LU504809B1 - Method utilizing drilling and gel injection to test fracture development characteristics of hanging wall and footwall strata - Google Patents
Method utilizing drilling and gel injection to test fracture development characteristics of hanging wall and footwall strata Download PDFInfo
- Publication number
- LU504809B1 LU504809B1 LU504809A LU504809A LU504809B1 LU 504809 B1 LU504809 B1 LU 504809B1 LU 504809 A LU504809 A LU 504809A LU 504809 A LU504809 A LU 504809A LU 504809 B1 LU504809 B1 LU 504809B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- gel injection
- gel
- drill bit
- silica gel
- injection
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 140
- 239000007924 injection Substances 0.000 title claims abstract description 140
- 238000005553 drilling Methods 0.000 title claims abstract description 50
- 208000010392 Bone Fractures Diseases 0.000 title claims abstract description 40
- 206010017076 Fracture Diseases 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000011161 development Methods 0.000 title claims abstract description 32
- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 239000000499 gel Substances 0.000 claims abstract description 124
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000000741 silica gel Substances 0.000 claims abstract description 74
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 74
- 239000011435 rock Substances 0.000 claims abstract description 39
- 230000000284 resting effect Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000002591 computed tomography Methods 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 239000003245 coal Substances 0.000 description 11
- 238000005065 mining Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 208000008918 voyeurism Diseases 0.000 description 4
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/008—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/20—Computer models or simulations, e.g. for reservoirs under production, drill bits
Abstract
A method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata, the method comprises the following steps: step (1) selecting a suitable drilling position in a downhole tunnel; step (2) drilling a small-aperture drill hole; step (3) pushing a gel injection drill bit into the drill hole, and causing the front end of the gel injection drill bit to finally stop at a position 2m from the bottom of the drill hole; step (4) using a gel injection agitating apparatus to connect the gel injection pipeline and performing a segment-by-segment gel injection operation; step (5) resting the gel injection drill bit for 0.5-1 days, and extracting the gel injection drill bit after the silica gel has completely solidified; step (6) performing a segment-by- segment coring operation, and sending all of the extracted silica gel rock cores to a laboratory; step (7) testing, researching and analyzing the extracted silica gel rock cores. The present invention is based on scientific principles, convenient to operate and low in cost, allows for accurately quantifying and qualitatively grasping the characteristics of fracture development in a drill hole, can be applied to mines requiring testing of the development characteristics of water diversion fraction zones and footwall failure zones, and is highly worthy of popularization.
Description
BL-5774
METHOD UTILIZING DRILLING AND GEL INJECTION TO TEST FRACTURE LU504809
DEVELOPMENT CHARACTERISTICS OF HANGING WALL AND FOOTWALL
STRATA
The present application relates to the technical field of coal mining, and in particular to a method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata.
Background Information
At this stage, the coal is necessary as the main energy source in China, otherwise it is not enough to support the modernization of the state. However, the coal mining process 1s accompanied by more disasters, especially water disasters in hanging wall and footwall, which pose the greater threat to the safety in production of the coal mining enterprises and workers' safety. Especially for coal mining below the hanging wall aquifer and coal mining above the footwall confined water, the fracture characteristics of rock strata in the water diversion fraction zone formed by coal mining are not clearly, especially for the structural rock mass, such as fault and collapse column, which are the main factors causing water inrush in the mine. Through the previous decades of the coal mining, we have accumulated some water diversion fraction zone detection methods and experiences, for example, the maximum height of the water diversion fraction zone can be evaluated by using the double-end water plugging device to test the leakage of the drill, and the maximum height of the water diversion fraction zone can be determined by using the drill peeping system to observe the broken situation of the inner wall of the drill. The above methods can only determine the development height of the water diversion fraction zone from a certain angle, and can not quantitatively describe the development characteristics of the fracture in the water diversion fraction zone, and can not accurately guide the safe and efficient production of the coal mining. Therefore, exploring a method that can quantitatively describe the fracture development characteristics of hanging wall and footwall strata of the drill is an important practical requirement for safe and efficient green mining in the coal mining at this stage.
