CN105181463A - Water-containing gangue compression testing device and testing method thereof - Google Patents

Water-containing gangue compression testing device and testing method thereof Download PDF

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Publication number
CN105181463A
CN105181463A CN201510697402.6A CN201510697402A CN105181463A CN 105181463 A CN105181463 A CN 105181463A CN 201510697402 A CN201510697402 A CN 201510697402A CN 105181463 A CN105181463 A CN 105181463A
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spoil
water
steel cylinder
displacement sensor
test
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CN201510697402.6A
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赵同彬
郭伟耀
李占海
刘晓明
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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Priority to CN201510697402.6A priority Critical patent/CN105181463A/en
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Abstract

The invention discloses a water-containing gangue compression testing device and a testing method thereof. The water-containing gangue compression testing device comprises a steel barrel for storing gangues, wherein the steel barrel is divided into a plurality of layers from the whole height; a pressure sensor and a stay wire displacement sensor are arranged on each layer; the steel barrel is put on a testing machine to be subjected to a compression test so as to obtain a compression ratio and force magnitude relation of gangues on different-height layers; the same batch of gangues are tested again, but the difference is as follows: a fixed amount of water is injected at the height of a certain layer, and a compression test is carried out; the compression ratio and force magnitude relations of the gangues before and after the water is added are compared to obtain the influences on a compression process by the moisture content of the gangues on the certain layers; by that analogy, a plurality of times of tests are carried out to obtain the influences on the compression process by the moisture content of the gangues at different-height positions. The water-containing gangue compression testing device and the testing method thereof, disclosed by the invention, not only can be used for underground engineering of gangue mining with filling and the like, but also can be used for the fields of building and traffic engineering including geotechnical side slope stability analysis, gravel foundation treatment, roadbed deformation calculation and the like.

Description

A kind of moisture spoil compression test device and test method thereof
Technical field
The present invention relates to a kind of spoil compression test device and test method thereof.
Background technology
In order to realize lasting exploit; ensure that coal mining and environmental protection develop in harmony; mining scholar and engineering technical personnel propose filling mining technology, by compaction materials such as spoil, flyash, lotions along with the propelling of coal-face is fills up to the production technique in goaf, workplace rear.Adopt waste filling production technique can control strata movement and subsidence, accomplish spoil not gug, reduce ground waste dump, save a large amount of soil, effectively suppress coal seam and roof and floor dynamic phenomenon, protection ecology of mining areas, realizes safety in production.In waste filling production technique, spoil is a kind of discrete material, is directly filled with in goaf as permanent support body, and under the pressure of overlying strata, spoil is compacted sclerosis, plays a supportive role to overlying strata.Therefore, the compacting deformation characteristic studying spoil has great significance for the success or not of filling.
Be stored in certain aqueous environment because the reasons such as swallet, ventilation depositing dust aproll, coal seam water infusion cause underground filling spoil always to compose, in moisture situation, the compacting deformation characteristic of spoil and the spoil of state of nature also exist marked difference, the effect of water can make the mechanical characteristics such as the intensity of spoil, deformation failure change, and weakens the supporting role of spoil to overlying strata.The decrement of spoil in compacting process and stressed size analyze the important parameter of spoil compression property, because spoil is discrete material, stress cannot be delivered to bottom preferably as rigid body from top, cause the decrement of spoil differing heights position in pressurized process and stressedly to vary in size, and the water cut of differing heights position, goaf spoil is also not quite similar.Therefore, grasp the decrement of the moisture compacting deformation characteristic of differing heights position spoil and differing heights position spoil and stressed size, can be goaf filling engineering and test basis and guidance are provided, significant to control subsidence.
Chinese patent application CN203053782U discloses a kind of waste filling test compression mould, compression test is carried out mainly for loose spoil, its function singleness, does not consider the compression property of spoil under different moisture content, and how to measure the decrement of differing heights position spoil and stressed size.
