Experiments simulating the effect of coal mine stopping through a fault zone were designed based on a working face of the Qianqiu coal mine in Yima, China. Through simulation of the physical process of fault reactivat...Experiments simulating the effect of coal mine stopping through a fault zone were designed based on a working face of the Qianqiu coal mine in Yima, China. Through simulation of the physical process of fault reactivation and coal bumps, the displacement of the surrounding strata and evolution characteristics of fault stress under the effect of mining were studied. The mechanism of fault reactivation induced by coal mining was analyzed. The results show that shortly before fault reactiva- tion, the normal stress and shear stress increased rapidly and the risk of a fault slip occurring was also increased. The fault reac- tivation, caused by the mining activity, occurred when the working face was 25-35 m from the fault along the hanging wall. The influence of mining increased the possibility of fault reactivation, while the local failure of the bearing capacity of the working face was the direct cause of the fault slip. Our results indicate that the influence of fault slip on the coal of the working face had a transient impact and acted as a loading-unloading function.展开更多
为了分析新疆区域影响飞行的航路天气要素及其可预报性,构建航路天气要素预报系统,文章利用2020—2021年收集的话音方式航空器空中报告进行统计分析。结果表明,新疆区域航路天气主要包括颠簸和积冰,其中颠簸主要发生在高层,成因主要为急...为了分析新疆区域影响飞行的航路天气要素及其可预报性,构建航路天气要素预报系统,文章利用2020—2021年收集的话音方式航空器空中报告进行统计分析。结果表明,新疆区域航路天气主要包括颠簸和积冰,其中颠簸主要发生在高层,成因主要为急流;积冰主要发生在中层,成因主要为高空槽,因此可以利用数值预报对颠簸、积冰进行诊断分析。世界区域预报中心提供的WAFS(World Area Forecast System)产品中包括高分辨率的颠簸、积冰诊断结果,文章利用此资料构建新疆区域航路预报系统,可向用户提供由点到面的融合类产品,为区域飞行提供客观、可靠的航路天气参考。展开更多
基金Supported by the Major State Basic Research Development Program Fund （2010CB226801） the National Natural Science Foundation of China （50704034） the State Key Laboratory of Coal Resources and Safe Mining Open Research Fund （SKLCRSM11KFB08）
文摘Experiments simulating the effect of coal mine stopping through a fault zone were designed based on a working face of the Qianqiu coal mine in Yima, China. Through simulation of the physical process of fault reactivation and coal bumps, the displacement of the surrounding strata and evolution characteristics of fault stress under the effect of mining were studied. The mechanism of fault reactivation induced by coal mining was analyzed. The results show that shortly before fault reactiva- tion, the normal stress and shear stress increased rapidly and the risk of a fault slip occurring was also increased. The fault reac- tivation, caused by the mining activity, occurred when the working face was 25-35 m from the fault along the hanging wall. The influence of mining increased the possibility of fault reactivation, while the local failure of the bearing capacity of the working face was the direct cause of the fault slip. Our results indicate that the influence of fault slip on the coal of the working face had a transient impact and acted as a loading-unloading function.
文摘为了分析新疆区域影响飞行的航路天气要素及其可预报性,构建航路天气要素预报系统,文章利用2020—2021年收集的话音方式航空器空中报告进行统计分析。结果表明,新疆区域航路天气主要包括颠簸和积冰,其中颠簸主要发生在高层,成因主要为急流;积冰主要发生在中层,成因主要为高空槽,因此可以利用数值预报对颠簸、积冰进行诊断分析。世界区域预报中心提供的WAFS(World Area Forecast System)产品中包括高分辨率的颠簸、积冰诊断结果,文章利用此资料构建新疆区域航路预报系统,可向用户提供由点到面的融合类产品,为区域飞行提供客观、可靠的航路天气参考。
