CN105043920A - Test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and instrument - Google Patents
Test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and instrument Download PDFInfo
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Abstract
Belonging to testing methods and instruments for rock mass constant temperature and rock mass strain, the invention relates to a test method for measuring rock mass constant temperature adsorption and monitoring rock mass strain and an instrument. According to the test method, rock mass constant temperature adsorption capacity is measured by an indirect gravitational method, at the same time, transverse and longitudinal strain gauges can be pasted to a side of a tested sample, the strain condition of the rock sample is monitored while the rock sample reaches adsorption equilibrium, thus being convenient to analyze the relation between rock mass adsorption and rock mass microscopic stress. A plurality of adsorption tanks are added, also adsorption test is carried out on rock samples in different particle size ranges at the same time, the rock mass sample particle size measurement range is wide, and the particle size test range covers 100micrometer-20mm. The test method calculates the sample adsorbing capacity by high precision balance weighing, which is different from the previous volumetric method for measurement of adsorbing capacity. The method can be used for determining the adsorbing capacity of rock to gas in laboratories, test enterprises and government departments. The test instrument is single, has few joints, enhances the system airtightness, and has the characteristics of simple operation, simple and reliable calculation method, and high accuracy.
Description
Technical field
The present invention relates to method of testing and the instrument of a kind of rock mass constant temperature and strain of rock mass, particularly a kind of method of testing and instrument measuring rock mass thermostatic absorption and monitoring strain of rock mass.
Background technology
The understanding more deep for the ability of coal seam adsorption gas and coal-seam gas composition, pressure has important impetus for coal and coal-seam gas industry.For many years, the isothermal adsorption test of coal sample is always as the standard of ability of evaluation ocurrence of coal seam gas and other gas.
Traditionally, the test of rock mass thermostatic absorption generally adopts volumetric method (volumetric method), but the rock mass sample of traditional volumetric method test mostly is Powdered, and quality is less, and method of testing and calculation of complex.In addition gravitational method and draining is also had to get gas method etc.
Conventional bulk area method and gravitational method all need two tanks, i.e. sample pot and with reference to tank, particularly volumetric method, needs to check accurately with reference to tank (corresponding with adsorption tanks, be used for asking and calculate gas injection rate) volume, then calculated the gas flow of injecting gas by gas equation.The subject matter of this method is more difficult with reference to the precise calibration of tank, operates more loaded down with trivial details, computation process more complicated.And the measurement of gas method is got in traditional draining, there is the shortcomings such as precision is lower, testing procedure is loaded down with trivial details.Simultaneously traditional method sample pot and other tank bodies and gas injection equipment connection more, also there is the shortcoming that system sealing is poor.
Summary of the invention
The object of the invention is to provide a kind of method of testing and the instrument of measuring rock mass thermostatic absorption and monitoring strain of rock mass, solve by the test of coal sample isothermal adsorption as coal-bed gas composes the problem that the ability of depositing provides evaluation criterion.
The object of the present invention is achieved like this: the method for testing of this rock mass constant temperature and strain of rock mass: by the thermostatic absorption ability of indirect gravitational method test rock mass, transverse direction and longitudinal strain sheet can be pasted at surveyed sample side simultaneously, reach the strained situation of simultaneously monitoring rock sample in the process of adsorption equilibrium at rock sample, be convenient to analyze the relation between rock mass absorption and rock mass microstress;
The concrete steps of method:
1, source of the gas steel cylinder 1 taps into airshed valve 2 and is connected with adsorption tanks 10, and the vacuum pump 4 airshed valve that runs in is connected with adsorption tanks;
2, adsorption tanks 10 are arranged in constant temperature water bath room 7, ensure the temperature constant in rock sample absorption test process;
3, the pressure transducer 8 external data gather and analysis instrument 9 on adsorption tanks 10 top, gaseous tension in Real-Time Monitoring adsorption tanks 10;
4, survey rock sample side paste laterally with longitudinal strain sheet 11, and access data gather and analysis instrument 9, monitors and records the strain in rock sample thermostatic absorption process;
5, test rock sample when gaseous tension no longer changes in adsorption tanks 10 and reach adsorption equilibrium, adsorption tanks are decomposed from testing table, then with high precision balance, it is weighed;
6, multiple adsorption tanks 10 can be installed in constant temperature water bath room 7 simultaneously, are convenient to do measurement of comparison to the rock sample within the scope of different-grain diameter simultaneously;
7, after reaching adsorption equilibrium in adsorption tanks 10, close charge flow rate valve 2, opening pressure sensor interface and strain line interface, close the closing valve on adsorption tanks 10 top, then adsorption tanks are taken out, with precision balance, whole adsorption tanks are weighed, comprise rock sample quality and gases at high pressure quality, finally can extrapolate the amount of substance of free state gas in adsorption tanks.
