CN-122021361-A - Real-time measurement method and system for wear value of spherical tooth drill bit of down-the-hole drill

CN122021361ACN 122021361 ACN122021361 ACN 122021361ACN-122021361-A

Abstract

The invention relates to the technical field of down-the-hole drill button bit abrasion measurement, in particular to a real-time measurement method and a real-time measurement system for the abrasion value of a down-the-hole drill button bit, wherein an initial three-dimensional model is optimized and registered to obtain the integral abrasion quantized value of the down-the-hole drill button bit; the method comprises the steps of analyzing mapping relation between drilling parameters and integral abrasion quantized values, constructing a database between the drilling parameters and drill bit abrasion values, deducing dimensionless variables according to a dimensionality analysis method and the database, carrying out combination screening with a second-order polynomial and cross terms, determining dimensionless variable combinations influenced by drill bit abrasion, substituting the dimensionless variable combinations into a multiple linear regression model, establishing a mathematical relation model between drill bit abrasion and the drilling parameters, and realizing real-time measurement of the drill bit abrasion values of the spherical teeth of the down-the-hole drill. According to the invention, dimensionless variable of the while-drilling parameter is obtained based on dimensional analysis, and the abrasion value of the spherical tooth bit of the down-the-hole drill is measured in real time by combining a multiple linear regression construction model, so that the construction efficiency and the safety are improved.

Inventors

LI XIANGLONG
Xie Keyao
WANG JIANGUO
HU TAO
ZHAO ZEHU
Huan Baoqian

Assignees

昆明理工大学

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (10)

