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International Journal of Mining Science and Technology 2024年第8期34卷 1095-1114页

作者： Jiaxin Zhuang zonglong mu Wu Cai Hu He Lee J.Hosking Guojun Xi Biao Jiao Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention Xuzhou 221116China School of Mines China University of Mining and TechnologyXuzhou 221116China State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources Xuzhou 221116China School of Resources and Geosciences China University of Mining and TechnologyXuzhou 221116China Department of Civil and Environmental Engineering Brunel University LondonUxbridgeMiddlesex UB83PHUK Shaanxi Binchang Hujiahe Mining Company Limited Xianyang 713602China

multistage hydraulic fracturing of horizontal wells(MFHW)is a promising technology for controlling coal burst caused by thick and hard roofs in ***,challenges remain regarding the MFHW control mechanism of coal burst and assessment of the associated fracturing *** this study,these challenges were investigated through numerical modelling and field applications,based on the actual operating parameters of MFHW for hard roofs in a Chinese coal mine.A damage parameter(D)is proposed to assess the degree of hydraulic fracturing in the *** mechanisms and effects of MFHW for controlling coal burst are analyzed using microseismic(MS)data and front-abutment stress *** show that the degree of fracturing can be categorized into lightly-fractured(D≤0.3),moderately fractured(0.3

关键词： Coal burst multistage hydraulic fracturing of horizontal wells Mining-induced seismicity Mining-induced stress Effectiveness evaluation

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多指标融合赋权综合预警的冲击危险评价方法

采矿与岩层控制工程学报 2024年第3期6卷 77-90页

作者：杨景牟宗龙李家卓刘广建尹子霆庄佳鑫安徽理工大学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 中国矿业大学江苏省矿山地震监测工程实验室江苏徐州221116 中国矿业大学矿业工程学院江苏徐州221116 安徽理工大学矿业工程学院安徽淮南232001 宁波大学岩石力学研究所浙江宁波315211

为了进一步丰富工作面冲击危险评价方法,完善冲击地压防治体系,结合理论分析与工程实践,建立了融合4项评价指标的冲击危险综合评价指数W,用于工作面开采期间的冲击危险评价,联合震源定位及波速层析成像技术实现了对各开采区域冲击危险... 详细信息

为了进一步丰富工作面冲击危险评价方法,完善冲击地压防治体系,结合理论分析与工程实践,建立了融合4项评价指标的冲击危险综合评价指数W,用于工作面开采期间的冲击危险评价,联合震源定位及波速层析成像技术实现了对各开采区域冲击危险的综合预警。研究结果表明:(1)地质条件复杂及不规则煤柱区域震源聚集,波速高值异常;(2)融合多指标赋权建立的冲击危险综合评价指数W与震源数量及能级成较好的耦合关系,能适用于工作面冲击危险评价;(3)综合震源定位、波速层析成像和多指标融合赋权的冲击危险评价方法,可实现对高应力集中区的识别、冲击危险区域的定位、冲击危险等级的判定和卸压效果的检测。研究结果可为煤矿动力灾害的防治提供参考。

关键词：冲击地压震源定位波速演化冲击危险评价方法

Dynamic failure risk of coal pillar formed by irregular shape longwall face:A case study

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International Journal of Mining Science and Technology 2018年第5期28卷 775-781页

作者： Yixin Zhao Hao Wang Shimin Liu zonglong mu Zhiguo Lu Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources School of Resources and Safety Engineering China University of Mining & Technology Department of Energy and Mineral Engineering G3 Center and EMS Energy Institute Pennsylvania State University University Park School of Mines China University of Mining & Technology

