CN105628499A - Method for confirming breakage parameter of rock - Google Patents
Method for confirming breakage parameter of rock Download PDFInfo
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- CN105628499A CN105628499A CN201510970006.6A CN201510970006A CN105628499A CN 105628499 A CN105628499 A CN 105628499A CN 201510970006 A CN201510970006 A CN 201510970006A CN 105628499 A CN105628499 A CN 105628499A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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Abstract
The invention discloses a method for confirming breakage parameters of rock. According to a specific embodiment, the method comprises the following steps: applying pressure to a spherical rock test sample with prefabricated cracks; recording the angle between the direction of the applied pressure and the direction of the prefabricated cracks, and the value of the applied pressure; confirming the breakage parameters of the rock according to the angle and the value of the applied pressure. Due to the implementation mode, the breakage parameters of the rock can be relatively accurately confirmed, and the method is relatively wide in application range.
Description
Technical field
The application relates to Geotechnical Engineering field, is specifically related to material properties of rock field tests, particularly relates to the defining method of the fragmentation parameters of rock.
Background technology
Along with the mankind are to deepening continuously that natural resources exploitation utilizes, superficial part resource reduces day by day, and exploitation enters the deep rock mass engineering project stage. High-ground stress residing for deep rock mass, High-geotemperature, Thief zone water pressure environment, the mechanical response of the mechanical response of deep rock mass and superficial part rock has significant difference.
Rock fracture mechanics is with rock fracture toughness for basic parameter, with rock material crackle and expansion process for research contents, to probe into rock material fracture mechanism for goal in research. To in the engineering activities such as the drilling well of rock, excavation, explosion, cutting, the principle of rock fracture mechanics, method and the intensity of technical Analysis rock texture, stability and the problem such as break can be used; Rock fracture force theory be effectively applied to the relevant rock mass in rock mass engineering project field cave in unstability, cracks can spread research in the middle of, the correlation engineering contributing to solving well rock mass engineering project aspect is actual.
The accuracy of the fracture parameter test of rock, has important directive significance for actual deep rock mass engineering project. Existing method of testing cannot be applied to be widely applied prospect at present, it is impossible to meets urgent performances of rock testing requirement. How to improve the accuracy of test, in order to better deep rock mass engineering project must be instructed actual, be the target constantly pursued of current rock mechanics field. .
Summary of the invention
The purpose of the application is in that to propose the defining method of the fragmentation parameters of the rock of a kind of improvement, solves the technical problem that background section above is mentioned.
This application provides the defining method of the fragmentation parameters of a kind of rock, described method includes:
To the spherical rock sample on-load pressure being provided with precrack; Record the numerical value of the pressure of the angle value between direction and the precrack direction of the pressure loaded and loading; The fragmentation parameters of described rock is determined based on the numerical value of described angle value and the pressure of described loading.
In certain embodiments, the pressure of described loading include following at least one: uniaxial pressure, confined pressure, pore fluid pressure, wherein, described uniaxial pressure refers to and loads pressure in a single direction.
In certain embodiments, described fragmentation parameters include following at least one: opening mode fracture toughness, slide mode fracture toughness, tearing mode fracture toughness.
In certain embodiments, described spherical rock sample includes the precrack running through described spherical rock sample, and described precrack arranges with the diameter place straight line of described spherical rock sample for axis of symmetry and is positioned at this axis of symmetry institute planar.
In certain embodiments, described spherical rock sample includes the circular hole running through described spherical rock sample, and described circular hole is with the axis of symmetry of described precrack for axis.
In certain embodiments, described method also includes: arrange precrack on spherical rock sample, and wherein, the depth value of described precrack is arranged based on the diameter of described spherical rock sample.
In certain embodiments, described spherical rock sample includes two precracks, and described depth value is the 1/20��1/10 of described diameter.
In certain embodiments, it is characterized in that, the described numerical value based on described angle value and the pressure of described loading determines that the fragmentation parameters of described rock includes: obtain the critical data broken of described spherical rock sample, described in the critical data that breaks include the numerical value of pressure of the angle value between direction and the precrack direction of uniaxial pressure loaded when spherical rock sample breaks and loading; The fragmentation parameters of described rock is determined based on the described critical data broken.
In certain embodiments, described determine that the fragmentation parameters of described rock includes based on the described critical data broken:
The fragmentation parameters of rock described in the critical data that breaks based on described, the feature calculation of described spherical rock sample, described feature includes the depth value of the diameter of described spherical rock sample, described precrack.
