微震异常区CT反演监测预警技术应用

李允生; 徐德生; 马志锋; 周海军; 郭文豪

doi:10.13272/j.issn.1671-251x.2021030074

微震异常区CT反演监测预警技术应用

doi: 10.13272/j.issn.1671-251x.2021030074

1.
1. 山东东山古城煤矿有限公司, 山东济宁 272000;
2.
2. 徐州弘毅科技发展有限公司, 江苏徐州 221018;
3.
3. 中国矿业大学矿业工程学院, 江苏徐州 221116

基金项目:

国家自然科学基金项目(51674253)。

详细信息

作者简介:
李允生(1975-)，男，山东枣庄人，高级工程师，现主要从事煤矿安全生产及技术管理工作，E-mail：994081935@qq.com。

中图分类号: TD324
计量
- 文章访问数: 154
- HTML全文浏览量: 17
- PDF下载量: 19
- 被引次数: 0
出版历程
- 收稿日期: 2021-03-23
- 修回日期: 2021-09-16
- 刊出日期: 2021-12-20

Application of CT inversion monitoring and early warning technology in microseismic anomaly area

1.
Shandong Dongshan Gucheng Coal Mine Co., Ltd., Jining 272000, China;
2.
Xuzhou Hongyi Technology Development Co., Ltd., Xuzhou 221018, China;
3.
School of Mines, China University of Mining and Technology, Xuzhou 221116, China

摘要

摘要: 针对微震监测仅能反映微震所在区域危险性、CT反演监测不能及时反映当前工作面危险程度等问题，以山东济宁东山古城煤矿3105工作面为工程研究背景，提出了微震-应力多维信息监测预警方法，将短期的微震监测和中长期震动波CT反演监测技术相结合对工作面冲击危险区域进行判识，并结合基于中长期CT反演的大范围监测结果，利用工作面周边的微震数据对其修正，实现对工作面中长期应力演变及短期微震集聚的实时、动态监测预警。针对3105工作面2019年8月近1个月微震事件的时空分布异常情况，判断工作面前方变窄的区段煤柱区域为应力异常区域，采用CT反演技术进行危险区域划分和预警：依据CT反演结果，给出强冲击和中等冲击危险区域范围，确定3105工作面高波速冲击危险区域位于工作面材料巷和运输巷超前100～200 m区域；根据CT反演结果，按照分区管理原则，对高波速冲击危险区域采取了相应的煤层大直径钻孔、煤体爆破和深孔爆破卸压相结合的卸压解危措施。应用结果表明，利用震动波CT反演技术能准确预测两巷高波速与压力异常区对应关系，有效预测冲击危险区域，且能够区分危险等级；在高波速危险区域实施卸压措施后，有效降低了该区域微震频次及能量，微震频次及能量分别由515、12×10⁵ J降低至338、5.98×10⁵ J，下降了34.4%、50.2%，卸压效果明显。
- 冲击地压 /
- 微震异常区 /
- CT反演 /
- 监测预警 /
- 爆破卸压 /
- 钻孔卸压
Abstract: In order to solve the problems that microseismic monitoring can only reflect the danger of the area where the microseisms are located, and CT inversion monitoring cannot reflect the current danger level of the working face in time, taking the 3105 working face of Dongshan Gucheng Coal Mine in Jining, Shandong as the engineering research background, a microseismic-stress multi-dimensional information monitoring and early warning method is proposed. The method combines short-term microseismic monitoring and medium and long term seismic wave CT inversion monitoring technology to identify the impact dangerous area of the working face. And the method combines the large-scale monitoring results based on medium and long term CT inversion, uses microseismic data around the working face to correct them so as to realize the real-time and dynamic monitoring and early warning of the medium and long term stress evolution of the working face and short-term microseismic accumulation. According to the abnormal situation of spatial and temporal distribution of microseismic events in August 2019 in 3105 working face for nearly one month, it is judged that the coal pillar area of the narrowing section in front of the working face is the abnormal stress area, and the CT inversion technology is adopted for dangerous area division and early warning. According to the results of CT inversion, the range of dangerous areas of strong and medium impact is given, and the high wave velocity impact dangerous area of 3105 working face is determined to be 100-200 m ahead of the material roadway and transportation roadway of the 3105 working face. According to the results of CT inversion, in accordance with the principle of zoning management, the corresponding pressure relief measures combining large diameter drilling of coal seam, coal blasting and deep hole blasting pressure relief are adopted for the high wave velocity impact dangerous area. The application results show that the seismic wave CT inversion technology can predict the corresponding relationship between high wave velocity and abnormal pressure area in two roadways accurately, predict the impact dangerous area effectively and can distinguish the danger level. After implementing pressure relief measures in dangerous areas with high wave velocity, the microseismic frequency and energy in the area are reduced effectively. The microseismic frequency and energy are reduced from 515, 12×10⁵ J to 338, 5.98×10⁵ J, are decreased 34.4% and 50.2% respectively. The pressure relief effect is obvious.
- rockburst /
- microseismic anomaly area /
- CT inversion /
- monitoring and early warning /
- blasting pressure relief /
- drilling pressure relief

