The way to reduce pollution of mine water
(57) Abstract:The invention is intended to reduce pollution of mine water. The purpose of the invention is the reduction of oxidative processes in the mine water by limiting the exposure time to the mine environment on entering the underground mine water. Determine in the mine after receipt of groundwater. Buryats rising drainage wells at an angle of 30 10to the predominant open fracture aquifer. Equip the well casing pipes, hydrosilicate and pressure gauge and is connected to a well pipe, which serves underground water treatment facilities or drains. Sampling of water from the drains is carried out not later than 2 hours from the time of accumulation. 1 C. p. F.-ly. The invention relates to mining, mainly to the coal industry.Goal is the reduction of oxidative processes in the mine water by limiting the exposure time to the mine environment on underground water.There is a method of reducing contamination of mine water by creating a group of drainage for several mines, where the movement path of the mine water has increased, which contributes to the deposition of vesvese mine water prior dewatering through bookmarks wells from underground workings and separate issue of drainage and mine water .The disadvantage of this method is the fact that he does not exclude messages drainage water from the mine atmosphere and soil excavations, and this helps for a short time to increase the mineral component of pollution (decrease in pH, increase in dry residue and so on). The decrease in the movement path of the water is achieved by drilling new wells and construction of new drains and new pumping stations, time-consuming, expensive and requires time.For many mines characteristic is the presence of Tihonovich bacteria that accelerate the process of accumulation of acid mine water by oxidation of iron disulfide FeS2present in large quantities in the coal and surrounding rocks. Under these conditions, the drainage of water into the soil workings and the mine atmosphere, change in quality, become more saline and acid.The essence of the proposed technical solution is the transfer of groundwater in insulated piping system and submitting them directly to treatment facilities or drains without contact with soil mining and mine atmosphere.The method is as follows. Abrazame water in the main water tank mines, make sure that at the moment of entering into the mine underground water had a neutral or slightly alkaline environment (pH 7-9), which is typical, for example, for the Eastern Donbass, and the dry residue is 1-2 g/L. in other words, the quality of groundwater close to (or corresponds to) the standards of potable water.Make sure that in the main sump mine (WWTP) enters the water, for example, acidic (pH 3.5) and dry matter up to 8 g/L.Determine the position of the aquifer, where the water inflow into the mine and drill rising drainage boreholes at an angle of 20-40aboutto the predominant open fracture aquifer. Equip boreholes casing and insulating devices, connect hydrazidine and manometer. Spend sequentially measuring the flow rate and determine the operational reserves of groundwater, adjust the position of the valve so that the flow rate was less stocks, warrants, taking into account seasonal fluctuations in resources, protection of aquifers from premature depletion and, thus, stable operation of this intake for a long time with the same quality is ecient To reduce water flow through the borehole is determined by the formula
K=K1HC2where TO1- reduction coefficient resources aquifers in the autumn-winter period (for the Eastern Donbass calculated according to observations, and is 0.89);
TO2- coefficient taking into account the need to replenish stocks depending on the ratio of the bandwidth of the drainage system of this well Q m3/h and operating reserves aquifer Qem3/h .When the ratio is 1 factor K2may be taken equal to 1.When the ratio of < 1 K2accepted within 0,9-0,95. The meaning of application of this factor is to reserve 5-10% of the inflow to maintain stocks at a certain, not subject to reduction level.When steady pressure is applied the greater the ratio.The capacity of the drainage system can be determined by the known formula:
Q = 4103b , m3/h, where b is the diameter of the pipes of the system, m;
H - height of water column (pressure) in the borehole, m;
L is the length of the borehole, m;
g - acceleration of gravity 9.8 m/c2.After determining the K-factor and flow control with pomroy atmosphere and soil excavations passed directly to the sewage treatment plant or a water tank. When the mine Tihonovich bacteria water in a short time becomes mine. It was also established that the change of water properties (odor, color, taste, and so on) are changed after 2 h after sampling, so stay isolated groundwater in the sump should be limited to 2 h, after which the effectiveness of the proposed method will be reduced.At the same time subject to this condition, as experience shows, the efficiency of the method is very high.The method gives also the possibility to dilute falling into the mine brines, for example, attract netrenirovannykh of fresh water reserves, occurring at shallow depths. 1. The WAY to REDUCE POLLUTION of MINE WATER, including drilling, raise boring of wells in aquifers in the areas of water supply, drainage water from aquifers by wells, the transfer of the mine water from the sources to the drains or sewage treatment plants and reducing the movement path of the mine water for mining, characterized in that to reduce oxidative processes in the mine water by limiting the exposure time to the mine environment coming from aquifers waters which are well hidrosadenitis and pressure gauge and connect the casing with an insulated pipeline which is installed in mines, determine the reserves of the aquifer, compare them with the bandwidth of the system the well - tubing and convey water from rising well insulated pipe into a water tank or treatment plant, wells are drilled at an angle (30 10)oto stretch the prevailing open fracture aquifer and the flow of water set in compliance with the conditions of protection of aquifers from depletion.2. The method according to p. 1, characterized in that when the flow of water from the aquifer through the pipeline the residence time of ground water in the sump is installed not more than 2 hours
FIELD: oil and gas extractive industry.
