CN107545124B - The prediction technique of the normal section disk cutter wear condition of rock tunnel development machine - Google Patents
The prediction technique of the normal section disk cutter wear condition of rock tunnel development machine Download PDFInfo
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Abstract
The prediction technique of the normal section disk cutter wear condition of rock tunnel development machine of the present invention, it is related to tunnel piercing equipment construction technology, from the real-time determination of six correlations between relevant parameters various in constructing tunnel, cutterhead revolving speed n, Advance rate v, cutter head torque T, cutterhead thrust F, drilling depth δ, cutting coefficient C, slip rate s, sliding distance l including determining rock tunnel development machinei, contact stress P, on hobboing cutter weight abrasion loss G and cutterhead the normal section disk cutter of No. i-th front single-blade weight abrasion loss GiBetween correlation overcome the defect that shortage of the existing technology directly detects the effective technology means of normal section disk cutter abrasion to realize estimating in real time for the normal section disk cutter abrasion condition of front single-blade in cutterhead difference installation site.
Description
Technical field
Technical solution of the present invention is related to tunnel piercing equipment construction technology, and specifically rock tunnel development machine is often cut
The prediction technique of face shape hob abrasion situation.
Background technique
Normal section disk cutter efficiency of breaking rock is high, and long service life has obtained widely answering in rock tunnel development machine
With.Since rock strength height and hardness are big, tool wear problem is very in rock geology work progress for rock tunnel development machine
Seriously.Frequent cutter changing not only delays construction period, increases construction cost, become puzzlement construction safety it is important because
Element, moreover, rock breaking capacity reduces after tool wear, energy consumption increases, once exceeding the limit of wear, Cutting Tool Damage can not be repaired
It is multiple, or even jeopardize cutterhead, lead to construction failure, thus the real-time detection of the tool wear situation of rock tunnel development machine becomes and mentions
High drivage efficiency, avoids construction failure, saves the urgent need of construction cost.
CN201510617860.4 discloses the real-time computing technique of hard rock tunnel driving machine disk cutter abrasion loss, the party
Method considers the variation of hobboing cutter geometric radius and changes this interrelated factor with TBM boring parameter, passes through analysis boring parameter
The variation of variation prediction hobboing cutter geometric radius, and then reach prediction hob abrasion degree purpose, still, exists and have ignored to rolling
Knife wears the analysis of evolutionary process inherent mechanism and rule, it is difficult to realize that Cutter wear evolution pilot process is accurately estimated scarce
It falls into.CN201610771253.8 discloses a kind of normal section disk cutter weight abrasion loss predictor method of hard rock tunnel development machine,
This method is with disk cutter normal thrust loading prediction tool wear, it is contemplated that this influence factor of load passes through disk cutter
Normal thrust load and mechanical parameters predict Tool Wear Process, and still, it is difficult that there are disk cutter normal thrust load
The stress condition on infinitesimal is contacted when really reflecting hobboing cutter broken rock, and then affects the defect of the accuracy of prediction result.Always
It, due to cutter work bad environments, rock break-off process is complicated, still lacks directly detect having for normal section disk cutter abrasion at present
Imitate technological means.
Summary of the invention
The technical problems to be solved by the present invention are: providing the normal section disk cutter wear condition of rock tunnel development machine
Prediction technique, from the real-time determination of six correlations between relevant parameters various in constructing tunnel, to realize cutterhead difference
The real-time of the normal section disk cutter abrasion condition of front single-blade in installation site is estimated, and shortage of the existing technology is overcome
Directly detect the defect of the effective technology means of normal section disk cutter abrasion.
