跨采运输大巷动压显现规律研究

Research on rule of rock pressure behaviour in main haulage roadway for mining across over main roadway

随着矿井开采强度的不断增大和煤矿井田开采深度的日益增加,动压影响加剧,巷道围岩表现出明显的软岩特性,底鼓严重,围岩难以控制。针对徐州矿区垞城煤矿复杂的地质条件、工作面分布及施工状况,制定了-750 m轨道运输大巷动压显现观测方案,并对其进行了矿压监测,分析22107综放面开采对运输大巷变形破坏的影响,总结出该动压大巷的矿压显现规律,进而综合评价巷道支护现状,改善支护参数,为后期的巷道的修复提供依据。

With the increase of mining scale and depth, the dynamic pressure affects seriously. And the surrounding rock of roadway has obvious soft rock characteristics, such as roadway floor heave seriously, the surrounding rock controlled hardly and so on. In this paper, aimed at the complicated geological conditions, the working face layout and construction conditions, we made out the observation scheme of the dynamic strata behaviors of the -750 main transport roadway, and carried out the ground pressure monitoring. The influence of the 22107 working face mining on the deformation and failure of the main transport roadway in fully-mechanized coal mining is analyzed. Then, the law of the dynamic strata behavior of this roadway is summarized and the comprehensive evaluation of the roadway support is carried out to improve the support parameters, which can provide the reference on the roadway repairing in later time.