CN115266426A - Coal roadway side part measurement-while-drilling simulation test device and coal body stress inversion method - Google Patents
Coal roadway side part measurement-while-drilling simulation test device and coal body stress inversion method Download PDFInfo
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- CN115266426A CN115266426A CN202210552529.9A CN202210552529A CN115266426A CN 115266426 A CN115266426 A CN 115266426A CN 202210552529 A CN202210552529 A CN 202210552529A CN 115266426 A CN115266426 A CN 115266426A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/023—Pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0258—Non axial, i.e. the forces not being applied along an axis of symmetry of the specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a coal roadway side measurement-while-drilling simulation test device and a coal body stress inversion method, and relates to the technical field of mining engineering. The device comprises a drilling machine system, a loading system and a data measuring system, wherein the drilling system comprises a drilling machine, a drill bit, a connecting plate, a bearing plate and an auxiliary plate, and simulated drilling of a test piece is realized; the loading system comprises a confining pressure loading mechanism and a bit pressure loading mechanism, and lateral pressures and bit pressures in different directions and different sizes are applied to the test piece; the data measuring system comprises a displacement sensor, a torque and rotating speed sensor, a data acquisition instrument and a data analyzer, and drilling parameters such as torque, rotating speed, drilling displacement and the like are comprehensively monitored. The device is used for analyzing and processing monitoring parameters after a coal roadway side measurement while drilling simulation experiment is carried out, a measurement while drilling coal body stress inversion database is established, deep learning is carried out by using a machine learning algorithm of a support vector machine, the relation between confining pressure and each drilling parameter is obtained, and the change rule of the coal body stress in the drilling process is inverted.
Description
Technical Field
The invention relates to the technical field of mining engineering, and particularly provides a coal roadway side measurement while drilling simulation test device and a coal body stress inversion method.
Background
Along with the coal resource entering deep mining, the complex geological environment of high ground stress, high osmotic pressure and high ground temperature promotes the coal rock to release a large amount of energy to induce rock burst. Research shows that coal body high stress and stress concentration play a main control role in rock burst generation, and obtaining coal body stress in real time is a key link of rock burst early warning, but the existing stress in-situ test means is difficult to meet the detection requirement of the coal body stress distribution rule.
Measurement while drilling refers to continuously monitoring information of a drill hole or a drill rig while the drill rig drills, and the coal body stress is obtained by monitoring parameters while drilling by adopting a measurement while drilling technology, so that the measurement while drilling is one of hot research directions for evaluating dangerousness of rock burst. In the prior art, measurement while drilling is mainly used for measuring the strength of a coal rock mass, measures for measuring the stress of the coal mass are few, the parameter is difficult to determine mainly by the stress of the coal mass on site, and the relationship between the stress of the coal mass and the parameter while drilling is difficult to determine by utilizing a statistical induction method. The special drilling machine for measurement while drilling disclosed in the Chinese patent (CN 102418517B) can only monitor the drilling depth and the thrust, lacks the monitoring of the torque in the drilling process, and has single judgment of drilling parameters. Chinese patent (CN 104727851B) discloses a method for evaluating surrounding rock stress of a coal mine stope, which only monitors drilling distance and drilling power, but cannot automatically obtain drilling machine parameters such as torque and thrust of a drilling machine in the drilling process, and only considers the drilling parameters to obtain energy required by breaking coal bodies, so that a large error exists.
Disclosure of Invention
In order to determine the relationship between confining pressure and various drilling parameters and invert the change rule of coal body stress in the drilling process, the invention provides a coal roadway side measurement-while-drilling simulation test device and a coal body stress inversion method, and the specific technical scheme is as follows.
A coal roadway side part measurement-while-drilling simulation test device comprises a drilling machine system, a loading system and a data measurement system, wherein the drilling machine system comprises a drilling machine, a drilling bit, a connecting plate, a bearing plate and an auxiliary plate, the drilling bit and the drilling machine are fixed through a coupler, the drilling machine is installed on the bearing plate through the connecting plate, and the auxiliary plate is arranged on the bearing plate and fixed on a support through a clamping groove; the loading system comprises a confining pressure loading mechanism and a drilling pressure loading mechanism, the confining pressure loading mechanism applies lateral pressure through an oil cylinder, and the drilling pressure loading device adjusts the drilling pressure through adjusting the weight of a weight; the data measurement system comprises a displacement sensor, a torque and rotating speed sensor, a data acquisition instrument and a data analyzer, wherein the data acquisition instrument collects monitoring data and transmits the monitoring data to the data analyzer, and the data analyzer outputs and simulates torque, rotating speed and drilling displacement in a drilling process.
