50results about How to "Lower Wetting Line" patented technology

The invention discloses a chemical siltation resisting drainage device for a tailing dam, comprising a drainage pipe, a siltation resisting trough, water seepage holes, water seepage troughs and geotextiles. The invention is characterized in that the drainage pipe is a circular pipe, and the end part of the pipe is provided with the water seepage troughs and the water seepage holes, and the water seepage troughs are tightly wrapped by the geotextiles; the siltation resisting trough is a rectangular box body having no cover, and the front end of the box body is provided with a circular hole having the same pipe diameter as the drainage pipe; the drainage pipe is obliquely arranged in the siltation resisting trough of the box body at an inclination angle so as to prevent the geotextiles from generating chemical siltation and ensure that the dam body can drain normally. The chemical siltation resisting drainage device has the advantages of simple structure, high effectiveness, low cost and convenient use, and ensures that the geotextiles do not alternate between saturation and nonsaturation, thus preventing the geotextiles from generating chemical siltation. By using the chemical siltation resisting drainage device, the drainage capability of the dam is reinforced, thus ensuring smooth drainage, reducing the seepage line of the dam effectively and accordingly lowering the operation risk of the tailing dam.

The invention discloses a network type seepage discharging device in the transverse direction, the longitudinal direction and the vertical direction. The network type seepage discharging device comprises vertical seepage collecting bodies, a horizontal transverse seepage collecting body, horizontal longitudinal seepage discharging pipes and a longitudinal flow guiding pipe. A seepage discharging structure of a single node is composed of each vertical seepage collecting body and the corresponding horizontal longitudinal seepage discharging pipe; the horizontal transverse seepage collecting body is connected with the seepage discharging structures of the nodes in the same layer in series, so that a linear seepage discharging structure of each elevation is formed; the linear seepage discharging structures of the elevations are connected in series through the longitudinal flow guiding pipe, so that the network type seepage discharging device is formed in the transverse direction, the longitudinal direction and the vertical direction. According to the network type seepage discharging device in the transverse direction, the longitudinal direction and the vertical direction, seepage discharging is conducted in a combined mode in three directions, a combined type automatically-flowing seepage discharging whole body is formed, the air resistance is small, the seepage permeability is good, washing and dredging are convenient, following maintenance is convenient, the network type seepage discharging device in the transverse direction, the longitudinal direction and the vertical direction is economical, durable, suitable for various solid waste field accumulation bodies of upstream damming and capable of achieving the purpose of effective reduction of an accumulation body seepage line and guaranteeing the operation safety of a dam.

The invention belongs to the field of metallurgical mines, and particularly relates to a water-saving tailing discharge method. A place is selected according to the tailing pond address selection principle. A tailing pond, a primary dam, a floodwater drainage system, a seepage drainage system, a tailing conveying system, a tailing classification and condensation system, a water return system and other matched facilities are reasonably arranged according to terrain and geological conditions. The tailing conveying system comprises a section from a dressing plant to a hydrocyclone, a section from the hydrocyclone to a thickener, and a section form the underflow of the thickener to the tailing pond. Pumping or self-flowing conveying can be adopted for the conveying process of each section. The tailing classification and concentration involves the steps that ore pulp coming from the dressing plant is classified through the hydrocyclone; and overflow tailing ore pulp of the hydrocyclone is concentrated through the thickener. The water return system comprises a thickener overflow water return system and a tailing pond water return system. Return water can be conveyed to the mineral processing process to be recycled in a pumping or self-flowing conveying manner. The tailing pond formed through the method is good in anti-seismic property, high in return water utilization rate, low in dam body seepage line, large in anti-slide buckling safety factor, wide in application range and low in operation and management expense.

The invention discloses a window-type drainage well and a construction method of the window-type drainage well. The window-type drainage well comprises a well casing and a well base. The well casing is provided with a well wall. The well wall is provided with a drainage window. The inner wall of the drainage window is of a circular truncated cone shape. The drainage window is provided with a reducing pipe. The outer wall of the reducing pipe is matched with the inner wall of the drainage window. A cage is arranged in an inner cavity of the reducing pipe and matched with the inner wall of the reducing pipe, the cage is filled with a filtering device, and a first ring flange is arranged on the outer side of the reducing pipe. The first ring flange is connected with a second ring flange, and the second ring flange is connected with a seepage collection device. Or a blind ring flange is fixed on the first ring flange. The construction method of the window-type drainage well comprises the steps of excavating to form a well base foundation, manufacturing the well base, manufacturing the well casing, placing the cage, the filtering plate, coarse sand bags and gravel bags in the reducing pipe, wherein the coarse sand bags and the gravel bags are wrapped in geotechnical cloth, and connecting the first ring flange with the second ring flange or the blind ring flange. According to the window-type drainage well and the construction method of the window-type drainage well, a window can be blocked off, and the window-type drainage well can be further transformed into a seepage collection well; the window-type drainage well is flexible in use and capable of integrating two functions, thereby reducing investments.