The present invention solves technical solution used by the technical problem: the normal section disk cutter mill of rock tunnel development machine
The prediction technique of damage situation, the specific steps are as follows:
The first step determines the correlation between cutterhead revolving speed, Advance rate and the drilling depth of rock tunnel development machine:
Correlation between the cutterhead revolving speed of rock tunnel development machine, Advance rate and drilling depth is true by following formula (1)
It is fixed,
In formula (1): δ is the drilling depth of rock tunnel development machine, i.e. cutterhead often rotates a circle the rock tunnel development machine
Driving distance, unit mm/r, v are the Advance rate of rock tunnel development machine, and unit mm/min, n are rock tunnel driving
The cutterhead revolving speed of machine, unit r/min, the cutterhead revolving speed n and Advance rate v of rock tunnel development machine are by being installed on rock
The boring parameter that data collection system inside rock tunnel(ling) machine equipment acquires in real time；
Second step determines the correlation between cutterhead thrust, cutter head torque and the cutting coefficient of rock tunnel development machine:
There are correlation, this relationships between the cutterhead thrust of rock tunnel development machine, cutter head torque and cutting coefficient
It is determined by following formula (2),
In formula (2): C is the cutting coefficient of rock tunnel development machine, and N is to be installed on rock tunnel development machine cutterhead
Hobboing cutter quantity, riFor the installation radius for being installed on No. i-th hobboing cutter on rock tunnel development machine cutterhead, unit m,For installation
In the N on rock tunnel development machine cutterhead the sum of the installation radius of hobboing cutter, unit m, T are the cutterhead of rock tunnel development machine
Torque, unit KNm are acquired in real time by being installed on the data collection system inside rock tunnel development machine equipment, and F is rock
The cutterhead thrust of rock tunnel(ling) machine, unit KN, by the data collection system reality being installed on inside rock tunnel development machine equipment
When acquire；
Third step, slip rate when determining the drilling depth, cutting coefficient and normal section disk cutter broken rock of rock tunnel development machine
Between correlation:
When the drilling depth δ of rock tunnel development machine, the cutting coefficient C of rock tunnel development machine and normal section disk cutter broken rock
There are correlation between slip rate s, this relationship is determined by following formula (3),
s≈γ·δ0.5·C1.2 (3)
In formula (3): slip rate when s is normal section disk cutter broken rock, is dimensionless group, γ is constant；
4th step, determine sliding on rock tunnel development machine cutterhead in No. i-th normal section disk cutter actual motion away from
From:
Sliding distance on rock tunnel development machine cutterhead in No. i-th normal section disk cutter actual motion is by following formula
(4) it determines,
li=sLi=γ δ0.5·C1.2·nπrit (4)
In formula (4): liFor the sliding on rock tunnel development machine cutterhead in No. i-th normal section disk cutter actual motion
Distance, unit m, LiFor No. i-th on rock tunnel development machine cutterhead normal section disk cutter actual motion distance, unit m,
T is time, unit min；
5th step, the contact acted on contact arc length when determining the normal section disk cutter broken rock of rock tunnel development machine are answered
Power:
The contact stress P on contact arc length is acted on when the normal section disk cutter broken rock of rock tunnel development machine, unit is
Mpa, it is determining by following formula (5),
In formula (5): S is the knife spacing on rock tunnel development machine cutterhead between adjacent knife position, unit mm, σcFor pick
Into geology rock uniaxiality strength, unit Mpa, σtTo tunnel geology Tensile Strength of Rock, unit Mpa, d are normal section
Disk cutter blade width, unit mm, the α angle between Rock Joint Plane and tunnel axis, abbreviation ROCK MASS JOINT angle, unit
For radian rad；
6th step determines any one the normal section disk cutter weight abrasion of front single-blade on rock tunnel development machine cutterhead
Amount is with the contact stress acted on contact arc length when rock abrasion characteristic coefficient and the normal section disk cutter broken rock and in fact
The correlation between sliding distance in the movement of border:
It is any one on rock tunnel development machine cutterhead that the normal section disk cutter weight abrasion loss G of front single-blade and rock are ground
It is acted in contact stress P and its actual motion on contact arc length when erosion characteristic coefficient W and the normal section disk cutter broken rock
Sliding distance l between correlation by following formula (6) determine,
G=kWa·Pb·l (6)
In formula (6): l is the sliding distance in the normal section disk cutter actual motion, and unit m, k, a and b are normal
Number, is obtained by the ring block Wearing Simulated Test method of standard；
7th step determines the normal section dish type rolling of No. i-th front single-blade on its cutterhead when rock tunnel development machine normally tunnels
The specific value of knife weight abrasion loss:
The normal section disk cutter weight abrasion loss of No. i-th front single-blade on its cutterhead when rock tunnel development machine normally tunnels
Specific value by following formula (7) determine,
Gi=kWa·Pb·sLi (7)
In formula (7): GiFor the weight mill of the normal section disk cutter of No. i-th front single-blade on rock tunnel development machine cutterhead
Damage amount, unit Kg, slip rate when s is normal section disk cutter broken rock, is dimensionless group, LiFor rock tunnel development machine
The actual motion distance of No. i-th normal section disk cutter on cutterhead；
The cutting coefficient of the drilling depth δ of rock tunnel development machine in formula (1), rock tunnel development machine in formula (2)
C, slip rate s when normal section disk cutter broken rock in formula (3), in formula (4) be on rock tunnel development machine cutterhead
Sliding distance l in No. i-th normal section disk cutter actual motioni, the normal section dish type of rock tunnel development machine in formula (5)
The contact stress P on contact arc length is acted on when hobboing cutter broken rock, any one on the rock tunnel development machine cutterhead in formula (6)
No. i-th front is single on rock tunnel development machine cutterhead in the normal section disk cutter weight abrasion loss G of front single-blade and formula (7)
The weight abrasion loss G of the normal section disk cutter of swordiIt is the driving ginseng acquired in real time by rock tunnel development machine data collection system
Number cutterhead revolving speed n, Advance rate v, cutter head torque T and cutterhead thrust F, the rock mass parameter rock joint that Engineering Geology Investigation obtains
Angle α, driving geology rock uniaxiality strength σcWith driving geology Tensile Strength of Rock σt, rock that rock wear test obtains
Constant value k, a and b that abrasion characteristic coefficient W and Wearing Simulated Test obtain, are quickly calculated, thus complete by computer
At the prediction of the normal section disk cutter abrasion of rock rock tunnel(ling) machine.
