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CN109057784A - The method of rock mass regular tenacity parameter is quickly determined using Rock Cutting intensity - Google Patents

The method of rock mass regular tenacity parameter is quickly determined using Rock Cutting intensity Download PDF

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CN109057784A
CN109057784A CN201810805370.0A CN201810805370A CN109057784A CN 109057784 A CN109057784 A CN 109057784A CN 201810805370 A CN201810805370 A CN 201810805370A CN 109057784 A CN109057784 A CN 109057784A
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rock
cutting
strength
bit
drilling
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李宁
何明明
宋玲
李骞
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Xian University of Technology
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Xian University of Technology
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/003—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by analysing drilling variables or conditions
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/005—Testing the nature of borehole walls or the formation by using drilling mud or cutting data

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

本发明公开的利用岩石切削强度快速确定岩体普通强度参数的方法，本发明利用岩石切削强度快速确定岩体普通强度参数的方法，通过现场试验的方法，以实现随钻识别岩石切削强度。通过岩石切削强度与岩石基本力学参数之间的关系，计算岩石的力学参数，如抗压强度、弹性模量、内摩擦角和粘聚力，本发明的方法，直接应用旋转触探测试所得结果开展岩石的抗压强度、弹性模量、内摩擦角和粘聚力计算,该方法仅需手工计算，计算过程简单，可以避免传统钻探取样及室内土工试验对地基土体的扰动和测试结果不准的影响。

The invention discloses a method for quickly determining the general strength parameters of a rock mass by utilizing the rock cutting strength. The method for rapidly determining the general strength parameters of the rock mass by using the rock cutting strength realizes identification of the rock cutting strength while drilling through a field test method. Through the relationship between the cutting strength of rock and the basic mechanical parameters of rock, the mechanical parameters of rock, such as compressive strength, elastic modulus, internal friction angle and cohesion, are calculated. The method of the present invention directly applies the results obtained by the rotary penetration test Carry out the calculation of compressive strength, elastic modulus, internal friction angle and cohesion of rock. This method only needs manual calculation, and the calculation process is simple, which can avoid the disturbance of foundation soil caused by traditional drilling sampling and indoor geotechnical test, and the test results are not accurate. standard impact.