In certain embodiments, described break based on described critical data, described spherical rock sample feature calculation described in the fragmentation parameters of rock include: based on the critical data broken of at least one spherical rock sample, this spherical rock sample feature calculation described in the fragmentation parameters of rock.
The defining method of the fragmentation parameters of the rock that the application provides, by to the spherical rock sample on-load pressure being provided with precrack, and record the numerical value of the pressure of the angle value between the direction of the pressure of loading and precrack direction and loading, the numerical value being finally based on the pressure of angle value and loading determines the fragmentation parameters of rock, the method makes the determination of the fragmentation parameters of rock more accurate, and the scope of application is more extensive.
Accompanying drawing explanation
By reading the detailed description that non-limiting example is made made with reference to the following drawings, other features, purpose and advantage will become more apparent upon:
Fig. 1 a is a kind of example arrangement schematic diagram of the spherical rock sample that can apply to the application;
Fig. 1 b is the schematic diagram of a scene loading uniaxial pressure of the defining method of the fragmentation parameters of the rock according to the application;
Fig. 1 c is the schematic diagram of the scene of an on-load pressure of the defining method of the fragmentation parameters of the rock according to the application;
Fig. 2 is the flow chart of an embodiment of the defining method of the fragmentation parameters of the rock according to the application;
Fig. 3 is the flow chart of another embodiment of the defining method of the fragmentation parameters of the rock according to the application;
Fig. 4 is a kind of exemplary process diagram of the preparation method of the spherical rock sample of the defining method of the fragmentation parameters of the rock that can apply to the application.
Detailed description of the invention
Below in conjunction with drawings and Examples, the application is described in further detail. It is understood that specific embodiment described herein is used only for explaining related invention, but not the restriction to this invention. It also should be noted that, for the ease of describing, accompanying drawing illustrate only the part relevant to about invention.
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined. Describe the application below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Refer to a kind of example arrangement schematic diagram that Fig. 1 a and Fig. 2, Fig. 1 a is the spherical rock sample that can apply to the application. Fig. 2 illustrates the flow process 200 of an embodiment of the defining method of the fragmentation parameters of the rock according to the application. The defining method of the fragmentation parameters of above-mentioned rock, comprises the following steps:
Step 201, to the spherical rock sample on-load pressure being provided with precrack.
As shown in Figure 1a, in the present embodiment, rock sample is spherical, and is previously provided with precrack 101. By processing rock mass, it is possible to obtain the spherical rock sample 100 for testing.
In some optional implementations of the present embodiment, precrack 101 is arranged with the diameter place straight line of spherical rock sample 100 for axis of symmetry, and precrack 101 is positioned at this diameter institute planar. Above-mentioned spherical rock sample 100 includes at least one precrack 101. Exemplarily, it is possible to arrange a precrack, this precrack self is zhou duicheng tuxing, and with the diameter of spherical rock sample for axis of symmetry. As another example, it is also possible to arrange two precracks, these two precracks are with the diameter place straight line of spherical rock sample for axis of symmetry, and these two precracks are all coplanar with its axis of symmetry.
In some optional implementations of the present embodiment, spherical rock sample 100 includes the precrack 101 running through spherical rock sample. Precrack 101 runs through spherical rock sample 100 and refers to that precrack has at least two ends to connect with the outer surface of spherical rock sample.
In some optional implementations of the present embodiment, the type of precrack include but not limited to following any one: vertical crack, V-type crackle. Above-mentioned vertical crack refers to that the cross section of crackle is the crackle of rectangle; The cross section that above-mentioned V-type crackle refers to crackle is the crackle of V-type.
In some optional implementations of the present embodiment, above-mentioned spherical rock sample includes circular hole 102, and above-mentioned circular hole 102 runs through spherical rock sample 100, and above-mentioned circular hole 102 is with the axis of symmetry of above-mentioned precrack 101 for axis.
In some optional implementations of the present embodiment, before to the spherical rock sample on-load pressure being provided with precrack, spherical rock sample arranges precrack, wherein, the depth value of above-mentioned precrack is set based on the diameter of above-mentioned spherical rock sample.
