WO2019223316A1 - 用于确定注水煤层裂隙内部水压力的测试装置及测试方法 - Google Patents
用于确定注水煤层裂隙内部水压力的测试装置及测试方法 Download PDFInfo
- Publication number
- WO2019223316A1 WO2019223316A1 PCT/CN2018/125191 CN2018125191W WO2019223316A1 WO 2019223316 A1 WO2019223316 A1 WO 2019223316A1 CN 2018125191 W CN2018125191 W CN 2018125191W WO 2019223316 A1 WO2019223316 A1 WO 2019223316A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- coal seam
- pressure
- test
- water pressure
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
Definitions
- the present invention relates to the technical field of pore water pressure testing, and in particular, to a testing device and a testing method for determining water pressure in a fractured structure of a coal body around a water injection borehole of a coal seam.
- Coal seam water injection is a commonly used comprehensive mine disaster prevention and control technology in the world. After decades of practice and development, so far, nearly 80% of fully mechanized coal mining faces in China have adopted coal seam water injection technology. In recent years, with the continuous progress of this technology and process, the application field of coal seam water injection technology is also expanding. From the beginning of dust reduction, prevention of impact ground pressure, coal and gas outburst, etc., to the present development it can eliminate coal seams. Toxic gases such as hydrogen sulfide are also widely used in the fields of softening hard roofs and mining of top coal.
- a method for measuring fluid pressure in a coal body around a water injection borehole is as follows: a construction borehole, a pressure-measuring pipeline, a hole, an orifice, and a pressure gauge and a reading are installed, and the pressure gauge displays in this method
- the pressure is the combined pressure of gas and water, and the pressure of water cannot be accurately measured.
- the present invention proposes a test device and a test method for determining the water pressure inside the fracture of a water-injected coal seam, which can obtain the diameter of the water inlet hole of the test part through field tests Taking this pore diameter as the intermediate quantity, according to the relationship between the capillary pore diameter and the water pressure in the washbum equation, The relationship can calculate the water pressure in the fractured structure of the coal body around the water injection hole in the coal seam.
- One of the tasks of the present invention is to provide a test device for determining the water pressure inside a fracture of a water-injected coal seam.
- the technical solution includes:
- a test device for determining the water pressure inside a fracture of a water-injected coal seam includes a test mechanism and a display mechanism.
- the test mechanism includes a housing, a water filter film, a water-permeable steel mesh, a water-absorbing swelling rubber, and a positive electrode connector.
- a negative electrode connection head and an explosion-proof power supply the shell is cylindrical, a plurality of water inlet holes with different apertures are provided on the shell, and a plurality of partitions are provided in a cylindrical cavity inside the shell A plurality of partitions divides the cylindrical cavity into a plurality of sealed cavities, and a water-resistant rubber tube is arranged at the center of the cylindrical cavity, and the water-resistant rubber tube is used for placing the Lines connected to explosion-proof power;
- the water-swellable rubber is correspondingly placed in the sealed cavity, and the water-permeable steel mesh and a water filter film are sequentially arranged between the water-swellable rubber and the casing, and the water filter film is used for water
- the impurities contained are isolated, and when the water-absorbing swelling rubber absorbs water for an expansion reaction, the water-permeable steel mesh is used to protect the water filtering membrane and make the water-absorbing swelling rubber move to one side;
- the display mechanism includes an external wire, an indicator light, and a switch, and the external wire is connected to a line connected to the explosion-proof power supply;
- a wire is provided inside the water-swellable rubber, and a positive terminal is provided at one end thereof.
- a certain expansion space is left between the water-swellable rubber and the sealed cavity, and the expansion space is adjacent to each other.
- the explosion-proof power supply is provided at the place, and the negative electrode connector is located at the explosion-proof power supply.
- the positive electrode connector is connected to the negative electrode connector, so that the explosion-proof power supply and the display mechanism are connected at this time.
- a closed circuit of current is formed and displayed by the indicator light of the display mechanism.
- the partition is welded in the cylindrical cavity.
- the water filtration membrane is a RO membrane.
- Another task of the present invention is to provide a test method for determining water pressure inside a fracture of a water-injected coal seam, which adopts the test device described above, and the test method includes the following steps:
- test mechanism Before performing coal seam water injection operation, connect the test mechanism to the display mechanism to determine that each sealed cavity is in contact with The connection order of the indicator lights and the reliability of the circuit are verified. After the verification is completed, the test mechanism is pushed into the bottom of the test borehole and the sealing operation is performed;
- the water inlets with different pore diameters represent capillaries of different sizes.
- low-pressure water can enter the low-pressure sealed cavity through large holes, and high-pressure water can pass through small holes.
- the hole enters the high-pressure sealed cavity.
