In the process of construction site accidents disaster a situation is finishing the direction in which most contractors are responsible. Several have way to improve the accountability of the construction participant in a construction site accident, but in particular, prices on improvements to the nakchalje, conducted at the forefront safety awareness to improve the supervision and management supervisor, maps technically allow some advice the knowledge about the technical safety of the safety officer is required and is considered to be especially made by designers and effective safety management from the design phase to improve safety awareness of the Engineer, prime Director and partner Director, hazard safety awareness to improve workers' In order to reduce the is believed necessary.
The blast hole has a space between explosive and hole wall, and blast forces reaches the hole wall face with a large amount of loss during passing through this space. The loss ratio of blasting forces are different to this packing material of space like air, water, etc. In this study, the effect of packing materials is investigated by the numerical simulation analysis. The simulation is carried out to two phases; 1st phase is to compute the impacting forces reaching on the wall face passing through packing materials(air, water), 2nd phase is to study the blasting effect(block size of cracking, direction of driving forces, etc.) in real site. The reaching force at the wall face in the water is larger than in the air. This study shows that the water as packing materials is superior to the air.
In the blast work inevitably exists a vacant space between drilling hole wall and explosive. So it cause an blast inefficiency called on a decoupling effect. In this study, For enhancing the detonation efficiency and reducing the environmental problem(vibration, noise, etc.), water is used to fill the vacant space. Water filling has many advantages such as efficiency, low price and workability. In the comparison analysis the field test is carried out. It result on an aspect of the effectiveness and safety. The result measured in the field is as follows; First, the water tube blast reduces the vibration by 16.5% and lessen the noise by 1% comparing to general blast. Secondly, water tube blast makes a separation distance shortened by maximum 15m. Thirdly, in the case that the same quantities of explosive are used, the amount of crushing per hole increased by about 12.8% in water blast method. The quantity of the explosive is reduced by about 11.4% comparing with general blast.
연구는 산업현장에서 발생하고 있는 중대재해를 줄이기 위해서 시행되었으며 특 히 재해 발생이 두드러지는 소규모 영세사업장을 위주로 작성하게 되었다. 소규모 현장 의 사업주는 근로자에게 개인보호구를 지급하지 않는 경우가 많아 개인보호구를 착용 하지 않고 작업장에서 작업을 하게 되고 자연스럽게 재해로 노출되고 있는 실정이다. 본 연구에서 실질적인 개인보호구 지급 방법에 대한 방안을 제시할 것이며, 기존의 산 업안전보건법상 사업주의 개인보호구 지급 기준에 대한 개정을 주장하여 재해율을 줄 이는 데 이바지하고자 한다. 근로자는 개인보호구를 스스로 구입하여 착용을 해야 하 며, 정부는 근로자의 자발적 개인보호구 구매에 대한 보상으로 퇴직공제부금을 인상하 여 주어야 하고, 사업주에게 산재보험료를 인상하여 적용, 징수하고 이 산재보험료를 통해 근로복지공단에서 개인보호구를 근로자에게 지급하는 방안을 모색해야 할 것이다.