CN109162693A - A method of utilizing monitoring while drilling technical testing Rockmass Block index - Google Patents
A method of utilizing monitoring while drilling technical testing Rockmass Block index Download PDFInfo
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- CN109162693A CN109162693A CN201811083588.6A CN201811083588A CN109162693A CN 109162693 A CN109162693 A CN 109162693A CN 201811083588 A CN201811083588 A CN 201811083588A CN 109162693 A CN109162693 A CN 109162693A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B45/00—Measuring the drilling time or rate of penetration
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Abstract
The present invention provides a kind of method using monitoring while drilling technical testing Rockmass Block index, this method comprises: 1. install various measuring devices on drilling machine；2. carrying out drilling experiment at test site, the corresponding relationship in the rock mass of different Rock Mass Integralities between each drilling parameter is obtained；3. coring and the Rockmass Block index for calculating core；4. determining each section of pure drilling journey and assisted process in drilling process；5. calculating the rate of penetration of any depth in pure drilling journey；6. establishing the functional relation between Rockmass Block index and rate of penetration；7. carrying out measuring while drilling in test section evaluates its Rock Mass Integrality using the core Rockmass Block index under above-mentioned functional relation quick obtaining difference drilling depth with this.The purpose that core Rockmass Block index is rapidly and accurately obtained in drilling process may be implemented by research bit penetration, drilling rod velocity of rotation, the quantitative relationship of drilling machine hydraulic oil stress level and core Rockmass Block index in the present invention.Compared with traditional measurement mode, the method is simple and easy.
Description
Technical field
The invention belongs to engineering geology technical fields, and in particular to a method of test Rockmass Block index.
Background technique
Rockmass Block index (RBI) is to unload text recklessly to be equal to the article that 2002 deliver at " Journal of Hydraulic Engineering " " Rockmass Block refers to
Several and its engineering significance " in propose, be an overall target for characterizing Rockmass Block size and its structure type, it is reflected
It forms lumpiness (size) size of rock mass and its is combined with each other relationship, as a kind of important Rock Mass Integrality evaluation index, energy
It is enough rapidly and quantitatively to evaluate Rock Mass Integrality.
Rockmass Block index (RBI) be based on percentage shared by the complete situation of drilling core different length, is defined as:
By core length by 3~10,10~30,30~50,50~100 and the core pick-up rate greater than 100cm as weight and respectively
The cumulative obtained numerical value of corresponding coefficient product, calculation expression RBI=3Cr3+10Cr10+30Cr30+50Cr50+
100Cr100, in formula: Cr3, Cr10, Cr30, Cr50, Cr100 are respectively that core length is 3~10,10~30,30~50,50
The core pick-up rate of~100, > 100cm, are expressed as a percentage.
Many scholars are applied and have been developed to Rockmass Block index.Huang Runqiu be equal to 2011 " rock mechanics with
Engineering journal " Rockmass Block is referred in " analysis of silk screen I grades of power station Rockmass Block At Dam Foundation indexes quantization values " text for delivering
Several quantization values are analyzed and researched, and are established monolithic, bulk, secondary bulk, are inlayed, the classification of Rock-mass with cataclastic texture lumpiness index
Critical value.Poplar it is superfine in 2013 " Chinese Journal of Rock Mechanics and Engineering " deliver " the rock mass shearing resistance based on Copula theory is strong
Degree parameter estimation " correlation the rock mass such as RBI integrity metrics and Shear Strength parameter is analyzed in a text, it sends out
Higher negative correlativing relation is presented in existing RBI and cohesive strength c.Positive army's life was delivered equal to 2014 at " geotechnical engineering journal " " high-strength
Spend basement rock explosion pretreatment slurry shield and tunnel properties study ", Taishan core is evaluated respectively using Rockmass Block index and RQD in text
Power station intake tunnel quality of surrounding rock, acquired results are almost the same.High and refined " the probing rock delivered in 2016 at " railway construction "
Core is classified application of the Hoek-Brown criterion GSI in slope project " slope rock mass is proposed based on Rockmass Block index in a text
The linear quantitative index of structure type --- rock mass structure rate, by establishing between side slope drilling core and rock mass structure rate
Relationship can obtain the value of GSI by tabling look-up.Ni Weida is equal to be delivered " based on three-dimensional joint net for 2018 in " rock-soil mechanics "
Network simulation Dam Foundation Rock textural classification research ", text in based on Rockmass Block index propose three-dimensional equivalent Rockmass Block index 3D,
Carry out Dam Foundation Rock textural classification using RBI3D as evaluation index.Though the studies above has carried out certain sides to Rockmass Block index
The research and development in face, but it is mainly also limited to the research of mechanics and intensity scope, process is not obtained from core and is started with, i.e., simultaneously
Do not study between Rockmass Block index and drilling parameter it is potential contact, this causes its research achievement to be mainly theory analysis, no
With practical timeliness and the reliable reference value of reality.
