巨厚岩浆岩失稳的大孤岛工作面防冲研究

发布时间：2018-06-27 05:04

本文选题：采矿工程 + 巨厚岩浆岩　；参考：《岩石力学与工程学报》2017年S1期

【摘要】：巨厚岩浆岩失稳导致的冲击地压灾害严重威胁着煤矿的安全生产。以王楼煤矿巨厚岩浆岩下孤岛工作面开采为工程背景,采用理论分析、数值模拟和现场实测等方法研究巨厚岩浆岩失稳的孤岛工作面防冲,得出如下主要结论:(1)巨厚岩浆岩失稳导致的孤岛工作面冲击地压类型为自发型和诱发型,自发型冲击机制为巨厚岩浆岩失稳导致自身及其上覆载荷层重力向下传递,使得被影响区域煤岩应力逐渐集聚到冲击的应力水平,诱发型冲击机制为巨厚岩浆岩断裂强动载使得被影响区域煤岩应力突跃至冲击的应力水平;(2)提出巨厚岩浆岩失稳的孤岛工作面整体失稳冲击判断准则,根据准则将王楼煤矿12310孤岛工作面设计成大宽度孤岛工作面开采可使其由整体失稳冲击向局部冲击转化,并得到了现场验证;(3)针对巨厚岩浆岩失稳时大孤岛工作面局部冲击类型提出了保持低应力的防治措施,微震、应力监测结果验证了措施的有效性。研究成果为巨厚坚硬岩层下工作面冲击地压灾害的防治提供了一种新方法。
[Abstract]:The shock and ground pressure disaster caused by the instability of giant magmatic rocks seriously threatens the safety production of the coal mine. Taking the mining of the isolated island working face under the giant thick magmatic rock in Wang Lou coal mine as the engineering background, the method of theoretical analysis, numerical simulation and field measurement is used to study the isolated island working face of the giant magmatic rock, and the following main conclusions are drawn: (1) Ju Houyan The type of rock burst caused by the instability of the slurry rock is self hairstyle and inducement, and the self hairstyle impact mechanism is that the instability of the thick magmatic rock leads to the downward transfer of the gravity of its own and its overburden layer, and the stress level of the coal and rock in the affected area is gradually gathered to the stress level of the impact, and the lure impact mechanism is the strong movement of the giant magmatic rock fracture. The stress level of the coal and rock stress of the affected area is leaped to the impact, and (2) the judgment criterion of the overall instability impact of the isolated island working face of the huge thick magmatic rock is proposed. According to the criterion, the mining face of the 12310 isolated island of Wang Lou coal mine is designed to be exploited by the impact of the whole body instability impact to the local impact. Field verification; (3) in view of the local impact type of the big island magmatic rock during the instability of the big magmatic rock, the prevention and control measures to maintain the low stress are put forward, and the results of micro earthquake and stress monitoring verify the effectiveness of the measures. The research results provide a new method for the prevention and control of the rockburst in the working face under the thick and hard rock.
【作者单位】：中原工学院建筑工程学院;北京科技大学土木与环境工程学院;北京联合大学北京市信息服务工程重点实验室;山东能源集团有限公司;
【基金】：国家自然科学基金资助项目(51274022)~~
【分类号】：TD324

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