Numerical simulation of rock-burst relief and prevention by water-jet cutting
Numerical simulation of rock-burst relief and prevention by water-jet cutting
复制标题
水射流切割岩爆救援与防治数值模拟
DOI：
10.1016/j.ijrmms.2014.05.015
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发表时间：
2014-09-01
影响因子：
7.2
通讯作者：
Shen, Rongxi
中科院分区：
文献类型：
--
作者：
Song, Dazhao;Wang, Enyuan;Shen, Rongxi
水射流切割技术在煤矿冲击地压防治中的应用进展缓慢。分析了WJCT在冲击地压防治中应用的可行性和合理性，利用ABAQUS软件模拟了硬煤巷道围岩所受应力场和能量场的分布特征，以及这些场与巷道围岩失稳的内在联系，并进行了现场MJCT。测试使用电磁辐射(EMR)测量技术。结果表明，WJCT通过在切槽附近的煤体中诱导应力释放和能量耗散来有效地卸压冲击地压，其环形槽还可以通过阻断或削弱煤体中的应力和能量传递来降低冲击地压的危险性。水平径向槽和环形垂直槽分别形成“梁状结构”、“小煤柱骨架”和“层状储能结构”，导致槽周煤质应力集中和能量积累增加。合理地设计和优化槽位及其组合，不仅可以显著减小应力集中和能量积累的范围，而且可以在更大范围内破坏煤体结构，迫使应力向更深的煤体传递，最终避免高强度和大范围的冲击地压。WJC现场EMR泄压试验验证了上述结论。(C)2014爱思唯尔有限公司。保留所有权利。
The applications in coal mine rock burst prevention using water jet cutting technology (WJCT) have progressed slowly. In this paper we analyzed the possibility and reasonableness of WJCT application to rock burst relief and prevention, used the ABAQUS software to simulate the distributive characteristics of stress and energy fields suffered by hard coal roadway wallrock and the internal relationships of the fields to the instability due to WJC on roadway wallrock, and conducted field MJCT. tests using electromagnetic radiation (EMR) measurement technology. The results showed that WJCT can unload rock burst effectively by inducing stress release and energy dissipation in coal mass near its cut slots; its annular slots also can decrease rock burst risks through blocking or weakening stress and energy transfer in coal mass. The horizontal radial slots and annular vertical slots may cause "the beam structure" and "the small pillar skeleton", and "the layered energy reservoir structure", respectively, which lead to an increase in stress concentration and energy accumulation in coal element mass near the slots. The reasonable design and optimization of slots positions and their combination not only can significantly reduce the scope of stress concentration and energy accumulation, but also can destroy coal mass structure on a larger scale to force stress to transfer deeper coal mass, eventually avoiding high intensity and large-scale rock bursts. The field tests of WJC for pressure relief using EMR verified the above conclusions. (c) 2014 Elsevier Ltd. All rights reserved.