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不同轴重下双线重载铁路隧道基底结构动压力分布研究 被引量:1
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作者 于丽 赵勇 +1 位作者 王明年 李自强 《铁道学报》 EI CAS CSCD 北大核心 2020年第4期115-122,共8页
以重载铁路张唐线付营子隧道为工程依托,针对Ⅳ级围岩条件下双线重载铁路隧道在25、27、30 t三种轴重下的基底结构不同结构层表面的动压力分布及竖向传递规律,开展了现场大型激振试验和实时远程监测。根据激振试验所得土压力传感器典型... 以重载铁路张唐线付营子隧道为工程依托,针对Ⅳ级围岩条件下双线重载铁路隧道在25、27、30 t三种轴重下的基底结构不同结构层表面的动压力分布及竖向传递规律,开展了现场大型激振试验和实时远程监测。根据激振试验所得土压力传感器典型时程曲线,得到了各结构面动压力的横向分布及竖向传递规律,最后根据远程监测数据对27 t轴重下基底结构的动压力分布规律进行对比验证。结果表明:Ⅳ级围岩条件下,双线重载铁路隧道重载线路在重载列车荷载直接作用下,该侧的动压力均大于普通铁路,各结构面不同测点的动压力数值随着与激振点水平距离的增加而降低,列车轴重提升使线路下方作用荷载的增大,双线铁路隧道基底结构易出现失稳。动压力竖向传递规律显示,各结构面表面接触压力对列车轴重的响应由上至下逐渐减弱。远程实测数据分析结果与激振试验结果比较接近,表明试验结果可用于双线重载铁路隧道基底结构设计参考。 展开更多
关键词 重载铁路隧道 基底结构 不同轴重 激振试验 动压力分布
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随动压力分布下的非球面抛光去除函数 被引量:3
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作者 李徐钰 魏朝阳 +1 位作者 徐文东 邵建达 《光学精密工程》 EI CAS CSCD 北大核心 2016年第12期3061-3067,共7页
考虑去除函数对数控小工具抛光光学元件精度的影响,提出了如何根据需要加工的非球面参数以及抛光盘参数得到最优去除函数的方法。由于计算非球面上去除函数的核心是准确获得抛光盘与镜面间的动态压力分布,本文提出利用有限元法仿真抛光... 考虑去除函数对数控小工具抛光光学元件精度的影响,提出了如何根据需要加工的非球面参数以及抛光盘参数得到最优去除函数的方法。由于计算非球面上去除函数的核心是准确获得抛光盘与镜面间的动态压力分布,本文提出利用有限元法仿真抛光盘与非球面间的压力分布,并结合经典Preston方程与行星运动模型来得到非球面不同位置处的去除函数。基于随动压力分布模型,分析了沥青盘抛光非球面时在不同抛光位置处去除函数的变化。在曲率半径为1 000mm的球面上进行了去除函数验证实验。结果表明:基于本文理论得到的去除函线型更接近实际情况,皮尔逊系数达到了0.977。本文提出的方法可以方便地调整加工位置来得到相应的压力分布,实现去除函数的优化,对提高加工效率与精度有实际指导意义。 展开更多
关键词 非球面抛光 动压力分布 变曲率去除函数 有限元法
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串列双方柱绕流的脉动压力分布与气动力研究 被引量:8
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作者 杨群 赵会涛 +1 位作者 刘小兵 刘庆宽 《建筑结构》 CSCD 北大核心 2020年第1期140-144,共13页
通过刚性模型测压风洞试验对串列双方柱在16个不同间距时的绕流进行了详细研究。双方柱的中心距L与单个方柱横断面的边长D之比L/D的变化范围为1.2~12.0。试验结果发现,串列双方柱的临界间距范围为3.5≤(L/D)cr≤4.0。在临界间距范围内,... 通过刚性模型测压风洞试验对串列双方柱在16个不同间距时的绕流进行了详细研究。双方柱的中心距L与单个方柱横断面的边长D之比L/D的变化范围为1.2~12.0。试验结果发现,串列双方柱的临界间距范围为3.5≤(L/D)cr≤4.0。在临界间距范围内,串列双方柱的绕流具有双稳态特征,同一间距下,上下游方柱均会出现两组明显不同的压力分布与气动力。通过引入干扰因子,定量地讨论了串列双方柱的脉动压力分布、脉动阻力和脉动升力随L/D的变化规律。 展开更多
关键词 串列双方柱 动压力分布 阻力 升力 风洞试验
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泵喷分布式脉动压力激励下泵喷艇体耦合系统振动声辐射 被引量:4
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作者 黄修长 苏智伟 +2 位作者 师帅康 饶志强 华宏星 《振动与冲击》 EI CSCD 北大核心 2021年第18期1-9,共9页
针对suboff艇后泵喷推进器分布式脉动压力激励下的泵喷-轴系-艇体耦合系统振动声辐射响应计算和特性分析开展研究。建立计算流体动力学(computational fluid dynamics,CFD)模型利用剪切应力输运(shear stress transfer,SST)k-ω模型进行... 针对suboff艇后泵喷推进器分布式脉动压力激励下的泵喷-轴系-艇体耦合系统振动声辐射响应计算和特性分析开展研究。建立计算流体动力学(computational fluid dynamics,CFD)模型利用剪切应力输运(shear stress transfer,SST)k-ω模型进行suboff艇后泵喷推进器表面脉动压力的计算,利用耦合有限元法(finite element method,FEM)建立泵喷-轴系-艇体耦合系统动力学模型,结合自编径向基函数插值程序获得表面脉动压力在泵喷结构湿表面的空间分布,利用边界元法(boundary element method,BEM)计算泵喷-轴系-艇体耦合系统的声辐射特性。对泵喷-轴系-艇体的耦合模态特性、传递力、辐射声功率和指向性等开展分析。结果表明:声辐射以转子表面脉动压力的贡献为主;二阶轴频以上,纵向脉动压力的贡献占优;泵喷激励下,振动声辐射主要特征频率包括激励力特征线谱、艇体的纵振模态、转子同相振动模态(呼吸模态)、转子-轴系一阶纵振模态等;导管和定子脉动压力激励下振动声辐射响应峰值出现在叶频(blade passing frequency,BPF)和2倍叶频处,量级和转子表面脉动压力激励处于同一量级,但其和转子表面脉动压力共同作用时,由于相位相互抵消,响应幅值并没有显著增大。研究结果可为泵喷-轴系-艇体耦合系统振动声辐射的控制提供指导。 展开更多
关键词 泵喷 分布式脉压力 泵喷-轴系-艇体耦合系统 模态 声辐射
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侧柱对串列双柱脉动压力的干扰 被引量:1
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作者 徐有恒 黄东群 《力学学报》 EI CSCD 北大核心 1997年第1期30-37,共8页
研究了串列双圆柱旁加上一个等直径的圆柱,组成一个等边三角形排列的三圆柱的脉动压力分布.着重研究侧柱对串列双圆柱脉动压力分布的影响.研究的结果表明,绕流等边三角形排列的三圆柱,受影响最严重的是后柱.脉动压力分布出现了严... 研究了串列双圆柱旁加上一个等直径的圆柱,组成一个等边三角形排列的三圆柱的脉动压力分布.着重研究侧柱对串列双圆柱脉动压力分布的影响.研究的结果表明,绕流等边三角形排列的三圆柱,受影响最严重的是后柱.脉动压力分布出现了严重的不对称,外侧的压力脉动极其强烈,内侧的压力脉动较弱,与时均压力分布,很好的对应关系.另外,侧柱对于串列双圆柱是否达到超过临界间距的绕流流态。 展开更多
关键词 三圆柱干扰 动压力分布 临界间距 流体力学
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重叠布置泄水建筑物坝面隔墙脉动压力特性研究 被引量:1
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作者 王旭 刘昉 《水利水电技术》 CSCD 北大核心 2011年第10期72-77,共6页