Described adsorption tanks 10 top is provided with gas pressure sensor 8, and adsorption tanks internal gas pressure data are transferred to data collection and transmission by pressure transducer 8, when gaseous tension in adsorption tanks arrives set pressure point, closes charge flow rate valve 2.
Further, when data collection and analysis instrument 9 shows that in adsorption tanks, pressure reaches predetermined value, manual-lock charge flow rate valve 2, close draught excluder 5 simultaneously, after this because the suction-operated of coal sample to gas causes pressure in adsorption tanks to reduce gradually, namely on data collection and analysis instrument 9, reading reduces gradually, when pressure reading tends towards stability, can think and reach adsorption equilibrium in adsorption tanks 10;
Constant temperature water bath control system mainly comprises radiator valve 6 and constant temperature water bath room 7; Whole adsorption tanks 10 are in water bath, ensure that Dynamic Adsorption carries out at the same temperature;
The pressure signal that pressure transducer 8 collects by finally demonstrating reading after digital-to-analog conversion on data collection and analysis instrument 9; The strain information of foil gauge collection is inner by being stored in data collection and analysis instrument 9 after digital-to-analog conversion.
Testing tool comprises: source of the gas steel cylinder 1, charge flow rate valve 2, extraction flow valve 3, vacuum pump 4, radiator valve 6, constant temperature water bath room 7, pressure transducer 8, data collection and analysis instrument 9, adsorption tanks 10 and foil gauge 11; Source of the gas steel cylinder 1 is connected with adsorption tanks 10 by charge flow rate valve 2, and vacuum pump 4 is connected with adsorption tanks 10 by extraction flow valve 3; Adsorption tanks 10 are placed in heat-seal and completely cut off inside cavity, adsorption tanks 10 top is provided with gas pressure sensor 8, gas pressure sensor 8 is connected with data collection and analysis instrument 9, and the foil gauge 11 be attached on rock sample side is connected with data collection and analysis instrument 9 by adsorption tanks 10 top; Radiator valve 6 is connected on constant temperature water bath room.
Described adsorption tanks 10 are provided with strain interfaces of connecting wires, and transverse direction and the longitudinal strain sheet 11 of rock sample side are external to data collection and analysis instrument 9 by connection jaws, and then obtain strain of rock mass data in rock sample adsorption process.
Described adsorption tanks 10 top is provided with gas pressure sensor 8, and adsorption tanks 10 internal gas pressure data are transferred to data collection and transmission by pressure transducer 8, when gaseous tension in adsorption tanks arrives set pressure point, closes charge flow rate valve 2.
Beneficial effect, owing to have employed such scheme, when data collection and analysis instrument 9 shows that in adsorption tanks 10, pressure reaches predetermined value, manual-lock charge flow rate valve 2, close draught excluder 5, after this because the suction-operated of coal sample to gas causes pressure in adsorption tanks 10 to reduce gradually, namely on data collection and analysis instrument 9, reading reduces gradually simultaneously, when pressure reading tends towards stability, can think and reach adsorption equilibrium in adsorption tanks; Whole adsorption tanks are in water bath, ensure that Dynamic Adsorption carries out at the same temperature; The pressure signal that pressure transducer 8 collects by finally demonstrating reading after digital-to-analog conversion on data collection and analysis instrument 9; The strain information that foil gauge 11 gathers is inner by being stored in data collection and analysis instrument 9 after digital-to-analog conversion.
Advantage: this method of testing is directly weighed by high precision balance and draws gas injection rate, avoids the difficulty of checking with reference to tank high precision.Method of testing is simple, and test process reliability is high.
