为了研究西部矿区浅埋煤层开采造成的地裂缝灾害,以神东矿区为研究基地,对大柳塔矿22201,52304工作面开采的地裂缝进行了持续动态监测,研究了采动地裂缝的动态发育规律,建立了采动地裂缝发育深度和宽度、落差之间的定量函数关系模型,在此基础上,提出了采动过程中的临时性地裂缝治理标准和依据。研究表明:随着工作面的推进,采动过程中的临时性裂缝呈现"增大-减小-闭合"的动态规律;地裂缝发育深度与宽度之间存在线性增大的正比例关系,深度与落差之间存在对数关系;为保证安全生产,当"由上到下"扩展的地裂缝与"自下而上"发育的导水裂隙带贯通时,临时性裂缝需要治理,治理标准为导水裂隙带高度与地裂缝深度之和大于煤层埋深,治理依据为裂缝最大安全宽度或最大安全落差。
To study the ground fissure disaster caused by underground mining of shallow coal seam in western mining areas, with the Shendong mining area as research base, continual dynamical monitor was carded out of the ground fissures in the working face 22201 and the working face 52304 in Daliuta Coalmine, the dynamic developing law of ground fissure was studied, and the quantitative functional relationship model among the depth, width and gap of the ground fissure was established. On this basis, the governance standard and basis of temporary ground fissure during mining were proposed. The re- suits have shown that along with the advancing of the working face, the developing process of tempo- rary ground fissures takes the dynamic regularity of"increasing - decreasing - closing"; there is a linear increasing relationship between the depth and width of the ground fissure, and a logarithm relationship between depth and gap of the ground fissure; in order to ensure the safety in the underground coal pro- duction, while the ground fissure developing from ground to strata converges with the water flowing fractured zone developing from roof to strata, the temporary ground fissure should be governed. The governance standard is that the sum of water fractured zone height and ground fissure depth is greater than the burial depth of the coal seam, and the governance basis is the maximum safety width or the maximum safety gap of the ground fissure.