Irregular shape workface would result in the presence of coal pillar, which leads to high stress concentration and possibly induces coal bumps. In order to study the coal bump mechanism of pillars, static and dynamic stress overlapping(SDSO) method was proposed to explain the impacts of static stress concentration and tremors induced by mining activities. The stress and deformation in surrounding rock of mining face were analyzed based on the field case study at 1303 workface in Zhaolou Coal Mine in *** results illustrate that the surrounding rock of a workface could be divided into four different zones,i.e., residual stress zone, stress decrease zone, stress increase zone and original stress zone. The stress increase zone is prone to failure under the SDSO impact loading conditions and will provide elastic energy for inducing coal bump. Based on the numerical modelling results, the evolution of static stress in coal pillar as the size of gob increasing was studied, and the impact of dynamic stress was investigated through analyzing the characteristics of tremor activities. The numerical results demonstrate the peak value of vertical stress in coal pillar rises from about 30 MPa with mining distance 10 m to 52.6 MPa with mining distance 120 m, and the location of peak stress transfers to the inner zone of coal pillars as the workface moves forward. For the daily tremor activities, tremors with high energy released indicate high dynamic stress disturbance on the surrounding rock, therefore, the impact of dynamic stressing is more serious during workface extension period because the tremor frequency and average energy after workface extension are higher than those before the workface extension.

关键词： Coal bump Coal pillar Tremor Irregular shape longwall face Static and dynamic stress overlapping

Stress spatial evolution law and rockburst danger induced by coal mining in fault zone

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International Journal of Mining Science and Technology 2016年第3期26卷 409-415页

作者： Li Teng mu zonglong Liu Guangjian Du Junliu Lu Hao Key Laboratory of Deep Coal Resource Mining Ministry of Education of China School of Mines China University of Mining & Technology

In order to explore the influence of coal mining disturbance on the rockburst occurring in fault zone, this research constructed a mechanical model for the evolution of fault stress, and analyzed the influence of the ratio of horizontal stress to vertical stress on the stability of fault, and the spatial distribution of the stress in fault zone as well as its evolution rule. Furthermore, the rockburst danger at different spatial areas of fault zone was predicated. Results show that: when both sides of the working face are mined out, the fault zone in the working face presents greater horizontal and vertical stresses at its boundaries but exhibits smaller stresses in its middle section; however, the ratio of horizontal stress to vertical stress is found to be greater at middle section and smaller at boundaries. As the working face advances towards the fault, the horizontal and vertical stresses of the fault firstly increases and then decreases; conversely,the ratio of horizontal stress to vertical stress keeps decreasing all the time. Therefore, if the fault zones are closer to the goaf and the coal wall, the stress ratio will be smaller, and the fault slip will be more prone to occur, therefore rockburst danger will be greater. This research results provide guidance for the rockburst prevention and hazard control of the coal mining in fault zone.

关键词： Rockburst Fault Spatial distribution of stress Mining-induced seismicity

F-structure model of overlying strata for dynamic disaster prevention in coal mine

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International Journal of Mining Science and Technology 2013年第4期23卷 508-514页

作者： mu zonglong Dou Linming He Hu Fan Jun School of Mines China University of Mining & Technology State Key Laboratory of Coal Resources and Mine Safety China University of Mining & Technology School of Resource and Earth Science China University of Mining & Technology

The rupture and movement scope of overlying strata upon the longwall mining face increased sharply as the exploitation scale and degree growing recently,and the spatial structure formed by fractured strata became much more *** overlying strata above the working face and adjacent gobs would affect each other and move cooperatively because small pillar can hardly separate the connection of overlying strata between two workfaces,which leads to mining seismicity in the gob and induces rockburst disaster that named spatial structure instability rockburst in this *** on the key stratum theory,the F-structure model was established to describe the overlying strata characteristic and rockburst mechanism of workface with one side of gob and the other side un-mined solid coal *** results show that F-structure in the gob will re-active and loss stability under the influence of neighboring mining,and fracture and shear slipping in the process of instability is the mechanism of the seismicity in the *** F-structure was divided into two categories that short-arm F and long-arm F structure based on the state of strata above the *** studied the underground pressure rules of different F-structure and instability mechanism,thus provide the guide for prevention and control of the F-structure spatial instability *** micro-seismic system is used for on-site monitoring and researching the distribution rules of seismic events,the results confrmed the existence and correct of F-spatial *** last specialized methods for prevention seismicity and rockburst induced by F-structure instability are proposed and applied in Huating Coal Mine.