In some optional implementations of the present embodiment, above-mentioned spherical rock sample includes two precracks, and above-mentioned depth value is the 1/20��1/10 of above-mentioned diameter. Above-mentioned precrack is vertical crack. Exemplarily, the diameter of circular hole is the 1/20 of spherical rock sample, and the width value of precrack is the 1/100 of spherical rock sample diameter, and the depth value of precrack is the 1/20��1/10 of spherical rock sample diameter.
In the present embodiment, it is possible to select but be not limited to use pressure-loaded instrument to spherical rock sample on-load pressure. Here, pressure-loaded instrument refer to commercially available can to the instrument of above-mentioned spherical rock sample on-load pressure. Preferably, choose and can load, to above-mentioned spherical rock sample, the pressure-loaded instrument that may determine that direction and numerical value. Because pressure-loaded instrument is well known to those skilled in the art, therefore not to repeat here.
In some optional implementations of the present embodiment, the pressure of above-mentioned loading include following at least one: uniaxial pressure, confined pressure, pore fluid pressure, above-mentioned uniaxial pressure refers to and loads pressure in a single direction. Exemplarily, refer to Fig. 1 b, it illustrates the schematic diagram of a scene loading uniaxial pressure. When loading uniaxial pressure, first, the spherical rock sample 100 being provided with precrack is placed on the pressure-loaded platform of uniaxial pressure testing machine, the axis of symmetry of precrack 101 is adjusted to level, precrack 101 is adjusted to vertical state. Secondly, adjusting uniaxial pressure testing machine, above-mentioned spherical rock sample 100 is carried out prestrain, the purpose of above-mentioned prestrain includes but not limited to confirm that spherical rock sample 100 is good with the pressure-loaded component contact of uniaxial pressure testing machine. Then, spherical rock sample 100 is loaded uniaxial pressure, until spherical rock sample 100 breaks.
In some optional implementations of the present embodiment, the mode choosing load or rate of displacement controls the loading procedure of pressure.
In some optional implementations of the present embodiment, the force value that spherical rock sample is loaded increases from small to large, until spherical rock sample breaks. The increment of the pressure loaded can be identical, it is also possible to on-load pressure in the way of increment is sequentially reduced.
Step 202, records the numerical value of the pressure of the angle value between direction and the precrack direction of the pressure loaded and loading.
In the present embodiment, it is determined that angle value between the direction of the precrack of spherical rock sample and the pressure of loading record, when above-mentioned angle value is determined, the numerical value of the pressure that record loads.
In some optional implementations of the present embodiment, it is determined that angle value between direction and the precrack direction of the uniaxial pressure of loading record, the confined pressure of loading, the direction of pore fluid pressure are designated as 0 with the direction of precrack.
In some optional implementations of the present embodiment, the numerical value of the pressure that record loads includes: the numerical value of the pressure that predetermined mode record loads. Exemplarily, the force value loaded each time is recorded during on-load pressure. Exemplarily, at the initial stage during on-load pressure, three pressure, the value of the pressure that record once loads often are loaded; On-load pressure, after certain numerical value, records the force value loaded each time.
In some optional implementations of the present embodiment, the multiple spherical rock sample of previously prepared same rock mass, the parameter of multiple spherical rock samples is identical, and the parameter of spherical rock sample refers to the type etc. of the diameter of spherical rock sample, precrack. Angle value between precrack and the loading direction of pressure of different spherical rock samples is different.
Step 203, determines the fragmentation parameters of above-mentioned rock based on the numerical value of above-mentioned angle value and the pressure of above-mentioned loading.
In some optional implementations of the present embodiment, above-mentioned fragmentation parameters includes at least one in the compound toughness of opening mode fracture toughness, slide mode fracture toughness, tearing mode fracture toughness or above-mentioned several fracture toughness. Above-mentioned opening mode fracture toughness is that tension is perpendicular to cracks can spread face, and crackle opens along force direction, the fracture toughness under crack surface spread scenarios; Above-mentioned slide mode fracture toughness refers to that shearing stress parallel action is in crack surface, and vertical with fault line, and crackle is along the parallel fracture toughness sliped off under spread scenarios of crack surface; Above-mentioned tearing mode fracture toughness refers to that shearing stress parallel action is in crack surface, and parallel with fault line, crackle tear spread scenarios along crack surface under fracture toughness.
In the present embodiment, different according to the angle value between precrack from pressure-loaded direction, it is determined that different types of fragmentation parameters.
