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在突出危险煤层中进掘准备巷道时,在工作面前方会形成一个应力、透气性、瓦斯压力、煤体结构都出现明显变化的影响带.在一定条件下,对强度、结构和瓦斯动态参数加以对比,可以确定出巷道接近工作面区的突出危险程度.为了准确、可靠地预测这些有突出危险性参数趋向的可能性,必须直接地或者间接地对其进行定量和定性测定。这时,最可靠的信息,就是在近工作面区内打
When excavating and preparing the roadway in the dangerously dangerous coal seam, there will be an influence belt with obvious changes in stress, gas permeability, gas pressure and coal structure in front of the working face.Under certain conditions, the strength, structure and gas dynamic parameters In contrast, the apparent risk of approaching a laneway to the working face area can be determined, and in order to accurately and reliably predict the likelihood of these tendency-prominent risk parameters, they must be quantitatively and qualitatively determined, directly or indirectly. At this moment, the most reliable information is to hit in the near working face area