【摘 要】
：
<正> 朝川矿务局一矿设计年产量45万吨,主井是斜井双码箕斗提升。在提升下行过程中,曾因主井口煤仓已满,堆煤高于箕斗底部扇型门,产生阻力,致空箕斗不能下行,造成松绳。由于
论文部分内容阅读
<正> 朝川矿务局一矿设计年产量45万吨,主井是斜井双码箕斗提升。在提升下行过程中,曾因主井口煤仓已满,堆煤高于箕斗底部扇型门,产生阻力,致空箕斗不能下行,造成松绳。由于煤仓底部给煤机不停的输送,仓里的煤自行下落,阻力消失后,停止状态的箕斗在重力的作用下向下滑行,瞬间产生极大的冲击力,将钢丝绳拉断,造成箕斗堕落井底
其他文献
Fish culture in earthen ponds is an important source of income for farmers in northern Thailand. Water quality in ponds has strong impacts on fish production fa
A waterfall highlights the locus of active fluvial erosion of bedrock, and its mechanism has been the subject of several studies;however, erosional processes re
4.触发信号处理电路（如图5所示）点火器的触发信号接入形式为先负后正。在磁电机里,磁钢上的触发点转到与触发器刚刚对齐的时刻,触发器内部磁通量开始增加,触发线圈输出正的触发
随着工作面单产、掘进速度的提高、开采深度的加深,传统的 U型通风方式愈来愈不能满足要求,因而相继出现了 W、双 Z 等新型的通风系统。这些新通风方式有一半以上采面是下行
This work presents the results of complex gravity observation performed at Shults Cape, Gamov peninsula (42.58°N, 131.15°E), Russia. Absolute laser gr
在五彩缤纷、多姿多彩的世界摩坛上,定制摩托车是一支奇葩,数量稀少但风格独特,在充斥着千篇一律、规格统一的量产型摩托车的市场中更显得特立独行、分外打眼。
Sarfirouzabad district, located in the Kermanshah province, is an eastward extension of Mahidasht Plain, one of the archaeologically well-known regions of the C
Asymptotically bounded velocity profiles describe the vertical velocity variations in compacted sediments in a more realistic way than unbounded velocity models
后发优势是一个集综合性、全面性、广泛性于一体的复杂系统，它决定了后发国家在工业化过程中追赶先发国家的过程是一个整体追赶而非部分追赶的过程。在这个复杂系统中，人力后发
The currently accepted theory of self-exciting dynamo generating magnetic field of the Earth and its shortage of energy is critically reviewed. Based on thermod