The prediction technique of the above-mentioned normal section disk cutter wear condition of rock tunnel development machine, it is related to be loaded on rock tunnel
The ring block of data collection system and its real-time collecting method, rock wear test and standard inside road development machine equipment wears mould
Quasi- test method is well-known in the art, driving geology rock uniaxiality strength σc, driving geology Tensile Strength of Rock σt
It is measured with rock abrasion characteristic coefficient W by testing.
Beneficial effects of the present invention are as follows:
Compared with prior art, the present invention has following substantive distinguishing features outstanding:
(1) disclosed in the CN201510617860.4 compared with technology, the present invention has following substantive distinguishing features outstanding:
1) used method is worn from prediction to be compared:
In the tunneling process of rock tunnel development machine, hobboing cutter is contacted under cutterhead thrust and torque collective effect and is rolled simultaneously
Cutting removing rock, cutter and rock constitute the mechanical system for being in contact with each other, interacting.Hob abrasion is hobboing cutter cutter ring table
Plane materiel material and rock mass surfacing persistently contact with each other effect as a result, with contact material, contact form, contact load and connecing
It touches the variations of factors such as operating condition and changes.Hob abrasion develop inherent law be predict hob abrasion evolutionary process basis with
It is crucial.
CN201510617860.4 passes through boring parameter variation caused by being changed to abrasion front and back by hobboing cutter geometric radius
Comparative analysis, the method for proposing prediction TBM hob abrasion degree do not develop the progress of this essential process deeply to hob abrasion
Enter systematic research, it is difficult to estimate the pilot process of hob abrasion evolution.CN201510617860.4 considers hobboing cutter geometry half
Diameter variation changes this interrelated factor with TBM (rock tunnel(ling) machine) boring parameter, pre- by the variation for analyzing boring parameter
Survey the variation of hobboing cutter geometric radius, and then reach prediction hob abrasion degree purpose, present in disadvantage be: have ignored pair
The analysis of hob abrasion evolutionary process inherent mechanism and rule, it is difficult to realize that Cutter wear evolution pilot process is accurately estimated.
The present invention is during establishing prediction technique, based on the mechanism and analysis of experiments to hob abrasion evolutionary process,
The inherent law Cutter wear evolutionary process controlling effect for fully taking into account hob abrasion evolution, innovatively proposes base
In abrasion evolution mechanism and analysis of experiments, rock mass materials and structural parameters and the hob abrasion that cutter head structure parameter influences are considered
The polynary prediction technique of process realizes estimating in real time for the normal section disk cutter abrasion pilot process of rock tunnel development machine.
2) comparison of parameter used in prediction technique is compared:
Abrasion is that two solid surface materials persistently contact with each other the result of effect.Contact material feature, contact load with
Contact operating condition is the key factor for influencing abrasion and developing.During Specific construction, rock tunnel development machine hobboing cutter material is basic
It is consistent.Rock mass constantly changes with the difference of geological conditions, and the erosion property of rock directly affects hob abrasion.And
And the structure feature and knife disc tool mounting characteristic of rock mass will affect hobboing cutter stress, and then influence the wear process of hobboing cutter.
CN201510617860.4 predicts hob abrasion by boring parameter correlation before and after analysis hob abrasion, ignores
The influences of rock mass materials and structural parameters to hob abrasion.CN201510617860.4 is pre- using the correlation of boring parameter
Tool wear degree is surveyed, existing disadvantage is: having ignored and divides hobboing cutter stress with cutter head structure parameter rock mass parameter
Analysis, affects the accuracy of prediction result, so intercoupling from the point of view of effect from analysis hobboing cutter and rock mass, which is lacked
Few rock mass materials and the impact analysis of structural parameters and cutter head structure parameter to hob abrasion.
The present invention fully takes into account rock erosion property to hobboing cutter in analysis hobboing cutter and rock mass contact wear mechanism
The influence of wear process, in conjunction with the special destructive process of rock and structure characteristics of rock mass and knife disc tool mounting characteristic to contacting
The influence of load is innovatively proposed using rock wearing character, contact stress, slip rate and driving distance as key parameter
From the normal section disk cutter Wear prediction of six correlations between relevant parameters various in constructing tunnel determined in real time
Method, wherein contact stress contains the influence of rock mechanics parameters and ROCK MASS JOINT and cutter head structure parameter (knife spacing),
Slip rate contains the influence of boring parameter, and the method for the present invention integrated use boring parameter, cutter head structure parameter and rock mass are joined
Correlation between three aspect parameter of number realizes estimating in real time for hob abrasion evolutionary process.
(2) disclosed in the CN201610771253.8 compared with technology, the present invention has following substantive distinguishing features outstanding:
1) it is analyzed and is compared from the angle that used load parameter is worn in prediction:
Abrasion is that two surfaces of solids contact with each other effect as a result, contact stress is the key mechanics ginseng for influencing wear process
Amount.In hobboing cutter rock break-off process, it is face contact that hobboing cutter is contacted with rock mass, and contact stress can directly reflect each infinitesimal in contact area
The stress condition of upper material.