Preferably, the connecting plate and the drilling machine are fixed through bolts, the connecting plate is fixedly connected with the vertical plate of the eccentric eliminating plate, the eccentric eliminating plate is integrally L-shaped, and the bearing plate is fixedly connected with the transverse plate of the eccentric eliminating plate.
Preferably, the supporting column is fixed above the confining pressure loading mechanism, a plurality of bolt holes are formed in the supporting column, and the bolt holes are matched with the clamping grooves in the bearing plate.
Preferably, one end of the displacement sensor is fixed on the auxiliary plate through a buckle, and the other end of the displacement sensor is fixed on the bearing plate to monitor the drilling depth; the torque and rotating speed sensor is arranged on the drilling machine and used for monitoring the rotating speed and the torque of the drill rod.
Preferably, the torque and rotation speed sensor is connected to the drilling machine through two couplings, the first coupling is connected with the drilling machine main body and the torque and rotation speed sensor, and the second coupling is connected with the torque and rotation speed sensor and the drilling machine power head.
Preferably, the torque and rotation speed sensor is provided with a strain bridge on the elastic shaft, the strain bridge measures an electric signal of the elastic shaft after being twisted, the electric signal passes through a signal amplifier and a pressure-frequency converter, and a converted frequency signal is transmitted to the data acquisition instrument.
It is also preferred that the data collector collects monitoring data of the displacement sensor and the torque and rotation speed sensor, and the data collector transmits the monitoring data to the data analyzer.
Still preferably, the confining pressure loading mechanism comprises a loading frame, the loading frame is square, a loading disc is arranged on each of four surfaces of the loading frame, a hydraulic cylinder is configured on each of the four surfaces of the loading frame, and the controller controls each hydraulic cylinder to load.
A coal roadway side measurement while drilling simulation test and a coal body stress inversion method are provided, the coal roadway side measurement while drilling simulation test device is utilized, and the steps comprise:
A. manufacturing a rock test piece, and placing the rock test piece in a confining pressure loading mechanism;
B. setting confining pressure loading parameters, applying confining pressure to the rock test piece, placing weights on the bearing plate, and applying set bit pressure;
C. the data measurement system monitors the drilling time, torque, rotating speed and drilling displacement data in the test process;
D. releasing the pressure of the confining pressure loading mechanism after the drilling machine is closed, and taking out the rock test piece;
E. repeating the steps A-D, and testing a plurality of rock test pieces;
F. inputting the data of drilling time, drilling pressure, confining pressure, torque, rotating speed and drilling displacement into a data analyzer, and establishing a measurement-while-drilling coal body stress inversion database by taking the rotating speed, the torque, the drilling pressure and the drilling speed as independent variables and the confining pressure as dependent variables;
G. performing deep learning on a coal body stress inversion database measured while drilling by using a machine learning algorithm of a support vector machine to obtain a relation between applied confining pressure and drilling parameters;
H. and according to the relation between the applied confining pressure and the drilling parameters, inverting and determining the confining pressure by inputting the rotating speed, the torque, the drilling pressure and the drilling speed.
Further preferably, the coal body stress is determined by using the data of the rotating speed, the torque, the bit pressure and the drilling speed of the drill hole in the actual construction process according to the relation between the applied confining pressure and the drilling parameters.
