在试验地点无烟煤层厚1.5米,其覆盖岩层深度760米,因为在这个地段试验区是唯一的开采煤层,所以没有来自下方或上方采场的相互影响。但是,估计在回采工作面存在巨大的支承压力。煤层的直接顶板是含砂岩夹层的薄层泥岩,底板是较软的耐火粘土。在主要运输平巷选择了一段200米进行监测和试验,其中头50米没用锚杆支护, At the test site, the anthracite layer is 1.5m thick and covers a rock depth of 760m. Because the test area in this area is the only coal seam to be explored, there is no interaction from below or above the stope. However, it is estimated that there is a huge amount of support pressure on the mining face. The direct roof of the coal seam is a thin layer of mudstone with sandstone intercalations and the floor is softer refractory clay. In the main transport lane selected a 200 meters for monitoring and testing, of which the first 50 meters useless bolt support,