A Study of Stability Investigation of Immediate Roof for Extraction of Thick Coal Seam in India

Mangal, Aveek

doi:10.1007/s40033-021-00264-3

Cited by 5 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where: E 1 is the immediate roof elastic modulus; E 2 is the backfill body elastic modulus (Liu et al, 2017b); y 1 is the immediate roof compression; y 2 is the backfill body compression; h 1 is the immediate roof height (Mangal, 2021); and h 2 is the backfill body height.…”

Section: Foundation Coefficientmentioning

confidence: 99%

Overburden and surface subsidence with slicing paste filling mining in thick coal seams

Zheng

Wang²,

Pang³

2023

Front. Earth Sci.

View full text Add to dashboard Cite

To overcome the difficulties of overburden failure and surface subsidence induced by the slicing mining of extra-thick coal seams, slicing filler paste is typically utilized. In this paper, a continuous curved beam mechanical model of paste filling mining was established by theoretical analysis against the background of the 3305 working face of Yangcheng Coal Mine, the main controlling factors of surface subsidence were analyzed using an orthogonal experiment method (OEM) and an analytic network process (ANP) coupled comprehensive assignment, and the vertical displacement distribution of the overlying rock under different filling intensity was simulated using numerical simulation software. The following main findings were obtained. First, the elastic modulus of the backfill is the primary regulating factor, as demonstrated by the results. Second, the greater the filling body’s elastic modulus, the more efficiently it carries the overburden load and minimizes the maximum surface subsidence. Third, the distance from the open-cut mine likewise reflects the degree of surface subsidence, with the amount of subsidence increasing as the distance from the mine increases.

show abstract

Section: Foundation Coefficientmentioning

confidence: 99%

Overburden and surface subsidence with slicing paste filling mining in thick coal seams

Zheng

Wang²,

Pang³

2023

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…In order to verify the response ability of anchor bolt to continuous alternating load [14], its dynamic response test scheme is designed, as shown in Fig. 14.…”

Section: Dynamic Response Testmentioning

confidence: 99%

“…When the ultimate tensile load of the segmented constant resistance anchor bolt exceeds the preset value of the constant resistance device, the bolt body will not have excessive deformation or fracture failure [14]. Under the action of multistage prestress, the energy is released more slowly, so as to more effectively buffer the deformation of surrounding rock [15], and greatly reduce the possibility of major accidents such as roof fall and collapse.…”

Section: Analysis Of Optimized Support Effectmentioning

confidence: 99%

Research on dynamic stability of large deformation roadway with application of segmented resistance anchor bolt

Liu¹,

Zhang²

2022

J. vibroeng.

View full text Add to dashboard Cite

The dynamic stability of large deformation roadway can be significantly affected by seismic vibration. In order to improve the support effect, a segmented constant resistance anchor bolt structure is proposed. The preload can be set in segments to effectively reduce the tension deviation. The support stability of this type of bolt is verified by field test and experimental simulation. Based on the bearing and deformation characteristics of surrounding rock, the supporting and installation, grouting process and anchor cable stress monitoring of this type anchor bolt are designed. Through the field measurement of the roadway, the variation laws of the rock swelling coefficient, anchor cable tension and roof subsidence under the condition of bolt support are obtained. A tunnel dynamic deformation test-bed is built to study the dynamic vibration response of the designed anchor bolt to alternating load. Applying orthogonal exciting force, the tension changes in different constant resistance sections are obtained. The results show that this type of bolt has remarkable effect of resisting alternating load, and the maximum tension deviation within ±200 m working face is less than 8 %, which has better support stability than conventional bolt.

show abstract

Bridging Efficiency and Safety: A Case Study of Extraction of Thick Coal Seam Having Low Incubation Period Using Continuous Miner

Mandal,

Bhattacharjee,

Ghosh

et al. 2023

Springer Proceedings in Earth and Environmental Sciences

View full text Add to dashboard Cite

A Study of Stability Investigation of Immediate Roof for Extraction of Thick Coal Seam in India

Cited by 5 publications

References 17 publications

Overburden and surface subsidence with slicing paste filling mining in thick coal seams

Overburden and surface subsidence with slicing paste filling mining in thick coal seams

Research on dynamic stability of large deformation roadway with application of segmented resistance anchor bolt

Bridging Efficiency and Safety: A Case Study of Extraction of Thick Coal Seam Having Low Incubation Period Using Continuous Miner

Contact Info

Product

Resources

About