Estimation of Modulus of the Caved Rock for Underground Coal Mines by Back Analysis using Numerical Modelling

Garg, Prasoon; Jaiswal, Akhilesh

doi:10.1007/s40033-015-0097-1

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…A great number of tasks to solve are focused on studying specifics of stress-strain state (SSS) of the massif (for instance, Prusek, 2010;Manoj, 2010;Yu, Kong, Niu, Zhu, & Jing, 2013;Coggan, Gao, Stead, & Elmo, 2012), the choice of technological parameters for mineral deposits' mining (Zhang, Zhang, Hou, Wu, & Zhou, 2014;Shi, Liu, & Wang, 2015) and improvement of constructive schemes of mine workings support, including resourcesaving ways of strengthening the marginal massif by anchor support (Manoj, 2010;Yu, Kong, Niu, Zhu, & Jing, 2013;Coggan, Gao, Stead, & Elmo, 2012;Garg & Jaiswal, 2015;Franklin, Fraley, & Burnham, 1974).…”

Section: Introductionmentioning

confidence: 99%

Numerical methods of geomechanics tasks solution during coal deposits’ development

Bondarenko¹,

Hardygóra²,

Symanovych³

et al. 2016

Min. miner. depos.

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Purpose. Generalization of numerical modeling of geomechanical processes in the vicinity of mine workings by finite elements method and making recommendations for substantiation of suitable construction and behavior of rock massif physical model. Methods.Software packages SolidWorks Simulation (COSMOS/М) and ANSYS are used for geomechanical tasks solution.Findings. Solutions of geomechanical tasks dealing with topical issues of estimating stress-strain state of rock massif around underground workings of different functions are given. Data on the rock massif stress-strain state are received and recommendations on adequate and authentic reflection of its structural peculiarities (stratification and fracturing) are made. Physical model of rock condition (elastic, elastic-plastic, rheological diagrams and complete diagram of deformation taking into account weakening and fracturing) is presented.Originality. New data about the mechanism of movement processes of coal-bearing massif around mine workings considering stratification and cracks content, limit and out-of-limit deflection state in separate areas, and also the impact of rheological rock properties are received.Practical implications. Complex of geomechanical tasks solutions allow to increase credibility of rock pressure manifestations prediction and substantiate technical solutions for effective and safe operations at coal mines.

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Section: Introductionmentioning

confidence: 99%

Numerical methods of geomechanics tasks solution during coal deposits’ development

Bondarenko¹,

Hardygóra²,

Symanovych³

et al. 2016

Min. miner. depos.

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show abstract

“…It has been observed by field observationand numerical simulation [1] that the induced stress on the pillar increases with the advancement of goaf. In the case of depillaring operationthree -dimensional simulation of the whole panel with rock bolting is very difficult, because it has take more computational time to solve.…”

Section: A Methodologymentioning

confidence: 97%

“…6 (b). It has been analyzed that the load on the model continuously increasing with the advancement of the goaf edge and it will reach maximum value 7.87 MPa shown in Table 1 (1) where, Su = ultimate induced stress I = capability index and H = average cover depth of coal seam. Cavability index has taken in this case = 2208 [1] Now, the steps involved to simulate the rock bolt in twodimension section of the panel has described below:In the first step, model has been simulated in development stage to evaluate the response of roof behavior and rock-bolt-grout interaction.…”

Section: A Methodologymentioning

confidence: 99%

Numerical simulation of roof bolt system during depillaring operations in bord and pillar panel

Hasim¹,

Jaiswal²,

Shrivastva³

et al. 2016

Proceedings of the Conference on Recent Advances in Rock Engineering (RARE 2016)

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Abstract-Roof bolting technology is widely used for support design in an underground coal mine. This paper focused on the numerical simulation considered the behaviour of roof and rock -grout -bolt interaction. Simulation of three dimensional model of depillaring panel with roof bolt support is difficult to simulate. Therefore, an analogy has been developed to replicate three dimensional depillaring panel into two dimension considered physico-mechanical properties of the immediate roof, geotechnical property of the mine and bolt and grout properties as an input parameters. A case of depillaring panel has been chosen for study. The simulation of rock bolt gives the result in terms of axial load developed on the bolt with depillaring panel advancement. Field observation of instrumented rock bolt has taken for validation of the numerical model. It has been observed that the maximum load developed on the model is very close to the field data.

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“…Axial load on the bolt and roof behavior has been analyzed and understand. It has been observed by field observation and numerical simulation that the induced stress on the pillar increases with the advancement of goaf [9]. In the case of depillaring operation, threedimensional simulation of the whole panel with rock bolting is complicated because it has taken more computational time to solve.…”

Section: Introductionmentioning

confidence: 99%

“…3. Cavability, index has taken in this case = 2208 [9] Now, the steps involved to simulate the rock bolt in three-dimension section of the panel has described below: [10] In the first step, the model has been simulated in the development stage to evaluate the response of roof behavior and rock -bolt -grout interaction.…”

Section: Introductionmentioning

confidence: 99%

Support Design during Depillaring Operation in Bord and Pillar Panel Using Numerical Simulation Method

Hasim¹,

Jaiswal²,

Shrivastva³

2017

MMC_C

Self Cite

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In an underground coal mine, most successful and economical approach to support the underground structure is roof bolting technology. The most preferred method of working in Indian coal mine is Bord and Pillar. It has been observed from the past histories that, the maximum number of accidents happens during depillaring operation. In this paper, the primary focus is to understand and analyze the roof behavior with roof bolting system in underground coal mine using numerical simulation approach. A three-dimensional (3D) model of the depillaring panel with support design using roof bolt technology is complicated to simulate. Therefore, the simulation is done near the goaf edge, where maximum chances of roof failure have been observed. On another word, it can say that simulation is done before the main fall. An elasto-plastic model has been taken for study considering physico-mechanical properties, geo-mining condition, roof bolt and grout properties as an input parameter. A case of a depillaring panel of underground coal mine has been chosen for study. The result is observed regarding axial load exerted on the bolt during mine operation. Instrumented rock bolt data has been taken for validation of the model from field observation. It has been observed in the model that maximum axial load developed on the bolt is very close to the field observation.

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Estimation of Modulus of the Caved Rock for Underground Coal Mines by Back Analysis using Numerical Modelling

Cited by 8 publications

References 5 publications

Numerical methods of geomechanics tasks solution during coal deposits’ development

Numerical methods of geomechanics tasks solution during coal deposits’ development

Numerical simulation of roof bolt system during depillaring operations in bord and pillar panel

Support Design during Depillaring Operation in Bord and Pillar Panel Using Numerical Simulation Method

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