摘要:
针对赵庄二号井西轨大巷构造破碎区巷道围岩变形、喷浆层开裂、顶板淋水的问题,通过分析巷道顶板淋水来源和围岩结构特征,提出了该巷道淋水封堵原则,并通过现场试验的方法,对大巷围岩顶板和巷帮封堵注浆施工顺序、注浆钻孔管路固定、封孔工艺以及注浆压力等技术工艺进行了分析。工业试验表明:巷道围岩浅部节理裂隙通过构造裂隙与巷道顶板裂隙含水层导通,是形成巷道顶板淋水的原因。提出了“先帮后顶,帮部由下向上,顶板先两侧后中间”的累积注浆施工工艺,确定该巷道顶板注浆压力为2~4 MPa,巷帮注浆压力为4~6 MPa。
Abstract:
Aiming at the problems of deformation of surrounding rock, cracking of grouting layer and roof watering in the structural fractured area of western rail roadway of Zhaozhuang No. 2 well, based on the analysis of the source of dripping water on the roof of roadway and the structural characteristics of surrounding rock, the principle of dripping water treatment in this roadway is proposed. And through the method of field test, the paper analyzes the grouting construction sequence, grouting pipe fixation, hole sealing technology and grouting pressure. The industrial test shows that the joints and fissures in the shallow part of the surrounding rock are channeled through the structural fissures and the fissure aquifer of the roof of the roadway, which is the cause of the water pouring on the roof of the roadway. The cumulative grouting construction process of “first two walls and then roof, two walls from bottom to top, roof from both sides to the middle” was proposed, and the grouting pressure of the roadway roof was determined to be 2 MPa to 3 MPa, and the grouting pressure of the roadway top was 4 MPa to 6 MPa.
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