CN201610771253.8 is with disk cutter normal thrust loading prediction tool wear, it is difficult to which true reflection hobboing cutter is broken
The stress condition on infinitesimal is contacted when rock.By CN201610771253.8 invention disclosed content and embodiment as it can be seen that the patent
Technology considers this influence factor of load, it is intended to predict cutter by disk cutter normal thrust load and mechanical parameters
Wear process, but the disadvantage present in it is: disk cutter normal thrust load is difficult to reflect strictly according to the facts in contact area often
Material load on a infinitesimal, and then affect the accuracy of prediction result.
The present invention fully takes into account the influence of contact stress Cutter wear process during establishing prediction technique,
It innovatively proposes using contact stress as the key mechanics parameter of prediction tool wear, makes computation model more close to rolling
The practical rock break-off process of knife, improves the accuracy of prediction result.
2) comparison of mechanical analysis used by prediction technique is compared:
Rock material is special fragile material, and destructive process is complicated, not there is only flexible deformation, plastic deformation, is also damaged
Hurt failure procedure.Meanwhile stress of the structure feature and knife disc tool mounting characteristic of rock mass when can be to hobboing cutter broken rock generates
It influences.
By CN201610771253.8 invention disclosed content and embodiment as it can be seen that the patented technology merely with material bullet
Property modulus and Poisson's ratio, assumed (specified) load, it is intended to which actual load characteristic is reflected by elastic mechanics model.But present in it
Disadvantage is: single analysis on elasticity can not embody damage of rock failure procedure.So from analysis hobboing cutter broken rock mechanics
From the point of view of process, there are biggish calculating errors during LOAD FOR for the patented technology.
The present invention fully takes into account the special destructive process of rock and rock mass knot during hobboing cutter broken rock mechanical analysis
The influence of structure feature and knife disc tool mounting characteristic starts with from analysis rock mass bearing capacity, innovatively proposes consideration rock mass
The Calculation of Contact Stress formula of joint angle and knife effect of distance, reduces prediction error, enhances the specific aim of prediction technique, answers
With property and universality.
Compared with prior art, the present invention has following marked improvement:
(1) the present invention is based on the mechanics and Analysis on Mechanism of contact surface interaction proposes rock tunnel in conjunction with wear test
The prediction technique of the normal section disk cutter wear condition of road development machine, from six phases between relevant parameters various in constructing tunnel
The real-time determination of mutual relation, to realize the reality of the normal section disk cutter abrasion condition of front single-blade in cutterhead difference installation site
When estimate, overcome shortage of the existing technology and directly detect the effective technology means of normal section disk cutter abrasion and lack
It falls into.
(2) the method for the present invention is realized from the response of boring parameter and geologic parameter variation to the normal section disk of front single-blade
The refinement of shape hob abrasion information estimates hob abrasion situation applied to practice of construction process in real time, for improving rock tunnel
Development machine drivage efficiency, optimization boring parameter, extension cutter life play significant role.
(3) for the present invention based on theory analysis, test simulation is means, explores hob abrasion under actual working conditions and drills
The inherent law of change has comprehensively considered polishing machine, ROCK MASS JOINT angle, cutter head structure parameter (knife spacing), the driving of rock
The key factors such as load and load cycle effect influence, and estimate rolling using the boring parameter that rock tunnel development machine acquires in real time
Knife motion state, and on this basis, the driving load and geologic parameter acquired in real time by rock tunnel development machine changes pre-
Estimate hob abrasion situation, provides feasible approach to estimate hob abrasion process in Practical Project in real time.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is disk cutter scheme of installation on rock tunnel development machine cutterhead used in a Tunnel Engineering.
