CN105223274A - Utilize in hole the method for the detecting rock equivalent elastic modulus that drops hammer - Google Patents
Utilize in hole the method for the detecting rock equivalent elastic modulus that drops hammer Download PDFInfo
- Publication number
- CN105223274A CN105223274A CN201510631501.4A CN201510631501A CN105223274A CN 105223274 A CN105223274 A CN 105223274A CN 201510631501 A CN201510631501 A CN 201510631501A CN 105223274 A CN105223274 A CN 105223274A
- Authority
- CN
- China
- Prior art keywords
- hammer
- hole
- elastic modulus
- equivalent elastic
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of method utilizing in hole the detecting rock equivalent elastic modulus that drops hammer.The method comprises boring, and lay vibration test system, setting is dropped hammer, and start up system is sampled, and discharges generation pumping signal of dropping hammer, shutdown test system, and Induction Peried picks up, and longitudinal wave velocity calculates, and equivalent elastic modulus calculates.The present invention is by testing and calculate the equivalent elastic modulus of quick-fried district periphery rock mass, by this physical quantity, can accurate evaluation explosion on the impact of periphery Rock Damage level of breakage, and then for Blasting in open-pit exploitation optimal design and Harm of Blasting Vibration science protection foundation is provided.Compared with traditional method for testing and analyzing, the present invention has focus and generates the features such as simple, test period is short, test specification is wide, testing cost is low.
Description
Technical field
The invention belongs to the technical field of opencast mining, particularly relate to a kind of method utilizing in hole the detecting rock equivalent elastic modulus that drops hammer.
Background technology
Blasting excavation is the principal mode of opencast mining, and the intense impact effect that explosion produces causes lesion ruptures by the rock mass at rear, quick-fried district, and then the generation of the disaster such as induced landslide, Rolling Stone.The equivalent elastic modulus of rock mass is the efficiency index of its lesion ruptures degree of reflection.The method of existing detecting rock equivalent elastic modulus, as bore extracting core process, explosion impulse method etc., the general input ratio needed is higher, and the operating cycle is also longer.
Bore extracting core process obtains rock sample by boring, then rock sample is made into test specimen, by the elastic modulus of testing equipment test test specimen.Due to the complicacy of stratigraphic distribution, the core obtained by one borehole, is difficult to the bulk properties definitely judging certain area rock mass.In order to obtain the equivalent damage cracking properties of a region rock mass, need to obtain core from multiple boring and the elastic modulus testing each test specimen.Therefore the cost of the method is higher, test period is longer.
The explosion method of impulsing imbeds explosive in the borehole, and blast makes to produce stress wave in rock mass, monitors the vibration of rock mass simultaneously.By analyzing the vibration information of rock mass, obtain the equivalent elastic modulus of rock mass.The testing cost of the method is higher, and the acquisition difficulty of explosive, transportation are numerous and diverse, and field adaptability is not strong, and there is the problem of shotfiring safety and protection aspect.
Summary of the invention
The object of the present invention is to provide a kind of method utilizing in hole the detecting rock equivalent elastic modulus that drops hammer.
The object of the invention is to be realized by following technical proposals:
The method utilizing in hole the detecting rock equivalent elastic modulus that drops hammer of the present invention, is characterized in that: comprise the steps:
(1) formation of vertically drilling in rock mass to be measured is dropped hammer hole, and hole depth scope of dropping hammer is 5m ~ 20m, and the bore dia that drops hammer is not less than 90mm.
(2) around hole of dropping hammer radially, one group of vibrating speed sensors or vibration acceleration sensor is arranged in ground rectilinear direction, this group of vibrating speed sensors or vibration acceleration sensor are connected with data collecting instrument respectively by data line, form the vibration test system of complete set;
(3) place Rope ladder frame at drilling orifice, be fixed on Rope ladder frame by one end of rope, the other end is connected with dropping hammer, and will drop hammer and be held in place the upper end-face edge place that holes;
(4) open vibration test system, make it be in the state of sampling;
(5) put down and drop hammer, making to drop hammer freely falls at the bottom of hole along drill center, produces pumping signal;
(6) vibration test system is closed;
(7) utilize data analyzer, the vibration signal that each sensor in ground picks up is separated, extracts the signal dropped hammer at the bottom of punching hole, according to the Induction Peried of oscillogram pickup different sensors;
(8) calculate the longitudinal wave velocity of test zone rock mass, computing formula is,
For the average velocity of wave in test zone place, be that foot of hole is to
ithe distance of individual sensor is that foot of hole is to
ithe distance of+1 sensor is
ithe vibration signal Induction Peried that individual sensor picks up is
ithe Induction Peried that+1 sensor picks up,
nfor the sum of sensor;
(9) calculate the equivalent elastic modulus of test zone rock mass, computing formula is, represents rock mass equivalent elastic modulus, represents Poisson ratio, represent the density of rock mass.