采用数值模拟的方法,利用大涡模型对重叠布置泄水建筑物泄流工况进行模拟计算,试验数据验证结果表明数值模拟方法合理可行。根据实测数据和计算结果,对坝面隔墙处脉动压力特性进行分析研究。通过对流场分布、频谱分析以及脉动压力强度... 采用数值模拟的方法,利用大涡模型对重叠布置泄水建筑物泄流工况进行模拟计算,试验数据验证结果表明数值模拟方法合理可行。根据实测数据和计算结果,对坝面隔墙处脉动压力特性进行分析研究。通过对流场分布、频谱分析以及脉动压力强度系数等研究,分析得出脉动压力的脉动源以及脉动压力在隔墙上的分布规律。 展开更多
关键词 重叠布置泄水建筑物 数值模拟方法 压力强度分布
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串列三圆柱的脉动气动力特性试验研究 被引量:6
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作者 刘小兵 姜会民 +1 位作者 王世博 杨群 《振动与冲击》 EI CSCD 北大核心 2021年第13期96-103,共8页
采用刚性模型测压风洞试验的方法研究了不同间距下串列三圆柱的脉动气动力特性,并与单圆柱和串列双圆柱的结果进行了对比。试验雷诺数以及间距比L/D(相邻圆柱中心距与单圆柱的直径之比)分别为3.4×10^(4)和1.212.0。研究结果发现,... 采用刚性模型测压风洞试验的方法研究了不同间距下串列三圆柱的脉动气动力特性,并与单圆柱和串列双圆柱的结果进行了对比。试验雷诺数以及间距比L/D(相邻圆柱中心距与单圆柱的直径之比)分别为3.4×10^(4)和1.212.0。研究结果发现,与串列双圆柱类似,串列三圆柱上游和中游圆柱的临界间距比(L/D)cr=3.54.0。在临界间距比附近,脉动气动力系数突升至最大值。串列三圆柱下游圆柱表现出两个临界间距比,分别为(L/D)cr1=2.02.5和(L/D)cr2=3.54.0。脉动气动力系数在临界间距比(L/D)cr1附近突升至最大值,而在临界间距比(L/D)cr2附近发生突降现象。气动干扰对串列三圆柱斯托罗哈数的影响表现为减小效应,与串列双圆柱相比,这种减小效应在L/D<(L/D)cr时更明显。 展开更多
关键词 串列三圆柱 风洞试验 动压力分布 斯托罗哈数
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高水头船闸平底廊道反弧形阀门净动水启门力恒定流试验 被引量:1
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作者 刘猛 胡亚安 严秀俊 《水运工程》 北大核心 2016年第12期82-88,共7页
通过恒定流试验对平底廊道反弧形阀门净动水启门力进行了研究,结果表明:1)底缘压力下降是反弧形阀门产生净动水启门力的最主要原因;2)各开度下反弧形阀门净动水启门力与孔口水流弗劳德数的平方成线性关系;3)阀门厚度变化对反弧形阀门最... 通过恒定流试验对平底廊道反弧形阀门净动水启门力进行了研究,结果表明:1)底缘压力下降是反弧形阀门产生净动水启门力的最主要原因;2)各开度下反弧形阀门净动水启门力与孔口水流弗劳德数的平方成线性关系;3)阀门厚度变化对反弧形阀门最大净动水启门力影响较小。 展开更多
关键词 高水头船闸 反弧形阀门 恒定流 水启门力 压力分布
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近壁圆柱绕流水动力特性数值模拟与实验研究 被引量:14
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作者 王国兴 孙万卿 《海洋工程》 CSCD 北大核心 2010年第1期42-49,共8页
通过数值模拟和物理模型实验,对距壁面一定高度的圆柱绕流水动力特性进行了研究。数值模拟采用有限体积法对标准k-ε模式方程进行离散,采用SIMPLE算法进行求解,模拟绕流流场。在物理模型实验中,将PVC圆管制作的实验模型安放在水槽内,在... 通过数值模拟和物理模型实验,对距壁面一定高度的圆柱绕流水动力特性进行了研究。数值模拟采用有限体积法对标准k-ε模式方程进行离散,采用SIMPLE算法进行求解,模拟绕流流场。在物理模型实验中,将PVC圆管制作的实验模型安放在水槽内,在圆管的跨中沿表面周向均匀布置水下压力传感器,用于测量绕流圆柱体表面动水压力分布。通过改变Re数和间隙比来分析它们对近壁圆柱绕流水动力特性的影响。基于数值流动显示技术,给出了近壁绕流流场的尾流流态分析。通过数值结果与实验结果的对比,对近壁绕流圆柱体的升力系数及其表面动水压力分布进行了研究,对比结果显示了较好的一致性。 展开更多
关键词 圆柱绕流 标准k-ε模式 有限体积法 压力分布 间隙比
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EXPERIMENTAL STUDY OF FORCED SHOCK TRAIN OSCILLATION IN ISOLATOR UNDER ASYMMETRIC INCOMING FLOW 被引量:3
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作者 曹学斌 张堃元 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2011年第1期73-80,共8页
To analyze the response of the wall pressure fluctuation in an isolator when the shock train is subjected to a periodic motion at a low frequency,the isolator experiment is conducted in a blow-down supersonic wind tun... To analyze the response of the wall pressure fluctuation in an isolator when the shock train is subjected to a periodic motion at a low frequency,the isolator experiment is conducted in a blow-down supersonic wind tunnel at free stream Mach number of 1.98 under asymmetric incoming flow.Experimental results show that:The isolator effectively isolates the periodic back pressure fluctuation from affecting upstream undisturbed flow;The wall pressure fluctuations are due to the propagation of wave fronts with the second acoustic mode,but they are subjected to an oscillating shock train in the most part of the shock oscillation region;The attenuation of wall pressure fluctuations on the lower wall with thick boundary layer accords with the exponential law,but it fluctuates on the upper wall with thin boundary layer in the shock oscillation region. 展开更多
关键词 engines shock waves pressure distribution ISOLATOR
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Air flow patterns and noise analysis inside high speed angular contact ball bearings 被引量:3
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作者 翟强 闫柯 +2 位作者 张优云 朱永生 王亚泰 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第9期3358-3366,共9页
