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The incidence of dynamic rock disasters is closely related to the distribution of stress in the surrounding rock. For the safety requirement of the construction and the operation of underground caverns, the stress of surrounding rock is monitored to evaluate the stability of underground caverns. The construction of spillway tunnel in Wawushan project was taken as our research object. We studied the...
With the deep mining development of coal resource, many safety problems have arisen and become serious gradually, such as tunnel deformation, rock burst, and so on. Multi-source techniques and methods must be used to monitor and study the behave laws of tunnel pressure, thus safety and efficient mining can be guaranteed. It takes the working face No. VI 15-22020 and its transportation tunnel of 2nd...
According to the statistics, roof and side fall accidents often occur and jeopardize greatly in coal mines. The variation of the strain and stress in the surrounding rocks of the mine roadway can predict the accident. How to obtain the strain and stress is the key point of the prediction. This paper provides a method on the case. Firstly the principle of monitoring stress in surrounding rocks of mine...
Through the theoretically analyzing of the foundation of outburst prediction indexes and the existing prediction data of coal mine, a mathematics model was established with the dimension theories by considering with weights of dominant factors for ascertaining sensitive factors of coal seam. The established model and grey relevancy analysis were successfully verified in four coal mine of Pingdingshan...
A new type of monorail hanging technology was invented to solve the auxiliary transportation problem in soft rock or coal bed roadway, and clearly introduced the hanging scheme and making a feasibility analysis. This new type of monorail hanging technology makes the monorail application in soft rock or coal bed roadway to be possible, solves a major problem in mine auxiliary transportation mechanization...
The relation among job satisfaction, stress level and self-efficacy of safety staff in coalmine was investigated by a questionnaire survey conducted to 43 employees in a state-owned coalmine. The results showed as follows: stress level could predict job satisfaction negatively; self-efficacy could not only predict job satisfaction positively, but also adjust the effect of stress level on job satisfaction;...
In this paper, finite element analysis has been applied on the Phi2.8 mtimes5.75+2.25 m of southern Africa that has been contracted by CBMI Construction Co Ltd. Different contact finite element model as manholes in different position of the twelve clock points are built by using ANSYS parametric design language (APDL). Stress and deformation under the actual condition were presented by calculating,...
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