Influence of containment of the bore hole pressures on explosive induced fracture

Dally, J. W.; Fourney, W.L.; Holloway, D.C.

doi:10.1016/0148-9062(75)90737-8

Cited by 50 publications

(20 citation statements)

References 2 publications

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“…All these characteristics and interfering factors lead to a certain level of complexity, where finding a compromise between accuracy, robustness, adaption, and applicability, governs which model is to be used while setting which monitoring method is the most appropriate to the application in hand. Several scientific and technical literatures for SOC monitoring [6][7][8], capacity estimation [9][10][11], battery impedance estimation [12][13][14] Battery management systems (BMS) are becoming the most vital factor in all battery based systems. All those systems' operations mainly depend on the lifetime and the capacity of the battery.…”

Section: Overviewmentioning

confidence: 99%

Battery Modeling and Lifetime Prediction

Salameh¹,

Ghossein²,

Hassan³

et al. 2017

MESE

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Battery Management Systems (BMS) are gaining greater interest by researchers due to the excessive increase of battery dependent electrical/electronic systems. Batteries are becoming more abundantly used worldwide, mainly in wireless mobile electrical devices, as well as Hybrid Electric Vehicles (HEVs) and Electric Vehicles (EVs). Moreover, batteries emerged as the only device capable of storing transformed energy, henceforth they formed the power banks of all renewable energy systems extending from solar panels, wind turbines, etc. This paper targets modeling various types of batteries, which implemented into the BMS can give an insight on their performance. Parameters of three common models for various types of batteries were identified. Moreover, a common method that gives an insight on the lifespan of any battery under examination was found. This technique was based on several measurements taken at the laboratory and relies on using the Bayesian classifier for finding the state of health of a tested battery. Fast methods are introduced starting from modeling batteries to knowing their lifespan.

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Section: Overviewmentioning

confidence: 99%

Battery Modeling and Lifetime Prediction

Salameh¹,

Ghossein²,

Hassan³

et al. 2017

MESE

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“…Under the detonation gas loading, the cracks near borehole extend under the gas-driven and the father cracks grow under the gas pressure and the blast stress waves. Blast stress wave is primary factor which formed crushed zone and fracture zone and detonation gas loading is primary factor which broken rock [8][9][10].…”

Section: The Invention Of Cushion Pad Of Blastingmentioning

confidence: 99%

Cushion Pad of Reducing Blasting Vibration — Starting New Era of Decreasing Disaster in Civil Engineering

Cheng¹,

Ruize²,

Meng³

et al. 2017

MESE

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The paper introduces a cushion pad which has simple structure and is easy used in blasting engineering. This device can not only avoid large amount of cracks on the rock slope and cumulative damage to surrounding rock mass upon blasting, but also cushion and reducing vibration of blasting. It is first used in Panzhihua Xujiagou iron open pit, Huayinshan coal mine with gas in SiChuan province, Miaowei hydropower station in Yunnan province and Minshui tunnel blasting engineering in Xin-Fen highway in Hebei-Shanxi province. It effectively cushion the heavy detonation shock from explosion avoiding the damage surface of surrounding rock and accumulated damage of rock, thus improve stability of rock mass and save a large amount of support costs. It is also used for decreasing disaster of engineering blast, e.g., collapse, roof fall or instability landslide. The vibration velocity with cushion is 50% less than with pre-splitting blasting, even less than the threshold of blasting vibration accumulated damage. Ratio of semi-hole archive is about 95%.

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“…This hypothesis is also supported by the results of full-scale partitioning experiments with blasthole liners reported by Brinkmann [9] and tests conducted by Olsson et al [10] with the use of emulsions. The importance of gas pressurisation in the propagation of fractures was demonstrated in laboratory scale conditions with synthetic materials by Kutter and Fairhurst [11], Dally et al [12], and McHugh [13]. There was however little evidence that gas pressurisation was the primary generator of fractures.…”

Section: Breakage and Damage Mechanisms In Rock Blastingmentioning

confidence: 99%

Modelling blast induced damage from a fully coupled explosive charge

Onederra

Furtney

Sellers

et al. 2013

International Journal of Rock Mechanics and Mining Sciences

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This paper presents one of the latest developments in the blasting engineering modelling fieldthe Hybrid Stress Blasting Model (HSBM). HSBM includes a rock breakage engine to model detonation, wave propagation, rock fragmentation, and muck pile formation. Results from two controlled blasting experiments were used to evaluate the code's ability to predict the extent of damage. Results indicate that the code is capable of adequately predicting both the extent and shape of the damage zone associated with the influence of point-of-initiation and free-face boundary conditions. Radial fractures extending towards a free face are apparent in the modelling output and matched those mapped after the experiment. In the stage 2 validation experiment, the maximum extent of visible damage was of the order of 1.45 m for the fully coupled 38-mm emulsion charge. Peak radial velocities were predicted within a relative difference of only 1.59% at the nearest history point at 0.3 m from the explosive charge. Discrepancies were larger further away from the charge, with relative differences of −22.4% and −42.9% at distances of 0.46 m and 0.61 m, respectively, meaning that the model overestimated particle velocities at these distances. This attenuation deficiency in the modelling produced an overestimation of the damage zone at the corner of the block due to excessive stress reflections. The extent of visible damage in the immediate vicinity of the blasthole adequately matched the measurements.

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Influence of containment of the bore hole pressures on explosive induced fracture

Cited by 50 publications

References 2 publications

Battery Modeling and Lifetime Prediction

Battery Modeling and Lifetime Prediction

Cushion Pad of Reducing Blasting Vibration — Starting New Era of Decreasing Disaster in Civil Engineering

Modelling blast induced damage from a fully coupled explosive charge

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