There are close ties between Rock Mass Integrality and drilling parameter.Although monitoring while drilling technology oil gas drilling industry very
Generally, rate of penetration when especially monitoring or calculate probing, but in geotechnical engineering or engineering geology industry, the application of monitoring while drilling
Also seldom.First Chinese patent application CN201610858285.1 discloses a kind of monitoring while drilling technical testing rock strength
Method, although it also monitors drilling parameter, purpose is to measure rock mass strength, establish rock mass strength parameter and drilling parameter it
Between functional relation, rock mass strength parameter is mainly cohesive strength and internal friction angle, belongs to mechanics and intensity scope, will be with
Monitoring technology is bored for considering Rockmass Block index, Rock Mass Integrality can not be evaluated, and is correctly recognized and quantitative description
Integrity of rock mass is the basis for safely, effectively, being rationally designed construction.
Though needing boring coring in addition, having the research and practice of measurement Rockmass Block index at present, being taken compared to non-
The time spent in core probing, core drilling, is longer, and price is higher.Such as it is surveyed in the engineering that Shanxi goaf superstratum carries out
In examining, need boring and coring over one hundred a to carry out Rock Mass Integrality evaluation.The depth of these drillings is about 270m, non-core drilling
Time generally at 3 days or so, and the time of core drilling will often reach 10 days, be 3.3 times of non-core drilling；Non- coring
About 80 yuan/meter of the price of probing, and the price of core drilling will be added to 200 yuan/meter or so, be 2.5 times of non-coring drilling.
To sum up, non-core drilling has certain advantage in engineering, but there is presently no effective in non-core drill
The method of the Rockmass Block index of core is quick and precisely obtained in the case where spy, it is therefore necessary to improve to the prior art.
Summary of the invention
The purpose of the present invention is to provide it is a kind of using monitoring while drilling technology in the case where non-core drilling quick and precisely
The Rockmass Block index of core is obtained, Rock Mass Integrality evaluation is carried out, time cost can be saved, also can be reduced economic cost.
In an embodiment of the invention, a kind of side using monitoring while drilling technical testing Rockmass Block index is provided
Method includes the following steps:
Step 100, it selectes drilling machine position and levels drilling machine, the real-time measurement apparatus of drill bit displacement is installed on drilling machine, is bored
The real-time measurement apparatus of machine hydraulic fluid pressure, the real-time measurement apparatus of drilling rod velocity of rotation, data acquisition device；
Step 200, drilling machine and each real-time measurement apparatus and data acquisition device are opened, monitor and is recorded in drilling process
Drill bit displacement, drilling machine hydraulic oil pressure, drilling rod velocity of rotation, drilling time；
Step 300, drilling coring is carried out to the rock mass within the scope of certain depth in test site, be put in rock core box, and remembered
Record the coring beginning and ending time of each rock core box inner cores；Core length is measured, Rockmass Block index is calculated；
Step 400, by the drill bit displacement, drilling machine hydraulic oil pressure, drilling rod velocity of rotation, divide pure drilling journey with
Assisted process obtains the drill bit displacement acquired in pure drilling journey, drilling machine hydraulic oil pressure, drilling rod velocity of rotation, drilling time；Its
In, the step 300 and step 400 are limited without sequencing between each other；
Step 500, by dividing the drill bit acquired in obtained pure drilling journey displacement, drilling time, drilling is calculated
Speed；
Step 600, the functional relation between the Rockmass Block index and rate of penetration is established；
Step 700, carrying out measuring while drilling in test section can with quickly calculating test section according to resulting functional relation
The Rockmass Block index of layer.
Preferably, the real-time measurement apparatus of the drill bit displacement includes displacement sensor for pull rope and data cable, number
Displacement sensor is connected according to transmission cable one end, the other end connects data acquisition device.
