摘要
震动波波速与应力的正相关关系说明利用矿山CT技术反演震动波波速可大范围研究采掘区域的应力分布特征,从而划分冲击危险区域。在此背景下,综合采用理论研究、数值计算和现场实测数据分析相结合的研究方法,设计了己15#-24080工作面矿山CT技术现场实施方案,建立了沿直接顶传播的滑行波和沿煤层传播至接收点的直达波波速的二维求解模型,求解了己15#-24080工作面区域的煤岩震动波波速分布图,最后基于冲击矿压机理提出的正异常危险性评价指标,分级确定了5个冲击危险区域及其范围。现场动力显现表明该技术能够准确探测冲击危险区域。
The positive relation between tremor wave velocity and stress reveals the fact that the mine CT technology can be used to inversely analyze the tremor wave velocity, so as to study the stress distribution in mining area and determine the areas with burst risk on a large scale. Therefore, theoretical research, numerical calculation and field measurement methods are syn- thetically adopted to design the field implementation scheme of mine CT in F15--24080 working face, and construct the 2--D solution model for velocities of sliding wave transmitting along the immediate roof and direct wave propagating to receiving point along the coal seam to calculate dis- tribution result of wave velocity in coal rock in the face, and then five areas with burst risk and the scope are graded and determined based on the positive risk assessment indexes anomaly pro- posed through the mechanism of rock burst. The field dynamic events show that the mine CT technology could accurately detect the areas with burst risk.
出处
《中国煤炭》
北大核心
2013年第11期55-60,共6页
China Coal
关键词
震动波波速
采掘区域
冲击矿压
危险性评价
矿山CT技术
正异常
tremor wave velocity, mining area, rock burst, risk assessment, mine CT tech- nology, positive anomaly
