浅煤层保水开采技术研究

Study on Shallow Buried Coal Holding-watermining Technology

浅埋深矿井具有顶板基岩较薄、表土松散、覆岩随工作面推进全厚切落,无"三带"变形移动特点,存在突水危害,地表水资源流失。针对这一问题,在分析顶板导水裂隙发育特征基础上,从采煤方法本身入手,提出了一套系统的浅埋深煤层保水开采技术体系。该技术的要点主要有:加快工作面推进速度、确定合理支撑强度、顶板初次来压处限制厚开采、切眼处局部充填开采。经模拟分析表明,快速推进长壁工作面能够有效减弱覆岩含水层渗透性,减少水资源流失。

Shallow deep mine is with characteristics of thin bedrock, soil loose, with the working face advancing overlying strata full thickness cutting down, no ＂three zones＂ movement and deformation, water inrush hazards, surface water resources loss. Based on the analysis of the characteristics of the development of roof guide water cracks, the coal mining method itself, and a set of system for the shallow coal seam water protection and water extraction technology system was presented.. The main points of the technology were： speeding up the speed of the working face, setting the reasonable support intensity, thick mining limited at the roof first weighting place, and local filling mining in cut eye. The simulation analysis showed that the fast advancing long wall working surface could effectively weaken the permeability of the overlying strata, and reduce the loss of water resources.