34results about How to "Save excavation costs" patented technology

The invention relates to a method of solid filling coal mining and building gangue walls along the goaf, which is to build a gangue wall on the side of the filling body in the goaf of the coal mining face, and pack the coal mine gangue into the gangue wall with woven bags or snakeskin bags. If it is full and built into a wall, the coal mine gangue can be directly filled with the gangue filling the coal mining face. Then, the gangue wall needs to be pre-prepared with single-layer metal mesh, "W"-shaped steel belt, ladder beam and double-ended threaded anchor rod. Tight support. As the working face continues to advance, this method can leave a complete gangue wall for the mining of the next working face. The roadway retaining method is simple and practical, has high support strength and low cost.

The invention discloses a subdepot pier-type foundation pit support structure and a construction method; the structure comprises soil-retaining and water-stopping row piles, piers and waist beams; at least two piers are arranged; the piers and the soil-retaining and water-stopping row piles are connected through the waist beams; the soil-retaining and water-stopping row piles comprise soil-retaining piles and water-stopping piles which are lined vertically and ring beams which are arranged on the tops of the soil-retaining piles and the water-stopping piles; each pier comprises a pier pile, a pier cover beam and an inclined support; the piers are lined vertically; the pier cover beams are arranged on the tops of the pier piles to connect all the pier piles; one ends of the pier cover beams are connected with the waist beams; each pier pile comprises an upper pier pile which is arranged at the upper part and a lower pier pile which is arranged at the lower part; and one ends of the inclined supports are connected with the waist beams, and the other ends of the inclined supports are connected with the upper pier piles. According to the subdepot pier-type foundation pit support structure and the construction method, the support in a foundation pit is eliminated, the excavation is convenient and the construction speed is high.

The invention discloses a sublevel caving method for exploiting a soft and broken ore body without a sill pillar. By using the method, the problem that developing roadways are destroyed by ground pressure is effectively solved, the stability of the roadway engineering and the utilization rate of the developing roadways are improved, the support cost is lowered, the operational safe condition is improved, the mining cost is lowered, and the ore recovery is raised. The technical proposal comprises the following key points: depressurizing by the sublevel caving method without a sill pillar, firstly tunneling and backstoping a first-section ore body, transferring the pressure above an area to be backstoped of next section to the rock mass around the ore body to ensure no over high stress concentration in the backstoping area so as to form a stress decrease area, and excavating in the stress decrease area, wherein the first section uses a large backstoping roadway distance to ensure the stability of the backstoping roadway. The invention is suitable for exploiting a soft and broken ore body in the high-stress area by the sublevel caving method without a sill pillar.

The invention relates to the pipeline construction method field of a metallurgy system, in particular to a pull pipe mounting method of a passing pipeline, which comprises the following steps of: unreeling a pipeline; digging pilot trenches; making the pipeline; popping conducts; connecting steel wires; pulling the conducts and the steel wires; pulling sleeves; and penetrating and mounting a construction pipe. The pull pipe mounting method of a passing pipeline is characterized in that when the conducts are popped, the front conduct is popped in by top pressing equipment (4); and then, the rear conduct (12) is popped in; and when the sleeves are pulled, the conducts and the sleeves are connected, the front conduct (11) is pulled, and the rear sleeve (22) is popped in until the front sleeve (21)passes out of a pilot trench (2) at the other side. The invention has low construction cost, short construction period, high mounting quality and high production efficiency.

The invention discloses a Drilling, joint-cutting and fracturing integrated device for hard rock. The device comprises an oil cylinder supporting base, a pushing oil cylinder, a guide rail, a swing driving device, a rubber ring, a reverse extruding ring, a drill rod, a drill head, a flowing passage shaft, a rotary sealing shaft and a rotary sealing sleeve; the oil cylinder supporting base is fixedto the back end of the guide rail, the swing driving device is slidably connected with the guide rail, and the pushing oil cylinder is fixed to the oil cylinder supporting base; a piston rod of the pushing oil cylinder is connected with the swing driving device, the front end of an output shaft is separately connected with the back end of the drill rod, the front end of the drill rod and the backend of the drill head, and the flowing passage shaft installed on the output shaft and in the drill rod is connected with the back end of the drill head; the rotary sealing sleeve is fixed to the back end of the swing driving device, the rotary sealing shaft penetrating through the rotary sealing sleeve is connected with the flowing passage shaft, and the rubber ring is fixed to the front end ofthe swing driving device and connected with the reverse extruding ring. The device can achieve drilling, joint cutting and fracturing integration operation on hard rock, and has the advantages that the capacity of crushing hard rock (f)10) is high, the efficiency is high, and the quantity of produced dust is low.

