35results about How to "Improve the top rate" patented technology

The invention discloses a method for comprehensive filling and roofing of a mining approach, comprising: downhill construction of each mining approach, raising the roof at the head of the mining approach to form a sand chamber, and at the same time raising the roof at the entrance of the mining approach And erect the upper open filling retaining wall, the filling pipeline enters the mining approach from the top of the filling retaining wall, and erects along the roof of the mining approach to the sand chamber; when the mining approach is connected to the roof and filled, the natural slope of the mining approach roof is used and the slurry pressure in the filling pipeline to realize the filling and roofing. For the local uneven roof area, the local roofing is realized by the vibration of the filling pipeline; when the roof is filled, the roofing situation is easy to observe, and the filling and roofing process is simple. The cost is low, the requirements for filling the retaining wall are low, and the safety is good, which is convenient for popularization and application.

The invention relates to the technical field of combustion water heaters, and relates to a roof contact method for stope filling. The roof contact method for the stope filling comprises the followingstep that a stope empty area is filled with slag to a certain height to obtain a residual empty area, the height of the residual empty area is measured, the position of the highest point is determined, a hollow anchor rod is installed at the highest point, and a filling pipe is installed on the hollow anchor rod; a first dewatering pipe and a dewatering pipe are installed at the highest point, anda third dewatering pipe and a second dewatering pipe are installed from top to bottom according to the height difference; and the opening between the residual empty area and an inlet or a connectingchannel is blocked, and then filling slurry is conveyed into the filling pipe to realize roof-contacted filling of the residual empty area. The roof contact method for the stope filling has the characteristics of realizing effective roof-contacted filling of the stope empty area, and effectively ensuring the strength of the stope empty area.

The invention discloses a stack column type filling formwork and a using method thereof. The stack column type filling formwork is arranged below a top plate, supporting frames spliced together define a cuboid frame structure on the periphery, single supporting frames or integrated bodies formed by single-side-spliced supporting frames are arranged on the two opposite faces of the formwork respectively, and every two adjacent faces are formed by perpendicularly splicing supporting frames at the edges. Each supporting frame is composed of a baffle, framework sleepers and counter-pulled anchor ropes, wherein the framework sleepers are composed of a plurality of parallel transverse sleepers and three parallel vertical sleepers, the transverse sleepers and the vertical sleepers are arranged in a perpendicularly crossing mode, and the counter-pulled anchor ropes are arranged on the vertical sleepers in the formwork center on each side. The framework sleepers make direct contact with the top plate after being spliced to support the top plate. A filling opening is formed in the upper portion of the part, on one side of the formwork, of the baffle. After filling of the formwork, the overall compressive strength of filling columns is improved, the later compression amount of the filling columns is reduced, and the top sinking amount is reduced.

The invention discloses a method for mixing and filling gangue and high-water materials, which utilizes the high-water materials to supplement the filling gaps of the gangue, thereby achieving compactfilling and bearing a top plate of a goaf. The method comprises the following steps: step 1), a filling retaining wall is arranged on one side of a working face transportation roadway in a way of filling the high-water materials in bags after a filling connection roadway is dug and mined based on a long wall production system; step 2), high-water material filling pipelines is arranged on two sides of the filling connection roadway and the top plate; step 3), the gangue is thrown to the goaf; step 4), a high-water filling material retaining wall is arranged on one side of a working face returnairway after the gangue is thrown, an overflow hole is reserved, and the high-water filling materials are injected into the goaf for filling through reserved filling pipelines; step 5), the reservedoverflow hole is detected. Slurry overflow indicates that the filling is completed and stopped; step 6), the next mining and filling cycle is carried out at an interval of three filling connection roadways and coal pillars. The method effectively reduces the ground surface subsidence value of the mining area of the working face, and simultaneously greatly improves the roof connection rate and thecompactness of the filling body of the goaf.

The invention discloses an environment-friendly handling method for an abandoned underground air raid shelter. The environment-friendly handling method is characterized by comprising the following steps that before filling, after field accumulated water is pumped and ventilation arrangement is completed, a curing agent is sprayed onto sludge from outside to inside in the channel direction, a powerful stirring head and a high-pressure water gun are combined and adopted to stir the sludge on site, and consolidated soil is formed; then, filling units are divided from inside to outside in the channel direction, a drill bit is adopted to drill the ground at the two ends of each unit downwards to penetrate through the arched top of the air raid shelter, light aggregate concrete is poured throughguide pipes, and end sealing walls are formed; the positions nearby the middles and two ends of the filling units are drilled to form filling holes and observing holes; finally, filling is conductedfrom bottom to top through the filling holes between every two sealing walls, the periphery and the top is subjected to filling in sequence, and materials are filled gradually from the low portion tothe high portion; and after the unit is filled, filling of the next unit is conducted. The environment-friendly handling method has the advantages that the strength of the filling body is improved, the filling effect is improved, disturbance to surrounding buildings is effectively controlled, the construction environment pollution is reduced, and visualization of the filling process is achieved.

