장공 계단발파에서 Primer의 위치가 발파진동에 미치는 영향

강추원,양해승,문창일 朝鮮大學校 建設技術硏究所 2000 建設技術硏究 Vol.20 No.1

Not only blasting effects is variable in the long depth hole bench blasting performed at open pits in accordance with working conditions, rock mass conditions, but the blasting vibration velocity is also variable. In comparing the blasting velocities according to blasting methods when long depth hole bench blasting was performed in open pits, the direct priming and indirect priming methods were utilized the level of ground vibration was measured according to the primer position. Also, the regression analysis was measured by real vector value. The results are as followinvg; 1. In the study area, the equation of square root and the cube root shows the confidence of vibration to be 95% as follows; 1) direct priming V=600.6331(◀원문참조▶)^(-1.285) r²=0.869 V=1565.9100(◀원문참조▶)^(-1.290) r²=0.841 2) indirect priming V=549.5082(◀원문참조▶)^(-1.135) r²=0.855 V=1229.3823(◀원문참조▶)^(-1.182) r²=0.869 2. In case of applyion the Scaled Distance ( SD ) of square root, it is shown that the direct priming method has a lower vibration level than indirect priming method, and in the case of applying the SD of cube root, it is the same as the result in the upper a level of SD. 3. Therefore, the direct priming method is recommended to as a means vibration in long depth hole bench a t open pits.

Chute의 設置角度에 관한 硏究

姜秋遠 조선대학교 동력자원연구소 1989 動力資源硏究所誌 Vol.11 No.2

The working face haulage in coal imning because of the specific veins in the coal deposits of our country, was mainly used chute of trough using the inclination. When the various coals were transported by chute using the inclination, the dependences of teh self-acting inclination upon the various poeration conditions were investigated, through the experiment. The experimental procedures were as follows ; 1) The dependence of the self-acting inclination upon the weight change and the size change of coals was investigated. 2) The dependence of the self-acting inclination upon themixing degrees of massive coarse coals and finely particlated coals wasi nvestigated. 3) The dependence of the friction decrease and limited amounts of water upon the self-acting inclination was investigated. The optimum self-acting inclination in chute used for coal transport was determined by means of the above experimental results.

록 볼트 및 스파이럴 볼트의 지보특성

강추원,이청신,김동조,조영동,송명규,추석연,강성승 한국암반공학회 2008 한국암반공학회 학술대회 및 세미나 자료집 Vol.- No.-

비전기식뇌관의 트렁크라인 시차가 발파진동에 미치는 영향

강추원,고진석,김재웅 朝鮮大學校 建設技術硏究所 2000 建設技術硏究 Vol.20 No.1

In this study, blasting condition uniformed, and vibration value changed by the trunk line and measuring distance was measured. Four patterns of delay time of surface detonator and trunk line which are used at open fit blasting UB-25 and surface detonator of UB-17, trunk line UB-17 and surface detonator of UB-42, and trunk line of UB-25 and surface detonator of UB-42 are used in pattern 1, 2, 3, and 4 respectively, In result, the overlap time in pattern 1, 3 are 10 times respectively. Because of that reason, the value of vibration velocity in pattern 3 is smaller than in pattern 1. As the time difference of Trunk line, a method of decreasing the surface vibration is to design the number of overlap minimized a t interval time.

지표발파시 주파수 특성에 관한 연구

강추원,고진석,이형주 조선대학교 에너지.자원신기술연구소 1998 에너지·자원신기술연구소 논문지 Vol.20 No.1

One of the most troublesome and controversial issues facing the construction is that of ground vibrations, fly rock and air blasts produced from blasting Particularly, ground vibrations bring on directly or indirectly many damages On this study, data of vibration was collected in rock blasting then analyzied data and frequency characterizations of blasting vibration was studied The results can be summarized as follow 1 the formular of square and cube root scaled distance which have a confidence level at the point of 95% are as follows V = 6159.564(D/W^(1/2))^(-1 824) V = 11368.677(D/W^(1/3))^(-1 846), respectively 2 It was found that is proper to get principal frequency by Fast Fourier Transform among two methods 3. This study suggests that new allowable values of vibration according to frequency Namely, If principal frequency is more than 20㎐, then allowable values of vibration should be 0 5㎝/sec and less than 20㎐, then allowable values of vibration should be 0 3㎝/sec.