Chinese patent application CN100337107C discloses a kind of testing method of polyphase coupling creep of fragmented rock body and device thereof, is applicable to the compression creep of fragmented rock body, solid-liquid coupling and solid-gas coupling permeability test; Chinese patent application CN2532480Y discloses a kind of fractured rock and non-consolidation porous material permeability test attachment device, can be used to permeability test and the compression test of carrying out fractured rock.In above-mentioned technology, although the compression test of the broken coal petrography of different moisture content can be carried out, but in process of the test, water is composed and is stored in whole sample spoil, does not consider that the water cut of differing heights position spoil is different, also cannot measure the decrement of differing heights position spoil and stressed size.
On the other hand, spoil compression test method of the prior art, can not meet while carrying out spoil compression test, the water cut of research differing heights position spoil is on the impact of compression process, and the decrement of the real time measure spoil differing heights position and stressed size.
Summary of the invention
The object of the invention is, be solve to measure the decrement of spoil differing heights position and stressed size, provides a kind of easy and simple to handle, the one be suitable in laboratory moisture spoil compression test device and test method thereof.
The technical scheme that the present invention is adopted for achieving the above object is:
A kind of moisture spoil compression test device, is characterized in that, it comprises platen, the water permeating board bottom steel cylinder, the infiltration base placing steel cylinder and water outlet base in the steel cylinder of a splendid attire spoil, steel cylinder and some injecting cylinders for subsequent use; Wherein,
Described steel cylinder is divided into multilayer on whole height, and every layer height line of steel cylinder cylindrical shell is provided with the water inlet screw be arranged symmetrically with;
With volume markings on described injecting cylinder, the bottom surface of injecting cylinder is connected with the water injection conduit that band controls inflow valve, the water side of water injection conduit is provided with the external thread matched with the water inlet screw of steel cylinder, makes water injection conduit can be connected on steel cylinder water inlet screw by external thread;
All pressure transducer is embedded with in spoil in described steel cylinder every layer; The cylindrical shell top of described steel cylinder is fixed with stay wire displacement sensor, and it is equal that quantity and the steel cylinder of stay wire displacement sensor divide the number of plies, and the pull head of stay wire displacement sensor is arranged in every layer of spoil of steel cylinder, and pull head bracing wire is connected with stay wire displacement sensor;
Described platen is provided with the guide hole identical with pressure transducer total quantity with stay wire displacement sensor; Described infiltration base is a recessed bases, is provided with some water seepage holes in groove;
Described water outlet base is for placing infiltration base, and water outlet base is provided with water outlet groove and exhalant canal.
Further, described steel cylinder is provided with 20 water inlet screws, and 20 water inlet screws are evenly distributed on five height, and four water inlet screws of each height are arranged symmetrically with.
Further, described stay wire displacement sensor is fixed on support, and support is on threaded rod, be provided with expansion link and clip, and threaded rod is arranged on the support screw of steel cylinder, displacement transducer is clamped on clip, regulates the position of stay wire displacement sensor with expansion link.
Further, described platen is a boss type cylindrical steel, and the major diameter of boss is mated with the internal diameter of steel cylinder.