The invention provides lifting equipment, which has a self-locking function and low height. In particular, a compound band 2 forms the rising motion of a single liftable compound pipe through a combined motion of a compound mechanism 5 and forms the falling motion of the single liftable compound pipe through decomposed motion of the compound mechanism 5. The single liftable compound pipe can be kept at the stopped position for long time and has shallow foundation pit.

The invention discloses a tunneling method capable of weakening hard rock strength. According to the method, a tunneling machine, an integrated grinding jetting drilling machine with the tunneling machine as a carrier, and a high-pressure water pump are arranged on a tunneling working surface; the integrated grinding jetting drilling machine is adopted to form drilled holes in a rock body, and a series of conical crack clusters are formed through cracking cutting on the basis of hole drilling; a high-pressure hole sealing device is used for sealing the tunneling surface for a distance, the high-pressure hole sealing device is communicated with a high-pressure water pump through a water inlet pipe, the characteristic that the rock body is resistant to pressure but not resistant to drawing is utilized, the conical crack clusters in the rock body are expanded to form a dense conical crack net, and therefore the rock strength is weakened; a tunneling machine cutting head is adopted to cutthe rock which has an internal conical crack net, the tunneling efficiency is greatly improved, the service life of the tunneling machine can be prolonged, and the tunneling cost is reduced.

The invention discloses a horizontal transport haulageway for mid-deep and deep mining, which comprises a haulage level hanging wall haulageway, a footwall haulageway, and an annular haulageway formed by a haulage level transverse drift roadway. The horizontal transport haulageway for mid-deep and deep mining is characterized in that a pressure relief line is made from an angle part of an air return horizontal mining roadway lying side to the transportable horizontal surface; an 90-degree included angle is formed between the pressure relief line and the transportable horizontal surface; an upper side of the hanging wall haulageway is arranged from a boundary of a footwall of an ore body to the outside of the pressure relief line. Through the manner, a position of the horizontal transport haulageway is confirmed, the additional force action of a wedge-shaped pressure body is avoided, the haulageway digging cost is greatly saved, the service life of a main transport haulageway is prolonged, the working conditions of workers is improved, and the recovery rate of ores is improved.

The invention discloses a construction process of a sewage collection well. The sewage collection well comprises a well body, wherein a water storage cavity is formed in the well body, and the bottomsurface of the water storage cavity is provided with a inclined bottom. The construction process of the sewage collection well is convenient to construct, suitable for various terrains, shallow in excavation depth, and capable of reducing excavation cost and influence on the environment; due to the adoption of the inclined water inlet pipeline, the sewage can flow into the well body by gravity, the sediment is guided through the inclined bottom with three inclined surfaces, the bottom silt can be removed more conveniently, and the efficiency is higher; and the conical flow guide shell is adopted to guide the supernatant, meanwhile, the sedimentation of the filter substances of the secondary filter plate and the fine filter plate is improved, the convex port can effectively disturb the flow, the liquid flow is reduced, and the sewage is favorably collected.

The invention discloses a negative pressure sewage collecting process. The process comprises the following steps that S1, collecting wells are arranged, specifically, one collecting well is arranged in each rural household, and water inlet pipelines are arranged on the collecting wells correspondingly; S2, a negative pressure collecting tank is arranged, specifically, a collecting tank is arranged, a vacuum pump is arranged in the collecting tank, a plurality of negative pressure pipelines are arranged on the vacuum pump, negative pressure ports are formed in the collecting wells correspondingly, and each negative pressure pipeline extends into the negative pressure port of one corresponding collecting well; and S3, the negative pressure pipelines are paved, specifically, a zigzag laying mode is adopted on a gradient-free road surface, and a bag type vacuum pipeline paving mode is adopted on a continuous uphill road surface. The negative pressure sewage collecting process is good in practicability, the pipeline sealing performance is good, the sewage leakage and rainwater leakage phenomenon can be effectively avoided, the flow speed in the sewage pipelines is relatively large, sewage sedimentation and blocking phenomena can be reduced easily, and operation and management of a sewage collecting pipe network are facilitated.

The invention belongs to the technical field of underground mining for mines, in particular to a method for presetting roadways by section moulds. The method comprises the following steps: laying the placeholder section moulds in advance at the mined area bottom of a one-step stope, then filling the placeholder section moulds with non-cemented slurry, starting filling operation of the one-step stope after performing dewatering, after the filling of the one-step stope is completed, using the common digging mode to form ore drawing roadways of a two-step stope, and presetting the ore drawing roadways by the section moulds. The method for presetting the roadways by the section moulds avoids drilling, blasting and tunneling of the ore drawing roadways again in a filling body, so that the tunneling efficiency and operation safety of stope preparation roadways are greatly enhanced, and then the tunneling cost is lowered.

