摘要
田陈煤矿7122工作面受到断层等地质构造影响,开采过程中经过调斜、缩面,工作面呈不规则形状,冲击危险性较高。分析了工作面主要冲击危险因素,划分了冲击危险区域,对各危险区域制定了大直径钻孔卸压、扇形深孔爆破切顶、顶板深孔爆破切顶等针对性卸压措施。回采过程中,通过微震监测对工作面回采期间的卸压效果进行检验,微震能量与频次在实施卸压措施后显著降低。结果表明,各项卸压措施有效降低了矿震强度与冲击危险性,为工作面的安全生产提供了保证。该工作面的冲击地压防治技术对类似工作面的安全开采具有借鉴意义。
The 7122 working face of Tianchen Coal Mine was affected by geological structures such as faults.During the mining process,after adjustment and face reduction,the working face was irregular in shape and had a high impact risk.The main impact risk factors of the working face were analyzed,the impact danger area was divided,and targeted pressure relief measures such as large-diameter drilling pressure relief,fan-shaped deep hole blasting and roof cutting,and roof deep hole blasting are formulated for each dangerous area.During the mining process,the pressure relief effect of the working face during the mining period was tested through microseismic monitoring,and the microseismic energy and frequency were significantly reduced after the implementation of pressure relief measures.The results showed that the various pressure relief measures effectively reduced the mine earthquake intensity and impact risk,and provided a guarantee for the safe production of the working face.The rockburst prevention technology of this working face had reference significance for the safe mining of similar working faces.
作者
陈庆国
尹子霆
牟宗龙
焦建行
王占硕
李忠孝
刘广建
CHEN Qing-guo;Yin Zi-ting;MOU Zong-long;JIAO Jian-xing;WANG Zhan-shuo;LI Zhong-xiao;LIU Guang-jian(Tianchen Coal Mine,Zaozhuang Mining(Group)Co.,Ltd.,Zaozhuang 277100,China;Jiangsu Mine Earthquake Monitoring Engineering Laboratory,Xuzhou 221116,China;School of Mining Engineering,China University of Mining and Technology,Xuzhou 221116,China;Zhejiang Key Laboratory of Rock Mechanics and Geological Hazards,Shaoxing University of Arts and Sciences,Shaoxing 312000,China)
出处
《煤炭科技》
2022年第3期83-89,共7页
Coal Science & Technology Magazine
基金
国家自然科学基金资助项目(51974302,42107177,51934007,51874292)。
关键词
复杂地质工作面
冲击影响因素
冲击地压防治
irregular working face
impact factors
rock burst prevention and control
