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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 4    December 1999

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Energy method and numerical simulation of critical backfillheight in non-pillar continuous mining
Deng Jian(邓建); Gu Desheng(古德生); Li Xibing(李夕兵); Peng Huaisheng(彭怀生)

College of Resource; Environment and Civil Engineering; Central South University of Technology; Changsha 410083; P. R. China

Abstract:Non-pillar continuous mining(NPCM) is regarded as a high-efficient, high-level and one-step mining technology, which can be divided into two substopes. Back fill stability status in substope I, which directly influence the loss rate and dilution rate, etc, will determine whether the experimental research is successful or not. By employing energy method of limit analysis and finite element numerical simulation method, the critical backfill height was determined under the prerequisite condition of its stability, which put forward theoretical basis for reasonable and correct selection of backfill's parameters. The result showed that the first backfill could not keep stable for NPCM, while the other was able to.

 

Key words:  continuous mining; critical height; energy method; numerical simulation

ISSN 1672-7029
CN 43-1423/U

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