CN113049440A - Underground direct determination method for coal seam gas content - Google Patents
Underground direct determination method for coal seam gas content Download PDFInfo
- Publication number
- CN113049440A CN113049440A CN202110314546.4A CN202110314546A CN113049440A CN 113049440 A CN113049440 A CN 113049440A CN 202110314546 A CN202110314546 A CN 202110314546A CN 113049440 A CN113049440 A CN 113049440A
- Authority
- CN
- China
- Prior art keywords
- gas
- desorption
- coal
- drilling
- loss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000003795 desorption Methods 0.000 claims abstract description 78
- 238000005070 sampling Methods 0.000 claims abstract description 47
- 238000005553 drilling Methods 0.000 claims abstract description 46
- 238000009792 diffusion process Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 238000010298 pulverizing process Methods 0.000 claims abstract 2
- 238000012937 correction Methods 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 6
- 230000002547 anomalous effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001684 chronic effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011866 long-term treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A method for directly measuring the gas content in coal bed under the well includes such steps as dividing the gas content in coal bed into drilling loss, sampling loss, underground desorption and pulverizing desorption, calculating the drilling loss by the relation between gas flow rate and drilling time in drilling stage, calculating the sampling loss by fractional-order abnormal diffusion model by the relation between underground desorption and underground desorption time, and correcting the gas content in each stage to standard state. Compared with the traditional gas content measuring method, the method increases the dynamic gas loss calculation in the drilling process, the fractional order abnormal diffusion model can estimate the sampling loss more accurately, the defect that the content value of coal bed gas (coal bed gas) measured by the traditional method is smaller is overcome, and the method meets the requirement of a coal mine on accurate measurement of the gas content parameter.
Description
Technical Field
The invention relates to a method for measuring gas content, in particular to a method for directly measuring the gas content of a coal bed underground, and belongs to the technical field of coal mine gas (coal bed methane) parameter measurement.
Background
Coal bed gas is commonly called mine gas, is a disastrous gas of a coal mine, and is a non-renewable unconventional clean energy source. The content of gas (coal bed gas) is a key basic parameter for coal bed gas exploration and development and mine gas disaster prevention and control. At present, China adopts a direct method to measure the content of coal bed gas (coal bed gas), and the national standards of a coal bed gas content underground direct measurement method (GB/T23250 + 2009) and a GB/T19559 + 2008 coal bed gas content measurement method are formulated. In a published patent document, for example, a method for directly and quickly determining the gas content of a coal seam under a coal mine with the publication number of CN102128765A disclosed in Chinese patent invention 2011, 7, 20, the gas content of the coal seam is divided into two parts of desorption gas content and residual gas content, and for example, a method for directly fitting and determining the gas content of the coal seam with the publication number of CN105865970A disclosed in Chinese patent invention 2016, 8, 17, a general expression of a coal sample gas desorption rule is established to further calculate the natural desorption gas content under the coal mine; however, in engineering application, the direct method can underestimate the coal bed gas (coal bed gas) content, and the main reasons are that the gas loss in the drilling process is not considered and the gas loss in the sampling process cannot be accurately calculated (zilliming, old study, chen wuyi, shang right. novel accurate determination method for coal bed gas content researches [ J ] mining and safety engineering report, 2010,27(01): 111-115.).
Disclosure of Invention
The invention aims to provide a method for directly measuring the coal bed gas content underground, which can solve the problem that the content of the coal bed gas (coal bed gas) is low in the measuring process and improve the accuracy of the measurement of the coal bed gas (coal bed gas) content.
In order to achieve the aim, the invention provides a method for directly measuring the coal bed gas content underground, which divides the gas (coal bed gas) content into four parts, namely drilling loss, sampling loss, underground desorption and crushing desorption, and comprises the following specific measurement steps:
drilling: drilling from underground coal wall to position of point to be sampledWhile recording the drilling time t1And orifice flow rate Q during drilling, using drilling time t1And the loss V of the drilling stage is calculated by the law between the flow Q of the orifice1；
A sampling stage: discharging the coal sample drilled from the point to be sampled to the drill hole by using a drill rod, receiving a certain mass of coal sample at the drill hole, screening the coal sample to a specified mesh number, immediately weighing the coal sample, filling the coal sample into a sealed tank, and recording the sampling time t2And the mass m of the coal sample;
③ desorbing in the well: setting the time length of underground desorption as t3Measuring the desorption amount of the coal sample in the period by using a gas desorption instrument, continuously recording different desorption moments t and corresponding gas desorption amounts V during the period, and finally measuring the underground desorption amount V3By utilizing the dynamic relation between the gas desorption amount V and different desorption moments t and combining the sampling time t2Obtaining the gas loss V in the sampling stage by reverse calculation2；
Crushing desorption stage: breaking the coal sample in the sealed tank to a specified mesh number in a sealed state, continuously measuring the desorption amount to a certain set time by using a gas desorption instrument, and simultaneously recording the crushing desorption amount V4；
Recording the atmospheric pressure and the ambient temperature of a measurement place, and correcting the gas quantity of each stage to the volume under the standard condition;
and sixthly, calculating the content of coal bed gas (coal bed gas).
