期刊
CANADIAN GEOTECHNICAL JOURNAL
卷 47, 期 9, 页码 947-954出版社
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/T10-009
关键词
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资金
- National Basic Research Program of China (973 Program) [2010CB226805]
- Shandong Province Natural Science Fund [Z2008F01]
- Program for Changjiang Scholars and Innovative Research Team in a university
- Key Laboratory of Mine Disaster Prevention and Control of Education Ministry
- Shandong Province of China
The complex coal seam structure and hard roof at the Muchengjian Mine were studied, and the equivalent tensile strength of the roof was determined by a retrospective analysis of similar roof cave-ins. The prop spacing or number of hydraulic props required per unit area were obtained by analyzing the roof caving span and thickness. The early warning threshold bedding vertical separation velocity for hard roof caving at the Muchengjian Coal Mine was determined to be about 14 mm/day, and the newly invented bedding separation remote monitoring system'' (BSRMS) was used for the first time for early warning of a roof fall. A total of 48 trials of early warning roof weighting were performed at the Muchengjian Mine. It was found that not only were all the early warnings accurate, but the support system was also safe and reliable.
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