CN113107471B - System and method for testing stress distribution characteristics before mining based on capsule pressure change - Google Patents
System and method for testing stress distribution characteristics before mining based on capsule pressure change Download PDFInfo
- Publication number
- CN113107471B CN113107471B CN202110526070.0A CN202110526070A CN113107471B CN 113107471 B CN113107471 B CN 113107471B CN 202110526070 A CN202110526070 A CN 202110526070A CN 113107471 B CN113107471 B CN 113107471B
- Authority
- CN
- China
- Prior art keywords
- pressure
- capsule
- water injection
- hole sealing
- hole
- 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.)
- Active
Links
- 239000002775 capsule Substances 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 238000005065 mining Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000007789 sealing Methods 0.000 claims abstract description 76
- 238000002347 injection Methods 0.000 claims abstract description 57
- 239000007924 injection Substances 0.000 claims abstract description 57
- 239000003245 coal Substances 0.000 claims abstract description 41
- 238000005553 drilling Methods 0.000 claims description 14
- 238000012794 pre-harvesting Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 230000003203 everyday effect Effects 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a system and a method for testing the distribution characteristics of mining stress based on capsule pressure change, which are suitable for testing the ground stress of a coal seam. The test system comprises a water injection pump, a water injection pipeline, a pressure gauge, a push rod and a hole sealing capsule, wherein two groups of cross-layer drill holes are constructed in a coal seam floor roadway in front of a mining face along the coal seam floor roadway at intervals; and recording the reading of the pressure gauge corresponding to each cross-layer drill hole along with the propulsion of the working surface, thereby obtaining the distribution change information of the coal seam stress in the propulsion of the working surface. The method has simple steps, and can quickly and effectively judge the positions of the pressure relief area, the stress concentration area and the original rock stress area in front of the mining face.
Description
Technical Field
The invention relates to a system and a method for testing the distribution characteristics of mining stress, in particular to a system and a method for testing the distribution characteristics of mining stress based on capsule pressure change, which are suitable for testing the ground stress of a coal bed.
Background
The underground mining operation of the coal mine destroys the stress balance state in the original stratum, so that the stress of the coal rock mass is redistributed. A higher stress concentration is formed at the excavation space interface within a shorter time of the excavation space formation. When the concentrated stress reaches the strength limit of the coal body, the coal body of the part firstly generates yield deformation, so that the stress concentration is transferred to the deep part of the coal body, and after a period of time, a pressure relief area, a stress concentration area and an original stress area are sequentially formed in front of a mining surface. The coal bodies in the pressure relief area and the plastic area are subjected to stress concentration, the maximum bearing capacity of the coal bodies is achieved, and a limit stress area is formed. The stress state of the ultimate stress zone and the length of the pressure relief belt have great influence on the coal and gas outburst.
Stress fields are directional, three-dimensional stress values of a pressure relief area in front of a mining face, a stress concentration area and an original stress area are different, and the difference can cause the difference of coal-rock body mechanical behaviors, so that the opening and closing mechanism of cracks, the flowing state of gas and the outburst risk of the coal and the gas can be influenced. Horizontal stresses dominate during current deep mining.
Geostress is one of the most significant factors contributing to coal and gas outburst. At present, the main methods for testing the ground stress include a surface stress measurement method, a trepanning stress relief method and a hydrofracturing method, wherein the trepanning stress relief method is further divided into a hole wall strain method, a hole diameter deformation method and a hole bottom strain method, and the hole wall strain method is further divided into a direct patch type method and a hollow inclusion method. The most widely used methods currently are the hollow inclusion release method and the hydraulic fracturing method. Because coal has obvious plastic deformation, the method is based on the elastic theory, is only suitable for the crustal stress test of hard rock formations, and has less research on the crustal stress test of coal beds.
At present, the main methods for testing the width of a pressure relief zone comprise a drilling cutting method, a gas content method, a drilling gas initial velocity method and a gas extraction parameter method. The method utilizes parameters such as drilling cuttings, gas, extraction and the like to indirectly reflect the stress change in front of the mining face, and direct test and research on the stress state are less.