Barton-Bandis 절리 모델에 의한 지하대공동 암주의 변형 특성 연구

강추원,임한욱,김치환 한국암반공학회 2001 한국암반공학회 학술대회 및 세미나 자료집 Vol.- No.-

계측위치와 자유면 방향에 따른 지반진동 특성 연구

강추원,양해승,이수연 조선대학교 에너지.자원신기술연구소 1999 에너지·자원신기술연구소 논문지 Vol.21 No.2

The free face is an important part in the blasting design and plan. Most of study on the free face is referred to concern with fragmentation volume and determination of charge per delay. But the characteristic of vibration for the direction of the free face short of studies. This study shows the difference and characteristics of the vibration velocity for the measuring point and the direction of the free face. At the velocity of vibration, the back of the free face is over the front (Probably 1.20~1.29 times). A nomogram was made in relation to the maximum charge weight per delay on the basis of the 95% vibration blast equation and the velocity of vibration allowance set 5㎜/sec. Scaled distance was 29.71㎏/m^(1/2), 39.63㎏/m^(1/3) on the front of the free face and 34.03㎏/m^(1/2), 45.20m/㎏^(1/3) on the back of the free face.

사면발파의 WIDE SPACE 발파의 시공에 관한 연구

강추원,한남철 조선대학교 동력자원연구소 1995 動力資源硏究所誌 Vol.17 No.2

In this study, to protect final face of the rock and form the smooth face, it was practice the pre-splitting blast with detonating fuse. The test rocks consist of granite-gneiss, granite and dikes. The rocks divided into three zones, weathered rock, weakly weathered rock and unweathered rock; and blasting index applied 0.17, 0.2 and 0.25 respectively. A new blasting method(wide space blasting) was practiced for the purpose of the better work-efficiency, compared with the conventional blasting method. When the hole space is E = 6.67W, the products of the massive rock were down 51% and the loadings were increased 34%, compared with the conventional blasting method. Although the amount of used explosives was increased 12%, it has been that the wide space blasting was more effective than the conventional method.

地下採掘에 따른 鑛害防止對策에 關한 硏究

姜秋遠 조선대학교 국토개발연구소 1981 국토개발연구 Vol.3 No.1

Due to rapid increase in production of coal and other mineral resources in the nation, the underground mining below the local drainage level will be proceeded and the underground spaces and the length of gangways and branches will also be increased accordingly. Subsequently, damages by the mining operations, Such as, Surface subsidences, waste water treatments, etc, became public problems. Especially the surface subsidence problem became the most serious problem in underground mining operations. The purpose of this paper is to find the adequate methods to prevent and to minimize those damages, due to mining operations and to maintain the effective industrial operation, by observing the damages which comes in various ways and by planning the methods which will eliminate such damages.

석·골재 자원의 효율적인 개발에 관한 연구

임한욱,강추원 강원대학교 부설 석재복합신소재 제품연구센터 1999 석재연 논문집 Vol.4 No.-

우리 나라는 건설용 파쇄암의 대부분을 채석장에서 공급하고 있는데, 그 양은 40%를 상회하고 있다. 발파는 생산성 향상을 위한 중요한 요소로서 채석장의 경우 발파 패턴은 주로 파쇄암의 지질조건, 소요입도 및 크기, 공경과 공 심도, 그리고 사용폭약의 종류에 따라 결정된다. 본 연구에서는 생산성을 향상시키고, 소할 발파를 감소시킬 수 있는 패턴이 설계되었는데 이용된 공식은 수많은 국내외 실적으로부터 구해진 경험식에 따른 것이다. 설계에 의해 제시된 자료는 발파 요소를 결정하는 지침으로 활용할 수 있을 것이다. Quarries produce most of the rock required for construction in our country. Over 40% of aggregate are being supplied from blast rock. The blast is very important factor to improve productivity. The blast pattern in quarries is in general determined by the geology of the material to be broken, the fragmentation required, the hole diameter and depth, and the types of explosive. In this study some blast patterns for increasing productivity and reducing amount of fragmentation are designed. The formulae used in the calculations are empirical but are based on informations from many field blasts. The designed data can be used as a guideline to assist in determining blast factors.