Preferably, the real-time measurement apparatus of the drilling machine hydraulic oil pressure includes fluid pressure sensor and data transmission electricity
Cable, data cable one end connecting fluid pressure sensor, the other end connect data acquisition device.
Preferably, the real-time measurement apparatus of the drilling rod velocity of rotation includes that tachometer of measuring or rotational speed probe and data pass
Transmission cable, data cable one end connect tachometer of measuring or rotational speed probe, and the other end connects data acquisition device.
Preferably, the record time interval of the data acquisition device may be selected 0.1-5 seconds.
Preferably, the difference of pure drilling journey and assisted process is whether contact hole bed rock body and revolve in the step 400
Turn broken rock, in pure drilling journey, bit contact bottom hole rock mass simultaneously rotates broken rock, and in assisted process, drill bit does not creep into bottom hole
New rock mass, including sky bore, add drilling rod, pull out the processes such as drilling rod, shutdown.
Preferably, the calculation formula of the rate of penetration in the step 500 is that certain in pure drilling journey records in time interval
Drilling be displaced divided by the record time interval.
Preferably, the step of establishing functional relation in the step 600 are as follows:
Step 601, the drill bit displacement in the pure drilling journey is added up and obtains drilling depth；
Step 602, according to the coring beginning and ending time of core, the corresponding drilling depth range of this section of core and corresponding is obtained
Rockmass Block index；
Step 603, the rate of penetration within the scope of core drilling depth is obtained according to drilling depth and rate of penetration, and to this
Rate of penetration within the scope of drilling depth takes arithmetic average to obtain average rate of penetration；Wherein, the step 602 and step
603 limit without sequencing between each other；
Step 604, by average rate of penetration described in Rockmass Block index described in several groups step 602 and step 603
It is returned, obtains the functional relation of Rockmass Block index and rate of penetration.
Preferably, the functional relation of the Rockmass Block index and rate of penetration is analyzed according to Pearson linear dependence
Method show that specially RBI=4.97V-0.16, Pearson correlation coefficient r are 0.937.
Preferably, current by drilling machine according to the functional relation of Rockmass Block index and rate of penetration in step 700
The Rockmass Block index on rate of penetration calculating test section stratum.
The present invention has the following advantages compared to traditional measurement mode: the present invention is using the core of different Rock Mass Integralities in determination
The hydraulic fluid pressure level feature different with bit penetration under revolving speed, using monitoring while drilling technology to the rock mass block of core
Degree index is tested.By the quantitative relationship of research Rockmass Block index and drill bit rate of penetration, it can be achieved that in drilling process
In rapidly and accurately obtain Rockmass Block index, achieve the purpose that evaluate Rock Mass Integrality, it is specific as follows:
1) present invention establishes the functional relation of Rockmass Block index and rate of penetration, can count without a large amount of core drilling
The Rockmass Block index for calculating drilled strata, greatlys save drilling time and economic cost.
2) present invention establishes the functional relation of Rockmass Block index and rate of penetration, can provide in real time under current drilling depth
Rockmass Block index, have stronger timeliness.
3) present invention establishes the functional relation of Rockmass Block index and rate of penetration, to the ground of similar lithology in the neighbourhood
Layer can be used directly established functional relation and calculate Rockmass Block index, coring is not necessarily to, to similar lithology in the neighbourhood
Stratum has the reliable reference value of reality.
Detailed description of the invention
Fig. 1 is flow diagram of the present invention using the method for monitoring while drilling technical testing core Rockmass Block index；
Fig. 2 is the apparatus structure schematic diagram that the present invention utilizes monitoring while drilling technical testing core Rockmass Block index；
Fig. 3 be according to an embodiment of the present invention in part core of the pendulum in rock core box；
Fig. 4 is the partial trace that the rate of penetration in one embodiment of the invention changes with time；
Fig. 5 a is that drill bit obtained in one embodiment of the invention is displaced the partial trace changed over time；
Fig. 5 b is that the part that the cumulative obtained drilling depth of drill bit displacement changes over time in one embodiment of the invention is bent
Line；
Fig. 6 be according to an embodiment of the present invention obtained in the partial trace that changes with drilling depth of rate of penetration；
Fig. 7 is the core Rockmass Block index that middle foundation obtains according to an embodiment of the present invention and average rate of penetration V
Functional relation.