Of the present invention dropping hammer arranges Rope ladder frame at drilling orifice, its Rope ladder frame is made up of with the apical ring that one group of pole upper end is connected therewith one group of pole, described apical ring is connected with an end of a rope, and the other end of this rope drops hammer be connected with one.
The quantity of one group of vibrating speed sensors of the present invention or vibration acceleration sensor is 4-8, and the spacing between every adjacent sensors is 5m ~ 15m.
Advantage of the present invention is:
The present invention utilizes boring to drop hammer generation focus, utilizes ground vibration sensor senses source signal, utilizes elastodynamic correlation formula to calculate the equivalent elastic modulus of rock mass.By the present invention obtain rock mass equivalent elastic modulus, can accurate evaluation explosion on the impact of periphery Rock Damage level of breakage, and then for Blasting in open-pit exploitation optimal design and Harm of Blasting Vibration science protection foundation is provided.Compared with traditional method of testing, the present invention have focus generate simple, test period is short, test specification is wide, the features such as testing cost is low.
Accompanying drawing explanation
Fig. 1 is that boring of the present invention and testing sensor and acquisition instrument arrange schematic diagram.
Fig. 2 is that the boring of the embodiment of the present invention 1 and sensor and data collecting instrument arrange vertical view.
Fig. 3 is that the boring of the embodiment of the present invention 2 and testing sensor and data collecting instrument arrange vertical view.
Embodiment
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, the method utilizing in hole the detecting rock equivalent elastic modulus that drops hammer of the present invention, is characterized in that: comprise the steps:
(1) formation of vertically drilling in rock mass 4 to be measured is dropped hammer hole 1, and hole 1 depth range that drops hammer is 5m ~ 20m, and hole 1 diameter that drops hammer is not less than 90mm.
(2) around hole 1 of dropping hammer radially, one group of vibrating speed sensors or vibration acceleration sensor 7 is arranged in ground rectilinear direction, this group of vibrating speed sensors or vibration acceleration sensor 7 are connected with data collecting instrument phase 9 respectively by data line 8, form the vibration test system of complete set;
(3) place Rope ladder frame 5 in boring 1 aperture, be fixed on one end of rope 3 on Rope ladder frame 5, the other end 2 to be connected with dropping hammer, and will drop hammer and 2 be held in place the upper end-face edge place that holes;
(4) open vibration test system, make it be in the state of sampling;
(5) put down and drop hammer 2, making to drop hammer 2 freely falls at the bottom of hole along drill center, produces pumping signal;
(6) vibration test system is closed;
(7) utilize data analyzer, the vibration signal that each sensor in ground picks up is separated, extracts the signal dropped hammer at the bottom of punching hole, according to the Induction Peried of oscillogram pickup different sensors;
(8) calculate the longitudinal wave velocity of test zone rock mass, computing formula is,
For the average velocity of wave in test zone place, be that foot of hole is to
ithe distance of individual sensor is that foot of hole is to
ithe distance of+1 sensor is
ithe vibration signal Induction Peried that individual sensor picks up is
ithe Induction Peried that+1 sensor picks up,
nfor the sum of sensor;
(9) calculate the equivalent elastic modulus of test zone rock mass, computing formula is, represents rock mass equivalent elastic modulus, represents Poisson ratio, represent the density of rock mass.
As shown in Figure 1, 2, described Rope ladder frame is made up of with the apical ring 6 that one group of pole 5 upper end is connected therewith one group of pole 5, described apical ring 6 is connected with an end of a rope 3, the other end of this rope 3 drops hammer 2 to be connected with one, this drops hammer and 2 can be shot, also can be the symmetrical solid of revolution of right cylinder or other shapes.
The described weight range dropped hammer is at 4kg-40kg.
