Toppling failure is one of the most common modes of failure of rock slopes in layered rock strata. Flexural toppling is one of the well-known modes of the failure. This type of failure occurs due to bending stress. In this article, a brief yet comprehensive review of toppling failure is presented. Firstly, the conditions and general mechanism of the failure are described. Then, experimental, th...

In order to improve both the accuracy and efficiency of grinding slide, this paper designs a novel grinder with dual-lead-dual-head. Since geometric error is one major contributors causing machine inaccuracies, sensitivity analysis performed identify critical terms, an application self-test also given. The volumetric model 38 errors built using homogeneous transformation matrix (HTM) multi-body...

This paper presents a study on the recognition of the visual focus of attention (VFOA) of meeting participants based on their head pose. Contrarily to previous studies on the topic, in our set-up, the potential VFOA of people is not restricted to other meeting participants only, but includes environmental targets (table, slide screen). This has two consequences. Firstly, this increases the numb...

One of the most important instabilities of rock slopes is toppling failure. Among the types of toppling failure, block-flexural failures are more common instability which occurs in nature. In this failure, some rock blocks break because of tensile stresses, and some overturn under their weights, and next to all of them topple together. Physical and theoretical modeling of this failure is studie...

For many industrial parts, their natural resting pose differs from the orientation desired for assembly. We have found that it is possible in many cases to compensate for this difference using a parallel-jaw gripper with fixed orientation. The idea is to arrange contact points on each gripper jaw so that the part is reoriented as it is grasped. We analyze the mechanics of compensatory grasping ...

The Bethe ansatz method and an iterative procedure based on detailed balance are used to obtain exact results for an asymmetric avalanche process on a ring. The average velocity of particle flow, v, is derived as a function of the toppling probabilities and the density of particles, rho. As rho increases, the system shows a transition from intermittent to continuous flow, and v diverges at a cr...

Abstract Toppling rock slopes, induced by rapid and continuous downcutting of Lancang River, are widely distributed in the mountainous area southwest China. To investigate instability mechanism 1# toppling slope Huangdeng Hydropower Station under seismic loading, particle flow code (PFC) is applied to simulate dynamic response failure mode. The study considers characteristics displacement, velo...

As a new type of sliding support structure, composite structure has excellent performance. It is in which two rows reinforced concrete piles are placed an appropriate position and the front pile head connected with back body by rigid beam. will form double row spatial similar to seating. h-type anti-slide can save (or even do not need) anchoring components, double-row supporting system, achieve...