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, but not
Constitute limitation of the invention.Wherein description of symbols:
1- displacement sensor for pull rope；2- rotational speed probe；3- liquid-pressure pick-up；4- type vibration wire reader；5- is drawn
Rope displacement sensor data cable；6- rotational speed probe data cable；7- liquid-pressure pick-up data transmission electricity
Cable；8- drilling machine.
Specific embodiment
Understand in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below with reference to embodiment and attached
Figure, is described in further details the embodiment of the present invention.Here, illustrative embodiments and their description of the invention are for explaining this
Invention, but it is not as a limitation of the invention.
In the description of the present invention, it is to be understood that, term "comprises/comprising", " by ... form " or its is any
Other variants are intended to non-exclusive inclusion, so that product, equipment, process or method including a series of elements are not
Only include those elements, and can also include other elements that are not explicitly listed when needing, or it is this for further including
Product, equipment, process or the intrinsic element of method.In the absence of more restrictions, by sentence " including/packet
Contain ... ", " by ... form " element that limits, it is not excluded that it is including in the product of the element, equipment, process or method
There is also other identical elements.
Test site is Shanxi Province goaf.It, need to be mined out to this because building high-grade highway engineering in above goaf
The overlying strata soil body drill several in area.Overlying strata soil body 0-145m depth is the soil body on this, and 145-270m depth is rock mass.
The goaf seam mining time is 2006 to 2015 years.No. 3 coal seams of pit mining, mining method is inclined longwall
Coal-mining method, the rate of extraction 90%, roof control mode are whole caving method controls.Up to the present, mining area surface movement and deformation
Active period terminates substantially, and goaf place is basicly stable.
Referring to fig. 2, it is XY-4 type drilling machine that this, which tests drilling machine 8 used, and the real-time measurement apparatus of displacement selects drawstring displacement
The real-time measurement apparatus of sensor 1, drilling machine hydraulic oil pressure selects liquid-pressure pick-up 3, the real-time survey of drilling rod velocity of rotation
It measures device and selects rotational speed probe 2, the dataTaker DT80 that data acquisition device selects Beijing Shuo Tai Science and Technology Ltd. to produce
The record time interval of steel chord type type vibration wire reader 4, data acquisition device selects 1s.
Step 100, after selecting bore position and leveling drilling machine 8, by displacement sensor for pull rope 1 and displacement sensor for pull rope number
It is installed on 8 landing system side of drilling machine according to transmission cable 5, rod rotation speed probe 2 and rotational speed probe data cable 6 are installed on
8 rotary chuck side of drilling machine, liquid-pressure pick-up 3 and liquid-pressure pick-up data cable 7 are installed on the confession of drilling machine 8
On oil pipe；By displacement sensor for pull rope data cable 5, rotational speed probe data cable 6, liquid-pressure pick-up data
Transmission cable 7 is connected with dataTaker DT80 steel chord type type vibration wire reader 4.
Step 200, drilling machine 8 and the aforementioned each sensor being installed on drilling machine, probe and dataTaker DT80 steel are opened
String formula type vibration wire reader monitors the drill bit displacement obtained in drilling process, drilling machine hydraulic oil pressure, drilling rod velocity of rotation, bores
Into data such as times.
Step 300, drilling coring is carried out to the rock mass within the scope of in test site 145~270 meters, is put in rock core box (figure
3), and coring beginning and ending times of each rock core box inner cores is recorded；Core length is measured, Rockmass Block index is calculated.
It is specifically calculated using formula RBI=3Cr3+10Cr10+30Cr30+50Cr50+100Cr100, such as drilling machine is a certain
Round trip creeps into 4 meters, and the rock core length of taking-up is 3 meters, wherein the cumulative length of the core of 3~10cm range is 1m, then 3~10cm
Core pick-up rate to be exactly 1m be equal to 25% divided by 4m, and so on, obtain the core pick-up rate of each length range, can calculate
Obtain Rockmass Block index.
The measurement mode of core length can be measured with tape measure, at least be accurate to 1mm.
When step 400, by the displacement of drill bit described in step 200, drilling machine hydraulic oil pressure, drilling rod velocity of rotation, drilling
Between etc. data, determine it is pure drilling journey and assisted process discrimination standard (table 1), obtain it is pure drilling journey in acquire drill bit displacement,
The data such as drilling machine hydraulic oil pressure, drilling rod velocity of rotation, drilling time.
