PL449290A1 - Method for determining the maximum vertical vibration frequency in a deposit caused by a paraseismic longitudinal wave in the near field during the mining of a rock block by blasting - Google Patents
Method for determining the maximum vertical vibration frequency in a deposit caused by a paraseismic longitudinal wave in the near field during the mining of a rock block by blastingInfo
- Publication number
- PL449290A1 PL449290A1 PL449290A PL44929024A PL449290A1 PL 449290 A1 PL449290 A1 PL 449290A1 PL 449290 A PL449290 A PL 449290A PL 44929024 A PL44929024 A PL 44929024A PL 449290 A1 PL449290 A1 PL 449290A1
- Authority
- PL
- Poland
- Prior art keywords
- longitudinal wave
- vibration frequency
- blasting
- vertical vibration
- rock
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C39/00—Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/045—Arrangements for electric ignition
- F42D1/05—Electric circuits for blasting
- F42D1/055—Electric circuits for blasting specially adapted for firing multiple charges with a time delay
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Acoustics & Sound (AREA)
- Mining & Mineral Resources (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- General Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Sposób określania maksymalnej pionowej częstotliwości drgań w złożu, spowodowanej parasejsmiczną falą podłużną w polu bliskim, podczas urabiania bloku skalnego strzelaniem przy pomocy materiałów wybuchowych, znajdujący zastosowanie w górnictwie odkrywkowym do określenia czasu odpalenia następnego otworu, czyli czasu zwłoki milisekundowej powodującej wygaszenie drgań spowodowanych odpaleniem poprzedniego otworu, charakteryzuje się tym, że na minimum trzech, o zorientowanych kierunkach, próbkach skalnych o minimalnych wymiarach 10 x 12 x 15 cm pobranych z odstrzeliwanego bloku skalnego w odległości między nimi równej 1/3 długości bloku, przyrządem ultradźwiękowym z głowicami do fali podłużnej wykonuje się pomiary czasu tp przejścia fali podłużnej na kierunku pionowym i dzieląc długość trzech próbek skalnych na kierunku pionowym przez łączny czas przejścia przez nie fali podłużnej określa się średnią prędkość fali podłużnej na kierunku pionowym V; następnie w czasie urabiania strzelaniem badanego bloku, przed jego czołem w punkcie pomiarowym odległym w zakresie od 221 m do 252 m od źródła drgań, po odpaleniu ładunku materiału wybuchowego dokonuje się pomiaru pionowej częstotliwości drgań fr, przy czym w powyższym linia łącząca punkt pomiarowy ze środkowym otworem strzałowym pierwszego szeregu jest prostopadła do długości bloku urabianej skały, kolejno mając pomierzone wartości pionowej częstotliwości drgań fr i średnią prędkości fali podłużnej na kierunku pionowym V dla próbek skalnych wylicza się maksymalną pionową częstotliwość drgań fv max w złożu urabianym strzelaniem, którą stanowi stosunek pionowej częstotliwości drgań fr zmierzonej w odległości w zakresie od 221 m do 252 m od źródła drgań do funkcji sinus z iloczynu rzeczonej pionowej częstotliwości drgań fr, kąta 360° i czasu przejścia fali podłużnej tm, [fv max = fr/sin (fr*360*tm)], przy czym czas przejścia fali podłużnej tm wyrażony jest jako stosunek odległości punktu pomiarowego od źródła drgań do średniej pomierzonej na próbkach skalnych prędkości fali podłużnej na kierunku pionowym V.A method for determining the maximum vertical vibration frequency in a deposit caused by a paraseismic longitudinal wave in the near field during the mining of a rock block by blasting with explosives, applicable in open-pit mining to determine the time of firing the next hole, i.e. the millisecond delay time causing the extinction of vibrations caused by the firing of the previous hole, is characterized in that on at least three rock samples with minimum dimensions of 10 x 12 x 15 cm, oriented in different directions, taken from the blasted rock block at a distance between them equal to 1/3 of the block length, using an ultrasonic device with longitudinal wave heads, measurements of the time tp of the longitudinal wave passage in the vertical direction are made and by dividing the length of the three rock samples in the vertical direction by the total time of the longitudinal wave passage through them, the average velocity of the longitudinal wave in the vertical direction V is determined; then, during the blasting of the tested block, in front of its face at a measuring point located in the range of 221 m to 252 m from the vibration source, after firing the explosive charge, the vertical vibration frequency fr is measured, wherein in the above-mentioned case the line connecting the measuring point with the central blast hole of the first row is perpendicular to the length of the block of the mined rock, having successively measured values of the vertical vibration frequency fr and the average velocity of the longitudinal wave in the vertical direction V for the rock samples, the maximum vertical vibration frequency fv max is calculated in the deposit mined by blasting, which is the ratio of the vertical vibration frequency fr measured at a distance of 221 m to 252 m from the vibration source to the sine function from the product of the said vertical vibration frequency fr, the angle of 360° and the longitudinal wave transit time tm, [fv max = fr/sin (fr*360*tm)], wherein the longitudinal wave transit time tm is expressed as the ratio of the distance of the measuring point from the vibration source to the average longitudinal wave velocity measured on rock samples in the vertical direction V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL449290A PL449290A1 (en) | 2024-07-23 | 2024-07-23 | Method for determining the maximum vertical vibration frequency in a deposit caused by a paraseismic longitudinal wave in the near field during the mining of a rock block by blasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL449290A PL449290A1 (en) | 2024-07-23 | 2024-07-23 | Method for determining the maximum vertical vibration frequency in a deposit caused by a paraseismic longitudinal wave in the near field during the mining of a rock block by blasting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL449290A1 true PL449290A1 (en) | 2026-01-26 |
