CN105547721B - Double-end sealing leak detection integration observation procedure - Google Patents
Double-end sealing leak detection integration observation procedure Download PDFInfo
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- CN105547721B CN105547721B CN201510907628.4A CN201510907628A CN105547721B CN 105547721 B CN105547721 B CN 105547721B CN 201510907628 A CN201510907628 A CN 201510907628A CN 105547721 B CN105547721 B CN 105547721B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/12—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ
- F16L55/128—Means for stopping flow from or in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of integrated observation procedure of double-end sealing leak detection, its observation system used includes plugging system, guidance system, supply propulsion system and pressure conversion system；Plugging system includes communicating pipe, unit and the second closure unit is blocked positioned at the first of communicating pipe two ends, first closure unit is close to the inner side of rock body drilled, closure unit includes leak pipe, the tubular configured joint for being connected to leak pipe two ends and closure capsule, pressure conversion system includes hydraulic pressure converter and neck pipe joint, hydraulic pressure converter includes piston and matrix two parts, the area of piston left side, which is more than in the area of right side, piston, is provided with interconnected water-guiding hole.The cooperation that the present invention passes through plugging system and pressure conversion system, realize and water source is blocked in integrated process to observation water source pressure conversion, solve and water source and observation water source work problem under respective pressure are blocked in observation process, it is to avoid destruction of the observation water source hypertonia to borehole fissure.
Description
Technical field
The present invention relates to mine roof and floor rock mass damage scope determination techniques field, and in particular to a kind of double-end sealing leak detection
Integrated observation procedure.
Background technology
The measurement of mine roof and floor rock mass damage scope is the important parameter for indicating coal petrography occurrence status.Prevent in research mine
When harnessing the river, it is a critical underlying parameter, therefore, and the formation of conduit pipe in country rock is adopted in research, it is therefore necessary to
Grasp strata movement rule and determine roof and floor rock mass damage scope.It is generally estimated, live real using numerical simulation, empirical equation
The means such as survey.
However, because field condition is complicated, to a certain extent, numerical simulation can not reflect field condition well, warp
Test that the estimated blindness of formula is larger, with deep increasing is adopted, empirical equation applicability is worse and worse.Due to existing scope
In work simultaneously number of tubes it is excessive, especially in progradation, easily there is drilling interior conduit winding problem, in addition,
During actual observation, closure pressure typically takes 2.5MPa, and drilling observation hydraulic pressure typically takes observation water source pressure in 0.1MPa, drilling
Power can not be excessive, otherwise, can be to preexisting crack formation dilating effect in borehole wall.Under same external source, one how is allowed
Block water source in body scope to work simultaneously under respective pressure with observation water source, prior art fails while solving above-mentioned
Two problems.
The content of the invention
It is an object of the invention to provide a kind of integrated observation procedure of double-end sealing leak detection, the observation procedure can be simultaneously
Realize that closure is leaked hunting integration, reduce in drilling while the number of tubes of work, and can complete closure leak hunting integration and
Pressure conversion from blocking high-pressure water source to observation low pressure water source.
