海孜煤矿煤层构造规律及预测

REGULARITY ANALYSISON COAL SEAM STRUCTURES AND FORECAST EFFECT FOR HAIZI COAL MINE

在井下详细调查的基础上 ,对已采区中小型煤层断层和层滑构造进行了深入研究 ,结果表明 ,断层展布以北东向为主 ,大都为层间断裂 ,成带等距排列。层滑是以北西—南东滑动方向为主体的复合式构造 ,它常发育在 7、8、1 0等煤层顶板附近 ,而对 7、8煤层破坏最严重 ,这是 7、8煤层急剧增厚变薄以致不可采的主要原因。煤层变薄带不仅在平面上的展布具有方向性、等距性和分区性等特点 ,而且还表现为不同方向的叠加复合。构造对煤矿生产经营产生了多种影响 ,在工作中利用构造规律 ,对未采区进行构造预测 ,取得了显著效果。

Based on detailed underground investigation,faultsand layerslipson mid and small scale in coalseams ofmined areas are studied.The results have shown thatfaults extended generally in NE direction.The mostofthem are layer faults,ar raying isometrically.The layer slips are compound structures with NW SE extending direction,which often occurred near the tops ofcoalseams No.7,8and1 0 .The coalseams No.7and8were fractured severely,caused the thickness ofcoalseams No.7 and 8increase and decrease rapidly.The thinned coalseams are notonly ofdirectionalcharacteristics,isometric characteristics, butalso show superimposed compounds from differentdirections.The above stated characteristicsofstructureshavea strong im pacton coalproduction.Using known regularities,the structure characteristics in unmined area are forecasted,resulting notable economic benefits.