关键词： Overlying strata Spatial structure Dynamic disaster Key strata Seismicity

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工作面单双巷顶板爆破应力演化规律研究

煤炭工程 2024年第2期56卷 114-121页

作者：牟宗龙张泽辉张修峰盖元庄佳鑫史毛宁董晓勇中国矿业大学江苏省矿山地震监测工程实验室江苏徐州221116 中国矿业大学矿业工程学院江苏徐州221116 山东能源集团有限公司山东济南250101 枣庄矿业(集团)有限责任公司田陈煤矿山东枣庄277500

坚硬顶板是影响工作面冲击危险的重要因素,实践中常采用爆破技术对工作面顶板进行预裂和卸压。以田陈煤矿3煤层上方存在坚硬顶板的7202工作面为对象,采用理论分析、数值模拟、工业试验等方法,研究了不同爆破高度、工作面单巷和双巷顶板... 详细信息

坚硬顶板是影响工作面冲击危险的重要因素,实践中常采用爆破技术对工作面顶板进行预裂和卸压。以田陈煤矿3煤层上方存在坚硬顶板的7202工作面为对象,采用理论分析、数值模拟、工业试验等方法,研究了不同爆破高度、工作面单巷和双巷顶板爆破下围岩应力演化及微震规律。结果表明:针对低位亚关键层采用单巷和双巷爆破时,爆破高度越大,巷道围岩峰值应力越低,卸压效果与爆破高度呈正相关关系;但采用双巷爆破时,当爆破高度增加至6倍采高(亚关键层中部位置)以上时,工作面中部区域会出现应力升高现象,且工作面越短应力升高越明显;在7202工作面初采阶段进行高度为3倍采高的单巷顶板爆破时,微震多集中在巷道区域,卸压效果一般,改为双巷顶板爆破并提高爆破高度至6倍采高后,微震多集中到工作面中部区域,无大能量微震事件发生,应力监测预警次数也大幅降低,巷道区域卸压效果较好。

关键词：冲击地压坚硬顶板单双巷顶板爆破爆破高度应力演化

Research progress of monitoring, forecasting, and prevention of rockburst in underground coal mining in China

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International Journal of Coal Science & Technology 2014年第3期1卷 278-288页

作者： Linming Dou zonglong mu Zhenlei Li Anye Cao Siyuan Gong State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116China School of Mines China University of Mining and TechnologyXuzhou 221116China

As one of the dynamic disasters of coal mines,rockburst seriously affects underground safe coal *** on the laboratory test,field test,and theoretical analysis,this study proposed the principle of the rock burst induced by the combination of dynamic and static stresses and divided such rock burst into three types,including induced by primary dynamic stress,mainly induced by dynamic stress,and by dynamic stress in low critical stress *** expressions of the static stress induced by coal mining and dynamic stress induced by mining tremors were ***,theories and technologies at home and abroad were summarized concerning the monitoring,forecasting,and preventing of *** mainly include the zoning and leveling forecasting method,electromagnetic radiation technology,elastic wave and seismic wave computed tomography technologies in aspect of rockburst monitoring,as well as the intensity weakening theory,the strong-soft-strong structure effect,the directional hydraulic fracturing technology,the roadway support system in regards of rockburst *** prospect of rockburst development suggested that researches concerning the rockburst mechanism should be quantitatively developed around the roadway and coalface surrounding coal-rock *** should be focused on the rockburst mechanism and prevention technology of mining with over 1,000 km deep and mining in large tectonic *** addition,the monitoring and prevention of rockburst should be based on rockburst mechanism.

关键词： Rockburst Dynamic stress Static stress Mining tremor Monitoring and forecasting Prevention

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济三煤矿深部采区冲击矿压综合治理技术

中国煤炭 2011年第1期37卷 96-98页

作者：吕建为牟宗龙兖矿集团公司生产技术部山东省邹城市273502 兖矿集团有限公司博士后工作站山东省邹城市273503 中国矿业大学煤炭资源与安全开采国家重点实验室江苏省徐州市221116

根据济三煤矿地质条件和开采技术条件,分析确定深部六采区6303工作面具有中等冲击危险性,冲击危险指数为0.63。针对此,在6303工作面开采期间采取了煤体大直径钻孔卸压、煤体爆破卸压和顶板预裂爆破等几项技术措施,并配合采用钻屑法、电... 详细信息

