CN206573380U - Coal petrography triaxial creepage seepage tests system - Google Patents
Coal petrography triaxial creepage seepage tests system Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 43
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000002655 kraft paper Substances 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims 1
- 239000002828 fuel tank Substances 0.000 claims 1
- 230000002045 lasting effect Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 29
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 20
- 238000007789 sealing Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 3
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
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Abstract
煤岩三轴蠕变渗流试验系统，包括三轴压力室、加载装置、变形测试装置、渗流装置和数据采集装置；三轴压力室包括上座、下座和螺栓；加载装置包括加压活塞杆、导向装置、油泵和进、排油孔；变形测试装置包括轴向应变传感器、金属线和传感器接线柱；渗流装置包括高压瓦斯气瓶、减压阀、气压表、进气管、出气管和气体流量计；数据采集装置包括数据线和计算机。本实用新型操作便捷，精度较高，可实现长时间蠕变加载，研究长期载荷条件下的煤岩应力场中蠕变过程中瓦斯渗流规律。
Coal and rock triaxial creep seepage test system, including triaxial pressure chamber, loading device, deformation testing device, seepage device and data acquisition device; triaxial pressure chamber includes upper seat, lower seat and bolts; loading device includes pressurized piston rod, Guide device, oil pump and oil inlet and outlet holes; deformation test device includes axial strain sensor, metal wire and sensor terminal; seepage device includes high-pressure gas cylinder, pressure reducing valve, air pressure gauge, inlet pipe, outlet pipe and gas flow meter; the data acquisition device includes a data line and a computer. The utility model has convenient operation and high precision, can realize long-term creep loading, and studies the law of gas seepage in the creep process in the stress field of coal and rock under long-term load conditions.
Description
技术领域technical field
本实用新型属于蠕变渗流装置技术领域，尤其涉及一种煤岩三轴蠕变渗流试验系统。The utility model belongs to the technical field of creep seepage devices, in particular to a coal rock triaxial creep seepage test system.
背景技术Background technique
煤炭埋藏于地层深部，是一种典型的孔隙-裂隙双重介质，与其伴生的瓦斯以吸附态、游离态赋存于其中。瓦斯在煤层中的流动包括瓦斯气体的吸附、解吸、扩散和渗流等过程，是一个非常复杂的运移过程。含瓦斯煤的渗透率是反映瓦斯气体在煤层中渗流难易程度的重要指标，标志着煤层瓦斯抽采难易程度的关键参数。 随着煤矿进入深部开采，煤层将进入高地应力、高渗透压力和高地温的恶劣环境，在外部载荷作用下具有很强的蠕变特性。 煤层瓦斯在运移过程中受到蠕变变形的影响，同时蠕变变形反过来也会影响煤层瓦斯的流动，这就是所谓的蠕变-渗流耦合效应。 正是这种效应使得煤层瓦斯抽采钻孔周围的瓦斯流动变得更加复杂，由于煤层瓦斯抽采关系到我国煤矿安全开采和瓦斯的综合利用等问题，所以研究含瓦斯煤的流变特性、受载破坏特征和瓦斯渗流-吸附解吸规律具有非常重要的现实意义。现有的煤岩三轴蠕变渗流试验系统结构复杂，精度欠缺，密封性差，不便于操作。Coal is buried deep in the formation and is a typical pore-fracture dual medium, and its associated gas exists in the adsorbed and free states. The flow of gas in the coal seam includes the processes of adsorption, desorption, diffusion and seepage of gas, which is a very complex migration process. The permeability of gas-containing coal is an important index reflecting the difficulty of seepage of gas in the coal seam, and a key parameter that marks the difficulty of gas extraction in the coal seam. As the coal mine enters deep mining, the coal seam will enter the harsh environment of high ground stress, high seepage pressure and high ground temperature, and has strong creep characteristics under the action of external loads. CBM is affected by creep deformation during migration, and creep deformation will in turn affect the flow of CBM, which is the so-called creep-seepage coupling effect. It is this effect that makes the gas flow around the coal seam gas drainage borehole more complicated. Since the coal seam gas drainage is related to the safety of coal mine mining and the comprehensive utilization of gas in my country, it is necessary to study the rheological characteristics of gas-containing coal, The characteristics of load failure and gas seepage-adsorption-desorption law have very important practical significance. The existing coal-rock triaxial creep seepage test system has complex structure, lack of precision, poor sealing and inconvenient operation.
