深部应力型突出灾害的声发射监测工艺及预警试验研究

发布时间：2018-04-26 12:08

本文选题：深部矿井 + 应力型突出　；参考：《煤矿安全》2017年02期

【摘要】：为研究深部应力型突出灾害的声发射预警方法,采用底抽巷穿层布设传感器的新工艺,开展了深部矿井掘进面动力灾害的声发射监测工艺探索及预警试验。结果表明,穿层传感器适宜布置在底板中,且与煤层的距离宜控制在1~2 m,试验煤层传感器的有效监测距离为40 m。当掘进面处于高地应力区域时,声发射参数出现脉冲式增大;掘进面处于一般应力区域时,声发射参数处于较低水平。声发射参数与钻屑量的对比分析表明,声发射参数与钻屑量变化具有一致性,且超前于钻屑量指标。在传感器穿层布设新监测工艺条件下,声发射参数的变化可以反映工作面的煤岩瓦斯动力灾害地应力致因的变化。
[Abstract]:In order to study the acoustic emission early warning method of deep stress type outburst disaster, the acoustic emission monitoring technology and early warning test of dynamic disaster of deep mine excavation surface are explored and tested by adopting a new technology of placing sensors through the bottom drawing roadway. The results show that the transducers are suitable to be arranged in the floor, and the distance to the coal seam should be controlled at 1 ~ 2 m, and the effective monitoring distance of the sensor in the test coal seam is 40 m. When the tunneling surface is in the region of high ground stress, the acoustic emission parameter increases in pulse mode, and the acoustic emission parameter is at a lower level when the heading surface is in the general stress region. The comparison and analysis of acoustic emission parameters and drilling chip quantity show that the variation of acoustic emission parameters is consistent with that of drilling chip quantity, and it is ahead of the drilling chip quantity index. The change of acoustic emission parameters can reflect the change of in-situ stress caused by coal and gas dynamic disasters in coal face under the condition of the new monitoring technology of sensor layer placement.
【作者单位】：瓦斯灾害监控与应急技术国家重点实验室;中煤科工集团重庆研究院有限公司;
【基金】：国家自然科学基金资助项目(51604298,51574280) 中煤科工集团重庆研究院有限公司自立资助项目(2015YBXM39)
【分类号】：TD713

【相似文献】