Description

The method of rock mass regular tenacity parameter is quickly determined using Rock Cutting intensity
Technical field
The invention belongs to Geotechnical Engineering fields, and in particular to quickly determine that rock mass is commonly strong using Rock Cutting intensity Spend the method for parameter.
Background technique
How various rock mass engineering projects such as slope project, cavity engineering in foundation engineering, rapidly and accurately obtain rock mass mechanics Parameter is basis and the guarantee of the above various engineering designs, construction and Scheme of Strengthening.
The measuring method of Mechanics Parameters of Rock Mass generallys use the large-scale field test of indoor sillar specimen test and scene.It is indoor Sillar specimen test has the advantages that be easily obtained test result, but unfavorable disturbance factor causes the reality with Test in Situ Situation has differences；Disturbed for field test technology on site it is less, closer to rock mass on-site actual situations, but engineering It measures great, and is limited by various factors and restricts.Since indoor specimen test disturbs larger, field test test restriction It is more, expensive, time-consuming and laborious, seek the improved method or new technology that obtain Mechanics Parameters of Rock Mass, abandon drawback, realizes real Engineering site Mechanics Parameters of Rock Mass quickly test and be just particularly important.
Summary of the invention
The object of the present invention is to provide using Rock Cutting intensity quickly determine rock mass regular tenacity parameter method, to Quick obtaining rock mass regular tenacity parameter.
The technical scheme adopted by the invention is that quickly determining the side of rock mass regular tenacity parameter using Rock Cutting intensity Method is specifically implemented in accordance with the following steps:
Step 1 carries out the test of place rotation touch investigating to rock, obtains rotation touch investigating data；
Step 2, the data obtained to step 1 are handled, and obtain the average value of the rotation touch investigating drilling parameter on each stratum, The average value of average value and drilling pressure including rotation torque；
Step 3, the cutting hardness that each stratum in rock is calculated using the drilling parameter that step 2 obtains；
The cutting hardness on each stratum calculates the pressure resistance on each stratum in rock in step 4, the rock obtained using step 3 Degree, elasticity modulus, internal friction angle and cohesive strength.
The features of the present invention also characterized in that
In step 1, the place rotation touch investigating test includes in test rotation touch investigating drill bit at the uniform velocity injection stratum with depth Pressure, that is, drilling pressure of consecutive variations, unit MPa；Rotation torque, unit MNm；And it records in drill bit drilling process Cut contact area, unit m2, rotation touch investigating drill bit bottom surface radius, unit m.
Detailed process is as follows for step 2:
The rotation touch investigating measured data obtained according to step 1 draws the rotation touch investigating drilling pressure changed with depth of stratum Determine formation lithology title with the test curve of rotation torque, calculate each stratum and according to test curve Form division stratum The average value of rotation touch investigating drilling parameter, comprising: each stratum rotation touch investigating drilling pressure average value, unit MPa；Each stratum rotation Turn feeler inspection drill bit rotation torque average value, unit MNm.
In step 3, the calculation method of the cutting hardness on each stratum are as follows:
In formula (1), S is to cut contact area in drill bit drilling process, and P is drilling pressure, and M is rotation torque, R is drill bit Bottom surface radius, RMFor cutting hardness；When drill edge is crept into completely, think for cornual plate drill bit and spiral bit S is the lateral area of circular cone, for cornual plate drill bit S=2000.95mm2；For spiral bit S=1193.29mm2；For core drill Head thinks that S is the area of annulus, S=30.35mm2。
In step 4, the compression strength on each stratum in rock, elasticity modulus, internal friction angle and cohesive strength calculation method such as Under:
The calculation method of compressive strength of rock σ:
In formula (2), when using cornual plate bit cutting rock, a1=0.21, b1=1.04；Using spiral bit rock cutting When, a1=0.43, b1=0.05；When using hollow boring bit rock cutting, a1=4.4, b1=-6.1.
The calculation method of elastic modulus of rock E:
In formula (3), when using cornual plate bit cutting rock, a2=2.92, b2=1.04；Using spiral bit rock cutting When, a2=5.86, b2=0.06；When using hollow boring bit rock cutting, a2=59.57, b2=-6.02.
Internal friction angle of rockCalculation method:
In formula (4), when using cornual plate bit cutting rock, a3=0.01, b3=1.40；Using spiral bit rock cutting When, a3=0.03, b3=0.71；When using hollow boring bit rock cutting, a3=0.29, b3=1.57.
The calculation method of rock cohesion c:
In formula (5), when using cornual plate bit cutting rock, a4=0.16, b4=1.44；Using spiral bit rock cutting When, a4=0.32, b4=0.84；When using hollow boring bit rock cutting, a4=3.13, b4=2.28.
The beneficial effects of the present invention are:
The method that rock mass regular tenacity parameter is quickly determined using Rock Cutting intensity of the invention, directly application rotation touching Compression strength, elasticity modulus, internal friction angle and the cohesive strength that detection examination acquired results carry out rock calculate, and this method only needs craft It calculates, calculating process is simple, and when not using experiential modification coefficient, computational accuracy still with higher can be applied to soil Wood engineering field Rock Cutting Strength co-mputation is only needed calculating the parameter in basic cutting hardness from live rotation touch investigating examination It tests, it, can be inaccurate to the disturbance of foundation soil body and test result to avoid traditional drill sampling and laboratory soil test without probing Influence, simplify prospecting program, save prospecting cost, have a extensive future.