Specific embodiment
Embodiment illustrated in fig. 1 shows that disk cutter is installed on rock tunnel development machine cutterhead used in a Tunnel Engineering
Situation: its cutter axis is located at cutter head center, cutter radius 2885mm, there is 42 knife positions number, installs the normal section disk of 17in
Shape hobboing cutter, knife position number be respectively 1,2,3 ..., 40,41,42.Knife position number is bigger, and cutter is remoter away from cutter head center.Adjacent knife position
Between number be adjacent knife position installation radius difference, referred to as knife spacing, unit mm.4 are installed on No. 1 to No. 8 knife position
Center double-edged hobbing cutter, installation radius of No. 1 knife position on cutterhead is 90mm, and the knife spacing of No. 2 knife positions and No. 1 knife position is
The knife spacing of 86mm, No. 3 knife positions and No. 2 knife positions is 82mm, and the knife spacing of No. 4 knife positions and No. 3 knife positions is 86mm, No. 5 knife positions and 4
The knife spacing of number knife position is 84mm, and the knife spacing of No. 6 knife positions and No. 5 knife positions is 86mm, the knife spacing of No. 7 knife positions and No. 6 knife positions
For 82mm, the knife spacing of No. 8 knife positions and No. 7 knife positions is 86mm；Front single-blade is rolled in installation 20 between No. 8 knife positions and No. 29 knife positions
Knife, knife position number are arranged successively from No. 9 to No. 28, wherein installation 8 is front single-blade hob, knife between No. 8 knife positions and No. 16 knife positions
Position number is arranged successively from No. 9 to No. 16, and the knife spacing of each adjacent knife position is 85mm between No. 8 knife positions and No. 16 knife positions, and No. 16
The difference of the installation radius of knife position and No. 8 knife positions is 8 × 85=680mm；Installation 12 is front between No. 16 knife positions and No. 29 knife positions
Single-blade hob, knife position number are arranged successively from No. 17 to No. 28, the knife spacing of each adjacent knife position between No. 16 knife positions and No. 29 knife positions
It is 84mm, the difference of the installation radius of No. 29 knife positions and No. 16 knife positions is 12 × 84=1092mm；Pacify on No. 29 to No. 42 knife positions
14 edge single-blade hobs are filled, the knife spacing of No. 30 knife positions and No. 29 knife positions is 64mm, between No. 31 knife positions and the knife of No. 30 knife positions
Away from for 63mm, the knife spacing of No. 32 knife positions and No. 31 knife positions is 60mm, and the knife spacing of No. 33 knife positions and No. 32 knife positions is 57mm, 34
The knife spacing of number knife position and No. 33 knife positions is 54mm, and the knife spacing of No. 35 knife positions and No. 34 knife positions is 43mm, No. 36 knife positions and 35
The knife spacing of number knife position is 37mm, and No. 36 and No. 37 Cutting tool installation manners are on the same installation radius of cutterhead, No. 38 knife positions and No. 37 knives
The knife spacing of position is 30mm, No. 38 and No. 39 Cutting tool installation manners on the same installation radius of cutterhead, No. 40 knife positions and No. 30 knife positions
Knife spacing is 23mm, and No. 40, No. 41 and No. 42 Cutting tool installation manners are located at cutterhead outer most edge on the same installation radius of cutterhead.
Embodiment 1
The method of the present invention is further described below by way of specific embodiment, it should be noted that do not implemented with this
Example limits claims of the invention.
The prediction technique of the normal section disk cutter wear condition of rock tunnel development machine, the specific steps are as follows:
The first step determines the correlation between cutterhead revolving speed, Advance rate and the drilling depth of rock tunnel development machine:
Correlation between the cutterhead revolving speed of rock tunnel development machine, Advance rate and drilling depth is true by following formula (1)
It is fixed,
In formula (1): δ is the drilling depth of rock tunnel development machine, i.e. cutterhead often rotates a circle the rock tunnel development machine
Driving distance, unit mm/r, v are the Advance rate of rock tunnel development machine, and unit mm/min, n are rock tunnel driving
The cutterhead revolving speed of machine, unit r/min, cutterhead revolving speed and Advance rate are internal by being installed on rock tunnel development machine equipment
The boring parameter that acquires in real time of data collection system；
In the present embodiment, cutterhead revolving speed n=6.65r/min, as the Advance rate v=78mm/min of a P. drechsleri
When, then in the P. drechsleri rock tunnel development machine drilling depth δ are as follows:
The drilling depth δ of the rock tunnel development machine of the Advance rate v of other different P. drechsleris is calculated with same method；
Second step determines the correlation between cutterhead thrust, cutter head torque and the cutting coefficient of rock tunnel development machine:
There are correlation, this relationships between the cutterhead thrust of rock tunnel development machine, cutter head torque and cutting coefficient
It is determined by following formula (2),