实用新型内容Utility model content
本实用新型为了解决现有技术中的不足之处，提供了一种操作便捷，精度较高，可实现长时间蠕变加载的煤岩三轴蠕变渗流试验系统。In order to solve the deficiencies in the prior art, the utility model provides a coal-rock triaxial creep seepage test system with convenient operation, high precision and long-term creep loading.
为解决上述技术问题，本实用新型采用如下技术方案：煤岩三轴蠕变渗流试验系统包括三轴压力室、加载装置、变形测试装置、渗流装置和数据采集装置；三轴压力室包括上座、下座和螺栓，上座和下座之间设有密封垫圈，并通过螺栓连接固定；加载装置包括加压活塞杆、导向装置、油泵和进、排油孔，导向套和导向装置保证加压活塞杆在垂直方向对煤岩实施持续加载，油箱经过油泵和截止阀连接到进、排油孔，并通入到三轴压力室内；变形测试装置包括轴向应变传感器、金属线和传感器接线柱，热缩管套在煤岩外部，两端由金属箍固定，轴向应变传感器固定在加压活塞杆上，通过金属线接到传感器接线柱上；渗流装置包括高压瓦斯气瓶、减压阀、气压表、进气管、出气管和气体流量计，高压瓦斯气瓶出气端设有开关，进气管上依次设有减压阀、气压表和截止阀，并通入加压活塞杆，出气管接入气体流量计；数据采集装置包括数据线和计算机，传感器接线柱上的数据线连接到计算机，气体流量计的信息也传输到计算机。In order to solve the above technical problems, the utility model adopts the following technical scheme: the coal rock triaxial creep seepage test system includes a triaxial pressure chamber, a loading device, a deformation testing device, a seepage device and a data acquisition device; the triaxial pressure chamber includes an upper seat, The lower seat and the bolt, there is a sealing gasket between the upper seat and the lower seat, and it is fixed by bolt connection; the loading device includes a pressurized piston rod, a guide device, an oil pump, and oil inlet and outlet holes, and the guide sleeve and the guide device ensure that the pressurized piston The rod continuously loads the coal rock in the vertical direction, and the oil tank is connected to the oil inlet and outlet holes through the oil pump and the stop valve, and then into the triaxial pressure chamber; the deformation test device includes axial strain sensors, metal wires and sensor terminals, The heat-shrinkable tube is sleeved outside the coal rock, and the two ends are fixed by metal hoops. The axial strain sensor is fixed on the pressurized piston rod and connected to the sensor terminal through a metal wire; the seepage device includes a high-pressure gas cylinder, a pressure reducing valve, Barometer, air inlet pipe, air outlet pipe and gas flow meter, a switch is provided at the outlet end of the high-pressure gas cylinder, a pressure reducing valve, an air pressure gauge and a stop valve are arranged on the inlet pipe in turn, and the pressurized piston rod is connected to the air outlet pipe. The data acquisition device includes a data line and a computer, the data line on the sensor terminal is connected to the computer, and the information of the gas flow meter is also transmitted to the computer.
煤岩与热缩管之间使用卡夫特密封胶进行密封，并用金属箍对热缩管两端加固。Kraft sealant is used to seal the coal rock and the heat-shrinkable tube, and both ends of the heat-shrinkable tube are reinforced with metal hoops.
采用上述技术方案，本实用新型具有如下优点。By adopting the above technical solution, the utility model has the following advantages.