One group of described vibrating speed sensors or the quantity of vibration acceleration sensor are 4-8, and the spacing between every adjacent sensors is 5m-15m.Selecting of vibrating speed sensors or vibration acceleration sensor, generally speaking, the rock mass vibration acceleration sensor that longitudinal wave velocity is higher, lower rock mass vibrating speed sensors; Vibration acceleration sensor when two transducer spacings are less, vibrating speed sensors time larger.
embodiment one:
As shown in Figure 1, 2, the rock mass 4 in certain exploiting field of certain magnetic iron ore implements boring 1,1 degree of depth of holing is 16m, and aperture is 250mm; Four vibration acceleration sensors 7 are arranged along boring 1 radial alignment at ground surface, place a data collecting instrument 9, four vibration acceleration sensors 7 at a middle side part of four vibration acceleration sensors 7 to be connected with a data collecting instrument 9 respectively by data line 8; Spacing between vibration acceleration sensor 7 and boring 1 and between each vibration acceleration sensor is 6m; Drop hammer test is carried out as dropping hammer using 7.26kg shot, and adopt data collecting instrument 9 to record vibration processes that shot falls into boring; According to the Induction Peried of each vibration acceleration sensor and each vibration acceleration sensor to the distance H1 of foot of hole, H2, H3, H4.
Again according to described computing formula, can draw:
Between first vibration acceleration sensor apart from hole spacing 6m and second vibration acceleration sensor apart from hole spacing 12m, the longitudinal wave velocity in region is 3758m/s;
Between second vibration acceleration sensor apart from hole spacing 12m and the 3rd vibration acceleration sensor apart from hole spacing 18m, the longitudinal wave velocity in region is 3820m/s;
Between the 3rd vibration acceleration sensor apart from hole spacing 18m and the 4th vibration acceleration sensor apart from hole spacing 24m, the longitudinal wave velocity in region is 4131m/s;
The mean value that can calculate test zone longitudinal wave velocity is thus 3903m/s.
Can show that the elastic modulus of rock mass in this test zone is 36.2GPa by described formula.
embodiment two:
As shown in Figure 1,3, the present invention is implemented at certain open coal mine.The earth's surface in this exploiting field, colliery is the loose overburden of 1 ~ 2m, is coal and rock below overlayer.1 degree of depth of holing is 12m, aperture 310mm, six vibrating speed sensors 7 are linearly arranged along boring 1 radial direction at ground surface, place a data collecting instrument 9, six vibrating speed sensors 7 at a middle side part of six vibrating speed sensors 7 to be connected with a data collecting instrument 9 respectively by data line 8; Spacing between vibrating speed sensors 7 and boring 1 and between each vibrating speed sensors is 10m; Carry out drop hammer test using 30kg iron block as dropping hammer, data collecting instrument 9 have recorded to drop hammer and falls into the vibration processes of boring.By analyzing vibrational waveform and the computing method identical with embodiment one, obtain the longitudinal wave velocity of coal and rock;
Between first vibrating speed sensors apart from hole spacing 10m and second vibrating speed sensors apart from hole spacing 20m, the longitudinal wave velocity in region is 1876m/s;
Between second vibrating speed sensors apart from hole spacing 20m and the 3rd vibrating speed sensors apart from hole spacing 30m, the longitudinal wave velocity in region is 1966m/s;
Between the 3rd vibrating speed sensors apart from hole spacing 30m and the 4th vibrating speed sensors apart from hole spacing 40m, the longitudinal wave velocity in region is 1989m/s;
Between the 4th vibrating speed sensors apart from hole spacing 40m and the 5th vibrating speed sensors apart from hole spacing 50m, the longitudinal wave velocity in region is 2147m/s;
Between the 5th vibrating speed sensors apart from hole spacing 50m and the 6th vibrating speed sensors apart from hole spacing 60m, the longitudinal wave velocity in region is 2059m/s;
Thus, in test zone, the mean value of longitudinal wave velocity is 2007m/s;
According to described computing formula, show that the elastic modulus of coal and rock in this test zone is 7.49GPa.
Claims (3)
1. utilize in hole a method for the detecting rock equivalent elastic modulus that drops hammer, it is characterized in that: comprise the steps:
(1) formation of vertically drilling in rock mass to be measured is dropped hammer hole, and hole depth scope of dropping hammer is 5m ~ 20m, and the bore dia that drops hammer is not less than 90mm;
(2) around hole of dropping hammer radially, one group of vibrating speed sensors or vibration acceleration sensor is arranged in ground rectilinear direction, this group of vibrating speed sensors or vibration acceleration sensor are connected with data collecting instrument respectively by data line, form the vibration test system of complete set;
(3) place Rope ladder frame at drilling orifice, be fixed on Rope ladder frame by one end of rope, the other end is connected with dropping hammer, and will drop hammer and be held in place the upper end-face edge place that holes;
(4) open vibration test system, make it be in the state of sampling;
(5) put down and drop hammer, making to drop hammer freely falls at the bottom of hole along drill center, produces pumping signal;
(6) vibration test system is closed;
(7) utilize data analyzer, the vibration signal that each sensor in ground picks up is separated, extracts the signal dropped hammer at the bottom of punching hole, according to the Induction Peried of oscillogram pickup different sensors;
(8) calculate the longitudinal wave velocity of test zone rock mass, computing formula is,
For the average velocity of wave in test zone place, be that foot of hole is to
ithe distance of individual sensor is that foot of hole is to
ithe distance of+1 sensor is
ithe vibration signal Induction Peried that individual sensor picks up is
ithe Induction Peried that+1 sensor picks up,
nfor the sum of sensor;
(9) calculate the equivalent elastic modulus of test zone rock mass, computing formula is, represents rock mass equivalent elastic modulus, represents Poisson ratio, show the density of rock mass.
