论文部分内容阅读
结合矿山典型工作面开采技术条件,把顶板岩层、煤层和底板岩层作为一个整体进行综合研究,考虑三者之间的作用与影响,利用弹性薄板和岩石力学理论,对老顶初次来压、周期来压、煤岩体强度参数降低等情况下工作面煤层底板岩层破坏深度的理论值进行了计算,得出了工作面长度和煤层底板岩层破坏深度之间的关系,定量地分析了工作面长度与煤岩体强度参数对煤层底板破坏深度的影响,为承压水开采下增加面长提供了理论依据。
According to the technical conditions of the mining face, the roof strata, coal seam and floor rock strata are comprehensively studied as a whole. Considering the effect and influence of the three, using the theory of elastic thin plate and rock mechanics, The theoretical value of the failure depth of coal seam floor rock under the condition of the coal seam rock mass strength parameter decreasing and so on is calculated and the relationship between the working face length and the rock bottom destruction depth is obtained. With the influence of coal and rock mass strength on the depth of coal seam floor, it provides a theoretical basis for increasing the surface length under the confined water extraction.