60results about How to "Save filling material" patented technology

The invention discloses an underground selection, screening and stirring integrated gangue cementation construction filling system and method. The system comprises an underground coal and gangue separating device, an underground gangue crushing and screening device, an underground filling material weighing and stirring device, an underground filling material slurry conveying device, an underground filling material slurry casting device and a PLC control device. The filling method comprises the steps that raw coal mined from a driving working face and a mining working face is transported to a raw coal bunker of a mining area, separated clean coal is transported to a clean coal bunker and is lifted by a main well, separated gangues are fed into a gangue crushing machine, and the gangues undergoing secondary smashing are fed into a gangue screening device; various raw filling materials are respectively fed into a burdening hopper, and filtered mine water is added to obtain filling material pulp through stirring after even and drying stirring; the filling material pulp is transported to a filling working face by a stirring transportation truck, then is cast into a filling formwork by a movable filling pump truck and is evenly vibrated by using a vibration device. By adopting the system and method, the mine transportation and lifting pressure is reduced, the working efficiency is improved, and the mining-filling balance of coal mine waste is achieved.

The invention discloses a method for filling a friction stir welding keyhole by using a T-shaped filling block and a bitless stirring head. The method comprises the following steps of: (1) performing chambering on the upper part of the friction stir welding keyhole, machining to form a table conical shape of which the upper side is wide and the lower side is narrow, and precleaning the inner wall of the friction stir welding keyhole; (2) preparing the T-shaped filling block; (3) prearranging the T-shaped filling block in a table conical hole, so that a T-shaped endshield is exposed with a certain height; (4) starting the bitless stirring head to rotate and press, so that the T-shaped filling block is subjected to rotary extrusion towards the keyhole; (5) when the stirring head is pressed to be flush with upper surfaces of workpieces to be subjected to repair welding basically, performing in-situ friction for a certain time; and (6) removing trimmings, so that the filling surface is smooth and beautiful. The method has the advantages that: tools (bitless tools) are easy to design and manufacture, the tools are not needed to be replaced when the keyholes are repaired in batch, the filling material is saved, the keyhole is not thinned or is thinned slightly after being welded, and membranes of the side wall and the bottom are well removed, so that the side wall and the bottom can be combined compactly. The method also can be used for repairing defects of casting surfaces and weld joints.

The invention discloses an extra-thick coal seam stratified non-integral filling mining method. The extra-thick coal seam stratified non-integral filling mining method is used for mining "three-lower"extra-thick coal seam and stratifying synthetically by combing coal quality property and devices, and the stratified height is determined; then methods of upper room column non-integral filling recovering coal pillar and lower strip-type filling and mining are used, coal seams are sequentially mined by the two methods, and the upper layer is mined firstly then the lower layer is mined until the whole layer of coal are mined completely. The extra-thick coal seam stratified non-integral filling mining method makes good use of coal seam instead of artificial false roof, the material wastage is greatly reduced, a filling method realizes non-integral filling, and filling materials are saved; a method of combing mining and filling is realized in the process of mining, in the absence of a coal pillar, solid cemented filling materials are quickly used instead of the coal pillar, sharp change of overlying rock is strictly controlled, the safety of ground buildings is ensured, and the upper andlower structures are matched to control ground depression.

The invention discloses a method for conducting goaf partial filling according to ground surface subsidence characteristics. The method comprises the steps that the positions of filling bodies are designed according to a ground surface subsidence contour map; complete filling is conducted within a central area range, and a subsidence center is controlled; multiple circles of filling strips are arranged outside the complete filling range, and a larger subsidence region is controlled; multiple rows of filling monomers are arranged outside the filling strips, and a subsidence edge region is controlled; the filling bodies with different shapes are arranged in a goaf in a targeted mode, deformation destruction and ground surface subsidence of a roof are controlled, a filling body-roof structure control system is formed, and deformation destruction and ground surface subsidence of an upper overlying strata are controlled; narrow filling strip goaf-side retained roadways are arranged, the roadway driving workload of the next working face is reduced, and the goaf is filled in a sealed mode. According to the method for conducting goaf partial filling according to the ground surface subsidence characteristics, deformation destruction and ground surface subsidence of the roof can be effectively controlled, the recovery rate of coal mining under buildings, railways and water bodies is increased, and the environment is protected; filling materials are saved, the filling cost is reduced, and a large amount of underground space formed through filling is reused.

The invention provides an interval skip-mining type filling coal mining method and belongs to the technical field of coal mine filling coal mining methods. The interval skip-mining type filling coal mining method comprises the steps that a first open-off cut is dug at the tail end of a butt entry, a second open-off cut is dug a certain distance away from the first open-off cut, and mining is conducted at the position of the second open-off cut with the wall type system coal mining method after the second open-off cut is well dug; a third open-off cut is dug a certain distance away from the second open-off cut, a gob formed after mining is conducted at the position of the second open-off cut is filled while the third open-off cut is dug, and the rest operation is conducted by analogy till mining is conducted on a mining stopping line. By the adoption of the interval skip-mining type filling coal mining method, mining can be conducted under the condition that the two ends are supported, sequential mining and sequential filling are achieved, the integrity of a base plate of a roof is guaranteed, movement of overlying rock is reduced, and the purpose of surface subsidence control is achieved; after mining with filling is completed, coal pillars left after mining do not need to be filled, filling materials are reduced, and filling cost is reduced.