Deep high-temperature mine roadway heating and cooling device and construction method

Abstract

The invention discloses a heating and cooling device for a deep high-temperature mine roadway. The heating and cooling device comprises a cooling supporting device, a heat utilization device and a connecting device. The cooling support device comprises a cement mortar layer and a coaxial anchor rod, and the cement mortar layer is arranged between the coaxial anchor rod and the surrounding rock; the coaxial anchor rod comprises a pipe body and a top end part, the pipe body comprises an inner pipe, an outer pipe and supports, the outer pipe is arranged on the outer side of the inner pipe in a sleeving mode, and the supports are arranged between the outer pipe and the inner pipe; protrusions are arranged on the outer wall of the outer pipe, and the outer wall of the inner pipe is coated with a heat preservation and insulation material. The connecting device comprises a circulating water pump, a water inlet pipe and a water outlet pipe. Meanwhile, the invention further discloses a construction method of the deep high-temperature mine roadway heating and cooling device. The roadway stability is guaranteed, meanwhile, the roadway temperature is reduced, and a comfortable environment is provided for safe mining; by means of the device, deep geothermal energy can be extracted, service is provided for life of the mine ground, and the energy-saving and environment-friendly effects are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mining, and in particular to a deep high-temperature mine tunnel heat extraction and cooling device and a construction method. Background Art

[0002] In deep mining, high ground temperature is regarded as heat hazard, and heat dissipation from surrounding rocks accounts for more than 40%-50% of the total heat dissipation of the mine, which is a key technical problem restricting safe deep mining.

[0003] At present, ventilation cooling, refrigeration cooling and other technologies are mainly used to reduce high geothermal heat. The above methods have the problems of high cooling cost and unsatisfactory effect. At the same time, the high-temperature heat energy contained in the surrounding rock of the tunnel is not effectively utilized, resulting in energy waste.

[0004] Secondly, the thermal insulation support device for mine tunnels in the prior art has the disadvantages of complex structure, complex construction method, high cost, and easy destruction of thermal insulation effect.

[0005] Therefore, it is necessary to develop a deep high-temperature mine tunnel device and construction method that can effectively reduce temperature and reduce costs. Summary of the invention

[0006] In view of the above problems, the present invention aims to provide a deep high-temperature mine tunnel heat extraction and cooling device and construction method, aiming to achieve the purpose of integrating tunnel support and cooling, and at the same time effectively utilize the high-temperature thermal energy in the tunnel surrounding rock to achieve the multiple purposes of tunnel support, cooling and heat recovery. The specific technical solution is as follows:

[0007] A heat extraction and cooling device for a deep high-temperature mine tunnel, comprising a cooling support device, a heat utilization device, and a connection device;

[0008] The heat utilization device comprises a heat pump unit and a heat source utilization terminal, and the heat pump unit is connected to the heat source utilization terminal;

[0009] The cooling support device comprises a cement mortar layer and a coaxial anchor rod, wherein the cement mortar layer is arranged between the coaxial anchor rod and the surrounding rock; the cement mortar layer plays a role in stabilizing the surrounding rock; the coaxial anchor rod comprises a tube body and a top portion, wherein the tube body and the top portion are fixedly connected, and the top portion is in a triangular pyramid shape, wherein the tube body comprises an inner tube, an outer tube, and a bracket, wherein the outer tube is sleeved on the outside of the inner tube, and a plurality of brackets are arranged between the outer tube and the inner tube, and a sealing port is arranged between the tail end of the inner tube and the tail end of the outer tube, and a water inlet is arranged at the sealing port, and a water outlet is arranged at the tail end of the inner tube; a protrusion is arranged on the outer wall of the outer tube, and a thermal insulation material is applied to the outer wall of the inner tube;

[0010] The connecting device includes a circulating water pump, a water inlet pipe, and a water outlet pipe. One end of the water inlet pipe is connected to the water inlet, and the other end of the water inlet pipe is connected to a water source. The water inlet is connected to one end of the water outlet pipe, which is fixedly connected to the water outlet, and the other end of the water outlet pipe is connected to the heat pump unit. Circulating water pumps are respectively arranged on the water inlet pipe and the water outlet pipe.