Avoid the complicated calculations of traditional relative volume method, sample pot to a certain extent and check step with reference to tank connected sealing problem and loaded down with trivial details reference tank volume, avoid conventional discharge get gas method measuring accuracy lower with testing procedure the problem such as loaded down with trivial details, turn increase the advantage being calculated dead volume gas flow by real gas state equation compared to traditional gravitational method.This method only uses single adsorption tank to test, after gas injection adsorption equilibrium, direct employing high precision balance weighs the total gas flow drawing adsorption tanks mesohigh gas, by the gas flow in true figure's equation accurate Calculation dead volume, both differences are the gas flow of absorption, and this testing tool is single, and junction is few, enhance the sealing of system, operate comparatively simply simultaneously, computing method are simple and reliable, degree of accuracy is high.
Accompanying drawing explanation
In order to more clearly state the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, and the accompanying drawing in describing is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is thermostatic absorption method of testing structural representation structural drawing of the present invention.
Fig. 2 is that high precision balance of the present invention is weighed schematic diagram figure.
In figure, 1, source of the gas steel cylinder; 2, charge flow rate valve; 3, extraction flow valve; 4, vacuum pump; 5, draught excluder; 6, radiator valve; 7, constant temperature water bath room; 8, pressure transducer; 9, data collection and analysis instrument; 10, adsorption tanks; 11, foil gauge; 12, coal sample is tested.
Embodiment
Be clearly and completely described the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art belong to protection scope of the present invention not making the every other embodiment obtained under creative work prerequisite.
The method of testing of this rock mass constant temperature and strain of rock mass: by the thermostatic absorption ability of indirect gravitational method test rock mass, transverse direction and longitudinal strain sheet can be pasted at surveyed sample side simultaneously, reach the strained situation of simultaneously monitoring rock sample in the process of adsorption equilibrium at rock sample, be convenient to analyze the relation between rock mass absorption and rock mass microstress;
The concrete steps of method:
1, source of the gas steel cylinder 1 taps into airshed valve 2 and is connected with adsorption tanks 10, and the vacuum pump 4 airshed valve that runs in is connected with adsorption tanks;
2, adsorption tanks 10 are arranged in constant temperature water bath room 7, ensure the temperature constant in rock sample absorption test process;
3, the pressure transducer 8 external data gather and analysis instrument 9 on adsorption tanks 10 top, gaseous tension in Real-Time Monitoring adsorption tanks 10;
4, survey rock sample side paste laterally with longitudinal strain sheet 11, and access data gather and analysis instrument 9, monitors and records the strain in rock sample thermostatic absorption process;
5, test rock sample when gaseous tension no longer changes in adsorption tanks 10 and reach adsorption equilibrium, adsorption tanks are decomposed from testing table, then with high precision balance, it is weighed;
6, multiple adsorption tanks 10 can be installed in constant temperature water bath room 7 simultaneously, are convenient to do measurement of comparison to the rock sample within the scope of different-grain diameter simultaneously;
7, after reaching adsorption equilibrium in adsorption tanks 10, close charge flow rate valve 2, opening pressure sensor interface and strain line interface, close the closing valve on adsorption tanks top, then adsorption tanks are taken out, with precision balance, whole adsorption tanks are weighed, comprise rock sample quality and gases at high pressure quality, finally can extrapolate the amount of substance of free state gas in adsorption tanks.
Described adsorption tanks 10 top is provided with gas pressure sensor 8, and adsorption tanks internal gas pressure data are transferred to data collection and transmission by pressure transducer 8, when gaseous tension in adsorption tanks 10 arrives set pressure point, closes charge flow rate valve 2.
Further, when data collection and analysis instrument 9 shows that in adsorption tanks, pressure reaches predetermined value, manual-lock charge flow rate valve 2, close draught excluder 5 simultaneously, after this because the suction-operated of coal sample to gas causes pressure in adsorption tanks 10 to reduce gradually, namely on data collection and analysis instrument 9, reading reduces gradually, when pressure reading tends towards stability, can think and reach adsorption equilibrium in adsorption tanks 10;
Constant temperature water bath control system mainly comprises radiator valve 6 and constant temperature water bath room 7; Whole adsorption tanks are in water bath, ensure that Dynamic Adsorption carries out at the same temperature;
The pressure signal that pressure transducer 8 collects by finally demonstrating reading after digital-to-analog conversion on data collection and analysis instrument 9; The strain information that foil gauge 11 gathers is inner by being stored in data collection and analysis instrument 9 after digital-to-analog conversion.
