斗南锰矿嘎科矿区急倾斜薄矿脉采矿法研究

就斗南锰矿嘎科矿区急倾斜薄矿脉采用无底柱全面采矿法存在的一些问题,提出了下向分段采矿方法试验方案。详细阐述了采场结构参数、采准切割工程布置、回采落矿方式、采场支护、主要技术经济指标和优缺点。     

原子态迭加与原子的压缩效应

本文研究了一类新的原子压缩态——原子本征态的相干迭加所展示的原子压缩效应;并讨论了这种迭加态与与真空场相互作用时原子的压缩效应,结果表明,原子在没有相干迭加的初始状态下其自发辐射过程中不呈现压缩效应。     

Mechanical analysis on deformation of surrounding rock with road-in packing of gob-side entry retaining in fully-mechanized sub-level caving face

Based on the movement regularity of surrounding rock with road-in packing of gob-side entry retaining in fully-mechanized sub-level caving face (RPGERFCF), the mechanical model of its surrounding rock was established and the calculating formulas of the deformation of the roof, coal wall and filling body were attained. By the mechanical analysis to the deformation of the surrounding rock of RPGERFCF, the major factors influencing the deformation of the surrounding rock were found out and the technologic approaches reduced the deformation and enhanced the stability of the surrounding rock were put forward. Consequently, the scientific bases were provided for the stability control of the surrounding rock of RPGERFCF. Supported by the National Science Foundation of China (50674046); National Science Important Foundation (50634050); Hunan Science Foundation (06JJ50092)