2. the method utilizing in hole the detecting rock equivalent elastic modulus that drops hammer according to claim 1, it is characterized in that: described dropping hammer arranges Rope ladder frame at drilling orifice, its Rope ladder frame is made up of with the apical ring that one group of pole upper end is connected therewith one group of pole, described apical ring is connected with an end of a rope, and the other end of this rope drops hammer be connected with one.
3. the method utilizing in hole the detecting rock equivalent elastic modulus that drops hammer according to claim 1, it is characterized in that: one group of described vibrating speed sensors or the quantity of vibration acceleration sensor are 4-8, and the spacing between every adjacent sensors is 5m-15m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510631501.4A CN105223274A (en) | 2015-09-29 | 2015-09-29 | Utilize in hole the method for the detecting rock equivalent elastic modulus that drops hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510631501.4A CN105223274A (en) | 2015-09-29 | 2015-09-29 | Utilize in hole the method for the detecting rock equivalent elastic modulus that drops hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105223274A true CN105223274A (en) | 2016-01-06 |
Family
ID=54992346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510631501.4A Pending CN105223274A (en) | 2015-09-29 | 2015-09-29 | Utilize in hole the method for the detecting rock equivalent elastic modulus that drops hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105223274A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758509A (en) * | 2016-04-25 | 2016-07-13 | 宏大矿业有限公司 | Field measurement method for sound velocity of surface mine rock mass |
| CN105928601A (en) * | 2016-04-25 | 2016-09-07 | 宏大矿业有限公司 | Method for measuring sound velocity of step rock mass under explosion area of open-pit mine |
| CN107831218A (en) * | 2017-11-29 | 2018-03-23 | 四川陆通检测科技有限公司 | A kind of excitation apparatus and its method of testing for compressional wave |
| CN109238883A (en) * | 2018-10-17 | 2019-01-18 | 西南石油大学 | The Microseismic monitoring system and micro seismic monitoring and analysis method of runtime concrete gravity dam body crack extension |
| CN114812312A (en) * | 2022-04-29 | 2022-07-29 | 东北大学 | Device and method for monitoring propagation rule of blasting vibration wave in rock mass |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928260A (en) * | 2005-09-08 | 2007-03-14 | 陈彦平 | Method for foundation pile end hole rock character detection and judgment technique |
| CN102141545A (en) * | 2010-11-27 | 2011-08-03 | 江西理工大学 | Method for testing rock mass mechanics parameters based on explosion seismic wave space-time attenuation law |
| CN103335903A (en) * | 2013-06-20 | 2013-10-02 | 山东理工大学 | Blasting disturbance impact load precise simulation device |
| CN104931363A (en) * | 2015-06-23 | 2015-09-23 | 江西理工大学 | Jointed rock deformation modulus testing method |
-
2015
- 2015-09-29 CN CN201510631501.4A patent/CN105223274A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928260A (en) * | 2005-09-08 | 2007-03-14 | 陈彦平 | Method for foundation pile end hole rock character detection and judgment technique |
| CN102141545A (en) * | 2010-11-27 | 2011-08-03 | 江西理工大学 | Method for testing rock mass mechanics parameters based on explosion seismic wave space-time attenuation law |
| CN103335903A (en) * | 2013-06-20 | 2013-10-02 | 山东理工大学 | Blasting disturbance impact load precise simulation device |
| CN104931363A (en) * | 2015-06-23 | 2015-09-23 | 江西理工大学 | Jointed rock deformation modulus testing method |
Non-Patent Citations (4)
| Title |
|---|
| 周爱民 等: "《难采矿床地下开采理论与技术》", 31 May 2015, 冶金工业出版社 * |
| 张杰: ""岩石压胀特性及压胀松动增产技术研究"", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 沈明荣、陈建峰: "《岩体力学》", 31 August 2015, 同济大学出版社 * |
| 牛滨华、孙春岩: "《固体弹性介质与地震波传播》", 31 December 2005, 地质出版社 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758509A (en) * | 2016-04-25 | 2016-07-13 | 宏大矿业有限公司 | Field measurement method for sound velocity of surface mine rock mass |
| CN105928601A (en) * | 2016-04-25 | 2016-09-07 | 宏大矿业有限公司 | Method for measuring sound velocity of step rock mass under explosion area of open-pit mine |
