84results about How to "Achieve mining" patented technology

The invention discloses an extraction device for undersea gas hydrate and an extraction method thereof, which is characterized in that the device is directly communicated with undersea (10) gas hydrate layer (9) through a hollow rigid body (2); or the hollow rigid body is communicated with undersea (10) gas hydrate layer (9) through layers of sand and clay (8) or impermeable bed (11); a water pump (4) and a test and supervisory equipment (5) are provided on one side of the hollow rigid body, the water pump is connected with a drain pipe (3) which is above the sea level (7) through a pipe, the test and supervisory system is connected with an image pickup system and a pressure testing system, and a gas collecting pipe (1) is arranged on the top of the inside of the hollow rigid body. The extraction method comprises the following steps: 1) a hollow rigid body is built on the sea separated with water, and the hollow rigid body is communicated with undersea gas hydrate layer; 2) water in the hollow rigid body is drained out via a water pump to lower the water height in the hollow rigid body and reduce the pressure acting on the gas hydrate layer and the gas hydrate is decomposed into gas and water when the pressure acting on the gas hydrate layer is less than the balance pressure; 3) the decomposed gas escapes upward, is discharged through the gas collecting pipe and is collected.

The invention discloses a loop heat pipe type terrestrial heat exploitation system with adjustable and controllable working medium circular flow. The loop heat pipe type terrestrial heat exploitation system comprises a casing pipe type loop heat pipe, an earth surface heat exchanger and a liquid storage box. The earth surface heat exchanger and the liquid storage box are both located on the ground. The casing pipe type loop heat pipe comprises an evaporation section, a heat insulation section and a backflow section. The evaporation section is located in a high temperature heat reservoir. The earth surface heat exchanger is provided with a condensation section, and the condensation section and the outside carry out heat exchange. A one-way valve or a steam pump is arranged between the heat insulation section and the condensation section. A one-way throttle valve is arranged between the liquid storage box and the backflow section. The evaporation section, the heat insulation section, the condensation section, the liquid storage box and the backflow section are communicated in sequence end to end. Working medium fluid of the liquid storage box enters the evaporation section through the backflow section, and the liquid working medium fluid entering the evaporation section generates film boiling after absorbing heat. According to the loop heat pipe type terrestrial heat exploitation system, the working medium fluid of the liquid storage box passes through the backflow section, the liquid phase backflow mode and the boiling mode of the evaporation section are controlled, the effective filling factor of the terrestrial heat pipe can be adjusted in real time, and therefore terrestrial heat energy is stably and efficiently extracted.

The invention relates to a gob-side road retaining supporting method of mining roadways of coal mines, comprising the following steps of: feeding a concrete to a filling mould by using a pump to pour along the lapse of a working surface on a gob side of the gob-side road retaining, and constructing a roadside backfilling wall 8; supporting top plates arranged above the backfilling wall 8 and outside the backfilling wall 8 by using an anchor cable and constructing in the front side of a leading support 1; adopting a height-adjustable integral pull-shift type road-injecting slip mould 6 by the backfilling mould; using blindage supports 3 and 5 on one side of the gob of the road-injecting slip mould to temporarily support; connecting the road-injecting slip mould and the blindage supports with the leading support 1 through a pull-shift jack to shift; and enabling the blindage supports, the roadside backfilling wall and the top surfaces of each leading support supported by the external anchor cable to be provided with grooves for protecting anchor cables of anchor rods. Besides the advantages of digging less roads, realizing pillarless exploration, releasing the tension of mining drifting and the like, the invention also has the advantages that the height of the road-injecting slip mould is integrally regulated by means of integral pull-shift hydraulic, the road-injecting slip mould is convenient to use and the work efficiency is improved; the supporting of the anchor cable is matched with the supporting of the backfilling wall to effectively control a separation layer of an immediate roof, and the blindage supports and the leading support can protect the anchor cables and the anchor rods from being jacked broken so as to lose efficacy.