Disclosure of Invention
Aiming at the defects of the prior art, the system and the method for testing the stress distribution characteristics before mining based on the pressure change of the capsules are provided, the stress distribution characteristics before the mining surface of the coal seam are judged according to the pressure change of the liquid filled in the capsules in different drill holes, and technical and method guidance is provided for determining the width of a pressure relief belt in front of the mining surface, the range of arranging outburst prevention measures and the next mining deployment.
In order to achieve the purpose, the system for testing the stress distribution characteristics before mining based on the pressure change of the capsule comprises a hole sealing capsule and a push rod, wherein the hole sealing capsule is connected with a water injection pump through a water injection pipeline, the water injection pump is a manual hydraulic water injection pump, and a pressure gauge and a switch valve are respectively arranged on the water injection pipeline.
A test method of a mining face front ground stress test system based on capsule pressure change comprises the following steps:
constructing two groups of cross-layer drill holes to the coal seam at intervals along the coal seam floor roadway in front of the mining face, wherein one group of cross-layer drill holes are arranged at an angle of 45 degrees with the direction perpendicular to the roadway, and the other group of cross-layer drill holes are arranged at an angle of 45 degrees with the direction parallel to the roadway;
step two, filling water into the hole sealing capsule and the water injection pipeline to realize exhaust, and discharging water in the hole sealing capsule after the exhaust;
connecting a water injection pipeline and a hole sealing capsule, sending the hole sealing capsule into the bottom of the cross-layer drill hole by using a push rod, and exposing the pressure outside the cross-layer drill hole for convenient reading;
opening a valve, injecting water into the hole sealing capsule through a water injection pipeline by using a water injection pump, setting the initial water injection pressure to be 5-10MPa, and expanding the hole sealing capsule after injecting water for 2 min;
recording the reading of the pressure gauge at the moment when the water injection pump cannot inject continuously, closing the valve, stopping injecting water, observing the water pressure change in the hole sealing capsule through the pressure gauge arranged on the water injection pipeline, and continuously injecting water for supplementing into the hole sealing capsule when the reading of the pressure gauge is reduced; when the reading of the pressure gauge is stable and is the same as the last recorded pressure value, the expanded hole sealing capsule is tightly attached to the inner wall of the cross-layer drill hole, then grouting hole sealing is carried out, and the length of the hole sealing section is 1/3 of the depth of the drill hole so as to prevent gas leakage;
and step six, repeating the step two to the step five, arranging hole sealing capsules injected with water in the hole bottoms of the two groups of cross-layer drill holes, sealing the holes, observing and recording the reading of a pressure gauge corresponding to each cross-layer drill hole every day along with the propulsion of the working surface, and thus obtaining the distribution change information of the coal bed stress in the propulsion of the working surface.
Further, the drilling depth of the cross-layer drilling hole is determined according to the relative position of the tested coal bed and the floor roadway, and drilling can be stopped 2.5m after the cross-layer drilling hole is drilled until the coal is seen; the same group of through-layer drill holes arranged in the same direction are spaced by 2-5m, tracks are kept parallel, and two groups of through-layer drill holes in different directions are alternately arranged at equal intervals.
Further, the pressure direction measured by the sealing capsules in the cross-layer drill holes arranged at an angle of 45 degrees to the direction perpendicular to the roadway is parallel to the direction of the roadway, and the pressure direction measured by the sealing capsules in the cross-layer drill holes arranged at an angle of 45 degrees to the direction parallel to the direction of the roadway is perpendicular to the direction of the roadway.
Further, recording an initial pressure value after the stabilization in the fourth step as P0, in the fifth step, if the observed pressure of the hole sealing capsules is greater than P0, it is indicated that the drill hole is arranged in the stress concentration area, if the observed pressure of the hole sealing capsules is less than P0, it is indicated that the drill hole is arranged in the pressure relief area, and if the observed pressure of the hole sealing capsules approaches P0, it is indicated that the drill hole is arranged in the original stress area; as the face progresses, three zones of locations are shifted and pressure gauge readings within each borehole are dynamically changed to infer the extent of the pressure relief and stress concentration zones and the location of stress peaks.
