西曲矿12315运输巷矿压显现特征及支护技术

西曲矿12315运输巷成巷后围岩变形破坏严重,通过现场勘查和矿压监测研究表明,临近工作面采动影响下,顶板严重下沉,底板遇水膨胀底鼓严重,采用“强顶强底”的支护理念,增加顶板锚索数量提高顶板的支护强度,采取底板隔水措施抑制底鼓。现场应用后矿压监测结果表明,采动影响下巷道顶板离层量很小,底板底鼓量最大为208 mm,顶板下沉量小于60 mm,两帮总相对移近量小于73 mm,巷道变形量能够满足工作面回采期间的正常使用。

Characteristics and Supporting Technology of Strata Behavior in 12315 Belt Way of Xiqu Coal Mine

Based on the support concept of enhancement of support both in roof and floor,the number of roof anchors has been increased and the water-proof measures have been adopted.The on-site strata behavior monitoring shows that after the application of support-enhancement measures,the roof separation and floor deformation are very small with the floor heave 208 mm,the roof sinking less than 60 mm,the total relative movement of the two ribs is less than 73 mm,and the amount of roadway deformation can meet the normal requirement during mining.