The patent with application number 202010018566.2 discloses a drill peeping equipment with pushing mechanism, which can push the drill peeping device, observe the development situation of the fracture in the drill, avoid to manually insert the peeping probe into the drill, save the physical 1
BL-5774
LU504809 strength of the operator, reduce the labor intensity of the operator, and save the work time by using the mechanism. This patent can macroscopically detect the existence situation of the fracture in the drill wall, but cannot quantitatively describe the size of the fracture and cannot reveal the extension situation of the fracture.
The patent with application number 201910286888.2 discloses a testing device and testing method based on the double-end water plugging device, which integrates the sealing and water injection leakage structure into a box, which is easy to carry and assemble, and can measure the water leakage on the drill wall within a certain range of drill. By analyzing the water leakage of drill, the development situation of the water diversion fraction and the maximum development height of the water diversion fraction zone can be measured. This method is widely used in engineering, but it can only roughly reflect the fracture development situation by the water leakage, and cannot accurately and quantitatively describe the water diversion fraction development characteristics.
Therefore, it is particularly important to design a method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata. By pumping rapidly the shaped silica gel into the small aperture of drill, after the silica gel is solidified, a large coring drilling rig is used to take out the rock cores with silica gel, and quantitatively test the water diversion fraction development characteristics.
In order to solve the deficiencies in the prior art, the present invention provides a method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata, which 1s scientific principles, easy to operate, and has high accuracy in the testing data; The silica gel pumping device is used to pump rapidly the shaped silica gel into the small aperture of drill, after the silica gel is fully solidified, a large aperture coring drill bit is used to take out the rock cores with silica gel. By measuring the shape of the silica gel that is entered into the rock fracture, the water diversion fraction development characteristics on the hanging wall and footwall of the coal seam can be quantitatively described, which has high theoretical research and field measurement significance.
In order to solve the above-mentioned technical problem, the present application provides the following technical solutions: A method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata, which comprises the following 2
BL-5774
LU504809 steps: step (1) selecting a suitable drilling position in a downhole tunnel; step (2) arranging a drilling rig in a tunnel, and using a drill bit and a drill pipe with small aperture for drilling according to design requirements, without need for coring, and can be drilled directly; step (3) after drilling 1s completed, exiting the drill bit and the drill pipe from drill hole, removing the drill bit, and installing a gel injection drill bit on the drill pipe, where a gel injection pipeline connected to the gel injection drill bit passes through a hollow drill pipe, and manipulating the drilling rig to slowly push the gel injection drill bit into the drill hole, and cause the front end of the gel injection drill bit to finally stop at a position 2m from the bottom of the drill hole; step (4) using a gel injection agitating apparatus to connect the gel injection pipeline and performing a segment-by-segment gel injection operation, after each segment of gel injection is completed, operating the drilling rig to move the drill pipe and the gel injection drill bit a certain distance outside the orifice of the drill bit until all internal gel injection operations are completed, at this time, the rear end of the gel injection drill bit is flushed with the orifice of the drill bit; step (5) resting the gel injection drill bit for 0.5-1 days, extracting the gel injection drill bit after a silica gel has completely solidified, and cleaning the gel injection agitating apparatus, pipeline, and the gel injection drill bit for future use; step (6) performing a segment-by-segment coring operation, and sending all of extracted silica gel rock cores to a laboratory; step (7) testing, researching and analyzing the extracted silica gel rock cores.
By adopting the above technical solution, the present invention combines the existing test techniques and comprehensively utilizes the characteristics of easy formation and solidification of the liquid silica gel to provide central support for rock coring. By the drilled and gel injected rock cores, the failure characteristics of the rock strata in the water diversion fraction zones can be quantifying and qualitatively analyzed. Compared with the prior art, the present invention overcomes the shortcomings of drilling observation that can only qualitatively describe two- dimensional fracture, and the double-end water plugging that can only vaguely and quantitatively describe the characteristics of fracture development. The present invention is based on scientific principles, convenient to operate and low in cost, allows for accurately quantifying and qualitatively 3
BL-5774
LU504809 grasping the characteristics of fracture development in a drill hole, can be applied to mines requiring testing of the development characteristics of water diversion fraction zones and footwall failure zones, and is highly worthy of popularization.
