Research And Design On The Well Lane Prespliting Smooth Blasting Of One Side Closed Cumulative Cuting Tube

The excavation method of Underground tunnels rockway directly affect the quality of the alley of engineering, schedule, and performance. Incorrect excavation method will reduce bearing capacity, increase the quantities of roadway excavation and operation time, It is not allowed in the alley of excavation,especially in the tunnel construction, meanwhile increasing the expense of the later support measures and prolonging the period of the underground tunnel line construction. Therefore it is extremely vital significanct to. excavate on underground tunnel in the advanced, fast and reliable construction methods.In order to save the construction cost, speed up the construction progress, Currently the blasting method of directional breaking which is gradual tested and promoted in rock blasting engineering construction can effectively achieve smooth blasting effect. That Fusion seam blasting cut is used in the production test is conducted in only on coal mine of Kong village. This method was only rougher qualitative analysed in principle, failure to form a systematic theory. Based on the analysis of the summary of the engineering blasting test material,this paper analyses the basic theory of smooth blasting molding. puting forward the reasonable optimization measures for related parameters when implemented blasting and expounding the design principles of fusion Cut tube,aslo particularly elaborating the fusion Cut tube which is used in underground tunnel rock blasting engineering. Basicly includes the following aspects:(1) Puting forward use fusion blasting theory to realize the method of smooth blasting underground tunnels rock, particularly elaborating the domestic and foreign research status of fusion blasting theory, And briefly introduceing on the achievements and problems of the project reach.(2) Particularly elaborating the fusion blasting theory, Explaining the destruction form of rock under the explosion load, And calculating parameters existing in the fusion blasting theory.(3) Confirming the design parameters of the fusion Cut tube, and processing three kinds of the component realizing fusion blasting, and doing a simple comparison test On the ground and proved that using PVC plastic tubing for realizing this theory has important reference meanings.(4) Illustrating the basic geological conditions of Roadway test, and partly modificating the original homework rules, and reaching an agreement on the parameters which is from the fusion blasting, guiding a significance for projects.(5) Doing a fusion Cut tube blasting test under in underground tunnel fusion blasting in Kong village, according to the test results t enumerates the contrast analysis of the blasting results before and after test, it is very significant to use fusion Cut tube to realize smooth blasting theory.