Family
ID=98521460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL449290A PL449290A1 (en) | 2024-07-23 | 2024-07-23 | Method for determining the maximum vertical vibration frequency in a deposit caused by a paraseismic longitudinal wave in the near field during the mining of a rock block by blasting |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL449290A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL231684B1 (en) * | 2017-01-11 | 2019-03-29 | Poltegor Inst Inst Gornictwa Odkrywkowego | Method for determination of the horizontal tangent value of the ground vibrations speed vector for different distances from the vibration source |
| CN111426243B (en) * | 2020-01-20 | 2020-12-29 | 重庆中环建设有限公司 | Determination method of blasting parameters based on differential vibration synthesis of different blastholes near blast source |
| CN110487136B (en) * | 2019-08-23 | 2021-12-03 | 贵州大学 | Step blasting millisecond delay suppression and vibration reduction method based on frequency spectrum superposition |
| PL242357B1 (en) * | 2020-08-17 | 2023-02-13 | Poltegor Inst Inst Gornictwa Odkrywkowego | Method for determining the maximum horizontal radial frequency of vibrations in the deposit, caused by a parasitic paraseismic horizontal radial wave in the near field during mining of a block of rock by blasting |
| PL244881B1 (en) * | 2022-05-26 | 2024-03-18 | Poltegor Inst Inst Gornictwa Odkrywkowego | Method of determining the inter-blast delay when mining a deposit using charges of explosives |
-
2024
- 2024-07-23 PL PL449290A patent/PL449290A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL231684B1 (en) * | 2017-01-11 | 2019-03-29 | Poltegor Inst Inst Gornictwa Odkrywkowego | Method for determination of the horizontal tangent value of the ground vibrations speed vector for different distances from the vibration source |
| CN110487136B (en) * | 2019-08-23 | 2021-12-03 | 贵州大学 | Step blasting millisecond delay suppression and vibration reduction method based on frequency spectrum superposition |
| CN111426243B (en) * | 2020-01-20 | 2020-12-29 | 重庆中环建设有限公司 | Determination method of blasting parameters based on differential vibration synthesis of different blastholes near blast source |
| PL242357B1 (en) * | 2020-08-17 | 2023-02-13 | Poltegor Inst Inst Gornictwa Odkrywkowego | Method for determining the maximum horizontal radial frequency of vibrations in the deposit, caused by a parasitic paraseismic horizontal radial wave in the near field during mining of a block of rock by blasting |
| PL244881B1 (en) * | 2022-05-26 | 2024-03-18 | Poltegor Inst Inst Gornictwa Odkrywkowego | Method of determining the inter-blast delay when mining a deposit using charges of explosives |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105022031B (en) | A kind of layered velocity localization method of region rock mass microseism focus | |
| Bogdanoff | Vibration measurements in the damage zone in tunnel blasting | |
| CN110411871A (en) | Experimental system and method for studying the mechanism of blast stress wave action in surrounding rock | |
| US11920472B2 (en) | Reasonable millisecond time control method for excavation blasting of tunnel | |
| CN110671980B (en) | Method for determining delay time of blast holes in adjacent rows of differential blasting | |
| PL449290A1 (en) | Method for determining the maximum vertical vibration frequency in a deposit caused by a paraseismic longitudinal wave in the near field during the mining of a rock block by blasting | |
| PL441279A1 (en) | Method of determining the inter-shot delay when mining a deposit using explosive charges | |
| CN111413734B (en) | Calculation method for testing propagation speed and arrival time of underground vibration wave | |
| PL434974A1 (en) | Method for determining the maximum horizontal radial frequency of vibrations in the deposit, caused by a parasitic paraseismic horizontal radial wave in the near field during mining of a block of rock by blasting | |
| CN113340410A (en) | Ground vibration prediction method based on spherical charging condition | |
| CN106772595A (en) | A kind of method that detonator time delay is eliminated in shock wave Velocity Inversion for colliery | |
| Zhang | Reducing eyebrow break caused by rock blasting in Malmberget mine | |
| RU2831189C1 (en) | Method of testing axisymmetric high-explosive fragmentation incendiary ammunition | |
| RU2803984C1 (en) | Method for testing axisymmetric high-explosive fragmentation munitions with non-axisymmetric fragmentation field | |
| Fu et al. | Experimental study on the stability of surrounding rock in tunnel blasting construction | |
| US2761309A (en) | Method for determining high intensity transient stresses in impulsively loaded bodies | |
| PL442213A1 (en) | Method of determining the diameter of a blast hole before the first blasting in a new deposit mined using charges of explosives | |
| CN112433245B (en) | Coal mine fault structure prediction and forecast method | |
| RU2814324C1 (en) | Method of testing ammunition for air impact and device for its implementation | |
| Richards | Blast vibration wavefront reinforcement model | |
| Aldaş et al. | Timing simulation for the selection of optimum delay time | |
| Niklasson et al. | Does Charge Confinement Affect The Vibration Level in Blasting? Phase 1-Feasibility Study | |
| Yang et al. | A Case Study on Trim Blast Fragmentation Optimization Using MBF and MSW Models at an Open Pit Mine in Canada | |
| PL443680A1 (en) | Method of determining the dynamic value of the compressive strength of a rock mass mined with an explosive | |
| PL444980A1 (en) | Method for determining the frequency of a paraseismic wave in the radial direction for determining the type of directional distribution of the horizontal radial velocity of ground vibrations during rock mining by firing explosive charges |