1、本实用新型的煤岩三轴蠕变渗流试验系统包括三轴压力室、加载装置、变形测试装置、渗流装置和数据采集装置，三轴压力室由上座和下座通过螺栓连接组成，密封良好，为蠕变渗流试验的煤岩提供了较好的密闭空间；加载装置分为轴向加载装置和径向加载装置，导向套和导向装置保证加压活塞杆在垂直方向对煤岩实施持续均匀加载，油箱中的液压油经过油泵、截止阀和进、排油孔通入到三轴压力室内，实现对煤岩的径向的均匀加载；变形测试装置用于实时监测煤岩蠕变过程中的轴向应变情况；渗流装置用于提供一定压力的瓦斯气体，实现加载条件下煤岩的渗流过程；数据采集装置用于实时采集瓦斯气体流量和煤岩受载条件下变形。1. The coal-rock triaxial creep seepage test system of the present utility model includes a triaxial pressure chamber, a loading device, a deformation testing device, a seepage device and a data acquisition device. The triaxial pressure chamber is composed of an upper seat and a lower seat connected by bolts, sealed Good, providing a better confined space for the coal and rock in the creep seepage test; the loading device is divided into an axial loading device and a radial loading device, and the guide sleeve and the guiding device ensure that the pressurized piston rod is continuously applied to the coal and rock in the vertical direction. Evenly loaded, the hydraulic oil in the oil tank is passed into the triaxial pressure chamber through the oil pump, the stop valve and the oil inlet and outlet holes, so as to realize the radial uniform loading of the coal rock; the deformation test device is used to monitor the creep process of the coal rock in real time The axial strain in the medium; the seepage device is used to provide a certain pressure of gas to realize the seepage process of coal and rock under loading conditions; the data acquisition device is used to collect real-time gas flow and deformation of coal and rock under loading conditions.
2、本实用新型采用变形测试装置，热缩管套在煤岩外部，两端由金属箍固定，轴向应变传感器固定在加压活塞杆上，并随着煤岩的轴向变形而发生变形，应变信息通过金属线传输到传感器接线柱上，并被计算机实时采集，数据以图线的形式在计算机上显示，为科研人员节省了数据处理时间。2. The utility model adopts a deformation testing device. The heat-shrinkable tube is set outside the coal rock, and the two ends are fixed by metal hoops. The axial strain sensor is fixed on the pressurized piston rod, and deforms with the axial deformation of the coal rock. , The strain information is transmitted to the sensor terminal through the metal wire, and is collected by the computer in real time, and the data is displayed on the computer in the form of graph lines, which saves data processing time for researchers.
附图说明Description of drawings
图1是本实用新型的结构示意图。Fig. 1 is the structural representation of the utility model.
其中，1：下座；2：上座；3：螺栓；4：进、排油孔；5：导向装置；6：加压活塞杆；7：进气管；8：导向套；9：排空气孔；10：金属箍；11：热缩管；12：轴向应变传感器；13：煤岩；14：金属线；15：传感器接线柱；16：数据线；17：出气管；18：气体流量计；19：计算机；20：油箱；21：油泵；22：截止阀；23：高压瓦斯气瓶；24：开关；25：减压阀；26：气压表；27：截止阀；28：密封垫圈。Among them, 1: Lower seat; 2: Upper seat; 3: Bolt; 4: Oil inlet and outlet holes; 5: Guide device; 6: Pressurized piston rod; 7: Air intake pipe; 8: Guide sleeve; 9: Air exhaust hole ;10: metal ferrule; 11: heat shrink tube; 12: axial strain sensor; 13: coal rock; 14: metal wire; 15: sensor terminal; 16: data line; 17: gas outlet pipe; 18: gas flow meter ;19: computer; 20: oil tank; 21: oil pump; 22: shut-off valve; 23: high-pressure gas cylinder; 24: switch; 25: pressure reducing valve;