The invention discloses a three-dimensional tailing pond seepage system and a seepage method thereof, and the system and the method are used for solving the problem of common tailing pond seepage effect in the prior art. The three-dimensional tailing pond seepage system comprises a flexible permeable hose vertical to a dam axis and a horizontal drain pipe parallel to the dam axis, wherein the inner end of the flexible permeable hose is communicated with the horizontal drain pipe. The flexible permeable hose, the horizontal drain pipe, a bank slope seepage body and a pond bottom seepage body are utilized for collecting water or separately collecting water, and water in the seepage system is guided out of a dam. The system can be used for cleaning and dredging, can be arranged and built in a tailing pond design stage and constructed in an operating stage, can be used for thoroughly solving the tailing pond seepage problem from the design, construction and operating stages, and is good in seepage effect, convenient in maintenance management, economical and durable.

The invention discloses a superfine particle tailing reservoir heightening and capacity expanding stacking-discharging structure capable of achieving one-time dam building by adopting a center line method. The structure is formed by combining an original tailing blocking dam (1), a dam abutment flood intercepting trench (12), a first-stage heightening dam body (2), a second-stage heightening dam body (3), a third-stage heightening dam body (4),..., and an nth-stage heightening dam body; a row of medium-coarse tailing drainage blind drains (9) which are parallel to one another and perpendicularto the axis of the corresponding dam body are constructed in the portion on the top layer of each stage of heightening dam body; draining communication pipes (7) and underground water collecting pipes (11) are laid; drainage floral tubes (8) are buried in the medium-coarse sand drainage blind drains (9); and layers of high-strength anti-corrosion geogrid (6) are laid every 0.5-1.0 m of verticalinterval. According to the invention, solidification of fine particle tailings is accelerated, the mechanical strength index of the fine particle tailings is improved and increased, thus, the capacityof a tailing reservoir is remarkably increased, the production service life is prolonged, and meanwhile, the problems that the capacity of parts of waste dumps are not enough, and mining waste rock is stacked are solved.

The invention discloses a tailings pond flood drainage system for draining in advance efficiently and prolonging a clarification distance. The tailings pond flood drainage system comprises a draining well and a flood drainage pipe, wherein the draining well comprises a well base, a headframe and an arched cover plate, the well base is provided with a casing pipe, a water inlet is formed in the headframe, the casing pipe is connected to the flood drainage pipe, a water inlet hole is formed in the top part of the flood drainage pipe, and non-woven geotechnical cloth wrapped concrete plug is used for blocking, so that inflow elevation of the water inlet hole of the flood drainage pipe is improved. The flood drainage system has the advantages as follows: 1) water drainage can be done in advance through a prepared hole of the flood drainage pipe based on a demand in the early period of the operation of the tailings pond, so that the purpose of accelerating solidification of tailings of a fill dam is realized; 2) water drainage can be done through the prepared hole of the flood drainage pipe based on a demand in the middle and later periods of the operation of the tailings pond, so that the purpose of prolonging the clarification distance of drained water outside the tailings pond, improving the clarification effects and reducing the environmental pollution is realized; 3) the blocking construction of the prepared hole of the flood drainage pipe is convenient, fast and economic.

The invention relates to a damming method of a tailing subdam and belongs to the technical field of mine dam construction. The damming method comprises the steps: firstly, designing the slope of a tailing fill dam and the height of the subdam by adopting a conventional method, and designing the positions and the quantity of draining well pillars according to seepage and stability calculation; when tailings are piled up to the elevation of the top of a starter dam, performing paying-off location on the subdam and determining the mounting starting point position of the subdam which is composed of prefabricated parts; mounting the prefabricated parts by an all-stretcher bonding method; next, backfilling soil in the chamber of the prefabricated parts; when the elevation of the subdam reaches the predetermined elevation of each draining well pillar, nesting the prefabricated part in the corresponding position to the draining well pillar until the subdams in a whole tailing piling storage area are completely built. The damming method provided by the invention avoids the problems of heavy sand blowing of fine-particle tailings and unsmooth drainage in a dam body, and is advantageous for effectively reducing the seepage line; furthermore, the safety of a tailing warehouse is ensured; as a result, the prejudice that the fine-particle tailings are not suitable for direct damming in the prior art is overcome; at the same time, the damming method of the tailing subdam is simple, convenient, quick, stable and safe, and also capable of beautifying the environment.