The discrimination standard of the pure drilling journey and assisted process of table 1
Step 500, the drill bit acquired in obtained pure drilling journey displacement, drilling time data, meter are divided by step 400
Calculation obtains rate of penetration (Fig. 4).
In the present invention, fixed time intervals acquire drill bit displacement, for example acquisition per second is primary, then drill bit displacement is divided by being separated by
Time obtain rate of penetration.
Step 600, the functional relation between Rockmass Block index and rate of penetration, step are established are as follows:
Step 601, the drill bit displacement (Fig. 5 a) in pure drilling journey is cumulative as drilling depth (Fig. 5 b).
Step 602, it according to the coring beginning and ending time of core, obtains taking each section of core corresponding within the scope of 145~270m
Drilling depth range and corresponding Rockmass Block index.
Step 603, the drilling within the scope of core drilling depth is obtained according to drilling depth (Fig. 5 b) and rate of penetration (Fig. 4)
Speed (Fig. 6).
The Rockmass Block index (RBI) of rate of penetration and institute coring within the scope of core drilling depth is analyzed
(table 2), the average rate of penetration in table refer to that counting for calculated rate of penetration in the coring depth bounds of each section of core is flat
Mean value, it is known that drilled strata lithology is mainly sandstone formation, and hydraulic fluid pressure level is maintained at 75kPa or so, and velocity of rotation is protected
It holds in 4r/s.
Each number core section lithology of table 2, RBI value and corresponding drilling parameter data
Step 604, according to Pearson linear dependence analysis method, can calculate the Rockmass Block index RBI of core with
Expression formula between corresponding average rate of penetration V is RBI=4.97V-0.16 (Fig. 7).Pearson correlation coefficient r is 0.937,
Show expression formula precision with higher.
Step 700, carry out measuring while drilling in test section, closed according to resulting Rockmass Block index and the function of rate of penetration
System, using average rate of penetration, can quickly calculate the Rockmass Block index of drilled strata.
The present invention utilizes rock mass footage per bit under determining hydraulic fluid pressure level and velocity of rotation of different integralities
The different feature of speed is tested using Rockmass Block index of the monitoring while drilling technology to core.By studying footage per bit
Speed, drilling machine hydraulic oil stress level, drilling rod velocity of rotation and Rockmass Block index quantitative relationship, it can be achieved that in drilling process
In rapidly and accurately obtain Rockmass Block index, achieve the purpose that evaluate Rock Mass Integrality.Compared with traditional measurement mode, this side
Method is simple and easy, and can provide the Rockmass Block index under current drilling depth in real time, evaluates its integrality.
The present invention has wide applicability, such as need to drill 100, this hair without carrying out a large amount of core drilling
Bright method only needs 1 hole of coring to can be obtained by the functional relation of RBI Yu drilling speed V, other 99 holes only need to carry out non-coring
Probing, with method of the invention you can get it RBI, and the calculated result precision with higher of the functional relation, Neng Gouyong
In the stratum body lumpiness index for differentiating similar lithology in the neighbourhood, drilling time and economic cost are greatlyd save, near
The stratum of the similar lithology in area has the reliable reference value of reality.
So far, though those skilled in the art will appreciate that the exemplary reality that present invention has been shown and described in detail herein
Example is applied, still, without departing from the spirit and scope of the present invention, still can be directly determined according to the present disclosure
Or derive many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the invention should be understood and defined as
Cover all such other variations or modifications.
Claims (10)
1. a kind of method using monitoring while drilling technical testing Rockmass Block index, which comprises the steps of:
Step 100, it selectes drilling machine position and levels drilling machine, the real-time measurement apparatus of drill bit displacement, drilling machine liquid are installed on drilling machine
The real-time measurement apparatus of oil pressure, the real-time measurement apparatus of drilling rod velocity of rotation, data acquisition device；
Step 200, drilling machine and each real-time measurement apparatus and data acquisition device, the brill in monitoring and record drilling process are opened
Head displacement, drilling machine hydraulic oil pressure, drilling rod velocity of rotation, drilling time；
Step 300, drilling coring is carried out to the rock mass within the scope of certain depth in test site, be put in rock core box, and recorded every
The coring beginning and ending time of one rock core box inner cores；Core length is measured, Rockmass Block index is calculated；
Step 400, by the drill bit displacement, drilling machine hydraulic oil pressure, drilling rod velocity of rotation, pure drilling journey and auxiliary are divided
Process obtains the drill bit displacement acquired in pure drilling journey, drilling machine hydraulic oil pressure, drilling rod velocity of rotation, drilling time；Wherein,
The step 300 and step 400 are limited without sequencing between each other；
Step 500, by dividing the drill bit acquired in obtained pure drilling journey displacement, drilling time, rate of penetration is calculated；
Step 600, the functional relation between the Rockmass Block index and rate of penetration is established；
Step 700, test section stratum can quickly be calculated according to resulting functional relation by carrying out measuring while drilling in test section
Rockmass Block index.
