问题 问答题 简答题

试归纳地表岩移观测站的观测内容、程序、方法和精度要求 。

答案

参考答案:

答:地表移动观测站的基本任务就是定期、重复测定所埋测点在采动过程中的位臵变化。

观测内容为:

(1)观测站连测;

(2)单独进行水准测量;

(3)地表破坏的测定、编录工作。实际观测工作是在测点埋设10~15天后,一般即可进行观测。

(1)观测站连测应独立进行两次,测量某一控制点或观测线交点平面坐标,按其精度不低于近井点的精度,其余控制点平面坐标,可用5’’导线的测角和量边方法进行测定。观测点、控制点的高程,用三等水测量的方法,自矿区高程控制点引测。

(2)采前全面观测要求两次,在各工作测点进行实际位臵测量,包括高程测量、距离丈量和支距测量,高程测量按三等水测量要求进行,边长采用钢尺丈量,支距用经纬仪正侧镜测量。

(3)巡视测量:在一般情况下,每隔4~5天进行一次。观测几个受采动影响测点的高程。

(4)采动后全面观测:对一条观测线上所有的高程测量,尽可能在一日内完成。可采用单程附合水准路线或往返水准支线,按四等水准要求进行。量边和支距测量,按采动前测量要求进行,活动期间进行不和于四次的全面观测。

(5)加密水准测量:在活跃期间增加水准测量。

(6)最后全面观测:开采结束后,地表移动逐渐转入裹退期,直至稳定。此期间一般每隔1~3月测量一次测点高程,直至各点高程6个月内的下沉值不大于30mm为止。这时,就可进行全面观测,按采前全面观测的要求独立进行两次。在进行上述各项测量工作的同时,还要进行裂缝测量。

多项选择题
完形填空
完形填空。

      Peter and Paul had got permission from their parents to camp in a field close to their
farm.But,being adventurous boys,they knew it would be more   1   to camp in the woods
that lay beyond the river.Excitedly,the boys   2   with their tent and food.
     Carrying their heavy   3  ,the two brothers walked along the riverbank,hardly noticing
the distance or the sun beating down.They were eager to reach their   4   before lunchtime.
As they entered the cool,shadowy woods,they began to search for a suitable camping spot.
Peter wanted to   5  close to the river at the edge of the woods,  6   Paul,who was older,
insisted that they camp further away.  7  ,Peter followed his brother deeper into the   8  .
"This really is a wonderful setting!" said Paul in excitement.They   9   their tent,and settled
down to eat the sandwiches they had made,then decided to find their way   10   to the river
to catch some fish.
     "Are you sure that this is the right   11  ?" whispered Peter shakily."I'm sure we passed that
hollow tree just a while ago." Paul walked   12   silently."Look,there it is again.We're lost,aren't
we?" complained Peter.Paul had to admit that he didn't know where they were.  13  ,they were
a long distance from where they were   14   to be.They were not even   15   of where they had
set up their camp.They set in   16   for a few minutes until Peter had a bright idea."Why don't we
look for clues(线索)the way that trackers   17   in the movies?We weren't careful about how we
 walked,so I'm sure we would have left   18   some broken tree branches and leaves."
     Carefully,the boys   19   the marks that they had left,until finally they found their campsite.
Hurriedly,they packed their belongings and set off   20   the direction of the river. 
      What would their parents think of their adventure?

( )1.A.surprising  
( )2.A.went round  
( )3.A.load        
( )4.A.grassland  
( )5.A.live        
( )6.A.but        
( )7.A.Unconsciously
( )8.A.woods      
( )9.A.put off    
( )10.A.forward    
( )11.A.place      
( )12.A.alone      
( )13.A.After all  
( )14.A.discovered
( )15.A.afraid    
( )16.A.enjoyment  
( )17.A.appear    
( )18.A.behind    
( )19.A.fetched    
( )20.A.for        
B.exciting    
B.went back    
B.tent        
B.destination  
B.lie          
B.and          
B.Unfortunately
B.farm        
B.put on      
B.near        
B.mark        
B.about        
B.At last      
B.encouraged  
B.sure        
B.satisfaction
B.do          
B.out          
B.watched      
B.to          
C.annoying    
C.went away    
C.food        
C.field        
C.wait        
C.or          
C.Unwillingly  
C.setting      
C.put down    
C.back        
C.way          
C.in          
C.Above all    
C.persuaded    
C.informed    
C.disappointment
C.work        
C.aside        
C.followed    
C.at          
D.frightening    
D.went through  
D.storage        
D.river          
D.stay          
D.so            
D.Uninterestingly
D.camp          
D.put up        
D.further        
D.time          
D.on            
D.At first      
D.supposed      
D.reminded      
D.imagination    
D.behave        
D.around        
D.collected      
D.in