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Dołączył: 29 Paź 2010
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 Wysłany: Czw 12:58, 18 Lis 2010 Temat postu: ugg stiefel 290 Mine Adit Nanfen extend the servic |
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290 Mine Adit Nanfen extend the service life of the feasibility study
Pieces, take W = 10m, K = 3. The safe distance: R ≥ 3 × 10 = 30m. There are 50-30 = plus m height can be taken. (3) The vibration velocity of the rock tunnel roof safe distance: , L, 1R ≥ 【Temple l ・ formula: R - blasting seismic safety distance, m; Q - the maximum period of millisecond blasting explosives quantity, kg; V - earthquake safe speed, cm / s; m - dose index, m = 1 / 3; k, mouth - and blasting point topographical, geological and other conditions of the coefficients and the attenuation index. Hard Rock: k = 50 ~ 100, port = 1.3 ~ 1.5; in hard rock: k = 150 ~ 250 , a = 1.5 ~ 18. For mining purposes. Values are as follows: rock instability, have good support when, = 10 ∞ 1 / s; surrounding medium stability, good support when, V = 20cm / s; surrounding rock stability, while without support, V = 30cm / s. Consider the stability of the roadway, take V = 30cm / s, Q = 40OOkg. k = 100, n = l_4, then: R = () ... ・ (400o)-2_3 × 15.9 = 36.5t 'n can Ore thickness :50-36 .5 = 13.5m. Can be seen from the above calculation. Adit 290 is still in the blast from a safe distance, but because of the above formula are the empirical formula , the results still need to be verified in Nanfen. If controlled blasting of the drug turn, 29O adit security will be greater assurance. 2.3.2 Blasting Vibration Measurement and Analysis July 16, 1999 for the 5th District to shake the ditch blasting explosive, single-stage maximum dose is 3t. Most of the ink hole in the 70m range,[link widoczny dla zalogowanych], which has a hole is 290 East Bangding board at the adit. To verify the correctness and blasting the accumulation of empirical data on the 290 adit was blasting vibration test , the measured X, Y and Z direction of the maximum vibration velocity was l0.5,[link widoczny dla zalogowanych], 9.44 and 5.9CTII, Is, recommended values are less than a point of order, it can be considered to have a larger safety factor. 3 Conclusion of the 290 adit engineering geological survey, support technology research and open-pit mining integrated technology research results show that the 290 adit extending the service life of transportation system is safe, not only technically feasible and financially reasonable. Annual savings of about 20 million yuan vehicle transportation costs,[link widoczny dla zalogowanych], but also reveal the open-pit mining process on the influence of underground roadway and the corresponding rules for the transition to underground mining to open pit Nanfen provide important data and experience. Reference text t: [1] LI Baoxiang. Cream metal deposits of jade mining [M] Beijing: Public Health and published in well-being of the rule of boxes. 1992 [2] Wang assistance. Ai heap Seoul coal mine adit floor layout of the 193o Discussion [J]. Grip mine design, 19 d (4). [3] Ya-Han. Li Ping, Han Xianghua, et al. Lu Yu-rock gold mine of foreign exploitation Discussion [J】. Gold. 19 d (4). [4] Li Ping. Han Xianghua, Ya #, and so on. I rock gold mine Ointment present status of mining [J]. Gold. 1997 (7) the United States developed automatic four bolt JP. 'Iil. On Monday US Secretary integrated set of mining equipment drop-Xuan support development of automated scanning equipment. Recently it developed a new type of four bar machine is one of description. Selected well to go four dimensions reported functional scanning bar to install four bolts, thus saving a walk when asked. Take advantage of its most long-wall mining in the area take the amount of material to be transported for use. The new machine can scan bar to choose a standard size of material handling system,[link widoczny dla zalogowanych], a material pallet in the warehouse on the truss on the Mino, pallets , and air are the same, and then I made with Huo surface mounted directly to the wrong lever machine. 6 Fortunately, the feedback system uses pull technology to replace the computer program logic can be drawn bat control, so wrong for each anchor rod hole Mi Tau function returns information. Results of artificial paradise Yi wins eight feedback control precision drilling and driving the wrong pole safety Mino cycle, the operator can completely pull Fortunately, the boat stage 6 and the withdrawal of the feedback necessary to carry out or pull fortunate 6. The wrong lever to adjust the forward speed of rotation and the best split time, drill bits and grinding rock breaking the contrary, the size of debris left by reducing the amount of respirable dust to the dust collector system includes a set of special spines of pure, self-Greece detection of vacuum drawn horizontal well drilling, if the starting block, so that Lu automatically clean up this folder to avoid solder express, plug the stick in the Republican control of the phenomenon of shoes. Procedures using drilling parameters can be bats can provide consistent management of equipment. These parameters include: the ability to go drilling, drilling holes drop-limits,[link widoczny dla zalogowanych], but collecting dust. I limit the power holes. Free-run drop-limits and Ankui chain. Feedback control system can also be preserved bat eight procedures match the wrong tree and folders rod king put the mother time. An error bar Mino Mino security procedures to make the wrong shot into contempt step process 1. l ¨,} | l
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