凌宁矿上行开采可行性分析

Lingning Coal Mine Upward Mining Feasibility Analysis

上行开采的可行性主要取决于下矿层开采后,引起上覆岩层移动、变形和破坏是否破坏了上矿层整体性。根据下矿层开采后引起的上覆岩层冒落带、裂隙带及弯曲下沉带("三带")的赋存状态,如果上矿层位于冒落带范围之内,其整体性必然遭到严重破坏,在现有开采技术条件下不可能进行回采;如果上矿层位于裂隙带以上,虽然矿层受力生成裂隙,但仍能保持矿层的整体性,原则上是可采的。为了开采的可靠性和安全性,下层开采形成的冒落带顶部边界应与上层的底板具有一定的安全距离,防止"蹬碴"作业和采矿机械陷落等不安全生产状况发生。

The feasibility of ascending mining mainly depends on the seam mining,cause overlying strata movement and deformation and destruction is destroyed on seam integrity. According to the next seam mining caused by overburden caving zone,fissure zone and bend subsidence zone（ the ＂ three zones＂） occurrence state,if the seam is located in caving zone range,its integrity will badly damage,the existing mining technical conditions impossible stoping; if the seam is located in the fissure zone above,although the seam stress formation fracture,but can still keep seam integrity,in principle is the recoverable. The lower the formation of mining caving zone top boundary should be and upper floor has a certain distance,prevent ＂ tic dross＂ homework,mining machinery depression can＇t safety production situation for reliability and safety of mining.