特厚煤层煤巷围岩松动破坏规律

The Laws of Surrounding Rock Loose Destruction in Special Thick Coal Seam

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 Shaanxi Binchang Mining Area 4# coal seam roadway as the research background, using filed industrial practice meth- od, the loose circle range between two sides of the roadway under the influence of the mining and tunneling process is determined through the measure carried out in mining face and beading face. Based on this, the internal structure of the coal body is analyzed and the internal damage situation of coal body is judged, which provides the designing basis for determining the length of the two groups of bolt support. The test is also an important basis for the evaluation of surrounding rock stability of the coal seam.