Detailed description of the invention
Fig. 1 is the flow chart for the method that the present invention quickly determines rock mass regular tenacity parameter using Rock Cutting intensity；
Fig. 2 is the relational graph between Elastic Modulus and cutting hardness of the present invention；
Fig. 3 is the relational graph in the present invention between compression strength and cutting hardness；
Fig. 4 is the relational graph in the present invention between cohesive strength and cutting hardness；
Fig. 5 is the relational graph in the present invention between internal friction angle and cutting hardness.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The method that the present invention quickly determines rock mass regular tenacity parameter using Rock Cutting intensity, passes through the side of field test Method identifies Rock Cutting intensity with brill to realize.Pass through the relationship between Rock Cutting intensity and rock basic mechanical parameter, meter The mechanics parameter for calculating rock, such as compression strength, elasticity modulus, internal friction angle and cohesive strength, as shown in Figure 1, specifically according to as follows Step is implemented:
Step 1 carries out the test of place rotation touch investigating to rock, obtains rotation touch investigating data:
With geotechnical engineering place rotation touch investigating vehicle, carry out rotation touch investigating field test, place rotation touching at pile foundation Detection examination includes pressure, that is, drilling pressure in test rotation touch investigating drill bit at the uniform velocity injection stratum with depth consecutive variations, and unit is MPa；Rotation torque, unit MNm, and record cutting contact area S, unit m in drill bit drilling process2；It is cut in drill bit It cuts in the case of sword creeps into completely, thinks that S is the lateral area of circular cone for cornual plate drill bit and spiral bit, for cornual plate drill bit S= 2000.95mm2；For spiral bit S=1193.29mm2；S, which is the area of annulus, S=, to be thought for hollow boring bit 30.35mm2；Rotation touch investigating drill bit bottom surface radius, unit m.
Step 2, the data obtained to step 1 are handled, and obtain the average value of the rotation touch investigating drilling parameter on each stratum, The average value of average value and drilling pressure including rotation torque；
The rotation touch investigating measured data obtained according to step 1 draws the rotation touch investigating drilling pressure changed with depth of stratum Determine formation lithology title with the test curve of rotation torque, calculate each stratum and according to test curve Form division stratum The average value of rotation touch investigating drilling parameter, comprising: each stratum rotation touch investigating drilling pressure average value, unit MPa；Each stratum rotation Turn feeler inspection drill bit rotation torque average value, unit MNm.
Step 3, the cutting hardness that each stratum in rock is calculated using the parameter that step 2 obtains:
In formula (1), S is to cut contact area in drill bit drilling process, and P is drilling pressure, and M is rotation torque, and R is drill bit Bottom surface radius, RMFor cutting hardness.When drill edge is crept into completely, think for cornual plate drill bit and spiral bit S is the lateral area of circular cone, for cornual plate drill bit S=2000.95mm2；For spiral bit S=1193.29mm2；For core drill Head thinks that S is the area of annulus, S=30.35mm2。
The cutting hardness on each stratum calculates the pressure resistance on each stratum in rock in step 4, the rock obtained using step 3 Degree, elasticity modulus, internal friction angle and cohesive strength, Fig. 2~Fig. 5 are respectively elasticity modulus, compression strength, cohesive strength and internal friction angle Relational graph between cutting hardness；
Wherein, the calculation method of compressive strength of rock σ:
In formula (2), when using cornual plate bit cutting rock, a1=0.21, b1=1.04；Using spiral bit rock cutting When, a1=0.43, b1=0.05；When using hollow boring bit rock cutting, a1=4.4, b1=-6.1.
The calculation method of elastic modulus of rock E:
In formula (3), when using cornual plate bit cutting rock, a2=2.92, b2=1.04；Using spiral bit rock cutting When, a2=5.86, b2=0.06；When using hollow boring bit rock cutting, a2=59.57, b2=-6.02.
Internal friction angle of rockCalculation method:
In formula (4), when using cornual plate bit cutting rock, a3=0.01, b3=1.40；Using spiral bit rock cutting When, a3=0.03, b3=0.71；When using hollow boring bit rock cutting, a3=0.29, b3=1.57.
The calculation method of rock cohesion c:
In formula (5), when using cornual plate bit cutting rock, a4=0.16, b4=1.44；Using spiral bit rock cutting When, a4=0.32, b4=0.84；When using hollow boring bit rock cutting, a4=3.13, b4=2.28.
The present invention directly applies rotation touch investigating test acquired results to carry out Rock Cutting Strength co-mputation, and this method only needs craft It calculates, calculating process is simple, and when not using experiential modification coefficient, computational accuracy still with higher can be applied to soil Wood engineering field Rock Cutting Strength co-mputation.Basic cutting hardness is carried out using the method for the present invention, calculating parameter is only needed from existing The test of rotation touch investigating can disturbance and survey to avoid traditional drill sampling, laboratory soil test to foundation soil body without probing The inaccurate influence of test result simplifies prospecting program, saves prospecting cost, has a extensive future.
The mechanics parameter for the rock that method of the invention obtains is compared with actual measured results, such as table 1.
The comparison of result and actual result that table 1 is obtained using method of the invention
It can see that the mechanics parameter for the rock that method of the invention is calculated is basic and actual result is close from table 1, For global error less than 5%, this is able to satisfy engine request completely, therefore, illustrates the rock regular tenacity that method of the invention measures Parameter the result is that reliable.

