上行开采煤层减损的工作面合理布设位置研究

Research on Reasonable Layout Position of Working Face for Reducing Coal Seam Damage in Upward Mining

以枣泉煤矿五分区1煤的上行开采问题为背景,为了达到1煤的减损目的,借鉴协调减损开采的思想,采用相似模拟、数值计算的研究方法,确定了沿煤层倾向先期开采煤层工作面之间的相对布设位置和范围。采用下沉、水平移动、倾斜、曲率、水平变形5个指标,对1煤的移动变形程度和均匀性进行了评价。结果表明:当工作面在合理布设范围之内时,可以促使遗留煤柱位置处1煤进一步充分下沉,移动变形指标均达到该地质采矿条件的最均匀程度,可以有效抵消由于遗留煤柱影响而引起的待上行开采煤层的变形不均问题,使多次采动成为上行开采的有利条件,达到1煤的减损目的。

Take the upward mining problem of No.1 coal seam in the fifth mining area of Zaoquan coal mine as the background.In order to achieve the goal of reducing the loss of No.1 coal seam,drawing on the idea of harmonic extraction,similar simulation and numerical calculation research methods are used to determine the relative layout position and range between the working faces of the early mining coal seam along the coal seam inclination.The degree and uniformity of movement and deformation of the No.1 coal seam were evaluated using five indicators:subsidence,horizontal movement,inclination,curvature,and horizontal deformation.The results indicate that when the working face is within the reasonable layout range proposed,it can promote the further full subsidence of the No.1 coal seam at the location of the remaining coal pillar,and the movement and deformation indicators can reach the most uniform degree of the geological mining conditions.It can effectively offset the uneven deformation problem of the coal seam to be mined upstream caused by the impact of the remaining coal pillar,making multiple mining favorable conditions for upward mining and achieving the goal of reducing the damage of the No.1 coal seam.