load and the displacement of three directions according to described load and displacement detecting and controlling unit measurement result.
The above embodiment, be a kind of of the more preferably concrete embodiment of the present invention, and the common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacement all should be included in protection scope of the present invention.
Claims (3)
1. the true three axle simulation experiment systems of rock burst, is characterized in that, comprises flexible loading unit, confined pressure loading unit and impact loading unit;
Described flexible loading unit, comprise base, load cylinder, servo oil sources, load backing plate, reaction plate, counter-force steel strand wires; Load cylinder one end is supported on base, and the other end applies xial feed to test specimen; The reaction plate left and right sides is respectively equipped with through hole; The counter-force steel strand wires have many, and wherein any end is fixed on base, and the other end is fixed on reaction plate;
Described confined pressure loading unit, comprise loading frame, load backing plate, load cylinder, servo oil sources, and load cylinder is fixed on four medial surfaces of loading frame;
Described impact loading unit, for to the rock sample test specimen, applying vertical impact load, comprise and impact pouring weight, arm, lifting gear and guide piece, impact the weight of pouring weight and highly all can regulate, lifting gear is fixed on arm for promoting the impact pouring weight, and guide surface indicates scale.
2. the true three axle simulation experiment systems of a kind of rock burst according to claim 1, is characterized in that, described test specimen is cube shaped, and centre has perforated holes or the half hole of level, and the test specimen surface scribbles lubricant.
3. true three axle simulation experiment systems of a kind of rock burst according to claim 1, it is characterized in that comprising TT&C system, described TT&C system comprises load and displacement measurement unit, servo control unit, described load and displacement measurement unit comprise and be arranged at three strain gauge and LVDT extensometers on the direction load maintainer, and described servo-control system unit comprises 3 independently numerical control units.
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| CN104390859A (en) * | 2014-11-18 | 2015-03-04 | 山东科技大学 | True triaxial simulation test device for three-directional rigid loading impact ground pressure |
| CN104614244A (en) * | 2015-02-13 | 2015-05-13 | 武汉科技大学 | High-stress roadway stability similarity simulation test device and method |
| CN105043903A (en) * | 2015-06-26 | 2015-11-11 | 黑龙江科技大学 | Rock burst/rock explosion analog simulation energy storage-time tank device |
| CN106338439A (en) * | 2015-07-09 | 2017-01-18 | 核工业北京地质研究院 | True triaxial rock mechanical property testing device |
| CN106442143A (en) * | 2016-10-10 | 2017-02-22 | 青岛科技大学 | Soft-rock-like-simulated-roadway-project model test device |
| CN106525595A (en) * | 2016-10-26 | 2017-03-22 | 中国科学院武汉岩土力学研究所 | Method capable of conducting true or false triaxial test |
| CN106769548A (en) * | 2016-12-09 | 2017-05-31 | 重庆大学 | There is bump simulation test device and its method in coal seam with gas |
| CN107561246A (en) * | 2017-09-29 | 2018-01-09 | 中冶交通建设集团有限公司 | A kind of slope model test device |
| CN107589026A (en) * | 2017-09-05 | 2018-01-16 | 辽宁工程技术大学 | A kind of bump analogue means and wireless data acquisition system |
| CN107764714A (en) * | 2017-10-13 | 2018-03-06 | 北京宇心科技有限公司 | A kind of axle pressure loading device and heat flow piercement device |
| CN108106940A (en) * | 2018-01-05 | 2018-06-01 | 华侨大学 | A kind of triaxial tests instrument test specimen apparatus for measuring quality |
| CN108507863A (en) * | 2018-04-09 | 2018-09-07 | 龙岩学院 | A kind of charging assembly and its pressure experimental device |
| CN108519277A (en) * | 2018-04-09 | 2018-09-11 | 龙岩学院 | A kind of impact assembly and its pressure experimental device |
| CN108535126A (en) * | 2018-05-07 | 2018-09-14 | 洛阳理工学院 | A kind of test model and test method of simulation deep tunnel Blasting Excavation |
| CN108918284A (en) * | 2018-07-25 | 2018-11-30 | 重庆大学 | A kind of visualization true triaxial experimental provision |
| CN109141518A (en) * | 2018-07-10 | 2019-01-04 | 中国矿业大学(北京) | A kind of big stage afterwards filling body unstable failure test device of unilateral exposure and method |
| CN109269904A (en) * | 2018-10-10 | 2019-01-25 | 辽宁工程技术大学 | A kind of coal and rock multi- scenarios method integration experimental rig based on drilling cuttings method |
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| WO2019223389A1 (en) * | 2018-12-24 | 2019-11-28 | 山东科技大学 | Tunnel surrounding rock support strength test apparatus and strength determination method |
| CN110780056A (en) * | 2019-11-18 | 2020-02-11 | 四川农业大学 | Test device for simulating movable fault to research on tunnel damage mechanism and using method |
| CN111157372A (en) * | 2020-02-17 | 2020-05-15 | 北京科技大学 | Drop hammer impact test system and method for simulating engineering rock mass layer cracking instability process |
| CN111366472A (en) * | 2020-03-31 | 2020-07-03 | 北京爱新能智科技有限公司 | True triaxial hydraulic fracturing physical simulation equipment and method for variable core size |
| CN112461669A (en) * | 2020-11-10 | 2021-03-09 | 中国矿业大学 | Experimental method and device for dynamic disaster of rock burst in roadway excavation |
| CN112964569A (en) * | 2021-02-19 | 2021-06-15 | 河南城建学院 | Full-automatic temperature control true triaxial apparatus |
| CN113984553A (en) * | 2021-10-26 | 2022-01-28 | 中煤科工开采研究院有限公司 | Energy calculation method based on coal rock mass impact failure process under true triaxial test condition |
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