Fig. 1 is a schematic diagram of the specific construction location in the tunnel of the present invention;
Fig. 2 is a structure schematic diagram of the gel injection agitating apparatus in the present invention;
Fig. 3 is a structural schematic diagram of the gel injection drill bit used in the present invention;
Fig. 4 is a schematic diagram of the silica gel rock cores obtained by the coring drill bit of the present invention.
As shown in Figs. 1-4, a method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata of the present invention comprises the following steps: step (1) selecting a suitable drilling position in a downhole tunnel; step (2) arranging a drilling rig in a tunnel, and using a drill bit and a drill pipe with small aperture for drilling according to design requirements, without need for coring, and can be drilled directly; step (3) after drilling 1s completed, exiting the drill bit and the drill pipe from drill hole, removing the drill bit, and installing a gel injection drill bit on the drill pipe, where a gel injection pipeline 1 connected to the gel injection drill bit passes through a hollow drill pipe, and manipulating the drilling rig to slowly push the gel injection drill bit into the drill hole, and cause the front end of the gel injection drill bit to finally stop at a position 2m from the bottom of the drill hole; step (4) using a gel injection agitating apparatus to connect the gel injection pipeline 1 and performing a segment-by-segment gel injection operation, after each segment of gel injection is completed, operating the drilling rig to move the drill pipe and the gel injection drill bit a certain distance outside the orifice of the drill bit until all internal gel injection operations are completed, at this time, the rear end of the gel injection drill bit is flushed with the orifice of the drill bit; step (5) resting the gel injection drill bit for 0.5-1 days, extracting the gel injection drill bit after a silica gel has completely solidified, and cleaning the gel injection agitating apparatus, pipeline, 4
BL-5774
LU504809 and the gel injection drill bit for future use; step (6) performing a segment-by-segment coring operation, and sending all of extracted silica gel rock cores to a laboratory; step (7) testing, researching and analyzing the extracted silica gel rock cores.
Step (1) is specifically: selecting the tunnel which is suitable for drilling rig construction, and setting up a construction site within the tunnel based on the model of the drilling rig, when the space of the tunnel is insufficient for the drilling rig construction, the tunnel should be widened to meet the construction requirements; when designing the drilling direction of the drill bit, an inclination angle of a hanging wall drill bit is 40-60° , and an inclination angle of a footwall drill bit is 60- 90° , which is the optimal choice, and this is beneficial for liquid silica gel to enter surrounding cracks during the gel injection process.
The gel injection drill bit includes a hard gel injection pipe 2 which is hollow, and the outer circle of the rear port of the hard gel injection pipe 2 is threaded to the inner circle of the port of the drill pipe 17, the front port of the gel injection pipeline 1 is extended into and is threaded to the inside of the rear port of the hard gel injection pipe 2, the outer circle of the hard gel injection pipe 2 is fixed with several rubber seal retaining rings 3, which are evenly arranged along the axial direction of the hard gel injection pipe 2, and the outer edge of each rubber seal retaining ring 3 is tilted forward to form a conical cylindrical shape with thick front and thin back.
The gel injection agitating apparatus includes the agitating drum 4 and the agitator motor 5 which 1s disposed on the top of the agitating drum 4, and the high pressure gas injection pipe 6 is disposed on the upper side of the agitating drum 4, the gas valve 7 and the manometer 8 are disposed on the high pressure gas injection pipe 6, the silica gel outlet pipe 9 is disposed on the lower side of the agitating drum 4, the discharge valve 10 is disposed on the silica gel outlet pipe 9, the curing agent injection port 11 and the liquid silica gel injection port 12 are the disposed on the top of the agitating drum 4, the main axis of the agitator motor 5 is vertically upward disposed and is coaxially connected to the agitating axis 13 which is extended into the agitating drum 4, and the agitating impeller 14 is disposed on the agitating axis 13.