Testing tool comprises: source of the gas steel cylinder 1, charge flow rate valve 2, extraction flow valve 3, vacuum pump 4, radiator valve 6, constant temperature water bath room 7, pressure transducer 8, data collection and analysis instrument 9, adsorption tanks 10 and foil gauge 11; Source of the gas steel cylinder 1 is connected with adsorption tanks 10 by charge flow rate valve 2, and vacuum pump 4 is connected with adsorption tanks 10 by extraction flow valve 3; Adsorption tanks 10 are placed in heat-seal and completely cut off inside cavity, adsorption tanks 10 top is provided with gas pressure sensor 8, gas pressure sensor 8 is connected with data collection and analysis instrument 9, and the foil gauge 11 be attached on rock sample side is connected with data collection and analysis instrument 9 by adsorption tanks 10 top; Radiator valve 6 is connected on constant temperature water bath room.
Described adsorption tanks 10 are provided with strain interfaces of connecting wires, and transverse direction and the longitudinal strain sheet 11 of rock sample side are external to data collection and analysis instrument 9 by connection jaws, and then obtain strain of rock mass data in rock sample adsorption process.
Described adsorption tanks 10 top is provided with gas pressure sensor 8, and adsorption tanks 10 internal gas pressure data are transferred to data collection and transmission by pressure transducer 8, when gaseous tension in adsorption tanks arrives set pressure point, closes charge flow rate valve 2.
When data collection and analysis instrument 9 shows that in adsorption tanks 10, pressure reaches predetermined value, manual-lock charge flow rate valve 2, close draught excluder 5 simultaneously, after this because the suction-operated of coal sample to gas causes pressure in adsorption tanks 10 to reduce gradually, namely on data collection and analysis instrument 9, reading reduces gradually, when pressure reading tends towards stability, can think and reach adsorption equilibrium in adsorption tanks.
Constant temperature water bath control system comprises radiator valve 6 and constant temperature water bath room 7; Whole adsorption tanks are in water bath, ensure that Dynamic Adsorption carries out at the same temperature.
The pressure signal that pressure transducer 8 collects by finally demonstrating reading after digital-to-analog conversion on data collection and analysis instrument 9; The strain information that foil gauge 11 gathers is inner by being stored in data collection and analysis instrument 9 after digital-to-analog conversion.
Embodiment 1: to test coal core thermostatic absorption methane (1 to 4MPa), testing procedure comprises:
1) prepare cylindrical coal core (core diameter is less than adsorption tanks internal diameter, and coal core height is less than adsorption tanks height), coal core is weighed, record coal sample mass M
coal, post horizontal and vertical foil gauge on its surface;
2) the coal core prepared is put into adsorption tanks, and foil gauge is connected with the strain line in tank;
3) seal adsorption tanks, by tank upper interface, adsorption tanks are connected with vacuum pump, it is vacuumized, and the adsorption tanks containing rock core are weighed, recording quality M
coal+cell;
4) adsorption tanks are put into water bath with thermostatic control, arrange bath temperature to the measured value needed, the strain line interface connecting adsorption tanks top is connected with strain data collector;
5) by connecting gas injection device and adsorption tanks, in tank, inject helium, until reach balance, gaseous tension is constant;
6) gaseous tension constant after, recording constant pressure is also weighed again to adsorption tanks;
7) repeat step 5 and 6, to adsorption tanks note helium to different spot pressures, be roughly 0.5,1,2,3,4MPa, weigh respectively at different spot pressures, and recording quality is M respectively
he-0.5, M
he-1, M
he-2, M
he-3, M
he-4.These data will be used to calculate the dead volume size in adsorption tanks, are that free state gas amount provides data for what calculate coal sample adsorption gas;
8), after recording the dead volume size of adsorption tanks, again adsorption tanks are vacuumized;
9) methane gas is by pipeline, and inject adsorption tanks, until reach balance, gaseous tension is constant, is monitored in this process by the strain of strain testing instrument to coal core;
10), after coal sample adsorption equilibrium, after gaseous tension is constant, recording constant pressure is also weighed again to adsorption tanks;
11) repeat step 9 and 10, to adsorption tanks note methane gas to different spot pressures, be roughly 0.5,1,2,3,4MPa, to obtain complete thermostatic absorption curve.Weigh respectively at different spot pressures, and recording quality is M respectively
cH4-0.4, M
cH4-1, M
cH4-2, M
cH4-3, M
cH4-4;
12) by calculating, test result being converted into the methane content of the coal absorption of unit mass, drawing the thermostatic absorption curve of this coal sample, and draw the strain of coal sample in adsorption process.