Has the advantages that:
by arranging the hole sealing capsules in different stress areas in the coal seam, the stress concentration area, the pressure relief area and the original stress area can be judged by comparing with the initial water injection pressure due to different extrusion of the hole sealing capsules; meanwhile, the hole sealing capsules are arranged in different directions, so that the horizontal stress state can be known. The method can be verified with the gas content extracted by the bottom plate roadway in the three areas before mining, so that the accuracy of the test is improved. The method is simple and convenient, saves cost, has no influence of other factors on the determination process, has accurate and reliable test results, and has wide application prospect.
Drawings
FIG. 1 is a schematic structural diagram of a system for testing the distribution characteristics of the mining stress based on the pressure change of a capsule;
FIG. 2 is a schematic view of the arrangement of cross-drilled holes in different directions according to the present invention;
in the figure: 1-sealing capsules, 2-drilling, 3-push rods, 4-water injection pipelines, 5-pressure sensors, 6-switch valves and 7-water injection pumps.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
As shown in figure 1, the system for testing the distribution characteristics of the mining stress based on the capsule pressure change comprises a hole sealing capsule 1 and a push rod 3, wherein the hole sealing capsule 1 is connected with a water injection pump 7 through a water injection pipeline 4, the water injection pump 7 is a manual hydraulic water injection pump, and a pressure gauge 5 and a switch valve 6 are respectively arranged on the water injection pipeline 4.
A test method of a mining face front ground stress test system based on capsule pressure change comprises the following steps:
constructing two groups of cross-layer drill holes 2 to a coal seam at intervals along a coal seam floor roadway in front of a mining face, wherein one group of cross-layer drill holes 2 are arranged at an angle of 45 degrees with the direction perpendicular to the roadway, and the other group of cross-layer drill holes 2 are arranged at an angle of 45 degrees with the direction parallel to the roadway;
the drilling depth of the cross-layer drill hole 2 is determined according to the relative position of the tested coal bed and the floor roadway, and drilling can be stopped 2.5m after the cross-layer drill hole is drilled until the coal is seen; the same group of through-layer drill holes 2 arranged in the same direction are spaced by 2-5m, tracks are kept parallel, and the two groups of through-layer drill holes 2 in different directions are alternately arranged at equal intervals;
step two, filling water into the hole sealing capsule 1 and the water injection pipeline 4 to realize exhaust, and then discharging the water in the hole sealing capsule 1;
connecting a water injection pipeline 4 and the hole sealing capsule 1, sending the hole sealing capsule 1 to the bottom of the cross-layer drill hole 2 by using a push rod 3, and exposing a pressure gauge 5 outside the cross-layer drill hole 2 for convenient reading; the pressure direction measured by the sealing capsules 1 in the through-layer drill holes 2 which are arranged at an angle of 45 degrees with the direction vertical to the roadway is parallel to the roadway, and the pressure direction measured by the sealing capsules 1 in the through-layer drill holes 2 which are arranged at an angle of 45 degrees with the direction parallel to the roadway is vertical to the roadway;
opening a valve 6, injecting water into the hole sealing capsule 1 through a water injection pipeline 4 by using a water injection pump 7, setting the initial water injection pressure to be 5-10MPa, and expanding the hole sealing capsule 1 after injecting water for 2 min;
recording the initial pressure value after the stabilization in the fourth step as P0, in the fifth step, if the observed pressure of the hole sealing capsule 1 is greater than P0, indicating that the drill hole 2 is arranged in the stress concentration area, if the observed pressure of the hole sealing capsule 1 is less than P0, indicating that the drill hole 2 is arranged in the pressure relief area, and if the observed pressure of the hole sealing capsule 1 approaches to P0, indicating that the drill hole 2 is arranged in the original stress area; as the face progresses, three zones of locations are shifted and pressure gauge readings within each borehole are dynamically changed to infer the extent of the pressure relief and stress concentration zones and the location of stress peaks.