The coal roadway side measurement-while-drilling simulation test device and the coal body stress inversion method have the advantages that the coal roadway side measurement-while-drilling simulation test device simulates the influence of parameters such as drilling pressure, confining pressure, coal body strength, drill bit size and the like, so that a drilling scheme is optimized through a simulation test, and an effective basis is provided for a construction site; in addition, the simulation device can also realize constant-pressure drilling setting, and is more suitable for the construction mode of a drilling machine on a construction site. After the device is used for simulating the drilling process of a construction site, the stress change rule of the coal body of the construction site can be obtained according to the test result and the rule by analyzing the relation between the drilling parameter and the simulated confining pressure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be described in more detail below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a coal roadway side measurement-while-drilling simulation test device;
FIG. 2 is a schematic view of a mounting structure of the connection plate;
FIG. 3 is a schematic diagram of a method for coal body stress inversion;
in the figure: the device comprises a support 1, an auxiliary plate 2, a weight 3, a bearing plate 4, a back plate 5, an eccentric eliminating plate 6, a connecting plate 7, a torque rotating speed sensor 8, a confining pressure loading mechanism 9, a drill bit 10, a coupler 11, a clamping groove 12, a drilling machine 13, an eccentric weight 14 and a displacement sensor 15.
Detailed Description
With reference to fig. 1 to 3, a coal roadway side measurement-while-drilling simulation test apparatus and a coal body stress inversion method according to embodiments of the present invention will be described.
The coal roadway side measurement-while-drilling simulation test device comprises a drilling machine system, a loading system and a data measurement system, wherein the drilling machine system simulates a drilling process through the drilling machine, the loading system simulates different construction environments by applying load simulation, the data measurement system monitors and processes parameters such as torque, rotating speed, drilling displacement and load size, the simulation test device can be used for collecting drilling parameters such as torque, rotating speed and drilling displacement in the drilling process in real time, the change rule of coal body stress in the drilling process is inverted, and a basis is provided for field construction.
The drilling system comprises a drilling machine 13, a drilling bit 10, a connecting plate 7, a bearing plate 4 and an auxiliary plate 2, wherein the drilling bit 10 and the drilling machine 13 are fixed through a coupler, the drilling machine 13 drives the drilling bit 10 to rotate according to a set rotating speed, the drilling machine 13 is installed on the bearing plate through the connecting plate, and the auxiliary plate 2 is arranged on the bearing plate and fixed on different supports in four directions through clamping grooves. The connecting plate 7 and the drilling machine 13 are fixed through bolts, the connecting plate 7 is fixedly connected with a vertical plate of the eccentric eliminating plate 6, the eccentric eliminating plate 6 is integrally L-shaped, and the bearing plate 4 is fixedly connected with a transverse plate of the eccentric eliminating plate 6; the eccentricity eliminating plate 6 can also be fixedly connected with the back plate 5, and the back plate 5 is matched with the eccentricity eliminating plate 6. The supporting columns 1 are fixed above the confining pressure loading mechanism, and the four supporting columns mainly play a role in stabilizing the whole experimental device and fixing the bearing plate 4 and the auxiliary plate 2. A plurality of bolt holes are formed in the strut 1, the bolt holes are matched with the clamping grooves 12 in the bearing plate 4, and the clamping grooves 12 have the effect of limiting the bearing plate.
The loading system comprises a confining pressure loading mechanism 9 and a bit pressure loading mechanism, wherein the confining pressure loading mechanism 9 applies lateral pressure through an oil cylinder, and the bit pressure loading device adjusts the bit pressure through adjusting the weight of a weight. The weight-on-bit loading mechanism changes the weight-on-bit through the bearing plate and the weight 3 above the bearing plate, and realizes different weight-on-bit experiments through weight adjustment of the weight.
The data measurement system comprises a displacement sensor 15, a torque and rotating speed sensor 8, a data acquisition instrument and a data analyzer, wherein the data acquisition instrument collects monitoring data and transmits the monitoring data to the data analyzer, and the data analyzer outputs and simulates torque, rotating speed and drilling displacement in the drilling process. One end of a displacement sensor 15 is fixed on the auxiliary plate through a buckle, the other end of the displacement sensor is fixed on the bearing plate 4, the drilling depth is monitored, and the drilling depth of the drilling machine during working is measured by measuring the relative distance between the bearing plate 4 and the auxiliary plate 2.
A torque speed sensor 8 is provided on the drilling machine to monitor the speed and torque of the drill rod. The torque and rotation speed sensor 8 is connected to a drilling machine 13 through two couplers 11, the first coupler is connected with a drilling machine main body and the torque and rotation speed sensor, and the second coupler is connected with the torque and rotation speed sensor 8 and a drilling machine power head. The torque and rotation speed sensor 8 is provided with a strain bridge on the elastic shaft, the strain bridge measures an electric signal of the elastic shaft, the electric signal passes through a signal amplifier and a pressure frequency converter, and a converted frequency signal is transmitted to a data acquisition instrument.