The test method of above-mentioned moisture spoil compression verification device, comprises the steps:
The first step: the decrement of test differing heights position spoil and stressed magnitude relationship
1.1st step, assembles the moisture compression test device of differing heights position spoil, is first placed on water outlet base by infiltration base in laboratory;
1.2nd step, places water permeating board in infiltration base groove, then places upper steel cylinder, and adopts O-ring seal to make the contact sealing gap process of steel cylinder outer wall and base groove;
1.3rd step, lays sample spoil in steel cylinder, while laying spoil, buries the pull head of stay wire displacement sensor and pressure transducer underground position to each height layer;
1.4th step, until spoil paving to time top, platen is positioned in steel cylinder, the bracing wire of stay wire displacement sensor and the wire of pressure transducer are passed from the guide hole of platen, and ensure that platen is in horizontality, ensure that the bracing wire of stay wire displacement sensor is on the axis of guide hole;
1.5th step, stay wire displacement sensor on steel cylinder fixedly mounts, the bracing wire of stay wire displacement sensor in connection; The signal wire of stay wire displacement sensor and pressure transducer is connected on laboratory data Acquisition Instrument;
1.6th step, is positioned over the said apparatus assembled on testing machine lower platen, regulates the top board of testing machine pressure to contact with platen end face, can carry out load test; By the data of data collecting instrument record testing machine, stay wire displacement sensor and pressure transducer during loading, the data of record can be transferred to Real time vision; At the end of to be tested, stop loading, the data of record are preserved and processes, thus obtain the stressed size of each height layer and compressibility relation in loading procedure;
1.7th step: take off spoil compression set, unload stay wire displacement sensor, slowly take out platen, and carry out draining, spoil cleaning and take out pressure transducer, treat that next time is used;
Second step: the water cut of test differing heights position spoil is on the impact of compression process
2.1st step, determines testing program, comprises the level number of test and the amount of water of this layer;
2.2nd step, according to the 1.1st step-1.5 step assembling experimental provision; Require that the spoil of test and the spoil of the first step are same batch;
2.3rd step, the test layer height determined according to testing program and amount of water, be threaded in the water injection conduit of injecting cylinder on the water inlet screw of this layer, and carry out encapsulation process; The water inlet screw of all the other height is carried out shutoff sealing;
2.4th step, is positioned over the test unit assembled on testing machine lower platen, by injecting cylinder to water filling in spoil, closes water injection conduit valve after reaching the water yield of testing program setting; Then start load test according to the 1.6th step, obtain the compressibility of spoil in this testing program and the relation of stressed size; Require that loading force situation is tested identical with the first step;
2.5th step, the test findings the 2.4th step obtained is compared with the 1.6th step test findings, thus the water cut that can obtain the level number spoil related in this testing program is on the impact of compression process; Off-test, takes off spoil compression set, unloads injecting cylinder and stay wire displacement sensor, slowly takes out platen, and carries out draining, spoil cleaning and take out pressure transducer, treats that next time is used;
2.6th step, by that analogy, test of many times, obtains the water cut of differing heights position spoil to the impact of compression process.
Beneficial effect of the present invention:
1, the moisture compression test of differing heights position spoil can be carried out in laboratory, by the inflow regulating the setting height(from bottom) of injecting cylinder to control differing heights position spoil, change traditional whole wet method of moisture spoil compression test sample; Synchronously can realize spoil water inlet and spoil compression test, the decrement of differing heights position compression spoil and stressed size can be obtained.
2, after sample spoil reaches capacity, unnecessary water can outwards flow out, avoid still be soaked in water after spoil reaches capacity and fluid pressure on the impact of spoil deformation characteristic, and then ensure the reliability that moisture spoil compression property is tested.
3, regulated the position of stay wire displacement sensor by expansion link, further ensure the structural rationality of whole experimental provision and practicality.
4, whole experimental provision has the features such as structure is simple, volume is little, easy and simple to handle, can be goaf filling engineering and provides test basis and guidance, has important scientific meaning to control subsidence.
5, being widely used, except can be used for the Problems of Underground Engineerings such as waste filling exploitation, also can be used for building, the traffic engineering fields such as Rock Soil Slope Stability analysis, telford base process and subgrade deformation calculating.
Accompanying drawing explanation
Fig. 1 is spoil compression test device schematic diagram of the present invention;
Fig. 2 is steel cylinder stack shell front view of the present invention;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is that the present invention seeps water base front view;
Fig. 5 is water outlet base front view of the present invention;
Fig. 6 is displacement sensor bracket front view of the present invention;
Fig. 7 is the vertical view of Fig. 6.
In figure, 1-platen, 2-displacement sensor bracket, 3-steel cylinder, 4-injecting cylinder, 5-seeps water base, 6-water outlet base, 7-water permeating board, 8-testing machine lower platen, 9-testing machine top board, 10-pressure transducer, 11-data collecting instrument, 12-computing machine, 101-guide hole, 201-threaded rod, 202-spring, 203-clip, 204-stay wire displacement sensor, 205-bracing wire, 206-pull head, 207-expansion link, 301-is intake screw, 302-support screw, 401-water injection conduit, 402-valve, 501-base groove, 502-water seepage hole, 601-water outlet groove, 602-exhalant canal.