The specific process of using a gel injection agitating apparatus to connect the gel injection pipeline 1 and performing a segment-by-segment gel injection operation in the step (4) is: connecting the gel injection pipeline 1 to the silica gel outlet pipe 9 on the lower side of the agitating
BL-5774
LU504809 drum 4, adding required proportion of a curing agent and a liquid silica gel to the agitating drum 4 through the curing agent injection port 11 and the liquid silica gel injection port 12, and starting the agitator motor 5, which drives the agitating axis 13 and the agitating impeller 14 to agitate the curing agent and liquid silica gel in the agitating drum 4, while agitating, the high pressure gas injection pipe 6 is connected to a compressed air pipeline of the downhole, when the gas valve 7 is opened, an air pressure above a silica gel mixture in the agitating drum 4 is around 1 Mpa is monitored by a manometer 8, and the discharge valve 10 is opened, under the action of high pressure gas, the silica gel mixture is injected into the gel injection drill bit by the silica gel outlet pipe 9 and the gel injection pipeline 1, and then the silica gel mixture is injected into a 2-meter cavity between the bottom of the drill hole and the gel injection drill bit by the front port of the gel injection drill bit, during the gel injection process, the rubber seal retaining ring 3 is played a role in blocking the overflow of the silica gel, at the 30 seconds of the gel injection, at the same time, the pressure is maintained for 30 seconds and the 2-meter cavity is filled, the silica gel is pressed into fracture of a drill hole wall, the discharge valve 10 is closed, the drilling rig is operated to retract the gel injection drill bit by 2m, and then the discharge valve 10 is opened again, the 2-meter cavity is operated again according to the above gel injection process, at the 30 seconds of the gel injection, while the pressure 1s maintained for 30 seconds, the 2-meter cavity is filled, and the silica gel is pressed into the fracture of the drill hole wall, the discharge valve 10 is closed; the above operations are repeated in sequence according to the above gel injection process until all hole gel injections are completed. The rubber seal retaining ring 3 of the gel injection drill bit is kept at the position of the orifice of the drill hole for 0.5-1 days, and the gel injection pipeline inlet is sealed to prevent the solidification and leakage of the liquid silica gel. This can ensure that the silica gel inside drill hole is in a saturated state, and can avoid a large number of voids in the rock cores after solidification, which may cause the extracted rock cores to be relatively broken and unable to proceed with the next research work.
The specific process of the segment-by-segment coring operation in the step (6) is: installing the large aperture drill pipe 17 and a coring drill bit on the drilling rig, and according to the design azimuth angle of the drill bit, removing silica gel rock cores filled with silica gel by segment along the center line of the drill bit, the silica gel rock cores are the cylindrical rock 16 wrapped in the outer circle of silica gel column 15, and placing the extracted silica gel rock cores by segment in rock core box in order and marking that according to drilling depth; until all gel injection segments 6
BL-5774
LU504809 are extracted.
The specific process of the step (7) is: performing CT scanning on the extracted silica gel rock cores, and reconstructing the columnar shape of each segment of the silica gel rock cores in three- dimensional on a computer, overall or a segment of the fracture development characteristics can be quantitatively analyzed by the computer; after scanning the silica gel rock cores, peripheral rock 16 is crushed, and silica gel column 15 with fracture is taken out, through macroscopic analysis of the diffusion of the silica gel in the fracture, a failure degree of rock in fracture zone is reflected. 7
Claims (7)
1. A method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata, characterized in that, comprising the following steps: step (1) selecting a suitable drilling position in a downhole tunnel; step (2) arranging a drilling rig in a tunnel, and using a drill bit and a drill pipe with small aperture for drilling according to design requirements, without need for coring, and can be drilled directly; step (3) after drilling 1s completed, exiting the drill bit and the drill pipe from drill hole, removing the drill bit, and installing a gel injection drill bit on the drill pipe, where a gel injection pipeline connected to the gel injection drill bit passes through a hollow drill pipe, and manipulating the drilling rig to slowly push the gel injection drill bit into the drill hole, and cause the front end of the gel injection drill bit to finally stop at a position 2m from the bottom of the drill hole; step (4) using a gel injection agitating apparatus to connect the gel injection pipeline and performing a segment-by-segment gel injection operation, after each segment of gel injection is completed, operating the drilling rig to move the drill pipe and the gel injection drill bit a certain distance outside the orifice of the drill bit until all internal gel injection operations are completed, at this time, the rear end of the gel injection drill bit is flushed with the orifice of the drill bit; step (5) resting the gel injection drill bit for 0.5-1 days, extracting the gel injection drill bit after a silica gel has completely solidified, and cleaning the gel injection agitating apparatus, pipeline, and the gel injection drill bit for future use; step (6) performing a segment-by-segment coring operation, and sending all of extracted silica gel rock cores to a laboratory; step (7) testing, researching and analyzing the extracted silica gel rock cores.
