岩土工程学报2012，Vol.34Issue(4)：686-692,7.
厚松散层薄基岩采动诱发水砂流运移特征试验
Experimental study on migration characteristics of mixed water and sand flows induced by mining under thin bedrock and thick unconsolidated formations
摘要
Abstract
The startup, migration and inrush processes of the mixed water and sand flows in the overburden fractured channel are studied by designing and manufacturing the test model, which can be used to simulate the migration and inrush of mixed flows. The characteristics of the mixed water and sand flows in various types of fractured channels are investigated. Three stages of the mixed-flow migration and three types of the mixed water and sand inrush are brought forward. Based on the caving zone and the water flowing fractured zone channel of overburden by mining, the fracture channel sidewalls of the mixed flows are divided into three types： straight and smooth wall without filling, rough and stepped wall without filling and soft mud substance with filling. The numerical tests on the three types are carried out. The variation characteristics of water pressure at different positions of the fractured channel are revealed considering the variations of widths, inclination angles and sidewall types of the fractured channel under the water pressure of 0.05 MPa and 0.1 MPa. The results show that the water and sand inrush instantly occur in the mined area. Based on the characteristics of water pressure variations, the migration process of the mixed flows in the fractured channel is divided into three interdependent stages： increasing stage, stability stage and outburst stage. According to the characteristics of the water pressure variations during the mixed-flow inrush, the mixed-flow outburst is divided into three basic types： direct outburst type, saltatory outburst type and gentle slope outburst type. Therefore, the migration characteristics and dynamic mechanism of the mixed flows are explored.关键词
薄基岩/厚松散层/水砂流/运移特征Key words
thin bedrock/thick unconsolidated formation/mixed water and sand flow/migration characteristic分类
矿业与冶金引用本文复制引用
杨伟峰,吉育兵,赵国荣,沈丁一..厚松散层薄基岩采动诱发水砂流运移特征试验[J].岩土工程学报,2012,34(4):686-692,7.基金项目
国家自然科学基金青年科学基金项目 （）
中国博士后基金面上资助项目：江苏省高校优势学科建设工程资助项目 （）
