Karst collapse of the mine water control engineer

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Karst collapse of the mine water control engineering problems

After the extent of the harm can be reduced. (1) The Methods in the thinning and drainage works thousands of structures, to prevent the sediment out of drainage over time, can reduce the production of ground subsidence. If Leroy manganese dewatering design, the use of dewatering hole surface precipitation, precipitation Holes fortified sediment filter to reduce the ground collapse. (2) to prevent a sudden inrush of mine, to avoid wide fluctuations in water table is generated to reduce road surface collapse of one of the measures. Therefore, the design of water control works to prevent mine suddenly have to formulate a series of gushing water assurance measures. (3) meeting the requirements of safe mining under the premise of controlling water and groundwater dewatering rate of decline. 2. Ground Water Control 1) The peripheral subsidence subsidence as water scouring low-lying, in order to prevent the catchment area around the mainland of the infiltration of runoff deterioration table border collapse, and not to the threat of surface water into underground mining of groundwater, it should collapse The peripheral area drainage ditches. 2) The collapse of comprehensive management of the river area who did not have 0-150-85 did not produce collapse collapse collapse did not have collapsed road in the area of the river, generally low-lying, river bottom turn of the geological structure and hydrodynamic conditions are well developed karst leaving very active , combined with thin soil, the water in direct, vertical infiltration, once the collapse of a large number of holes to form water poured into the ground will make dramatic increase underground water inflow, to pose a serious threat to mine safety. Water at Hill mine, was at home in 1968 when the river floods, sliding home the bridge had fallen heir No. 8, sinking to 1.5 million m of underground water, so that underground water inflow from the 837m. / H soared to 2016m. / H. Tai Kwong Iron Mine, occurred in 1980, a 160m Chung Nanping Lane suddenly flooded wells, in the KE family ditch within the scope of cross-strait 42m collapse produces 18 holes, the water poured into the mine about 6000m. / D. Thus, when the mine subsidence area in case of river water hit attaches great importance to the prevention and control engineering. (1) river diversion: divert the river to avoid the collapse area is a radical measure. Control of water in the big wide mountain design in the KE family ditch upstream of closure, the foot of the river turned east along the distribution of lots of non-soluble extraction mining. Sometimes full range of diversions such as swaddling clothes is not the economy, the worst location in the partial collapse of diversion of treatment, such as Guangxi, top wine deposit, only to collapse were the most serious 1313m river diversion at the local glass!. (2) of the river straightened to increase the discharge to a one 『§ 7. 3 open-pit mining gently inclined ore body design practice Design Institute and Research Bureau of Mines Kunyang car ah 【Abstract】 Feng Yi. Chih-Kun phosphate based on many years of mining experience in research design and production practice dinner. Ore Body Lotion to gently feed neck design for a Discussion on mining technology. Comparison of the short wall and the wall are two possible long-mining technology and related parameters. I. Introduction Kunyang Phosphate mining is gently inclined slope of a typical open pit mine, is also a major producer of phosphate rock base. 1. Overview Kunyang Phosphate Mine in Kunming, south 72kin Department, White has produced a total of 1965 construction of phosphate rock 18,329,600 t, with an average grade of PO in 3O about the development of China's phosphate industry has made some contribution. Department of marine sedimentary deposits of large phosphate rock deposits occur in the Lower Cambrian in the bottom of the plum village, the impact of deposit by the geological structure along the ore body to be cut into several sections ore blocks, when the mining the trench as a dividing line Qing, the ore body is divided into a number of mining area (see Figure 1), from east to west for mining. X {a tape of a state ... Ⅸ sector - a compensable ▲ 1976 High Road, Zhai Figure 2 l solid surface mining. Output layered ore mining conditions, to the east-west, south orientation, with an average inclination of 15. , Deposit with the industrial exploitation of the value of the ore body has two, the power of upper and lower ore mining complex topography of the river when l is not easy diversion, or diversion is economically unreasonable, can be bent too much on the local river bend cut-off straight, to increase its discharge capacity, reduce the flood water to go into underground river winding circuitous migration opportunities. , (3) seepage bed reinforcement; of impervious reinforcement of the river, should seek the man on the bed on the rock matrix to ensure its stability. Currently, the main structure of artificial river bed; water L1 Hill lead-zinc soil plus three reinforced concrete structure; Siding Lead off of reinforced concrete structures and rock mortar used in the spring mine masonry, etc., can achieve the desired impervious reinforcement effect. 3) The ground collapsed hole filling has occurred in order to prevent the collapse of rainfall along the hole into the ground, increasing the burden of underground drainage, the ground collapsed hole should be backfilled treatment. Hole under the collapse happened, can be respectively filled with concrete or stone at the bottom of the upper part of the concrete used to reinforce the treatment, the individual situation can be filled with concrete, requiring backfill, the backfill above the surrounding ground surface of 0.3 ~ O. 5m, to prevent the infiltration of rainfall runoff.
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