2. The method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata according to claim 1, characterized in that, step (1) is specifically: selecting the tunnel which is suitable for drilling rig construction, and setting up a construction site within the tunnel based on the model of the drilling rig, when the space of the tunnel is insufficient for the drilling rig construction, the tunnel should be widened to meet the construction requirements; when designing the drilling direction of the drill bit, an inclination angle of a hanging wall drill bit is 40-60° ‚and an inclination angle of a footwall drill bit is 60-90° ‚which is the optimal choice, 8
BL-5774 LU504809 and this 1s beneficial for liquid silica gel to enter surrounding cracks during the gel injection process.
3. The method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata according to claim 1, characterized in that, the gel injection drill bit includes a hard gel injection pipe which is hollow, and the outer circle of the rear port of the hard gel injection pipe is threaded to the inner circle of the port of the drill pipe, the front port of gel Injection pipeline of the gel injection pipe is extended into and is threaded to the inside of the rear port of the hard gel injection pipe, the outer circle of the hard gel injection pipe is fixed with several rubber seal retaining rings, which are evenly arranged along the axial direction of the hard gel Injection pipe, and the outer edge of each rubber seal retaining ring is tilted forward to form a conical cylindrical shape with thick front and thin back.
4. The method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata according to claim 3, characterized in that, the gel injection agitating apparatus includes an agitating drum and an agitator motor which is disposed on the top of the agitating drum, and a high pressure gas injection pipe is disposed on the upper side of the agitating drum, a gas valve and a manometer are disposed on the high pressure gas injection pipe, a silica gel outlet pipe is disposed on the lower side of the agitating drum, a discharge valve is disposed on the silica gel outlet pipe, a curing agent injection port and a liquid silica gel injection port are the disposed on the top of the agitating drum, the main axis of the agitator motor is vertically upward disposed and is coaxially connected to an agitating axis which is extended into the agitating drum, and an agitating impeller is disposed on the agitating axis.
5. The method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata according to claim 4, characterized in that, the specific process of using a gel injection agitating apparatus to connect the gel injection pipeline and performing a segment-by-segment gel injection operation in the step (4) is: connecting the gel injection pipeline to the silica gel outlet pipe on the lower side of the agitating drum, adding required proportion of a curing agent and a liquid silica gel to the agitating drum through the curing agent injection port and the liquid silica gel injection port, and starting the agitator motor, which drives the agitating axis 9
BL-5774 LU504809 and the agitating impeller to agitate the curing agent and liquid silica gel in the agitating drum, while agitating, the high pressure gas injection pipe is connected to a compressed air pipeline of the downhole, when the gas valve is opened, an air pressure above a silica gel mixture in the agitating drum 1s around 1 Mpa is monitored by a manometer, and the discharge valve is opened, under the action of high pressure gas, the silica gel mixture is injected into the gel injection drill bit by the silica gel outlet pipe and the gel injection pipeline, and then the silica gel mixture is injected into a 2-meter cavity between the bottom of the drill hole and the gel injection drill bit by the front port of the gel injection drill bit, during the gel injection process, the rubber seal retaining ring is played a role in blocking the overflow of the silica gel, at the 30 seconds of the gel injection, at the same time, the pressure is maintained for 30 seconds and the 2-meter cavity is filled, the silica gel is pressed into fracture of a drill hole wall, the discharge valve is closed, the drilling rig is operated to retract the gel injection drill bit by 2m, and then the discharge valve is opened again, the 2-meter cavity is operated again according to the above gel injection process, at the 30 seconds of the gel injection, while the pressure is maintained for 30 seconds, the 2-meter cavity is filled, and the silica gel is pressed into the fracture of the drill hole wall, the discharge valve is closed; the above operations are repeated in sequence according to the above gel injection process until all hole gel injections are completed.