SUBSTANCE: method includes use of device providing for manufacturability of assemblage of casing and drilling columns and concurrent drilling by two columns, provided with independent drives, and drilling, by casing column, of non-stable rock solids performed with frequency no greater than one calculated from formula
where Vmec - mechanical drilling speed, m/min, Fr - friction forces against rotation, Ften - friction forces against linear displacement, R - casing column radius, m, α - angle between vectors of directions of linear and rotating movements.
EFFECT: higher effectiveness, higher productiveness, higher reliability.
2 cl, 5 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: method includes erection of wall, prior reinforcement of rock massif along extraction track by drilling longitudinal and slanting wells and forcing reinforcing cementing solutions into these wells, destruction and cleaning of rocks under protection of cementing cover, erection of permanent support, following reinforcement of contour-adjacent massif by cementation solutions through wells, drilled perpendicularly to mine axis. Draining wells are additionally drilled with delay through cementing layer having length greater than thickness of reinforced rocks zone, to form a draining layer around reinforced cover.
EFFECT: higher effectiveness.
2 cl, 4 dwg
FIELD: mining, particularly for drawing-off gases from coal bed simultaneously with water removing from coal bed.
SUBSTANCE: method involves drilling vertical well having cavity from ground surface; communicating vertical well cavity with horizontal drain holes used for gas recovery from coal bed.
EFFECT: provision of access to large underground area from ground surface and uniform coverage thereof, increased efficiency of gas production due to increased drainage system area along the strike of coal bed and due to improved well drilling technique.
27 cl, 11 dwg
FIELD: mining industry, particularly to remove water from deep pits, especially in going to underground excavation in upper part of ore body.
SUBSTANCE: system comprises main pipeline, pumping unit with pumping pipe and power supply members. The system is additionally provided with lowering-and-lifting device arranged on pit side and tightening device provided with rope. The first rope end is connected with tubular case in which submersed pumping unit is installed. Submersed end of the case has throughput orifices for liquid passage. Through orifice formed at outlet case end communicates with pumping pipe orifice, which in turn is connected with inlet end of the main pipeline through connection pipe and connection flange. Outlet end of the main pipeline is secured in the lifting-and-lowering device.
EFFECT: reduced material consumption and increased efficiency of water drainage from water-filled deep pits.
FIELD: mining, particularly to prevent underflooding of ground areas to be shifted during underground mining performing.
SUBSTANCE: method involves forming contour trench-like cutoff curtain in ground; creating drainage devices inside the contour and removing water from ground movement trough. The contour trench-like cutoff curtain is arranged along predicted horizontal line of ground surface relief formed after ground subsidence and height mark thereof is higher than that of maximal ground water level in spring. Necessary throughput Q of drainage devices is set on the base of mathematical expressions.
EFFECT: increased safety of underground mineral mining.
2 dwg, 1 ex
FIELD: drilling and survey, particularly special methods or apparatus for drilling.
SUBSTANCE: underground system includes drain holes, the first well extending from well drilled from ground surface, mainly from underground excavation interval start to remote end thereof. The system also has a number of side holes extending from the first well. Distance between side hole bottom to well drilled from ground surface may be selected so that it is substantially the same for all side holes to facilitate side hole drilling. Method may also involve uniting two or more drain hole systems within the boundaries of underground zone to provide uniform coverage of full underground zone area. System may additionally have a number of communicating drain hole sub-systems associated with main well drilled from ground surface to reduce ground surface area, which provides access to underground zone.
EFFECT: increased efficiency, provision of uniform coverage of full underground zone area and reduced access area.