The vortex formed around the rolling ball and the high pressure region formed around the ball-raceway contact zone are the principle factors that barricades the lubricant entering the bearing cavity, and further cause... The vortex formed around the rolling ball and the high pressure region formed around the ball-raceway contact zone are the principle factors that barricades the lubricant entering the bearing cavity, and further causes improper lubrication. The investigation of the air phase flow inside the bearing cavity is essential for the optimization of the oil-air two-phase lubrication method. With the revolutionary reference frame describing the bearing motion, a highly precise air phase flow model inside the angular contact ball bearing cavity was build up. Comprehensive factors such as bearing revolution, ball rotation, and cage structure were considered to investigate the influences on the air phase flow and heat transfer efficiency. The aerodynamic noise was also analyzed. The result shows that the ball spinning leads to the pressure rise and uneven pressure distribution. The air phase velocity, pressure and cage heat transfer efficiency increase as the revolving speed increases. The operating noise is largely due to the impact of the high speed external flow on the bearing. When the center of the oil-air outlet fixes near the inner ring, the aerodynamic noise is reduced. The position near the inner ring on the bigger axial side is the ideal position to fix the lubricating device for the angular contact ball bearing. 展开更多
关键词 high speed angular contact ball bearing air phase flow heat transfer efficiency cage structure
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Numerical Simulation of Wind Turbine Blade-Tower Interaction 被引量:15
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作者 Qiang Wang Hu Zhou Decheng Wan 《Journal of Marine Science and Application》 2012年第3期321-327,共7页
Numerical simulations of wind turbine blade-tower interaction by using the open source OpenFOAM tools coupled with arbitrary mesh interface (AMI) method were presented. The governing equations were the unsteady Reyn... Numerical simulations of wind turbine blade-tower interaction by using the open source OpenFOAM tools coupled with arbitrary mesh interface (AMI) method were presented. The governing equations were the unsteady Reynolds-averaged Navier-Stokes (RANS) which were solved by the pimpleDyMFoam solver, and the AMI method was employed to handle mesh movements. The National Renewable Energy Laboratory (NREL) phase VI wind turbine in upwind configuration was selected for numerical tests with different incoming wind speeds (5, 10, 15, and 25 m/s) at a fixed blade pitch and constant rotational speed. Detailed numerical results of vortex structure, time histories of thrust, and pressure distribution on the blade and tower were presented. The findings show that the wind turbine tower has little effect on the whole aerodynamic performance of an upwind wind turbine, while the rotating rotor will induce an obvious cyclic drop in the front pressure of the tower. Also, strong interaction of blade tip vortices with separation from the tower was observed. 展开更多
关键词 NREL phase VI wind turbine pimpleDyMFoam arbitrary mesh interface (AMI) blade-towerinteraction
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A DYNAMICAL INTERPRETATION OF THE WIND FIELD IN TROPICAL CYCLONES 被引量:3
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作者 郝世峰 崔晓鹏 +2 位作者 潘劲松 周冠博 胡波 《Journal of Tropical Meteorology》 SCIE 2009年第2期210-216,共7页
