Novel Jet Cutter Cartridge for Eliminating Deepwater Stuck Pipe Hazards

Cheng, Yi; Tao, C.; Liu, R.; Yao, Yu‐Le; Hu, Fang-Fang; Ma, Honghao; Shen, Zh.

doi:10.1134/s0010508221010147

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Notably, the dynamic behaviors of solid media can be described by constitutive models, while descriptions of fluid media require the use of both constitutive models and state equations. Therefore, the constitutive model of *MAT_HIGH_EXPLOSIVE_BURN was used for the explosive, and the complex relationship among the pressure, energy, and volume was represented by the JWL state equation [46][47][48] . Similarly, the *MAT_NULL constitutive model and linear polynomial state equation were simultaneously applied to air 49 .…”

Section: Constitutive Models and Materials Parametersmentioning

confidence: 99%

Research on the mechanism and application of wedge cutting blasting with hole-inner delay

Cheng,

Wang,

Wang

et al. 2024

Sci Rep

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To increase the efficiency of deep-hole blasting driving in mine rock tunnels, an innovative pattern of wedge cutting blasting with hole-inner delay was proposed. First, the blasting mechanisms of conventional and innovative wedge cutting patterns were theoretically investigated. The results showed that the resistance from large upper rock blocks and the clamping action from the surrounding rock were the major challenges of conventional cutting methods. For the innovative cutting pattern, under the conversion of the spatial distribution and release sequence of blasting energy, the first blasting of the upper charge can strengthen the breaking of the upper rock mass and create a new free surface, which provides favorable conditions for the delayed blasting of the bottom charge. Second, finite element models of two cutting patterns were established and solved, and the simulation results visually revealed the propagation of a stress wave. Critically, the stress strength in the upper cavity increased by 66–83% under the action of the upper charge, which was conducive to the breaking of the upper rock mass and the generation of a new free surface. Therefore, the rock mass in the bottom cavity can be readily broken and discharged. Ultimately, field applications were executed in a rock tunnel. Compared with a conventional cutting pattern, the proposed innovative cutting pattern can prominently increase the cycle advance and hole utilization and greatly reduce the unit consumption of explosives and detonators. This research confirms the usability of the innovative wedge cutting pattern with hole-inner delay in deep-hole blasting driving of rock tunnels.

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Section: Constitutive Models and Materials Parametersmentioning

confidence: 99%

Research on the mechanism and application of wedge cutting blasting with hole-inner delay

Cheng,

Wang,

Wang

et al. 2024

Sci Rep

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show abstract

“…The rock mass and stemming were usually identified as solid media and described by the Lagrange element algorithm. Then, the fluid-structure coupling function was defined to realize the mechanical interaction between the fluid medium and solid medium (Hu et al 2014;Cheng et al 2021a). Furthermore, to eliminate the boundary reflection to simulate the infinite field through the finite field, artificial nonreflecting boundary conditions were imposed on the model surfaces other than the working face (Cheng et al 2021b;Zhang et al 2021;Jayasinghe et al 2017).…”

Section: Numerical Modelmentioning

confidence: 99%

Study on the novel technique of straight hole cutting blasting with a bottom charged central hole exploded supplementally

Cheng

Wang

et al. 2021

Arab J Geosci

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To improve the cutting efficiency in the deep hole blasting of rock roadways, a straight hole cutting blasting technique with supplemental blasting of the central hole was developed. First, the blasting mechanisms of the traditional and novel cutting methods were analysed theoretically. For the novel cutting method, the upper uncharged part of the central hole still acted as empty hole. Cutting hole blasting could eject most of the rock mass in the cutting cavity and hence produce a new free face to weaken the clamping effect of central hole blasting. Then, the residual rock mass could be fully removed after central hole blasting. Second, simulation of the new cutting mode was conducted, which visualized the stress wave forming process. Simulation results showed that the rock mass at the bottom of the cutting cavity could be predamaged by the stress wave caused by cutting hole blasting, and the high-intensity stress field generated by central hole blasting would lead to further damage to the residual rock mass. Thus, the residual rock mass could be thrown out readily. Finally, the auxiliary roadway of an iron mine was selected for the blasting experiments. After statistical analysis, due to the supplemental blasting of the central hole, the average blasting footage was increased by 0.35 m, and the average specific charge was reduced by 0.43 kg•m −3 , which validated the predominance of the novel cutting method in the deep hole blasting of rock roadways.

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Numerical simulation study of sympathetic detonation in stages

Yang

Wang

2022

Defence Technology

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Novel Jet Cutter Cartridge for Eliminating Deepwater Stuck Pipe Hazards

Cited by 5 publications

References 12 publications

Research on the mechanism and application of wedge cutting blasting with hole-inner delay

Research on the mechanism and application of wedge cutting blasting with hole-inner delay

Study on the novel technique of straight hole cutting blasting with a bottom charged central hole exploded supplementally

Numerical simulation study of sympathetic detonation in stages

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