具体实施方式detailed description
如图1所示，本实用新型的煤岩三轴蠕变渗流试验系统包括三轴压力室、加载装置、变形测试装置、渗流装置和数据采集装置；三轴压力室包括上座2、下座1和螺栓3，上座2和下座1之间设有密封垫圈28，并通过螺栓3连接固定；加载装置包括加压活塞杆6、导向装置5、油泵21和进、排油孔4，导向套8和导向装置5保证加压活塞杆6在垂直方向对煤岩13实施持续加载，油箱20经过油泵21和截止阀22连接到进、排油孔4，并通入到三轴压力室内；变形测试装置包括轴向应变传感器12、金属线14和传感器接线柱15，热缩管11套在煤岩13外部，两端由金属箍14固定，轴向应变传感器12固定在加压活塞杆6上，通过金属线14接到传感器接线柱15上；渗流装置包括高压瓦斯气瓶23、减压阀25、气压表26、进气管7、出气管17和气体流量计18，高压瓦斯气瓶23出气端设有开关24，进气管7上依次设有减压阀25、气压表26和截止阀27，并通入加压活塞杆6，出气管17接入气体流量计18；数据采集装置包括数据线16和计算机19，传感器接线柱15上的数据线16连接到计算机19，气体流量计18的信息也传输到计算机19。As shown in Figure 1, the coal-rock triaxial creep seepage test system of the present utility model includes a triaxial pressure chamber, a loading device, a deformation testing device, a seepage device and a data acquisition device; the triaxial pressure chamber includes an upper seat 2 and a lower seat 1 And the bolt 3, a sealing washer 28 is arranged between the upper seat 2 and the lower seat 1, and is connected and fixed by the bolt 3; the loading device includes a pressurized piston rod 6, a guide device 5, an oil pump 21, and oil inlet and outlet holes 4, and a guide sleeve 8 and the guide device 5 ensure that the pressurized piston rod 6 is continuously loaded on the coal rock 13 in the vertical direction, and the oil tank 20 is connected to the oil inlet and outlet holes 4 through the oil pump 21 and the stop valve 22, and is connected to the triaxial pressure chamber; deformation The test device includes an axial strain sensor 12, a metal wire 14 and a sensor terminal 15. The heat-shrinkable tube 11 is set outside the coal rock 13, and the two ends are fixed by metal hoops 14. The axial strain sensor 12 is fixed on the pressurized piston rod 6 , connected to the sensor terminal 15 through the metal wire 14; the seepage device includes a high-pressure gas cylinder 23, a pressure reducing valve 25, a barometer 26, an air inlet pipe 7, an air outlet pipe 17 and a gas flow meter 18, and the high-pressure gas cylinder 23 is discharged. A switch 24 is provided at the end, and a pressure reducing valve 25, an air pressure gauge 26 and a stop valve 27 are successively provided on the inlet pipe 7, and the pressurized piston rod 6 is connected to it, and the gas outlet pipe 17 is connected to the gas flow meter 18; the data acquisition device includes data Line 16 and computer 19, the data line 16 on the sensor terminal 15 is connected to the computer 19, and the information of the gas flow meter 18 is also transmitted to the computer 19.
煤岩13与热缩管11之间使用卡夫特密封胶进行密封，并用金属箍10对热缩管11两端加固。Kraft sealant is used to seal between the coal rock 13 and the heat-shrinkable tube 11 , and both ends of the heat-shrinkable tube 11 are reinforced with metal hoops 10 .
