BLAST SOUND DEADENING METHOD AND BLAST SOUND DEADENING MECHANISM

• Main Authors: IWATA KOJI, TANAKA SHOJI, INAGAWA YUKIHISA, TACHIBANA TOMOHISA, SAITO TATSUMI
• Format: Patent
• Language: English; Japanese
• Published: 13.04.2015
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; MINING; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

PROBLEM TO BE SOLVED: To improve a blasting method and a blasting structure of a blasting area such as a working face, and thereby enhance a sound deadening function.SOLUTION: Multiple blast holes 3 buried with explosives 3a are formed in a working face 2 of a tunnel 1, and then a foam solution prepared by diluting a gas generating agent with liquid is sprayed on an end face 2a of the working face 2 so as to cover each blast hole 3, and thereby a sound deadening layer 4 is provided. By the sound deadening layer 4 provided by spraying the foam solution on the end face 2a of the working face 2, a sound deadening function can be enhanced in the blasting of the working face 2. Also, the sound deadening layer 4 can easily be provided by the blast of the foam solution. 【解決手段】トンネル１の切羽２に爆薬３ａを埋設した複数の発破孔３を形成した後、発泡剤を液体で希釈した泡溶液を切羽２の端面２ａに各発破孔３を覆うように吹き付けて消音層４を設ける。【効果】切羽２の端面２ａに泡溶液を吹き付けて設けた消音層４により、切羽２の爆破時に消音機能を高めることができる。また、泡溶液の吹き付けにより消音層４を容易に設けることができる。【選択図】図１