2. according to the method described in claim 1, it is characterized by: the real-time measurement apparatus of drill bit displacement includes drawstring position
Displacement sensor and data cable, data cable one end connect displacement sensor, and the other end connects data acquisition device.
3. according to the method described in claim 1, it is characterized by: the real-time measurement apparatus of the drilling machine hydraulic oil pressure includes
Fluid pressure sensor and data cable, data cable one end connecting fluid pressure sensor, other end connection number
According to acquisition device.
4. according to the method described in claim 1, it is characterized by: the real-time measurement apparatus of the drilling rod velocity of rotation includes turning
Fast measuring instrument or rotational speed probe and data cable, data cable one end connect tachometer of measuring or rotational speed probe, separately
One end connects data acquisition device.
5. according to the method described in claim 1, it is characterized by: the record time interval of the data acquisition device may be selected
0.1-5 seconds.
6. according to the method described in claim 1, it is characterized by: in the step 400 it is pure drilling journey and assisted process area
It is not whether contact hole bed rock body and rotate broken rock, in pure drilling journey, bit contact bottom hole rock mass simultaneously rotates broken rock, auxiliary
It helps in process, drill bit does not creep into the new rock mass of bottom hole, including sky bores, adds drilling rod, pulls out the processes such as drilling rod, shutdown.
7. according to the method described in claim 1, it is characterized by: the calculation formula of the rate of penetration in the step 500 is
Drilling in pure drilling journey in certain record time interval is displaced divided by the record time interval.
8. according to the method described in claim 1, it is characterized by: the step of establishing functional relation in the step 600 are as follows:
Step 601, the drill bit displacement in the pure drilling journey is added up and obtains drilling depth；
Step 602, according to the coring beginning and ending time of core, the corresponding drilling depth range of this section of core and corresponding rock mass are obtained
Lumpiness index；
Step 603, the rate of penetration within the scope of core drilling depth is obtained according to drilling depth and rate of penetration, and to the drilling
Rate of penetration in depth bounds takes arithmetic average to obtain average rate of penetration；Wherein, the step 602 and step 603 phase
It is limited between mutually without sequencing；
Step 604, average rate of penetration described in Rockmass Block index described in several groups step 602 and step 603 is carried out
It returns, obtains the functional relation of Rockmass Block index and rate of penetration.
9. according to the method described in claim 8, it is characterized by: the functional relation of the Rockmass Block index and rate of penetration
It is obtained according to Pearson linear dependence analysis method, specially RBI=4.97V-0.16, Pearson correlation coefficient r is
0.937。
10. according to the method described in claim 8, it is characterized by: according to Rockmass Block index and being crept into step 700
The functional relation of speed calculates the Rockmass Block index on test section stratum by the current rate of penetration of drilling machine.
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| CN110159250B (en) * | 2019-06-12 | 2024-04-19 | 深圳市勘察测绘院(集团)有限公司 | Geotechnical engineering investigation informationized integrated supervision equipment |
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| CN111855961A (en) * | 2020-07-24 | 2020-10-30 | 中南大学 | Rock mass drilling quality detection method, drilling machine, server and storage medium |
| CN111855961B (en) * | 2020-07-24 | 2021-10-26 | 中南大学 | Rock mass drilling quality detection method, drilling machine, server and storage medium |
| CN114017003A (en) * | 2021-11-03 | 2022-02-08 | 深圳市房屋安全和工程质量检测鉴定中心 | Intelligent core drilling monitoring system with early warning function and monitoring method |
| CN114483024A (en) * | 2022-04-18 | 2022-05-13 | 中国矿业大学(北京) | Rock burst grade in-situ evaluation and control design method |
| CN114483024B (en) * | 2022-04-18 | 2022-07-15 | 中国矿业大学(北京) | Rock burst grade in-situ evaluation and control design method |
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