Abstract: A device and method for testing the working performance of an anchor rod cable by simulating stratum fracture and separation on the basis of electromagnetic action, applicable to the technical field of testing working performance of anchor rod cables by simulating a tunnel field. The device comprises a top base (1) and a bottom base (2); a plurality of hydraulic vertical columns (3) are provided between the top base (1) and the bottom base (2); the plurality of hydraulic vertical columns (3) are provided thereon with clamping devices, and an electromagnetic block (9) is disposed between two groups of drawing block-shaped clamp holders (4).

Abstract: A method for operating a continuous mining machine having a device continuously providing provisional roof support, wherein the mining machine a rolling roof-protection portion which is fixed on a main machine frame of the continuous mining machine via a front column structure and a rear column structure. While the machine is cutting, the roof-protection device performs continuous load holding on a roof, and after cutting, performs support operations, thereby achieving simultaneous performance of cutting and support operations, and improving tunneling efficiency. Different support strengths are configured according to the hardness, completeness, and quality indicators of rock on a mine roof, such that the device is able to effectively support the roof.

Abstract: A steel belt conveying apparatus includes upper and lower horizontal conveying portions, left and right inclined conveying chains, a connecting rod frame, an inclined frame, a drive portion, and a height adjustment cylinder. The left inclined conveying chain is separately connected to the upper and lower horizontal conveying portions. The right inclined conveying chain is separately connected to the upper and lower horizontal conveying portions. A top portion of the connecting rod frame is hingedly connected to an upper horizontal frame of the upper horizontal conveying portion. A bottom portion is hingedly connected to a lower frame of the lower horizontal conveying portion. A top portion of the inclined frame is hingedly connected to an upper horizontal drive shaft of the upper horizontal conveying portion, and a bottom portion is hingedly connected to a lower horizontal drive shaft of the lower horizontal conveying portion.

Abstract: Disclosed are an aromatic acetylene or aromatic ethylene compound, an intermediate, a preparation method, a pharmaceutical composition and a use thereof. The aromatic acetylene or aromatic ethylene compound has a significant inhibitory effect on PD-1 and PD-L1, and can effectively relieve or treat cancers and other related diseases.

Abstract: An apparatus for controllably unfolding a flexible mesh for a continuous miner includes a mesh roll storage rack, a height adjustment post, a mesh rolling shaft and a flexible mesh. The flexible mesh includes a mesh roll and an unfolded mesh. The mesh roll and the unfolded mesh are an integrated structure. The mesh roll is located on the mesh roll storage rack. The unfolded mesh is clamped on the mesh rolling shaft, and is pressed on a cut un-supported tunnel roof via a roof bolt. The mesh rolling shaft is rotatably connected to a top portion of the height adjustment post. The mesh roll storage rack and the height adjustment post are both mounted on the continuous miner. The mesh rolling shaft is located at a back end of the mesh roll storage rack. A limit mechanism and a damping mechanism are disposed on the mesh rolling shaft.

Abstract: Disclosed in the present invention is an aminopyrimidine five-membered heterocyclic compound, and an intermediate, preparation method, pharmaceutical composition and application thereof. The aminopyrimidine five-membered heterocyclic compound provided by the present invention has a significant antagonistic effect on adenosine A2A receptors, and may be used as an antagonist for adenosine A2A receptors to effectively relieve or treat immune tolerance, diseases of the central nervous system, inflammatory diseases and like related diseases, while the preparation method is simple.

Abstract: A steel belt conveying apparatus includes upper and lower horizontal conveying portions, left and right inclined conveying chains, a connecting rod frame, an inclined frame, a drive portion, and a height adjustment cylinder. The left inclined conveying chain is separately connected to the upper and lower horizontal conveying portions. The right inclined conveying chain is separately connected to the upper and lower horizontal conveying portions. A top portion of the connecting rod frame is hingedly connected to an upper horizontal frame of the upper horizontal conveying portion. A bottom portion is hingedly connected to a lower frame of the lower horizontal conveying portion. A top portion of the inclined frame is hingedly connected to an upper horizontal drive shaft of the upper horizontal conveying portion, and a bottom portion is hingedly connected to a lower horizontal drive shaft of the lower horizontal conveying portion.

Abstract: Disclosed are a salt of a fused ring pyrimidine compound, a crystal form thereof and a preparation method therefor and the use thereof. The fused ring pyrimidine compound is N-[7-(4-fluoro-2-methoxyphenyl)-6-methylthieno[3,2-d]pyrimidin-2-yl]-1-(piperidin-4-yl)-1H-pyrazol-4-amine, having a structure as shown in formula 1. The preparation methods in the invention for the salt of the fused ring pyrimidine compound and the crystal form thereof are simple; and the salt of the fused ring pyrimidine compound and the crystal form thereof at least have the characteristics of having a better stability, not easily absorbing moisture, being of a polycrystalline type, having a chemical stability and pharmacokinetics, and having an improved solubility.

Abstract: The present invention relates to a clean and efficient coal mining method, which is applicable to the field of solid waste treatment in mines.