The invention relates to the technical field of mine filling materials, in particular to a wet ash discharge-based filling material and a preparation method and application thereof. The filling material includes the following components: 50-150 parts of gel material, 10-20 parts of activator, 2-5 parts of water retention and dispersant, 0.5-1.5 parts of water reducing agent, 0.5-1.5 parts of air-entraining agent, and swelling agent 0.5-1.5 parts; wherein, the gel material is composed of the following components by weight: 60-80 parts of wet fly ash, 10-20 parts of dry fly ash, and 10-20 parts of cement. In the present invention, wet discharge fly ash is used as the main gel material, and dry discharge fly ash and cement are used as auxiliary gel materials. A mine filling material with high stone body strength, good fluidity, good water retention, good suspension and dispersion, micro-expansion, easy transportation, low cost, environmental protection and energy saving is prepared.

The invention provides a new method for mining an open-pit mine sidewall mineral below construction. The new method comprises: dividing each ore layer of the open-pit mine sidewall mineral below construction into a plurality of linear mining caverns along the inclination or trend of an ore body according to set width and height, and numbering in sequence; using mining equipment to first mine odd or even mining caverns, reserving odd or even mining caverns between even or odd mining caverns as ore pillars, performing mining-filling parallel operation on even or odd mining caverns, and filling the mined mining caverns in sequence after satisfying a filling space; when fillings in two adjacent mining caverns are solidified, then mining a mining cavern between the two adjacent mining caverns,and also performing mining-filling parallel operation on mining caverns to be mined later until multi-segment mining and filling of the various layers and thick ore bodies are completed. The mining method provided by the invention improves the strength of supporting a sidewall, reduces the risk of sidewall collapsing and landslide, has a high mineral recovery rate, and reduces pollution to environments such as atmosphere and soil.

The invention discloses an optimization method of a phosphogypsum-based cementitious material that improves the rate of filling and roofing. In the method, different ratios of phosphogypsum powders and activators are added to the filling aggregate to make cemented fillings with different ratios. Carry out the cemented filling body strength test and the filling body expansion rate test for the cemented filling body materials of different proportions, and obtain the test data of the cemented filling body strength and expansion rate of the cemented filling body materials with different proportions; adopt the quadratic polynomial Carry out stepwise regression analysis on the test data of the strength and expansion rate of the above-mentioned cemented filling body; take the 3d strength of the cemented filling body as the optimization goal, and take the 28d filling body expansion rate as the constraint condition, establish the ratio optimization model of the cementitious material; solve According to the above optimization model, the optimal proportion of the phosphogypsum-based cementitious material in the filling slurry can be obtained. This design method can realize low-cost and high-value resource utilization of phosphogypsum; it can realize low-cost and high-value utilization of phosphogypsum in filling mining.

The invention provides a proportion optimizing method of a phosphogypsum-based all-solid waste filler for improving a roof-contacted filling rate, and belongs to the technical field of environment-friendly filling mining. The method comprises the following steps: firstly performing mineral analysis and a particle size test on phosphogypsum and low-quality solid waste; performing a strength test and an expansion rate test on a filling body with different proportions of the phosphogypsum-based all-solid waste filler; establishing a strength and expansion rate mathematical model of the filling body based on the test results; establishing a proportion optimization model of the a phosphogypsum-based all-solid waste filler; and finally solving the proportion optimization model to obtain an optimized proportion of the phosphogypsum-based all-solid waste filler. The method makes full use of the self expandability of the phosphogypsum, realizes the proportion optimal combination and synergy ofmultiple low-quality solid waste, can avoid deterioration of the strength of the filling body caused by excessive expansion of the filling body, and can make the swellability of the phosphogypsum exerted to the utmost extent on the basis of meeting the strength of the filling body, thereby improving the roof-contacted filling rate of filling stope.

The invention provides a physicochemical combined roofing method for stope filling, belonging to the technical field of filling. In this method, firstly, according to the actual production situation of the mine, determine the filling process parameters and the physical and mechanical performance indicators of the filling body, select the appropriate type of expansion agent, the amount of expansion agent added, determine the addition method of the expansion agent, and calculate the expansion rate; secondly, according to the structural parameters of the goaf , establish the structure model of the goaf and the three-dimensional rectangular coordinate system, select the calculation parameters of the topping rate and establish the mathematical model; then according to the established mathematical model of the topping rate, through the comparison of different schemes, determine the number of cutting points and two The distance between the blanking points; finally arrange the pipeline, and perform filling and topping. The method combines the multi-point cutting method (material) and the adding expansion agent method (chemical) to form a high-quality and high-efficiency filling and topping method, which is safe, reliable, low in cost, and can control and adjust the topping rate. Topping work for various mining methods.

A segmented sealing device for strip partial filling mining and its use method, belonging to the field of coal mining methods, can solve the problem of complicated sealing process, loose sealing, poor roofing effect, Due to the low filling rate of the level roadway, high labor intensity, poor solidification conditions due to the closed filling body during the condensation process and no ventilation, and only suitable for one-side or two-end sealing, etc., the roadway is divided into several sections for filling, and different specifications and layers are used. The I-shaped formwork, end formwork and side formwork are connected by bolts as the sealing device of the filling body. At the same time, the original top anchor and the new bottom anchor method of the roadway are used to connect the mine-used ordinary steel strands to the top, bottom anchor and I-shaped formwork, side formwork and end formwork are tightened to strengthen and fix the formwork. The method is effectively combined with the roadway paste filling process, and the installation and disassembly are convenient, the formwork can be reused, and the use is flexible. It is a reliable, economical and advanced method.