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Rock burst risk evaluation based on equivalent surrounding rock strength

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International Journal of Mining Science and Technology 2019年第4期29卷 571-576页

作者： Jinglin Wen Husheng Li fuxing jiang Zhengxing Yu Haitao Ma Xiaolin Yang China Academy of Safety Science and Technology Beijing 100012China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China

On-site investigations consistently show that the rock burst inherent to coal seams varies greatly with coal seam *** this study,impact factors related to coal seam thickness and surrounding rock strength were analyzed and a corresponding rock burst risk assessment method was *** model reflects the influence of coal seam thickness on the stress distribution of surrounding rock at the *** on the roadway excavation range,a stress distribution model of surrounding roadway rock is established and the influence of coal seam thickness on rock burst risk is analyzed *** proposed rock burst risk assessment method is based on the equivalent surrounding rock strength and coal seam bursting *** proposed method was tested in a 3500 mining area to find that it yields rock burst risk assessment results as per coal seam thickness that are in accordance with real-world *** results presented here suggest that coal seam thickness is a crucial factor in effective rock burst risk assessment.

关键词： Mining engineering Coal seam thickness Rock burst risk Equivalent surrounding rock strength Bursting liability

Width design for gobs and isolated coal pillars based on overall burst-instability prevention in coal mines

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Journal of Rock Mechanics and Geotechnical Engineering 2016年第4期8卷 551-558页

作者： Junfei Zhang fuxing jiang Sitao Zhu Lei Zhang School of Civil and Environmental Engineering University of Science and Technology Beijing

This paper presents a study on the valorization of local materials such as desert dune sand obtained from Laghouat region in the South Algeria and mine bentonite intended for the realization of liner base layers in the conception of insulation barriers for hazardous waste facilities. In practice, an economical mixture satisfying the hydraulic requirements is generally concerned. First, in order to get an adequate dune sand ebentonite mixture compacted to the optimum Proctor condition, an investigation on saturated hydraulic behavior is carried out in this study for different mixtures. Using oedometer test（indirect measurement）, the adequate mixture of 85% dune sand and 15% bentonite satisfies the conditions of saturated hydraulic conductivity（k 〈 10^（-9）m/s）. This result of the adequate mixture is also confirmed by direct measurement of saturated hydraulic conductivity using triaxial cell. Second, the unsaturated hydraulic conductivity of the adequate mixture is measured with an original vapor equilibrium technique（VET） used for S r〈 30%（very high suction s 〉 3 MPa）. This technique is conducted based on the exploitation of the water retention curve in order to establish the relationships between hydraulic conductivity, degree of saturation, and suction. It shows that the hydraulic conductivity increases with the degree of saturation and decreases with the suction. However, the hydraulic conductivity has a constant value for suctions larger than 20 MPa. The selected dune sandebentonite mixture satisfies the regulation requirements and hence constitutes a good local and economical material for the conception of barrier base liners.

关键词： Dune sand Bentonite Valorization Landfill liners Hydraulic conductivity

The decomposition rates of dead plant materials of two species of Spartina and the changes in their nutritive components

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Acta Oceanologica Sinica 1988年第1期7卷 119-125页

作者： jiang fuxing, Wang Weizhong, Zhao Ming and Zhong Chongxin China

-The detritus from the decomposition of dead plant materials of Spartina with great biomass provides abundant food for the heterotrophs in estuarine and nearshore coastal waters. It is for this reason that the decomposition rates of S. anglica and S. alterniflora near the estuary of obsolete Huanghe River were studied. The changes in nutritive components during decomposition are also *** showed that the decomposition rate of dead leaves of S. anglica on ultra-low marsh was about 90% for the first year. In the eighth month, it was 80% and 76 % respectively for S. anglica and S. alterniflora on low marsh. Protein content of the two species of Spartina increased in the course of decomposition, with a maximum increment of 100% or more. The energy value also increased, whereas cellulose content decreased markedly. The percentage content of ash and lipid varied significantly with zonal differences.

