Experimental Study on the Mining-Induced Water-Resistance Properties of Clay Aquicludes and Water Conservation Mining Practices
نویسندگان
چکیده
The Yushen mining area contains thin bedrock and a shallow buried coal seam, where JingLe group Hipparion clay Lishi loess serve as high-quality cement insulation cover. This study investigates the properties of layer to determine effect aquiclude on water variation fracture characteristics. Unloading hydraulic jack experiments were performed test physical mechanical structure was analyzed in detail. experimental results show that affects soil cracks, leading crack opening subsequent bridging. permeability coefficient initially increases with increased unloading then decreases. A theoretical model is developed recovery mechanism based spatial movement clay. indicate formation waterproof cover type mud protection. Design methods are proposed optimize pillar size. Mining damage leads mud-covered bridge belt, which can be designed appropriately reduce protective thickness. applied Hao Jialiang 2301 working face. provide important insight characteristics layers an reference for accurately calculating size parameters pillars under mud-cap conditions increase upper limit
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ژورنال
عنوان ژورنال: Advances in Civil Engineering
سال: 2021
ISSN: ['1687-8086', '1687-8094']
DOI: https://doi.org/10.1155/2021/4868998