- indicator light of the display mechanism After a certain indicator light is bright, determine the relevant parameters, and calculate the water pressure by using the size of the water inlet hole of the sealed cavity according to the washbum equation shown in formula (1).
- the water pressure when two phases of gas and water exist in the fracture of the coal seam, the water pressure can be overcome after the water pressure reaches a certain value.
- a water pressure test device is designed.
- the gas pressure can be overcome to enter a smaller one.
- external water inlet holes with different pore diameters representing capillary tubes of different sizes are provided on the casing of the test mechanism, so that low-pressure water can enter the low-pressure sealed cavity inside the test device through the large hole, and high-pressure water can enter through the smaller hole.
- the R.0 film only allows water molecules to pass through, it can isolate impurities such as sediment and sand in the water.
- the water-absorbing expansion rubber will expand under the action of water.
- the water-absorbable and expandable rubber in the sealed cavity can only move to the side of the device.
- the positive and negative power sources in the sealed cavity are connected to electricity.
- the head is connected, so that the internal explosion-proof power supply and the external display mechanism form a current closed loop, so that the external display machine
- the chamber should be sealed for indicator lights. Then, based on the relationship between the capillary pore size and water pressure in the washbum equation, the water pressure in the fracture structure of the coal body around the water injection hole in the coal seam can be calculated.
- the use of the device of the present invention can accurately and quantitatively calculate the water pressure inside the coal body around the borehole during the coal seam injection process, and the calculation result has an important effect on adjusting the coal seam injection parameters and improving the comprehensive disaster prevention effect of the coal seam injection.
- FIG. 1 is a schematic structural diagram of a testing mechanism in the present invention
- FIG. 2 is a schematic cross-sectional view of a test mechanism in the present invention
- FIG. 3 is a schematic structural diagram of a display mechanism in the present invention.
- the present invention proposes a test device and a test method for determining the water pressure inside a fracture of a water-injected coal seam,
- the present invention is described in detail below with reference to specific embodiments.
- a test device for determining water pressure inside a fracture of a water injection coal seam includes a test mechanism and a display mechanism, and the test mechanism includes a casing 1, a larger water inlet hole 2, and R.0 Water filter membrane 3, Permeable steel mesh 4, Water-absorbing swelling rubber 5, Positive electrical connector 6, Negative electrical connector 7, Small water inlet hole 8, Wire 9, Sealed cavity 10, Explosion-proof power supply 11, Power supply cavity 12, Isolation
- the water rubber tube 13 and the partition plate 14, the shell 1 has a cylindrical shape, and a plurality of water inlet holes with different apertures are provided on the housing, that is, the larger water inlet hole 2 and the smaller water inlet hole 8, which are cylindrical inside the housing.
- a plurality of baffles 14 are provided in the cavity, and the plurality of baffles 14 divides the cylindrical cavity into a plurality of sealed cavities 10.
- a water-proof rubber tube 13 is provided at the center of the cylindrical cavity. Place wiring connected to explosion-proof power.
- the display mechanism includes an indicator light 15, an external lead 16 and a switch 17.
- a plurality of indicator lights 15 are provided, and different sealed chambers are connected correspondingly during the test.
- the shell 1 is made of high-strength steel pipes.
- Several water inlet holes with different pore diameters represent capillary tubes of different sizes.
- the gas pressure can be overcome only after the water pressure reaches a certain level. Enter the smaller capillary structure, so low pressure water can enter the low pressure sealed cavity through the larger water inlet hole 2, so that the high pressure water enters the high pressure sealed cavity through the smaller water inlet hole 8, and the sealed cavity is hollowed by the separator 14 in a cylindrical shape.
- the cavity is welded and isolated, and R.0 water filter membrane 3 and permeable steel mesh 4, R.0 water filter membrane are set outside the sealed cavity to allow only water molecules to pass through, which can isolate impurities such as sediment and water in the water
- the steel mesh has a certain strength, which can protect the R.0 film and prevent the water inlet hole from being blocked during the expansion reaction of the water-swellable rubber, and ensure that the water-swellable rubber 5 in the sealed cavity can only move to the side of the device. With high elasticity and good mechanical strength, the rubber can expand several times to hundreds of times after absorbing water.
- a wire is set inside the water absorbing expansion rubber, and a power supply is provided at one end.
- the positive and negative poles of the power supply in the sealed cavity are connected, so that the internal explosion-proof power supply and the external display mechanism form a current closed loop, so that the external display mechanism corresponds to the indication of the sealed cavity.
- the light turns on.
