首页|Influence of backfilling rate on the stability of the"backfilling body-immediate roof'cooperative bearing structure

Influence of backfilling rate on the stability of the"backfilling body-immediate roof'cooperative bearing structure

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To reduce the cost of backfilling coal mining and utilize the underground space of coal mines,a new back-filling mining method with low backfilling rate called constructional backfilling coal mining(CBCM)is proposed.The"backfilling body-immediate roof'cooperative bearing structure of CBCM is analyzed by establishing the model of the medium thick plate on an elastic foundation.The influence of the backfilling rate on the stability of overlying strata is analyzed by the numerical simulation experiment.The control effect of CBCM is verified by a physic similar simulation test.The economic benefit of CBCM is analyzed.The conclusions are:the deformation characteristics of the immediate roof and critical backfilling spacing in CBCM can be analyzed based on the Hu Haichang's theory.Exerting the bearing capacity of the imme-diate roof is beneficial to the stability of the overlying strata.The CBCM has a good control effect on the overburden in Xinyang Mine when the backfilling rate is lower than 25％.The backfilling cost of per ton coal is 37.39 yuan/t when the backfilling rate is 13.7％,with a decrease rate of 56.63％than the full-filling.The research results can provide theoretical support for the application of CBCM in coal mining.

Constructional backfilling coal miningImmediate roofCooperative bearing structureMedium thick plate on elastic foundationBackfilling rateOverlying strata

Xianjie Du、Guorui Feng、Min Zhang、Zehua Wang、Wenhao Liu

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College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China

Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan 030024,China

Key Laboratory of Shanxi Province for Mine Rock Strata Control and Disaster Prevention,Taiyuan 030024,China

State Key Laboratory for GeoMechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China

Zhengzhou Coal Industry(Group)Co,Ltd,Zhengzhou 450007,China

College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China

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国家自然科学基金青年基金国家杰出青年科学基金Science and Technology Innovation Project of Colleges and Universities in Shanxi Province中国博士后科学基金Shanxi-Zheda Institute of Advanced Materials and Chemical EngineeringShanxi-Zheda Institute of Advanced Materials and Chemical Engineering

52004173519254022020L00662022M7129222021SX-TD0012022SX-TD008

2022

矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCDSCIEI
影响因子：1.222
ISSN：2095-2686
年,卷(期)：2022.32(6)
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