نویسندگان
1 استادیار گروه مهندسی معدن، دانشکده مهندسی علومزمین، دانشگاه صنعتی اراک، اراک، ایران
2 دانشجوی کارشناسی مهندسی معدن، دانشکده مهندسی علومزمین، دانشگاه صنعتی اراک، اراک، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The main purpose of the present research, is not to cut the floor of stone block in quarrying dimensional stones in order to save the costs of the quarry operation and reduce the operation time. By using methods such as drilling parallel drill holes, containing quarry with feathers and wedge, use of expansion chemical materials and overlapping parallel drill holes methods, initial cutting the stone as well as separating it from the mountain without need to cut the floor is possible. Of course, in these methods, there are always limitations on the height and thickness (width) of the block and the speed of operation is low. Therefore, to achieve the goal, experimental studies were carried out, especially in the quarry method with diamond cutting wire in Mahallat, Hajiabad travertine mine located in Markazi province as a case study. In some zones of this mine, especially zone 14, there is a layer of shale under the travertine layer. In the experiment process, to simulate the reality in practice, first, two perpendicular vertical cuts (with a ninety degrees angle to each other) were created on the samples in the laboratory. Then, using a wedge-shaped steel piece with a flat end, a vertical force was applied into the crack of the stone samples. The results of the present research through experimental studies on four travertine stone samples of Mahallat Hajiabad with natural and fine layering, showed that by applying vertical force into the cracks of the samples without any floor cutting, smooth and flat fracture surfaces were created in the mechanically weak surfaces of the stone. This finding reveals the possibility of quarrying travertine building stone mines with layering and high height, by diamond wire cutting quarry method without the need for floor cutting.
کلیدواژهها [English]
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