Using numerical simulation method,we studied the stress distribution of overlying coal rock body and the pressure-relief and deformation rules of protected coal seam under the situation of far distance lower protective seam exploitation,obtaining the stress distribution characteristics,scope of pressure relief,and deformation rules etc.
运用计算机数值模拟方法,对远距离下保护层开采上覆煤岩体应力分布、被保护层卸压变形规律进行研究,得出下保护层开采被保护层应力分布特征、卸压范围、变形规律等。
This article analyses the imagery theory of barrage jamming on SAR,introduces the concept of protective distance and builds an arithm.
分析了SAR雷达压制干扰的成像原理,引用了保护距离的概念,建立压制干扰的数学模型,进行了参数的选择,并对SAR的干扰效果进行了计算机仿真,通过结果的输出,验证了通过保护距离进行压制干扰效果定量评估方法的正确性和可行性。
Research on Pressure Relieved and Permeability Enhanced Caused by Exploitation of the Far Distance Lower Protective Coal Seam
远距离下保护层开采卸压增透特性研究
protection in remote control system
远距离控制系统保护
Practical Circuit of Open-phase Protection In Long-distance Motor Operation;
电动机远距离运行断相保护的实用电路
A research on mine gas inflow regularity during gas extraction in contiguous protective coal seams and gas control
近距离保护层开采瓦斯涌出规律及治理研究
Study on the Support Technology of the Rodaway in the Loose Coal Seam Below Close Range Goaf;
近距离采空区下松散煤层巷道支护技术研究
overreach distance protection equipment
过范围距离保护装置
blocking distance protection equipment
闭锁式距离保护装置
integrated circuit distance relay device
集成电路距离保护装置
Research on the Setting Principles of Quadrangle Distance Relay Applicated in the Transformer Remote Backup Protection
用于变压器远后备保护的四边形距离继电器整定原则的研究
The protective effects of non-wound legs ischemic postconditioning on patients with ischemia/reperfusion myocardial injury
远距离缺血后适应对急性心肌梗死溶栓再通患者的保护性研究
at long [short, close] range
在远 [近] 距离
An analysis of source of mine gas in faces in extracontiguous protective seams and a study on optimization of Y-Γ ventilation system
超近距离保护层工作面瓦斯来源分析及Y+Γ型通风系统优化研究
Tunneling short distance protector prevention coal and gas prominent engineering research
近距离保护层采场巷道掘进的防治煤与瓦斯突出技术研究
Study on Mining Technology of Protective Layer Under Long Distance in Pingdingshan Mining Area
平顶山矿区远程下保护层开采技术研究
Research of the Microcomputer Distance Protection in Single Source and Short Distance Transmission Line;
单电源短距离输电线微机距离保护装置的研制
give a person a wide berth = give a wide berth to a person = keep a wide berth of a person
避开 [远避] 某人,与某人保持距离
The farther from the impact, the more calls people made.
离被撞楼层距离越远，人们打的电话越多。
The Optimizing Design of Bolting Support Multi-coal Seams and Little Intervals Roadway;
近距离煤层群巷道锚杆支护优化设计