The invention relates to a mine recyclable steel cylinder packing pier column and a construction method thereof and a method for gob-side entry retaining, which belong to the field of mine laneway support. The steel cylinder packing pier column is a steel cylinder sand and stone packing pier column and consists of a height-adjustable steel cylinder mould and sand and stone packing which is filled in the steel cylinder mould, wherein the sand and stone packing is bulk sand or/and stones which are filled compactly, and also can contain other particulate matters; a filling opening is formed on the top of the steel cylinder mould; a discharging outlet is formed and an openable end cover of the discharging outlet is arranged on the lower part of the steel cylinder mould; two sides of the upper part of the steel cylinder mould are provided with support bases; the pier column is added with water and filled and constructed by a concrete injector; and the steel cylinder mould is taken as an outer wall of the pier column after being filled. The invention also provides a method for recycling the steel cylinder mould of the pier column and a self-advancing pneumatic vibration device. The pier column has a novel and practical structure, is readily available in materials, high in construction efficiency and low in support cost, and is easy to construct; the steel cylinder mould can be recycled for saving steel; and the yielding property of the support of the pier column is greatly improved to ensure that the pier column can meet the requirement that the influence of two-time mining is tolerated by the gob-side entry retaining well and is particularly suitable for the gob-side entry retaining.

The invention relates to a method for mining thin inter bed oil shale. The method comprises the steps that first, a first well completion shaft and a second well completion shaft are arranged downwards from the ground surface of the distribution area of the oil shale, and the first well completion shaft and the second well completion shaft both penetrate through a same oil shale layer; second, an artificial fracturing method is adopted, a crack communicating the first well completion shaft and the second well completion shaft is formed in the oil shale layer; and third, water vapor is injected into the first well completion shaft, and oil gas is collected from the second well completion shaft. The water vapor is injected into the first well completion shaft, and enters the crack. The water vapor brings heat into the oil shale layer. When the oil shale layer is heated, and the temperature of the oil shale layer reaches the pyrolysis temperature of kerogen, the kerogen in the oil shale layer is pyrolyzed. The oil gas enters the second well completion shaft and is mined from the second well completion shaft. The heat content of the water vapor is large, stratums are quickly heated when being heated by the water vapor, and the method is environmentally friendlier.

The invention discloses a non-chain-pillar exploitation method. The method comprises the following steps: tunneling a lower zone track lane along a reserved narrow chain pillar in a goaf after recovery of an upper zone working surface is ended; replacing the reserved narrow chain pillar with a filling body constructed along the edge of the goaf ahead a lower zone working surface after tunneling of a lower zone mining roadway is ended; gradually constructing the filling body in sections along with extending of the working surface until recovery of the lower zone working surface is finished; and sequentially circulating until coal mining of an overall area is finished. The support difficulty of gob-side entry driving is lowered, deformation of gob-side entry driving is effectively controlled, the goaf is isolated, and the recovery rate of coal resources is improved. The method is simple, safe, reliable and environmentally friendly, and has a useful effect.

The invention discloses a toothed chain stone cutting machine, which consists of a drill, a toothed chain saw and an in-depth saw. The drill is a machine for vertically feeding into rocks through rotation; the toothed chain saw is a machine for expanding based on holes made by the drill; the in-depth saw is a machine for expanding and cutting five rock edges of upper, down, left, right and inside according to the cruciform slot made by the toothed chain saw, which is applicable to both the excavation of mining marble, granite and other stones and the cutting and excavation of road, railway and rock tunnels under river and sea without damaging the working surface and producing any vibration to the mountain or tunnel of the working surface, thus ensuring the construction safety.

The invention relates to a fluidized mining method of combustible ice through rotary jet grouting and pressure relieving. The situations of pressure change and the like in a reservoir stratum can be grasped timely while pressure-relief mining is conducted on combustible ice resources, corresponding improving treatment is provided, and relative information of the reservoir stratum can be timely collected, fed back and processed while the mining speed and the like can be effectively controlled; and meanwhile the fluidized mining method of the combustible ice through rotary jet grouting and pressure relieving is low in mining cost, easy to achieve, high in economical efficiency, simple in mining technology and mature in related application equipment technology, and can rapidly achieve industrial mining application.

