SU840354A1 - Method of assessing the impact hazard of rock - Google Patents
Method of assessing the impact hazard of rock Download PDFInfo
- Publication number
- SU840354A1 SU840354A1 SU792774529A SU2774529A SU840354A1 SU 840354 A1 SU840354 A1 SU 840354A1 SU 792774529 A SU792774529 A SU 792774529A SU 2774529 A SU2774529 A SU 2774529A SU 840354 A1 SU840354 A1 SU 840354A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- rock
- core
- loading
- separation
- stresses
- Prior art date
Links
Landscapes
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Description
(54) СПОСОБ ОПРЕДЕЛЕНИЯ УДАРООПАСНОСТИ ГОРНЫХ ПОРОД(54) METHOD FOR DETERMINING SHOCK HAZARDS
1one
Изобретение относитс к горному делу, св зано с проведением испытаний механических свойств горных пород и может быть использовано дл прогнозировани поведени массива на контуре обнажени в выработках в тех случа х, когда под действием возникающих в массиве напр жений происход т динамические формы разрушени приповерхностных слоев пород типа стрел ний , толчков и т. п., которые вл ютс предвестниками более сильных горных ударов в будуш.ем по мере роста напр жений в массиве.The invention relates to mining, is associated with testing the mechanical properties of rocks and can be used to predict the behavior of the massif on the outcrop contour in the workings in cases where the dynamic forms of near-surface rock layers occur under the action of stresses arising in the massif. shooters, jolts, etc., which are harbingers of stronger rock bursts in the future as the stresses in the massif increase.
Известен способ дл моделировани состо ни порол, в массиве, при котором осуществл ют искусственное отделение элементов породы, например в виде дроблени керна на диски под действием создаваемых в нем. напр жений 1.A known method for simulating the state of a foam in an array in which artificial rock elements are artificially separated, for example, in the form of crushing cores into disks under the action of them. stress 1.
Известен также способ определени удароопасности горных пород, включающий нагружение керна равномерной радиальной нагрузкой по его цилиндрической поверхности 2.There is also known a method for determining the shock hazard of rocks, including loading the core with a uniform radial load over its cylindrical surface 2.
Однако этот способ предусматривает воспроизведение стрел ни путем, бурени отверсти («выработки) и нагружени егоHowever, this method involves the reproduction of the arrows either by way of drilling the hole ("working out) and loading it
контура силами, действующими радиально. Продольна нагрузка, прикладываема вдоль оси, служит лищь дл предотвращени разрыва керна на диски. Вместе с тем, меха1|изм стрел ни на контуре склонного к таким влени м массива в выработках более сложен и обусловливаетс состо нием породы от одновременного взаимодействи нормальных и касательных напр жений, соотношение которых определ етс горнотехнической обстановкой и измен етс вместе с ней. Кроме того, кривизна контура пробуриваемого отверсти существенно вли ет на перераспределение напр жений и не позвол ет воспроизводить механизм стрел ни пород в чистом виде. Соотве тственно , использование результатов моделировани дл суждени о свойствах породы с точки зрени удароопасности не достаточно объективно.contour forces acting radially. A longitudinal load applied along the axis serves as a shield to prevent the core from breaking on the discs. At the same time, the mechanics1 of the arrows on the contour of the array prone to such phenomena in the workings is more complex and is determined by the state of the rock from the simultaneous interaction of normal and tangential stresses, the ratio of which is determined by the mining engineering situation and changes with it. In addition, the curvature of the contour of the hole being drilled significantly influences the redistribution of stresses and does not allow to reproduce the mechanism of arrows or rocks in a pure form. Accordingly, the use of simulation results for judging the properties of the rock in terms of impact hazard is not sufficiently objective.
Цель изобретени - повышение точности определени удароопасности путем повышени достоверности воспроизведени условий формировани стрел ни массива без бурени породы.The purpose of the invention is to improve the accuracy of shock hazard determination by increasing the reliability of reproducing the conditions of formation of arrows or an array without drilling rock.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792774529A SU840354A1 (en) | 1979-06-04 | 1979-06-04 | Method of assessing the impact hazard of rock |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792774529A SU840354A1 (en) | 1979-06-04 | 1979-06-04 | Method of assessing the impact hazard of rock |
Publications (1)
Publication Number | Publication Date |
---|---|
SU840354A1 true SU840354A1 (en) | 1981-06-23 |
Family
ID=20831299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792774529A SU840354A1 (en) | 1979-06-04 | 1979-06-04 | Method of assessing the impact hazard of rock |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU840354A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110044718A (en) * | 2019-02-02 | 2019-07-23 | 中南大学 | Rock burst proneness Grade Judgment based on uniaxial compression lag than index |
-
1979
- 1979-06-04 SU SU792774529A patent/SU840354A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110044718A (en) * | 2019-02-02 | 2019-07-23 | 中南大学 | Rock burst proneness Grade Judgment based on uniaxial compression lag than index |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Guo et al. | Experimental study on the failure mechanism of layer‐crack structure | |
Ma et al. | Research on effects of blast casting vibration and vibration absorption of presplitting blasting in open cast mine | |
Ma et al. | Numerical analysis on failure modes and mechanisms of mine pillars under shear loading | |
Shen et al. | Simulation of borehole breakouts using FRACOD2D | |
Wang et al. | Rockburst in sandstone containing elliptic holes with varying axial ratios | |
Chen et al. | Numerical simulation of dynamic damage and stability of a bedding rock slope under blasting load | |
An et al. | Hybrid Finite‐Discrete Element Modelling of Excavation Damaged Zone Formation Process Induced by Blasts in a Deep Tunnel | |
Lu et al. | Mechanism of Hard‐Roof Rock Burst Control by the Deep‐Hole Blasting: Numerical Study Based on Particle Flow | |
Shakeri et al. | The evolution of dynamic energy during drop hammer testing of Brazilian disk with non-persistent joints: An extensive experimental investigation | |
Dai et al. | Mechanical characteristics for rocks under different paths and unloading rates under confining pressures | |
Huang et al. | The introduction of neural network system and its applications in rock engineering | |
Zheng et al. | Impact dynamic properties and energy evolution of damaged sandstone based on cyclic loading threshold | |
Zhang et al. | Mechanical characteristics of coal samples under triaxial unloading pressure with different test paths | |
Liang et al. | Study on pressure relief effect and rock failure characteristics with different borehole diameters | |
SU840354A1 (en) | Method of assessing the impact hazard of rock | |
Yuan et al. | Dynamic mechanical response characteristics and cracking behavior of randomly distributed cracked sandstone | |
US6167964B1 (en) | Method of determining in-situ stresses | |
CA2337803C (en) | Method of determining in-situ stresses in an earth formation | |
Hu et al. | Experimental and numerical analysis of rock burst tendency and crack development characteristics of Tianhu granite | |
Shuang et al. | Use of acoustic emission for the detection of brittle rock failure under various loading rates | |
Liu et al. | Pattern Recognition of Signals for the Fault‐Slip Type of Rock Burst in Coal Mines | |
Xiao et al. | Investigation of the Effects of Freeze‐Thaw Cycles on Geomechanical and Acoustic Characteristics of Tuff Specimens under Different Stress Paths | |
Hu et al. | Fracture characteristics and geometric fractal of damaged sandstone under impact load | |
CN115597991A (en) | Test method for simulating fracture and damage behaviors of hard rock plate | |
He et al. | Numerical simulation study on parameter optimization of time sequential controlled blasting |