Calculating the loss V of drilling stage in the step I of the invention1Is based on the orifice flow rate Q and the drilling time t during drilling1The change rule is inversely calculated, and the model is as follows:
in the formula: r1Is the borehole radius;
lambda is the permeability coefficient of the coal bed;
p is the coal bed gas pressure;
chi is a gas content coefficient;
r is the distance from the drill hole loosening ring to the center of the drill hole;
h is the thickness of the coal bed;
d is a gas diffusion coefficient;
r0is the coal particle radius.
Step three of the invention is that the gas loss V is obtained in the sampling stage2The method is calculated according to a fractional order anomalous diffusion model, wherein the model comprises the following steps:
in the formula: v is the gas desorption amount corresponding to different underground desorption moments t;
V2at a sampling time t2The loss amount of the gas in the gas tank;
a is a model parameter;
Dfis a fractional order diffusion coefficient;
alpha and beta are fractional order parameters.
In the fifth step of the invention, the gas amount of each stage is corrected to the volume under the standard condition, and the calculation formula is as follows:
in the formula: v'iThe gas quantity of each stage after correction;
Vithe gas quantity of each stage before the correction is not carried out;
P1atmospheric pressure at the downhole sampling site;
P0is standard atmospheric pressure;
t ambient temperature at the down-hole sampling site.
In the step of the invention, the coal bed gas (coal bed gas) content is calculated according to the following formula:
in the formula: w is the coal seam gas content;
V′1the corrected gas loss amount in the drilling stage;
V′2the gas loss amount in the sampling stage after correction;
V′3is the corrected downhole desorption amount;
V′4the corrected crushing desorption amount;
and m is the mass of the coal sample.
The crushing in the step (IV) of the invention is to obtain the specified mesh number of not less than 80 meshes.
The screening in the second step of the invention is carried out until the specified mesh number is 20-40 meshes.
Downhole desorption time t required by inversion model of the invention3Is 5-20 min; the sampling time t in the step II2Is 0-30 min.
The mass m of the coal sample in the step II of the invention is 200-1000 g.
Compared with the prior art, the method divides the gas (coal bed gas) content into four parts of drilling loss, sampling loss, underground desorption and crushing desorption, considers the dynamic loss of the coal bed gas in the drilling process, and counts the gas loss in the drilling process into the coal bed gas content; meanwhile, the fractional order anomalous diffusion model is used for carrying out inversion on the gas loss amount in the sampling process, so that the accuracy of gas content measurement is improved; the sampling allowable time is widened from within 5min limited by the existing method to within 30min, so that the method is more suitable for the complex measurement environment of the underground coal mine site, and has feasibility and progress.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 shows an example of the present invention in which a certain mine 3 is grown#A relation graph of the orifice flow of a coal bed return air crossheading No. 1 measuring point and the drilling time;
FIG. 3 shows an example of the present invention in which a certain mine 3 is grown#A relation graph of underground desorption quantity and underground desorption time of a coal bed return air crossheading No. 1 measuring point;
FIG. 4 shows an embodiment of the present invention for treating chronic hepatitisMine 3#And (3) inverting a sampling loss calculation graph by using the fractional order abnormal diffusion model at the No. 1 measuring point of the return air crossheading of the coal seam.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, a method for directly measuring the gas content of a coal seam under a well comprises the steps of dividing the gas (coal seam gas) content into four parts, namely drilling loss, sampling loss, underground desorption and crushing desorption, collecting basic geological data of a certain mine and a certain working surface in advance before measuring the gas content of the working surface of the mine, collecting a coal sample after determining a sampling point position, bringing the coal sample to a laboratory, and measuring basic parameters and model parameters of the coal sample according to related test standards;
the specific determination steps are as follows:
drilling: when in measurement, firstly, the coal wall is drilled to the position of a point to be sampled from the underground, the drill rod is not limited to a threaded drill rod, and meanwhile, the drilling time t is recorded1And orifice flow rate Q during drilling, using drilling time t1And the loss V of the drilling stage is calculated by the law between the flow Q of the orifice1；
A sampling stage: discharging the coal sample drilled from the point to be sampled to the drill hole by using a drill rod, receiving a certain mass of coal sample at the drill hole, screening the coal sample to a specified mesh number, immediately weighing the coal sample, filling the coal sample into a sealed tank, and recording the sampling time t2And the mass m of the coal sample;
③ desorbing in the well: setting the time length of underground desorption as t3Measuring the desorption amount of the coal sample in the period by using a gas desorption instrument, continuously recording different desorption moments t and corresponding gas desorption amounts V during the period, and finally measuring the underground desorption amount V3By utilizing the dynamic relation between the gas desorption amount V and different desorption moments t and combining the sampling time t2Obtaining the gas loss V in the sampling stage by reverse calculation2；
Crushing desorption stage: breaking the coal sample in the sealed tank to a specified mesh number in a sealed state, continuously measuring the desorption amount to a certain set time by using a gas desorption instrument, and simultaneously recording the crushing desorption amount V4；
Recording the atmospheric pressure and the ambient temperature of a measurement place, and correcting the gas quantity of each stage to the volume under the standard condition;
and sixthly, calculating the content of coal bed gas (coal bed gas).
Calculating the loss V of the drilling stage in the step I1Is based on the orifice flow rate Q and the drilling time t during drilling1The change rule is inversely calculated, and the model is as follows:
in the formula: r1Is the borehole radius;
lambda is the permeability coefficient of the coal bed;
p is the coal bed gas pressure;
chi is a gas content coefficient;
r is the distance from the drill hole loosening ring to the center of the drill hole;
h is the thickness of the coal bed;
d is a gas diffusion coefficient;
r0is the coal particle radius.
Step III, gas loss V in sampling stage2The method is calculated according to a fractional order anomalous diffusion model, wherein the model comprises the following steps:
in the formula: v is the gas desorption amount corresponding to different underground desorption moments t;
V2at a sampling time t2The loss amount of the gas in the gas tank;
a is a model parameter;
Dfis a fractional order diffusion coefficient;
alpha and beta are fractional order parameters;
wherein the absolute value of the intersection point of the curve and the vertical axis is the gas loss V in the sampling stage2The value of (c).
In the fifth step, the gas amount of each stage is corrected to the volume under the standard condition, and the calculation formula is as follows:
in the formula: v'iThe gas quantity of each stage after correction;
Vithe gas quantity of each stage before the correction is not carried out;
P1atmospheric pressure at the downhole sampling site;
P0is standard atmospheric pressure;
t ambient temperature at the down-hole sampling site.
The coal bed gas (coal bed gas) content is calculated according to the following formula:
in the formula: w is the coal seam gas content;
V′1the corrected gas loss amount in the drilling stage;
V′2the gas loss amount in the sampling stage after correction;
V′3is the corrected downhole desorption amount;
V′4the corrected crushing desorption amount;
and m is the mass of the coal sample.
One embodiment of the present invention is given
Below, to grow and treat a certain ore 3#Taking a measuring point No. 1 of a coal bed return air crossheading as an example, the method comprises the following specific steps:
firstly, determining a long-term cure mineral 3#Before the gas content of a measuring point No. 1 of the return air crossheading of the coal bed, the depth of a sampling point is determined to be 15m in front of a coal wall, basic geological data of the position is collected in advance, sufficient coal samples are collected and brought to a laboratory, and basic parameters of the coal samples and calculation parameters of models are measured according to relevant test standards and are shown in table 1.