In formula (2): C is the cutting coefficient of rock tunnel development machine, and N is to be installed on rock tunnel development machine cutterhead
Hobboing cutter quantity, riFor the installation radius for being installed on No. i-th hobboing cutter on rock tunnel development machine cutterhead, unit m,For installation
In the N on rock tunnel development machine cutterhead the sum of the installation radius of hobboing cutter, unit m, T are the cutterhead of rock tunnel development machine
Torque, unit KNm are acquired in real time by being installed on the data collection system inside rock tunnel development machine equipment, and F is rock
The cutterhead thrust of rock tunnel(ling) machine, unit KN, by the data collection system reality being installed on inside rock tunnel development machine equipment
When acquire；
Hobboing cutter quantity N=42 handle, 42 be installed on the cutterhead are installed on rock tunnel development machine cutterhead in the present embodiment
The sum of the installation radius of hobboing cutterThe cutter head torque T=acquired in real time in above-mentioned P. drechsleri
12234.760KNm, cutterhead thrust F=15456.636KN；Then in the P. drechsleri rock tunnel development machine cutting coefficient
Are as follows:
Third step, slip rate when determining the drilling depth, cutting coefficient and normal section disk cutter broken rock of rock tunnel development machine
Between correlation:
Drilling depth δ, the cutting coefficient C of rock tunnel development machine and exist when normal section disk cutter broken rock between slip rate s
Correlation, this relationship is determining by following formula (3),
s≈γ·δ0.5·C1.2 (3)
In formula (3): slip rate when s is normal section disk cutter broken rock, is dimensionless group, and γ is constant, for
The common normal section disk cutter of 17in, within the scope of normal wear 20mm, γ ≈ 0.0054, for commonly using the normal section dish type of 19in
Hobboing cutter, within the scope of normal wear 20mm, γ ≈ 0.0051；
The disk cutter that the present embodiment uses is the normal section disk cutter of 17in, takes γ ≈ 0.0054, then normal section dish type
Slip rate s when hobboing cutter broken rock are as follows:
s≈γ·δ0.5·C1.2=0.0054 × 11.70.5×0.45551.2=0.007189
4th step, determine sliding on rock tunnel development machine cutterhead in No. i-th normal section disk cutter actual motion away from
From:
Sliding distance on rock tunnel development machine cutterhead in No. i-th normal section disk cutter actual motion is by following formula
(4) it determines,
li=sLi=γ δ0.5·C1.2·nπrit (4)
In formula (4): liFor the sliding on rock tunnel development machine cutterhead in No. i-th normal section disk cutter actual motion
Distance, unit m, slip rate when s is normal section disk cutter broken rock, is dimensionless group, LiFor rock tunnel development machine
No. i-th normal section disk cutter actual motion distance, unit m, t are time, unit min on cutterhead；
In the present embodiment, s=0.007189 is obtained by above-mentioned third step, rock tunnel development machine cutterhead No. 9 to the 28th
Number knife position is front single-blade disk cutter, wherein L12It is real for No. 12 on rock tunnel development machine cutterhead normal section disk cutter
Border move distance, L22For No. 22 on rock tunnel development machine cutterhead normal section disk cutter actual motion distance, it is installed on rock
The installation radius r of No. 12 hobboing cutter on stone rock tunnel(ling) machine cutterhead12=1.022m is installed on rock tunnel development machine cutterhead
The installation radius r of No. 22 hobboing cutters22=1.866m, the practical driving time t=10.3min of driving in above-mentioned P. drechsleri, then
In the P. drechsleri, it is installed on the sliding distance l on rock tunnel development machine cutterhead in No. 12 hobboing cutter actual motion12And installation
In the sliding distance l on rock tunnel development machine cutterhead in No. 22 hobboing cutter actual motion22It is respectively as follows:
l12=sL12=0.007189 × 2 × 6.65 × π × 1.022 × 10.3=3.162m
l22=sL22=0.007189 × 2 × 6.65 × π × 1.866 × 10.3=5.773m
5th step, the contact acted on contact arc length when determining the normal section disk cutter broken rock of rock tunnel development machine are answered
Power:
The contact stress P on contact arc length is acted on when the normal section disk cutter broken rock of rock tunnel development machine, unit is
Mpa, it is determining by following formula (5),
In formula (5): S is the knife spacing on rock tunnel development machine cutterhead between adjacent knife position, unit mm, σcFor pick
Into geology rock uniaxiality strength, unit Mpa, σtTo tunnel geology Tensile Strength of Rock, unit Mpa, d are normal section
Disk cutter blade width, unit mm, the α angle between Rock Joint Plane and tunnel axis, abbreviation ROCK MASS JOINT angle, unit
For radian rad；
In the present embodiment, dish type is rolled on rock tunnel development machine cutterhead used in a Tunnel Engineering according to figure 1
Knife scheme of installation, No. 12 knife spacing=85mm between hobboing cutter and adjacent cutter on the rock tunnel development machine cutterhead,
No. 22 knife spacing=84mm between hobboing cutter and adjacent cutter；Tunnel geology rock uniaxiality strength σc=62.0Mpa, driving
Geology Tensile Strength of Rock σt=5.0Mpa；Blade width d=12mm；ROCK MASS JOINT angle α=π/3.