The invention discloses a framework type seepage drainage system and a method, and belongs to the field of sewage drainage in a tailing pond, which aims at solving the problem of difficulty in drainage of tailing water in the tailing pond. The framework type seepage drainage system is characterized in that a framework seepage drainage body is arranged in the tailing pond, and is formed by connecting a column type seepage drainage pipe on the vertical direction and a beam type seepage drainage on the horizontal direction through a connector; seepage drainage holes are uniformly distributed in the column type seepage drainage pipe, and water seepage holes are uniformly distributed in the upper half part of the beam type seepage drainage pipe; a geotechnical cloth is coated at the outer sideof the beam type seepage drainage pipe. The framework type seepage drainage system has the advantages that the occurrence of dam collapse accidents is prevented, the safety of lives, properties and existing facilities at the downstream zone is guaranteed, and the serious environmental pollution is prevented.

The invention relates to a tubular microporous tailing damming method which comprises the following steps of: manufacturing an ore drawing tube: by using a middle and small diameter tube as the ore drawing tube, discontinuously drilling to evenly distribute ore drawing holes on the lower side of the ore drawing tube in the opposite directions; installing an ore drawing tube support: arranging the ore drawing tube on a dry inner-store beach, wherein the ore drawing tube support is installed by a preset distance and fixed on the dry inner-store beach; installing the ore drawing tube support: installing and fixing the manufactured ore drawing tube on the ore drawing tube support; adjusting the ore drawing holes: opening and clogging the ore drawing holes as required during ore drawing; and damming: depositing tailings to form high-strength sub dams connected with the initial dam during ore drawing. The invention has the characteristics of large dry beach slope ratio, large particle size of tailing deposited in front of the dam, high strength, good water drainage effect, low dam body seepage line, long effective dry beach, huge safe freeboard and good safety, and the method is applicable to ore drawing damming of middle and small tailing stores.

According to the method for reducing the wetted surface of the dam slope of the mud-containing interlayer tailing dam, the drill holes are vertically formed in the dam body, penetrate through the mud interlayer and extend to the drainage lens body at the bottom of the dam body, and the non-fine concrete water permeable pipes are installed and wrapped with the anti-corrosion inverted filter geotechnical cloth to prevent the water permeable holes from being blocked; the non-fine concrete permeable pipe penetrating through the mud interlayer can quickly drain water in the mud interlayer to the bottom of the dam body, and the water is discharged into a confluence area under the dam through the drainage lens body. Water in the mud interlayer can rapidly infiltrate downwards through the non-fine concrete permeable pipe, so that the infiltration line of the dam body is effectively reduced, and the stability of the dam body is improved.

The invention provides a concrete face rockfill dam isolating layer construction method. The concrete face rockfill dam isolating layer construction method comprises the following steps of: (1) preparing powder-emulsified asphalt mortar on the scene; (2) filtering the powder-emulsified asphalt mortar to remove glue residues for later application, continuously stirring, and storing for 1.5 hours after stirring; and (3) conveying the powder-emulsified asphalt mortar to a working face through a conveying hose, spraying the powder-emulsified asphalt mortar onto a protective surface through a spraygun at the working pressure of 0.8-1.2MPa to form a semi-rigid isolating layer, and separating the protective surface from a concrete face by the semi-rigid isolating layer which has the effects of lubrication and seepage control. The face rockfill dam upstream protective surface isolating layer construction method is simplified; and the concrete face rockfill dam isolating layer construction method improves the gluing quality of the isolating layer and the protective surface, has a good effect of separating different layers and reduces the restraint stress of the face and the generation of concrete face cracks.

The invention discloses a reinforcing and surcharge structure used for preventing a deep soft foundation dump against floor heave and instability. The reinforcing and surcharge structure used for preventing the deep soft foundation dump against floor heave and instability is composed of a vertical-horizontal consolidated drainage system and a hierarchical surcharge preloading and counter pressingsystem. The vertical-horizontal consolidated drainage system is jointly composed of gravel piles (3), geotextile (2) and a gravel cushion layer (1). The hierarchical surcharge preloading and counterpressing system is located on the upper part of the deep soft foundation gravel pile vertical-horizontal consolidated drainage system and adopts large stone blocks, gravel and or broken stone materials to conduct graded surcharge preloading. According to the reinforcing and surcharge structure used for preventing the deep soft foundation dump against floor heave and instability, an effective drainage channel can be provided for saturated silts and other fine particle materials scoured on the downstream side of the dump, the internal drainage time of the soft foundation is shortened, consolidation of the saturated soft foundation is accelerated, the rock-soil mechanics index and bearing capacity of the base soft foundation are improved, the stability of the bearing capacity of the soft foundation in the surcharge preloading process is effectively improved and controlled, the internal floor heave is prevented, and settlement due to uneven inner stress is prevented.