| CN105758509B (en) * | 2016-04-25 | 2019-05-10 | 宏大爆破有限公司 | A kind of on-site measurement method of the surface mine rock mass velocity of sound |
| CN105928601B (en) * | 2016-04-25 | 2019-07-30 | 宏大矿业有限公司 | A method of the step rock mass velocity of sound below the quick-fried area of measurement surface mine |
| CN107831218A (en) * | 2017-11-29 | 2018-03-23 | 四川陆通检测科技有限公司 | A kind of excitation apparatus and its method of testing for compressional wave |
| CN107831218B (en) * | 2017-11-29 | 2024-02-27 | 四川陆通检测科技有限公司 | Excitation device for longitudinal wave and test method thereof |
| CN109238883A (en) * | 2018-10-17 | 2019-01-18 | 西南石油大学 | The Microseismic monitoring system and micro seismic monitoring and analysis method of runtime concrete gravity dam body crack extension |
| CN114812312A (en) * | 2022-04-29 | 2022-07-29 | 东北大学 | Device and method for monitoring propagation rule of blasting vibration wave in rock mass |
| CN114812312B (en) * | 2022-04-29 | 2023-02-07 | 东北大学 | Device and method for monitoring propagation rule of blasting vibration wave in rock mass |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105223274A (en) | Utilize in hole the method for the detecting rock equivalent elastic modulus that drops hammer | |
| CN104390537B (en) | A kind of side slope pre split Blasting Excavation damage control method based on blasting vibration test | |
| CN102392685B (en) | Dense roadway group rock burst hazard prediction method | |
| CN107238538B (en) | Weak blasting induced strain type rock blasting site simulation test method | |
| CN102829899A (en) | Quick surrounding rock stress measuring method applicable to buried circular tunnels | |
| CN103323530A (en) | Method for detecting stability of roadway group surrounding rock by utilizing blasting operation vibration waves | |
| CN106597528B (en) | Tunnel geology 3-D seismics reflect seismoelectric integration forward probe device and method | |
| CN106199700A (en) | A kind of underground water seal oil storage cave depot micro seismic monitoring method and system | |
| Fu et al. | Comparison of excavation damage zones resulting from blasting with nonel detonators and blasting with electronic detonators | |
| CN104360395A (en) | Surface-underground full-space seismic wave data acquisition system and exploration method | |
| CN107356957A (en) | A kind of Microseismic monitoring system and installation and monitoring method based on optical fibre grating acceleration sensor | |
| CN107179555B (en) | Bit vibration source in seismic while drilling lateral wall geological structure detection method | |
| CN112213767A (en) | Method for evaluating advanced presplitting blasting effect of top plate | |
| CN104537195B (en) | A kind of deep rock mass Blasting Excavation induced vibration forecasting procedure based on energy principle | |
| CN106032750B (en) | Geological logging instrument based on drilling energy spectrum | |
| JP2016075606A (en) | Elastic wave velocity measuring method | |
| CN102520441B (en) | Method for acquiring earthquake exploration data through roadway oriented detection | |
| CN109239779A (en) | A kind of test method of tunnel surrounding relaxation zone and the stage division of rock convergence measure | |
| Lu et al. | Comparison of vibrations induced by excavation of deep-buried cavern and open pit with method of bench blasting | |
| CN105137487A (en) | Underground water flow field description method based on manual water discharging interference field | |
| CN113447982B (en) | Impact danger detection method for advanced area of single-head tunneling roadway | |
| CN106092311B (en) | A kind of blasting circuit quality evaluating method based on actual measurement high-frequency vibration blasting vibration signal | |
| JP5186538B2 (en) | Natural mountain exploration method | |
| CN203630367U (en) | Ground geological probe system | |
| CN105277451A (en) | Method for measuring and calculating damage factor of rocks surrounding explosion area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Applicant before: Anshan Iron & Steel Group Mining Co., Ltd. |
|
| COR | Change of bibliographic data | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160106 |
|
| WD01 | Invention patent application deemed withdrawn after publication |