Recording the reading of the pressure gauge 5 at the moment when the water injection pump 7 cannot inject continuously, closing the valve 6, stopping injecting water, observing the change of the water pressure in the hole sealing capsule 1 through the pressure gauge 5 arranged on the water injection pipeline 4, and continuously injecting water for supplement into the hole sealing capsule 1 when the reading of the pressure gauge 5 is reduced; when the reading of the pressure gauge 5 is stable and is the same as the last recorded pressure value, the expanded hole sealing capsule 1 is shown to be closely attached to the inner wall of the through-layer drill hole 2, then grouting hole sealing is carried out, and the length of the hole sealing segment is 1/3 of the depth of the drill hole so as to prevent gas leakage;
and step six, repeating the step two to the step five, arranging the hole sealing capsules 1 injected with water in the hole bottoms of the two groups of cross-layer drill holes 2, sealing the holes, observing and recording the reading of a pressure gauge 5 corresponding to each cross-layer drill hole 2 every day along with the propulsion of the working surface, and thus obtaining the distribution change information of the coal bed stress in the propulsion of the working surface.
Example one
The coal seam crustal stress test system based on capsule pressure change shown in figure 1 comprises a water injection pump 7, a water injection pipeline 4, a pressure sensor 5, a data acquisition instrument, a push rod 3 and a hole sealing capsule 1 at one end of the push rod, wherein the hole sealing capsule 1 has good expansion performance after water injection and is connected with the water injection pipeline 4 and a pressure gauge 5. The water injection pipeline 4 is provided with a switch valve 6; the water injection pump 7 adopts a manual hydraulic pump.
In order to ensure that the drill hole 2 can be tightly sealed, the invention adopts the water injection capsule 1 with the diameter of 80mm, the length of 80cm and the working pressure of 20MPa as a hole sealing material, the capsule is simple to assemble and disassemble, can be recycled, has good expansion performance, can reach 120mm after expansion, can be completely attached to the hole wall of the drill hole 2 with the diameter of 94mm, can continuously pressurize according to the expansion condition of the capsule 1, and ensures that the drill hole 2 can be well sealed; 4 layers of steel wires are adopted for wrapping, so that the steel wires are prevented from being extruded and damaged while bearing larger working pressure.
Example two
The system and the method for testing the pre-harvest stress distribution characteristics based on the pressure change of the capsule, which are shown in the figures 1 and 2, comprise the following steps:
in order to avoid mining influence and ensure that a complete pressure relief area and a complete stress concentration area are measured, a test site is arranged behind an advanced mining surface by 50 m; in order to ensure the accurate reading of the pressure gauge, a wooden box is prepared to serve as a protective cover.
Firstly, constructing two groups of through-layer drill holes 2 to a certain depth along a direction which is 45 degrees from the direction vertical to the roadway and a direction which is 45 degrees from the direction parallel to the roadway in a coal seam floor roadway in front of a mining surface, determining the depth of the drill holes 2 according to the relative position of a tested coal seam and the floor roadway, and stopping drilling 2.5m after coal is seen; the adjacent drill holes are drilled in the same direction at an interval of 5m, and the tracks are kept parallel.
