In order to study the dynamic mechanical properties of surrounding rock roadway in deep mines with burst, cyclic impact compression tests sandstone under different velocities were carried out by using split Hopkinson pressure bar (SHPB) test system, and stress-strain curves samples loads relationship between energy dissipation numbers analyzed. The results show that, as loading times increase, ...

The YL Tunnel of the Chongqing–Kunming high-speed railway project, a key project whole line, is typical ultra-long deep tunnel facing geologic problems, such as rock bursts, large deformation, water inrush, and toxic or harmful gas leakage, among which high ground stress results in most serious damage. This study incorporates existing studies materials, well data on obtained through tests using...

the prediction of the joint angle position, especially during tremor bursts, can be useful for detecting, tracking, and forecasting tremors. thus, this research proposes a new model for predicting the wrist joint position during rhythmic bursts and inter‑burst intervals. since a tremor is an approximately rhythmic and roughly sinusoidal movement, neural oscillators have been selected to underli...

We recently identified a novel human protein kinase, p160 ROCK, as a putative downstream target of the small GTPase Rho. Using the human ROCK cDNA as a probe, we isolated cDNA of two distinct, highly related sequences from mouse libraries. One encoded a mouse counterpart of human ROCK (ROCK-I), and the other encoded a novel ROCK-related kinase (ROCK-II). Like ROCK/ROCK-I, ROCK-II also bound to ...

Abstract In order to solve the problems of unreasonable allocation and low efficiency emergency rescue resources in coal mine accidents, it is necessary establish a resource model by using comprehensive weight-approximation ideal solution (TOPSIS method).This paper takes rock burst as an example extending this designed plan. Firstly, calculated weight evaluation index affecting selected AHP met...

The vibration wave CT detection technology could be used for forecasting dynamic disasters such as coal and gas outburst rock burst in mines well monitoring warning of impact risks. Based on the positive correlation between stress velocity abnormal distribution velocity, danger area determined. Two evaluation indexes risk were constructed: anomalous coefficient A n value m gradient variation ( ...

Rock burst is a sudden disaster that influenced by various factors. Accurately identifying and predicting rock risks of great significance for improving mine safety. In order to improve the accuracy prediction from perspective data structure, this paper constructs two-level model based on six features. The first-level uses Box-Cox, Yeo-Johnson, uniform transformations scaling extends using CTGA...