The invention relates to the field of pipeline construction methods in metallurgical systems, in particular to a pipe-jacking installation method of a bypass pipeline. The pipe-jacking installation method of the bypass pipeline comprises the following steps of: paying a pipeline off->excavating a guideway->producing a sleeve->jacking a front sleeve->connecting the sleeves->jacking a rear sleeve->passing through an engineering pipeline and installing. The method is characterized in that: in the process of jacking the front sleeve, the front sleeve (11) is jacked ahead by a jacking device (4), and the rear sleeve (12) is then jacked till the front sleeve (11) is penetrated from the interior of the guideway (2) at the other side. The invention has low construction cost, short construction period, high installation quality and high production efficiency.

The invention relates to a single-stud head hard alloy composite stud and a preparation method thereof. The single-stud head hard alloy composite stud is designed into a stud head and a stud body in the height direction. The preparation method comprises the following steps of step I, preparing the stud body raw materials and the stud head raw materials, wherein the stud head comprises 10-20wt% ofspherical casting tungsten carbide granules after carbonization, 1-7wt% of ceryl composite molding agents, and the balance stud body raw materials; step II, adding the stud head raw materials and thestud body raw materials to the molds through a joint injection molding method or a batch charging compression moulding forming method to obtain a stud soft blank having a composite structure; and stepIII, under inert gas atmosphere, performing high-temperature low-pressure sintering on the stud soft blank having the composite structure obtained in the step II, enabling a combination interface ofthe stud head and the stud body to generate a metallurgy reaction to form a transition layer, and integrally forming the stud head and the stud body to obtain the single-stud head hard alloy compositestud. Through the adoption of the single-stud head hard alloy composite stud disclosed by the invention, the technical problem that a conventional hard alloy stud cannot take account of wear resistance and tenacity synchronously is solved.

The invention relates to a tube-fin type hard rock tunneling machine, belongs to the field of engineering machinery, and is used for solving the problems that according to an existing tunneling technology, the hard rock cutting amount is large, the resources are wasted, the tunneling speed is slow, the tunneling cost is high, concrete pipe sheets are purchased, and the service life of a building is only 100 years. A tunneling technology of the tube-fin type hard rock tunneling machine provided by the invention comprises: a plurality of arc-shaped cutters at the front end of a cutter disc circumferentially cut hard rock in a tunneling space into rock barrels; rock cores are taken out through water milling drills and a splitter in the center of the cutter disk; the rock barrels are cut and sawn into pipe sheets along the longitudinal direction; the pipe sheets and rock bodies are horizontally separated through cut saws in front of the center of the cutter disc; and a feeding and discharging channel at the rear end of the cutter disk is used for feeding cooling cement pastes and discharging the pipe sheets and crushed rocks. Compared with the prior art, according to the tube-fin typehard rock tunneling machine provided by the invention, the tunneling space hard rocks are manufactured into reinforced composite pipe sheets for lining tunneling rock walls, remained pipe sheets are directly sold or increase export revenue to offset the investment, the hard rock cutting amount is small, the resource utilization rate is high, the tunneling speed is fast, the tunneling cost is low,the project investment is low, and the service life of the building can reach to 1000 years.

The invention discloses a sunken prefabricated inspection well and a underground construction method thereof. The sunken prefabricated inspection well comprises a top plate, a bottom plate and a valve well shaft, wherein the top plate and the bottom plate are fixedly arranged and plugged on the end faces of two axial openings of the valve well shaft, an annular blade foot is integrally manufactured at an opening in the bottom of the valve well shaft, a plurality of holes are formed in the lower portion of the valve well shaft in the radial direction, and a bracket extending in the radial direction is integrally manufactured on the inner wall of the valve well below the hole. The underground construction method for the prefabricated inspection well comprises the steps that firstly, a valve well shaft is prefabricated in a factory and vertically hoisted to a preset underground position; secondly, a base plate is laid at a top opening of the valve well shaft, and pressure equipment is erected at the axis position of the top face of the base plate; thirdly, the valve well shaft is pressed to the preset buried depth, and then muck in the valve well shaft is excavated; and fourthly, a concrete bottom plate is poured, and a concrete top plate is installed. The prefabricated inspection well is convenient to use, simple to construct and small in influence on traffic and daily life of nearby buildings and human beings.