The data acquisition instrument collects monitoring data of the displacement sensor and the torque and rotation speed sensor, and the data acquisition instrument transmits the monitoring data to the data analyzer. The confining pressure loading mechanism 9 comprises a loading frame, the loading frame is square, a loading disc is arranged on each of four surfaces of the loading frame, hydraulic cylinders are configured on the loading disc, and the controller controls each hydraulic cylinder to load.
The device simulates the influence of parameters such as the bit pressure, the confining pressure, the coal strength, the bit size and the like through the coal roadway side measurement-while-drilling simulation test device, so that the drilling scheme is optimized through a simulation test, and an effective basis is provided for a construction site; in addition, the simulation device can also realize constant-pressure drilling setting, and is more suitable for the construction mode of a construction site drilling machine.
When the coal roadway side measurement while drilling simulation test device is used for carrying out experiments, the assembling and testing process of the device comprises the following steps: firstly, adjusting the position of a test piece to enable the test piece to be positioned at the midpoint of a confining pressure loading mechanism, and pre-applying a small amount of confining pressure to the test piece to enable a pressure applying block in the confining pressure loading mechanism to be tightly attached to the test piece; connecting a drilling machine 13 with a torque and rotation speed sensor with a bearing plate 4 through a connecting plate 7, inserting a support column 1 into four holes of a confining pressure loading mechanism, fixing the bearing plate 4 and the drilling machine 13 on the support column 1, and installing an auxiliary plate 2 on the upper side of the bearing plate 4 and fixing the auxiliary plate on the support column 1; starting an oil cylinder of the confining pressure loading mechanism 9, applying confining pressure on a test piece through an outer oil cylinder, placing a weight 3 on the bearing plate 4, and applying drilling pressure through the weight 3 and the bearing plate 4; installing a displacement sensor 15, connecting a torque and rotating speed sensor 8, the displacement sensor 15 and a data acquisition instrument, displaying torque, rotating speed and displacement in real time, and connecting a computer to start processing software; starting the drilling machine 13, completing the drilling work by the drilling machine 13, completing the drilling parameter acquisition work by the data acquisition instrument, closing the drilling machine 13 after the drilling process is finished, releasing the pressure of the confining pressure loading mechanism 9, and taking out the test piece; and (3) taking down the drilling system and the weights 3 on the bearing plate 4 from the experiment table, disconnecting the oil cylinders of the confining pressure loading mechanism 9, moving the oil cylinders to the original positions, cleaning each experiment part, classifying and storing.
A coal roadway side measurement while drilling simulation test and a coal body stress inversion method are provided, the coal roadway side measurement while drilling simulation test device is utilized, and the steps comprise:
A. and manufacturing a rock test piece, and placing the rock test piece in the confining pressure loading mechanism.
Wherein can make the rock test piece of multiple different lithologies, different grade type according to experimental purpose, can also directly follow the job site sample preparation rock test piece for the experimental result accords with engineering reality more. The size of the rock test piece is determined according to the size of the confining pressure loading mechanism, and the length of the rock test piece can be equal to the length of the drill rod to the maximum extent.
B. Setting confining pressure loading parameters, applying confining pressure on the rock test piece, and applying set drilling pressure after weights are placed on the bearing plate.
The controller controls the confining pressure loading mechanism to apply load to the test piece, and the test piece is directly connected with the loading block of the confining pressure loading mechanism, so that the test piece is uniformly pressed, and the confining pressure monitoring accuracy is ensured. The confining pressure loading mechanism can apply lateral pressure of different directions and different sizes to the test piece by controlling the hydraulic oil cylinder.
C. The data measurement system monitors the drilling time, torque, rotating speed and drilling displacement data in the test process, and the data acquisition unit is used for collecting the monitoring data respectively.
D. And (4) releasing the pressure of the confining pressure loading mechanism after the drilling machine is closed, and taking out the rock test piece. The test was completed for 1 rock specimen.