Secondly, filling water into the hole sealing capsule 1 and the water injection pipeline 4 to realize exhaust, discharging water in the capsule 1 after the exhaust, connecting the water injection pipeline 4 and the hole sealing capsule 1, and conveying the hole sealing capsule 1 to the bottom of the drill hole 2 by using the push rod 3;
thirdly, opening a valve 6, injecting water into the hole sealing capsule 1 through a water injection pipeline 4, setting the initial water injection pressure to be 5MPa, and expanding the hole sealing capsule after injecting water for 2 min;
fourthly, when the water injection pump 7 cannot be pressed down continuously, the reading of the pressure gauge 5 is 8MPa, the valve 6 is closed, water injection is stopped, the water pressure change in the capsule 1 is observed through the pressure gauge 5 arranged on the water injection pipeline 4, and when the reading of the pressure gauge 5 is less than 8MPa, water injection supplement can be continuously performed to the drill hole 2; when the reading of the pressure gauge 5 is stable and equal to 8MPa, the expanded hole sealing capsule 1 is proved to be tightly attached to the hole wall of the drill hole 2, and grouting hole sealing is completed;
and fifthly, repeating the second step to the fourth step, arranging water-injected hole sealing capsules in the bottoms of the holes 2 of the two groups of cross-layer drill holes, changing the reading of a pressure gauge in each drill hole 2 along with the advance of the working surface, observing and recording the reading of a pressure gauge 5 connected with the hole sealing capsules 1 in each drill hole every day, and comparing the reading with 8MPa to deduce the stress distribution characteristics before mining.
According to the coal bed crustal stress test system method based on capsule pressure change, the range of a stress concentration area and a pressure relief area can be deduced according to the capsule pressure change in a drill hole; and (4) deducing the stress state of the coal body in front of the mining face parallel to the roadway direction and the stress state of the coal body perpendicular to the roadway direction through drilling holes in different directions.
Claims (4)
1. A method for testing the distribution characteristics of the pre-harvest stress based on the pressure change of a capsule is characterized in that: the used test system comprises a hole sealing capsule (1) and a push rod (3), the hole sealing capsule (1) is connected with a water injection pump (7) through a water injection pipeline (4), the water injection pump (7) is a manual hydraulic water injection pump, and a pressure gauge (5) and a switch valve (6) are respectively arranged on the water injection pipeline (4);
the method comprises the following specific steps:
constructing two groups of drill holes (2) to a coal seam at intervals along a coal seam floor roadway in front of a mining face, wherein one group of drill holes (2) are arranged at an angle of 45 degrees with the direction perpendicular to the roadway, and the other group of drill holes (2) are arranged at an angle of 45 degrees with the direction parallel to the roadway;
filling water into the hole sealing capsule (1) and the water injection pipeline (4) to realize air exhaust, and then discharging water in the hole sealing capsule (1);
connecting a water injection pipeline (4) and the hole sealing capsule (1), conveying the hole sealing capsule (1) to the bottom of the drill hole (2) by using a push rod (3), and exposing a pressure gauge (5) outside the drill hole (2) for convenient reading;
step four, opening a switch valve (6), injecting water into the hole sealing capsule (1) through a water injection pipeline (4) by using a water injection pump (7), setting the initial water injection pressure to be 5-10MPa, and expanding the hole sealing capsule (1) after injecting the water for 2 min;
recording the reading of the pressure gauge (5) at the moment when the water injection pump (7) cannot continuously inject water, closing the switch valve (6), stopping injecting water, observing the change of water pressure in the hole sealing capsule (1) through the pressure gauge (5) arranged on the water injection pipeline (4), and continuously injecting water for supplement into the hole sealing capsule (1) when the reading of the pressure gauge (5) is reduced; when the reading of the pressure gauge (5) is stable and is the same as the last recorded pressure value, the expanded hole sealing capsule (1) is tightly attached to the inner wall of the drill hole (2), then grouting hole sealing is carried out, and the length of the hole sealing section is 1/3 of the depth of the drill hole to prevent gas leakage;
and step six, repeating the step two to the step five, arranging the hole sealing capsules (1) for water injection in the hole bottoms of the two groups of drill holes (2), sealing the holes, and observing and recording the reading of a pressure gauge (5) corresponding to each drill hole (2) every day along with the advance of the working face, thereby obtaining the distribution change information of the coal bed stress in the advance of the working face.