54 cl, 10 dwg
FIELD: mining, particularly to reduce ejection of underground water flowing into mine during mining operations to ground surface.
SUBSTANCE: method involves receiving and collecting of mine inflow, which enters mining zone from cone of depression along mine tunnels; cleaning mine inflow; accumulating thereof in underground water accumulation means and delivering mine inflow into water-bearing seam. Mine inflow is supplied out of cone of depression located outside of mining zone in direction of water-bearing seam depression line to provide water return in operating mine tunnels, wherein distance between lower edge of cone of depression and point of mine inflow supply must be not less than width of mine inflow spreading in water-bearing seam. Mine inflow to be discharged from water accumulation means is supplied to intermediate sump and then is filtered in water-bearing seam due to intermediate sump location in water-bearing seam. Mine inflow is supplied to underground or land-based intermediate sump.
EFFECT: increased efficiency of hydrological regime recovery and improved ecological safety due to landscape conservation and enhanced industrial safety due to elimination of underground gas accumulation in dewatered water-bearing seams.
4 cl, 3 dwg
FIELD: mining; construction.
SUBSTANCE: method of horizontal radial drain hole constructing in hard rocks includes vertical shaft sinking and drilling from it horizontal radial drain hole and constructing from its bottom additional vertical shaft. Using both shafts along the full length of horizontal radial drain hole it is located string camouflet charge. After charge explosion there are formed horizontal radial drain hole with area of bund fracturing and then on one side of newly formed horizontal radial drain hole there is mounted surface casing with closer and draining, and on the other - choke. On drained territory there is installed at least one hydro-supervisory well.
EFFECT: reduction of drill footage; reducing of horizontal radial drain hole breakingin terms; rising of its interception ability and ability to make an attendance for dewatering drained territory.
3 cl, 2 dwg, 1 ex
SUBSTANCE: method and device for erection of horizontal and drain hole in watered sands is related to mining industry and construction, in particular - to methods and devices for erection of horizontal wells with the help of rotary drilling in watered unstable sands and may be used to dry mineral deposits, industrial sites, to clear heads of underground waters in process of tunneling, construction of buildings with preliminary water drawdown, in erection of horizontal wells of various technical purpose in loose watered soils, also under conditions of high urban saturation. Achievement of result became possible due to maintenance of technological process at permanently maintained pressure of structural flushing liquid higher than pressure of stratal ground waters by 0.3-0.5 atmospheres under protection of stable layer, which is formed by structured flushing liquid on well walls, as a result of which impact of mountain pressure at drilling string is eliminated. Realisation of method is carried out by complex device characterised with availability of mechanical part, including drilling plant, conductor, sealant or drill string, or filtering string and support of vertical excavation, and also hydraulic system of structured flushing liquid pressure provision and maintenance in erected well as higher than pressure of stratal ground waters in periods of horizontal drain hole erection and installation of filters in it, which is made of three functional hydraulic lines.
EFFECT: provision of horizontal drain hole walls stability in process of drilling and installation of filters, increased depth of drilling and diametre of erected well, provision of controlled carryover of sand from layer, preservation of natural soil properties in near-filer zone; increased safety of technological process, increased efficiency of drilling, reduced load at performing elements of drilling plant.
10 cl, 2 dwg, 1 ex
FIELD: oil-and-gas production.
SUBSTANCE: providing of stability of well walls, process controllability of opening of waterbearing formation of operation of two waterbearing formations of one upward drain borehole has become possible ensured by creation of backpressure in annular space of well during all time of its drilling in incompetent rocks and also usage in particular case in the capacity of intermediate string of filtering pipe string. Device for opening of waterbearing stratums in incompetent rocks by upward drain borehole includes drilling rig, rotator, main mud pump, drilling assembly, intermediate string, filtering pipe string and equipment of wellhead, containing conductor, wellhead mandrel, pipes grab, gland, closing sleeve, outlet and shutter. Intermediate string is outfitted by ring, rigidly installed to it at bottom end with ability of installation of sealing ring for overlapping of annular gap between conductor and intermediate string. Device is outfitted by additional boring pump, connected to outlet of wellhead mandrel, and also by nozzle installed at outlet of this branch diametre of which depends on static level of waterbearing formations at wellhead and rotary crane for passing of water into outlet from additional drilling pump.
EFFECT: providing of ability of additional water removing.
3 cl, 4 dwg, 2 ex