Bayramoglu Law Offices LLC
Method for classifying phreatic leakage disaster level in shallow coal seam mining
A method for classifying a phreatic leakage disaster level in shallow coal seam mining includes the following steps: S1. arranging a monitoring hole in a coal mine working face and burying a telemetering water level gauge to perform water level monitoring; S2. monitoring a ground elevation, calculating a ground subsidence amount, and collecting mining advance distance information; S3. plotting variation relationship curves of mining advance distance and phreatic water level as well as mining advance distance and ground subsidence according to monitored information, respectively; and S4. comparing the curves with a no-leakage graph, a slight-leakage graph, and a heavy-leakage graph, and determining a leakage level; and S5. further classifying a studied area as an environmental disaster area or an environmentally friendly area.
CHINA UNIVERSITY OF MINING AND TECHNOLOGY
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E21F E21C E21C
inventional inventional additional
Weichi Kaifang Qiqing Zhi Wenping
Chen Fan Wang Yang Li