HTML全文

参考文献(18)

[1]	齐庆新,李一哲,赵善坤,等.我国煤矿冲击地压发展70年:理论与技术体系的建立与思考[J].煤炭科学技术,2019,47(9):1-40. QI Qingxin,LI Yizhe,ZHAO Shankun,et al.Seventy years development of coal mine rockburst in China:establishment and consideration of theory and technology system[J].Coal Science and Technology,2019,47(9):1-40.
[2]	LI Zhenlei,DOU Linming,CAI Wu,et al.Investigation and analysis of the rock burst mechanism induced within fault-pillars[J].International Journal of Rock Mechanics & Mining Sciences,2014,70:192-200.
[3]	姜耀东,潘一山,姜福兴,等.我国煤炭开采中的冲击地压机理和防治[J].煤炭学报,2014,39(2):205-213. JIANG Yaodong,PAN Yishan,JIANG Fuxing,et al.State of the art review on mechanism and prevention of coal bumps in China[J].Journal of China Coal Society,2014,39(2):205-213.
[4]	李利萍,李卫军,潘一山.冲击扰动对超低摩擦型冲击地压影响分析[J].岩石力学与工程学报,2019,38(1):111-120. LI Liping,LI Weijun,PAN Yishan.Influence of impact disturbance on anomalously low friction rock bursts[J].Chinese Journal of Rock Mechanics and Engineering,2019,38(1):111-120.
[5]	崔峰,杨彦斌,来兴平,等.基于微震监测关键层破断诱发冲击地压的物理相似材料模拟实验研究[J].岩石力学与工程学报,2019,38(4):803-814. CUI Feng,YANG Yanbin,LAI Xingping,et al.Similar material simulation experimental study on rockbursts induced by key stratum breaking based on microseismic monitoring[J].Chinese Journal of Rock Mechanics and Engineering,2019,38(4):803-814.
[6]	曲效成,姜福兴,于正兴,等.基于当量钻屑法的冲击地压监测预警技术研究及应用[J].岩石力学与工程学报,2011,30(11):2346-2351. QU Xiaocheng,JIANG Fuxing,YU Zhengxing,et al.Rockburst monitoring and precaution technology based on equivalent drilling research and its applications[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(11):2346-2351.
[7]	窦林名,何学秋,Bernard Drzezls.冲击矿压危险性评价的地音法[J].中国矿业大学学报,2000,29(1):85-88. DOU Linming,HE Xueqiu,Bernard Drzezls.AE method of evaluating the danger of rock burst[J].Journal of China University of Mining &Technology,2000,29(1):85-88.
[8]	王恩元,何学秋,聂百胜,等.电磁辐射法预测煤与瓦斯突出原理[J].中国矿业大学学报,2000,29(3):3-7. WANG Enyuan,HE Xueqiu,NIE Baisheng,et al.Principle of predicting coal and gas outburst using electromagnetic emission[J].Journal of China University of Mining &Technology,2000,29(3):3-7.
[9]	巩思园.矿震震动波波速层析成像原理及其预测煤矿冲击危险应用实践[D].徐州:中国矿业大学,2010. GONG Siyuan.Research and application of using mine tremor velocity tomography to forecast rockburst danger in coal mine[D].Xuzhou:China University of Mining and Technology,2010.
