CN201716255U - Rock permeability testing device - Google Patents

Rock permeability testing device Download PDF

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Publication number
CN201716255U
CN201716255U CN201020257446XU CN201020257446U CN201716255U CN 201716255 U CN201716255 U CN 201716255U CN 201020257446X U CN201020257446X U CN 201020257446XU CN 201020257446 U CN201020257446 U CN 201020257446U CN 201716255 U CN201716255 U CN 201716255U
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CN
China
Prior art keywords
pressure
upstream
rock
water
water pipe
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Application number
CN201020257446XU
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Chinese (zh)
Inventor
胡江春
祝彦知
李晓芬
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中原工学院
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Priority to CN201020257446XU priority Critical patent/CN201716255U/en
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Publication of CN201716255U publication Critical patent/CN201716255U/en

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Abstract

The utility model relates to a rock permeability testing device, comprising a geo-triaxial apparatus and also comprising a pressure containing cavity, a pressurizing cap, water-permeable stones, an upstream water pipe, a downstream water pipe, an upstream pressure meter, a downstream pressure container and a water valve, wherein the pressure containing cavity is in a cylinder shape; a tested rock sample is arranged in the middle of a pressure containing cavity, and the outer side of the tested rock sample is sheathed with a rubber film; the upper water-permeable stone and the lower water-permeable stone are positioned in the pressure containing cavity; the upper end of the upper water-permeable stone is provided with the pressurizing cap; the upper end of the pressurizing cap is contacted with a pressing rod of the geo-triaxial apparatus; the upstream water pipe is contacted with the upper end surface of the upper water-permeable stone; and the front end of the downstream water pipe is contacted with the lower water-permeable stone. The rock permeability testing device is simple in structure, can realize testing of the permeability characteristics of partial rock by using a transient pressure pulse method by only needing to make slight change to the common geo-triaxial apparatus and arranging the pressure containing cavity, the water-permeable stones and the rubber film, is convenient in use and low in cost and is convenient for testing the permeability characteristics of the common rock.