6. The method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata according to claim 5, characterized in that, the specific process of the segment-by-segment coring operation in the step (6) is: installing a large aperture drill pipe and a coring drill bit on the drilling rig, and according to the design azimuth angle of the drill bit, removing silica gel rock cores filled with silica gel by segment along the center line of the drill bit, the silica gel rock cores are a cylindrical rock wrapped in the outer circle of silica gel column, and placing the extracted silica gel rock cores by segment in rock core box in order and marking that according to drilling depth; until all gel injection segments are extracted.
7. The method utilizing drilling and gel injection to test the fracture development characteristics of hanging wall and footwall strata according to claim 6, characterized in that, the specific process of the step (7) is: performing CT scanning on the extracted silica gel rock cores, and reconstructing
BL-5774 LU504809 the columnar shape of each segment of the silica gel rock cores in three-dimensional on a computer,
overall or a segment of the fracture development characteristics can be quantitatively analyzed by the computer; after scanning the silica gel rock cores, peripheral rock is crushed, and silica gel column with fracture is taken out, through macroscopic analysis of the diffusion of the silica gel in the fracture, a failure degree of rock in fracture zone 1s reflected.
11
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210486510.9A CN114837661A (en) | 2022-05-06 | 2022-05-06 | Method for testing top and bottom plate rock stratum fracture development characteristics by using drilling and glue injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| LU504809A1 LU504809A1 (en) | 2023-11-06 |
| LU504809B1 true LU504809B1 (en) | 2023-12-08 |
Family
ID=82568208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU504809A LU504809B1 (en) | 2022-05-06 | 2023-03-24 | Method utilizing drilling and gel injection to test fracture development characteristics of hanging wall and footwall strata |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN114837661A (en) |
| LU (1) | LU504809B1 (en) |
| WO (1) | WO2023131359A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837661A (en) * | 2022-05-06 | 2022-08-02 | 河南理工大学 | Method for testing top and bottom plate rock stratum fracture development characteristics by using drilling and glue injection |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4694916A (en) * | 1986-09-22 | 1987-09-22 | R. C. Ltd. | Continuous coring drill bit |
| CN104265219B (en) * | 2014-09-19 | 2016-10-19 | 中国矿业大学 | A kind of core original state structure recognition means and method |
| CN107044280A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of bored grouting detection method of mining overburden absciss layer distribution characteristics |
| CN107676107A (en) * | 2017-09-20 | 2018-02-09 | 中铁十四局集团有限公司 | Tunnel reinforcement crack treatment method |
| CN210104590U (en) * | 2019-02-19 | 2020-02-21 | 浙江宏盛工程设计有限公司 | Glue injection device for hinge joint of plate beam |
| CN114837661A (en) * | 2022-05-06 | 2022-08-02 | 河南理工大学 | Method for testing top and bottom plate rock stratum fracture development characteristics by using drilling and glue injection |
-
2022
- 2022-05-06 CN CN202210486510.9A patent/CN114837661A/en active Pending
-
2023
- 2023-03-24 LU LU504809A patent/LU504809B1/en active IP Right Grant
- 2023-03-24 WO PCT/CN2023/083837 patent/WO2023131359A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023131359A1 (en) | 2023-07-13 |
| CN114837661A (en) | 2022-08-02 |
| LU504809A1 (en) | 2023-11-06 |
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Effective date: 20231208 |