[10]	窦林名,蔡武,巩思园,等.冲击危险性动态预测的震动波CT技术研究[J].煤炭学报,2014,39(2):238-244. DOU Linming,CAI Wu,GONG Siyuan,et al.Dynamic risk assessment of rock burst based on the technology of seismic computed tomography detection[J].Journal of China Coal Society,2014,39(2):238-244.
[11]	窦林名,姜耀东,曹安业,等.煤矿冲击矿压动静载的"应力场-震动波场"监测预警技术[J].岩石力学与工程学报,2017,36(4):803-811. DOU Linming,JIANG Yaodong,CAO Anye,et al.Monitoring and pre-warning of rockburst hazard with technology of "stress field and wave field" in underground coalmines[J].Chinese Journal of Rock Mechanics and Engineering,2017,36(4):803-811.
[12]	程刚,梁开山,辛崇伟,等.基于震动波CT探测的冲击地压危险性分析及防治实践[J].煤炭工程,2020,52(1):64-69. CHENG Gang,LIANG Kaishan,XIN Chongwei,et al.Rockburst risk analysis and prevention practice based on vibration wave CT detection[J].Coal Engineering,2020,52(1):64-69.
[13]	曹安业,王常彬,窦林名,等.临近断层孤岛面开采动力显现机理与震动波CT动态预警[J].采矿与安全工程学报,2017,34(3):411-417. CAO Anye,WANG Changbin,DOU Linming,et al.Dynamic manifestation mechanism of mining on the island coalface along fault and dynamic pre-warning of seismic waves with seismic tomography[J].Journal of Mining & Safety Engineering,2017,34(3):411-417.
[14]	潘俊锋,毛德兵,蓝航,等.我国煤矿冲击地压防治技术研究现状及展望[J].煤炭科学技术,2013,41(6):21-25. PAN Junfeng,MAO Debing,LAN Hang,et al.Study status and prospects of mine pressure bumping control technology in China[J].Coal Science and Technology,2013,41(6):21-25.
[15]	沈威,窦林名,贺虎,等.实体煤掘进加卸载路径下的冲击机理及防控研究[J].采矿与安全工程学报,2019,36(4):768-776. SHEN Wei,DOU Linming,HE Hu,et al.Study on mechanism and prevention of rock burst under loading and unloading path in solid coal driving[J].Journal of Mining & Safety Engineering,2019,36(4):768-776.
[16]	GB/T 25217.10-2019冲击地压测定、监测与防治方法第10部分:煤层钻孔卸压防治方法[S]. GB/T 25217.10-2019 Methods for test,monitoring and prevention of rockburst-part 10:prevention method of drillhole destressing relief of coal seam[S].
[17]	GB/T 25217.11-2019冲击地压测定、监测与防治方法第11部分:煤层卸压爆破防治方法[S]. GB/T 25217.10-2019 Methods for test,monitoring and prevention of rockburst-part 11:prevention method of destress blasting in coal seam[S].
[18]	GB/T 25217.13-2019冲击地压测定、监测与防治方法第13部分:顶板深孔爆破防治方法[S]. GB/T 25217.10-2019 Methods for test,monitoring and prevention of rockburst-part 13:prevention method of deep-hole blasting in roof[S].