An analysis of coal bump liability in a bump prone mine

A. Wahab Khair

doi:10.1007/bf00880837

Study on Characteristics of Energy for Hard Roof Fracture in Island Workface

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.734-737.694 ◽

2013 ◽

Vol 734-737 ◽

pp. 694-697

Author(s):

Xu Feng Pang ◽

Ke Xue Zhang

Keyword(s):

Strain Energy ◽

Typical Case ◽

Energy Characteristics ◽

Hard Roof ◽

Coal Bump ◽

Bending Strain ◽

Before And After ◽

Mechanical Models

According to the characteristics of the island workface with hard roof, various mechanical models of hard roof in island workface are established, to analyze energy characteristics of hard roof before and after the first fracture in island workface with all round gobs, derived their simplified formulas of bending strain energy for hard roof before and after the first fracture, and using these formulas to estimate the bending strain energy for the typical case of coal bump, reveals the energy cause of coal bump and verify the validity of these formulas.

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Evaluating the coal bump potential for gateroad design in multiple-seam longwall mining: A case study

Journal of the Southern African Institute of Mining and Metallurgy ◽

10.17159/2411-9717/2015/v115n8a12 ◽

2015 ◽

Vol 115 (8) ◽

pp. 755-760 ◽

Cited By ~ 7

Author(s):

X. Wang ◽

J. Bai ◽

W. Li ◽

B. Chen ◽

V.D. Dao

Keyword(s):

Longwall Mining ◽

Coal Bump

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Numerical investigation on the assessment and mitigation of coal bump in an island longwall panel

International Journal of Mining Science and Technology ◽

10.1016/j.ijmst.2013.08.001 ◽

2013 ◽

Vol 23 (5) ◽

pp. 625-630 ◽

Cited By ~ 7

Author(s):

Wang Hongwei ◽

Jiang Yaodong ◽

Zhu Jie ◽

Shan Ruyue ◽

Wang Chen

Keyword(s):

Numerical Investigation ◽

Coal Bump ◽

Longwall Panel

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Numerical analysis for the prediction of bump prone conditions: A southern Appalachian pillar coal bump case study

International Journal of Mining Science and Technology ◽

10.1016/j.ijmst.2020.12.020 ◽

2020 ◽

Author(s):

Christopher Newman ◽

David Newman

Keyword(s):

Numerical Analysis ◽

Coal Bump ◽

Southern Appalachian

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Decreasing coal bump risk through optimal cut sequencing with a non-linear boundary element program

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(92)91589-w ◽

1992 ◽

Vol 29 (1) ◽

pp. A68

Keyword(s):

Boundary Element ◽

Linear Boundary ◽

Coal Bump ◽

Non Linear ◽

Element Program

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Application of Distributed Optical Fiber Technology for Coal Bump Prevention

Shock and Vibration ◽

10.1155/2021/1753551 ◽

2021 ◽

Vol 2021 ◽

pp. 1-9

Author(s):

Han Liang ◽

Jun Han ◽

Zuoqing Bi

Keyword(s):

Optical Fiber ◽

Average Energy ◽

High Energy ◽

Hole Drilling ◽

Pressure Relief ◽

Coal Bump ◽

Working Face ◽

Fiber Technology ◽

Microseismic Events ◽

Distributed Optical Fiber

The 8939 working face in Xinzhouyao coal mine is a high coal bump proneness panel. For coal bump prevention, rib holes are drilled for pressure relief purpose. The deformational behaviour of the pressure relief borehole is studied using distributed optical fiber sensing technology. The strain of the surrounding coal and the pressure relief range were measured from 0 hrs to 402 hrs after hole drilling. Based on the analysis of pressure relief procedure, combining with borehole observation, the crack development, limited equilibrium, collapse, and compaction stages of the borehole were estimated as 0∼72 h, 72∼190 h, 190∼402 h, and greater than 402 h, respectively. Consequently, the hole drilling is modified to 110 m ahead of the working face to achieve better pressure relief effect. Microseismic monitoring shows that, after hole drilling optimisation, the high-energy microseismic events and average energy of microseismic events are reduced significantly.

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