综放开采煤层支承压力分布规律现场实测分析

依据谢桥矿1151（3）综放面开采地质及技术条件，采用钻孔应力计对工作面回采过程中煤柱和工作面煤层及巷帮侧向实体煤的应力进行观测。研究分析表明，在非对称开采条件，回采期间工作面及巷道周围煤层应力分布规律明显不同，煤柱和工作面煤层沿走向在工作面前方存在支承压力峰值，但巷帮侧向实体煤沿走向在工作面前方并不存在应力峰值，其峰值在采空区后方，而煤柱和巷帮侧向实体煤沿倾向均存在应力峰值，邻近工作面煤柱及工作面煤层应力均处于降低区。

Analysis on site measurement of support pressure distribution law for seam of fully mechanized longwall top coal caving mining

According to the geological and technical conditions of the No.1151(3) fully mechanized longwall top coal caving mining face in Xieqiao Mine,the borehole stress meters were applied to measure the stresses in the coal pillars,mining seam and gateway side coal ribs during the mining process of the coal mining face.The research results showed that under the dissymmetrical mining condition,the stress distribution law in the seam of the coal mining face and surrounded round the mining gateway during the coal mining period were obviously different.There were support pressure peaks at the front area of coal pillars and coal mining face in strike direction.There was no pressure peak at the front of the coal pillars and in strike direct coal seam of mining gateway and the pressure peaks occurred at the rear part of the mining goaf.There were stress peaks both in coal pillars and the mining gateway's side coal seam in inclines direction.The stresses in the coal pillars near the coal mining face and the seam at the coal face were in a stress reducing area.