Based on the primitive equations in polar coordinates and with the supposition that parcel velocity in tropical cyclones is in linear variation and that the distribution of surface pressure agrees with the Fujita form... Based on the primitive equations in polar coordinates and with the supposition that parcel velocity in tropical cyclones is in linear variation and that the distribution of surface pressure agrees with the Fujita formula, a set of equations are derived, which describe the impact of perturbations of central pressure, position of tropical cyclones, direction and velocity of movement of tropical cyclones on the wind field. It is proved that the second order approximation of the kinetic energy of tropical cyclones can be described by the equations under linear approximation. Typhoon Wipha (2007) is selected to verify the above interpretation method, and the results show that the interpretation method of the wind field could give very good results before the landfall of tropical cyclones, while making no apparent improvement after the landfall. The dynamical interpretation method in this paper is applicable to improving the forecasts of the wind field of tropical cyclones close to the coast. 展开更多
关键词 tropical cyclones strong wind dynamical interpretation
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平板闸门底缘上托力的数值计算
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作者 何小新 《华电技术》 CAS 1992年第4期8-12,共5页
讨论了作用在闸门上的动水压力的数值计算问题,并针对闸门底缘上托力计算引入了边界元法。计算结果表明:边界元法对于此类问题的求解是经济而有效的。
关键词 平板闸门 上托力 数值计算 下吸力 压力分布 过流 势流 边界元法
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Distribution pattern of front abutment pressure of fully-mechanized working face of soft coal isolated island 被引量:16
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作者 Xu Wenquan Wang Enyua +2 位作者 Shen Rongxi Song Dazhao Zhang Jingmin 《International Journal of Mining Science and Technology》 2012年第2期279-284,共6页
The front abutment pressure of a fully-mechanized workface of 11061 soft coal isolated island of Liangbei Coal Mine was measured and studied using a self-developed mining-induced stress monitoring system associated wi... The front abutment pressure of a fully-mechanized workface of 11061 soft coal isolated island of Liangbei Coal Mine was measured and studied using a self-developed mining-induced stress monitoring system associated with electromagnetic radiation technology, and the effects of abutment pressure distribution on strata behavior we discussed. The results indicate that the miningdnduced influencing distance advanced at the fully-mechanized working face of soft coal isolated island is larger than that at the gen- eral working face at the isolated island, besides the fracture zone in front of working face was widened to some extent, and the influencing range caused by relaxations on both roadways became bigger with the advancing working face. Moreover, it can be indicated that mining has significant effect on strata behav- ior of fully-mechanized working face of soft coal isolated island, which is mostly distributed in the area of stress concentration. The research results have an important reference value for revealing the distribution pattern of the front abutment pressure of a fully-mechanized working face of soft coal isolated island, and controlling the coal-rock dynamic disaster occurrence under similar mining conditions. 展开更多
关键词 Soft coalIsolated islandFully-mechanized working faceAbutment pressureCoal-rock dynamic disaster
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Numerical Simulation of the Water Entry of a Structure in Free Fall Motion 被引量:1
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作者 Qingtong Chen Baoyu Ni +1 位作者 Shuping Chen Jiangguang Tang 《Journal of Marine Science and Application》 2014年第2期173-177,共5页