The invention provides a full negative pressure short wall filling coal mining method. The full negative pressure short wall filling coal mining method comprises the following steps that 10, positionsof a centralized return air lane and a centralized transportation lane are determined, and a transportation roadway, a first return air roadway and a second return air roadway are arranged; 20, tunneling is carried out on a branch lane in a first mining area, and after the branch lane is penetrated, tunneling is carried out on a branch lane in a second mining area, at the same time, supporting iscarried out on a penetrated branch lane, and a communication port between the penetrated branch lane and the transportation roadway is blocked; 30, the penetrated branch lane is filled after pluggingis finished; 40, tunneling is carried out on another branch lane in the first mining area, at the same time, supporting is carried out on a penetrated branch lane in the second mining area and a communication port between the penetrated branch lane and the transportation roadway is blocked; 50, the penetrated branch lane in the second mining area is filled after plugging is finished; 60, steps 10to 50 are cycled until the branch lane is completely filled; and 70, after filling is completed, reserved coal pillar lanes are successively mined according to the direction from the far end to the near end.

The invention discloses a coiled tubing hanger comprising a core shaft, an upper connector, a piston, a rubber cylinder assembly, a locking assembly, a tubing clamping assembly and a slip expansion guiding assembly. A pressure conveying hole is formed in the core shaft; the outer wall of the core shaft is sleeved with the upper connector connected with the core shaft; the core shaft is sleeved with the piston, and the piston is connected with the upper connector through first shearing nails; the outer wall of the core shaft is sleeved with the rubber cylinder assembly; the core shaft is sleeved with the locking assembly, and the locking assembly is connected with the core shaft in a matched mode; the tubing clamping assembly comprises slips which can be extruded to clamp a tubing and a slip seat for fixing the slips; and the slip expansion guiding assembly comprises an upper cone body and a lower cone body, and the outer wall of the core shaft is sleeved with the upper cone body and the lower cone body. According to the coiled tubing hanger provided by the invention, influence of an inlet gas extraction device on a downhole safety valve can be effectively avoided, the purpose of safe control is realized, oil gas extraction can be realized, and safety of extraction is guaranteed.

The invention provides a superhigh-water material filled working face gangue pumping gob-side entry non-pillar mining method. The method specifically comprises the steps of establishing a superhigh-water material filling system and a mine gangue pumping and filling system respectively; excavating a haulage roadway and a track roadway and forming a cutting hole in a mining area to form a complete first mining working face; conducting mining on the mining working face according to the normal working procedures; conducting backfilling on a mined goaf through a superhigh-water material; conductingfilling on the portion, where the roadway needs to be reserved close to the working face, of the goaf by pumping gangue filling bodies; after completion of filling, reserving the track roadway as thetrack roadway of a next working face, and excavating a new haulage roadway and forming a cutting hole to form a second mining working face; after completion of filling, reserving the haulage roadwayas the haulage roadway of the next working face, and excavating a new track roadway and forming a cutting hole to form a third mining working face, and repeating the steps. Through the superhigh-watermaterial filled working face gangue pumping gob-side entry non-pillar mining method, the strata pressure intensity of the working face is weakened, non-pillar mining is realized, and the mining rateof the mining area is remarkably increased.

