16 results about "Rock fragment" patented technology

This invention relates to the field of coal mining technology, and more particularly to a personal protective device (PPE) for underground operations, comprising a drive base, a support frame, a lifting platform, a first protective component, and a second protective component. When in the protective state, the first and second protective components are in contact; when in the working state, they are separated. The advantages are that the cooperation between the drive base and the support frame allows the support frame to move along the length of the drive base; the lifting platform can lift workers to the working position on the tunnel roof, avoiding physical fatigue caused by prolonged overhead work. The first and second protective components can switch between the protective and working states: in the protective state, they are in contact to form a top protective structure, effectively shielding against falling rocks or broken rock fragments from the tunnel roof; in the working state, they are separated to create operating space, facilitating normal roof work for workers.

This utility model relates to the technical field of soil drilling construction, and in particular to a borehole wall protection device for collapsed and fractured rock formations in geological drilling. It includes a jetting cylinder and a rubber plug. The jetting cylinder is fixed at one end in the axial direction, and a reverse drill bit is provided at the other end. Multiple grouting holes are opened on the jetting cylinder. After the grouting device is connected to the drill rod, the rubber plug is in a compressed and expanded state. This utility model can perform wall protection in deeper boreholes, thereby reducing problems such as rock fragments falling out and causing drill bit jamming, and improving the borehole success rate.

This invention relates to the technical field of drilling equipment and its application, specifically a full-well mechanical energy specificity drilling device and its application method based on drilling data. The device includes a cylinder, a drill bit, and a fixed base. A base is mounted on the upper part of the drill bit, and the fixed base is parallel to the outer side of the base. The upper part of the fixed base is fixedly connected to the cylinder via a connecting rod. An inner seat is mounted on the outer side of the base. Multiple push rods are spaced circumferentially around the outside of the fixed base, and vertical grooves corresponding to the push rods are spaced circumferentially around the inner seat. The push rods pass through the vertical grooves from top to bottom. This invention, by setting a fixed base on the drill bit and designing push rods, a top head, a linkage mechanism, and a long rod, allows the long rod to be positioned within the gaps between the breaking teeth, thereby pushing away stuck rock fragments, preventing the gradual accumulation of rock fragments, ensuring that the drilling efficiency of the drill bit does not decrease, and ensuring normal drilling progress.

A method includes taking at least one image of a plurality of returned rock fragments from a wellbore using a camera, analyzing the at least one image with an image analysis program to detect a caving in the plurality of returned rock fragments, constructing a model of the caving, and incorporating the model of the caving into a finite element geomechanics model of the wellbore using a meshing program to create an adjusted model of the wellbore.

The utility model provides a broken rock formation easy to return type reamer, which comprises a guide head, a drill bit body and a connecting cylinder, which are coaxially arranged. The guide head and the drill bit body are provided with multi-stage cutting tooth devices, wherein the guide cutting teeth at the front end of the guide head can be accurately positioned and preliminarily break rocks, the front cutting teeth at the upper end of the drill bit body are densely distributed to efficiently break rock layers, the rear cutting teeth at the lower end cut the rock fragments in the hole and the deformed hole wall during back drilling to break the jam. The drill bit body and the guide head are provided with annular slag discharge grooves on the outer sides, which form a spiral slag discharge channel in cooperation with the flushing holes on the body to improve the slag discharge efficiency. The cutting teeth are detachably connected with the tooth holes through threads, which facilitates replacement and maintenance. The coaxial integrated structure and the high-strength material design reduce the eccentric wear and prolong the service life. The utility model realizes efficient drilling and smooth back drilling in the broken rock formation, significantly improves the operation efficiency, reduces the equipment loss and has good engineering application value.

Techniques for determining a rock fragment size and size distribution include determining rock fragment parameters associated with a well systems. The techniques further include determining a fractal dimension based, at least in part, on the rock fragment parameters. The techniques further include determining a rock fragment size distribution based, at least in part, on the fractal dimension.

The invention provides an apparatus for preventing surrounding loose rock fragments from falling or collapsing into a bore hole during drilling and immediately after removal of a drill string from the bore hole. The apparatus includes bore hole sleeve for a bore hole drill, the sleeve including a tube member adapted to be coupled to a mast of a mobile bore hole drill and to be positioned within the collar region of a bore hole, the tube member including a longitudinal internal passage for receiving a drill string therethrough and an external surface for facing outwardly against a wall of the bore hole.

This utility model discloses an excavator and its dual-bucket cylinder protection device. The dual-bucket cylinder protection device includes a protective cover connected to the bucket head via a first fixing component and a track connected to the cylinder via a second fixing component. The protective cover is positioned above the piston rod. Slide grooves are provided on both sides of the track. Sliding blocks matching the slide grooves are provided on the inner walls of both sides of the protective cover. The sliding blocks are slidably connected to the slide grooves. The first fixing component includes a first support frame fixed to both sides of the protective cover via a first fastener. A first fixing frame is fixedly connected below the first support frame via a third fastener. The second fixing component includes a second support frame fixed to the track via a second fastener. A second fixing frame is fixedly connected below the second support frame via a fourth fastener. This device effectively blocks mineral and rock fragments splashed in the mining environment, preventing the piston rod from being hit or scratched, achieving dynamic protection of the piston rod throughout its stroke, and significantly reducing the risk of surface damage.