- a test method for determining water pressure inside a fracture of a water-injected coal seam which adopts the above-mentioned test device and includes the following steps: [0033] a According to the coal seam water injection operation plan, design the number of sealed cavities and the corresponding water inlet hole size and process it, and then after the coal seam water injection hole drilling is completed, construct several water pressure test holes around the water injection hole; 0034] b. Before the coal seam water injection operation, connect the test mechanism to the display mechanism, determine the connection order of each sealed cavity and the indicator light, and verify the reliability of the circuit. After the verification is completed, use a drill rod to push the test mechanism into the test drill. Bottom of the hole, and perform sealing operation;
- the water inlets with different pore sizes represent capillary tubes of different sizes.
- low-pressure water can enter the low-pressure sealed cavity through the larger hole, allowing high-pressure water to pass through.
- the smaller hole enters the high-pressure sealed cavity; observe the indicator light of the display mechanism, after a certain indicator light is bright, and after measuring the relevant parameters, use the size of the water inlet hole of the sealed cavity to calculate the water pressure according to the washbum equation shown in equation (1) ;
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Examining Or Testing Airtightness (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2018424685A AU2018424685B2 (en) | 2018-05-23 | 2018-12-29 | Testing device used for determining water pressure in fracture of water injected coal seam and testing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810498213.X | 2018-05-23 | ||
CN201810498213.XA CN108955989B (zh) | 2018-05-23 | 2018-05-23 | 用于确定注水煤层裂隙内部水压力的测试装置及测试方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019223316A1 true WO2019223316A1 (zh) | 2019-11-28 |
Family
ID=64499377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2018/125191 WO2019223316A1 (zh) | 2018-05-23 | 2018-12-29 | 用于确定注水煤层裂隙内部水压力的测试装置及测试方法 |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN108955989B (zh) |
AU (1) | AU2018424685B2 (zh) |
WO (1) | WO2019223316A1 (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111963155A (zh) * | 2020-08-19 | 2020-11-20 | 山东科技大学 | 一种煤层注水润湿范围检测装置、检测方法及均化方法 |
CN113155200A (zh) * | 2021-05-16 | 2021-07-23 | 天地科技股份有限公司 | 一种煤矿地下水库煤柱坝体损伤破坏测定装置与方法 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108955989B (zh) * | 2018-05-23 | 2019-07-05 | 山东科技大学 | 用于确定注水煤层裂隙内部水压力的测试装置及测试方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000065659A (ja) * | 1998-08-17 | 2000-03-03 | Dia Consultant:Kk | 間隙水計測装置 |
CN202693190U (zh) * | 2012-06-14 | 2013-01-23 | 中国水电顾问集团华东勘测设计研究院 | 一种手持便携式岩溶裂隙水压力测量仪 |
CN105190366A (zh) * | 2013-03-08 | 2015-12-23 | 沙特阿拉伯石油公司 | 使用饱和度及核磁共振测井数据确定地表下地层的连续毛细管压力曲线 |
CN105486353A (zh) * | 2016-01-19 | 2016-04-13 | 山东科技大学 | 一种岩体裂隙水综合信息传感器及使用方法 |
CN206338091U (zh) * | 2016-11-30 | 2017-07-18 | 中国石油天然气集团公司 | 一种超高深围岩裂隙水自动监测装置 |
CN206458505U (zh) * | 2016-11-30 | 2017-09-01 | 中国石油天然气集团公司 | 一种测量围岩裂隙水压力的压力计孔 |
CN108955989A (zh) * | 2018-05-23 | 2018-12-07 | 山东科技大学 | 用于确定注水煤层裂隙内部水压力的测试装置及测试方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6662818B2 (en) * | 2002-02-01 | 2003-12-16 | Perseptive Biosystems, Inc. | Programmable tracking pressure regulator for control of higher pressures in microfluidic circuits |