In some optional implementations of the present embodiment, the fracture toughness type determined changes according to above-mentioned angle value, for instance, when the angle between precrack and pressure-loaded direction is 0 degree, value according to loaded pressure, it is determined that the slide mode fracture toughness of this rock.
The method that above-described embodiment of the application provides is by the spherical rock sample on-load pressure being provided with precrack, and record the numerical value of the pressure of the angle value between the direction of the pressure of loading and precrack direction and loading, the numerical value being finally based on the pressure of angle value and loading determines the fragmentation parameters of rock, the method makes the determination of the fragmentation parameters of rock more accurate, and the scope of application is more extensive.
With continued reference to Fig. 3 and Fig. 1 c, wherein, Fig. 3 illustrates the flow process 300 of an embodiment of the defining method of the fragmentation parameters of the rock according to the application. Fig. 1 c illustrates the schematic diagram of the scene of an on-load pressure. The defining method of the fragmentation parameters of above-mentioned rock, comprises the following steps:
Step 301, loads uniaxial pressure, confined pressure and pore fluid pressure to the spherical rock sample being provided with precrack.
In the present embodiment, rock sample is spherical, and is previously provided with precrack 101. By processing rock mass, it is possible to obtain the spherical rock sample 100 for testing.
In some optional implementations of the present embodiment, precrack 101 is arranged with the diameter place straight line of spherical rock sample 100 for axis of symmetry, and precrack 101 is positioned at this diameter institute planar. Above-mentioned spherical rock sample 100 includes at least one precrack 101. Exemplarily, it is possible to arrange a precrack, this precrack self is zhou duicheng tuxing, and with the diameter of spherical rock sample for axis of symmetry. As another example, it is also possible to arrange two precracks, these two precracks are with the diameter place straight line of spherical rock sample for axis of symmetry, and these two precracks are all coplanar with its axis of symmetry.
In some optional implementations of the present embodiment, spherical rock sample 100 includes the precrack 101 running through spherical rock sample. Precrack 101 runs through spherical rock sample 100 and refers to that precrack has at least two ends to connect with the outer surface of spherical rock sample.
In some optional implementations of the present embodiment, before to spherical rock sample on-load pressure, processing in advance is easy to spherical rock sample is loaded the pressure chamber 103 of confined pressure, and the inside of this pressure chamber 103 can be the optional one of following shape: cylindrical, cube shaped. Exemplarily, above-mentioned pressure chamber 103 is cylindrical, wherein, the internal diameter of above-mentioned cylindrical pressure chamber is slightly larger than the diameter of spherical rock sample, and above-mentioned pressure chamber is provided with the pressure-loaded passage loading uniaxial pressure in vertical direction, Plumb load platform loads passage by above-mentioned uniaxial pressure and passes in and out above-mentioned pressure chamber.
In some optional implementations of the present embodiment, spherical rock sample is placed on the Plumb load platform of stress test instrument, then pressure chamber is socketed in the outside of the Plumb load platform of stress test instrument and fixes. Then, adjust Plumb load position of platform, above-mentioned spherical rock sample is loaded certain initial uniaxial pressure, to above-mentioned spherical rock sample prestrain confined pressure.
In some optional implementations of the present embodiment, the mode choosing load or rate of displacement controls the loading procedure of pressure.
In some optional implementations of the present embodiment, the force value that spherical rock sample is loaded increases from small to large, until spherical rock sample breaks. The increment of the pressure loaded can be identical, it is also possible to on-load pressure in the way of increment is sequentially reduced.
Step 302, records the numerical value of the pressure of the angle value between direction and the precrack direction of the pressure loaded and loading.
In the present embodiment, it is determined that angle value between direction and the precrack direction of the uniaxial pressure of loading record, the confined pressure of loading, the direction of pore fluid pressure are designated as 0 with the direction of precrack.
In the present embodiment, the angle value between direction and the precrack direction of the uniaxial pressure loaded is determined, record loads the numerical value of uniaxial pressure, confined pressure and pore fluid pressure.
In some optional implementations of the present embodiment, during on-load pressure, record the force value loaded each time.
In some optional implementations of the present embodiment, the multiple spherical rock sample of previously prepared same rock mass, the parameter of multiple spherical rock samples is identical, and the parameter of spherical rock sample refers to the mode etc. that the diameter of spherical rock sample, precrack are arranged. Angle value between precrack and the loading direction of pressure of different spherical rock samples is different.