To solve the problems concerning water entry of a structure, the RANS equations and volume of fluid (VOF) method are used. Combining the user-defined function (UDF) procedure with dynamic grids, the water impact o... To solve the problems concerning water entry of a structure, the RANS equations and volume of fluid (VOF) method are used. Combining the user-defined function (UDF) procedure with dynamic grids, the water impact on a structure in free fall is simulated, and the velocity, displacement and the pressure distribution on the structure are investigated. The results of the numerical simulation were compared with the experimental data, and solidly consistent results have been achieved, which validates the numerical model. Therefore, this method can be used to study the water impact problems of a structure. 展开更多
关键词 STRUCTURE free fall motion water impact RANSequations VOF water entry
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Analytical solution for slope instability assessment considering impact of confined aquifer 被引量:3
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作者 冉启华 钱群 +2 位作者 王光谦 傅旭东 苏丹阳 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第4期1502-1509,共8页
An analytical approach was presented for estimating the factor of safety(FS) for slope failure, with consideration of the impact of a confined aquifer. An upward-moving wetting front from the confined water was assume... An analytical approach was presented for estimating the factor of safety(FS) for slope failure, with consideration of the impact of a confined aquifer. An upward-moving wetting front from the confined water was assumed and the pore water pressure distribution was then estimated and used to obtain the analytical expression of FS. Then, the validation of the theoretical analysis was applied based on an actual case in Hong Kong. It is shown that the presence of a confined aquifer leads to a lower FS value, and the impact rate of hydrostatic pressure on FS increases as the confined water pressure increases, approaching to a maximum value determined by the ratio of water density to saturated soil density. It is also presented that the contribution of hydrostatic pressure and hydrodynamic pressure to the slope stability vary with the confined aquifer pressure. 展开更多
关键词 confined/artesian groundwater slope stability factor of safety analytical approach
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A METHOD OF CALCULATING PRESSURE DISTRIBUTION OF PERIODIC PULSATION FLUID TRANSPORTED IN PIPING NETWORK 被引量:1
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作者 焦秀稳 阎祥安 +1 位作者 张承谱 石晓庆 《Transactions of Tianjin University》 EI CAS 1996年第2期61+58-60,共4页
The pressure pulsation induced by the pumped periodic pulsation fluid is the main factor of causing fluid resonance and stimulating pipelines vibrations and noise. In order to reduce the f... The pressure pulsation induced by the pumped periodic pulsation fluid is the main factor of causing fluid resonance and stimulating pipelines vibrations and noise. In order to reduce the faults caused by the vibrations of pipelines, two aspects have been researched: one is to develop high quality filters, weaken and restrain the crest of pulsation pressure; the other is to design structural parameters of the piping network and eliminate the fluid resonance. Both need calculating the pressure pulsations of different structural parameters and frequencies, and knowing the amplitude frequency. In this paper the stiffness matrix technique is used for treating the coupling of subsystems of pipelines and calculating the pressure distribution of the piping network and it is tested by simulation and experiments. 展开更多
