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1)  change of underground pressure
矿山压力变化
1.
Gas emission characteristics and management of coal caving based on change of underground pressure;
矿山压力变化的采场瓦斯涌出特征及其管理
2)  underground pressure
矿山压力
1.
Monitor study on broken floor depth caused by underground pressure;
矿山压力对底板破坏深度监测研究
2.
Based on the analysis of roof water-inrush source,the relationship between water-inrush from roof and underground pressure and rockburst was revealed.
在分析4煤层开采顶板突水水源的基础上,揭示了矿山压力、冲击地压同顶板突水之间的关系,探讨了煤层开采过程中顶板突水对促进冲击地压形成的影响作用机理;基于物理流变学和断裂力学理论,提出了砾岩粒间隙中的水流失导致砾岩粒界面附近多层次应力局部集中,造成砾岩产生新的断裂,形成多层次冲击地压,促进顶板斑裂线扩展的机制,阐明了冲击地压和顶板突水互为影响的因果关系,从理论研究和现场监测2个方面得出了华丰煤矿4煤层开采深度大于520 m时容易形成冲击地压的结论。
3)  rock pressure
矿山压力
1.
Summarize of practical rock pressure sensors;
实用矿山压力传感器综述
2.
The caving of thick and strong roof stratum,key stratum,causes tremendous rock pressure in mine.
采场上覆岩层中的厚硬岩层,即厚硬关键层,其冒落会造成剧烈的矿山压力显现。
3.
Based on the measured stress results with hydraulic fracture method in a mine, the variation of waterresisting ability for floor rock mass under effecting of geostress and rock pressure is analysed and discussed.
以某深部矿井水压致裂应力测量资料为依据,分析了煤层底板岩体在矿山压力和原始地应力的联合作用下,在阻抗水能力方面的变化。
4)  ground pressure
矿山压力
1.
According to the surveyed data, the authors have studied the influence of caving face to roadway in floor, and revealed the behaviour law of ground pressure around roadway under caving face and the basic characteristics of the stress field in floor.
以井下实测资料为依据,研究了综放面底板采动应力场对跨采巷道的作用,揭示了综放面底板采动应力场的基本特征及其跨采巷道矿山压力显现规律。
2.
Based on the measured data the main characteristics of ground pressure in a sub-level caving face are as the following:(1) The working resistance of powered support is not greater than that of supports used in a single coal seam or in top slice of a coal seam; (2) The external load exerted on the support used in sub-level caving face generally moves forward.
以放顶煤工作面实际观测资料为基础,论述了放顶煤工作面矿山压力显现的主要特征:(1)液压支架工作阻力不大于单一煤层或上分层开采时的支架工作阻力;(2)放顶煤工作面的支架外载荷普遍前移。
3.
The development of ground pressure and strata control now are facing some urgent tasks such as mining coal safely and effectively,raising the recovery rate of coal resources and controlling the environ- mental damage caused by mining.
矿山压力和岩层控制理论与技术的发展,当前面临着煤炭安全高效开采、提高矿井资源回采率及开采造成的环境损害控制等方面的紧迫任务,推进开采设计决策与管理的现代化是今后发展的主要方向,加强矿山压力与岩层控制的研究是基础,应大力开展几项重点课题的研究。
5)  mine ground pressure
矿山压力
6)  mine pressure
矿山压力
1.
This article analyses basic characteristics of coalseam roadway mine pressure in Yunguang Mine from the theory and gives out feasible methods of supporting the roadway in accordance with the actual situations in the mine.
从理论上分析了大同煤矿集团公司云冈矿煤层巷道矿山压力的基本特点,并针对实际情况提出了巷道支护的可行方法。
2.
The paper introduces how to predict pressure situation of face by the mine pressure theory and how to prevent roof from cutting and splitting based on exploiting in the Xinzhouyao Mine.
以大同煤矿集团公司忻州窑矿为例,针对"两硬"条件下综采工作面开采过程中,工作面顶板经常在煤壁处剪断,出现工作面台阶下沉,甚至大面积垮顶的问题,介绍运用矿山压力理论,预报工作面来压形式,及人工强制放顶预防顶板剪切断裂的方法。
3.
There are many reasearch method for mine pressure,this thesis introduced ground observation by the example of E1106 work face of State-run Xinji No.
有关矿山压力的研究方法较多,本文以国投新集二矿E1106综采工作面为例,详细介绍现场矿压观测法。
补充资料:ANSYS中在任意面施加任意方向任意变化的压力方法
在任意面施加任意方向任意变化的压力
在某些特殊的应用场合,可能需要在结构件的某个面上施加某个坐标方向的随坐标位置变化的压力载荷,当然,这在一定程度上可以通过ANSYS表面效应单元实现。如果利用ANSYS的参数化设计语言,也可以非常完美地实现此功能,下面通过一个小例子描述此方法。
!!!在执行如下加载命令之前,请务必用选择命令asel将需要加载的几何面选择出来
!!!
finish
/prep7
et,500,shell63
press=100e6
amesh,all
esla,s
nsla,s,1
! 如果载荷的反向是一个特殊坐标系的方向,可在此建立局部坐标系,并将
! 所有节点坐标系旋转到局部坐标系下.
*get,enmax,elem,,num,max
dofsel,s,fx,fy,fz
fcum,add !!!将力的施加方式设置为"累加",而不是缺省的"替代"
*do,i,1,enmax
*if,esel,eq,1,then
*get,ae,elem,i,area !此命令用单元真实面积,如用投影面积,请用下几条命令
! *get,ae,elem,i,aproj,x !此命令用单元X投影面积,如用真实面积,请用上一条命令
! *get,ae,elem,i,aproj,y !此命令用单元Y投影面积
! *get,ae,elem,i,aproj,z !此命令用单元Z投影面积
xe=centrx !单元中心X坐标(用于求解压力值)
ye=centry !单元中心Y坐标(用于求解压力值)
ze=centrz !单元中心Z坐标(用于求解压力值)
! 下面输入压力随坐标变化的公式,本例的压力随X和Y坐标线性变化.
p_e=(xe-10)*press+(ye-5)*press
f_tot=p_e*ae
esel,s,elem,,i
nsle,s,corner
*get,nn,node,,count
f_n=f_tot/nn
*do,j,1,nn
f,nelem(i,j),fx,f_n !压力的作用方向为X方向
! f,nelem(i,j),fy,f_n !压力的作用方向为Y方向
! f,nelem(i,j),fz,f_n !压力的作用方向为Z方向
*enddo
*endif
esla,s
*enddo
aclear,all
fcum,repl !!!将力的施加方式还原为缺省的"替代"
dofsel,all
allsel
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条