CN201687507U (zh) * | 2010-06-11 | 2010-12-29 | 河南理工大学 | 水压式煤壁注水封孔器 |
CN102287163B (zh) * | 2011-09-08 | 2013-09-11 | 重庆市能源投资集团科技有限责任公司 | 煤矿井下超高压压裂孔的钻孔封孔方法及封孔装置 |
CN105510396B (zh) * | 2015-11-24 | 2018-06-29 | 山东科技大学 | 一种用于煤层注水润湿范围的测试装置以及测试方法 |
CN205314958U (zh) * | 2016-01-13 | 2016-06-15 | 河南工业和信息化职业学院 | 一种瓦斯抽放及注浆用封孔器 |
-
2018
- 2018-05-23 CN CN201810498213.XA patent/CN108955989B/zh active Active
- 2018-12-29 WO PCT/CN2018/125191 patent/WO2019223316A1/zh active Application Filing
- 2018-12-29 AU AU2018424685A patent/AU2018424685B2/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000065659A (ja) * | 1998-08-17 | 2000-03-03 | Dia Consultant:Kk | 間隙水計測装置 |
CN202693190U (zh) * | 2012-06-14 | 2013-01-23 | 中国水电顾问集团华东勘测设计研究院 | 一种手持便携式岩溶裂隙水压力测量仪 |
CN105190366A (zh) * | 2013-03-08 | 2015-12-23 | 沙特阿拉伯石油公司 | 使用饱和度及核磁共振测井数据确定地表下地层的连续毛细管压力曲线 |
CN105486353A (zh) * | 2016-01-19 | 2016-04-13 | 山东科技大学 | 一种岩体裂隙水综合信息传感器及使用方法 |
CN206338091U (zh) * | 2016-11-30 | 2017-07-18 | 中国石油天然气集团公司 | 一种超高深围岩裂隙水自动监测装置 |
CN206458505U (zh) * | 2016-11-30 | 2017-09-01 | 中国石油天然气集团公司 | 一种测量围岩裂隙水压力的压力计孔 |
CN108955989A (zh) * | 2018-05-23 | 2018-12-07 | 山东科技大学 | 用于确定注水煤层裂隙内部水压力的测试装置及测试方法 |
Non-Patent Citations (1)
Title |
---|
WANG, ZHENGHUA ET AL.: "Determination of Coal Seam Affusion Pressure Based on Pore Characteristic and Wettability", COAL TECHNOLOGY, vol. 31, no. 10, 31 October 2012 (2012-10-31), pages 60 - 62, ISSN: 10088725 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111963155A (zh) * | 2020-08-19 | 2020-11-20 | 山东科技大学 | 一种煤层注水润湿范围检测装置、检测方法及均化方法 |
CN111963155B (zh) * | 2020-08-19 | 2023-12-08 | 山东科技大学 | 一种煤层注水润湿范围检测装置、检测方法及均化方法 |
CN113155200A (zh) * | 2021-05-16 | 2021-07-23 | 天地科技股份有限公司 | 一种煤矿地下水库煤柱坝体损伤破坏测定装置与方法 |
Also Published As
Publication number | Publication date |
---|---|
AU2018424685B2 (en) | 2021-09-30 |
CN108955989B (zh) | 2019-07-05 |
AU2018424685A1 (en) | 2021-01-21 |
CN108955989A (zh) | 2018-12-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2019223316A1 (zh) | 用于确定注水煤层裂隙内部水压力的测试装置及测试方法 | |
CN105716747B (zh) | 矿井下岩层地应力快速测量装备及方法 | |
CN109540734B (zh) | 可控水分的含瓦斯煤体高压吸附/解吸试验装置及方法 | |
CN210322723U (zh) | 一种长岩心注气驱替实验装置 | |
CN201041029Y (zh) | 油井水泥失重和气液窜模拟测试装置 | |
CN104568727A (zh) | 高温高压腐蚀氢渗透测试装置及测试方法 | |
WO2020151138A1 (zh) | 一种气液两相饱和煤岩样实验装置及饱和度测试方法 | |
CN106959464B (zh) | 一种氡析出率的测量装置和测量方法 | |
CN211317660U (zh) | 一种燃气管道安装用密封性检测装置 | |
EA024784B1 (ru) | Способ определения давления гидропрорыва герметичной зоны контакта цементного камня со стенками испытательной камеры и установка для реализации такого способа | |
CN110595975A (zh) | 混凝土氯离子扩散模拟试验装置及检测方法 | |
CN102636546B (zh) | 一种电化学改变煤岩气吸附解吸性能的试验装置 | |
CN103114851B (zh) | 不同裂隙发育煤层产气贡献能力大小测试装置 | |
CN211122457U (zh) | 一种用于水压环境下混凝土中氯离子传输试验的装置 | |
CN108181149A (zh) | 一种含气土的制备装置及方法 | |
CN207111070U (zh) | 测量钻孔内负压及流量分布特性的实验装置 | |
CN206016802U (zh) | 管柱漏点检测装置 | |
CN206281755U (zh) | 透水路面和试件两用透水系数测定仪 | |
CN110454126B (zh) | 渗吸采油用渗吸剂评价实验装置及方法 | |
CN208297305U (zh) | 一种二氧化碳岩心驱替实验装置 | |
CN210180884U (zh) | 一种改变混合气体电场和湿度的三轴渗流装置 | |
CN207540927U (zh) | 一种瓦斯解吸速度测定仪 | |
CN109424339B (zh) | 采油模拟装置 | |
CN206957703U (zh) | 页岩气井中损失气解吸气量的测试装置 | |
CN207964543U (zh) | 一种用于测量深井排气效率的实验平台 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18919746 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2018424685 Country of ref document: AU Date of ref document: 20181229 Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 18919746 Country of ref document: EP Kind code of ref document: A1 |