Embodiment
Further illustrate embodiment with reference to the accompanying drawings.
As shown in Figure 1, the moisture compression test device of a kind of differing heights position spoil, it comprises platen 1, the water permeating board 7 bottom steel cylinder 3, the infiltration base 5 placing steel cylinder 3 and water outlet base 6 in the steel cylinder 3 of a splendid attire spoil, steel cylinder 3 and some injecting cylinders 4 for subsequent use; Wherein,
Described steel cylinder 3 is divided into five layers on whole height, and the altitude line of steel cylinder 3 cylindrical shell every layer is provided with the water inlet screw 301 be arranged symmetrically with, and steel cylinder 3 end face is provided with support screw 302, as shown in Figure 2,3;
With volume markings on described injecting cylinder 4, the bottom surface of injecting cylinder 4 is connected with the water injection conduit 401 that band controls inflow valve 402, the water side of water injection conduit 401 is provided with the external thread matched with the water inlet screw 301 of steel cylinder 3, makes water injection conduit 401 can be connected on steel cylinder water inlet screw 301 by external thread;
All be embedded with pressure transducer 10 in described steel cylinder 3 spoil of every layer, the pull head 206 that the cylindrical shell top of described steel cylinder 3 is fixed with five stay wire displacement sensors, 204, five stay wire displacement sensors 204 is arranged in five layers of spoil of steel cylinder 3; Pull head 206 bracing wire 205 is connected with stay wire displacement sensor 204;
Described platen 1 is provided with ten guide holes 101;
The infiltration base 5 of described placement steel cylinder is a recessed bases, is provided with some water seepage holes 502, as shown in Figure 4 in groove 501;
Described water outlet base 6 is for placing infiltration base 5, and water outlet base 6 is provided with water outlet groove 601 and exhalant canal 602, as shown in Figure 5; Water outlet groove 601 and exhalant canal 602 are used for deriving the water that oozes out of infiltration base 5.
Further, described steel cylinder 3 is provided with 20 water inlet screw 301,20 water inlet screws and is evenly distributed on five height, and four water inlet screws 301 of each height are arranged symmetrically with.
Further, described stay wire displacement sensor 204 is fixed on support, support is on threaded rod 201, be provided with expansion link 207 and clip 203, threaded rod 201 is arranged on the support screw 302 of steel cylinder 3, stay wire displacement sensor 204 is clamped on clip 203, regulates the position of stay wire displacement sensor 204 with expansion link 207.Clip 203 is driven by spring 202, as shown in Figure 6,7.
Further, described platen 1 is a boss type cylindrical steel, and the major diameter of boss is mated with the internal diameter of steel cylinder 3.
The using method of said apparatus of the present invention, with reference to Fig. 1, comprises the steps:
The first step: the decrement of test differing heights position spoil and stressed magnitude relationship
1.1st step, assembles the moisture compression test device of differing heights position spoil, is first placed on water outlet base 6 by infiltration base 5 in laboratory;
1.2nd step, places water permeating board 7 in infiltration base groove 501, then places upper steel cylinder 3; And adopt O-ring seal to make the contact sealing gap process of steel cylinder 3 outer wall and infiltration base groove 501;
1.3rd step, lays sample spoil in steel cylinder 3; While laying spoil, bury the pull head 206 of stay wire displacement sensor 204 and pressure transducer 10 underground position to each height layer;
1.4th step, until spoil paving to time top, platen 1 is positioned in steel cylinder 3, the wire of the bracing wire of stay wire displacement sensor 201 and pressure transducer 10 is passed from the guide hole of platen 1, and ensure that platen 1 is in horizontality, ensure that the bracing wire of stay wire displacement sensor 201 is on the axis of guide hole 101;
1.5th step, steel cylinder 3 fixedly mounts stay wire displacement sensor 204, the bracing wire 205 of stay wire displacement sensor 204 in connection; The signal wire of stay wire displacement sensor 204 and pressure transducer 10 is connected on laboratory data Acquisition Instrument 11;
1.6th step, is positioned over the said apparatus assembled on testing machine lower platen 8, regulates testing machine top board 9 to contact with platen 1 end face, can carry out load test; Recorded the data of testing machine, stay wire displacement sensor 204 and pressure transducer 10 during loading by data collecting instrument 11, the data of record can be transferred to computing machine 12 and show in real time; At the end of to be tested, stop loading, the data of record are preserved and processes, thus obtain the stressed size of each height layer and compressibility relation in loading procedure;