In some optional implementations of the present embodiment, the force value that spherical rock sample is loaded increases from small to large, until spherical rock sample breaks. The increment of the pressure loaded can be identical, it is also possible to arranges in the way of increment is sequentially reduced.
Step 303, obtains the critical data broken of above-mentioned spherical rock sample.
In the present embodiment, the numerical value of the above-mentioned critical data broken includes determining between direction and the precrack direction of the uniaxial pressure of loading when spherical rock sample breaks angle value, the numerical value of uniaxial pressure, the numerical value of confined pressure and pore fluid pressure.
Step 304, determines the fragmentation parameters of rock based on the critical data broken.
In the present embodiment, based on the critical data broken, the stress intensity factor that under confined pressure and pore pressure combined effect, precrack is most advanced and sophisticated is calculated, it is determined that confined pressure and the fragmentation parameters of rock under pore fluid pressure combined effect.
In some optional implementations of the present embodiment, above-mentioned determine that the fragmentation parameters of above-mentioned rock includes based on the described critical data broken: the fragmentation parameters of rock described in the critical data that breaks based on described, the feature calculation of described spherical rock sample, features described above includes the depth value of the diameter of above-mentioned spherical rock sample, above-mentioned precrack. Alternatively, features described above also includes the width value of above-mentioned precrack.
In some optional implementations of the present embodiment, based on the critical data broken of at least one spherical rock sample, this spherical rock sample feature calculation described in the fragmentation parameters of rock. Exemplarily, the multiple spherical rock sample of previously prepared same rock mass, the parameter of multiple spherical rock samples is identical, and the parameter of spherical rock sample refers to the type etc. of the diameter of spherical rock sample, precrack. Angle value between precrack and the loading direction of pressure of different spherical rock samples is different.
In some optional implementations of the present embodiment, above-mentioned fragmentation parameters includes at least one in the compound toughness of opening mode fracture toughness, slide mode fracture toughness, tearing mode fracture toughness or above-mentioned several fracture toughness.
As can be seen from Figure 3, compared with the embodiment that Fig. 2 is corresponding, the flow process 300 of the defining method of the fragmentation parameters of the rock in the present embodiment highlights the determination of the fragmentation parameters when having confined pressure and pore fluid pressure, and determines that fragmentation parameters is the numerical value choosing pressure loaded when spherical rock sample breaks. The determined fragmentation parameters of the present embodiment can more accurately be useful in deep engineering reality.
With continued reference to Fig. 4, it illustrates a kind of exemplary flow 400 of the preparation method of the spherical rock sample of the defining method of the fragmentation parameters of the rock that can apply to the application.
Step 401, prepares spherical sample from rock mass.
In the present embodiment, adopting stone ball process equipment, process spherical sample, wherein, the diameter of spherical sample is determined according to testing program.
Step 402, processes cubic box.
In the present embodiment, processing a cubic box, box upper and lower surface center is respectively arranged with a circular hole, and four sides of cubic box are also respectively arranged with a screwed hole, and are furnished with corresponding screw.
In some optional implementations of the present embodiment, box upper and lower surface Circularhole diameter is the 1/10 of spherical rock sample diameter.
Step 403, spherical sample is fixed in cubic box, processes circular hole.
In the present embodiment, being put in cubic box by spherical sample, then above-mentioned spherical sample is fixed in cubic box. The spherical sample being fixed in box and box are placed on drilling and milling machine, fixing above-mentioned box, the drill bit of selected diameter is directed at the circular hole of box upper surface, on spherical sample, then gets out circular hole, above-mentioned circular hole runs through above-mentioned spherical sample.
Step 404, processes precrack.
In the present embodiment, spherical sample is fixed on the object stage of diamond wire saw machine, then by diamond wire through above-mentioned circular hole, carries out line cutting according to preliminary dimension, cut out the precrack of the predetermined degree of depth.
In some optional implementations of the present embodiment, arranging two precracks, these two precracks are with the diameter place straight line of spherical rock sample for axis of symmetry, and these two precracks are all coplanar with its axis of symmetry. By diamond wire through above-mentioned circular hole, carry out line cutting according to preliminary dimension, cut out the first precrack and second precrack of the predetermined degree of depth.
The preparation method of the spherical sample that above-described embodiment of the application provides by preparing spherical sample from rock mass; Processing cubic box; Spherical sample is fixed in cubic box, processes circular hole; Processing precrack. Achieve high efficiency and the accuracy of the preparation of the spherical rock sample of spherical rock sample of the defining method of the fragmentation parameters of the rock that can apply to the application.