E. And D, repeating the steps A-D, and testing a plurality of rock test pieces. The method is used for testing the rock test pieces of the same kind respectively, and can be used for testing the rock test pieces under the same confining pressure condition by taking the rotating speed, the torque, the bit pressure and the drilling speed as convenience, and can also be used for testing the rock test pieces of different types by taking the confining pressure condition as a variable. Similar lithology in the region or the corresponding confining pressure relation of different drilling conditions under the similar stress condition is known through a simulation test, so that the relation among the accurate rotating speed, torque, drilling pressure, drilling speed and confining pressure is established, further, the geostress can be synchronously and accurately measured during drilling, and a mine pressure monitoring method is improved.
F. Inputting the data of drilling time, drilling pressure, confining pressure, torque, rotating speed and drilling displacement into a data analyzer, and establishing a measurement-while-drilling coal body stress inversion database by taking the rotating speed, the torque, the drilling pressure and the drilling speed as independent variables and the confining pressure as dependent variables;
G. and performing deep learning on the coal body stress inversion database measured while drilling by using a machine learning algorithm of a support vector machine to obtain the relation between the applied confining pressure and the drilling parameters.
The built while-drilling measurement coal body stress inversion database mainly comprises the rotating speed, the torque, the applied bit pressure, the confining pressure and the drilling speed of the drilling machine, wherein the rotating speed, the torque, the bit pressure and the drilling speed are independent variables, the confining pressure is a dependent variable, the relation between four parameters of the rotating speed, the torque, the bit pressure and the drilling speed and the confining pressure is obtained by MATLAB software through a machine learning algorithm of a support vector machine, and other rotating speed, torque, bit pressure and drilling speed are input by the obtained relation, so that the coal body stress corresponding to the rotating speed, the torque, the bit pressure and the drilling speed can be obtained.
H. And (4) according to the relation between the applied confining pressure and the drilling parameters, inputting the rotating speed, the torque, the drilling pressure and the drilling speed to perform inversion to determine the confining pressure.
In addition, according to the relation between the applied confining pressure and the drilling parameters, the coal body stress is determined by utilizing the data of the rotating speed, the torque, the drilling pressure and the drilling speed of the drilling hole in the actual construction process.
After the device is used for simulating the drilling process of a construction site, the stress change rule of the coal body of the construction site can be obtained according to the test result and the rule by analyzing the relation between the drilling parameter and the simulated confining pressure.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. A coal roadway side part measurement-while-drilling simulation test device is characterized by comprising a drilling machine system, a loading system and a data measurement system, wherein the drilling machine system comprises a drilling machine, a drill bit, a connecting plate, a bearing plate and an auxiliary plate, the drill bit and the drilling machine are fixed through a coupler, the drilling machine is installed on the bearing plate through the connecting plate, and the auxiliary plate is arranged on the bearing plate and fixed on a strut through a clamping groove; the loading system comprises a confining pressure loading mechanism and a drilling pressure loading mechanism, the confining pressure loading mechanism applies lateral pressure through an oil cylinder, and the drilling pressure loading device adjusts the drilling pressure through adjusting the weight of a weight; the data measurement system comprises a displacement sensor, a torque and rotating speed sensor, a data acquisition instrument and a data analyzer, wherein the data acquisition instrument collects monitoring data and transmits the monitoring data to the data analyzer, and the data analyzer outputs and simulates torque, rotating speed and drilling displacement in a drilling process.
2. The coal roadway side measurement-while-drilling simulation test device according to claim 1, wherein the connecting plate and the drilling machine are fixed through bolts, the connecting plate is fixedly connected with a vertical plate of an eccentric elimination plate, the eccentric elimination plate is integrally L-shaped, and a bearing plate is fixedly connected with a transverse plate of the eccentric elimination plate.
3. The coal roadway side measurement-while-drilling simulation test device of claim 1, wherein the support column is fixed above the confining pressure loading mechanism, a plurality of bolt holes are formed in the support column, and the bolt holes are matched with clamping grooves in the bearing plate.
4. The coal roadway side measurement-while-drilling simulation test device of claim 1, wherein one end of the displacement sensor is fixed on the auxiliary plate through a buckle, and the other end of the displacement sensor is fixed on the bearing plate to monitor the drilling depth; the torque and rotating speed sensor is arranged on the drilling machine and used for monitoring the rotating speed and the torque of the drill rod.
