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Submitted:
20 November 2024
Posted:
21 November 2024
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This article discusses the continuous miner technology used in bord and pillar mining technology with the proposal of strata control by roof blasting. The main objective of the roof blasting in the goaf is to initiate induced caving to minimise abutment load in and around the working face to prevent incidences of coal bump, goaf swelling, pillar spalling and air-blast. It was stated that decision of roof blasting is subjected to the nature of local roof falls, results of strata monitoring study and hanging span of roof strata near the line of extraction. Special attention was paid to empirical and numerical simulation techniques for different geotechnical elements and structures involved during mechanised depillaring panel of Tawa-I mine. It was found that thanks to numerical simulation related to the determination of gallery width, cut-out distance and rib/snook as well as simulation for estimation of rock load height at different places in the panel as well as by applying strata control by roof blasting continuous miner technology can be successful used with improved efficiency and safety in difficult and complex geomining conditions of Indian underground coal mines.
Zhijie Zhu
et al.
,
2018
Xiaowu Huang
et al.
,
2023
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