It will be understood by those skilled in the art that the preparation method 400 of above-mentioned ball rock shape sample also includes some other known steps, for instance spherical sample pretreatment etc., embodiment of the disclosure in order to unnecessarily fuzzy, these known structures are not shown in the diagram.
Especially, the flow chart in accompanying drawing and block diagram, it is illustrated that according to the method for the various embodiment of the application and the function in the cards of product and operation. It should also be noted that at some as in the realization replaced, the function marked in square frame can also to be different from the order generation marked in accompanying drawing. Such as, two square frames succeedingly represented can essentially perform substantially in parallel, and they can also perform sometimes in the opposite order, and this determines according to involved function. It will also be noted that, the combination of the square frame in each square frame in block diagram and/or flow chart and block diagram and/or flow chart, can realize by the special hardware based system of the function or operation that perform regulation, or can realize with the combination of specialized hardware Yu computer instruction.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle. Skilled artisan would appreciate that, invention scope involved in the application, it is not limited to the technical scheme of the particular combination of above-mentioned technical characteristic, also should be encompassed in when conceiving without departing from foregoing invention, other technical scheme being carried out combination in any by above-mentioned technical characteristic or its equivalent feature and being formed simultaneously. Such as features described above and (but not limited to) disclosed herein have the technical characteristic of similar functions and replace mutually and the technical scheme that formed.
Claims (10)
1. the defining method of the fragmentation parameters of a rock, it is characterised in that described method includes:
To the spherical rock sample on-load pressure being provided with precrack;
Record the numerical value of the pressure of the angle value between direction and the precrack direction of the pressure loaded and loading;
The fragmentation parameters of described rock is determined based on the numerical value of described angle value and the pressure of described loading.
2. the defining method of the fragmentation parameters of rock according to claim 1, it is characterised in that the pressure of described loading include following at least one:
Uniaxial pressure, confined pressure, pore fluid pressure, wherein, described uniaxial pressure refers to the pressure loaded in a single direction.
3. the defining method of the fragmentation parameters of rock according to claim 1, it is characterised in that described fragmentation parameters include following at least one:
Opening mode fracture toughness, slide mode fracture toughness, tearing mode fracture toughness.
4. the defining method of the fragmentation parameters of rock according to claim 1, it is characterized in that, described spherical rock sample includes the precrack running through described spherical rock sample, and described precrack arranges with the diameter place straight line of described spherical rock sample for axis of symmetry and is positioned at this axis of symmetry institute planar.
5. the defining method of the fragmentation parameters of rock according to claim 4, it is characterised in that described spherical rock sample includes the circular hole running through described spherical rock sample, and described circular hole is with the axis of symmetry of described precrack for axis.
6. the defining method of the fragmentation parameters of rock according to claim 5, it is characterised in that described method also includes: arrange precrack on spherical rock sample, wherein, the depth value of described precrack is arranged based on the diameter of described spherical rock sample.
7. the defining method of the fragmentation parameters of rock according to claim 6, it is characterised in that described spherical rock sample includes two precracks, described depth value is the 1/20��1/10 of described diameter.
8. the defining method of the fragmentation parameters of the rock according to any one of claim 1��7, it is characterised in that the described numerical value based on described angle value and the pressure of described loading determines that the fragmentation parameters of described rock includes:
Obtain the critical data broken of described spherical rock sample, described in the critical data that breaks include the numerical value of pressure of the angle value between direction and the precrack direction of uniaxial pressure loaded when spherical rock sample breaks and loading;
The fragmentation parameters of described rock is determined based on the described critical data broken.
9. the defining method of the fragmentation parameters of rock according to claim 8, it is characterised in that described determine that the fragmentation parameters of described rock includes based on the described critical data broken:
The fragmentation parameters of rock described in the critical data that breaks based on described, the feature calculation of described spherical rock sample, described feature includes the depth value of the diameter of described spherical rock sample, described precrack.
10. the defining method of the fragmentation parameters of rock according to claim 9, it is characterised in that described break based on described critical data, described spherical rock sample feature calculation described in the fragmentation parameters of rock include:
Based on the critical data broken of at least one spherical rock sample, this spherical rock sample feature calculation described in the fragmentation parameters of rock.
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