TABLE 1 Long term treatment of a mineral 3#Coal bed return air crossheading No. 1 measuring point calculation parameter value
Drilling from the underground coal wall to the position of the point to be sampled by using a spiral drill rod, and simultaneously recording the drilling time t1And the orifice flow Q during drilling (see fig. 2), the drilling stage loss V is back-calculated using equation (1)10.36L;
thirdly, discharging the coal sample drilled from the point to be sampled to a drill hole by using a drill rod, receiving some coal sample at the drill hole, screening to 20-40 meshes, immediately weighing, loading into a sealed tank, and simultaneously recording the sampling time t2Is 5min and the mass m of the coal sample is 450 g;
fourthly, using a gas desorption instrument to measure the desorption amount of the coal sample until the set underground desorption time is 20min, continuously recording different desorption moments t and corresponding gas desorption amounts V (shown in figure 3) in the period, and finally measuring the underground desorption amount V3Is 1.15L, and then utilizes the dynamic relation between the gas desorption quantity V and different desorption moments t and combines t2And the loss V of the sampling stage is inversely calculated by using the formula (2)2The inverse calculation process is shown in FIG. 4, where the absolute value of the intersection of the fitted curve and the vertical axis is V2The loss amount V of the sampling stage is calculated2Is 1.18L;
fifthly, continuously crushing the coal sample in the sealed tank to 80 meshes in a sealed state, then continuously measuring the desorption amount for 30min by using a gas desorption instrument, and simultaneously recording the crushing desorption amount V4Is 1.63L;
sixthly, recording the atmospheric pressure P of the measuring place1At 101KPa, the ambient temperature T at the downhole sampling site is 28 ℃, and the gas volume at each stage is corrected to a standard condition volume, V 'after correction, according to equation (3)'1Is 0.347L, V'2Is 1.107L, V'3Is 1.136L, V'4Is 1.57L;
seventhly, the coal bed gas content is calculated according to the formula (4)
Claims (9)
1. The method for directly measuring the gas content of the coal bed underground is characterized in that the gas content is divided into four parts, namely drilling loss, sampling loss, underground desorption and crushing desorption, and the method comprises the following specific measurement steps:
drilling: drilling from underground coal wall to position of point to be sampled, and recording drilling time t1And orifice flow rate Q during drilling, using drilling time t1And the loss V of the drilling stage is calculated by the law between the flow Q of the orifice1；
A sampling stage: discharging the coal sample drilled from the point to be sampled to the drill hole by using a drill rod, receiving a certain mass of coal sample at the drill hole, screening the coal sample to a specified mesh number, immediately weighing the coal sample, filling the coal sample into a sealed tank, and recording the sampling time t2And the mass m of the coal sample;
③ desorbing in the well: setting the time length of underground desorption as t3Measuring the desorption amount of the coal sample in the period by using a gas desorption instrument, continuously recording different desorption moments t and corresponding gas desorption amounts V during the period, and finally measuring the underground desorption amount V3By utilizing the dynamic relation between the gas desorption amount V and different desorption moments t and combining the sampling time t2Obtaining the gas loss V in the sampling stage by reverse calculation2；
Crushing desorption stage: breaking the coal sample in the sealed tank to a specified mesh number in a sealed state, continuously measuring the desorption amount to a certain set time by using a gas desorption instrument, and simultaneously recording the crushing desorption amount V4；
Recording the atmospheric pressure and the ambient temperature of a measurement place, and correcting the gas quantity of each stage to the volume under the standard condition;
and sixthly, calculating the coal bed gas content.
2. The method for directly measuring coal seam gas content in the well according to claim 1, wherein the loss V of the drilling stage is calculated in the step (i)1Is based on the orifice flow rate Q and the drilling time t during drilling1The change rule is inversely calculated, and the model is as follows:
in the formula: r1Is the borehole radius;
lambda is the permeability coefficient of the coal bed;
p is the coal bed gas pressure;
chi is a gas content coefficient;
r is the distance from the drill hole loosening ring to the center of the drill hole;
h is the thickness of the coal bed;
d is a gas diffusion coefficient;
r0is the coal particle radius.
3. The method for directly measuring the gas content in the coal seam under the well according to the claim 1 or 2, characterized in that the gas loss V in the sampling stage is obtained2The method is calculated according to a fractional order anomalous diffusion model, wherein the model comprises the following steps:
in the formula: v is the gas desorption amount corresponding to different underground desorption moments t;
V2at a sampling time t2The loss amount of the gas in the gas tank;
a is a model parameter;
Dfis a fractional order diffusion coefficient;
alpha and beta are fractional order parameters.
