30 results about "Columnar jointing" patented technology

The invention discloses a preparation method for a transparent columnar jointed rock test sample based on a 3D printing technique. The method comprises the following steps: S1, acquiring physical properties of a columnar jointed rock; S2, establishing a columnar jointed grid model; S3, printing the columnar jointed grid model; S4, adding a primary jointed face; S5, preparing a columnar jointed test sample; and S6, monitoring inner cracks. The columnar jointed grid is printed through the 3D printing technique, the columnar jointed test sample which is anisotropic and is relatively good in visual degree is prepared by simulating the columnar rock through resin, and the whole preparation process of the test sample does not need polishing and cutting. The method overcomes the homogenization problem caused by the 3D printing of the test sample and the cracking problem of the joint in the polishing process.

The invention discloses a tension experiment device of a columnar jointing structural surface. The tension experiment device comprises a tester base, two screw rods, an adhesion plate and a carrying plate, wherein the two screw rods are arranged on the tester base; two ends of a penetration iron rod are movably connected with the two screw rods respectively; the penetration iron rod penetrates through a cylindrical iron plate; the cylindrical iron plate is connected with an upper-end-surface iron plate; the carrying plate is arranged above the adhesion plate; the adhesion plate is connected with the carrying plate through a connecting rod and is connected with a lower-end-surface iron plate; the upper and lower end surfaces of a columnar jointed rock are adhered to the upper-end-surface iron plate and the lower-end-surface iron plate respectively. The invention also discloses a tension experiment method of the columnar jointing structural surface. The method has the advantages of simple structure and convenience in operation; the tension experiment can be performed on the columnar jointing structural surface effectively and quickly; sample processing is not needed, and breakage or weakening caused by processing of the jointed rock is avoided; the method is suitable for the large-scale rock sample experiment and facilitates the dimensional effect on rock research.

The invention relates to fittings for preparing a cuboid columnar jointing rock test sample. The fittings comprise a first driving plate, a first driven plate, a second driving plate and a second driven plate, wherein two sides of the four components are sequentially connected to form a hollow cuboid structure for holding a columnar jointing rock mold; an inner cavity is formed inside the cuboid structure; the first driving plate and the second driving plate of the hollow cuboid structure can be moved freely. By adopting the fittings, the columnar jointing rack can be prepared, combined, polished and the like, jointing is prevented from damage when a large-size test sample is cut, and meanwhile due to a fastening function of the fittings upon the test sample, the problem that the jointingis cracked in the polishing process is overcome.

The invention discloses a method for preparing an irregular columnar joint rock mass sample with a nested interlayer dislocation zone, which comprises the following steps: making an internal mold according to the structural characteristics of the rock mass at the engineering site, and the internal mold includes a columnar joint structure feature for simulating The three-dimensional polygonal joint surface grid of the joint surface grid is nested with interlayer fault zone simulation components, wherein the joint surface grid is made of water-soluble materials, and the fault zone simulation components are made of soluble materials; Pouring joint column similar material in the joint surface grid, after the final setting, dissolve the joint surface grid with water, then pour joint surface similar material in the dissolved part, and dissolve the staggered band simulation member with solvent after the final setting of the part , and then pour the similar material of the dislocation zone into the dissolved cavity; finally maintain and obtain the sample. This method can simply and conveniently prepare columnar jointed rock mass samples with interlayer dislocation zone, which provides an experimental basis for the study of mechanical seepage and permeability of this type of rock mass.

The invention relates to an in-situ test method for the surrounding rock relaxation depth in a columnar jointing rock mass cavity project. The in-situ test method includes the steps of designing and arranging test drilling holes which are formed in the periphery of a cavity excavated in a columnar jointing rock mass and parallel or perpendicular to the axis of a column body of the columnar jointing rock mass, selecting test projects, determining the relaxation depth, and comprehensively conducting the test. The test drilling holes are distributed in key portions of a monitored fracture surface after the cavity is excavated, surrounding rock elastic waves and jointing fissure characteristics of the monitored fracture surface of the excavated cavity are obtained through an in-situ test means which integrates digital drilling with camera shooting and integrates single hole sound waves with across hole sound waves, and the surrounding rock relaxation depth is comprehensively judged according to reduction of the wave velocity of the sound waves in an unloading relaxation area and the corresponding rock mass fracture condition. The technical scheme is simple, the test means is reliable, comprehensive collection and comparison analysis of columnar jointing rock mass unloading relaxation information are ensured, the surrounding rock relaxation depth is accurately confirmed, the in-situ test method can be widely applied to columnar jointing rock mass excavation and supporting projects such as water conservancy and hydropower projects, traffic projects and underground test site projects.