1.7th step: take off spoil compression set, unloads stay wire displacement sensor 204, slowly takes out platen 1, and carries out draining, spoil cleaning and take out pressure transducer 10, treats that next time is used;
Second step: the water cut of test differing heights position spoil is on the impact of compression process
2.1st step, determines testing program, comprises the level number of test and the amount of water of this layer
2.2nd step, according to the 1.1st step-1.5 step assembling test unit, requires that the spoil of test and the spoil of the first step are same batch;
2.3rd step, the test layer height determined according to testing program and amount of water, be threaded in the water injection conduit 401 of injecting cylinder 4 on the water inlet screw 301 of this layer, and carry out encapsulation process; The water inlet screw 301 of all the other height is carried out shutoff sealing;
2.4th step, is positioned over the test unit assembled on testing machine lower platen 8, by injecting cylinder 4 to water filling in spoil, closes water injection conduit valve 402 after reaching the water yield of testing program setting; Then start load test according to the 1.6th step, obtain the compressibility of spoil in this testing program and the relation of stressed size, require that loading force situation is tested identical with the first step;
2.5th step, the test findings the 2.4th step obtained is compared with the 1.7th step test findings, thus the water cut that can obtain the level number spoil related in this testing program is on the impact of compression process; Off-test, takes off spoil compression set, unloads injecting cylinder 4 and stay wire displacement sensor 204, slowly takes out platen 1, and carries out draining, spoil cleaning and take out pressure transducer 10, treats that next time is used;
2.6th step, by that analogy, test of many times, obtains the water cut of differing heights position spoil to the impact of compression process.

Claims (5)

1. a moisture spoil compression test device, is characterized in that, it comprises the platen in the steel cylinder of a splendid attire spoil, steel cylinder, the water permeating board bottom steel cylinder, the infiltration base placing steel cylinder and water outlet base and some injecting cylinders for subsequent use; Wherein,
Described steel cylinder is divided into multilayer on whole height, and every layer height line of steel cylinder cylindrical shell is provided with the water inlet screw be arranged symmetrically with;
With volume markings on described injecting cylinder, the bottom surface of injecting cylinder is connected with the water injection conduit that band controls inflow valve, the water side of water injection conduit is provided with the external thread matched with the water inlet screw of steel cylinder, makes water injection conduit can be connected on steel cylinder water inlet screw by external thread;
All pressure transducer is embedded with in spoil in described steel cylinder every layer; The cylindrical shell top of described steel cylinder is fixed with stay wire displacement sensor, and it is equal that quantity and the steel cylinder of stay wire displacement sensor divide the number of plies, and the pull head of stay wire displacement sensor is arranged in every layer of spoil of steel cylinder, and pull head bracing wire is connected with stay wire displacement sensor;
Described platen is provided with the guide hole identical with pressure transducer total quantity with stay wire displacement sensor; Described infiltration base is a recessed bases, is provided with multiple water seepage hole in groove;
Described water outlet base is for placing infiltration base, and water outlet base is provided with water outlet groove and exhalant canal.
2. moisture spoil compression test device as claimed in claim 1, is characterized in that, described steel cylinder is provided with 20 water inlet screws, and 20 water inlet screws are evenly distributed on five height, and four water inlet screws of each height are arranged symmetrically with.
3. moisture spoil compression test device as claimed in claim 1, it is characterized in that, described stay wire displacement sensor is fixed on support, support is on threaded rod, be provided with expansion link and clip, threaded rod is arranged on the support screw of steel cylinder, displacement transducer is clamped on clip, regulates the position of stay wire displacement sensor with expansion link.
