科研之友
微信
新浪微博
Facebook
分享链接
摘要
According to the theory of water-resisting key strata, on the basis of the established mechanical model of inclined coal seam floor water-resisting key strata with linear increased water pressure, the deflection properties, stress distribution and broken characteristics of the inclined floor water-resisting key strata were analyzed. Then the dangerous area of water-inrush from the inclined floor was identified. The results have indicated that the maximum deflection value of floor water-resisting key strata obviously decreases with the pitch, and the maximum deflection point position hardly deviates from the middle of workface, but it also goes downward;due to tensile yield, the failure first appears in the downward position of the long side midpoint of the inclined floor water-resisting key strata, the failure in the lower boundary region is prior to that in the upper boundary region, and broken cracks of an asymmetrical "X"type are formed in the inner of the inclined floor water-resisting key strata;before the ground pressure of the inclined stope, the midpoint downward position of the goaf edges is the dangerous area of water-inrush, and when the ground pressure comes, the coal wall is the dangerous area;the upper and lower boundary region of the goaf is also the dangerous area during mining.
- 出版日期2017
- 单位安徽大学