关键词： rate The decomposition rates of dead plant materials of two species of Spartina and the changes in their nutritive components

Investigation of stability of a tunnel in a deep coal mine in China

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International Journal of Mining Science and Technology 2013年第4期23卷 567-577页

作者： Kulatilake P.H.S.W. Wu Qiong Yu Zhengxing jiang fuxing Geological Engineering Program Department of Materials Science & Engineering University of Arizona Faculty of Engineering China University of Geosciences China Academy of Safety Science and Technology School of Civil and Environmental Engineering University of Science and Technology Beijing

Stability level of tunnels that exist in an underground mine has a great influence on the safety,production and economic performance of *** of stability for soft-rock tunnels is an important task for deep coal mines located in high in situ stress *** the available information on stratigraphy,geological structures,in situ stress measurements and geo-mechanical properties of intact rock and discontinuity interfaces,a three-dimensional numerical model was built by using 3DEC software to simulate the stress conditions around a tunnel located under high in situ stress conditions in a coal rock mass in *** were conducted for several tunnel shapes and rock support *** obtained for the distribution of failure zones,and stress and displacement felds around the tunnel were compared to select the best tunnel shape and support pattern to achieve the optimum stability conditions.

关键词： Coal mine Tunnel stability High in situ stress Numerical modeling 3DEC

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采场回采前冲击危险性动态评估方法研究

岩石力学与工程学报 2014年第10期33卷 2101-2106页

作者：姜福兴冯宇刘晔北京科技大学土木与环境工程学院北京100083

大量的现场观测表明,掘进期间应力异常的地段,回采期间也是冲击地压高发区。因此,提出通过采用微震、地音和应力监测系统对掘进期间的震动和应力动态信息进行监测,从而划定冲击危险区和危险程度的动态评估方法。利用掘进期间揭露的静态... 详细信息

大量的现场观测表明,掘进期间应力异常的地段,回采期间也是冲击地压高发区。因此,提出通过采用微震、地音和应力监测系统对掘进期间的震动和应力动态信息进行监测,从而划定冲击危险区和危险程度的动态评估方法。利用掘进期间揭露的静态地质资料完善勘探资料,对回采工作面冲击危险性进行静态评价,进而构建动态与静态联合评价的方法。该评价方法结合掘进期间的动静态信息,克服传统静态评价方法因评价资料不完善而导致的评价结果不够准确的局限性,为采场回采前冲击危险区的治理提供更加准确的依据,具有较好的应用价值。

关键词：采矿工程冲击地压动态评估静态评价微震地音应力监测

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煤矿冲击地压防治体系中的关键问题探讨

煤炭科学技术 2023年第1期51卷 203-213页

作者：姜福兴张翔朱斯陶北京科技大学土木与资源工程学院北京100083 山东能源集团有限公司山东济南250014

针对我国煤矿冲击地压的防治现状,对煤矿冲击地压防治体系中的几个关键问题进行了探讨,得到以下主要结论:从灾害控制的角度界定了冲击地压与矿震及其相互关系,通过主导力源与煤层-围岩结构的分类组合,提出了32类冲击地压和5类矿震的分类... 详细信息

针对我国煤矿冲击地压的防治现状,对煤矿冲击地压防治体系中的几个关键问题进行了探讨,得到以下主要结论:从灾害控制的角度界定了冲击地压与矿震及其相互关系,通过主导力源与煤层-围岩结构的分类组合,提出了32类冲击地压和5类矿震的分类,明确了冲击地压以消除灾害为治理目标,而矿震则需要根据致灾程度分级治理;提出并量化了基础应力影响指数、附加应力影响指数、冲击倾向性影响指数和支护强度影响指数4项冲击危险性评价指标,设计了包含应力条件、冲击倾向性条件和支护条件的冲击危险性多参量耦合评价方法;探讨了震动场、应力场和位移场3级冲击危险监测预警机理,提出了单参量特殊预警与多参量常规预警相结合的预警机制,设计了掘进影响区、回采影响区和不受采掘影响区的分区联合监测方法;根据多元评价指标中降低各因素冲击危险性的要求,提出了“低应力”“低扰动”“低倾向”“强支护”的冲击地压防治路线,设计了基于应力和围岩结构分类的局部卸压和解危措施的组合技术;针对矿震诱发井下冲击地压和地面震动损害的动力灾害,将此类灾害的治理等级划分为预防治理、对症治理和源头治理3级,设计了源头减震、分类治灾、卸压抗震的多级防控技术体系。

