摘要
运用正交方法进行数值试验,分析不同因素对综放采场控顶区顶煤下沉量的影响规律,并提出相应的控制方法。研究结果表明:(1)控顶区内顶煤下沉量与5个因素显著相关,影响程度依次为:埋深>煤的单轴抗压强度>支架支撑力>煤厚>工作面长度;(2)根据实际条件,可通过顶煤注水或爆破降低煤强度、提高支架初撑力、减少工作面长度等措施控制顶煤的下沉量。(3)数值试验和现场实测对比结果说明各因素对顶煤下沉量综合影响规律的结论是可靠的。
Based on the numerical experiment through orthogonal method, the effects of dif- ferent factors were studied on the subsidence of top coal in roof-control area in fully mechanized caving face, and the corresponding control methods were proposed. Some conclusions were drawn as follows. （1）The subsidence of top coal is significantly related to five factors and in turn by in fluence degree they are- buried depth 〉 uniaxial compressive strength of coal 〉the support set- ting load 〉 thickness of coal seam 〉face length. （2）Some measures can be taken to control the subsidence of top coal, such as reducing the uniaxial compressive strength of coal by top coal in- jection or blasting, improving the support setting load, reducing face length, etc.. （3）The re- sults of numerical experiment and field measurement suggest that the above conclusions are reliable.
出处
《中国煤炭》
北大核心
2012年第3期62-65,共4页
China Coal
关键词
综放采场
顶煤下沉量
影响因素
数值试验
控制方法
fully mechanized caving face, top coal subsidence, influence factors, numericalexperiment, control method
