承压含水层上协调开采底板岩体采动影响规律的观测研究

Survey Study on the Influence Laws of the Floor over Pressure Aquifer by Harmonic Mining

承压含水层上近距离煤层协调开采是以防止底板突水为目的 ,减轻底板采动影响程度的特殊开采方法 .本文根据实际观测资料 ,论述了通过调控协调开采步距 ,使下层工作面的超前支承压力与上层工作面应力释放区的张应力迭加 ,达到支承压力与张应力相对消减 。

Harmonic mining over pressure aquifer near coal seam is a special mining method.Its purpose is to avoid water inrush and to reduce the mining influence of the floor.The paper introduces the measure of harmonic mining distance based on survey data.This measure balances the compressive stress from the lower working face and the tensile stress from the upper working face,and maximumly decreases the mining influence of the floor.