Its technical solution includes：
A kind of closure for mine roof and floor rock mass is leaked hunting integrated observation procedure, and its observation system used includes
Plugging system, guidance system, supply propulsion system and pressure conversion system；
The plugging system includes communicating pipe, unit and the second closure unit, institute is blocked positioned at the first of communicating pipe two ends
The first closure unit is stated close to the inner side of rock body drilled, the closure unit includes leak pipe, is connected to the pipe at leak pipe two ends
Straight coupling and closure capsule；
The pressure conversion system includes hydraulic pressure converter and neck pipe joint, and the hydraulic pressure converter includes piston and base
Body two parts, the area of the piston left side, which is more than in the area of right side, the piston, is provided with interconnected water guide
Hole；
The guidance system includes guide cone；
The observation procedure comprises the following steps：
A drillings, constructed in coal petrography tunnel into top plate or floor rock 2 of predetermined angular drillings, hole depth 30-
70m；
B installs observation system, is directed to cone and is arranged on the tubular configured joint of the first closure unit header, single in the first closure
Closure capsule is installed in leak pipe periphery between member and second closure two tubular configured joints of unit, and hydraulic pressure converter is passed through into neck
Pipe joint is connected with the tubular configured joint of the first closure unit tail, and the water-guiding hole in piston positioned at right-hand member is passed through into aperture and neck
Pipe joint is connected, and will be sealed positioned at the water-guiding hole of left end by matrix, and the two ends of communicating pipe are blocked by tubular configured joint by first
Unit and the second closure unit connection, supply propulsion system is connected with communicating pipe；
C closing drillings, after it reach initial position, water source are injected into observation system with water flood operations platform and is reached to it
Predetermined initial water pressure, plays swollen closure capsule sealing drilling；
D determines flowing water vector parameters, after after stable water pressure, waits 1-2 minutes, reads the total flow in this time, remembers
Record and flow value in the unit of account time；
E withdraws pressure water source, closure capsule is in depressurization phase, then using rig and drilling rod mobile observation system extremely
Next observation hole section, repeat step c, d is measured to drilling successively.
The advantageous effects that above-mentioned technical proposal is directly brought are：
Piston is in the anisometric cylinder in left and right ends, and the larger cylinder piston area area of left end is SOutside, contact hydraulic pressure
For POutside, the less cylinder piston area area of right-hand member is SIt is interior, contact hydraulic pressure is PIt is interior.There is boss setting close to the right-hand member of piston,
Coordinated by spring and intrinsic silicon corresponding site, it is ensured that matrix will not be departed from while piston is moved in matrix.In piston
Interconnected water-guiding hole is provided with, is connected positioned at right-hand member water-guiding hole by aperture with neck pipe joint, positioned at left end water guide
By matrix inner wall sealing when hole starts, when piston stretches out matrix more than a certain position to the left, left end water-guiding hole is connected with drilling.
Hydraulic pressure converter operation principle is：
The larger cylinder piston area area of left end is SOutside, contact hydraulic pressure is drilling observation hydraulic pressure POutside, the less circle of right-hand member
Cylinder piston area area is SIt is interior, contact hydraulic pressure is PIt is interior, coefficient of elasticity k, decrement x in spring, from balance between two forces principle：
Work as FOutside+FBullet≥FIt is interior, i.e. POutsideSOutside+kx≥PIt is interiorSIt is interior, then hydraulic pressure converter be closed, piston is not outer to be moved, water guide
Hole is stopped by matrix inwall, it is impossible to connected with drilling.
Work as FOutside+FBulletF≤FIt is interior, i.e. POutsideSOutside+kx≤PIt is interiorSIt is interior, then hydraulic pressure converter is in opening, and piston is moved out, water guide
Matrix inwall is exposed in hole, is connected with drilling, to carrying out moisturizing in drilling.
Said process can both have been realized (refers to brill laterally by interior survey (referring to closure capsule) blocking high-pressure water (generally 2.5MPa)
In hole) observation low pressure water (0.1MPa) conversion, the process of moisturizing in real time in drilling can be realized as needed again.
Wherein, POutsideFor observation hydraulic pressure, engineering often takes 0.1MPa, PIt is interiorTo play swollen closure capsule hydraulic pressure, work in plugging system
Journey often takes 2.5MPa, it follows that SOutsideWith SIt is interiorRatio be about 10~25:1, it is contemplated that area difference is too big, therefore add spring
It is adjusted, one is that can reduce inside and outside area ratio, is easy to actual manufacture needs, two be that can make piston can self-return.
As the preferred scheme of the present invention, the right-hand member of piston is provided with boss, the boss is used in piston
Spring carry out spacing, the piston is to control the water-guiding hole of left end and drilling in country rock to keep connecting or closing.
As another preferred scheme of the present invention, vertically upward and vertically downward convex is provided with the tubular configured joint
The portion of rising, the closure capsule is wrapped in the leak pipe periphery of two lug bosses.
It is preferred that, set fluted on the tubular configured joint of leak pipe side away from lug boss certain distance, it is described recessed
Groove is fixed the closure capsule by coordinating with fixture.