关键词：冲击地压矿震评价方法监测预警卸压解危

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综采放顶煤支架受力与顶板结构的关系探讨

岩石力学与工程学报 1999年第3期18卷 287-290页

作者：杨淑华姜福兴山东矿业学院矿压研究所泰安271019

在现场观测和动力学分析的基础上，研究了综放采场支架载荷有时比分层开采大而有时小的力学机理，提出了综放采场的两种典型顶板结构以及它们的静力和动力学特征，本文结论对综放支架的设计和选型有实际的指导意义。

关键词：综采放顶煤矿山压力顶板结构支架设计

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三峡库区千将坪滑坡地质力学模型试验研究

岩石力学与工程学报 2010年第5期29卷 1023-1030页

作者：肖诗荣刘德富姜福兴姜小兰三峡大学三峡库区地质灾害教育部重点实验室湖北宜昌443002 北京科技大学土木与环境工程学院北京100083 长江科学院湖北武汉430010

通过以微震和百分表位移为主要试验量测手段的地质力学模型试验,对三峡库区千将坪滑坡进行滑坡机制和利用微地震监测预报预警岩质滑坡的可行性研究。试验结果表明,蓄水前的强降雨对滑坡稳定性影响微弱或基本无影响,水库蓄水引起的浮托... 详细信息

通过以微震和百分表位移为主要试验量测手段的地质力学模型试验,对三峡库区千将坪滑坡进行滑坡机制和利用微地震监测预报预警岩质滑坡的可行性研究。试验结果表明,蓄水前的强降雨对滑坡稳定性影响微弱或基本无影响,水库蓄水引起的浮托力作用仅使滑坡产生蠕滑变形,滑带被水浸泡弱化强度降低是滑坡真正的致滑原因。试验记录的微震事件较清晰地反映滑坡变形破裂破坏过程,并揭示滑带破裂贯通总体上具有自滑坡前缘逐步向滑坡中部发展的规律,从试验角度论证利用微地震监测预报预警岩质滑坡的可行性。

关键词：边坡工程千将坪滑坡地质力学模型试验微震水库蓄水滑坡机制

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巨厚岩层采场关键工作面防冲-减震设计

中南大学学报（自然科学版） 2018年第2期49卷 439-447页

作者：张明姜福兴李克庆安徽理工大学省部共建深部煤矿采动响应与灾害防控国家重点实验室安徽淮南232001 北京科技大学土木与资源工程学院北京100083

为避免巨厚岩层运动诱发井下冲击和造成地面建(构)筑物震动损害,以山东某巨厚岩层矿井为研究背景,采用现场监测、理论分析和工程实践等手段,探讨兼顾地面建(构)筑物减震和井下防冲的关键工作面设计方法。研究结果表明:孤岛工作面两侧的... 详细信息

为避免巨厚岩层运动诱发井下冲击和造成地面建(构)筑物震动损害,以山东某巨厚岩层矿井为研究背景,采用现场监测、理论分析和工程实践等手段,探讨兼顾地面建(构)筑物减震和井下防冲的关键工作面设计方法。研究结果表明:孤岛工作面两侧的采动程度不同,非充分采动区上覆高位悬顶巨厚砾岩及其底部孤岛煤岩柱形成不对称"Γ"型覆岩空间结构;巨厚岩层开采条件下存在一个关键工作面,以工作面整体稳定性和矿震引起地面建(构)筑物的震动损害作为主要评估指标可确定关键工作面及其防冲-减震开采优化方法;在开采设计中采用上述方法可最终确定合理的开采方案,并取得较好的实践效果。

关键词：巨厚岩层矿震冲击地压关键工作面优化设计