Title: Technical system and mining pressure law of full mining and local filling in a deep mine

Authors: Jiaqi Wang; Qiang Zhang; Jixiong Zhang; Wei Yin; Yunbo Wang; Qi Zhang

Addresses: School of Mines, China University of Mining and Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China ' School of Mines, China University of Mining and Technology, Xuzhou 221116, China ' School of Mines, China University of Mining and Technology, Xuzhou 221116, China ' The Key Laboratory for Traffic and Transportation Security of Jiangsu Province, Huaiyin Institute of Technology, Huaian 223003, China ' School of Mines, China University of Mining and Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China ' School of Mines, China University of Mining and Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China

Abstract: To reduce the problems of mining disturbance and ecological environment damage in deep mining, a full mining and local filling technology is proposed. The technology is further divided into segmented full mining and local filling technology and holistic full mining and local filling technology. This technology's design process and technical system are described, and the calculation methods of basic parameters such as filling length, caving length, and mining height are put forward. FLAC analyses the mining pressure distribution law of the working face. The field verification results show that after adopting the technology, the maximum surface subsidence is only 68 mm, the active resistance of the hydraulic support in the working face is stable, the advancing speed of the shearer reaches 90 m/month, and the filling capacity reaches 500,000 t/a. This technology can realise mining safety and environmental protection. [Received: December 18, 2021; Accepted: May 9, 2022]

Keywords: filling mining; deep mining; environmental protection method; full mining and local filling; mining pressure law.

DOI: 10.1504/IJOGCT.2023.132495

International Journal of Oil, Gas and Coal Technology, 2023 Vol.33 No.4, pp.369 - 387

Received: 13 Dec 2021
Accepted: 09 May 2022
Published online: 24 Jul 2023 *

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