2. The method for testing the stress distribution characteristics of the capsule based on the pressure change of the capsule according to claim 1, wherein the method comprises the following steps: the drilling depth of the drill hole (2) is determined according to the relative position of the tested coal bed and the floor roadway, and drilling is stopped 2.5m after the drill hole is drilled to meet the coal; the same group of drill holes (2) arranged in the same direction are spaced by 2-5m, the tracks are kept parallel, and the two groups of drill holes (2) in different directions are alternately arranged at equal intervals.
3. The method for testing the pre-harvest stress distribution characteristics based on capsule pressure variation according to claim 1, wherein: the pressure direction measured by the sealing capsules (1) in the drill holes (2) which are arranged at an angle of 45 degrees with the direction perpendicular to the roadway is parallel to the roadway direction, and the pressure direction measured by the sealing capsules (1) in the drill holes (2) which are arranged at an angle of 45 degrees with the direction parallel to the roadway direction is perpendicular to the roadway direction.
4. The method for testing the pre-harvest stress distribution characteristics based on capsule pressure variation according to claim 1, wherein: recording the initial pressure value after the stabilization in the fourth step as P0, in the fifth step, if the observed pressure of the hole sealing capsules (1) is greater than P0, indicating that the drill holes (2) are arranged in a stress concentration area, if the observed pressure of the hole sealing capsules (1) is less than P0, indicating that the drill holes (2) are arranged in a pressure relief area, and if the observed pressure of the hole sealing capsules (1) approaches to P0, indicating that the drill holes (2) are arranged in an original stress area; as the face progresses, three zones of locations are shifted and pressure gauge readings within each borehole are dynamically changed to infer the extent of the pressure relief and stress concentration zones and the location of stress peaks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526070.0A CN113107471B (en) | 2021-05-14 | 2021-05-14 | System and method for testing stress distribution characteristics before mining based on capsule pressure change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526070.0A CN113107471B (en) | 2021-05-14 | 2021-05-14 | System and method for testing stress distribution characteristics before mining based on capsule pressure change |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113107471A CN113107471A (en) | 2021-07-13 |
| CN113107471B true CN113107471B (en) | 2023-02-28 |
Family
ID=76722129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110526070.0A Active CN113107471B (en) | 2021-05-14 | 2021-05-14 | System and method for testing stress distribution characteristics before mining based on capsule pressure change |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113107471B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075148A (en) * | 2013-02-19 | 2013-05-01 | 中国矿业大学 | Method and device for fast measuring coal bed gas pressure through upward remote-distance hole drilling |
| CN103147741A (en) * | 2013-02-22 | 2013-06-12 | 河南理工大学 | Coal bed roadside pressure relief zone width measuring system and method based on drill hole gas leakage |
| CN203114277U (en) * | 2013-02-22 | 2013-08-07 | 河南理工大学 | Coal seam roadway pressure relief belt width measuring system based on drilling gas leakage |
| CN203476320U (en) * | 2013-09-22 | 2014-03-12 | 安徽理工大学 | Device for simultaneously determining pressure of coal bed gas through capsule grouting |
| CN106225973A (en) * | 2016-09-12 | 2016-12-14 | 山东科技大学 | Protected seam stress monitoring method based on protective coat extracted and device |
| CN106289615A (en) * | 2016-09-12 | 2017-01-04 | 山东科技大学 | A kind of protected seam monitor for stress and monitoring method |
| CN106837308A (en) * | 2017-03-29 | 2017-06-13 | 中铁十七局集团第三工程有限公司 | A kind of gas tunnel pressure tester and its method |
| CN106988738A (en) * | 2017-05-11 | 2017-07-28 | 中国矿业大学 | A kind of detection method of definitely stress distribution feature |
-
2021