It is preferred that, two leaking holes are laid with every section of leak pipe.
It is preferred that, the communicating pipe is to be threadedly coupled with tubular configured joint.
It is preferred that, when piston meets POutsideSOutside+kx≤PIt is interiorSIt is interiorWhen, left end water-guiding hole is connected with the drilling in country rock, wherein, POutside
For observation hydraulic pressure, PIt is interiorTo play swollen closure capsule hydraulic pressure, S in plugging systemOutsideFor left end piston area area, SIt is interiorFor right-hand member piston area
Area, k is coefficient of elasticity in spring, and x is decrement.
It is preferred that, the supply propulsion system includes water flood operations platform, pressure of return water table, electronic logger, rig and brill
Bar, the water flood operations platform provides high-pressure water into the communicating pipe, and the electronic logger is installed on water flood operations platform, institute
Stating pressure of return water table is used to be corrected detection to the pressure of return water in return pipe.
It is preferred that, the area of the piston left side and the area ratio of right side are 10~25:1.
Compared with prior art, advantageous effects of the invention are：
1st, the closure for realizing observation system is leaked hunting integration, is reduced in drilling while the number of tubes of work, is solved
Multi-pipeline mutually winds problem in being drilled in progradation.
2nd, by the cooperation of plugging system and pressure conversion system, realize and water source is blocked in integrated process to observation water
Source pressure conversion, solves and water source and observation water source work problem under respective pressure is blocked in observation process, it is to avoid observation
The too high destruction to borehole fissure of source pressure.
3rd, the stability and accuracy of mine roof and floor rock mass damage scope measurement process are improved, it is to avoid observation water source
Destruction of the hypertonia to borehole fissure, is the stability and accuracy of mine roof and floor rock mass damage scope measurement process
Lay the foundation.
Brief description of the drawings
The present invention is elaborated below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation of observation system of the present invention；
Fig. 2 is test probe overall schematic in observation system of the present invention；
Fig. 3 is the structural representation of the first closure unit in observation system of the present invention；
Fig. 4 is the structural representation of the second closure unit in observation system of the present invention；
Fig. 5, Fig. 6 are pressure conversion system structure diagram；
Fig. 7,8 are hydraulic pressure converter structure schematic diagram；
Fig. 9,10 are neck pipe joint structure schematic diagram of the present invention；
Figure 11 is pressure conversion system reclaimed water pressure converter view of the present invention；
Figure 12 is guide cone structural representation in observation system of the present invention；
In figure, 1, rock mass, 2, drilling, 3, closure capsule, 4, communicating pipe, 5, hydraulic pressure converter, 6, tubular configured joint one, 7, leakage
Water pipe, 8, neck pipe joint, 9, tubular configured joint three, 10, high-pressure hose, 11, drilling rod, 12, rig, 13, water flood operations platform, 14,
Guide cone, 15, tubular configured joint two, 16, piston, 17, water-guiding hole, 18, spring, 19, boss, 20, matrix, 21, aperture.
Embodiment
The present invention proposes a kind of integrated observation procedure of double-end sealing leak detection, in order that advantages of the present invention, technical side
Case is clearer, clear and definite, and further clear, complete explanation is done to the present invention with reference to specific embodiment.
The observation system that observation procedure of the present invention is used, with reference to shown in Fig. 1 to Fig. 8, it includes plugging system, pressure and turned
System, guidance system and supply propulsion system are changed, wherein, supply propulsion system is detailed as shown in Figure 1, including water flood operations platform 13,
Drilling rod 11, rig 12, wherein, water flood operations platform 13 is responsible for providing fixation pressure water source, passes through high-pressure hose 10, drilling rod 11 and one
Body observation system is connected, and rig 12 is responsible for propelling integrated observation system to corresponding observation area, and water flood operations platform 13 is wrapped
Flowmeter, pressure gauge are included, observation injection flow and water injection pressure is respectively used to, rig 12 is responsible for propelling integrated observation system extremely
Corresponding observation area, the work operation method reference prior art for supply propulsion system and observation system is that can be achieved.