Abstract: Disclosed in the present invention are an aromatic vinyl or aromatic ethyl derivative, a preparation method therefor, an intermediate, a pharmaceutical composition, and an application. The aromatic vinyl or aromatic ethyl derivative in the present invention is as represented by general formula (I). The aromatic vinyl or aromatic ethyl derivative in the present invention has an obvious inhibitory effect on PD-1/PD-L1, is a very effective small-molecule PD-1/PD-L1 inhibitor, and can effectively alleviate or treat relevant diseases such as cancer.

Abstract: A reaming and self-rotating anchor rod includes a rod body, a drill bit, a connecting member, a tray, and a nut. One end the connecting member is snap-fixed to the tail part of the rod body, the other end of the connecting member is connected to an anchor rod bolter. The rod body has an annular protrusion at its middle part to block powder so that the powder fills up the clearance between the rod body and the coal mass. The drill bit has female threads and can be screwed into the front part of the rod body, and the drill bit has baffle pawls and spiral grooves on its side surface.

Abstract: Disclosed are an integral clamping steel strand drawing test apparatus, and a method for using same, wherein same are suitable for use in a steel strand mechanical property test. The apparatus comprises a rectangular lower base (13) and a rectangular upper base (14), with a hydraulic telescopic mechanism being provided between the lower base (13) and the upper base (14), the hydraulic telescopic mechanism being provided with an integral clamping mechanism, a steel strand test piece (4) to be tested being provided in the integral clamping mechanism, the steel strand test piece (4) to be tested being provided with a plurality of binding protective devices (2), and a safety protection door (16) being provided outside the hydraulic telescopic mechanism.

Abstract: Provided is a mounting method for an extensible reaming self-anchoring anchor rod, which is especially applicable to roadway construction in coal mines. A big helical structure is arranged on two rod sections of a sectional type anchor rod, a simple drill bit drills and reams a bore and cuts the coal mass in one operation, the outer diameter of the simple drill bit is smaller than the outer diameter of the big helical rod body, and the big helical structure accomplishes secondary reaming, self-drilling and self-anchoring in the drilling process; the big helical structure inhibits propagation and development of sheet cracks of the coal wall in the radial direction, and is embedded in the coal mass through a self-stabilization process of the rock mass.

Abstract: The present invention provides a reaming and self-rotating anchor rod and a construction method using the reaming and self-rotating anchor rod, which are applicable to supporting for quick tunneling of coal roadways.

Abstract: Provided is a mounting method for an extensible reaming self-anchoring anchor rod, which is especially applicable to roadway construction in coal mines. A big helical structure is arranged on two rod sections of a sectional type anchor rod, a simple drill bit drills and reams a bore and cuts the coal mass in one operation, the outer diameter of the simple drill bit is smaller than the outer diameter of the big helical rod body, and the big helical structure accomplishes secondary reaming, self-drilling and self-anchoring in the drilling process; the big helical structure inhibits propagation and development of sheet cracks of the coal wall in the radial direction, and is embedded in the coal mass through a self-stabilization process of the rock mass.

Abstract: Disclosed are a condensed-ring pyrimidylamino derivative, a preparation method therefor, and an intermediate, a pharmaceutical composition and applications thereof. The method for preparing the condensed-ring pyrimidylamino derivative comprises: in a solvent, in the presence of a palladium-containing catalyst, allowing a compound represented by formula I-a and a compound represented by formula I-b? to have a coupling reaction, and then preparing a compound represented by formula I by means of a deprotection reaction. Also disclosed applications of the condensed-ring pyrimidylamino derivative in the preparation of drugs for preventing, relieving and/or treating tumors or diseases caused by an anaplastic lymphoma kinase. The condensed-ring pyrimidylamino derivative of the present invention has an obvious restraint effect on the anaplastic lymphoma kinase.

Abstract: Disclosed in the present invention is an aminopyrimidine five-membered heterocyclic compound, and an intermediate, preparation method, pharmaceutical composition and application thereof. The aminopyrimidine five-membered heterocyclic compound provided by the present invention has a significant antagonistic effect on adenosine A2A receptors, and may be used as an antagonist for adenosine A2A receptors to effectively relieve or treat immune tolerance, diseases of the central nervous system, inflammatory diseases and like related diseases, while the preparation method is simple.

Abstract: Disclosed area fused ring pyrimidine compound, and an intermediate, a preparation method, a composition and a use thereof. The fused ring pyrimidine compound is a compound as shown in formula I, a tautomer, an enantiomer, a diastereoisomer, a pharmaceutically acceptable salt, a metabolite, a metabolic precursor or a prodrug thereof, wherein the above-mentioned compound is used for the preparation of a medicine for preventing, remitting or treating one or more of immune system diseases, autoimmune diseases, cell proliferative diseases, allergic disorders and cardiovascular diseases, and the compound has a strong inhibitory effect on the Janues kinase, FGFR kinase, FLT3 kinase and Src family kinase.

Abstract: The present invention provides a self-drilling and self-anchoring extendable anchor rod applicable to soft and weak coal rocks and an anchoring method thereof, which are suitable for supporting soft and weak coal rock mass in roadways.

Abstract: Disclosed are an aromatic acetylene or aromatic ethylene compound, an intermediate, a preparation method, a pharmaceutical composition and a use thereof. The aromatic acetylene or aromatic ethylene compound has a significant inhibitory effect on PD-1 and PD-L1, and can effectively relieve or treat cancers and other related diseases.