37results about How to "Large diffusion radius" patented technology

The invention discloses a method for increasing penetration by blasting, which comprises the following steps: (1) drilling a blast hole and a plurality of guide holes distributed around the blast hole; (2) filling explosives into the In the blast hole, wherein, the uncoupling coefficient is 1.5; (3) after blocking the blast hole, the explosives loaded are exploded in one salvo. Further discloses the application of the method for increasing seepage by blasting: it is applied to blasting fracturing of rocks with a hardness of IV; further, it is applied to gas discharge in tunnel construction projects, gas mining in coal mines, and water discharge from rock cracks in construction sites. The blasting seepage enhancement method of the present invention has obvious effect on increasing the penetration of low-permeability coal rocks, is simple and convenient in construction, saves resources, provides guarantee for construction safety, and has a wide range of applications, and can be applied to the extraction and treatment of gas and crack water.

The invention discloses an impulse-type grouting method, and is applicable to general tunnel and roadway support projects. A grouting pipe with the same depth of a drilling hole is inserted into a well-constructed grouting drilling hole, the inner end of the grouting pipe contacts a hole bottom, and the outer end of the grouting pipe is connected with a grouting flexible pipe through a control valve. An impulse-type grouting system is connected on the grouting flexible pipe. A reversing valve ensures that high-pressure thick liquid and low-pressure thick liquid alternatively pass through, and therefore impulse-type grouting is achieved. As grouting time increases, the injecting speed of thick liquid is reduced, changes of a displayed value on a flow meter is observed, and when the thick liquid stops to flow, grouting is stopped. Impulse pressure is utilized to ensure that the thick liquid is provided with larger flow velocity and impact force; the width of an original cranny gap of a rock mass is enlarged, the closed cranny gap is opened, and therefore the number of channels for the thick liquid to pass through is increased, and strong permeation effect is generated; and the diffusion radius of the thick liquid is enlarged to improve filling rates of the gap.

The invention discloses side slope grouting slurry for silty-fine sand embankment widening, prepared from the following raw material in parts by weight: 3-15 parts of water glass, 2-10 parts of acetic acid, 1-5 parts of calcium chloride, 0.2-3 parts of disodium hydrogen phosphate, 0.1-5 parts of ferric trichloride, 0.1-5 parts of aluminum chloride, and 0.1-3 parts of phosphoric acid or sulfuric acid. The side slope grouting slurry for silty-fine sand embankment widening has the advantages as follows: (1) the slurry provided by the invention is good in permeability, large in dispersion radius after grouting, high in grouting reinforcement strength and good in homogeneity, and the gelation time of the slurry in the air and the sand layer is long; (2) the rest materials of the raw materials apart from the acetic acid which is an organic matter are all inorganic matters, and all of the raw materials do not belong to the range of hazardous article control, and may not cause pollution on the surrounding environment in the use process; the by-products of the slurry after solidification reaction also has no pollution on the environment, and is environment-friendly and harmless; and (3) the raw materials are low in price and wide in source.

The invention discloses a deep hole segmented grouting reinforcement device for coal and rock mass and a reinforcement method, comprising a grouting device and at least two groups of grouting pipeline assemblies, wherein the grouting device has a one-to-one matching with each grouting pipe assembly A grouting outlet connected with the inlet end of the grouting pipe assembly for conveying different materials, the outlet end of each grouting pipe assembly is connected with the grouting head, and the grouting pipe assembly can rotate with its own axis to realize the connection with the grouting head. In the present invention, the grouting pipeline assembly can be separated from the grouting head, which facilitates the disassembly of the grouting pipeline and the secondary installation of the grouting head to realize the grouting in the next stage. The grouting range of the structure is optional, which can effectively solve the problem of existing Some shallow hole grouting methods for strengthening coal and rock mass of polymer reinforcement materials have problems such as small effective grouting range, serious grouting phenomenon, and complex grouting construction organization. Difficulty, drilling is difficult to use multiple times and other problems.

The invention provides a water surface dispersing agent. The water surface dispersing agent comprises the following ingredients by weight percent: 30 to 80 percent of polyarylphenol-polyoxyethylene ether phosphate, 10 to 35 percent of a penetrating agent and 10 to 35 percent of a surfactant. The invention also provides a water surface dispersion-type pesticide. The polyarylphenol-polyoxyethylene ether phosphate is adopted as a main component, so that the water surface dispersing agent is good in dispersing effect, the dispersing speed is high and the dispersing radius is large, uniform dispersion can be realized, the effective utilization rate of the pesticide per unit area can be increased, the consumption of the pesticide per unit area can be reduced, and the effective utilization rate of the pesticide can be increased. Meanwhile, the water surface dispersing agent is relatively low in cost. The experimental result shows that the dispersing speed of the water surface dispersing agent can reach 0.3m / s, the dispersing radius can reach 5m to 10m; compared with similar products, the water surface dispersing agent has the advantages that the dispersing speed can be increased by 10 to 20 times and the dispersing radius can be increased by more than 5 times.

The invention provides a grouting curtain drilling structure and a construction process thereof, and relates to the technical field of mine curtain grouting. The grouting curtain drilling structure comprises a plurality of straight grouting holes formed along a curtain line. A plurality of branched grouting holes communicating with the straight grouting holes are further formed in the peripheries, in the height direction, in the straight grouting holes, and the directions of the branched grouting holes radiate and extend towards the peripheries. After grouting, in the curtain line direction, the exposure rate of high-angle water guide cracks can be increased, or water guide cracks in any angle can be exposed. The grouting curtain drilling structure and the construction process have the technical effects that compared with the prior art, the exposure rate of the high-angle water guide cracks can be greatly increased, or the water guide cracks in any angle can be exposed, and therefore the grout dispersion radius is increased, the grouting effect is guaranteed, the number of the straight holes and the drilling workload are greatly reduced, the cost of investment of the mine party is reduced, and great economic benefits and social benefits are achieved. Due to the fact that the distance between the straight holes is increased, it is possible that a tunnel inner curtain grouting manner is adopted for water plugging in mines in lofty mountains and steep hills.

Provided is a rock and earth mass grouting method. By changing the temperatures of different components of grout, the temperature difference between the grout and an injected rock and earth mass is improved, the feature that the fluidity of the grout is enhanced when temperature rises is used, the larger diffusion radius of the grout in a rock and earth mass hole and a fracture is obtained, the injecting feature of the grout in an earth mass and broken rocks is improved, the purpose of grouting effect enhancing is achieved, meanwhile, during the process that the grout seeps and carries out heat conducting in the rock and earth mass, the temperature character of a near rock and earth mass is changed, and the temperature monitoring feature of the grouting diffusion range can be obtained. An active temperature rising method is used for achieving the process, the method is simple, the injecting performance of the grout is improved, meanwhile, the injecting range of the grout has temperature measurability, and certain practicability and promoting value are achieved.

A support method for a coal seam roadway to cross a gob belongs to the technical field of roadway supporting for coal measure strata and utilizes combination of temporary support and permanent support. The support method is characterized in that the temporary support includes applying an alternating-current field after double-slurry is grouted into small ducts, increasing scattering radius of the slurry under electric effect of electro-osmosis and electrophoresis, filling the double-slurry into holes and slits inside regenerated surrounding rock of the gob sufficiently so as to reinforce of the regenerated surrounding rock of the gob again, and finally forming the integrated surrounding rock. The support method aims to increase integral strength, stability and self-bearing capacity of the regenerated surrounding rock of the gob. The integral strength of the regenerated surrounding rock of the gob is increased by at least 230% by using the support method as compared with the existing support method for the coal seam roadway to cross the gob.