本实用新型的工作过程为：将煤岩13安放在加压活塞杆6正下方，涂上一层卡夫特密封胶，套上热缩管11，并用热风吹热缩管11使其收缩包紧煤岩13，然后用金属箍10对热缩管11上、下端加固，保证煤岩13与三轴压力室隔开，再将轴向应变传感器12固定在加压活塞杆6上，其下端引出的金属线14接到传感器接线柱15上；上座2和下座1之间安装密封垫圈28，并通过螺栓3连接固定；对加压活塞杆6施加一定轴向载荷值，打开排空气孔9和截止阀22，启动油泵21，油箱20中的液压油通过进、排油孔4进入且充满三轴压力室，液压油对煤岩13维持一定的围压载荷，关闭排空气孔9、截止阀22和油泵21；最后，打开高压瓦斯气瓶24出气端的开关24和截止阀27，调节减压阀25，使气压表26显示试验所需瓦斯压力值，瓦斯气体经过进气管7从煤岩13上端进入，运移到下端经过出气管17和气体流量计18；试验过程中，计算机19会实时采集煤岩13的蠕变数据和渗流数据，并以图像的形式显示出来含瓦斯煤的应力-应变曲线。The working process of the utility model is as follows: place the coal rock 13 directly under the pressurized piston rod 6, apply a layer of Kraft sealant, put on the heat shrinkable tube 11, and blow the heat shrinkable tube 11 with hot air to make it shrink. Tighten the coal rock 13, and then reinforce the upper and lower ends of the heat-shrinkable tube 11 with metal ferrules 10 to ensure that the coal rock 13 is separated from the triaxial pressure chamber, and then fix the axial strain sensor 12 on the pressurized piston rod 6, and its lower end The lead-out metal wire 14 is connected to the sensor terminal 15; the sealing washer 28 is installed between the upper seat 2 and the lower seat 1, and is connected and fixed by the bolt 3; a certain axial load value is applied to the pressurized piston rod 6, and the air exhaust hole is opened 9 and the shut-off valve 22, start the oil pump 21, the hydraulic oil in the oil tank 20 enters through the oil inlet and outlet holes 4 and fills the triaxial pressure chamber, the hydraulic oil maintains a certain confining pressure load on the coal rock 13, and closes the exhaust holes 9, Stop valve 22 and oil pump 21; finally, open the switch 24 and stop valve 27 of the gas outlet end of the high-pressure gas cylinder 24, adjust the pressure reducing valve 25, so that the barometer 26 displays the gas pressure value required for the test, and the gas passes through the inlet pipe 7 from the coal The upper end of the rock 13 enters and moves to the lower end through the gas outlet pipe 17 and the gas flow meter 18; during the test process, the computer 19 will collect the creep data and seepage data of the coal rock 13 in real time, and display the gas-containing coal in the form of an image. stress-strain curve.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108120644A (en) * | 2017-12-20 | 2018-06-05 | 湖南科技大学 | The creep test device and method of duct rock sample under a kind of gas pressure |
| CN108489799A (en) * | 2018-02-27 | 2018-09-04 | 中国科学院武汉岩土力学研究所 | A kind of three axis of rock gas/naked triaxial compression test device, system and method |
| CN109187926A (en) * | 2018-09-18 | 2019-01-11 | 太原理工大学 | Three axis seepage flow test device of fractured coal and rock and desorption-diffusion-seepage tests system |
| CN110487703A (en) * | 2019-10-01 | 2019-11-22 | 太原理工大学 | Hypotonic coal-bed gas slips coefficient accurate measurement method |
| WO2020029497A1 (en) * | 2018-08-06 | 2020-02-13 | Xi'an University Of Science And Technology | A seepage-creep and mechanical experimental system for coal and rock mass containing gas under triaxial loading in low-temperature environment |
| CN111982699A (en) * | 2020-09-01 | 2020-11-24 | 西南交通大学 | Unsaturated soil compression characteristic and permeability characteristic test device |
| CN112832743A (en) * | 2021-01-15 | 2021-05-25 | 西南石油大学 | A quick-measurement cement sheath integrity test device and evaluation method |
| CN112858020A (en) * | 2021-01-14 | 2021-05-28 | 中国石油大学(北京) | Rock triaxial confining pressure loading and seepage test device and method |
| CN115078105A (en) * | 2022-05-24 | 2022-09-20 | 太原理工大学 | Asymmetric load soft rock creep-seepage test device and test method |
| CN119959510A (en) * | 2025-04-11 | 2025-05-09 | 太原理工大学 | A coal creep-seepage response monitoring system and prediction method |
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2017
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