上山掘进时卸压区安全宽度分析

Analyzing of safety width in depressurized area during raise driving

当工作面前方的卸压区达到一定长度时,该段煤体就会阻止突出发生。上山掘进时突出频繁发生,为找出卸压区的安全宽度,首先对掘进头前方煤体进行了一定的假设,进而从力学的角度分析掘进头前方煤体的应力分布状况,并进一步得出了计算卸压区安全宽度的方程组。如果给出具体矿井的地质条件,可以采用Mathcad计算出它的卸压区安全宽度。

It will prevent the outburst when the destressed zone that is in the front of working face reach some length.The outbutst takes place in the raise tunnelling frequently, with the object of looking for the safety width of the destressed zone ,and author supposed the coal that is in front of the tunneling place to be some state firstly, and analysed it's stress distribution from the mechanics point of view, and computed the equation group about the length of distressed zone that prevent the outburst.We can compute it's the safety width of the destressed zone by making use of Mathcad if the geological condition of mine is given.