5. The coal roadway wall measurement-while-drilling simulation test device of claim 1, wherein the torque and rotation speed sensor is connected to the drilling machine through two couplings, the first coupling is connected with the drilling machine main body and the torque and rotation speed sensor, and the second coupling is connected with the torque and rotation speed sensor and the drilling machine power head.
6. The coal roadway wall measurement-while-drilling simulation test device according to claim 1, wherein the torque and rotation speed sensor is provided with a strain bridge on the elastic shaft, the strain bridge measures an electric signal of the elastic shaft, the electric signal passes through a signal amplifier and a pressure-frequency converter, and a converted frequency signal is transmitted to a data acquisition instrument.
7. The coal roadway side measurement-while-drilling simulation test device according to claim 1, wherein the data acquisition instrument collects monitoring data of a displacement sensor and a torque and rotation speed sensor, and the data acquisition instrument transmits the monitoring data to the data analyzer.
8. The coal roadway side measurement-while-drilling simulation test device according to claim 1, wherein the confining pressure loading mechanism comprises a loading frame, the loading frame is square, a loading disc is arranged on each of four sides of the loading frame, a hydraulic cylinder is arranged on each of the four sides of the loading frame, and the controller controls each hydraulic cylinder to load.
9. A coal roadway side measurement-while-drilling simulation test and a coal body stress inversion method are provided, the coal roadway side measurement-while-drilling simulation test device is used, and the coal roadway side measurement-while-drilling simulation test device is characterized by comprising the following steps:
A. manufacturing a rock test piece, and placing the rock test piece in a confining pressure loading mechanism;
B. setting confining pressure loading parameters, applying confining pressure to the rock test piece, placing weights on the bearing plate, and applying set bit pressure;
C. the data measurement system monitors the drilling time, torque, rotating speed and drilling displacement data in the test process;
D. releasing the pressure of the confining pressure loading mechanism after the drilling machine is closed, and taking out the rock test piece;
E. repeating the steps A-D, and testing a plurality of rock test pieces;
F. inputting the data of drilling time, drilling pressure, confining pressure, torque, rotating speed and drilling displacement into a data analyzer, and establishing a measurement-while-drilling coal body stress inversion database by taking the rotating speed, the torque, the drilling pressure and the drilling speed as independent variables and the confining pressure as dependent variables;
G. performing deep learning on a while-drilling measurement coal body stress inversion database by using a machine learning algorithm of a support vector machine to obtain a relation between applied confining pressure and drilling parameters;
H. and according to the relation between the applied confining pressure and the drilling parameters, inverting and determining the confining pressure by inputting the rotating speed, the torque, the drilling pressure and the drilling speed.
10. The coal roadway side measurement-while-drilling simulation test and coal body stress inversion method as claimed in claim 9, wherein coal body stress is determined by using data of rotation speed, torque, drilling pressure and drilling speed of drilling in an actual construction process according to a relation between applied confining pressure and drilling parameters.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210552529.9A CN115266426A (en) | 2022-05-19 | 2022-05-19 | Coal roadway side part measurement-while-drilling simulation test device and coal body stress inversion method |
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| CN202210552529.9A CN115266426A (en) | 2022-05-19 | 2022-05-19 | Coal roadway side part measurement-while-drilling simulation test device and coal body stress inversion method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115598730A (en) * | 2022-11-28 | 2023-01-13 | 云南玉临高速公路建设有限责任公司（Cn） | Rock mass ground stress measuring method and system based on drilling energy analysis |
| CN116838317A (en) * | 2023-06-30 | 2023-10-03 | 陕煤集团神木张家峁矿业有限公司 | Three-dimensional dynamic loading device for simulating underground rock burst and rock burst prediction method |
-
2022
- 2022-05-19 CN CN202210552529.9A patent/CN115266426A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115598730A (en) * | 2022-11-28 | 2023-01-13 | 云南玉临高速公路建设有限责任公司（Cn） | Rock mass ground stress measuring method and system based on drilling energy analysis |
| CN116838317A (en) * | 2023-06-30 | 2023-10-03 | 陕煤集团神木张家峁矿业有限公司 | Three-dimensional dynamic loading device for simulating underground rock burst and rock burst prediction method |
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