复合顶板“三带”高度相似试验研究

Similar test research on "Three Zones height" of complex roof

安徽矿区某矿的1116(1)工作面主采11-2煤,标高-691.117m～-550.20m,具有典型的复合结构顶板。开采11-2煤能够消除上方法距70m的13-1煤的突出危险性。建立平面相似材料模拟试验,通过模拟实际开采的动态过程,结合顶板的跨落规律,确定出冒落带高度为15.6m,相当于采高的4.59倍,导水裂隙带高度在煤层顶板以上0～45.5m范围内,约为采高的13.38倍。

Anhui mine an ore of 1116 （ 1 ） the mining main mining 11 -2 coal, elevation -691.17m -550. 20m typical composite structure roof. Mined 11 -2 on methods to eliminate coal a 13 - 1 outburst coal 70 meters away. Establish a plane similar material simulation test, and simulate the dynamic process of the actual mining, combined with the roof the cross falling regulation, determine the height of the caving zone 15.6m, equivalent to mining high of 4. 59 times the water flowing fractured zone height the seam roof above 0 - 45.5m within about mining high of 13.38 times.