The Effect On Movement And Deformation For Slope Of The Surface Under The Underground Mining

Mineral resources and our survival is closely related and China’s industrial80%raw materials comes from mineral resources, while China’s energy more than95%comes from the mineral resources. However, environmental issues especially mine geological disasters becoming significant with the development of China’s economic and exploitation of mineral resources.Nowadays, no theory or method can fully applicable to expected of different terrain movement and deformation as the mining movement and deformation affected by many factors. Such as mountainous ground movement and deformation affected by surface factors, its rules isn’t fully grasped nowadays. According to the biggest characteristic of mountainous surface is ups and downs of different slopes, study the effect of the surface slope of surface movement deformation is conducive to a more comprehensive understanding the laws and characteristics that mountainous area of mining induced surface movement and deformation.Based on the system analysis of strata movement and deformation caused by coal mining in the plain of general characteristics and in the mountainous area of special characteristics, by using numerical simulation method for0degrees,10,20and30degrees slop of the surface and so on to simulate ground movement and deformation. Then, summary and deformation characteristics of rock mass under different slope based on the analysis of the results of numerical simulation under different surface slope. Studies have shown that:1、Affected by slope slippage, the location of maximum subsidence values deviate from the center of the mined area and this shift greater with the increase in surface slope.2、When the face position just below the slope, with the increase in surface slope the maximum surface subsidence on the main section gradually increases and the difference between the two values of largest surface horizontal displacement gradually increased.3、According to the slope slippage along the downhill direction,the subsidence of subsidence curve at the position of slope has some increases.4、Horizontal movement value exists a certain degree of increase and the expand of horizontal movement influence turn bigger where the location of the curve in the horizontal movement curve of face left. Horizontal movement value exists a certain degree of decreace and the expand of horizontal movement influence turn smaller where the location of the curve in the horizontal movement curve of face right.