30results about How to "Not easy to collapse holes" patented technology

A construction method for accurately penetrating drainage holes in underground tunnels of coal mines, comprising a combination of directional drilling tools for accurate piercing, a back-pulling reaming bit, a wall-protecting steel casing, and the like. The hole trajectory control technology is used to construct accurate piercing holes to connect the outlet roadway and the drainage roadway. After the drilling is pierced, the back-towing reaming bit is replaced without lifting the drill to reversely expand, repeat the multi-stage reaming, and replace it in the opposite roadway. Change the diameter, connect the large-aperture protective casing, use the back-towing type to run the protective casing in the whole process, grouting and solidify, and install the drainage flower pipe for filtering the sundries in the water outlet roadway. Precise piercing and large-diameter casing run in the whole process, so as to effectively replace the excavation construction of special drainage roadway, and greatly reduce the cost of coal mine water hazard control.

The invention relates to a large diameter bedding drill hole drainage goaf along a roof and upper corner gas technology. The large diameter bedding drill hole drainage goaf along the roof and upper corner gas technology is characterized by comprising that steps that a high level coal seam drilling field is constructed in a return airway; (1), a crawler-type electric drilling machine is used for constructing a long-distance large-diameter drill hole in a drilling field in the mining direction separately forwards and backwards, after a drill tool is exited, a processed borehole protection sleevewith sieve holes of a certain length is pushed into the large-diameter drill hole to seal the large-diameter drill hole; (2), in the main roadway or up a hill, the borehole protection sleeve with thesieve holes and the corresponding extraction pipeline are connected to extract gas in a goaf and upper corner. The amount of drilling construction is nearly 50% less than that of fan-shaped arrangement in a high level drilling field, the cost is low, the large-diameter drill hole is constructed in a coal seam, the construction speed is faster than rock stratum holes, part of the coal is extractedduring the construction to save the cost of coal mining, gas extraction flow rate is large, the borehole protection sleeve is arranged in the large-diameter drill hole, holes are not prone to collapsing, the gas extraction effect is better, and the overlimit function of gas in roadways is effectively eliminated.

The invention discloses a grout runout treatment method for planting of a precast pile in a rubble layer. Through the grout runout treatment method, the grout runout problem occurring to the precast pile in the rubble layer is solved. A protective barrel is used during hole forming, thus stratum stability during hole forming is ensured, hole collapse is not liable to occur, after poured grout is poured in, conditions can be provided for initial setting time of the grout, and the effect that before initial setting of the grout, the rubble layer containing water does not collapse towards the inside of the hole is ensured. According to the technical scheme of the grout runout treatment method, the grout runout treatment method comprises the following steps that the precast pile is made and is transported to a pile planting site; the hole position of the precast pile is determined, the precast pile is put into the pile hole after drilling, and the protective barrel is put in the pile hole; the poured grout is made with a set ratio, and the grout is poured into the pile hole from bottom to top; the protective barrel is clamped by a vibration hammer to be matched with a crawler crane and is taken out, and grouting is completed; after grout is solidified for the set time, coring observation is conducted on the grout, and whether the grout runs off is judged; and if yes, holes are formed in the two sides of the pile hole, grout is sprayed, and the grout is reinforced.

The invention discloses a self-expanding device for expanding the bottom, which comprises an outer wall of a self-expanding box and an I-shaped structure; The upward and downward expansion force of the expansion material is suppressed, so that it can only expand horizontally. The invention can pour expansion material into the device, utilize the expansion performance of the expansion material to form an expansion head, the formation of the expansion head has no pollution such as noise and dust, is economical, easy to operate, has a wide application range, and can well meet the requirements for bearing capacity and pullout resistance. Design requirements for pile foundations with higher force requirements.

A method for constructing a high-strength chamber at the bottom of a vertical well, which is used for exploiting natural gas hydrates in sea areas, comprising the following construction steps: drilling into the stratum overlying the hydrate; drilling into the stratum below the hydrate floor; expanding the cavity in the stratum below the hydrate floor High-strength cement primary piles are formed by pouring high-pressure cement slurry without drilling; drilling of high-strength cement primary piles; secondary cavity expansion; chamber slag cleaning; cavity expansion inspection; The invention adopts the technology of reaming cast-in-place piles, through two times of cavity expansion and two times of pouring into piles, the diameter of the initial pile is relatively large, and the final pile is filled with cavity expansion on the basis of the initial pile, and the final pile has high strength and regular shape. The bottom hole chamber of the vertical well is built on the terminal pile, and the formation strength around the chamber is high, which can meet the requirements of gathering gas from horizontal wells to vertical wells in multiple well groups.

The invention relates to a soft soil layer foundation pit side slope anchor rod drilling device, which comprises a mounting bracket arranged on the breaking hammer head of a hydraulic breaker, a first mounting plate arranged at the bottom of the mounting bracket, and a The steel pipe used for drilling on the board; the present invention forms a drill rod by installing a steel pipe on the breaking hammer head of a hydraulic breaker, and uses the hydraulic function of the breaking hammer to push the steel pipe into the soil layer and form a hole after reaching the designed depth. Suitable for soft soil slopes.

The invention discloses a vibration and extrusion type drilling machine, comprising a chassis mechanism and a drilling mechanism, wherein the chassis mechanism is composed of a machine body, a traveling mechanism, a cab, an engine, a large arm and a small arm. The structure of the drilling mechanism is as follows: one side of a propelling beam is in slip fit connection with a carriage beam, a compensation cylinder hinged with the propelling beam is installed on the carriage beam, the carriage beam is hinged with a connecting seat and an angle adjusting cylinder, and the other end of the angle adjusting cylinder is hinged with the connecting seat; the other side of the propelling beam is in slip fit connection with a machine head seat provided with a vibrating mechanism and a rotating mechanism, a propelling cylinder on the propelling beam is in connection with the machine head seat through a propelling mechanism, a drill rod sleeve is installed under the vibrating mechanism, the drill rod sleeve is in connection with the rotating mechanism, and the lower part of the drill rod is connected with an extrusion head after passing through a rod clamping device; and the small arm of the chassis mechanism is fixedly connected with the connecting seat of the drilling mechanism. Compared with the prior drilling art, the vibration and extrusion type drilling machine has the obvious advantages of high efficiency, low energy consumption, no pollution to environment and firmness in drilled holes.