1. The real-time measurement method for the wear value of the spherical tooth drill bit of the down-the-hole drill is characterized by comprising the following steps: constructing an initial three-dimensional model of the down-the-hole drill button bit based on full-size three-dimensional laser scanning information, optimizing and registering the initial three-dimensional model, and obtaining an overall abrasion quantized value of the down-the-hole drill button bit; acquiring a drilling parameter of a spherical tooth drill bit of a down-the-hole drill, analyzing a mapping relation between the drilling parameter and the integral abrasion quantized value, and constructing a database between the drilling parameter and the drill abrasion value according to the mapping relation; Deducing dimensionless variables according to a dimensionless analysis method and the database, introducing a second-order polynomial and a cross term to carry out combined screening on the dimensionless variables, and determining dimensionless variable combinations influenced by drill bit abrasion; Substituting the dimensionless variable combination into a multiple linear regression model, establishing a mathematical relation model between drill bit abrasion and drilling parameters, and realizing real-time measurement of the drill bit abrasion value of the spherical teeth of the down-the-hole drill by using the mathematical relation model.
2. The method for real-time measurement of the wear value of the button bit of the down-the-hole drill according to claim 1, wherein the constructing an initial three-dimensional model of the button bit of the down-the-hole drill based on full-size three-dimensional laser scanning information, optimizing and registering the initial three-dimensional model and obtaining the overall wear quantized value of the button bit of the down-the-hole drill comprises: Carrying out full-size three-dimensional laser scanning on the spherical tooth drill bit of the down-the-hole drill after each drilling by adopting a handheld three-dimensional laser scanning device so as to obtain full-size three-dimensional laser scanning information; constructing an initial three-dimensional model of the spherical tooth drill bit of the down-the-hole drill based on the full-size three-dimensional laser scanning information; cutting and optimizing the initial three-dimensional model to obtain an effective three-dimensional drill bit model; And selecting a three-dimensional model of the standard button bit of the same model, and registering and aligning the effective three-dimensional model of the button bit with the three-dimensional model of the standard button bit of the same model to obtain a three-dimensional model of the target bit.
3. The method for real-time measurement of the wear value of the button bit of the down-the-hole drill according to claim 2, wherein the constructing an initial three-dimensional model of the button bit of the down-the-hole drill based on full-size three-dimensional laser scanning information, optimizing and registering the initial three-dimensional model and obtaining the overall wear quantized value of the button bit of the down-the-hole drill comprises: comparing the alloy tooth local areas of the three-dimensional model of the target drill bit to obtain the abrasion quantized value of a single alloy tooth; and integrating the abrasion quantitative value of the single alloy tooth into the integral abrasion quantitative value of the spherical tooth drill bit of the down-the-hole drill.
4. The method for real-time measurement of wear values of a button bit of a down-the-hole drill according to claim 1, wherein the obtaining the while-drilling parameter of the button bit of the down-the-hole drill, analyzing the mapping relation between the while-drilling parameter and the overall wear quantized value, and constructing a database between the while-drilling parameter and the wear values of the bit according to the mapping relation comprises: acquiring drilling parameters of the spherical tooth drill bit of the down-the-hole drill by using a measurement while drilling system; noise signal rejection is carried out on the while-drilling parameters based on a data threshold value, so that while-drilling parameter effective data of the down-the-hole drill button bit are obtained; and carrying out accumulated and average treatment on the effective data of the while-drilling parameters to obtain target information of the while-drilling parameters of the spherical tooth drill bit of the down-the-hole drill.
5. The method for real-time measurement of a drill bit wear value of a down-the-hole drill button according to claim 4, wherein the analyzing the mapping relation between the while-drilling parameter and the overall wear quantized value, and constructing a database between the while-drilling parameter and the drill bit wear value according to the mapping relation comprises: obtaining a depth interval of the overall abrasion quantized value; Performing corresponding analysis on the while-drilling parameter target information and the overall abrasion quantized value according to the depth interval to obtain a mapping relation between the while-drilling parameter and the overall abrasion quantized value; and constructing a database between the while-drilling parameters and the drill bit abrasion values according to the mapping relation.
6. The method for real-time measurement of the wear value of the button bit of the down-the-hole drill according to claim 1, wherein the deriving the dimensionless variable from the dimensional analysis method and the database comprises: introducing a hidden function equation; the hidden function equation satisfies the following relationship: , Wherein, the As a function of the hidden function equation, Is the sum of the accumulated wear values of the alloy teeth of the spherical tooth drill bit in the axial direction, In order to accumulate the depth of the drill, In order for the rate of penetration to be high, In order to drill the shaft force, In order to achieve the drilling torque, In order to strike the wind pressure, Is the impact frequency; And constructing a variable dimension matrix based on the hidden function equation, the dimension analysis method and the database.
7. The method for real-time measurement of a button bit wear value of a down-the-hole drill according to claim 6, wherein deriving the dimensionless variable from the dimensional analysis method and the database comprises: Deducing a dimensionless variable expression according to the variable dimension matrix and the hidden function equation; the dimensionless variable expression satisfies the following relationship: , Wherein, the The accumulated wear intensity coefficient of the drill bit corresponding to the unit drilling depth, Is the sum of the accumulated wear values of the alloy teeth of the spherical tooth drill bit in the axial direction, In order to accumulate the depth of the drill, For the drilling rate-to-percussion frequency adaptation coefficient, In order for the rate of penetration to be high, In order to achieve the frequency of the impact, As a torque-axial force-depth coupling factor, In order to achieve the drilling torque, In order to drill the shaft force, To impact wind pressure-axial force-depth co-factor, Is the impact wind pressure; and obtaining the dimensionless variable by using the dimensionless variable expression and the database.
8. The method for real-time measurement of the wear value of the button bit of the down-the-hole drill according to claim 7, wherein the step of introducing a second order polynomial and cross terms to perform combined screening on the dimensionless variable and determining the dimensionless variable combination of the influence of the wear of the bit comprises: establishing a model function between drill bit abrasion and drilling parameters according to the dimensionless variable; performing form conversion on the model function to obtain a logarithmic form model function; introducing a second-order polynomial and a cross term of a dimensionless variable; and based on the second-order polynomial, the cross terms and the logarithmic form model function, combination screening is carried out, and dimensionless variable combination of drill bit abrasion influence is determined.
9. The method for real-time measurement of the wear value of the button bit of the down-the-hole drill according to claim 1, wherein substituting the dimensionless variable combination into a multiple linear regression model to establish a mathematical relationship model between the wear of the bit and the while-drilling parameters, and using the mathematical relationship model to realize real-time measurement of the wear value of the button bit of the down-the-hole drill comprises: The mathematical relationship model satisfies the following relationship: , Wherein, the Is the sum of the accumulated wear values of the alloy teeth of the spherical tooth drill bit in the axial direction, In order to accumulate the depth of the drill, In order for the rate of penetration to be high, In order to achieve the frequency of the impact, In order to achieve the drilling torque, In order to drill the shaft force, Is the impact wind pressure.
10. A real time measurement system of the wear value of a button bit of a down-the-hole drill, characterized in that the system comprises a processor, an input device, an output device and a memory, which are interconnected, wherein the memory is adapted to store a computer program comprising program instructions, the processor being configured to invoke the program instructions for performing the real time measurement method of the wear value of a button bit of a down-the-hole drill according to any one of claims 1-9.