Plugging system is referred to shown in Fig. 1 to Fig. 4, including communicating pipe 4 and positioned at the two ends of communicating pipe 4 first closure unit and
Second closure unit, the first closure unit is located remotely from rock body drilled in the most inner side close to rock body drilled, the second closure unit
Side, wherein, the second closure unit includes two tubular configured joints 1, leak pipe 7 and closure capsule 3, and the first closure unit includes
Tubular configured joint 2 15, leak pipe 7, tubular configured joint 39 and closure capsule 3；Communicating pipe 4 is a sealing pipeline, and its left end passes through pipe
Straight coupling 1 is threaded with the second closure unit, and its right-hand member is in screw thread with the first closure unit by pressure conversion system
Connection.
The two ends of leak pipe 7 in second closure unit are threaded with two tubular configured joints 1 respectively, on leak pipe 7
Have two leaking holes, the outside of tubular configured joint 1 sets convex architecture and groove, wherein, convex architecture can for vertically upward and
Lug boss vertically downward, or the other lug bosses similar with the structure, the effect of lug boss are to block closure capsule 3, to prevent
Slide, the effect of groove is can be fixed thereon closure capsule 3 by fixing component.Wherein, convex architecture is to block closure
Capsule 3, with anti-slip, closure capsule 3 can be fixed thereon by groove by fixing component, and closure capsule 3 surrounds two tubuloses
In the groove-like structure of joint 1, by the space that swollen closure capsule 3 has been cooperatively formed with leak pipe 7.
The left and right ends of leak pipe 7 connect with tubular configured joint 2 15, tubular configured joint 39 in screw thread respectively in first closure unit
Connect, tubular configured joint 25, the outside of tubular configured joint 39 set groove-like structure, closure capsule 3, closure can be fixed by fixing component
Capsule 3 surrounds tubular configured joint 2 15, the outside of tubular configured joint 39 and set in groove-like structure, by being cooperatively formed with leak pipe 7
Play the space of swollen closure capsule 3.
Communicating pipe 4 only has one, blocks unit and the second envelope by tubular configured joint 1, neck pipe joint 8 and first respectively
Stifled unit threaded connection.
Pressure conversion system is referred to shown in Fig. 5 to Figure 11, including hydraulic pressure converter 5 and neck pipe joint 8；Neck pipe joint
8 left ends are threadedly coupled with communicating pipe 4, and right-hand member is threadedly coupled with tubular configured joint 2 15, the left side exterior lateral area of neck pipe joint 8 with
4 hydraulic pressure converters 5 are threaded.
Hydraulic pressure converter 5 includes piston 16 and the two parts of matrix 20, and piston 16 is in the anisometric cylinder in left and right ends, left
The larger face area of cylinder piston 16 in end is SOutside, contact hydraulic pressure is POutside, the less face area of cylinder piston 16 of right-hand member is SIt is interior,
Contact hydraulic pressure is PIt is interior.Right-hand member close to piston 16 has a boss 19 to set, and is matched somebody with somebody by spring 18 with the inside corresponding site of matrix 20
Close, it is ensured that will not depart from while piston 16 is moved in matrix 20 in matrix 20, piston 16 and be provided with interconnected water guide
Hole 17, right-hand member water-guiding hole 17 is connected by aperture 21 with neck pipe joint 8, by the inwall of matrix 20 when left end water-guiding hole 17 starts
Sealing, when piston 16 stretches out matrix more than a certain position to the left, left end water-guiding hole 17 is connected with drilling 2.
The above-mentioned operation principle of hydraulic pressure converter 5 is：
The larger face area of cylinder piston 16 of left end is SOutside, contact hydraulic pressure is the observation hydraulic pressure of drilling 2 POutside, right-hand member is less
The face area of cylinder piston 16 is SIt is interior, contact hydraulic pressure is II type closure end section closure hydraulic pressure PIt is interior, coefficient of elasticity k in spring 18, pressure
Contracting amount x, from balance between two forces principle：
Work as FOutside+FBullet≥FIt is interior, i.e. POutsideSOutside+kx≥PIt is interiorSIt is interior, then hydraulic pressure converter 5 be closed, piston 16 is not outer to be moved, and is led
Water hole 17 is stopped by the inwall of matrix 20, it is impossible to connected with drilling 2.