The computing method of adsorbance:
At each gaseous tension point, the gas gross in adsorption tanks can carry out weighing by high precision balance and obtain, Zong so the amount of substance of the interior gas of tank is exactly:
Wherein n
totalthe amount of substance of total gas in tank, M
totalthe gross mass of gas in tank, M
gasit is the molal weight of test gas.
In dead volume, the amount of substance of gas can be calculated by formula below, needs the real density (the gas real density that formula below calculates for SRK equation) of gas herein:
PV
void＝n
voidZ
SRKRT
Wherein n
voidthe amount of substance of the gas in adsorption tanks dead volume, V
voidbe the actual size of dead volume, be that the method by injecting helium records, P is the pressure of gas in adsorption tanks after adsorption equilibrium, and T is the temperature of constant temperature test, R gas law constant, Z
sRKrefer to the compressibility coefficient (pressure and temperature by specifying is brought gas SRK equation into and tried to achieve) of test gas.By parameter n
totaland n
void, the Gibbs adsorbance (amount of substance) of gas is tried to achieve by formula below:
n
adsorbed＝n
total-n
void
Constant temperature curve is (NTP) normally at normal temperatures and pressures, and the volume of absorption is expressed, so adsorbance is tried to achieve by formula below:
v
adsorbed＝n
adsorbedV
m
Wherein V
adsorbedrefer to the volume of adsorbed gas, V
mrefer to the molar volume of gas under normal temperature and pressure (NTP), at each adsorption site, Gibbs gas absorption amount is by Gibbs adsorbent accumulated amount v
adsorbedtry to achieve divided by rock-mass quality.
The calculating of specific embodiment
General theory thinks that coal sample is non-adsorbable to helium, so the measurement of adsorption tanks dead volume calculates by injecting helium.
Wherein, n
he-0.5, n
he-1, n
he-2, n
he-3, n
he-4for the amount of substance of helium in adsorption tanks under different pressures point, M
hefor the molal weight of helium.
Then the dead volume in adsorption tanks can be tried to achieve according to formula 3-12.
PV
void-0.5＝n
He-0.5Z
SRKRT
After dead volume in adsorption tanks calculates, again can go out the amount of substance of free state gas in adsorption tanks under different pressures point by inverse by formula 3-12.
In like manner can calculate
In adsorption tanks, the total amount of methane is obtained by following formula:
Wherein,
for the molal weight of methane;
In like manner can obtain
Methane content under adsorbed state can be tried to achieve by through type 3-13:
In like manner can obtain
Constant temperature curve is (NTP) normally at normal temperatures and pressures, and the volume of absorption is expressed, so adsorbance needs through type 3-14 to convert usually, that is:
In like manner can obtain
Obtain coal sample after the absolute adsorption amount of different pressures point, also can obtain sub-optimal fusion algorithm, that is:
In like manner can try to achieve coal sample under other spot pressures to the sub-optimal fusion algorithm of methane.
Claims (6)
1. measure the method for testing of rock mass thermostatic absorption and monitoring strain of rock mass for one kind, it is characterized in that: the method for testing of this rock mass constant temperature and strain of rock mass: by the thermostatic absorption ability of indirect gravitational method test rock mass, transverse direction and longitudinal strain sheet can be pasted at surveyed sample side simultaneously, reach the strained situation of simultaneously monitoring rock sample in the process of adsorption equilibrium at rock sample, be convenient to analyze the relation between rock mass absorption and rock mass microstress;
The concrete steps of method:
1) source of the gas steel cylinder 1 taps into airshed valve 2 and is connected with adsorption tanks 10, and the vacuum pump 4 airshed valve that runs in is connected with adsorption tanks;
2) adsorption tanks 10 are arranged in constant temperature water bath room 7, ensure the temperature constant in rock sample absorption test process;
3) the pressure transducer 8 external data gather and analysis instrument on adsorption tanks 10 top, gaseous tension in Real-Time Monitoring adsorption tanks;
4) survey rock sample side paste laterally with longitudinal strain sheet 11, and access data gather and analysis instrument 9, monitors and records the strain in rock sample thermostatic absorption process;
5) test rock sample when gaseous tension no longer changes in adsorption tanks 10 and reach adsorption equilibrium, adsorption tanks 10 are decomposed from testing table, then with high precision balance, it is weighed;
6) multiple adsorption tanks 10 can be installed in constant temperature water bath room 7 simultaneously, are convenient to do measurement of comparison to the rock sample within the scope of different-grain diameter simultaneously;
7) after reaching adsorption equilibrium in adsorption tanks 10, close charge flow rate valve 2, opening pressure sensor 8 interface and strain line interface, close the closing valve on adsorption tanks 10 top, then adsorption tanks are taken out, with precision balance, whole adsorption tanks are weighed, comprise rock sample quality and gases at high pressure quality, finally can extrapolate the amount of substance of free state gas in adsorption tanks.
