采矿与安全工程学报Issue(4)：499-505,7.
松散承压含水层特征对其载荷传递特性的影响研究
Study on the influence of the characteristic of unconsolidated confined aquifer on its property of load transfer
摘要
Abstract
In response to the issue of prevention of support crushing and water inrush disaster during mining under unconsolidated confined aquifer, a specialized simulation experiment set based on the mechanism of aquifer load transfer has been designed and the influence of occurrence characteristic of unconsolidated confined aquifer on its property of load transfer and key stratum compound breakage has been studied. The result indicates that load transfer effect on the unconsolidated confined aquifer is closely related to its framework grain characteristic. The larger the skeleton granule diameter is, the simpler the component is, and the better the property of flowing and replenishment is. Therefore it can transfer load to top overburden continuously and uniformly and make the load on top of overburden larger, which easily causes overburden integral breakage and results in support crushing and water in-rush disaster. While the smaller the framework grain diameter is, the more complex the component is, and the poorer the property of flowing and replenishment is. Load applying on top of overburden can reduce during mining and aquifer load transfer coefficient can become smaller. Therefore, key stratum breaks layer by layer and hardly causes support crushing and water inrush. Calculating method of load transfer coefficient of unconsolidated confined aquifer has been confirmed. Load transfer coefficient should be 0.83 to 0.94 in alluvial and pluvial fan area of Qidong coal mine, while non-alluvial and pluvial fan area should be 0.69 to 0.71.关键词
松散承压含水层/载荷传递/关键层复合破断/压架突水Key words
unconsolidated confined aquifer/load transfer/key stratum compound breakage/support crushing and water inrush分类
矿业与冶金引用本文复制引用
王晓振,许家林,朱卫兵,王欢..松散承压含水层特征对其载荷传递特性的影响研究[J].采矿与安全工程学报,2014,(4):499-505,7.基金项目
国家“十二五”科技支撑计划项目(2012BAK04B06)；江苏高校优势学科建设工程项目；国家自然科学基金项目(51204160，51174288) （2012BAK04B06）