Work as FOutside+FBulletF≤FIt is interior, i.e. POutsideSOutside+kx≤PIt is interiorSIt is interior, then hydraulic pressure converter 5 is in opening, and piston 16 is moved out,
Water-guiding hole 17 exposes the inwall of matrix 20, is connected with drilling 2, to carrying out moisturizing in drilling 2.
Said process can both have been realized (to be referred to laterally by interior survey (referring to closure capsule 3) blocking high-pressure water (generally 2.5MPa)
In drilling 2) observation low pressure water (0.1MPa) conversion, the process of moisturizing in real time in drilling 2 can be realized as needed again.
Wherein, POutsideFor observation hydraulic pressure, engineering often takes 0.1MPa, PIt is interiorTo play the swollen closure hydraulic pressure of capsule 3, work in plugging system
Journey often takes 2.5MPa, it follows that SOutsideWith SIt is interiorRatio be about 25:1, it is contemplated that area difference is too big, therefore add spring 18 and enter
Row regulation, one is that can reduce inside and outside area ratio, is easy to actual manufacture needs, two be that can make piston 16 can self-return.
Guidance system is referred to shown in Fig. 1 and Figure 12, including guide cone 14, is threaded with tubular configured joint 39, guide cone
14 be a conical structure, when being easy to occur uneven step-like in drilling 2, plays guide effect.
The observation procedure of double-end sealing leak detection combined geometry of the present invention is elaborated below, key step bag
Include：
(1) drilling 2：Successively constructed into top plate or floor rock 1 in coal petrography tunnel with conventional coal mine drilling machine 12
Predetermined angular drills 2, and hole depth reaches 30-70m；
(2) observation system is installed：Debris in cleaning drilling 2, installs observation system in drilling 2, passes through high-pressure hose
10 corresponding pipelines connection rig 12, water flood operations platform 13 etc., and it is sent to 2 initial bits of drilling using rig 12 and drilling rod 11
Put；
(3) closing drilling 2：After it reaches initial position, swollen closure capsule 3 sealing drilling 2 is played, that is, uses water flood operations platform
13 into the first index unit and the second closure unit the water source of injection fixation pressure reach predetermined hydraulic pressure to it；
(4) flowing water vector parameters are determined：After closure is qualified, flowing water vector parameters measure is carried out, i.e., after stable water pressure, is waited
1-2 minutes, the total flow in this time is read, is recorded and flow value in the unit of account time；
(5) pressure water source is withdrawn, closure capsule 3 is in depressurization phase, is then seen using rig 12 and the movement of drilling rod 11
Examining system to next observation hole section, repeat step 3 to step 4 is measured to drilling 2 successively.
The part do not addressed in the present invention uses or used for reference prior art and can be achieved.
Although more herein used the terms such as hydraulic pressure converter, neck pipe joint, it is not precluded from using
The possibility of other terms, the simple replacement that those skilled in the art are done under the enlightenment of the present invention to these terms, all should
Within protection scope of the present invention.