- 2021-05-14 CN CN202110526070.0A patent/CN113107471B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075148A (en) * | 2013-02-19 | 2013-05-01 | 中国矿业大学 | Method and device for fast measuring coal bed gas pressure through upward remote-distance hole drilling |
| CN103147741A (en) * | 2013-02-22 | 2013-06-12 | 河南理工大学 | Coal bed roadside pressure relief zone width measuring system and method based on drill hole gas leakage |
| CN203114277U (en) * | 2013-02-22 | 2013-08-07 | 河南理工大学 | Coal seam roadway pressure relief belt width measuring system based on drilling gas leakage |
| CN203476320U (en) * | 2013-09-22 | 2014-03-12 | 安徽理工大学 | Device for simultaneously determining pressure of coal bed gas through capsule grouting |
| CN106225973A (en) * | 2016-09-12 | 2016-12-14 | 山东科技大学 | Protected seam stress monitoring method based on protective coat extracted and device |
| CN106289615A (en) * | 2016-09-12 | 2017-01-04 | 山东科技大学 | A kind of protected seam monitor for stress and monitoring method |
| CN106837308A (en) * | 2017-03-29 | 2017-06-13 | 中铁十七局集团第三工程有限公司 | A kind of gas tunnel pressure tester and its method |
| CN106988738A (en) * | 2017-05-11 | 2017-07-28 | 中国矿业大学 | A kind of detection method of definitely stress distribution feature |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113107471A (en) | 2021-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103076119B (en) | Method for measuring floor heave main control stress of laneway | |
| CN112832768B (en) | Roadway protection method based on small coal pillars | |
| CN113622913B (en) | Deformation control method for mining tunnel surrounding rock integrated with underground and up-down tunnel by full-caving method | |
| CN111878079B (en) | Method for treating gas of soft outburst coal seam of underground large mining length working face of coal mine | |
| CN104373118A (en) | Measurement method for effective extraction radius of drill hole | |
| CN106988738B (en) | Detection method for determining ground stress distribution characteristics | |
| CN102445710A (en) | Detecting drilling device for monitoring system of cover-rock water flowing fractured zone | |
| CN109596433A (en) | Crack of coal-mine roof Evolution dynamics detection device and method | |
| CN209589708U (en) | Crack of coal-mine roof Evolution dynamics detection device | |
| CN103061732A (en) | Hydraulic fracturing method of 2-3 meter hard medium sandstone stratum of roof of coal seam | |
| CN114607338A (en) | Method and device for preventing and controlling coal, rock and gas composite power disasters in underground coal mine | |
| CN113107471B (en) | System and method for testing stress distribution characteristics before mining based on capsule pressure change | |
| CN112557279A (en) | Weathered bedrock hole-fracture vertical permeability testing device and method | |
| CN111894602A (en) | Hard rock roadway tunneling method | |
| CN113738408B (en) | Expansion method for double-well communicated salt cavern gas storage | |
| CN201526309U (en) | Underground hydrological observation hole | |
| CN114486023B (en) | Three-dimensional space stress characterization method for underground engineering disturbance surrounding rock area | |
| CN214894734U (en) | Weathered bedrock hole-fracture vertical permeability testing device | |
| CN115726817B (en) | Targeted water stopping method for mountain tunnel construction | |
| CN203114277U (en) | Coal seam roadway pressure relief belt width measuring system based on drilling gas leakage | |
| Fierz et al. | Specialized instrumentation for hydromechanical measurements in deep argillaceous rock | |
| CN115977733A (en) | Surrounding rock stress-based method for measuring width of pressure relief zone of coal seam roadway | |
| Cornet | Two examples of stress measurements by the HTPF method | |
| Uglyanitsa | On the formation of a waterproofing shell around the underground structure lining in watered ground | |
| Niklasson et al. | The Sture LPG Storage Project |
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 |
Inventor after: Yang Wei Inventor after: Wang Yihan Inventor after: Xue Jiakai Inventor after: Bai Haixin Inventor after: Liang Delang Inventor after: Chen Qinghe Inventor after: Wei Zening Inventor after: Zhang Wenxiao Inventor before: Yang Wei Inventor before: Xue Jiakai Inventor before: Wang Yihan Inventor before: Bai Haixin Inventor before: Liang Delang Inventor before: Chen Qinghe Inventor before: Wei Zening Inventor before: Zhang Wenxiao |
|
| CB03 | Change of inventor or designer information |