近距离煤层煤柱下工作面强矿压显现特征及控制研究

Study on Characteristics and Control of Strong Underground Pressure Appear under Coal Pillar of Short Distance Coal Seam

近距离煤层上位煤层遗留煤柱影响下煤层产生应力集中,导致下位煤层回采工作面冒顶、片帮。以山西上榆泉煤矿9#(上位)煤层开采后10#(下位)煤层回采工作面地质条件为工程背景,采用理论分析、数值模拟的方法,对煤柱下工作面矿压显现特征及工作面围岩稳定影响因素进行了研究,提出了以煤层层间距为分类指标,以控制工作面采高为主的采场围岩控制方案。

Under the influence of the residual coal pillar in the upper coal seam of short distance coal seam, the stress concentration in the coal seam leads to roof fall and rib spalling in the mining face of the lower coal seam. Shangyuquan coal mine 9(upper) 10(lower) coal seam mining face geological conditions as the research object, using theoretical analysis, numerical simulation method, under the coal pillar working face pressure behavior characteristics and working face surrounding rock stability factors were studied, put forward to the coal seam distance as the classification index, stope surrounding rock control scheme based on control the working face height.