Claims (9)
- The integrated observation procedure 1. a kind of closure for mine roof and floor rock mass is leaked hunting, it is characterised in that：Its sight used Examining system includes plugging system, guidance system, supply propulsion system and pressure conversion system；The plugging system includes communicating pipe, unit and the second closure unit, described the is blocked positioned at the first of communicating pipe two ends One closure unit includes leak pipe, connection close to the inner side of rock body drilled, the first closure unit and the second closure unit Tubular configured joint and closure capsule at leak pipe two ends；The pressure conversion system includes hydraulic pressure converter and neck pipe joint, and the hydraulic pressure converter includes piston and matrix two Part, the area of the piston left side, which is more than in the area of right side, the piston, is provided with interconnected water-guiding hole；The guidance system includes guide cone；The observation procedure comprises the following steps：A drillings, constructed in coal petrography tunnel into top plate or floor rock 2 of predetermined angular drillings, hole depth 30-70m；B install observation system, be directed to cone be arranged on first closure unit header tubular configured joint on, first closure unit and Closure capsule is installed in leak pipe periphery between second closure two tubular configured joints of unit, and hydraulic pressure converter is connect by neck pipe Head is connected with the tubular configured joint of the first closure unit tail, and the water-guiding hole in piston positioned at right-hand member is connect by aperture with neck pipe Head is connected, and will be sealed positioned at the water-guiding hole of left end by matrix, and the two ends of communicating pipe block unit by tubular configured joint by first With the second closure unit connection, supply propulsion system is connected with communicating pipe；C closing drillings, after it reaches initial position, injected with water flood operations platform into observation system water source reached to it is predetermined Initial water pressure, plays swollen closure capsule sealing drilling；D determines flowing water vector parameters, after after stable water pressure, waits 1-2 minutes, reads the total flow in this time, record is simultaneously Flow value in the unit of account time；E withdraws pressure water source, closure capsule is in depressurization phase, then using rig and drilling rod mobile observation system to next Hole section is observed, repeat step c, d is measured to drilling successively.
- The integrated observation procedure 2. the closure according to claim 1 for mine roof and floor rock mass is leaked hunting, its feature exists In：The right-hand member of piston is provided with boss, the boss is spacing for being carried out to the spring in piston, and the piston is to control The water-guiding hole of left end keeps connecting or closing with the drilling in country rock.
- The integrated observation procedure 3. the closure according to claim 1 for mine roof and floor rock mass is leaked hunting, its feature exists In：Lug boss vertically upward and vertically downward is provided with the tubular configured joint, the closure capsule is wrapped in two projections The leak pipe periphery in portion.
- The integrated observation procedure 4. the closure according to claim 3 for mine roof and floor rock mass is leaked hunting, its feature exists In：Set fluted on the tubular configured joint of leak pipe side away from lug boss certain distance, the groove by with fixation Part, which coordinates, fixes the closure capsule.
- The integrated observation procedure 5. the closure according to claim 1 for mine roof and floor rock mass is leaked hunting, its feature exists In：Two leaking holes are laid with every section of leak pipe.
- The integrated observation procedure 6. the closure according to claim 1 for mine roof and floor rock mass is leaked hunting, its feature exists In：The communicating pipe is to be threadedly coupled with tubular configured joint.
- The integrated observation procedure 7. the closure according to claim 1 for mine roof and floor rock mass is leaked hunting, its feature exists In：When piston meets POutsideSOutside+kx≤PIt is interiorSIt is interiorWhen, left end water-guiding hole is connected with the drilling in country rock, wherein, POutsideTo observe hydraulic pressure, PIt is interiorTo play swollen closure capsule hydraulic pressure, S in plugging systemOutsideFor left end piston area area, SIt is interiorFor right-hand member piston area area, k is bullet Coefficient of elasticity in spring, x is decrement.
- The integrated observation procedure 8. the closure according to claim 1 for mine roof and floor rock mass is leaked hunting, its feature exists In：The supply propulsion system includes water flood operations platform, pressure of return water table, electronic logger, rig and drilling rod, the water filling behaviour Make platform and high-pressure water is provided into the communicating pipe, the electronic logger is installed on water flood operations platform, the pressure of return water table For being corrected detection to the pressure of return water in return pipe.
- The integrated observation procedure 9. the closure according to claim 1 for mine roof and floor rock mass is leaked hunting, its feature exists In：The area of the piston left side and the area ratio of right side are 10~25:1.
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| CN201510907628.4A CN105547721B (en) | 2015-12-09 | 2015-12-09 | Double-end sealing leak detection integration observation procedure |
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| CN109975125A (en) * | 2019-03-11 | 2019-07-05 | 山东科技大学 | The pressure water experimental facilities and method detected based on coal body or rock-mass relaxing circle |
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