Description

The rock permeability proving installation
Technical field
The utility model relates to the construction work instrument and equipment, and particularly the building materials pervasion test device specifically is a kind of rock permeability proving installation.
Background technology
Perviousness is a kind of critical nature of hole and fissuted medium.The scope that the rock permeability coefficient distributes surpasses 10 orders of magnitude.In general, water-bearing zone and the store oil rock with higher infiltration coefficient paid close attention in petroleum engineering and hydrogeological field; And earthquake and the concern of structure geology research field is the non-deposition rock that has than the hyposmosis coefficient.This patent master is noted that a kind of method of testing of fluid penetrating power in rock.Rock is as a kind of medium of low-permeability, the method of laboratory build-in test has constant flow pump method, pressure oscillations method and transient pressure impulse method etc., the transient pressure impulse method is to obtain permeability by the pressure change of measuring sample pressure at two ends container, and this method has become the important tests method of test least permeable medium Penetration Signature.Existing its structure of transient pressure pulse rock permeability proving installation is comparatively complicated, the cost height.
Summary of the invention
The purpose of this utility model is to provide a kind of rock permeability proving installation, and described this rock permeability proving installation will solve rock proving installation complex structure in the prior art, technical matters that cost is high.
The purpose of this utility model is achieved through the following technical solutions: comprise earthwork triaxial apparatus, this rock permeability proving installation also comprises pressure chamber, add pressure cap, permeable stone, the upstream water pipe, the downstream water pipe, the upstream pressure table, downstream pressure sensor and water valve, it is cylindric that pressure chamber is, the rock sample of test is located at the pressure chamber middle part, the rock sample outside of test is arranged with rubber membrane, this sample upper end is provided with upper dankness stone, the sample lower end is provided with down permeable stone, upper dankness stone and following permeable stone are positioned at pressure chamber, the upper dankness stone upper end is provided with and adds pressure cap, adding the pressure cap upper end contacts with the depression bar of earthwork triaxial apparatus, the upstream water pipe passes and adds pressure cap and contact with the upper dankness stone upper surface, downstream water pipe front end contacts with following permeable stone, be connected with the upstream water pipe and be provided with the upstream pressure table, be connected with the downstream water pipe and be provided with downstream pressure sensor, this upstream pressure table is a digital pressure gauge, the upstream pressure table is connected with a controller, controller is connected with downstream pressure sensor, and the upstream water pipe is provided with water valve.
Be provided with O-ring seal between the ring flange of earthwork triaxial apparatus and its base.
The utility model is compared with prior art, and its effect is actively with tangible.This rock permeability proving installation, simple in structure, only need common geotechnological triaxial test machine is changed slightly, pressure chamber, permeable stone and rubber membrane are set, because rock permeability is little, therefore adopt computer control, improve tail water pressure detection precision, with the Penetration Signature that realizes coming the part of detecting rock, easy to use with the transient pressure impulse method, cost is low, is convenient to the rock permeability characteristic test of general applications.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
The utility model is described in further detail by embodiment below in conjunction with accompanying drawing.
As shown in Figure 1, in the present embodiment, comprise earthwork triaxial apparatus 1, this rock permeability proving installation also comprises pressure chamber 2, add pressure cap 3, permeable stone, upstream water pipe 6, downstream water pipe 7, upstream pressure table 8, downstream pressure sensor 9 and water valve 10, pressure chamber 2 is cylindric, the rock sample 11 of test is located at pressure chamber 2 middle parts, the rock sample outside of test is arranged with rubber membrane, these sample 11 upper ends are provided with upper dankness stone 4, the sample lower end is provided with down permeable stone 5, upper dankness stone 4 and following permeable stone 5 are positioned at pressure chamber 2, upper dankness stone 4 upper ends are provided with and add pressure cap 3, adding pressure cap 3 upper ends contacts with the depression bar 12 of earthwork triaxial apparatus, upstream water pipe 6 passes and adds pressure cap 3 and contact with upper dankness stone 4 upper surfaces, water pipe 7 front ends in downstream contact with following permeable stone 5, be connected with upstream water pipe 6 and be provided with upstream pressure table 8, be connected with downstream water pipe 7 and be provided with downstream pressure sensor 9, this upstream pressure table 8 is digital pressure gauges, upstream pressure table 8 is connected with a controller 13, controller 13 is connected with downstream pressure sensor 9, and upstream water pipe 6 is provided with water valve 10.Be provided with O-ring seal between the ring flange 14 of earthwork triaxial apparatus and its base 15.Controller 13 obtains the measured value of upstream pressure water meter and downstream pressure sensor, moves the program of solidifying in it and is analyzed.
Controller can adopt single-chip microcomputer, PLC (Programmable Logic Controller) etc. to have the device of numerical value processing power.
Adopt the method for the utility model test rock permeability characteristic, it comprises the preparation of rock sample, the installation of rock sample, the test of correlation parameter and four steps of calculating of infiltration coefficient:
(1) preparation of rock sample: select the object that needs research, need to take the rock of test, process drilling grinder preface, make cylindric sample, its size is generally Φ 39.1 * 80 (mm) and Φ 61.8 * 125 (mm), if rock is fine and close, the height of sample can suitably reduce.
(2) installation of rock sample: get the sample that has made, with holding the film tube rubber membrane is enclosed within outside the sample, sample is installed in the pressure chamber of corresponding size, sample is loaded onto the permeable stone of suitable dimension up and down, and the pressure cap that adds that links to each other with the back-pressure water pipe is installed on top.The pressure chamber is contained on the triaxial apparatus, and the bottom places the O-ring seal hermetic seal, guarantees that the ring flange bottom is connected closely with base.The top depression bar with add pressure cap and closely contact.
(3) test of correlation parameter: before the infiltration sample carries out, check in the coefficient of viscosity of the water of test, the compressibility coefficient of fluid, the compressibility coefficient of mineral substrate, the factor of porosity of experimental test sample and effective compressibility by the correlation technique handbook earlier.The parameter that process of the test should be tested comprises: the sectional area of sample and length, the time dependent curve of upstream and downstream pressure.The sectional area of sample and length are just determined when sample preparation, just can determine with its length of vernier caliper measurement and diameter before the sample.Earlier provide a pressure as upstream pressure with back-pressure during test, the pressure after stablizing with the sensor test of test pore water pressure is as downstream pressure; Improve back-pressure pressure then, close the back-pressure water injection valve after predetermined pressure, observational record upstream pressure (back-pressure tensimeter) and downstream pressure (pore water pressure sensor) concern over time.
(4) calculating of infiltration coefficient: the constants of nature of known materials and fluid, the measured result that changes along with the time according to sample upstream and downstream pressure:
P(0,t)=P d(t) t≥0
P(l,t)=P u(t) t≥0
Go out infiltration coefficient by the following formula inverse
0<x<l and t>0
In the following formula: P is a ground pore pressure in the sample; P dPressure for the sample downstream; P uPressure for the sample upstream; X is the distance apart from downstream end face; T is the time; L is the length of sample; K is an infiltration coefficient; μ is the coefficient of viscosity of water; S sFor than the rate of storing.