Then as knife interval S=85mm, when rock tunnel development machine normal section disk cutter broken rock, acts on contact arc
Contact stress P in length are as follows:
Then as knife interval S=84mm, when rock tunnel development machine normal section disk cutter broken rock, acts on contact arc
Contact stress P in length are as follows:
6th step determines any one the normal section disk cutter weight abrasion of front single-blade on rock tunnel development machine cutterhead
Amount is with the contact stress acted on contact arc length when rock abrasion characteristic coefficient and the normal section disk cutter broken rock and in fact
The correlation between sliding distance in the movement of border:
It is any one on rock tunnel development machine cutterhead that the normal section disk cutter weight abrasion loss G of front single-blade and rock are ground
It is acted in contact stress P and its actual motion on contact arc length when erosion characteristic coefficient W and the normal section disk cutter broken rock
Sliding distance l between correlation by following formula (6) determine,
G=kWa·Pb·l (6)
In formula (6): l is the sliding distance in the normal section disk cutter actual motion, and unit m, k, a and b are normal
Number, is obtained by the ring block Wearing Simulated Test method of standard；
In the present embodiment engineering, the rock abrasion characteristic coefficient W of geological formations locating for above-mentioned P. drechsleri is to pass through rock
Wear test measurement is slided under the effect of 70N load in rock surface 1s using with the steel needle that 90 ° of needle point angle hardness are 54HRC
Dynamic 10mm distance, needle point width after measurement abrasion, and characteristic coefficient is denuded with 10 times of characterization rocks of this width, it is surveyed by test
Obtain W=2.34；K, a and b is constant, can be obtained by Wearing Simulated Test method.It is made using hobboing cutter material in the present embodiment
Cutter sample makes rock specimens using the rock material of the engineering typical geology, according to simulation system and real system geometry
It is configured that similar, material properties is consistent, contact stress is close and the similar principle of relative motion form, in M-2000 wear test
The ring block Wearing Simulated Test that machine has carried out 180 groups of standards obtains constant k=2.37 × 10 according to test result-9, a=
1.93 b=2.38；
7th step determines the normal section dish type rolling of No. i-th front single-blade on its cutterhead when rock tunnel development machine normally tunnels
The specific value of knife weight abrasion loss:
The normal section disk cutter weight abrasion loss of No. i-th front single-blade on its cutterhead when rock tunnel development machine normally tunnels
Specific value by following formula (7) determine,
Gi=kWa·Pb·sLi (7)
In formula (7): GiFor the weight mill of the normal section disk cutter of No. i-th front single-blade on rock tunnel development machine cutterhead
Damage amount, unit Kg, slip rate when s is normal section disk cutter broken rock, is dimensionless group, LiFor rock tunnel development machine
The actual motion distance of No. i-th normal section disk cutter on cutterhead；
In the present embodiment, obtained by above-mentioned 5th step: as knife interval S=85mm, P=108.849Mpa；When knife interval S
When=84mm, P=108.420Mpa, above-mentioned 6th step is obtained: W=2.34, k=2.37 × 10-9, a=1.93 and b=2.38,
And the l that above-mentioned 4th step obtains12=s L12=3.162 and l22=s L22=5.773, which is calculated by formula (7)
In circulation, it is installed on the weight abrasion loss G of No. 12 normal section disk cutter of front single-blade on rock tunnel development machine cutterhead12With
It is installed on the weight abrasion loss G of No. 22 normal section disk cutter of front single-blade on rock tunnel development machine cutterhead22It is respectively as follows:
G12=kWa·Pb·l12=2.37 × 10-9×2.341.93×(108.849)2.38× 3.162kg=
0.0027kg
G22=kWa·Pb·l12=2.37 × 10-9×2.341.93×(108.420)2.38× 5.773kg=
0.0049kg
In the present embodiment, above-mentioned formula (1)~(7) result passes through computer and is quickly calculated, to complete rock
The prediction of the normal section disk cutter abrasion of stone rock tunnel(ling) machine.
The present embodiment engineering is during 16 ring is tunneled on typical case's rock mass stratum No. 12 on rock tunnel development machine cutterhead
The weight abrasion loss calculated value of the normal section disk cutter of front single-blade and No. 22 normal section disk cutter of front single-blade sees attached list 1
In 16 ring tunneling process of the typical rock mass of table 1. stratum on rock tunnel development machine cutterhead
The weight abrasion loss calculated value of No. 12 and No. 22 normal section disk cutter of front single-blade
In above-described embodiment, the related data collection system internal loaded on rock tunnel development machine equipment and its real-time
The ring block Wearing Simulated Test method of acquisition method, rock wear test and standard is well-known in the art, driving geology
Rock uniaxiality strength σc, driving geology Tensile Strength of Rock σtIt is measured with rock abrasion characteristic coefficient W by testing.
Claims (1)
1. the prediction technique of the normal section disk cutter wear condition of rock tunnel development machine, it is characterised in that specific step is as follows:
The first step determines the correlation between cutterhead revolving speed, Advance rate and the drilling depth of rock tunnel development machine:
Correlation between the cutterhead revolving speed of rock tunnel development machine, Advance rate and drilling depth determines by following formula (1),
In formula (1): δ is the drilling depth of rock tunnel development machine, i.e. the cutterhead driving that often rotates a circle the rock tunnel development machine
Distance, unit mm/r, v are the Advance rate of rock tunnel development machine, and unit mm/min, n are rock tunnel development machine
Cutterhead revolving speed, unit r/min, the cutterhead revolving speed n and Advance rate v of rock tunnel development machine are by being installed on rock tunnel
The boring parameter that data collection system inside development machine equipment acquires in real time；
Second step determines the correlation between cutterhead thrust, cutter head torque and the cutting coefficient of rock tunnel development machine:
There are correlation between the cutterhead thrust of rock tunnel development machine, cutter head torque and cutting coefficient, this relationship by with
Lower formula (2) is determining,
In formula (2): C is the cutting coefficient of rock tunnel development machine, and N is the hobboing cutter being installed on rock tunnel development machine cutterhead
Quantity, riFor the installation radius for being installed on No. i-th hobboing cutter on rock tunnel development machine cutterhead, unit m,To be installed on rock
For N on stone rock tunnel(ling) machine cutterhead the sum of the installation radius of hobboing cutter, unit m, T are that the cutterhead of rock tunnel development machine is turned round
Square, unit KNm are acquired in real time by being installed on the data collection system inside rock tunnel development machine equipment, and F is rock tunnel
The cutterhead thrust of road development machine, unit KN, by be installed on rock tunnel development machine equipment inside data collection system it is real-time
Acquisition；
Third step, when determining the drilling depth, cutting coefficient and normal section disk cutter broken rock of rock tunnel development machine between slip rate
Correlation:
The drilling depth δ of rock tunnel development machine, rock tunnel development machine cutting coefficient C with normal section disk cutter broken rock when slide
There are correlation between rate s, this relationship is determined by following formula (3),
s≈γ·δ0.5·C1.2 (3)
In formula (3): slip rate when s is normal section disk cutter broken rock, is dimensionless group, γ is constant；
4th step determines the sliding distance on rock tunnel development machine cutterhead in No. i-th normal section disk cutter actual motion:
Sliding distance on rock tunnel development machine cutterhead in No. i-th normal section disk cutter actual motion is by following formula (4)
It determines,
li=sLi=γ δ0.5·C1.2·nπrit (4)
In formula (4): liFor the sliding distance on rock tunnel development machine cutterhead in No. i-th normal section disk cutter actual motion,
Unit is m, LiFor No. i-th on rock tunnel development machine cutterhead normal section disk cutter actual motion distance, unit m, when t is
Between, unit min；
5th step acts on the contact stress on contact arc length when determining the normal section disk cutter broken rock of rock tunnel development machine:
The contact stress P on contact arc length, unit Mpa are acted on when the normal section disk cutter broken rock of rock tunnel development machine,
It is determined by following formula (5),
In formula (5): S is the knife spacing on rock tunnel development machine cutterhead between adjacent knife position, unit mm, σcFor driving ground
Matter rock uniaxiality strength, unit Mpa, σtTo tunnel geology Tensile Strength of Rock, unit Mpa, d are normal section dish type
Hobboing cutter blade width, unit mm, the α angle between Rock Joint Plane and tunnel axis, abbreviation ROCK MASS JOINT angle, unit is arc
Spend rad；
6th step, determine on rock tunnel development machine cutterhead it is any one the normal section disk cutter weight abrasion loss of front single-blade with
The contact stress on contact arc length and its practical fortune are acted on when rock abrasion characteristic coefficient and the normal section disk cutter broken rock
The correlation between sliding distance in dynamic:
It is any one on rock tunnel development machine cutterhead that the normal section disk cutter weight abrasion loss G of front single-blade and rock are denuded spy
The contact stress P on contact arc length and its cunning in actual motion are acted on when sign coefficient W and the normal section disk cutter broken rock
Correlation between dynamic distance l is determining by following formula (6),
G=kWa·Pb·l (6)
In formula (6): l is the sliding distance in the normal section disk cutter actual motion, and unit m, k, a and b are constant, is led to
The ring block Wearing Simulated Test method for crossing standard obtains；
7th step determines when rock tunnel development machine normally tunnels the normal section disk cutter weight of No. i-th front single-blade on its cutterhead
Measure the specific value of abrasion loss:
When rock tunnel development machine normally tunnels on its cutterhead the normal section disk cutter weight abrasion loss of No. i-th front single-blade tool
Body numerical value is determining by following formula (7),
Gi=kWa·Pb·sLi (7)
In formula (7): GiFor the weight abrasion loss of the normal section disk cutter of No. i-th front single-blade on rock tunnel development machine cutterhead,
Unit is Kg, and slip rate when s is normal section disk cutter broken rock, is dimensionless group, LiFor rock tunnel development machine cutterhead
The actual motion distance of upper No. i-th normal section disk cutter；
The drilling depth δ of rock tunnel development machine in formula (1), the cutting coefficient C of rock tunnel development machine in formula (2), public affairs
It is No. i-th on rock tunnel development machine cutterhead in slip rate s, formula (4) when normal section disk cutter broken rock in formula (3)
Sliding distance l in normal section disk cutter actual motioni, the normal section disk cutter of rock tunnel development machine in formula (5)
The contact stress P on contact arc length, any one front on the rock tunnel development machine cutterhead in formula (6) are acted on when broken rock
No. i-th front single-blade is normal on rock tunnel development machine cutterhead in the normal section disk cutter weight abrasion loss G of single-blade and formula (7)
The weight abrasion loss G of section disk cutteriIt is the boring parameter knife acquired in real time by rock tunnel development machine data collection system
Disk rotating speed n, Advance rate v, cutter head torque T and cutterhead thrust F, rock mass parameter rock joint angle α that Engineering Geology Investigation obtains,
Tunnel geology rock uniaxiality strength σcWith driving geology Tensile Strength of Rock σt, the abrasion of rock that rock wear test obtains
Constant value k, a and b that characteristic coefficient W and Wearing Simulated Test obtain quickly are calculated, to complete rock by computer
The prediction of the normal section disk cutter abrasion of stone rock tunnel(ling) machine.
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| CN109307493B (en) * | 2018-09-12 | 2020-01-17 | 天津大学 | Real-time detection method for abrasion condition of constant-section disc cutter of hard rock tunnel boring machine |
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