Once More on the Relation of the Roof Collapse in the Stope of a Mine and the Universal Gravitation Effect

Li Ming Zhang; Ke Jian Zhang; Fu San Chen

doi:10.4028/www.scientific.net/AMR.524-527.321

Paper Titles

Fiber Optic Temperature and Gas Concentration Sensor for Mine Goaf Area Inner Detecting
p.302

High and Steep Slope Stability Analysis Induced by Goaf Based on 3D Fast Lagrangian Analysis of Continua
p.306

Numerical Research on Anisotropy Mechanical Parameters of Fractured Rock Mass
p.310

Numerical Simulation and Backfilling Materials Research on Coal Spontaneous Combustion of Thick Seam Large-Scale Top-Caving Region in Resources Conformity Coal Mine
p.317

Once More on the Relation of the Roof Collapse in the Stope of a Mine and the Universal Gravitation Effect
p.321

Research on Rapid Excavation Technology of Roadway in Coal Seam with the Risk of Coal and Gas Outburst
p.325

Residual Subsidence Prediction of Abandoned Mine Goaf Based on Wavelet Support Vector Machines
p.330

Rock Slope Fuzzy Stochastic Damage Study
p.337

Stowing Mining Technology in the Northwest Ecologically Fragile Areas
p.341

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 524-527Once More on the Relation of the Roof Collapse in...

Once More on the Relation of the Roof Collapse in the Stope of a Mine and the Universal Gravitation Effect

Abstract:

The phenomenon of great difference of mishap rate for roof collapse in the stope of a mine between day and night has been found in accordance with our observation in operational jobsite and the informations recorded over past 30 years,witch is regarded as a phenomenon of gravitational effect and is in the know by the inference of Newton’s Gravitational Principle that in general no one can explain it clearly by means of “mine pressure”,neverthless the major reason is that the direction of pressure on the stope roof between day and night is oppsite to the direction of the lunar gravitation (normal component force),and after it superposed onto the terrestmal gravity,their composite forces (PC) are different so that the pressure on roof is also various,greater in the night time and lighter in the daytime.this is why the roof collapse occurred in the nighttime is greater than that in the daytime.