Acoupled biharmonic spline and linear interpolation algorithm was proposed to create a three-dimensional smooth deposit model with minimal curvature containing grade and position data. To obtain the optimal technical ...Acoupled biharmonic spline and linear interpolation algorithm was proposed to create a three-dimensional smooth deposit model with minimal curvature containing grade and position data. To obtain the optimal technical parameters, such as cuttingheight and drum diameter, a virtual longwall mining procedure was modelled by simulating the actual fully mechanized longwall mining process. Based on the above work, a bauxite deposit in a longwall mining panel was modelled by scattered grade data from ores sampled on the entry wall. The deposit was then demarcated by industrial indexes and sliced according to the virtual longwallmining procedure. The results show that the proposed interpolation algorithm can depict the stratiform structure of bauxite depositsand that the uncovered bauxite deposit has high proportions of high-grade and rich ore. The ranges of optimal cutting height and drum diameters are 1.72-2.84 m and 1.42-1.72 m, respectively. Finally, an intellectualized longwall mining procedure was designed to guide the mining process with the lowest dilution and loss rates.展开更多
针对无电、无网络情况下井下人员逃生定位和救援导航的难题,架构了井下地磁与RFID射频结合的井下定位方法 GRPM(Geomagnetic and Radio Positioning Method)。GRPM采用射频初定位、地磁特征精定位的主动定位模式,适合应急避险与救援定...针对无电、无网络情况下井下人员逃生定位和救援导航的难题,架构了井下地磁与RFID射频结合的井下定位方法 GRPM(Geomagnetic and Radio Positioning Method)。GRPM采用射频初定位、地磁特征精定位的主动定位模式,适合应急避险与救援定位需求。根据井下高精度地磁测量数据和井下地磁"日变"规律,分析了井下巷道地磁数据具有带状连续、区域易突变的数据特点。采用了分段线性法、最近邻域法和三次曲面法插值方法和MSD,HD和NPROD三种匹配准则,开展了地磁基准构建和地磁匹配定位的仿真实验。实验结果表明:分段线性插值法适合小区域巷道地磁基准建立,拟合快速,精度较高,符合井下巷道磁场分布的收敛性。NPROD定位匹配模型适合井下人员动态行走定位,匹配速度快,达到2/3格网精度,满足精确定位要求。展开更多
基金Project(11472311)supported by the National Natural Science Foundation of ChinaProject(2015CX005)supported by the Innovation Driven Plan of Central South University of ChinaProject(2015zzts083)supported by the Fundamental Research Funds for the Central Universities of Central South University,China
文摘Acoupled biharmonic spline and linear interpolation algorithm was proposed to create a three-dimensional smooth deposit model with minimal curvature containing grade and position data. To obtain the optimal technical parameters, such as cuttingheight and drum diameter, a virtual longwall mining procedure was modelled by simulating the actual fully mechanized longwall mining process. Based on the above work, a bauxite deposit in a longwall mining panel was modelled by scattered grade data from ores sampled on the entry wall. The deposit was then demarcated by industrial indexes and sliced according to the virtual longwallmining procedure. The results show that the proposed interpolation algorithm can depict the stratiform structure of bauxite depositsand that the uncovered bauxite deposit has high proportions of high-grade and rich ore. The ranges of optimal cutting height and drum diameters are 1.72-2.84 m and 1.42-1.72 m, respectively. Finally, an intellectualized longwall mining procedure was designed to guide the mining process with the lowest dilution and loss rates.
文摘针对无电、无网络情况下井下人员逃生定位和救援导航的难题,架构了井下地磁与RFID射频结合的井下定位方法 GRPM(Geomagnetic and Radio Positioning Method)。GRPM采用射频初定位、地磁特征精定位的主动定位模式,适合应急避险与救援定位需求。根据井下高精度地磁测量数据和井下地磁"日变"规律,分析了井下巷道地磁数据具有带状连续、区域易突变的数据特点。采用了分段线性法、最近邻域法和三次曲面法插值方法和MSD,HD和NPROD三种匹配准则,开展了地磁基准构建和地磁匹配定位的仿真实验。实验结果表明:分段线性插值法适合小区域巷道地磁基准建立,拟合快速,精度较高,符合井下巷道磁场分布的收敛性。NPROD定位匹配模型适合井下人员动态行走定位,匹配速度快,达到2/3格网精度,满足精确定位要求。
