摘要
运用相似模拟实验,以平煤矿区主采煤层丁、戊组煤岩为原型进行研究,发现随着远距离保护层的开采,顶板覆岩裂隙区经过了卸压、失稳、起裂、张裂、裂隙萎缩、变小、吻合、封闭的演化过程;上覆岩层由下而上非线性下沉,且移动形态非对称,这种演化过程直接影响了采空区内瓦斯的解吸、流动及储集。
By using the similar simulation experiment, pingdingshan mine area as the prototypes, it＇s found crack area after pressure relief, instability, from the taking D,E group in the main coal layer of that as the mining progresses, the roof rock crack, tension crack, crack shrink, smaller, consistent, closed evolution; the bottom subsidence of overlying strata is non-linear, movihg forms are non-symmetrical. This evolution directly affects desorption, flow and reservoir of ~ob ~as.
出处
《煤炭技术》
CAS
北大核心
2012年第3期97-99,共3页
Coal Technology
基金
预防煤矿瓦斯动力灾害的基础研究项目(973项目)(2005CB221500)
关键词
远距离保护层
破裂
冒落
沉降
distance protection layer
break
faUing
subsidence