Claims (5)

1.利用岩石切削强度快速确定岩体普通强度参数的方法，其特征在于，具体按照如下步骤实施：1. utilize rock cutting strength to determine the method for rock mass general strength parameter fast, it is characterized in that, specifically implement according to the following steps: 步骤1、对岩石进行场地旋转触探测试，获得旋转触探数据；Step 1. Carry out the site rotary penetration test on the rock, and obtain the rotary penetration test data; 步骤2、对步骤1获得的数据进行处理，得到各地层的旋转触探钻进参数的平均值，包括旋转扭矩的平均值和钻进压力的平均值；Step 2, process the data obtained in step 1 to obtain the average value of the rotary penetration penetration drilling parameters of each formation, including the average value of the rotational torque and the average value of the drilling pressure; 步骤3、利用步骤2得到的钻进参数计算出岩石中各地层的切削强度；Step 3, using the drilling parameters obtained in step 2 to calculate the cutting strength of each formation in the rock; 步骤4、利用步骤3得到的岩石中各地层的切削强度计算岩石中各地层的抗压强度、弹性模量、内摩擦角和粘聚力。Step 4, using the cutting strength of each layer in the rock obtained in step 3 to calculate the compressive strength, elastic modulus, internal friction angle and cohesion of each layer in the rock. 2.如权利要求1所述的利用岩石切削强度快速确定岩体普通强度参数的方法，其特征在于，步骤1中，所述场地旋转触探测试包括测试旋转触探钻头匀速贯入地层中随深度连续变化的压力即钻进压力，单位为MPa；旋转扭矩，单位为MN·m；并记录钻头钻进过程中切削接触面积，单位为m2；旋转触探钻头底面半径，单位为m。2. the method for determining the general strength parameter of rock mass quickly by utilizing rock cutting strength as claimed in claim 1, it is characterized in that, in step 1, the rotating penetrating sounding test of the site comprises testing that the rotating penetrating sounding drill bit penetrates into the formation at a uniform speed The pressure continuously changing at depth is the drilling pressure, in MPa; the rotation torque, in MN m; and record the cutting contact area during the drilling process, in m 2 ; the radius of the bottom surface of the rotary penetration drilling bit, in m. 3.如权利要求1所述的利用岩石切削强度快速确定岩体普通强度参数的方法，其特征在于，步骤2的具体过程如下：3. the method for determining the general strength parameter of rock mass quickly by utilizing rock cutting strength as claimed in claim 1, is characterized in that, the concrete process of step 2 is as follows: 根据步骤1得到的旋转触探实测数据，绘制随地层深度变化的旋转触探钻进压力和旋转扭矩的测试曲线，并根据测试曲线形态划分地层，判定地层岩性名称，计算出各地层旋转触探钻进参数的平均值，包括：各地层旋转触探钻进压力平均值，单位为MPa；各地层旋转触探钻头旋转扭矩平均值，单位为MN·m。According to the rotary penetration testing data obtained in step 1, draw the test curve of the rotary penetration penetration drilling pressure and rotation torque that varies with the formation depth, and divide the formation according to the shape of the test curve, determine the lithology name of the formation, and calculate the rotary penetration penetration test of each formation. The average value of the drilling parameters, including: the average rotary penetration drilling pressure of each formation, in MPa; the average rotation torque of the rotary penetration drill bit in each formation, in MN·m. 4.