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针对厚煤层双向凹字形布巷系统的工作面长度,分析了影响工作面长度的地质因素、地质构造、煤层厚度、强度和倾角、顶、底板岩性等。分析影响工作面长度的技术因素,在不同的稳定层距煤层底板距离下,基于工作面长度方向损失率确定工作面最小长度,从矿压角度考虑支承应力对确定工作面长度的影响。
Aiming at the working face length of double-direction concave zonal laneway system in thick coal seam, the geological factors, geological structure, coal seam thickness, strength and inclination, roof and floor lithology which affect the length of working face are analyzed. Based on the technical factors that affect the working face length, the minimum working face length is determined based on the loss rate of working face length under the different distance from the stable floor to the coal floor, and the effect of bearing stress on the determination of working face length is considered.