A method for depth determination of drilled cuttings is disclosed. Tracers are injected and transported downhole along the mud flow (204, 205) and adhere to cuttings. Cuttings impregnated with tracers are detected at the surface (108) based on molecular weight, emission wavelength or radio frequency features used to encode the tracers. When a specific batch of tracers is released into the mud, the identification code identifies the depth of the drill bit. In addition to mud properties, flow rate, drilled volume and rate of penetration, formation characteristics and well specifications, detection data is transmitted to and analyzed by a tracer analysis and control engine (202). The tracer analysis and control engine (202) controls an internet of things controller (203) that adjusts parameters of a tracer injection pump (206) to enable intelligent controlled release, thereby optimizing the depth characterization process.

This invention belongs to the field of coal mine goaf filling methods, specifically relating to a dip-strip filling method for goaf in ultra-long working faces. The invention proposes grouping multiple working faces together and setting up fracturing roadways outside all working faces. Through these fracturing roadways, fracturing and cutting zones are constructed along the dip in the basic roof, forming fracturing rock fragments on both sides of the strike, a cutting block in the middle, and collapsed rock masses adjacent to intact rock strata on both sides of the dip. Then, the cutting block is used as a diffusion surface for grouting, grouting the surrounding fracturing rock fragments to form several dip-stripped, highly supportive strips composed of rock fragments, cutting blocks, and grout; controlling the subsidence of the overlying sandstone group and preventing rockbursts. Subsequently, the remaining fracturing boreholes, cutting boreholes, and grouting boreholes are used to fill the goaf in subsequent working faces, thus solving the problem of large-scale long-bore drilling in ultra-long working faces.

This invention provides a protective cover for a borehole imaging camera lens. The protective cover includes an end cap, a cylindrical body, and legs. The cylindrical body has a first through-hole and a second through-hole disposed opposite to each other. The end cap covers the first through-hole, and the second through-hole forms a port for inserting the borehole imaging camera lens. Multiple legs are arranged circumferentially on the side wall of the cylindrical body, with the legs open near the second through-hole. This invention effectively blocks and pushes away mud, dust, sand, debris, rock fragments, and other debris. During use, it protects the borehole imaging camera lens from collisions and scratches, ensuring clear and reliable observation results and extending the lens's lifespan.

This invention discloses a method and system for analyzing blasting charges based on knowledge graphs, belonging to the field of knowledge graph technology. The method includes: discretizing the rock mass to be blasted into graph nodes; mapping the spatial distribution characteristics of the rock mass's original microfractures to initial implicit tearing degrees on entity relationship edges to construct an initial geological knowledge graph; mapping the initiation energy to the initial information entropy impulse injected into the nodes; using a Markov entropy flow graph operator to drive the initial information entropy impulse along entity relationship edges for network propagation, and dynamically updating the current implicit tearing degree of the edges based on entropy flow loss to adjust subsequent entropy flow transfer; triggering an explicit topological tearing mechanism when the cumulative damage corresponding to any entity relationship edge exceeds the critical fracture tolerance; after the information entropy dissipation terminates, extracting the residual graph topology and decoding independent rock fragments based on connected components to output the blasting block size analysis results. This method can uniformly characterize fracture structure, blasting propagation, damage evolution, and block size formation process.

This invention relates to the field of solid waste resource utilization technology, and particularly to a multi-element solid waste synergistic road base material containing oil-based rock fragments and its preparation method. The primary objective of this invention is to provide a multi-element solid waste synergistic road base material containing oil-based rock fragments, comprising the following raw materials in parts by weight: 20-30 parts desulfurized gypsum, 55-65 parts fly ash, 3-9 parts oil-based rock fragments, 6-12 parts cement, 1-3 parts curing agent, and 15-17 parts water; the curing agent is a mixture of powdered anhydrous sodium silicate and anhydrous sodium sulfate. Under conditions of high solid waste content (≥85%), a base material system based on desulfurized gypsum-fly ash-activated oil-based rock fragments is constructed. Through the composite curing agent, rapid early strength establishment and continuous densification are achieved, significantly reducing clinker usage and unit carbon emissions, while also considering wet-mixing stability, volume stability, and durability, thus meeting the requirements for highway base and subbase engineering applications.

The present application relates to the field of geological drilling technology, and discloses a kind of based on intelligent perception and the prevention of sticking pipe system and control method of the coordination of fragment capture-transportation-rolling, realize the efficient safe removal of annular bulk fragment and the independent prevention and control of sticking risk.The present application acquires multi-source signal by multi-source fusion perception short section in real time, and the downhole intelligent control unit autonomously distinguishes hole wall instability and bulk rock fragment sticking risk;When sticking hazard occurs, carry out drilling fluid circulation preliminary chip removal first, and if the risk is not removed, drive annular fragment screen capture assembly to expand, and intercept oversized rock fragments exceeding screen aperture.Subsequently, the drill pipe is lifted and the hard rock section with complete well wall is identified, and the crushing roller is pressed against the rock in the hard rock section to achieve rolling and crushing relying on the rotating power of the drilling machine.

This invention discloses a drilling device and method for geotechnical engineering exploration. The drilling device includes a drilling assembly, a transmission assembly, and a scraping assembly. By moving the device to a suitable position, a drive motor drives a threaded rod to rotate. With the help of a threaded cylinder, a support rod, and a guide, the lifting plate can descend at a uniform speed. Under the drive of the drive motor, the drilling rod can rotate, and with the help of the drill bit, drilling operations can be performed on the rock and soil surface. During the descent of the lifting plate, the fixed rack and pinion drive gear set structure can operate, and the movable plate in the scraping assembly can be driven to move inside the mounting frame through the connecting piece. Thus, the soil and rock fragments generated during drilling can be transferred from the edge of the hole to the outside through the scraper. This reciprocating motion can quickly process the accumulated soil and rock fragments during the drilling process.