上榆泉煤矿Ⅰ031001工作面巷道围岩松动圈测试与分析

Measurement and Analysis of Broken Rock Zone of Surrounding Rock in Ⅰ031001 Working Face in Shangyuquan Coal Mine

为了优化上榆泉煤矿锚杆支护参数,采用CLC1000-C型超声波围岩裂隙探测仪对Ⅰ031001工作面辅运顺槽围岩松动圈的3个剖面进行了测试,Ⅰ号剖面距巷道开口处160 m,Ⅱ号剖面距巷道开口处400 m,Ⅲ号剖面距巷道开口处612 m;根据测出的岩石波速-深度曲线,分别得出Ⅰ、Ⅱ、Ⅲ号3个剖面9个测点的松动圈厚度。研究结果表明,在距巷道开口612 m处,巷道实体煤帮松动范围最大达到1.65 m;在距巷道开口400 m处,巷道正帮松动范围最小达到0.65 m;通过改进两帮施工条件及工艺参数存在缩小松动圈范围的可能。此次测试结果为上榆泉煤矿巷道的支护参数优化设计提供了可靠的依据。

To optimize bolt supporting parameters,the CLC1000-C ultrasonic detector for rock crack in surrounding rock was used to test three sections of the broken rock zone of surrounding rock in the auxiliary transportation gateway on Ⅰ031001 working face in Shangyuquan Mine.Section Ⅰ,Ⅱ,and Ⅲ are located at 160,400,and 612 meters,respectively,away from the roadway throat.Based on the wave velocity-depth curves,the thickness of the broken rock zone at 9 measuring points ofsection Ⅰ,Ⅱ,and Ⅲ were obtained.The results showed that:the maximum loosening range of the solid coal reaches 1.65 meters at 612 meters from the roadway throat;the minimum loosening range of the main side reaches 0.65 meters at 400 meters away from the roadway throat.It is possible to reduce the loosening zone by improving the construction conditions and process parameters of the two sides.The test results could provide a reliable basis for the optimization design of the support parameters in Shangyuquan Mine.