Basic Research On Non-explosive Breaking Seal Technology

In our country, a large number of coal mines work are closed due to gas and fire accidents every year. After controlling the accident, it needs to get rid of the closed to recover the production, but the existing breaking off technology is time-consuming and inefficient which cannot meet the needs. Therefore, it is of great urgency and importance to study the new break technology. This paper adopts the method of theoretical analysis、equipment research、similar experiments of seal break and numerical simulation, for the purpose of studying a safe and efficient break technique and equipment, establishing non-explosive break techniques.The theoretical analysis indicates that the non-explosive break technology is more proper, so this paper takes Boulder Buster method to develop break seal equipment. In the process of breaking, it needs to identify hazards accurately and develop safety control measures. Through similar break experiments, we research the relevant parameters such as charge amount and hole numbers, and also test the performance of break equipment. Experiment results show that the non-explosive break device has the advantages of simple structure, easy to carry, safe and etc, and new technology has the characteristics of high efficiency and low labor intensity. Analyze the experiment results to research on the difference of experimental results. According to the calculation, this paper analyzes the breakup area and radial cracks range and compare them with the experimental results. For the problems appeared in the experiment, this paper brings out the improvement program, establish and improve the break craft. Simulating the experiment of break concrete seal through numerical simulation method and applying ANSYS/LS-DYNA software to establish model. Research parameters such as stress, displacement and velocity of different particle in break process, and compare them with the calculation results. Though the study on particle displacement of free face, this paper finds that the parameters is reasonable.