On possible causes of increase in seismic activity of mine fields in the Oktyabrsky and Taimyrsky Mines of the Norilsk deposit in 2003. Part II: Oktyabrsky Mine

The data are presented for seismic events with an energy higher than 10³ J that have taken place in the Oktyabrsky Mine from 2002 to 2003, and apparent velocities are estimated for regularly formed clusters of such events. A complex analysis is performed for the experimental measurements conducted for estimating development of deformation processes in rock masses during long-term mining of copper-nickel ores in the Oktyabrsky Mine field. Interconnection of the deformation processes and the local seismic regime is considered in the analysis.__________Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 5, pp. 3–25, September–October, 2004.     

三剪强度准则及其在巷道围岩弹塑性分析中的应用

基于12面体单元主剪面上的3个主剪应力及正应力均会对岩石的强度和破坏产生影响,在双剪强度准则的基础上提出了一个新的三剪强度准则,并对其进行了分析．研究表明,强度准则能较全面地反映岩石的基本强度特征．另外,还应用该新强度准则对静水压力条件下的圆形巷道围岩进行了弹塑性分析．分析表明,与采用Mohr-Coulomb强度准则的结果相比,巷道轴向应力和强度理论中的参数b对巷道围岩塑性区半径、应力分布及径向位移等均有影响．     

Increase in information content of the resonance acoustic method for determination of the rock mass properties

An algorithm of processing of data obtained by the resonance acoustic method of structural analysis is substantiated. The algorithm enables acquisition of information on distribution of rock density in the vicinity of mine workings. An example is cited for the way of using the algorithm to estimate the density of layer in the roof of workings in coal mines.Translated from Fiziko-Tekhnicheskie Problemy Rzarabotki Poleznykh Iskopaemykh, No. 4, pp. 35–39, July–August, 2004.The study was conducted with financial support from the Leading State Scientific Schools, Grant No. NSh-1467.2003.5.     

地下工程软弱岩体围岩结构的地震探测技术

以显德汪矿主运输巷道为试验研究对象，采用地震技术对软弱岩体结构进行了全断面探测，实现了岩体结构的空间定位和精确探测。     

Mechanics analysis on the conditions of rock burst occurrence in the coal mass of roadway rib

According to the rock burst features occurred in the coal mass of roadway rib in one mine, the mechanics model of coal mass and roof structure system along the edge of goaf was founded to analyze the stress of roof rock layer, so the subside curve of roof rock layer was deduced. Furthermore, the stability of coal and rock system were analyzed, the critical load and critical resistance zone were used to judge the danger degree of rock burst occurrence. The influence of coal mass strength, brittleness degree, coal seam thickness, roof thickness, suspending length, equivalent shear module on the critical load, critical resistance zone was confirmed. So the rock burst occurrence conditions of coal mass in roadway rib mainly depend on mining depth, coal seam thickness and hard roof and floor, which are decided by the above studies, and successfully applied in prediction and prevention of rock burst in this mine. Supported by the Natural Science Fund of Liaoning Province(20042176)     

Implementation of the calculation method for stress state in rock mass with backfill

The author presents a method for calculating stress-strain state of host rocks and filling masses with allowance for the sequence of underground mining, and determines the stress filed redistribution in the course of extraction of flat-dipping ore bodies and of the reserves under open pit bottom. The mining variants most preferred from the geomechanical viewpoint are substantiated. __________ Translated from Fiz.-Tekh. Probl. Razrab. Polezn. Iskop., No. 5, pp. 14–26, September–October, 2008.     

Estimate of the rock mass stress state in the course of mining the reserves subjacent the open pit bottom at the “Udachnaya” pipe

Using the mathematical modeling approach, the rock mass stress state is analyzed in the case of the open pit and underground mining of ore reserves of the “Udachnaya” pipe, the stability of the open pit walls and possible failure of the host rocks in the area of second working are estimated. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 25–35, July–August, 2007.     

断层带岩体裂隙网络蒙特卡罗模拟及应用

介绍了应用蒙特卡罗方法模拟岩体裂隙网络系统。计算结果充分体现了岩体中裂隙网络的渗透性,80%以上的结构面相互连通,构成水力联系,并且显示出三个优势导水方向,即NE、NW和近EW。模拟结果可作为断层渗透性和导水性分析以及防水煤柱留设研究的依据。     

Estimation of the parameters of an imminent seismic event focus by the free surface strains

Dilatancy zones generated by an active internal source of isolated force in a heterogeneous rock mass are studied. Based on the solution of an inverse problem, the method is proposed for locating and determining the source focus parameters using the measurement data on strains of the daylight surface. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 3, pp. 25–35, May–June, 2007.