Strata Stability Investigation and Convergence Monitoring (SSICM) in Thick-Seam Depillaring with Caving by Cable Bolting Method

Mangal, Aveek

doi:10.1007/s42461-020-00371-x

Cited by 7 publications

(4 citation statements)

References 24 publications

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“…The split and fender method, which has been very popular in India, is used in Sarpi mines, where the extraction involves splitting the pillar in strike direction, and subsequently, fenders are extracted. Further, fenders are also extracted by taking slices, leaving adequate ribs to provide temporary support [7]. Slices are driven at an angle of about 120 ° to enable safe movement of the machine and to operate the machine from a distance allowing maximum visibility.…”

Section: Depillaringmentioning

confidence: 99%

“…These are easy to install wire extensometers designed to fit into 35-45mm diameter boreholes with a stainless-steel wire attached to each borehole horizon using a simple spring anchor. It has been designed and engineered for coal mining applications [7]. The principle employed is that the inductance of a coil will vary depending on the position of a ferrite rod moving within it.…”

Section: Fig 14 Stress Meter Used At Sarpi Mine Ecl 42 Remote Reading...mentioning

confidence: 99%

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Deployment of Continuous Miner in under Ground Coal Mine: A Case Study of Sarpi Mine

Samanta

Sinha

Chakrabarty

et al. 2022

J. Inst. Eng. India Ser. D

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The continuous miner technology (CMT) is being adopted extensively in underground coal mines of India as Mass Production Technology (MPT). This technology potentially eliminates the two-unit operating, namely the drilling and blasting. This elimination helps for better strata control and avoids the drillers working in unsafe conditions, maybe under the loose coal roof. This CMT improves the quality of the coal extracted and increases the output per man shift (OMS) by reducing the deployment of face crew. It also reduces the accident as it is operated by remote and workforce exposure to faces is limited. The method also helps for better roof and side control, thus preventing side and roof fall danger. With the changing time now, continuous miners of different heights are available, which helps for optimum use of technology to mine out varying insitu height of coal seam. This paper discusses the performance of the CMT in the Sarpi mine and compares the technology available globally.

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Section: Depillaringmentioning

confidence: 99%

Section: Fig 14 Stress Meter Used At Sarpi Mine Ecl 42 Remote Reading...mentioning

confidence: 99%

Deployment of Continuous Miner in under Ground Coal Mine: A Case Study of Sarpi Mine

Samanta

Sinha

Chakrabarty

et al. 2022

J. Inst. Eng. India Ser. D

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“…After excavation, the stress state of the surrounding rock changes dramatically and stress is redistributed [1][2][3], which can lead to the instability of a roadway. Common failure modes for the surrounding rock include brittle failure, roof collapse, sidewall collapse [4][5][6], etc. The deep roadway is subjected to high stress, requiring excavation to confront complex stress conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Failure Mechanisms of Deep Roadway Sidewalls with Different Height-Width Ratios and Lateral Pressures

Wu,

Zhang,

Xing

et al. 2024

Applied Sciences

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The stability of roadway sidewalls is crucial to ensuring people’s safety and production efficiency in coal mining. This paper investigated the deformation and failure of deep roadway sidewalls, particularly the effects of height-width ratios and lateral pressure coefficients. Our research results indicate that brittle failure occurred in the diabase sidewall rock of the Datai coal mine, and a V-shaped pit was formed as a result of shear damage caused by high stress. When the height-width ratio of a roadway increases from 0.25 to 2.00, the tensile and shear plastic failure area of the sidewall increases, and vertical stress is transferred to a deep part of the roadway sidewall. There are two stress concentration zones and two stress peak points in the sidewall of a roadway. When the lateral pressure coefficient increases from 0.10 to 1.00, the tensile plastic zone of rock mass in the sidewall first decreases and gradually reaches stability. On the other hand, the shear failure area increases and then decreases. Similarly, the sidewall horizontal displacement decreases and then increases. Additionally, the vertical stress concentration position is located near the roadway sidewall.

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“…The most common cable fault is the open circuit of cable lines [1][2]. Cable open circuit fault is generally divided into two forms: the first is the damage of internal conductor, and the external insulation protection layer has not changed significantly; The second is that the cable line is directly disconnected due to external force [3][4]. Continuous pulling during cable installation may cause internal damage to the cable, and the harsh environment under which the cable works for a long time may also cause damage to the cable.…”

Section: Introductionmentioning

confidence: 99%

Research on an efficient method of cable breakpoint location

Zheng

Sun

Liao

et al. 2023

Second International Conference on Electronic Information Engineering and Computer Communication (EIECC 2022)

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With the rapid development of communication technology and electric power industry, cables have been widely used. The demand for cables in various industries has risen sharply, so a variety of cables have appeared in the market. After a large number of cables are used, cable break failures occur frequently. In addition, most cables are installed in the special environment of high altitude or underground. Without professional testing equipment, line maintenance personnel can hardly find the fault location. Based on this, an efficient cable breakpoint location method is proposed, and the modulus maximum detection algorithm based on wavelet transform is studied to realize the cable breakpoint location. The wavelet threshold de-noising technology is used to remove the noise in the transmission signal and reflection signal collected by the system. By comparing the results of different wavelet decomposition, the optimal wavelet basis function is selected, and the modulus maximum sequence of the wavelet coefficients obtained after wavelet decomposition is calculated, then the time difference between the transmission pulse and the reflection pulse can be detected, and the location of the cable breakpoint can be further determined. The existing cables in the laboratory are tested for many times, and the actual test results are analyzed, which can meet the technical requirements of cable breakpoint detection.

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Strata Stability Investigation and Convergence Monitoring (SSICM) in Thick-Seam Depillaring with Caving by Cable Bolting Method

Cited by 7 publications

References 24 publications

Deployment of Continuous Miner in under Ground Coal Mine: A Case Study of Sarpi Mine

Deployment of Continuous Miner in under Ground Coal Mine: A Case Study of Sarpi Mine

Numerical Study on Failure Mechanisms of Deep Roadway Sidewalls with Different Height-Width Ratios and Lateral Pressures

Research on an efficient method of cable breakpoint location

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