Claims (2)

1. rock permeability proving installation, comprise earthwork triaxial apparatus, it is characterized in that: this rock permeability proving installation also comprises pressure chamber, add pressure cap, permeable stone, the upstream water pipe, the downstream water pipe, the upstream pressure table, downstream pressure sensor and water valve, it is cylindric that pressure chamber is, the rock sample of test is located at the pressure chamber middle part, the rock sample outside of test is arranged with rubber membrane, this sample upper end is provided with upper dankness stone, the sample lower end is provided with down permeable stone, upper dankness stone and following permeable stone are positioned at pressure chamber, the upper dankness stone upper end is provided with and adds pressure cap, adding the pressure cap upper end contacts with the depression bar of earthwork triaxial apparatus, the upstream water pipe passes and adds pressure cap and contact with the upper dankness stone upper surface, downstream water pipe front end contacts with following permeable stone, be connected with the upstream water pipe and be provided with the upstream pressure table, be connected with the downstream water pipe and be provided with downstream pressure sensor, this upstream pressure table is a digital pressure gauge, the upstream pressure table is connected with a controller, controller is connected with downstream pressure sensor, and the upstream water pipe is provided with water valve.
2. rock permeability proving installation as claimed in claim 1 is characterized in that: be provided with O-ring seal between the ring flange of earthwork triaxial apparatus and its base.
CN201020257446XU 2010-07-14 2010-07-14 Rock permeability testing device CN201716255U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020257446XU CN201716255U (en) 2010-07-14 2010-07-14 Rock permeability testing device

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Application Number Priority Date Filing Date Title
CN201020257446XU CN201716255U (en) 2010-07-14 2010-07-14 Rock permeability testing device

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CN201716255U true CN201716255U (en) 2011-01-19

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102384874A (en) * 2011-08-24 2012-03-21 中原工学院 Method and pressure chamber for measuring crack characteristics of damaged rock
CN102621006A (en) * 2012-03-30 2012-08-01 中国矿业大学(北京) Pressure chamber for rock-soil rheological test
CN103335928A (en) * 2013-05-30 2013-10-02 中国石油天然气集团公司 Method and apparatus for measuring permeability of porous rock
CN103558136A (en) * 2013-11-07 2014-02-05 大连海事大学 System and method for testing rock damage and permeability under coupling effect of temperature stress and circumferential seepage
CN105092385A (en) * 2015-08-06 2015-11-25 山东科技大学 High-pressure water sealing device for rock sample and use method
CN105158141A (en) * 2015-09-08 2015-12-16 河海大学 Recyclable coarse fracture high velocity seepage testing apparatus
CN108007772A (en) * 2017-10-24 2018-05-08 江苏师范大学 A kind of permeability test system for testing triaxial pressure

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102384874A (en) * 2011-08-24 2012-03-21 中原工学院 Method and pressure chamber for measuring crack characteristics of damaged rock
CN102384874B (en) * 2011-08-24 2014-09-03 中原工学院 Method and pressure chamber for measuring crack characteristics of damaged rock
CN102621006A (en) * 2012-03-30 2012-08-01 中国矿业大学(北京) Pressure chamber for rock-soil rheological test
CN102621006B (en) * 2012-03-30 2015-07-08 中国矿业大学(北京) Pressure chamber for rock-soil rheological test
CN103335928A (en) * 2013-05-30 2013-10-02 中国石油天然气集团公司 Method and apparatus for measuring permeability of porous rock
CN103335928B (en) * 2013-05-30 2015-03-04 中国石油天然气集团公司 Method and apparatus for measuring permeability of porous rock
CN103558136A (en) * 2013-11-07 2014-02-05 大连海事大学 System and method for testing rock damage and permeability under coupling effect of temperature stress and circumferential seepage
CN103558136B (en) * 2013-11-07 2016-07-06 大连海事大学 Damage of rock and Permeation Test System and method of testing under temperature stress hoop seepage flow coupling
CN105092385A (en) * 2015-08-06 2015-11-25 山东科技大学 High-pressure water sealing device for rock sample and use method
CN105092385B (en) * 2015-08-06 2018-01-26 山东科技大学 A kind of rock sample high-pressure water seal device and application method
CN105158141A (en) * 2015-09-08 2015-12-16 河海大学 Recyclable coarse fracture high velocity seepage testing apparatus
CN108007772A (en) * 2017-10-24 2018-05-08 江苏师范大学 A kind of permeability test system for testing triaxial pressure

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