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据英刊《采矿杂志》198 9年 3月报道,英国采矿咨询有限公司最近在英国煤炭公司的西部矿区成功地完成了一项岩巷锚杆支护试验。试验结果是在地下深860m、长420m的掘进中的D型巷道围岩布置监测点、进行12个月的监测获得的。 对常规的拱型钢支架支护和用有规则的锚忏加固的拱型钢支架支护的围岩变形特征进行比较,得出如下结论。 l.锚杆支护区域的围岩累积移近量比常规的拱型钢支架减少50鲍。2.锚杆支护区域的顶板下沉显著减小。3.锚杆支护K域的两帮移近量明显减小
According to the British magazine Mining Magazine in March 1919, British Mining Consulting Ltd. successfully completed a rock bolting support test in the British coal mining company’s western mine. The test results are obtained from the monitoring points for the surrounding rock of D-type roadway in the tunneling of 860m underground and 420m long, which is monitored for 12 months. Comparing the deformation characteristics of the surrounding rock of the conventional arched steel support and the arched steel support with the regular anchorage, we draw the following conclusions. l. The total amount of surrounding rock accumulation near the bolt support area is reduced by 50% compared with conventional arch steel brackets. 2. The roof subsidence of the bolt support area is significantly reduced. 3. The amount of bolt support K domain near the two shift significantly reduced