4. The method for directly measuring the gas content in the coal seam under the well according to the claim 1 or 2, characterized in that in the fifth step, the gas amount in each stage is corrected to the volume under the standard condition, and the calculation formula is as follows:
in the formula: vi' is the gas quantity of each stage after correction;
Vithe gas quantity of each stage before the correction is not carried out;
P1atmospheric pressure at the downhole sampling site;
P0is standard atmospheric pressure;
t ambient temperature at the down-hole sampling site.
5. The method for directly measuring the coal bed gas content under the well according to claim 3, wherein the coal bed gas content in the step (sixth) is calculated according to the following formula:
in the formula: w is the coal seam gas content;
V1' is the corrected gas loss amount in the drilling stage;
V2' is the gas loss amount in the sampling stage after correction;
V3' is corrected downhole desorption;
V4' is the corrected pulverization desorption amount;
and m is the mass of the coal sample.
6. The method for directly measuring the gas content in the coal seam under the well according to the claim 5, characterized in that the crushing in the step (iv) is carried out to a specified mesh number of not less than 80 meshes.
7. The method for directly measuring the gas content in the coal seam under the well according to claim 5, wherein the screening in the step (II) is carried out until the specified mesh number is 20-40 meshes.
8. The method for directly measuring coal bed gas content in the well according to claim 5, wherein the underground desorption time t required by the inversion model is3Is 5-20 min; the sampling time t in the step II2Is 0-30 min.
9. The method as claimed in claim 5, wherein the mass m of the coal sample in step (II) is 200-1000 g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314546.4A CN113049440B (en) | 2021-03-24 | 2021-03-24 | Underground direct determination method for coal seam gas content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314546.4A CN113049440B (en) | 2021-03-24 | 2021-03-24 | Underground direct determination method for coal seam gas content |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113049440A true CN113049440A (en) | 2021-06-29 |
| CN113049440B CN113049440B (en) | 2022-03-25 |
Family
ID=76514966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110314546.4A Active CN113049440B (en) | 2021-03-24 | 2021-03-24 | Underground direct determination method for coal seam gas content |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113049440B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198139A (en) * | 2021-12-28 | 2022-03-18 | 山西晋煤集团技术研究院有限责任公司 | Method for measuring gas loss of coal sample to be sampled at bottom of coal mine drill hole |
| CN114371096A (en) * | 2022-01-12 | 2022-04-19 | 平安煤炭开采工程技术研究院有限责任公司 | Method and device for rapidly measuring residual gas content of underground coal sample |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135621A (en) * | 2006-08-30 | 2008-03-05 | 煤炭科学研究总院重庆分院 | Direct rapid measuring method capable of desorbing mash gas content with coal seam |
| CN102928560A (en) * | 2012-11-01 | 2013-02-13 | 中国矿业大学 | Method for directly determining coal seam gas content by using downward drilling hole of gas extraction pipe |
| CN103983534A (en) * | 2014-05-26 | 2014-08-13 | 河南理工大学 | Gas loss calculation method |
| CN105865970A (en) * | 2016-03-28 | 2016-08-17 | 山东科技大学 | Direct fitting determination method of gas content of coal seam |
| CN106680451A (en) * | 2015-11-09 | 2017-05-17 | 河南理工大学 | Underground rapid measurement method for coal and gas outburst parameter as well as apparatus thereof |
| CN108896438A (en) * | 2018-07-25 | 2018-11-27 | 重庆大学 | Bottom hole gas bearing capacity measuring device and measurement method |
| CN109142669A (en) * | 2018-09-27 | 2019-01-04 | 西安科技大学 | One kind being based on the relevant coal-bed gas parameter rapid assay methods of data |
| CN111982567A (en) * | 2020-08-17 | 2020-11-24 | 中煤科工集团重庆研究院有限公司 | Construction method of gas loss compensation model in deep hole reverse circulation sampling process |
-
2021
- 2021-03-24 CN CN202110314546.4A patent/CN113049440B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135621A (en) * | 2006-08-30 | 2008-03-05 | 煤炭科学研究总院重庆分院 | Direct rapid measuring method capable of desorbing mash gas content with coal seam |
| CN102928560A (en) * | 2012-11-01 | 2013-02-13 | 中国矿业大学 | Method for directly determining coal seam gas content by using downward drilling hole of gas extraction pipe |
| CN103983534A (en) * | 2014-05-26 | 2014-08-13 | 河南理工大学 | Gas loss calculation method |