如权利要求1所述的利用岩石切削强度快速确定岩体普通强度参数的方法，其特征在于，步骤3中，各地层的切削强度的计算方法为：4. the method for determining the general strength parameter of rock mass quickly by utilizing rock cutting strength as claimed in claim 1, is characterized in that, in step 3, the computing method of the cutting strength of each stratum is: 式(1)中，S为钻头钻进过程中切削接触面积，P为钻进压力，M为旋转扭矩，R为钻头的底面半径，RM为切削强度；在钻头切削刃完全钻进情况下，针对角片钻头和麻花钻头认为S为圆锥的侧面积，对于角片钻头S＝2000.95mm2；对于麻花钻头S＝1193.29mm2；对于空心钻头认为S为圆环的面积，S＝30.35mm2。In formula (1), S is the cutting contact area during the drilling process of the drill bit, P is the drilling pressure, M is the rotational torque, R is the bottom surface radius of the drill bit, and R M is the cutting strength; when the cutting edge of the drill bit is fully drilled , S is considered to be the lateral area of the cone for corner piece drills and twist drills, for corner piece drills S=2000.95mm 2 ; for twist drills S=1193.29mm 2 ; for hollow drills, S is the area of the ring, S=30.35mm 2 . 5.如权利要求1所述的利用岩石切削强度快速确定岩体普通强度参数的方法，其特征在于，步骤4中，岩石中各地层的抗压强度、弹性模量、内摩擦角和粘聚力的计算方法如下：5. the method for determining the general strength parameter of rock mass quickly by utilizing rock cutting strength as claimed in claim 1, is characterized in that, in step 4, the compressive strength, modulus of elasticity, internal friction angle and cohesion of each stratum in the rock The force calculation method is as follows: 岩石抗压强度σ的计算方法：Calculation method of rock compressive strength σ: 式(2)中，采用角片钻头切削岩石时，a1＝0.21，b1＝1.04；采用麻花钻头切削岩石时，a1＝0.43，b1＝0.05；采用空心钻头切削岩石时，a1＝4.4，b1＝-6.1。In formula (2), a 1 = 0.21, b 1 = 1.04 when cutting rock with an angle bit; a 1 = 0.43, b 1 = 0.05 when cutting rock with a twist drill; a 1 = 0.05 when cutting rock with a hollow drill =4.4, b 1 =-6.1. 岩石弹性模量E的计算方法：Calculation method of rock elastic modulus E: 式(3)中，采用角片钻头切削岩石时，a2＝2.92，b2＝1.04；采用麻花钻头切削岩石时，a2＝5.86，b2＝0.06；采用空心钻头切削岩石时，a2＝59.57，b2＝-6.02。In formula (3), a 2 = 2.92, b 2 = 1.04 when the angle bit is used to cut rock; a 2 = 5.86, b 2 = 0.06 when a twist drill is used to cut rock; a 2 =59.57, b 2 =-6.02. 岩石内摩擦角的计算方法：rock internal friction angle Calculation method: 式(4)中，采用角片钻头切削岩石时，a3＝0.01，b3＝1.40；采用麻花钻头切削岩石时，a3＝0.03，b3＝0.71；采用空心钻头切削岩石时，a3＝0.29，b3＝1.57。In formula (4), a 3 = 0.01, b 3 = 1.40 when cutting rock with an angle bit; a 3 = 0.03 and b 3 = 0.71 when cutting rock with a twist drill; a 3 = 0.03 when cutting rock with a hollow drill =0.29, b 3 =1.57. 岩石粘聚力c的计算方法：Calculation method of rock cohesion c: 式(5)中，采用角片钻头切削岩石时，a4＝0.16，b4＝1.44；采用麻花钻头切削岩石时，a4＝0.32，b4＝0.84；采用空心钻头切削岩石时，a4＝3.13，b4＝2.28。In formula (5), a 4 = 0.16, b 4 = 1.44 when the angle piece bit is used to cut the rock; a 4 = 0.32, b 4 = 0.84 when the twist bit is used to cut the rock ; =3.13, b 4 =2.28.
CN201810805370.0A 2018-07-20 2018-07-20 The method of rock mass regular tenacity parameter is quickly determined using Rock Cutting intensity Pending CN109057784A (en)

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CN114630950A (en) * 2019-09-04 2022-06-14 艾尼股份公司 Downhole rock mechanics property tool, assembly and method
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Application publication date: 20181221