Title: Wongawilli roadway backfilling coal mining method - a case study in Wangtaipu coal mine

Authors: Liqiang Ma; Zhiyuan Jin; Wenpeng Liu; Dongsheng Zhang; Yao Zhang

Addresses: State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China; College of Earth and Mineral Sciences, The Pennsylvania State University, State College, Pennsylvania 16802, USA ' School of Mines, Guizhou Institute of Technology, Guiyang, Guizhou 550003, China ' College of Earth and Mineral Sciences, The Pennsylvania State University, State College, Pennsylvania 16802, USA ' State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China ' State Key Laboratory of Coal Resources and Safe Mining, School of Mines, China University of Mining and Technology, Xuzhou 221116, China

Abstract: The current backfilling coal mining methods still have many limitations, such as lack of filling time and filling space and poor coordination between filling time and filling space. On the basis, this paper proposed the Wongawilli roadway backfilling coal mining method (WRBCM). As a pattern of 'backfilling while mining', WRBCM gives fully play to the advantages of the Wongawilli mining method and the backfilling mining method. The research results have been put into practice in Wangtaipu coal mine. As the recovery ratio of coal resources in the panel reached 96.8%, the values of surface deformation were smaller than the indicators for building damage grade I in China. WRBCM also implements the safe and efficient coal mining deposited under 'buildings, railways and water bodies'. [Received: June 20, 2016; Accepted: January 28, 2017]

Keywords: Wongawilli roadway backfilling coal mining method; WRBCM; mining roadway; mining phase; backfilling while mining; Wangtaipu.

DOI: 10.1504/IJOGCT.2019.098457

International Journal of Oil, Gas and Coal Technology, 2019 Vol.20 No.3, pp.342 - 359

Received: 20 Jun 2016
Accepted: 28 Jan 2017
Published online: 25 Mar 2019 *

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