The invention relates to a hydraulic starting and closing device for layered oil production of a sidetracked well. According to the technical scheme, a liquid inlet ring is connected to the upper sideof a lower connector, a one-way valve is arranged in a containing cavity of the lower side of the liquid inlet ring, and the liquid inlet ring is connected with a reversing track; a starting and closing execution valve bush is connected to the outer wall of the liquid inlet ring, a rotation ring sleeves the outer side of the reversing track, and a track pin is placed in a track groove of the reversing track through a track nail hole of the rotation ring; a sealing reversing sleeve is connected to the upper end of the starting and closing execution valve bush, an upper connector is connected to a pressure adjustment check ring, then a return spring sleeves a sealing short segment, one end of the return spring is in contact with a pressure check ring, the other end of the return ring is incontact with the pressure adjustment check ring, and the pressure adjustment check ring drives the sealing reversing sleeve to conduct sliding cooperation along the outer wall of the sealing short segment; a liquid outlet is formed in the lower end of the sealing short segment. The hydraulic starting and closing device has the advantages that an original three-layer structure is converted into a two-layer structure through a structural conversion part, the inner diameter of a layered oil production tool is further increased, layered oil production on multiple oil layers is achieved, and the applicative range is wider.

The invention discloses a support method for U-type ventilation primary tunneling setting-up double roadways. The method includes the steps of tunneling a tunnel face; moving an n-shaped filling and pouring movable formwork (21) forward; installing a sliding device for resisting wall displacement and transformation and a pre-tensioning method prestress anchoring device in the horizontal direction; pouring concrete to form artificial coal pillars; carrying out stepping movement; moving a support; propelling a tunneling machine (33) by following the tunneling tunnel face. The support method for the U-type ventilation primary tunneling setting-up double roadways is easy to implement, safe and reliable and saves cost, after one roadway is excavated, the one-to-two roadway setting-up mode is adopted, which is beneficial for improving ventilation during tunneling, the work of excavating one mining roadway is omitted, a great number of manpower resources are saved, the setup time of the coal face is reduced, continuing tension of excavating work is relieved, section coal pillars are omitted, an artificial built concrete wall structure is adopted to achieve coal-pillar-free mining, the recovery ratio is increased, coal resources are fully explored, and requirements of multiple mining movement influence for fore supporting pressure and post-mining peak pressure are met.

The invention discloses a one-time tunneling two-roadway-retained excavating operation production line. A single roadway is divided into two roadways including a gate roadway on one side and a remained gob-side roadway on the other side along a mid-partition wall located behind an excavating face and timbered by concrete grouting workers after single roadway tunneling during stope face roadway tunneling, and heading machines and adhesive-tape rock discharging conveyers are arranged in the two roadways. A communicating roadway communicated with the gate roadway and the remained gob-side roadway is arranged behind the excavating face, the gate roadway, the remained gob-side roadway and the communicating roadway jointly form a U-shaped ventilation structure, an advanced-timbering self-moving formwork hydraulic pull frame timbering device is arranged in the communicating roadway, and the rear end of the advanced-timbering self-moving formwork hydraulic pull frame timbering device is in abut joint with the mid-partition wall. The one-time tunneling two-roadway-retained excavating operation production line is easy to construct, safe and reliable, the costs are saved, one-time excavating and timbering construction along the remained gob-side roadway and the stoping gate roadway is not only completed, roadway ventilation can be also achieved, and the requirement for multiple influences induced by mining about advanced bearing pressure and peak pressure after excavation can be met.

The invention relates to the technical field of mining and discloses a sieve tube process brine extraction device which comprises an inclined shaft (1), an inclined shaft casing pipe (2) and a centralpipe (3), wherein the tail end of the central pipe (3) is sealed; the inclined shaft casing pipe (2) is positioned in the vertical section of the inclined shaft (1); the central pipe (3) is positioned in the inclined shaft casing pipe (2); a preset distance H1 is formed between the inner wall of the inclined shaft casing pipe (2) and the outer wall of the central pipe (3); the lower part of the central pipe (3) extends to be overlapped with the horizontal section of the inclined shaft (1); and a plurality of water orifices (4) are formed in the side wall of the section, overlapped with the horizontal section of the inclined shaft (1), of the central pipe (3) in the length direction of the central pipe (3). Compared with the prior art, through adding the simple central pipe, the sieve tubeprocess brine extraction device can greatly increase the mining coefficient, is simple in structure, convenient to implement and saves energy and reduces emission.