关键词 periodic pulsation stiffness matrix technique COUPLE pressure distribution
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Characterization of Pressure Signals in Fluidized Beds Loaded with Large Particles Using Wigner Distribution Analysis: Feasibility of Diagnosis of Agglomeration 被引量:2
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作者 张建胜 吕俊复 +4 位作者 王昕 张海 岳光溪 SUDA Toshiyuki SATO Junichi 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2007年第1期24-29,共6页
An experimental verification is reported on the early predicting index of agglomeration in bubbling fluidized bed. Coarse quartz sand, which has the same density but larger diameter than the bed material, was used to ... An experimental verification is reported on the early predicting index of agglomeration in bubbling fluidized bed. Coarse quartz sand, which has the same density but larger diameter than the bed material, was used to simulate the initial agglomerated particle. Wigner distribution was used to analyze the pressure fuctuation of the tested bed, and the average amplitude of local domain frequency (LDF) and local peak weighted average frequency (LPWA) under different operating conditions were measured and compared. The results showed that the LDF is sensitive to the agglomeration phenomena and had quick response to the incipient agglomeration in fluidized beds. It can be concluded from the results that these two parameters could be taken as the characteristic indexes to the agglomeration in fuidized beds. 展开更多
关键词 bubbling fluidized bed pressure fluctuation AGGLOMERATION Wigner distribution
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Research on inversion high mining pressure distribution and technology of preventing dynamic disasters by MS monitoring in longwall face 被引量:2
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作者 CHENG Yun-hai JIANG Fu-xing ZOU Yin-hui 《Journal of Coal Science & Engineering(China)》 2009年第3期252-257,共6页
Under two rock strata combination conditions, over 10,000 microseismic events were received with microseismic location monitoring technology which possessed by the author's studying team, used in fully mechanized coa... Under two rock strata combination conditions, over 10,000 microseismic events were received with microseismic location monitoring technology which possessed by the author's studying team, used in fully mechanized coal face of Huafeng Mine of Xinwen Coal Mining Group Co., Shandong Province. On the basis of the achievement of the location results, the conclusions were drawn as follows: On the basis of the achievement of 3D strata fracturing situation and the section plane of microseimic events in different areas, the relationship between spatial structure of overlying strata and mining pressure field was found, and we might describe distribution range of dynamic pressure of advance pressure and lateral stress around long face, and range of structure ad-tivation. Quantitative guidance to prevent dynamic disasters was provided. The practice in coal mine got a effective results. According to the FLAG3D soft numerical simulation of diameter drilling hole (the diameter is 300 mm) to relieve pressure in specified geological condition in Huafeng Mine, the right distance of two dirlls is 2.5 m and the right depth is 12 m. The research pro-vided basic guiding and practical experiences for the underground microseismic monitoring and disaster prevention in side slopes or tunnels engineering. 展开更多
关键词 microseismic monitoring high-precision locating rock cracking mining high pres-sure coal bump demolition of danger
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