根据济三煤矿地质条件和开采技术条件,分析确定深部六采区6303工作面具有中等冲击危险性,冲击危险指数为0.63。针对此,在6303工作面开采期间采取了煤体大直径钻孔卸压、煤体爆破卸压和顶板预裂爆破等几项技术措施,并配合采用钻屑法、电磁辐射法和钻孔窥视仪检测法对治理效果进行了检验,结果表明,几项技术措施的实施降低了煤体和顶板的冲击危险性。

关键词：冲击矿压影响因素坚硬顶板济三煤矿

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提高煤矿微震定位精度的台网优化布置算法

岩石力学与工程学报 2012年第1期31卷 8-17页

作者：巩思园窦林名马小平牟宗龙陆菜平中国矿业大学信息与电气工程学院江苏徐州221116 中国矿业大学煤炭资源与安全开采国家重点实验室江苏徐州221116 中国矿业大学矿业工程学院江苏徐州221116

针对大规模台网布置组合优化问题,建立台网优化布置目标函数,提出包括模型数据准备模块、遗传算法求解模块和台网布置方案定位能力评价模块的微震台网布置方案求解模型。模型数据准备模块中,首先根据综合指数法和台站候选点确定原则为... 详细信息

针对大规模台网布置组合优化问题,建立台网优化布置目标函数,提出包括模型数据准备模块、遗传算法求解模块和台网布置方案定位能力评价模块的微震台网布置方案求解模型。模型数据准备模块中,首先根据综合指数法和台站候选点确定原则为遗传算法求解模型提供初始参数,然后由评价模块对求解的最优方案进行定位能力评价。遗传算法求解模块中采用入选候选点在前,落选候选点在后的台网布置方案自然数编码个体表达形式,结合创建的用于保证监测小能量震动的惩罚函数,构建台网布置方案个体的适应度函数。为防止算法过早收敛,使用混合交叉和变异操作算子,规定交叉和变异范围必须包括入选候选点,以提高算法效率。试验和现场应用结果表明,该算法能够快速找到最优解,且计算时间不随组合方案规模的增加而显著增加。数值评价技术可验证采用该算法求解的台网布置方案较优,显著降低重点监测区域内的震源定位误差,其最大值降幅达230 m。

关键词：采矿工程微震台网布置遗传算法自然数编码惩罚函数适应度函数

矿震扰动下采区煤柱应力偏量集中区诱冲机制及防治方法

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中国矿业大学学报 2017年第6期46卷 1202-1210页

作者：王浩赵毅鑫牟宗龙焦振华张旭卢志国中国矿业大学(北京)资源与安全工程学院北京100083 中国矿业大学(北京)煤炭资源与安全开采国家重点实验室北京100083 中国矿业大学矿业工程学院江苏徐州221116

以张双楼矿西一采区生产地质条件为工程背景,基于应力偏量、等效应力、Mises强度准则、能量释放速率分析了煤岩冲击失稳的充要判别准则,揭示了采区煤柱覆岩结构、应力偏量、矿震事件随工作面回采演化规律,并探讨了矿震扰动下采区煤柱冲... 详细信息

以张双楼矿西一采区生产地质条件为工程背景,基于应力偏量、等效应力、Mises强度准则、能量释放速率分析了煤岩冲击失稳的充要判别准则,揭示了采区煤柱覆岩结构、应力偏量、矿震事件随工作面回采演化规律,并探讨了矿震扰动下采区煤柱冲击危险防治方法.结果表明:煤岩冲击失稳充要条件为开采活动及矿震扰动引起的应力偏量超过煤岩体强度极限,且单位时间内煤岩系统释放弹性能量与矿震应力波输入能量之和大于煤岩系统稳态破坏消耗能量;随着采区工作面持续开采,采区煤柱两侧覆岩形成"T"型悬臂结构并不断损伤破坏;以标量应力偏量第二不变量J2表征应力偏量σ′_(ij),煤柱区应力偏量前期呈"M"型分布并逐渐向单峰型转变,屈服破坏区逐渐向煤柱中部扩展;以矿震频次、能量、震源位置表征应力波扰动σ_(ij)~d,矿震扰动以低能量事件为主,且主要集中于正回采工作面及采区煤柱区域.根据分析结果,提出矿震扰动下采区煤柱切顶爆破、扩大采区煤柱宽度、跨上山开采、大直径钻孔卸压等防冲方法.

关键词：采区煤柱冲击地压矿震应力偏量覆岩结构