4. moisture spoil compression test device as claimed in claim 1, it is characterized in that, described platen is a boss type cylindrical steel, and the major diameter of boss is mated with the internal diameter of steel cylinder.
5. a test method for the moisture spoil compression test device as described in as arbitrary in claim 1-4, it is characterized in that, step is as follows:
The first step: the decrement of test differing heights position spoil and stressed magnitude relationship
1.1st step, assembles the moisture compression test device of differing heights position spoil, is first placed on water outlet base by infiltration base in laboratory;
1.2nd step, places water permeating board in infiltration base groove, then places upper steel cylinder, and adopts O-ring seal to make the contact sealing gap process of steel cylinder outer wall and base groove;
1.3rd step, lays sample spoil in steel cylinder, while laying spoil, buries the pull head of stay wire displacement sensor and pressure transducer underground position to each height layer;
1.4th step, until spoil paving to time top, platen is positioned in steel cylinder, the bracing wire of stay wire displacement sensor and the wire of pressure transducer are passed from the guide hole of platen, and ensure that platen is in horizontality, ensure that the bracing wire of stay wire displacement sensor is on the axis of guide hole;
1.5th step, stay wire displacement sensor on steel cylinder fixedly mounts, the bracing wire of stay wire displacement sensor in connection; The signal wire of stay wire displacement sensor and pressure transducer is connected on laboratory data Acquisition Instrument;
1.6th step, is positioned over the said apparatus assembled on testing machine lower platen, regulates the top board of testing machine pressure to contact with platen end face, can carry out load test; By the data of data collecting instrument record testing machine, stay wire displacement sensor and pressure transducer during loading, the data of record are transferred to Real time vision; At the end of to be tested, stop loading, the data of record are preserved and processes, thus obtain the stressed size of each height layer and compressibility relation in loading procedure;
1.7th step: take off spoil compression set, unload stay wire displacement sensor, slowly take out platen, and carry out draining, spoil cleaning and take out pressure transducer, treat that next time is used;
Second step: the water cut of test differing heights position spoil is on the impact of compression process
2.1st step, determines testing program, comprises the level number of test and the amount of water of this layer;
2.2nd step, according to the 1.1st step-1.5 step assembling experimental provision; Require that the spoil of test and the spoil of the first step are same batch;
2.3rd step, the test layer height determined according to testing program and amount of water, be threaded in the water injection conduit of injecting cylinder on the water inlet screw of this layer, and carry out encapsulation process; The water inlet screw of all the other height is carried out shutoff sealing;
2.4th step, is positioned over the test unit assembled on testing machine lower platen, by injecting cylinder to water filling in spoil, closes water injection conduit valve after reaching the water yield of testing program setting; Then start load test according to the 1.6th step, obtain the compressibility of spoil in this testing program and the relation of stressed size; Require that loading force situation is tested identical with the first step;
2.5th step, the test findings the 2.4th step obtained is compared with the 1.6th step test findings, thus the water cut that can obtain the level number spoil related in this testing program is on the impact of compression process; Off-test, takes off spoil compression set, unloads injecting cylinder and stay wire displacement sensor, slowly takes out platen, and carries out draining, spoil cleaning and take out pressure transducer, treats that next time is used;
2.6th step, by that analogy, test of many times, obtains the water cut of differing heights position spoil to the impact of compression process.
CN201510697402.6A 2015-10-23 2015-10-23 Water-containing gangue compression testing device and testing method thereof Pending CN105181463A (en)

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RU2769392C1 (en) * 2018-11-06 2022-03-31 Чайна Юниверсити Оф Майнинг Энд Текнолоджи Monitoring system maintaining the compression ratio of a filled formation in the mined space of a coal mine, and method for monitoring
US11414991B2 (en) 2018-11-06 2022-08-16 China University Of Mining And Technology System and method for monitoring bearing compression rate of filler in coal mine gob area
CN111638138A (en) * 2020-07-16 2020-09-08 东北大学 Device and method for testing compression performance of filling dispersion under dynamic-static acting force

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