| CN106680451A (en) * | 2015-11-09 | 2017-05-17 | 河南理工大学 | Underground rapid measurement method for coal and gas outburst parameter as well as apparatus thereof |
| CN105865970A (en) * | 2016-03-28 | 2016-08-17 | 山东科技大学 | Direct fitting determination method of gas content of coal seam |
| CN108896438A (en) * | 2018-07-25 | 2018-11-27 | 重庆大学 | Bottom hole gas bearing capacity measuring device and measurement method |
| CN109142669A (en) * | 2018-09-27 | 2019-01-04 | 西安科技大学 | One kind being based on the relevant coal-bed gas parameter rapid assay methods of data |
| CN111982567A (en) * | 2020-08-17 | 2020-11-24 | 中煤科工集团重庆研究院有限公司 | Construction method of gas loss compensation model in deep hole reverse circulation sampling process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198139A (en) * | 2021-12-28 | 2022-03-18 | 山西晋煤集团技术研究院有限责任公司 | Method for measuring gas loss of coal sample to be sampled at bottom of coal mine drill hole |
| CN114198139B (en) * | 2021-12-28 | 2024-06-11 | 山西晋煤集团技术研究院有限责任公司 | Method for measuring gas loss of coal sample to be taken at bottom of coal mine drilling hole |
| CN114371096A (en) * | 2022-01-12 | 2022-04-19 | 平安煤炭开采工程技术研究院有限责任公司 | Method and device for rapidly measuring residual gas content of underground coal sample |
| CN114371096B (en) * | 2022-01-12 | 2023-10-10 | 平安煤炭开采工程技术研究院有限责任公司 | Method and device for rapidly determining residual gas content of underground coal sample |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113049440B (en) | 2022-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113049440B (en) | Underground direct determination method for coal seam gas content | |
| CN106442938B (en) | A kind of accurate survey calculation method for obtaining shale air content | |
| CN104500049A (en) | Shale gas physical geography quick evaluation method | |
| CN106680451A (en) | Underground rapid measurement method for coal and gas outburst parameter as well as apparatus thereof | |
| CN107907910B (en) | Different lithologic reservoir transverse wave well logging determination method | |
| CN108169062A (en) | Simulate the visual test device and method of subterranean coal gas preservation desorption process | |
| CN111797546B (en) | Shale oil and gas reservoir mineral component model optimization inversion method | |
| Guo et al. | Physical simulation and compatibility evaluation of multi-seam CBM co-production: Implications for the development of stacked CBM systems | |
| CN205538580U (en) | Indoor survey device of fissuted medium system infiltration tensor | |
| Xu et al. | A new approach to estimating coal gas content for deep core sample | |
| Wang et al. | Evaluation of lost gas in the borehole drilling stage: Implication for the direct method of coalbed methane content determination | |
| Yanfang et al. | Quantitative evaluation of lateral sealing of extensional fault by an integral mathematical-geological model | |
| CN108661632B (en) | High-precision carbon-oxygen ratio logging method | |
| Zhang et al. | Experimental research on permeability variation from the process of hydraulic fracturing of high-rank coal | |
| CN109958434B (en) | Drilling hydrogeological test method for drilling hole under constant pressure and unsteady flow | |
| Yang et al. | The stress sensitivity of coal bed methane wells and impact on production | |
| Yan et al. | Direct fitting measurement of gas content in coalbed and selection of reasonable sampling time | |
| CN113032942B (en) | Loss gas amount calculating method based on gas anomalous diffusion model | |
| Plaksin et al. | Framework for innovative determination of natural gas content in coal seams | |
| CN115961916A (en) | Hydraulic composite guiding permeability-increasing method for coal mine underground coal seam | |
| CN102383787B (en) | Method for improving target entering success rate of horizontal well | |
| Wen et al. | The use of Hoek Brown failure criterion on determination of the geo-mechanical parameters of a grouting consolidation body | |
| CN112282717B (en) | Fracturing fracture detection and evaluation method suitable for shale gas reservoir hydraulic fracturing | |
| Hu et al. | An experimental study on the interaction law of the pore gas pressure and stress in gassy coals | |
| Zhang et al. | Recapitulation and prospect of research on flow field in coal mine gob |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhou Fubao Inventor after: Kang Jianhong Inventor after: Wang Youpai Inventor after: Liu Yingke Inventor after: Wei Mingyao Inventor before: Kang Jianhong Inventor before: Wang Youpai Inventor before: Liu Yingke Inventor before: Wei Mingyao |