[0011] Preferably, the length of the coaxial anchor is 1200mm-10000mm, the diameter of the outer tube is 95mm-110mm, the diameter of the inner tube is in the range of 38mm-50mm, the number of the protrusions is several, the interval between every two protrusions is 100mm-300mm, and the height of the protrusion is 5mm.

[0012] Preferably, the material of the inner tube is one of PB, PERT, PPR and PE.

[0013] Preferably, the outer tube is made of a steel tube.

[0014] Another object of the present invention is to provide a construction method for the above-mentioned deep high-temperature mine tunnel heat extraction and cooling device, comprising the following steps:

[0015] ① Drill a hole at the junction of the tunnel and the surrounding rock, the diameter of the hole is 130mm-171mm, the depth of the hole is 1400mm-10200mm, and a coaxial anchor rod is placed in the hole;

[0016] ②Inject cement mortar between the surrounding rock and the outer wall of the coaxial anchor;

[0017] ③ Lay the water inlet pipe and the water outlet pipe, and install circulating water pumps on the water inlet pipe and the water outlet pipe respectively;

[0018] ④ Connect one end of the water inlet pipe to the water inlet, connect the other end of the water inlet pipe to the water source, fix one end of the water outlet pipe to the water outlet, and connect the other end of the water outlet pipe to the heat pump unit;

[0019] ⑤Connect the heat pump unit to the heat source utilization terminal.

[0020] When working, start the water source switch, and normal temperature water or cold water enters the space between the outer tube and the inner tube of the coaxial anchor from the water inlet pipe, and then flows out through the hollow part of the inner tube. The external water carries away the heat of the surrounding rock through heat exchange, reducing the temperature of the surrounding rock. The water after heat exchange is transported to the heat pump unit through the outlet pipe. The heat extracted by the heat pump unit is used for heat source utilization terminals, such as winter heating and summer bathing in mines.

[0021] Beneficial effects of the present invention:

[0022] 1. Integrated design: The present invention combines tunnel support with cooling to ensure tunnel stability while reducing tunnel temperature to provide a comfortable environment for safe mining; it realizes an integrated design of support and cooling, reduces costs and improves efficiency.

[0023] 2. Heat utilization: The device of the present invention extracts high-temperature heat energy from the tunnel surrounding rock and uses it for heating buildings in the mining area, bathing water for employees, etc., thus achieving effective utilization of heat, reducing energy consumption, and saving energy and protecting the environment.

[0024] 3. Simple construction: The present invention adopts a coaxial anchor rod structure, which is simple to construct and easy to maintain, reducing the construction difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a heat extraction and cooling device for deep high-temperature mine tunnels.

[0026] Figure 2 This is one of the structural schematic diagrams of the coaxial anchor.

[0027] Figure 3 This is the second structural schematic diagram of the coaxial anchor.

[0028] Figure 4 Schematic diagram of water flow in the coaxial anchor.

[0029] In the figure: 1 is a coaxial anchor rod; 2 is a water outlet pipe; 3 is a water inlet pipe; 4 is a heat pump unit; 5 is a circulating water pump; 6 is an inner pipe; 7 is surrounding rock; 8 is a tunnel; 9 is a protrusion; 10 is a bracket; 11 is a heat source utilization terminal; 12 is a cement mortar layer; 13 is a top part; 14 is a pipe body.

