综放面过上分层终采线冲击地压危险性分析

综放工作面过上分层终采线时容易发生冲击地压现象，综放面接近上分层终采线时，前方煤体可看成是煤柱，可作为煤柱型，中击地压来分析，煤柱型冲击的主要影响因素有煤层的刚度和顶板岩层的刚度，具体反映在煤层的强度和冲击倾向性、顶板的来压和加速运动等。采用改变煤体物理力学性质的办法，可以防治煤柱型冲击地压的发生。东滩煤矿两个综放面过上分层终采线工作面的监测结果、治理效果说明了此冲击地压现象。

Analysis on danger of pressure bump when fully mechanized sublevel caving mining face passed through terminal mining line of top slicing seam

A mine pressure bumping phenomenon often occurred when a fully mechanized caving mining face passing through the terminal mining stop line of the top slicing seam is a problem occurred in the coal mining process. When the fully mechanized caving face closed to the terminal mining stop line of the top slicing seam, the front coal seam could be analyzed as a coal pillar pressure bumping. The main influence factors of the coal pillar bumping are the seam rigidity and the roof rock rigidity. The detail influences are the seam rigidity, bumping tendency, roof pressure and accelerated movement. With an improved method to change the coal physical mechanics property, it is possible to prevent and control the coal pillar pressure bumping occurred. The monitoring and measurement results, control resuhs and bumping phenomenon of tow mechanized caving mining faces passing through the terminal mining stop line in top slicing seam ware showed the correction of the above analysis.