2. a kind of testing tool measuring rock mass thermostatic absorption and monitoring strain of rock mass according to claim 1, it is characterized in that: described adsorption tanks top is provided with gas pressure sensor, adsorption tanks internal gas pressure data are transferred to data collection and transmission by pressure transducer, when gaseous tension in adsorption tanks arrives set pressure point, close charge flow rate valve.
3. a kind of method of testing measuring rock mass thermostatic absorption and monitoring strain of rock mass according to claim 1, it is characterized in that: when data collection and analysis instrument 9 shows that in adsorption tanks 10, pressure reaches predetermined value, manual-lock charge flow rate valve 2, close draught excluder 5 simultaneously, after this because the suction-operated of coal sample to gas causes pressure in adsorption tanks to reduce gradually, namely on data collection and analysis instrument 9, reading reduces gradually, when pressure reading tends towards stability, can think and reach adsorption equilibrium in adsorption tanks 10;
Constant temperature water bath control system mainly comprises radiator valve 6 and constant temperature water bath room 7; Whole adsorption tanks are in water bath, ensure that Dynamic Adsorption carries out at the same temperature;
The pressure signal that pressure transducer 8 collects by finally demonstrating reading after digital-to-analog conversion on data collection and analysis instrument 9; The strain information of foil gauge collection is inner by being stored in data collection and analysis instrument 9 after digital-to-analog conversion.
4. a kind of testing tool measuring rock mass thermostatic absorption and monitoring strain of rock mass according to claim 1, is characterized in that: testing tool comprises: source of the gas steel cylinder 1, charge flow rate valve 2, extraction flow valve 3, vacuum pump 4, radiator valve 6, constant temperature water bath room 7, pressure transducer 8, data collection and analysis instrument 9, adsorption tanks 10 and foil gauge 11; Source of the gas steel cylinder 1 is connected with adsorption tanks 10 by charge flow rate valve 2, and vacuum pump 4 is connected with adsorption tanks 10 by extraction flow valve 3; Adsorption tanks 10 are placed in heat-seal and completely cut off inside cavity, adsorption tanks 10 top is provided with gas pressure sensor 8, gas pressure sensor 8 is connected with data collection and analysis instrument 9, and the foil gauge 11 be attached on rock sample side is connected with data collection and analysis instrument by adsorption tanks 10 top; Radiator valve 6 is connected on constant temperature water bath room 7.
5. a kind of testing tool measuring rock mass thermostatic absorption and monitoring strain of rock mass according to claim 4, it is characterized in that: described adsorption tanks 10 are provided with strain interfaces of connecting wires, transverse direction and the longitudinal strain sheet 11 of rock sample side are external to data collection and analysis instrument 9 by connection jaws, and then obtain strain of rock mass data in rock sample adsorption process.
6. a kind of testing tool measuring rock mass thermostatic absorption and monitoring strain of rock mass according to claim 4, it is characterized in that: described adsorption tanks 10 top is provided with gas pressure sensor 8, adsorption tanks internal gas pressure data are transferred to data collection and transmission by pressure transducer 8, when gaseous tension in adsorption tanks arrives set pressure point, close charge flow rate valve 2.
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| CN109580805A (en) * | 2018-11-08 | 2019-04-05 | 上海交通大学 | Adsorption equilibrium specificity analysis device and its analysis method |
| CN110487664A (en) * | 2019-07-19 | 2019-11-22 | 中国矿业大学 | Coal-bed gas parameter detection device and construction method based on dead space conversion pressure |
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