[0030] The direction of the arrow in the figure represents the direction of water flow. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] like Figures 1 to 4 As shown, a deep high-temperature mine tunnel heat extraction and cooling device includes a cooling support device, a heat utilization device, and a connecting device;

[0033] The heat utilization device includes a heat pump unit 4 and a heat source utilization terminal 11, and the heat pump unit 4 is connected to the heat source utilization terminal 11;

[0034] The cooling support device comprises a cement mortar layer 12 and a coaxial anchor rod 1, wherein the cement mortar layer 12 is arranged between the coaxial anchor rod 1 and the surrounding rock 7; Figure 1 It can be seen that multiple groups of cooling support devices are set at the connection between the tunnel 8 and the surrounding rock 7;

[0035] The cement mortar layer 12 plays a role in stabilizing the surrounding rock 7; the coaxial anchor 1 includes a tube body 14 and a top portion 13, the tube body 14 and the top portion 13 are fixedly connected, the top portion 13 is in a triangular pyramid shape, the tube body 14 includes an inner tube 6, an outer tube, and a bracket 10, the outer tube is sleeved outside the inner tube 6, a plurality of brackets 10 are arranged between the outer tube and the inner tube 6, and the outer tube and the inner tube 6 are coaxial; the plurality of brackets 10 are used to ensure that the gap between the outer tube and the inner tube 6 is uniform. The gap between the outer tube and the inner tube 6 serves as a water flow channel, and water flows through it to take away the heat of the surrounding rock 7.

[0036] A sealing port is arranged between the tail end of the inner tube 6 and the tail end of the outer tube, a water inlet is arranged at the sealing port, and a water outlet is arranged at the tail end of the inner tube 6; a protrusion 9 is arranged on the outer wall of the outer tube, and the outer wall of the inner tube 6 is coated with thermal insulation material; a protrusion 9 is arranged on the outer wall of the outer tube to increase the friction between the outer tube and the cement mortar, so as to achieve the purpose of stabilizing the coaxial anchor rod 1.

[0037] The connecting device includes a circulating water pump 5, a water inlet pipe 3, and a water outlet pipe 2. One end of the water inlet pipe 3 is connected to the water inlet, and the other end of the water inlet pipe 3 is connected to the water source. One end of the water outlet pipe 2 is fixedly connected to the water outlet, and the other end of the water outlet pipe 2 is connected to the heat pump unit 4. The circulating water pump 5 is respectively arranged on the water inlet pipe 3 and the water outlet pipe 2.

[0038] Preferably, the length of the coaxial anchor rod 1 is 1200mm-10000mm, the diameter of the outer tube is 95mm-110mm, the diameter of the inner tube 6 is in the range of 38mm-50mm, the number of protrusions 9 is several, the interval between each two protrusions 9 is 100mm-300mm, and the height of the protrusion 9 is 5mm.

[0039] Preferably, the material of the inner tube 6 is one of PB, PERT, PPR and PE.

[0040] Preferably, the outer tube is made of a steel tube.

[0041] like Figure 1 As shown in the figure, the cross section of the tunnel 8 in this case is a semicircular upper part and a rectangular lower part, and is supported by multiple groups of cooling support devices. Specifically, cement mortar is injected into the outside of each coaxial anchor rod 1, and the cement mortar is tightly connected to the surrounding rock 7 to support the tunnel 8.

[0042] Another object of the present invention is to provide a construction method for the above-mentioned deep high-temperature mine tunnel heat extraction and cooling device, comprising the following steps:

[0043] ① Drill a hole at the junction of the tunnel 8 and the surrounding rock 7, the diameter of the hole is 130mm-171mm, the depth of the hole is 1400mm-10200mm, and the coaxial anchor rod 1 is placed in the hole;

[0044] ② Inject cement mortar between the surrounding rock 7 and the outer wall of the coaxial anchor 1 to stabilize the surrounding rock 7;

[0045] ③ Lay the water inlet pipe 3 and the water outlet pipe 2, and respectively set a circulating water pump 5 on the water inlet pipe 3 and the water outlet pipe 2;

[0046] ④ Connect one end of the water inlet pipe 3 to the water inlet, connect the other end of the water inlet pipe 3 to the water source, fix one end of the water outlet pipe 2 to the water outlet, and connect the other end of the water outlet pipe 2 to the heat pump unit 4;

[0047] ⑤ Connect the heat pump unit 4 to the heat source utilization terminal 11.