Description

Real-time measurement method and system for wear value of spherical tooth drill bit of down-the-hole drill Technical Field The invention relates to the technical field of down-the-hole drill button bit abrasion measurement, in particular to a real-time measurement method and a real-time measurement system for a down-the-hole drill button bit abrasion value. Background The down-the-hole drill determines the working efficiency and the construction safety in the engineering fields of surface mine exploitation, geological exploration and the like, and has important influence on the overall progress and the comprehensive cost of the engineering. The abrasion value of the drill bit of the down-the-hole drill can influence the drilling precision, so that the problems of deviation of the drilling position, unsatisfactory aperture and the like are caused, the drilling speed is influenced, and the drilling efficiency of the drill bit with serious abrasion is greatly reduced. In addition, the abrasion of the drill bit is tightly connected with the energy consumption, maintenance cost and operation safety of the equipment, as the abrasion of the drill bit is increased, the equipment needs to consume more energy to maintain drilling, the energy consumption is increased, meanwhile, the service life of the drill bit is shortened due to the fact that the abrasion of the drill bit is too fast, the frequency of replacing the drill bit is increased, the maintenance cost is further increased, when the abrasion value of the drill bit is too large, the drilling efficiency is rapidly reduced, the drilling jamming risk is greatly increased, and even equipment damage can be possibly caused under extreme conditions, so that serious safety accidents and economic losses are caused. At present, the monitoring means of the drill bit abrasion value of the down-the-hole drill in the industry is obviously insufficient, the real-time and accurate requirements of an engineering site are difficult to meet, the current monitoring means mainly comprises off-line manual detection, after an operation gap is stopped, special equipment is used for measuring the diameter of the drill bit or observing the abrasion state of alloy teeth through naked eyes, the dynamic change of the drill bit abrasion in the drilling process can not be captured in real time, the static abrasion condition at the stopping moment can only be obtained, the abrasion trend of the drill bit in the continuous operation process can not be reflected in time, and effective basis is difficult to be provided for dynamic adjustment in the construction process. Some of the abrasion loss of the drill bit is estimated based on an empirical formula and combined with parameters such as rock hardness, drilling time length and the like, but in an actual working condition, geological conditions are complex and changeable, rock hardness is unevenly distributed, and the abrasion loss obtained through estimation is greatly deviated from an actual value due to the influence of various factors in the drilling process, so that the actual abrasion loss of the drill bit cannot be accurately reflected. Based on the technical problem in the process of acquiring the wear value of the drill bit of the down-the-hole drill, a practical scheme is needed to realize real-time and accurate monitoring of the wear value of the ball tooth drill bit of the down-the-hole drill, so that the high efficiency and safety of engineering are ensured. Disclosure of Invention Aiming at the defects of the existing method and the defects of practical application, in the operation flow of the down-the-hole drill, the abrasion state of the drill bit and rock continuously interact and is in a dynamic evolution process, in order to capture the dynamic change of the abrasion of the drill bit during drilling in real time, the abrasion value of the spherical tooth drill bit of the down-the-hole drill is measured in real time, the deviation between the abrasion estimated quantity and the practical abrasion value is reduced, and the real abrasion state of the drill bit is effectively presented. The invention provides a real-time measurement method of a down-the-hole drill spherical bit abrasion value, which comprises the following steps of constructing an initial three-dimensional model of the down-the-hole drill spherical bit based on full-size three-dimensional laser scanning information, optimizing and registering the initial three-dimensional model and obtaining the overall abrasion quantization value of the down-the-hole drill spherical bit, obtaining the while-drilling parameters of the down-the-hole drill spherical bit, analyzing the mapping relation between the while-drilling parameters and the overall abrasion quantization value, constructing a database between the while-drilling parameters and the drill abrasion value according to the mapping relation, deducing dimensionless variables according to a dimensionality analysis