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以陕西彬长矿区4#煤层巷道为研究背景,采用现场的工业实践的方法,通过回采工作面和掘进工作面进行松动圈探测,确定采动和掘进过程影响下,巷道两帮的松动圈范围。以此为基础对煤体内部结构进行分析,判断煤体内部破坏情况,同时为确定两帮锚杆支护长度的设计提供依据,也是煤层巷道围岩稳定性的评价的重要依据。
Taking the 4 # coal seam roadway in Binchang Mining Area of Shaanxi Province as the research background, the method of on-site industrial practice was used to detect the loose ring through the mining face and the heading face to determine the range of loose ring of the two roadways under the influence of mining and driving process . Based on this, the internal structure of coal body is analyzed, the internal damage of coal body is judged, at the same time, the basis for determining the length of two supporting bolts is provided, which is also the important basis for the evaluation of surrounding rock stability.