[0048] During operation, the switch of the water source is turned on, and normal temperature water or cold water enters between the outer tube and the inner tube 6 of the coaxial anchor rod 1 from the water inlet pipe 3, and then flows out through the hollow part of the inner tube 6. The external water carries away the heat of the surrounding rock 7 through heat exchange, reduces the temperature of the surrounding rock 7, and thus reduces the temperature of the tunnel 8. After the tunnel 8 is cooled, a comfortable environment is provided for safe mining, and efficiency is improved. The water after heat exchange is transported to the heat pump unit 4 through the outlet pipe 2, and the heat extracted by the heat pump unit 4 is used for the heat source utilization terminal 11, such as winter heating and summer bathing in the mine. By regularly maintaining and overhauling the device of the present invention, long-term stable operation is ensured, so that even when the mine is shut down, the present invention can continue to be used to extract heat to supply production and living services in nearby towns.

[0049] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A deep high-temperature mine tunnel heat extraction and cooling device, characterized in that: It includes cooling support device, heat utilization device and connection device; The heat utilization device comprises a heat pump unit and a heat source utilization terminal, and the heat pump unit is connected to the heat source utilization terminal; The cooling support device comprises a cement mortar layer and a coaxial anchor rod, wherein the cement mortar layer is arranged between the coaxial anchor rod and the surrounding rock; the coaxial anchor rod comprises a tube body and a top portion, wherein the tube body and the top portion are fixedly connected, wherein the top portion is in a triangular pyramid shape, wherein the tube body comprises an inner tube, an outer tube, and a bracket, wherein the outer tube is sleeved on the outside of the inner tube, wherein a plurality of brackets are arranged between the outer tube and the inner tube, wherein a sealing port is arranged between the tail end of the inner tube and the tail end of the outer tube, wherein a water inlet is arranged at the sealing port, and a water outlet is arranged at the tail end of the inner tube; wherein a protrusion is arranged on the outer wall of the outer tube, and a thermal insulation material is applied to the outer wall of the inner tube; The connecting device includes a circulating water pump, a water inlet pipe, and a water outlet pipe. One end of the water inlet pipe is connected to the water inlet, and the other end of the water inlet pipe is connected to the water source. One end of the water outlet pipe is fixedly connected to the water outlet, and the other end of the water outlet pipe is connected to the heat pump unit. The circulating water pump is respectively arranged on the water inlet pipe and the water outlet pipe.

2. A deep high-temperature mine tunnel heat extraction and cooling device according to claim 1, characterized in that: The length of the coaxial anchor rod is 1200mm-10000mm, the diameter of the outer tube is 95mm-110mm, the diameter range of the inner tube is 38mm-50mm, the number of the protrusions is several, the interval between every two protrusions is 100mm-300mm, and the height of the protrusion is 5mm.

3. A deep high-temperature mine tunnel heat extraction and cooling device according to claim 1, characterized in that: The material of the inner tube is one of PB, PERT, PPR and PE.

4. A deep high-temperature mine tunnel heat extraction and cooling device according to claim 1, characterized in that: The outer tube is made of a steel tube.

5. The deep high-temperature mine tunnel heat extraction and cooling device according to claim 1 is characterized by: The thermal insulation material is a composite silicate thermal insulation coating.

6. A construction method for the deep high-temperature mine tunnel heat extraction and cooling device as claimed in claim 1, characterized in that: The steps include: ① Drill a hole at the junction of the tunnel and the surrounding rock, the diameter of the hole is 130mm-171mm, the depth of the hole is 1400mm-10200mm, and a coaxial anchor rod is placed in the hole; ②Inject cement mortar between the surrounding rock and the outer wall of the coaxial anchor; ③ Lay the water inlet pipe and the water outlet pipe, and install circulating water pumps on the water inlet pipe and the water outlet pipe respectively; ④ Connect one end of the water inlet pipe to the water inlet, connect the other end of the water inlet pipe to the water source, fix one end of the water outlet pipe to the water outlet, and connect the other end of the water outlet pipe to the heat pump unit; ⑤Connect the heat pump unit to the heat source utilization terminal.

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