Simulation analysis on structure safety of coal mine mobile refuge chamber under explosion load

Zhao, Hongzhi; Qian, Xinming; Li, Jing

doi:10.1016/j.ssci.2011.08.053

Cited by 33 publications

(16 citation statements)

References 1 publication

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“…In this work, according to the requirements specification of numerical simulation, the gas explosion load can be simplified as the shock wave induced by a volume of 200 m 3 that 100 m away from the structure in a tunnel. However, explosion shock wave interacts with the structure is a typical transient process, in accordance with equivalent momentum, blast shock wave can be transformed into a triangular shock wave which is evenly applied to the surface of airtight blast door [35]. Here, the triangular shock wave loading curve is determined by three parameters: the peak overpressure, time of pressure increasing and actuation duration of overpressure.…”

Section: Models and Conditionsmentioning

confidence: 99%

Structural response and optimization of airtight blast door under gas explosion load

Li¹,

Chen²,

Wang³

et al. 2017

J. vibroeng.

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Airtight blast door, as one of the key components of a rescue device or a ventilating device in underground coal mine, which can not only guarantee the normal operation ventilation system, but also can prevent the propagation of shock wave and invasion of toxic gases. Therefore, high structural stability and safety is fundamental when designing a door. An airtight blast door was developed and optimized based on static analysis and topological optimization, and dynamic response analysis of the optimized airtight blast door subjected to gas explosion load was conducted using a novel approach proposed in this paper-the FEM-SPH contact algorithm. Results showed that the main component weight of this kind of door is 27.4 % smaller than the original one without reducing the blast and impact behavior, the maximum displacement and stress of the optimization door obtained by FEM-SPH contact algorithm (dynamic response) are much larger than those using static mechanical analysis. The FEM-SPH contact algorithm and typical optimization method as well as the example presented in this paper are helpful for the original design and optimization of other products. Some conducive suggestions were recommended based on the simulation results.Consequently, to develop an airtight blast door with excellent antiknock feature and stable sealing performance is of great necessity for rescue effectiveness.Nowadays, the design and development for airtight blast door has not yet attracted enough attention as for coal mine refuge shelters. Currently, many large equipment manufacturing companies, such as Mine ARC Systems, Shairzal Safety Engineering, Jack Kennedy Metal Products, Modern Mine Safety, Supply LLC, have been committed to design and safety evaluation of such a device [5]. In China, the government has made some relevant standards which demanded that all coal mines must be equipped with rescue equipment [6]. An airtight blast door must be stable and flexible so as to resist shock wave caused by gas explosion. Distortions and plastic deformations are not allowed in critical components, such as the observation windows, stiffeners and ribs. Of course, numerous studies have been performed on antiknock performance of blast door, on purpose of revealing its deformation mechanism and structural safety subjected to an explosion blast load [7]. The two commonly used approaches to examine the antiknock performance of the device are to conduct blast tests and numerical analysis, respectively. Fan [8] and Guo [9] carried out an experiment in a full-scale tunnel to test the anti-shock performance of recue capsule in a 40 m and 100 m tunnel with the explosion load of 200 m 3 of gas/air mixture, the pressure value at different positions in real tunnel and the limitation of gas overpressure on the surface of the blast door are obtained. Continuously, some similar experiments have been implemented on the antiknock performance under different types of explosive loads by few researchers [10][11][12][13][14][15]. However, on one hand, it is expensive and...

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Section: Models and Conditionsmentioning

confidence: 99%

Structural response and optimization of airtight blast door under gas explosion load

Li¹,

Chen²,

Wang³

et al. 2017

J. vibroeng.

View full text Add to dashboard Cite

show abstract

“…Numerical simulation provides an effective method for antiknock analysis of the rescue capsule. Some scholars have discussed the dynamic response of rescue capsule under different forms of explosive load, such as the equivalent triangular wave [14][15][16][17][18] and trapezoidal wave [19], even impulsive load [20]. Those simplified studies had saved too much computational cost while ignoring the fluidsolid coupling process between explosion shock wave and the structure.…”

Section: Introductionmentioning

confidence: 99%

A Novel Design of Rescue Capsule considering the Pressure Characteristics and Thermal Dynamic Response with Thermomechanical Coupling Action Subjected to Gas Explosion Load

Zhai

Wang

et al. 2017

Shock and Vibration

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To ensure the structural safety and reliability of coal mine rescue capsule in disastrous surroundings after gas explosion, in this paper, the thermomechanical coupling effect on a certain structure subjected to gas explosion was analyzed, and then a novel rescue capsule with a combination of radius and square features was designed according to the underground surroundings and relevant regulations on mine rescue devices. Foremost, the coupling mechanism of thermal-fluid-solid interaction between gas explosion shock wave and rescue capsule and the thermal dynamic response of the capsule subjected to explosion load of gas/air mixture was investigated and revealed by employing LS-DYNA. The variation laws and characteristics of stress field, displacement field, and temperature field of the capsule were analyzed based on the simulation results. Results show that the structural safety, tightness, and reliability of the capsule meet the requirements of the national safety regulations. The design method presented in this work provides a new thought for design of coal mine rescue capsule.

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“…Nowadays, rescue capsule and refuge chamber have become two frequent and important refuge shelters for coal mine emergency rescue during explosion and fire accidents. Meanwhile, numerous researchers [4][5][6][7][8][9][10] have conducted many experimental and numerical studies on the antiknock performance of the capsule or chamber. A variety of high-strength, antiknock and high temperature resistant rescue equipment had been designed and developed for safety production of coal mine.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation on structural safety and dynamic response of coal mine rescue ball with gas explosion load using Arbitrary Lagrangian-Eulerian (ALE) algorithm

Chen¹,

Li²,

Wang³

et al. 2017

J. vibroeng.

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Coal mine rescue devices, which can supply miners underground with fundamental shelters after gas explosion, are essential for safety production of coal mines. In this paper, a novel and composite structure-rescue antiknock ball for coal mine rescue is designed. Further, the structural safety and dynamic response under gas explosion of the antiknock ball is investigated by ALE algorithm. To achieve this goal, the ALE finite element method is described in dynamic form, and governing equations and the finite element expressions of the ALE algorithm are derived. 3 balls with different structures are designed and dynamic response analysis has been conducted in a semi-closed tunnel with explosive load of pre-mixed gas/air mixture by using ALE algorithm based on explicit nonlinear dynamic program LS-DYNA. Displacement field, stress field and energy transmission laws are analyzed and compared via theoretical calculations. Results show that the cabin door, emergency door and spherical shell are important components of the rescue ball. The 3# composite ball is the optimization structure that can delay the shock effect of the gas explosion load on a coal mine rescue system; the simulation results can provide reference data for coal mine rescue system design.

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Simulation analysis on structure safety of coal mine mobile refuge chamber under explosion load

Cited by 33 publications

References 1 publication

Structural response and optimization of airtight blast door under gas explosion load

Structural response and optimization of airtight blast door under gas explosion load

A Novel Design of Rescue Capsule considering the Pressure Characteristics and Thermal Dynamic Response with Thermomechanical Coupling Action Subjected to Gas Explosion Load

Numerical simulation on structural safety and dynamic response of coal mine rescue ball with gas explosion load using Arbitrary Lagrangian-Eulerian (ALE) algorithm

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